Baby carrier and swinging mechanism

Abstract

Providing a baby carrier, a swinging mechanism, and a seat connection structure. 【Solution means】The baby carrier includes a main frame (1), a swing bracket assembly (2), and a seat (3). The main frame (1) is configured to be supported on the ground. The seat (3) is pivotally connected to the main frame (1) via the swing bracket assembly (2) and can swing back and forth with respect to the main frame (1).

Description

[Technical field]

[0001] This application claims priority to Chinese Patent Application No. 202210864532.4, filed on July 21, 2022 and entitled "Baby Carrier", Chinese Patent Application No. 202210865519.0, filed on July 21, 2022 and entitled "Seat Connection Structure and Baby Carrier With Same", Chinese Patent Application No. 202211194162.4, filed on September 28, 2022 and entitled "Baby Carrier and Swing Mechanism", Chinese Patent Application No. 202211441193.5, filed on November 17, 2022 and entitled "Baby Carrier", and Chinese Patent Application No. 202211666803.1, filed on December 23, 2022 and entitled "Baby Carrier", the entire contents of which are incorporated herein by reference. The present invention relates to a baby carrier and a swing mechanism. [Background technology]

[0002] Baby carriers such as baby dining chairs and strollers each consist of a main frame and a seat supported by the main frame. Summary of the Invention

[0003] In one aspect, the present application provides a baby carrier including a main frame, a swing bracket assembly, and a seat.

[0004] The main frame is configured to be supported on the ground, and the seat is pivotally connected to the main frame via a swing bracket assembly.

[0005] In some embodiments, the swing bracket assembly includes swing arms, each of which is pivotally connected to the main frame, and the baby carrier further includes a swing limiting mechanism, each of which is disposed between a respective swing arm and the main frame.

[0006] In some embodiments, a pivot is disposed on each swing arm, and the swing arm is pivotally connected to the main frame via the pivot. The swing limiting mechanism includes a fixed member fixed to the main frame and having a first limiting surface and a second limiting surface, and a contact member connected to the pivot, disposed between the first limiting surface and the second limiting surface, and limiting the swing of the swing arm by contacting the first limiting surface and the second limiting surface.

[0007] In some embodiments, the fixed member includes a limiting groove, and the first limiting surface and the second limiting surface are formed on the side walls of the limiting groove, or a limiting member is disposed in the limiting groove, and the first limiting surface and the second limiting surface are formed on the limiting member.

[0008] In some embodiments, the limiting member includes an opening through which the pivot can pass, and the first limiting surface and the second limiting surface are formed on the walls of the opening.

[0009] In some embodiments, the side walls of the limiting groove include a first side wall and a second side wall parallel to each other, and the first limiting surface and the second limiting surface are both formed on the first side wall and both formed on the second side wall. The contact member is configured to be inserted into the limiting groove and includes a first pair of parallel surfaces and a second pair of parallel surfaces. Here, when swinging to contact the first limiting surface, the first pair of parallel surfaces prevents the swing arm from continuing to swing in the first direction, and when swinging to contact the second limiting surface, the second pair of parallel surfaces prevents the swing arm from continuing to swing in the second direction opposite to the first direction.

[0010] In some embodiments, a support pipe is provided on the main frame, the fixed member is sleeved inside the support pipe, the limiting groove is configured to extend longitudinally along the fixed member, has a groove opening, and the contact member is inserted into the limiting groove from the groove opening. The support pipe has a first through hole, the fixed member has a second through hole, the pivot is configured to pass through the first through hole and the second through hole, and the axis of the support pipe is substantially perpendicular to the axis of the pivot.

[0011] In some embodiments, the first shaft sleeve is fitted to the pivot, the first shaft sleeve is disposed on one side of the limiting groove, installed in the second through hole, and / or the end of the pivot includes a first flat head portion, and the abutting member includes a first flat hole for engaging with the first flat head portion. A first limiting structure is disposed on the first flat head portion, and the first limiting structure is configured to prevent the abutting member from disengaging from the first flat head portion.

[0012] In some embodiments, a first step is formed at the root of the first flat head portion, a first positioning recess is formed in the first flat head portion, and the first limiting structure includes a spring clip disposed on the other side of the limiting groove and a first positioning sleeve. The first positioning sleeve fits onto the first flat head portion and includes a radial through slot for receiving the spring clip. The spring clip is inserted into the radial through slot and configured to engage with the first positioning recess. As a result, the abutting member is clamped between the first step and the first positioning sleeve.

[0013] In some embodiments, a second flat hole is formed in the first positioning sleeve and configured to engage with the first flat head portion. A positioning hole and a positioning post are respectively disposed on the opposite end faces of the abutting member and the first positioning sleeve and engage with each other.

[0014] In some embodiments, the pivot and the swing arm are integrally formed, and / or the first positioning sleeve is installed inside the second through hole, and / or the axial guide groove and the axial guide rib engage with each other and are respectively disposed on the outer circumference of the first shaft sleeve and the hole wall of the second through hole.

[0015] In some embodiments, the baby carrier further includes a first swing lock mechanism for locking the swing of the seat.

[0016] In some embodiments, the first swing lock mechanism includes a first release member, a lock pin, and a first elastic element. The first elastic element exerts an elastic force on the lock pin and is configured to extend the lock pin outward and insert it into the lock hole of the seat. The first release member is operably connected to the lock pin and pushes the lock pin to retract it from the lock hole.

[0017] In some embodiments, a first annular flange is disposed at an intermediate portion of the lock pin. The first annular flange divides the lock pin into a first portion and a second portion. The first portion is configured to be inserted into the lock hole, and the first elastic element fits onto the second portion.

[0018] The first release member has an unlocked position and a locked position. The first release member is provided with a first elongated hole, and a first stop boss extending obliquely is formed on the hole wall of the first elongated hole.

[0019] The first annular flange is sandwiched between the first stop boss and the first elastic element. When the first release member moves to the unlocked position, the first stop boss pushes the first annular flange to retract the lock pin.

[0020] In some embodiments, the main frame further includes a first mounting housing. The first swing lock mechanism is installed within the first mounting housing. The first mounting housing includes a third through hole, and the lock pin is configured to protrude from the third through hole. The first release member is movable relative to the first mounting housing and can be switched to the unlocked position or the locked position. The first release member includes a first push block, and the first mounting housing includes a first opening through which the first push block can pass.

[0021] In some embodiments, the first swing lock mechanism is installed on the main frame or the swing bracket assembly.

[0022] The first swing lock mechanism includes a first release member, a lock pin, and a first elastic element.

[0023] The moving direction of the first release member is perpendicular to the telescopic direction of the lock pin.

[0024] In some embodiments, one of the first release member and the lock pin has a first connection hole, the other of the first release member and the lock pin has a first cylinder, the first connection hole has a first inclined wall, and the first cylinder is configured to be inserted into the first connection hole.

[0025] The first release member has an unlocked position and a locked position. When the first release member is in the locked position, the lock pin is inserted into the lock hole. When the first release member moves from the locked position to the unlocked position, the first inclined wall abuts against the first cylinder, and the lock pin is retracted from the lock hole.

[0026] In some embodiments, a first limiting portion is provided at one end of the first inclined wall. The first limiting portion is configured to engage with the first cylinder to hold the first release member in the unlocked position.

[0027] In some embodiments, the swing bracket assembly includes a swing housing. The first swing lock mechanism is attached to the swing housing. The swing housing is provided with a first sideway that slidably engages with the first release member and a second sideway that slidably engages with the lock pin.

[0028] In some embodiments, a first connection hole is formed in the first release member, the first cylinder is disposed on the lock pin, an inclined guide wall is formed on the second side wall, and the first cylinder is guided by the inclined guide wall and enters the first connection hole.

[0029] In some embodiments, the first swing lock mechanism further includes a mounting post. The lock pin fits into the mounting post and is rotatable with respect to the mounting post. The lock pin and the mounting post are rotatable with respect to each other.

[0030] A second connection hole is provided in one of the mounting post and the lock pin, a second cylinder is provided in the other of the mounting post and the lock pin, a second inclined wall is provided in the second connection hole, and the second cylinder is configured to be inserted into the second connection hole.

[0031] The first release member has a lock release position and a lock position. When the first release member is in the lock position, the lock pin is inserted into the lock hole. When the first release member moves from the lock position to the lock release position, the first release member drives the lock pin to rotate with respect to the mounting post, and at the same time, the second inclined wall abuts against the second cylinder to drive the lock pin to retract from the lock hole.

[0032] In some embodiments, a second limiting portion is provided at one end of the second inclined wall, and the second limiting portion is configured to engage with the second cylinder to hold the first release member in the lock release position.

[0033] In some embodiments, the swing bracket assembly includes a swing housing, the first swing lock mechanism is installed in the swing housing, and the first release member is connected to the lock pin via a crank slider mechanism.

[0034] In some embodiments, a seventh positioning mechanism is disposed between the swing housing and the first release member, and the seventh positioning mechanism is configured to hold the first release member in the lock release position or the lock position.

[0035] In some embodiments, the opening includes a first hole portion, the first hole portion includes a first wall and a second wall, the first limiting surface and the second limiting surface are both formed on the first wall and both formed on the second wall.

[0036] The abutting member is a second flat head portion formed on the pivot. The second flat head portion is adjacent to the first end portion of the pivot and includes a first plane and a second plane parallel to each other. During the swinging of the swing arm, the first plane and the second plane abut against the first limiting surface and the second limiting surface to limit the swinging angle of the swing arm.

[0037] In some embodiments, the opening further includes a second hole portion communicating with the first hole portion.

[0038] The position of the limiting member in the limiting groove is adjustable, and at least a part of the second flat head portion can engage with the second hole portion to lock the swing of the swing arm.

[0039] In some embodiments, the first hole portion is formed by abutting two sector-shaped sub-holes, the two limiting portions are formed at the joint of the two sector-shaped sub-holes, and when the second flat head portion engages with the second hole portion, the second flat head portion has a portion sandwiched between the two limiting portions.

[0040] In some embodiments, the limiting groove has a groove opening and a groove bottom.

[0041] One of the second hole portion and the first hole portion is adjacent to the groove bottom of the limiting groove, and the other of the second hole portion and the first hole portion is adjacent to the groove opening of the limiting groove.

[0042] The second elastic element is installed inside the limiting groove and is sandwiched between the groove bottom and the limiting member.

[0043] When a pressing force is applied to the limiting member, the limiting member overcomes the elastic force of the second elastic element and moves in the direction of the groove bottom. When the pressing force is released, the second elastic element drives the limiting member to move in the direction of the groove opening so that the first hole portion and the second hole portion can selectively engage with the second flat head portion.

[0044] In some embodiments, a support pipe is provided on the main frame, the fixing member is sleeved inside the support pipe, the limiting groove is configured to extend longitudinally along the fixing member, has a groove opening, and the limiting member is inserted into the limiting groove from the groove opening.

[0045] The support pipe has a first through hole, the fixing member has a second through hole, the pivot is configured to pass through the first through hole and the second through hole, and the axis of the support pipe is substantially perpendicular to the axis of the pivot.

[0046] In some embodiments, a second shaft sleeve fits onto the pivot, the second shaft sleeve is disposed on one side of the limiting groove, and is disposed to pass through the second through hole.

[0047] The pivot and the swing arm are of a separate structure. A flat head connection portion is provided on and protrudes from the end face of the second end of the pivot. The swing arm is provided with a connection piece, and the connection piece is provided with a third flat hole that engages with the flat head connection portion. The pivot is provided with a second limiting structure, and the second limiting structure is configured to prevent the connection piece, the pivot, and the limiting member from separating from each other.

[0048] In some embodiments, the pivot includes a central hole, a second step is formed at the root of the second flat head portion, and a third step is formed at the root of the flat head connection portion.

[0049] The second limiting structure includes a bolt and a nut. The tail end of the bolt is inserted into the central hole from the second end of the pivot, exits the central hole from the first end of the pivot and is screwed into the nut. The nut is disposed on the other side of the limiting groove and is disposed within the second through hole.

[0050] The connection piece is clamped between the third step and the head portion of the bolt, and the limiting member is clamped between the second step and the nut.

[0051] In some embodiments, the pivot further includes a prism protruding from the end face of the second flat head portion, and the nut forms a second positioning recess that engages with the prism.

[0052] In some embodiments, the baby carrier further includes a second swing lock mechanism, and the second swing lock mechanism is operably connected to the limiting member.

[0053] In some embodiments, the clamp portion is disposed at an upper portion close to the groove opening of the restricting member.

[0054] The second swing lock mechanism includes a second release member and an engaging member. The engaging member is fitted to a rotation axis parallel to the pivot. An engaging boss and an evading portion are disposed on the outer periphery of the engaging member. The second release member is configured to rotationally drive the engaging member.

[0055] When the engaging boss rotates to a position where it abuts against the clamp portion, the restricting member moves in the direction of the groove bottom. When the evading portion rotates to a position where it abuts against the upper portion of the restricting member, the restricting member moves in the direction of the groove opening.

[0056] In some embodiments, the second swing lock mechanism further includes a first connecting member. The first connecting member is connected between the engaging member and the second release member. The second release member drives the engaging member to rotate via the first connecting member.

[0057] In some embodiments, the first connecting member has a curved shape. A first connecting pin is provided at one of the first end of the first connecting member and the second release member. A second elongated hole that slidably engages with the first connecting pin is provided at the other of the first end of the first connecting member and the second release member.

[0058] A connecting lug is disposed on the engaging member. A second connecting pin is provided at one of the second end of the first connecting member and the connecting lug. A third elongated hole that slidably engages with the second connecting pin is provided at the other of the second end of the first connecting member and the connecting lug.

[0059] In some embodiments, the main frame further includes a second mounting housing. The second swing lock mechanism and the rotation axis are installed in the second mounting housing.

[0060] The second release member includes a second push block, and the second mounting housing includes a third opening that enables the movement of the second push block.

[0061] The fixing member is disposed within the second mounting housing, and the second mounting housing is provided with a fourth opening through which the swing arm can pass.

[0062] In some embodiments, the extending direction of the limiting groove is parallel to the axial direction of the pivot, and the pivot is arranged to pass through the limiting groove.

[0063] In some embodiments, the limiting member includes a first region and a second region, the first region has a first limiting surface and a second limiting surface, and the second region is adapted to engage with the abutting member to lock the swing arm.

[0064] The limiting member is slidably engaged with the limiting groove and has a first position and a second position. When the limiting member is in the first position, the first region engages with the abutting member, and when the limiting member is in the second position, the second region engages with the abutting member.

[0065] In some embodiments, the limiting member includes a force receiving plate and at least one arm extending from the force receiving plate, and the first region and the second region are formed on the at least one arm.

[0066] In some embodiments, the abutting member is provided with at least one first groove portion, and each first groove portion includes a first end wall and a second end wall on opposite sides of each other.

[0067] When at least one arm is configured to pass through at least one first groove portion and swings such that the first end walls respectively abut against the first limiting surfaces, the swing arm is prevented from continuously swinging in the first direction, and when it swings such that the second end walls respectively abut against the second limiting surfaces, the swing arm is prevented from continuously swinging in the second direction.

[0068] In some embodiments, the abutting member is further provided with at least one second groove portion, and the at least one second groove portion is adapted to engage with a corresponding second region.

[0069] In some embodiments, the at least one second groove portion is formed at the groove bottom of the at least one first groove portion. The first clamp block is disposed in the second region of the at least one arm, and the first clamp block is adapted to engage with the corresponding second groove portion.

[0070] In some embodiments, the at least one first groove portion and the at least one second groove portion coincide with each other. The second region of the at least one arm includes a second clamp block, and the second clamp block is adapted to engage with the corresponding first groove portion.

[0071] In some embodiments, the limiting groove has a groove opening and a groove bottom, the force receiving plate is adjacent to the groove bottom, and the abutting member is adjacent to the groove opening.

[0072] The third elastic element is disposed in the limiting groove and is configured to apply a driving force to the force receiving plate to move the force receiving plate toward the groove bottom.

[0073] The baby carrier is further provided with a third swing lock mechanism, and the third swing lock mechanism is operably connected to the force receiving plate and drives the limiting member to switch between a first position and a second position.

[0074] In some embodiments, the third swing lock mechanism is disposed on a pivot and includes a driving wheel that abuts against a side surface of the force receiving plate facing the groove bottom.

[0075] A ratchet portion is provided on one of the walls of the limiting groove and the drive wheel, and a ratchet groove portion is provided on the other of the wall of the limiting groove and the drive wheel. The ratchet groove portion includes a first ratchet groove having a first groove depth and a second ratchet groove having a second groove depth, which are sequentially arranged in the circumferential direction. The first groove depth is not equal to the second groove depth. The drive wheel moves axially and rotates circumferentially when receiving a pressing force. The ratchet portion sequentially engages with the first ratchet groove and the second ratchet groove.

[0076] In some embodiments, a mounting hole is formed at the bottom of the limiting groove.

[0077] The third swing lock mechanism further includes a press member, which has a pressing portion and a pushing portion extending from the pressing portion. The pushing portion extends into the limiting groove through the mounting hole and is configured to apply a pressing force to the slope of the first ratchet groove or the slope of the second ratchet groove.

[0078] In some embodiments, the third swing lock mechanism further includes a restoring spring, which is configured to drive the press member to reset.

[0079] The pushing portion includes at least one push arm extending from the pressing portion. A push step is formed in the middle of each push arm, and hooks are formed at both ends of the push arm. The drive wheel is positioned between the push step and the hooks. The push step is configured to apply a pressing force, and the hooks are configured to hook the drive wheel after the pressing force is released.

[0080] In some embodiments, the ratchet portion is formed on the wall of the limiting groove, and the ratchet groove portion is formed on the drive wheel.

[0081] In some embodiments, the wall of the limiting groove has a first axial guide portion, which is configured to guide the limiting member to move axially.

[0082] In some embodiments, a support pipe is provided on the main frame, a first through hole is provided in the support pipe, the axis of the first through hole is perpendicular to the axis of the support pipe, the fixing member is sleeved in the first through hole, and a second axial guide portion is formed on the hole wall of the first through hole and is configured to guide the axial movement of the fixing member during installation.

[0083] In some embodiments, the swing bracket assembly further includes an auxiliary swing arm, and the auxiliary swing arm is configured to assist the swing arm in supporting the seat.

[0084] In some embodiments, the swing bracket assembly further includes a connector, the swing arm and the auxiliary swing arm are each pivotally connected to the connector, and a locking portion is disposed on the connector and is configured to engage with the seat.

[0085] In some embodiments, the main frame further includes a third mounting housing, the fixing member is disposed inside the third mounting housing, a limiting recess is formed outside the third mounting housing, the limiting recess has a first limiting wall and a second limiting wall, and the swing arm is configured to swing between the first limiting wall and the second limiting wall.

[0086] In some embodiments, the swing bracket assembly is pivotally connected to the main frame, the seat is pivotally connected to the swing bracket assembly, and the seat is configured to swing relative to the main frame by the swing bracket assembly.

[0087] The baby carrier further includes a seat holding mechanism disposed between the main frame and the seat, and the seat holding mechanism is configured to control the seat to be kept horizontal during swinging.

[0088] In some embodiments, the main frame has a first pivot portion, the seat has a second pivot portion, and the first pivot portion and the second pivot portion are each pivotally connected to a swing bracket assembly.

[0089] When the swing bracket assembly swings by a first angle in one direction around the first pivot portion, the seat swings by the first angle in another opposite direction around the second pivot portion due to the action of the seat holding mechanism.

[0090] In some embodiments, the swing bracket assembly includes a swing housing, and the first pivot portion and the second pivot portion are each pivotally connected to the swing housing.

[0091] In some embodiments, the seat holding mechanism is attached to the swing bracket assembly and connected between the first pivot portion and the second pivot portion.

[0092] In some embodiments, the first pivot portion includes a first toothed portion, the second pivot portion includes a second toothed portion, the seat holding mechanism includes a gear transmission system, and the first toothed portion and the second toothed portion each mesh with the gear transmission system.

[0093] In some embodiments, the main frame includes a fourth mounting housing, and the swing housing has a first receiving portion.

[0094] The first pivot portion includes a mounting portion and a first pivot ring. The mounting portion is disposed within the fourth mounting housing, the mounting portion is sleeved within the first pivot ring, the mounting portion and the first pivot ring are non-rotatable relative to each other, and the first pivot ring is sleeved within the first receiving portion.

[0095] In some embodiments, the first tooth portion is formed on at least a part of the outer peripheral wall of the first pivot ring, the second pivot portion 38 includes a second tooth portion, and the first tooth portion meshes with the second tooth portion via a gear transmission system.

[0096] In some embodiments, the swing housing has a first receiving portion, and the first pivot portion includes a first pivot ring sleeved inside the first receiving portion.

[0097] The baby carrier further includes a first axial limiting mechanism, and the first axial limiting mechanism is configured to limit the axial movement of the first pivot ring relative to the swing housing.

[0098] In some embodiments, the first axial limiting mechanism includes a limiting step formed on the wall of the first receiving portion and an elastic stop block, and the first pivot ring is clamped between the limiting step and the elastic stop block.

[0099] In some embodiments, a first guide groove is formed on the outer peripheral wall of the first pivot ring. When the first pivot ring is attached to the swing housing, the elastic stop block is slidably engaged with the first guide groove, and the groove depth and / or width of the first guide groove gradually increases along the attachment direction of the first pivot ring.

[0100] In some embodiments, the baby carrier further includes a first swing limiting mechanism, and the first swing limiting mechanism is configured to limit the swing angle of the swing housing relative to the main frame.

[0101] In some embodiments, the swing housing has a first receiving portion, and the first pivot portion includes a first pivot ring sleeved inside the first receiving portion.

[0102] The first swing limiting mechanism includes a first groove and a first stop portion. The first groove is formed on one of the wall of the first receiving portion and the outer peripheral wall of the first pivot ring. The first stop portion is disposed on the other of the wall of the first receiving portion and the outer peripheral wall of the first pivot ring. The first stop portion is configured to extend into the first groove. When the swing housing swings, the first stop portion selectively abuts against one of the two end walls of the first groove.

[0103] In some embodiments, the mounting portion is columnar, and a protruding rib and a second guide groove that engage in an uneven fitting manner are provided between the mounting portion and the first pivot ring.

[0104] The mounting portion is columnar. A first elastic arm is disposed on the outer peripheral wall of the mounting portion. A protruding finger is provided on the first elastic arm. A locking portion is formed on the inner peripheral wall of the first pivot ring. The locking portion abuts against the protruding finger to prevent the first pivot ring from coming off the mounting portion.

[0105] In some embodiments, the swing housing has a second receiving portion.

[0106] The second pivot portion includes a second pivot ring. The second pivot ring is fixedly connected to the seat. The second pivot ring is sleeved in the second receiving portion.

[0107] In some embodiments, the second tooth portion is formed on at least a part of the outer peripheral wall of the second pivot ring. The first pivot portion includes a first tooth portion. The second tooth portion meshes with the first tooth portion via a gear transmission system.

[0108] In some embodiments, the baby carrier further includes a second axial limiting mechanism configured to limit the axial movement of the swing housing with respect to the second pivot ring.

[0109] In some embodiments, the second axial direction limiting mechanism includes a second elastic arm disposed within the second receiving portion, and the second elastic arm is configured to pass through the inner hole of the second pivot ring and engage with the edge of the inner hole.

[0110] In some embodiments, the baby carrier further includes a second swing limiting mechanism configured to limit the swing angle of the seat with respect to the swing housing.

[0111] In some embodiments, the swing housing has a second receiving portion, and the second pivot portion includes a second pivot ring sleeved inside the second receiving portion.

[0112] The second swing limiting mechanism includes a second groove portion and a second stopping portion. The second groove portion is formed on one of the wall of the second receiving portion and the outer peripheral wall of the second pivot ring, and the second stopping portion is disposed on the other of the wall of the second receiving portion and the outer peripheral wall of the second pivot ring. The second stopping portion is configured to extend into the second groove portion. When the swing housing swings, the second stopping portion selectively abuts against one of the two end walls of the second groove portion.

[0113] In some embodiments, the baby carrier further includes a fourth swing locking mechanism for locking or releasing the swing of the seat.

[0114] In some embodiments, the first pivot portion includes a first tooth portion, the second pivot portion includes a second tooth portion, the seat holding mechanism includes a gear transmission system, and the first tooth portion and the second tooth portion are respectively engaged with the gear transmission system.

[0115] The gear transmission system includes a driving gear, and a limiting groove is formed in the driving gear.

[0116] The fourth swing lock mechanism is installed on the swing housing and includes a fourth release member and a lock block. The lock block is adapted to be inserted into the limiting groove, and the fourth release member is operatively connected to the lock block and drives the lock block to be removed from the limiting groove.

[0117] In some embodiments, the fourth swing lock mechanism further includes a driving member. The lock block is installed on the driving member, and the fourth release member is configured to drive the lock block via the driving member.

[0118] In some embodiments, the fourth release member is slidably engaged with the swing housing, the driving member is slidably engaged with the swing housing, and the sliding directions of the fourth release member and the driving member intersect.

[0119] In some embodiments, the driving member has a third connection hole, and the third connection hole has a third inclined wall.

[0120] The swing housing is provided with a seventh elongated hole. The fourth release member is provided with an operating portion and a third pillar extending from the operating portion. The third pillar is configured to enter the third connection hole through the seventh elongated hole.

[0121] When the fourth release member moves from the locked position to the unlocked position, the third pillar presses against the third inclined wall, and the driving member can drive the lock block to be removed from the limiting groove.

[0122] In some embodiments, a third limiting portion is provided at one end of the third inclined wall. The third limiting portion is engaged with the third pillar and configured to hold the fourth release member in the unlocked position.

[0123] Elastic claws are provided on the hole wall of the seventh elongated hole. When the fourth release member moves to the locked position, the elastic claws sandwich the third pillar to hold the fourth release member in the locked position.

[0124] In some embodiments, the drive member includes a first side portion and a second side portion located on opposite sides of each other, and a third side portion connected between the first side portion and the second side portion.

[0125] The drive gear is disposed between the first side portion and the second side portion, and the lock block is disposed on the third side portion.

[0126] In some embodiments, the fourth swing lock mechanism further includes a fourth elastic element configured to drive the lock block to insert into the limiting groove.

[0127] In some embodiments, the drive gear includes a third tooth portion meshing with the first tooth portion and a fourth tooth portion meshing with the second tooth portion, and the limiting groove is disposed between the third tooth portion and the fourth tooth portion.

[0128] In some embodiments, the first pivot portion includes a first pivot ring disposed within the swing housing, and the second pivot portion includes a second pivot ring disposed within the swing housing.

[0129] The seat holding mechanism includes a first lacing cable that fits onto the first pivot ring and the second pivot ring.

[0130] In some embodiments, a first annular groove is formed on the outer peripheral wall of the first pivot ring, the first lacing cable is wound around the first annular groove, and a first positioning mechanism is disposed between the first lacing cable and the first pivot ring.

[0131] A second annular groove is formed on the outer peripheral wall of the second pivot ring, the first lacing cable is wound around the second annular groove, and a second positioning mechanism is disposed between the first lacing cable and the second pivot ring.

[0132] In some embodiments, the sheet holding mechanism includes an intermediate member disposed on the swing housing, the first pivot portion includes a first pivot ring disposed within the swing housing, and the second pivot portion includes a second pivot ring disposed within the swing housing.

[0133] The sheet holding mechanism further includes a second wrapping cable and a third wrapping cable, the second wrapping cable fitting to one position of the intermediate member and the first pivot ring, and the third wrapping cable fitting to another position of the intermediate member and the second pivot ring.

[0134] In some embodiments, a third annular groove is formed on the outer peripheral wall of the first pivot ring, a fourth annular groove and a fifth annular groove are formed on the outer peripheral wall of the intermediate member at an axial interval, and a sixth annular groove is formed on the outer peripheral wall of the second pivot ring.

[0135] The second wrapping cable is wound around the third annular groove and the fourth annular groove, and the third wrapping cable is wound around the fifth annular groove and the sixth annular groove.

[0136] In some embodiments, a third positioning mechanism is disposed between the second wrapping cable and the first pivot ring, and a fourth positioning mechanism is disposed between the second wrapping cable and the intermediate member.

[0137] A sixth positioning mechanism is disposed between the third wrapping cable and the sixth annular groove.

[0138] In some embodiments, a fifth positioning mechanism is disposed between the third wrapping cable and the fifth annular groove.

[0139] In some embodiments, the sheet holding mechanism includes a slide pin and a slide groove.

[0140] The slide pin is disposed on one of the main frame and the sheet.

[0141] The slide groove is provided on the other side of the main frame and the seat.

[0142] When the swing bracket assembly swings relative to the main frame, the slide pin and the slide groove engage with each other slidably, and control is exerted so that the seat is kept horizontal during swinging.

[0143] In some embodiments, the slide pin is parallel to the swing axis of the seat, and / or the slide groove is a curved groove.

[0144] In some embodiments, a locking hole is formed in the slide groove.

[0145] The slide pin has a locking position where the slide pin protrudes into the locking hole and an unlocking position where the slide pin retracts from the locking hole. When the slide pin is in the locking position, the swinging of the seat is locked, and when the slide pin is in the unlocking position, the swinging of the seat is released.

[0146] In some embodiments, the baby carrier further includes a fifth swing locking mechanism, and the fifth swing locking mechanism is configured to control the extension and contraction of the slide pin to lock or release the swinging of the seat.

[0147] In some embodiments, the fifth swing locking mechanism includes a fifth release member and a fifth elastic element. The fifth release member is configured to drive the slide pin to pull it back from the locking hole, and the fifth elastic element is configured to drive the slide pin to insert it into the locking hole.

[0148] In some embodiments, a second annular flange is disposed at the center of the slide pin. The second annular flange divides the slide pin into a first part and a second part. The first part is configured to be inserted into the locking hole, and the fifth elastic element fits onto the second part.

[0149] The fifth release member has an eighth elongated hole, and a second stop boss extending obliquely is formed on the hole wall of the eighth elongated hole, and the second annular flange is sandwiched between the second stop boss and the fifth elastic element.

[0150] In some embodiments, a locking protrusion is further formed on the hole wall of the eighth elongated hole, and the locking protrusion is configured to engage with the slide pin to hold the fifth release member in the unlocked position.

[0151] In some embodiments, the main frame includes a fourth mounting housing.

[0152] The first connecting member is installed on the swing bracket assembly and is pivotally connected to the swing bracket assembly.

[0153] The first connecting member is configured to be locked within the fourth mounting housing.

[0154] In some embodiments, the fourth mounting housing includes a first clamping recess.

[0155] The first connecting member includes a first locking platform, the first locking platform is adapted to be inserted into the first clamping recess, and a first engagement mechanism is disposed between the first locking platform and the first clamping recess.

[0156] In some embodiments, the main frame includes a fourth mounting housing.

[0157] The seat holding mechanism includes a slide pin and a slide groove, the slide pin is attached to the second connecting member, the second connecting member engages with the fourth mounting housing, the slide groove is formed in the seat, and the slide pin is disposed to pass through the slide groove.

[0158] When the swing bracket assembly swings relative to the main frame, the slide pin and the slide groove engage slidably to control the seat to be kept horizontal during swinging.

[0159] In some embodiments, the fourth mounting housing includes a second clamping recess.

[0160] The second connecting member includes a second locking platform, the second locking platform is adapted to be inserted into the second clamping recess, and a second engaging mechanism is provided between the second locking platform and the second clamping recess.

[0161] In some embodiments, the slide pin is a bolt, and the tail end of the bolt is configured to be connected to a nut through the second connecting member and the slide groove.

[0162] In another aspect, the present invention provides a swing mechanism including a fixing member, a swing arm, and a contact member.

[0163] The fixing member has a first limiting surface and a second limiting surface.

[0164] The swing arm has a pivot pivotable with respect to the fixing member.

[0165] The contact member is connected to the pivot, is disposed between the first limiting surface and the second limiting surface, and regulates the swing angle of the swing arm by contacting the first limiting surface and the second limiting surface.

[0166] In some embodiments, the fixing member includes a limiting groove.

[0167] The first limiting surface and the second limiting surface are formed on the side walls of the limiting groove, or a limiting member is provided in the limiting groove, and the first limiting surface and the second limiting surface are formed on the limiting member.

[0168] In some embodiments, the extending direction of the limiting groove is perpendicular to the axial direction of the pivot, and the limiting groove has a groove opening.

[0169] The side walls of the limiting groove include a first side wall and a second side wall that are parallel to each other, and the first limiting surface and the second limiting surface are both formed on the first side wall and both formed on the second side wall.

[0170] The abutting member is configured to be inserted into the limiting groove through the groove opening, and includes a first pair of parallel surfaces and a second pair of parallel surfaces.

[0171] When the first pair of parallel surfaces swing until the swing arm abuts against the first limiting surface, it prevents the swing arm from continuing to swing in the first direction, and when the second pair of parallel surfaces swing until the swing arm abuts against the second limiting surface, it prevents the swing arm from continuing to swing in the second direction opposite to the first direction.

[0172] In some embodiments, the extending direction of the limiting groove is perpendicular to the axial direction of the pivot, and the position of the limiting member within the limiting groove is adjustable.

[0173] The limiting member is provided with an opening through which the pivot can pass. The opening includes a first hole portion and a second hole portion. The first hole portion includes a first wall and a second wall. The first limiting surface and the second limiting surface are both formed on the first wall and both formed on the second wall. The second hole portion is configured to engage with the abutting member to lock the swing arm.

[0174] In some embodiments, the extending direction of the limiting groove is parallel to the axial direction of the pivot.

[0175] The limiting member includes a first region and a second region. The first region has a first limiting surface and a second limiting surface. The second region is adapted to engage with the abutting member to lock the swing arm.

[0176] The limiting member engages slidably with the limiting groove and has a first position and a second position. When the limiting member is in the first position, the first region engages with the abutting member, and when the limiting member is in the second position, the second region engages with the abutting member.

[0177] In some embodiments, the limiting member includes a force receiving plate and at least one arm extending from the force receiving plate, and the first region and the second region are formed on the at least one arm.

[0178] At least one first groove is formed on the outer periphery of the abutting member, at least one arm passes through the at least one first groove, and the first region is configured to swing within the corresponding first groove.

[0179] At least one second groove is further formed in the abutting member, and the second region is configured to engage with the corresponding second groove.

[0180] In some embodiments, the baby carrier further includes a drive wheel mounted on a pivot and abutting against the force receiving plate.

[0181] A ratchet portion is provided on one of the wall of the limiting groove and the drive wheel, and a ratchet groove portion is provided on the other of the wall of the limiting groove and the drive wheel. The ratchet groove portion includes a first ratchet groove having a first groove depth and a second ratchet groove having a second groove depth, which are sequentially arranged in the circumferential direction. The first groove depth is not equal to the second groove depth. When the drive wheel receives a pressing force, it moves axially and rotates circumferentially, and the ratchet portion sequentially engages with the first ratchet groove and the second ratchet groove.

[0182] In yet another aspect, the present invention provides a seat connection structure including a support frame, a first positioning groove, a second positioning groove, and a locking device.

[0183] The support frame includes a first support rod and a second support rod arranged to face each other.

[0184] The first positioning groove and the second positioning groove are formed on the first surface of the seat. The first positioning groove is configured to receive the first support rod, and the second positioning groove is configured to receive the second support rod.

[0185] The locking device includes a first block member, a second block member, and an elastic element. The first block member and the second block member are each slidably engaged with the seat, and the elastic element is configured to drive the first block member and the second block member to a locked position.

[0186] In some embodiments, the second surface of the seat includes a first slide groove and a second slide groove. The first slide groove intersects the first positioning groove, and the second slide groove intersects the second positioning groove. The second surface of the seat and the first surface of the seat face away from each other.

[0187] The first block member is slidably disposed within the first slide groove, and the second block member is slidably disposed within the second slide groove.

[0188] In some embodiments, the seat further has a third slide groove, and the first slide groove and the second slide groove communicate with each other through the third slide groove.

[0189] The locking device further includes a connection bracket. The connection bracket is disposed within the third slide groove. At both ends of the connection bracket, a first surface and a second surface bent downward with respect to the connection bracket are respectively provided. The first blocking member is connected to the first surface, and the second blocking member is connected to the second surface.

[0190] A fourth elongated hole is provided in the bottom wall of the third slide groove, and a fastener is provided inside the connection bracket. The first end of the fastener is configured to pass through the fourth elongated hole and extend out of the fourth elongated hole.

[0191] In some embodiments, the first surface of the seat further includes a fourth slide groove. The fourth slide groove and the third slide groove are adjacent in the extending direction of the fastener, and the fourth slide groove is disposed between the first slide groove and the second slide groove.

[0192] The locking device further includes a third release member, the third release member is received in a fourth slide groove, and a first end portion of the fastener is connected to the third release member.

[0193] The elastic element is clamped between the side wall of the fourth slide groove and the third release member.

[0194] In some embodiments, a first receiving groove is provided at a first end portion of the third release member, the first receiving groove is configured to receive an end portion of the elastic element, and a pressing recess is provided at a second end portion of the third release member.

[0195] A shield plate is provided in a partial region of the fourth slide groove, and the shield plate shields the elastic element.

[0196] In some embodiments, the locking device further includes a second connecting member, and the second connecting member is operably connected to the first blocking member and the second blocking member. When one of the first blocking member and the second blocking member is pushed and one of the first support rod and the second support rod is released, under the action of the second connecting member, the other of the first blocking member and the second blocking member is pushed and the other of the first support rod and the second support rod is released.

[0197] In some embodiments, there are main grooves on the second surface of the seat, the main grooves intersect with the first positioning groove and the second positioning groove respectively, and the second surface of the seat and the first surface of the seat face away from each other.

[0198] The first blocking member and the second blocking member are slidably disposed in the main groove.

[0199] In some embodiments, the first end portions of the first blocking member and the second blocking member that are separated from each other are respectively configured to lock the first support rod and the second support rod.

[0200] A first connection boss is disposed at the second end of the first blocking member, a second connection boss is disposed at the second end of the second blocking member, and the second ends of the first blocking member and the second blocking member are close to each other.

[0201] The second connecting member is a rod, the first end of the second connecting member is pivotally connected to the first connection boss, and the second end of the second connecting member is pivotally connected to the second connection boss.

[0202] In some embodiments, the elastic element includes a first spring and a second spring. The first spring is disposed between the end of the first connection boss and the second blocking member, and the second spring is disposed between the end of the second connection boss and the first blocking member.

[0203] In some embodiments, a first protruding post is provided at the first end of the second connecting member, and a second protruding post is provided at the second end of the second connecting member.

[0204] The first connection boss is provided with a fifth elongated hole that slidably engages with the first protruding post, and the second connection boss is provided with a sixth elongated hole that slidably engages with the second protruding post.

[0205] A first recess is formed in the first connection boss. The first end of the second connecting member is received in the first recess, and the first protruding post is configured to enter the fifth elongated hole through the first recess.

[0206] A second recess is formed in the second connection boss. The second end of the second connecting member is received in the second recess, and the second protruding post is configured to enter the sixth elongated hole through the second recess.

[0207] In some embodiments, a first wedge and a second wedge are disposed on the side wall of the main groove. The first wedge is configured to abut against the first blocking member, and the second wedge is configured to abut against the second blocking member.

[0208] Push bevels are provided at the first ends of the mutually separated first blocking members and the first ends of the second blocking members, respectively.

Brief Description of the Drawings

[0209]

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[0210] First Embodiment

[0211] Figures 1 to 13 exemplarily show a baby carrier according to a first embodiment of the present invention. In the first embodiment, the baby carrier is described by taking a baby dining chair as an example, but the type of the baby carrier is not limited to the baby dining chair. For example, in some embodiments, the baby carrier is, for example, a baby stroller or other suitable products. Referring to FIGS. 1 to 4, the baby carrier includes a main frame 1, a swing bracket assembly 2, and a seat 3. The main frame 1 is supported by the ground. The swing bracket assembly 2 is connected to the main frame 1 and is configured to swing back and forth with respect to the main frame 1. The seat 3 is pivotally connected to the main frame 1 via the swing bracket assembly 2, and the seat can swing back and forth with respect to the main frame 1.

[0212] It should be understood that the main frame 1 can have different shapes according to the type of the baby carrier. For example, when the baby carrier is a baby dining chair, the main frame 1 is a high chair frame, and when the baby carrier is a baby stroller, the main frame 1 is a movable frame with rollers arranged at the lower part. Referring to FIGS. 1 to 4, in the first embodiment, the main frame 1 is a high chair frame and includes two front leg support parts 101 arranged at intervals in the left-right direction and two rear leg support parts 102 arranged at intervals in the left-right direction. The lower ends of the two front leg support parts 101 are connected by a front cross bar 1031, and the lower ends of the two rear leg support parts 102 are connected by a rear cross bar 1032. The upper ends of the front leg support part 101 and the rear leg support part 102 located on the same side are connected via a folding member 104, and the folding member 104 can control the folding and unfolding of the front leg support part 101 and the rear leg support part 102. The structure of the main frame 1 is not limited to such a structure. For example, in some embodiments, the front leg support part 101 and the rear leg support part 102 are fixedly connected to each other and do not have a folded state.

[0213] A support pipe 11 is disposed on the upper part of the corresponding front leg support portion 101, and the support pipe 11 is configured to be connected to the swing bracket assembly 2. Refer to FIGS. 1 and 2. As shown in FIG. 4, in the first embodiment, the support pipe 11 extends upward with respect to the upper end of the front leg support portion 101, and the extending direction of the support pipe 11 is the same as the extending direction of the front leg support portion 101. In some embodiments, the support pipe 11 and the front leg support portion 101 are of an integral structure, or the support pipe 11 is sleeved on the tubular portion of the front leg support portion 101. When the support pipe 11 is sleeved on the tubular portion of the front leg support portion 101, the support pipe 11 is, for example, telescopic with respect to the front leg support portion 101, and a height adjustment structure configured to lock the position of the telescopic support pipe 11 with respect to the front leg support portion 101 is also disposed between the support pipe 11 and the front leg support portion 101. Thereby, the user can adjust the height of the seat 3 supported by the swing bracket assembly 2 as needed. For the height adjustment structure, related technologies can be referred to. Since the height adjustment structure is not the focus of the present invention, it will not be repeatedly described below. In the first embodiment, the support pipe 11 is installed at the upper end of the corresponding front leg support portion 101. However, in some embodiments, the support pipe 11 is not limited to being connected to the front leg support portion 101. According to the change in the structure of the main frame 1, the structure of the support pipe 11 and the position of the support pipe 11 in the main frame 1 can be appropriately changed as long as the support pipe 11 can be pivotally connected to the swing bracket assembly 2 to achieve the corresponding functions.

[0214] It should be noted that the terms indicating directions such as "front", "rear", "left", and "right" in the embodiments of the present invention refer to the "front", "rear", "left", and "right" of the baby sitting in the baby carrier, respectively, unless otherwise specified. The arrows H and P shown in the drawings indicate the "front" and "rear" directions, respectively, and the arrows L and R indicate the "left" and "right" directions, respectively. These terms indicating directions are only used to make the description of the embodiments of the present invention clearer and are not used to unduly limit the protection scope of the present invention.

[0215] FIG. 7 shows an example of the structure of the swing bracket assembly 2. The swing bracket assembly 2 is made of, for example, a metal rod and includes a support frame 22 and swing arms 21 disposed on both the left and right sides of the support frame 22, respectively. The support frame 22 has a bent structure. The support frame 22 includes, for example, a first support rod 221, a second support rod 222, a first cross bar 223, a second cross bar 224, and a third cross bar 225. The first support rod 221 and the second support rod 222 are arranged to face each other. In some embodiments, the first support rod 221 and the second support rod 222 are spaced apart on both the left and right sides, both extend in the front-rear direction, and are parallel to each other. The first cross bar 223 is connected between the rear ends of the first support rod 221 and the second support rod 222. The second cross bar 224 is connected to the front end of the first support rod 221 and the swing arm 21 on the right side. The third cross bar 225 is connected to the front end of the second support rod 222 and the swing arm 21 on the left side. The upper end of each swing arm 21 is pivotally connected to the corresponding support pipe 11, and the swing arm 21 can swing back and forth. In some embodiments, the swing bracket assembly 2 includes swing arms 21 respectively connected to the support pipes 11 disposed on both sides, and may have various structures as long as the seat 3 can be supported.

[0216] Referring to FIG. 1, the seat 3 is supported by the support frame 22 and is restricted in the left-right direction by the two swing arms 21. When the swing arms 21 swing back and forth, the seat 3 also swings together with the swing arms 21, and the baby carrier has a swing mode (also called a rocking chair mode).

[0217] Referring to FIGS. 1, 3, 23, and 24, an exemplary structure of the seat 3 in the first embodiment is shown. The seat 3 includes a base 305, two safety fences 306, a backrest 307, and a dinner plate 308 or a front armrest. The two safety fences 306 are disposed on both the left and right sides of the base 305. The backrest 307 is installed on the base 305 and is disposed between the two safety fences 306. The dinner plate 308 or the front armrest is installed on the two safety fences 306 and is disposed in front of the backrest 307. In some embodiments, a seat portion 3071 is further provided at the bottom of the backrest 307. For example, the seat portion 3071 and the backrest 307 are integrally formed and fixed on the base 305, whereby the backrest 307 is fixed on the base 305. The footrest 309 is disposed on the front surface of the base 305 and extends downward. The footrest 309 is configured to support the legs and feet of an infant. The upper end of the footrest 309 is pivotally connected to the seat portion 3071 via, for example, a pivot 3091. After removing the backrest 307, the seat portion 3071, and the footrest 309 from the base 305, the footrest 309 can be rotated toward the bottom of the seat portion 3071, thereby saving space. The structure of the seat 3 is not limited to the above example. For example, in some embodiments, the backrest 307 and the base 305 are integrally formed. Alternatively, the backrest 307 may be pivotally connected to the base 305. The seat 3 may be provided with a backrest adjustment and locking structure to realize the function of adjusting the inclination angle of the backrest 307. Alternatively, the footrest 309 may be directly connected to the base 305. Alternatively, in some embodiments, the footrest 309 is not disposed on the seat 3.

[0218] Referring to FIGS. 3 and 23, the seat 3 includes an attachment structure that engages with the swing bracket assembly 2. Specifically, as shown in FIG. 23, a first positioning groove 31 and a second positioning groove 32 are provided on the bottom surface of the base 305, and the first support rod 221 and the second support rod 222 are respectively locked in the first positioning groove 31 and the second positioning groove 32. Positioning grooves 331, 332, and 333 are provided on the bottom surface of the base 305, and the first cross bar 223, the second cross bar 224, and the third cross bar 225 are respectively locked in the positioning grooves 331, 332, and 333. As shown in FIG. 3, positioning grooves 3060 are provided on the outer surfaces of the two safety fences 306. The two swing arms 21 can be clamped in the positioning grooves 3060 on the respective side portions of the safety fence 306. In this way, the swing bracket assembly 2 forms a reliable support for the seat 3 in the front-rear direction and the left-right direction. Further, in order to easily lock or unlock the connection between the support frame 22 and the base 305, a quick release structure is arranged between the base 305 and the support frame 22. The quick release structure is, for example, the lock device 9 described later in the third and fourth embodiments, but the implementation of the quick release structure is not limited to the following examples. It is understood that the structure for connecting the seat 3 and the swing bracket assembly 2 can be implemented in various ways as long as the swing bracket assembly 2 can reliably support the seat 3.

[0219] Referring to FIGS. 6, 7, 9, and 11 to 13, a swing limiting mechanism 4 is disposed between the swing arm 21 and the support pipe 11. The swing limiting mechanism 4 is configured to limit the swing angle of the swing arm 21, thereby controlling the swing range of the seat 3 and realizing the riding safety and comfort of the seat 3 in the swing mode. In some embodiments, the swing angle of the swing arm 21 is within the range of 30 degrees to 40 degrees. Taking the swing angle of 40 degrees of the swing arm 21 as an example, the swing angle of 40 degrees means that the maximum angle α at which the swing arm 21 swings backward from the starting position is 20 degrees (shown in FIG. 11), and the maximum angle β at which the swing arm 21 swings forward from the starting position is 20 degrees (shown in FIG. 12). As shown in FIG. 13, the starting position of the swing arm 21 is, for example, a position where the swing arm 21 is substantially parallel to the center line of the support pipe 11.

[0220] FIGS. 6, 7, 9 to 13 show an example of the structure of the swing limiting mechanism 4 between the left swing arm 21 and the support pipe 11. In the first embodiment, the structures of the main frame 1 of the baby carrier and the support frame 22 are substantially symmetric about the left and right, respectively. The swing limiting mechanism 4 between the right swing arm 21 and the support pipe 11 is symmetric with the left swing limiting mechanism 4 and will not be repeatedly described below. Depending on the embodiment, the structures of the main frame 1 and the support frame 22 of the baby carrier may not be exactly symmetric about the left and right. In this case, the swing limiting mechanism 4 may be disposed only between the swing arm 21 and the support pipe 11 disposed on one side.

[0221] Referring to FIGS. 6, 7 and 9, a first through hole 110 penetrating the wall of the support pipe 11 of the main frame 1 in the lateral direction is provided in the support pipe 11, and the first through hole 110 is adjacent to the upper end of the support pipe 1. A fixing member 41 is provided in the swing motion restricting mechanism 4, and the fixing member 41 is inserted into the support pipe 11 in a sleeve shape and fixed to the main frame 1. For example, as shown in FIG. 6, a limiting flange 4109 is provided at the upper end of the fixing member 41, and the limiting flange 4109 is mounted on the upper end opening of the support pipe 11 to fix the fixing member 41 to the upper end of the support pipe 11. A second through hole 410 and a limiting groove 411 are provided in the fixing member 41. The second through hole 410 is aligned with the first through hole 110 in a row, and the limiting groove 411 extends in the longitudinal direction of the fixing member 41 and communicates with the second through hole 410. Note that, depending on the embodiment, the fixing member 41 may be fixed to the main frame 1 by other methods.

[0222] The pivot 211 is disposed at the upper end of the swing arm 21 and is non-rotatably connected to the swing arm 21. The pivot 211 is configured to pass through the first through hole 110 and the second through hole 410, and the axis of the pivot 211 is substantially perpendicular to the extending direction of the limiting groove 411. When a swinging force acts on the swing arm 21, the swing arm 21 swings about the axis of the pivot 211 together with the pivot 211. In the first embodiment, the swing arm 21 and the pivot 211 are integrally formed. In some embodiments, the pivot 211 and the swing arm 21 are integrally formed by, for example, welding. Alternatively, the pivot 211 and the swing arm 21 have a separate structure and are connected to each other by, for example, a flat head connection portion that engages with a flat hole.

[0223] Referring to FIGS. 11 to 13, the side walls of the limiting groove 411 include a first side wall 401 and a second side wall 402 that are parallel to each other, and the first side wall 401 and the second side wall 402 are respectively located on the front side and the rear side of the pivot 211. The first side wall 401 and the second side wall 402 respectively form a first limiting surface 4111 and a second limiting surface 4112. The first limiting surface 4111 of the first side wall 401 is located above the second limiting surface 4112 thereon, and the first limiting surface 4111 of the second side wall 402 is located below the second limiting surface 4112 thereon.

[0224] Referring to FIGS. 6, 10 to 13, the swing limiting mechanism 4 further includes a contact member 42. The contact member 42 is non-rotatably connected to the pivot 211 and is disposed between the first limiting surfaces 4111 of the first side wall 401 and the second side wall 402 and between the second limiting surfaces 4112 of the first side wall 401 and the second side wall 402. The contact member 42 limits the swing angle of the swing arm 21 by contacting the first limiting surface 4111 and the second limiting surface 4112. In the first embodiment, the contact member 42 and the pivot 211 are of a separate structure. The contact member 42 is first inserted into the limiting groove 411 and then non-rotatably connected to the pivot 211. The contact member 42 has a substantially rhombic shape and includes a first pair of parallel planes 421 and a second pair of parallel planes 422. Referring to FIG. 11, when the swing arm 21 swings until it contacts the first limiting surface 4111, the first pair of parallel planes 421 prevents the swing arm 21 from continuing to swing in the first direction T1. Referring to FIG. 12, when the swing arm 21 swings until it contacts the second limiting surface 4112, the second pair of parallel planes 422 prevents the swing arm 21 from continuing to swing in the second direction T2. The first direction T1 is opposite to the second direction T2. In the first embodiment, the first direction T1 is more specifically the rearward direction, and the second direction T2 is more specifically the forward direction.

[0225] In the first embodiment, the first side wall 401 and the second side wall 402 are parallel to each other, and the contact member 42 has a substantially rhombic shape. However, in other embodiments, the first side wall 401, the second side wall 402, and the contact member 42 may have other embodiments. As long as the first side wall 401 and the second side wall 402 can engage with the contact member 42 to limit the swing angle of the swing arm 21 within a preset angle, it is not limited to the above example.

[0226] Figures 6, 7, and 10 show connection examples of the pivot 211 and the contact member 42. A first flat head portion 2111 is provided at an end of the pivot 211, and a first flat hole 423 that engages with the first flat head portion 2111 is provided in the contact member 42. A part of the first flat head portion 2111 located in the limiting groove 411 is configured to pass through the first flat hole 423, and the contact member 42 is non-rotatably connected to the pivot 211. In some embodiments, the cross-sectional shapes of the first flat head portion 2111 and the first flat hole 423 are rectangular, trapezoidal, elliptical, rectangular, etc. Referring to Figures 6 and 7, the cross-sectional shapes of the first flat head portion 2111 and the first flat hole 423 are rectangular, trapezoidal, elliptical, rectangular, etc. As shown in Figure 7, during installation, first, the contact member 42 is inserted into the limiting groove 411 from the groove opening 41101 at the upper part of the limiting groove 411. Next, the first flat head portion 2111 is inserted through the first through hole 110 and the second through hole 410 on one side of the limiting groove 411. After aligning the first flat head portion 2111 of the contact member 42 in a straight line, the first flat head portion 2111 is inserted through the first flat hole 423. As can be seen from Figure 13, in some embodiments, the limiting groove 411 has a closed groove bottom 41102, thereby preventing the contact member 42 from accidentally slipping into the support pipe 11 from the bottom of the limiting groove 411.

[0227] Referring to FIGS. 6, 7, and 10, the diameter of the pivot 211 is smaller than the diameters of the first through hole 110 and the second through hole 410. The first shaft sleeve 201 fits onto the outer circumference of the pivot 211. The first shaft sleeve 201 is disposed on one side of the limiting groove 411 and is at least sleeved in the second through hole 410 of the fixing member 41. The pivot 211 is supported by the first shaft sleeve 201 and is rotatable relative to the first shaft sleeve 201. The first shaft sleeve 201 is made of a wear-resistant material with a low coefficient of friction, such as a plastic material, to reduce the resistance during the swinging of the swing arm 21. In some embodiments, the first shaft sleeve 201 is not provided, and the pivot 211 is directly supported by, for example, the second through hole 410.

[0228] Referring to FIG. 6, a step 4108 is formed on the hole wall of the second through hole 410. The step 4108 limits the installation depth of the first shaft sleeve 201 in the second through hole 410 and is configured to prevent the first shaft sleeve 201 from contacting the contact member 42. In some embodiments, the first shaft sleeve 201 engages closely with the second through hole 410 to prevent the first shaft sleeve 201 from moving axially or rotating circumferentially relative to the second through hole 410. Referring to FIGS. 7 and 8, as shown in FIG. 10, in some embodiments, an axial guide groove 2011 is formed on the outer circumference of the first shaft sleeve 201, and an axial guide rib 4101 is disposed on the hole wall of the second through hole 410. The extending directions of the axial guide groove 2011 and the axial guide rib 4101 are parallel to the axis of the pivot 211. During installation, the axial guide groove 2011 and the axial guide rib 4101 move axially relative to each other and engage with each other to prevent the first shaft sleeve 201 from rotating circumferentially relative to the second through hole 410. It can be understood that in some embodiments, the positions of the axial guide groove 2011 on the outer circumference of the first shaft sleeve 201 and the axial guide rib 4101 on the hole wall of the second through hole 410 may be interchanged.

[0229] Referring to FIGS. 6, 7, 9, and 10, a first step 2102 is formed at the root of the first flat head portion 2111. When viewed from one side, the first step 2102 can prevent the abutting member 42 from moving axially with respect to the pivot 211. The first limiting structure 5 is disposed on the first flat head portion 2111. When viewed from the other side, the first limiting structure 5 prevents the abutting member 42 from moving axially with respect to the pivot 211, and prevents the abutting member 42 from moving along the first flat head portion 2111 or disengaging from the first flat head portion 2111.

[0230] Referring to FIGS. 6, 7, 9, and 10, an exemplary structure of the first limiting structure 5 in the first embodiment is also shown. The first limiting structure 5 includes a spring clip 51 and a first positioning sleeve 52 located on the opposite side of the limiting groove 411. The first positioning sleeve 52 is fitted to the first flat head portion 2111 and disposed in the second through hole 410. The second flat hole 521 is formed along the axial direction and is located at the center of the first positioning sleeve 52. The second flat hole 521 is configured to engage with the first flat head portion 2111, thereby avoiding rotation between the first positioning sleeve 52 and the first flat head portion 2111. The first positioning sleeve 52 also includes a radially penetrating groove 522. The radially penetrating groove 522 is configured to accommodate the spring clip 51 and intersects the second flat hole 521 perpendicularly. A first positioning recess 2101 is formed in the first flat head portion 2111. The spring clip 51 is configured to be inserted into the radially penetrating groove 522, engages with the first positioning recess 2101, fixes the axial position of the first positioning sleeve 52 on the first flat head portion 2111, and the abutting member 42 is clamped between the first step 2102 and the first positioning sleeve 52. Referring to FIG. 6, in some embodiments, the outer peripheral wall of the first positioning sleeve 52 is in contact with the hole wall of the second through hole 410. Therefore, the first positioning sleeve 52 can form an auxiliary support portion for the first flat head portion 2111.

[0231] Referring to FIG. 7, in some embodiments, one or more positioning holes 424 are formed in the end face of the abutting member 42 facing the first positioning sleeve 52. The positioning holes 424 may be blind holes or through holes. One or more positioning posts 523 are disposed on the end face of the first positioning sleeve 52 facing the abutting member 42. The positioning holes 424 engage with the positioning posts 523. Since the first positioning sleeve 52 and the first flat head portion 2111 are non-rotatably connected, the engagement of the positioning holes 424 with the positioning posts 523 further ensures the non-rotatable connection between the abutting member 42 and the first flat head portion 2111. Depending on the embodiment, the positions of the positioning holes 424 on the abutting member 42 and the positions of the positioning posts 523 on the first positioning sleeve 52 can be interchanged.

[0232] Referring to FIG. 7, the baby carrier may be provided with a first swing lock mechanism 6. The first swing lock mechanism 6 is configured to lock the swing of the swing arm 21, so that the seat 3 cannot swing, that is, the seat 3 is switched from the swing mode to the fixed mode. In the case of a baby dining chair, when the baby is eating, it is necessary to switch the seat 3 from the swing mode to the fixed mode. The first swing lock mechanism 6 can be implemented in various ways. Referring to FIG. 3, at least one lock hole 30 is formed in the side portion of the seat 3, and more specifically, it is formed in the safety fence 306 of the seat 3. Referring to FIG. 7, as shown in FIG. 5, the first swing lock mechanism 6 is installed on the main frame 1 and includes a lock pin 62 that can be retracted in the axial direction. The lock pin 62 is parallel to the pivot 211. When the lock pin 62 is controlled to be inserted into the lock hole 30, the swing of the swing arm 21 is locked, and the seat 3 is switched to the fixed mode. When a plurality of lock holes 30 are formed in the seat 3, the inclination degree of the seat 3 in the fixed mode can be changed by inserting the lock pin 62 into different lock holes 30. When it is necessary to switch the seat 3 to the swing mode, the lock pin 62 is controlled to retract from the corresponding lock hole 30, and the lock pin 62 no longer interferes with the swing of the swing arm 21. The swing arm 21 can swing the seat 3 within the angular range restricted by the swing restriction mechanism 4.

[0233] Referring to FIGS. 5, 7 to 9, and 11 to 13, a structural example of the first swing lock mechanism 6 in the first embodiment and an example of the mounting structure of the first swing lock mechanism 6 and the main frame 1 are shown. For the convenience of mounting the first swing lock mechanism 6, the main frame 1 is further provided with a first mounting housing 15, and the first swing lock mechanism 6 is mounted in the first mounting housing 15. The first mounting housing 15 is mounted on the main frame 1. More specifically, the first mounting housing 15 is mounted on the support pipe 11.

[0234] Referring to FIGS. 7 and 9, the first mounting housing 15 is formed by butting the first housing portion 151 and the second housing portion 152 together, and a first swing lock mechanism 6 is installed inside the first mounting housing 15.

[0235] The second housing portion 152 is farther away from the longitudinal center plane of the baby carrier (also referred to as the left - right symmetric center plane) than the first housing portion 151. The second housing portion 152 includes a first sleeve portion 150, and the first sleeve portion 150 fits onto the end of the support pipe 11. In some embodiments, as shown in FIG. 9, the support pipe 11 has a hole 1101, the first sleeve portion 150 has a hole 1501, and a fastener such as a screw passes through the hole 1501 and the hole 1101 in sequence to fix the second housing portion 152 to the support pipe 11. Referring to FIG. 10. As shown in FIG. 7, an operation button 154 is arranged on the second housing portion 152. The first end of the operation button 154 is hingedly coupled to the second housing portion 152 via a pin shaft 1541, and a mounting hole 1542 is provided at the second end of the operation button 154. The mounting hole 1542 is configured to be connected to the end of a cable (not shown). A restoring spring 153 is further arranged between the operation button 154 and the second housing portion 152. Under the action of force, the operation button 154 moves upward around the pin shaft 1541, compresses the restoring spring 153, and the second end of the operation button 154 drives the cable upward, and the upward movement of the cable realizes the corresponding function. For example, in some embodiments, the upward movement of the cable releases the locking relationship between the support pipe 11 and the front - leg support portion 101, and the support pipe 11 expands and contracts relative to the front - leg support portion 101, so that the height of the seat 3 can be adjusted. Since the technical features and functions related to the operation button 154 and the cable are not the focus of the present invention, the operation button 154 and the cable will not be repeatedly described below.

[0236] The first housing part 151 is fixed to the second housing part 152 by a screw (not shown). A third through hole 1503 is provided in the first housing part 151, and the lock pin 62 is configured to protrude from the third through hole 1503. Referring to FIGS. 7 and 9, the first swing lock mechanism 6 further includes a first release member 61 and a first elastic element 63. Referring to FIG. 5, the first elastic element 63 is disposed inside the first mounting housing 15, applies an elastic force to the lock pin 62, and is arranged to project the lock pin 62 outward and insert it into the corresponding lock hole 30. The first release member 61 is operatively connected to the lock pin 62 and retracts the lock pin 62, retracting the lock pin 62 from the corresponding lock hole 30.

[0237] In some embodiments, the first release member 61 can move back and forth relative to the first mounting housing 15 to enter a locked position or an unlocked position. The first housing part 151 and / or the second housing part 152 are provided with a structure 1521 for guiding the movement of the first release member 61. Referring to FIGS. 8, 11, and 12, when the first release member 61 is in the unlocked position, the first release member 61 drives the lock pin 62 to retract from the lock hole 30, and the swing arm 21 can swing back and forth. Referring to FIGS. 8 and 13, when the first release member 61 is in the locked position, the first elastic element 63 drives the lock pin 62 to extend outward and insert it into the lock hole 30.

[0238] Referring to FIGS. 7, 8, 11 to 13, in some embodiments, the first annular flange 620 is disposed at an intermediate portion of the lock pin 62, and the first annular flange 620 divides the lock pin 62 into a first portion 621 and a second portion 622. The first portion 621 is configured to extend outward and be inserted into the lock hole 30, and the first elastic element 63 fits onto the second portion 622. The second housing portion 152 includes a mounting hole 1520, and the second portion 622 is axially movable and disposed within the mounting hole 1520. Referring to FIG. 8, the first release member 61 includes a first elongated hole 611, and the first elongated hole 611 is a straight hole or a curved hole. A first stop boss 612 extending obliquely is formed on the hole wall of the first elongated hole 611. The first annular flange 620 is sandwiched between the first stop boss 612 and the first elastic element 63. When the first release member 61 moves to the unlock position, the first stop boss 612 pushes the first annular flange 620 to axially move the lock pin 62 until it retracts until the lock pin 62 exits the lock hole 30. When the first release member 61 moves to the lock position, the first stop boss 612 escapes to secure an axial space, the first elastic element 63 extends the lock pin 62 outward, and the lock pin 62 is inserted into the lock hole 30. The structure of the first release member 61 for controlling the axial expansion and contraction of the lock pin 62 is diverse and is not limited to the above example.

[0239] Referring to FIGS. 8, 11 to 13, to facilitate the operation of the first release member 61, the first release member 61 further includes a first push block 613 protruding from the first mounting housing 15. The first push block 613 makes it convenient to manually change the front and rear positions of the first release member 61. The first mounting housing 15 is provided with a first opening 1505 through which the first push block 613 can pass, and the first opening 1505 can also limit the movement of the first push block 613.

[0240] As shown in FIGS. 11 to 13, in some embodiments, the upper end of the support pipe 11 extends into the first mounting housing 15 through the first sleeve portion 150 of the first mounting housing 15, and the fixing member 41 disposed at the upper end of the support pipe 11 is also accommodated in the first mounting housing 15 accordingly. The first mounting housing 15 is provided with a second opening 1506 (shown in FIG. 9) through which the swing arm 21 can pass, and the second opening 1506 also helps to limit the swing angle of the swing arm 21.

[0241] This embodiment also provides a swing mechanism. The swing mechanism includes the above-mentioned fixing member 41, swing arm 21, and abutting member 42. As described in this embodiment, the fixing member 41 includes a first limiting surface 4111 and a second limiting surface 4112. The swing arm 21 includes a pivot 211 that is rotatable relative to the fixing member 41. The abutting member 42 is connected to the pivot 211 and is disposed between the first limiting surface 4111 and the second limiting surface 4112. When the swing arm 21 rotates, the abutting member 42 also rotates with the swing arm 21. When the boundary position of the swing is reached, the abutting member 42 abuts against the first limiting surface 4111 and the second limiting surface 4112 respectively, restricting the swing angle of the swing arm 21.

[0242] In some embodiments, as described above, the fixing member 41 includes a limiting groove 411, and the extending direction of the limiting groove 411 is perpendicular to the axial direction of the pivot 211. The first limiting surface 4111 and the second limiting surface 4112 are formed on the first side wall 401 and the second side wall 402 of the limiting groove 411 and are parallel to each other. The abutting member 42 is attached to the swing arm 21 and includes a first pair of parallel surfaces 421 and a second pair of parallel surfaces 422. The abutting member 42 restricts the range of the swing angle of the swing arm 21 by the first pair of parallel surfaces 421 and the second pair of parallel surfaces 422 that abut against different positions of the first side wall 401 and the second side wall 402.

[0243] The swing mechanism can be applied to any suitable product to limit the range of the swing angle of the swing arm 21.

[0244] Second Embodiment

[0245] Figures 14 to 21 exemplarily show a part of the structure of the baby carrier according to the second embodiment of the present invention. Similar to the first embodiment above, the baby carrier in the second embodiment will also be described by taking the baby dining chair as an example. The type of the baby carrier is not limited to the baby dining chair. The baby carrier includes a main frame 1, a swing bracket assembly 2, and a seat. It should be noted that the structure of the seat is not shown in Figures 14 to 21. When there is no contradiction, for the seat, reference can be made to the description of the structure of the seat 3 in the first embodiment above.

[0246] Referring to Figure 14, the structure of the main frame 1 in the second embodiment is similar to the structure of the main frame 1 in the first embodiment above. The main frame 1 includes two front leg support portions 101, two rear leg support portions 102, a front crossbar (not shown) connected between the two front leg support portions 101, a rear crossbar (not shown) connected between the two rear leg support portions 102, a folding member 104 connected between the front leg support portion 101 and the rear leg support portion 102 located on the same side, and support pipes 11 respectively arranged on the upper portions of the front leg support portions. For the interrelationship of these components, reference can be made to the description of the first embodiment above and will not be repeated below.

[0247] Referring to FIG. 16, the structure of the swing bracket assembly 2 of the second embodiment is similar to the structure of the swing bracket assembly 2 of the first embodiment. The swing bracket assembly 2 includes a support frame 22 and swing arms 21 respectively arranged on the left and right sides of the support frame 22. The support frame 22 may have a bent structure. For example, it includes a first support rod 221, a second support rod 222, a first cross bar 223, a second cross bar 224, and a third cross bar 225. For the interrelationship between these components and the engagement relationship between the swing bracket assembly 2 and the seat 3, reference can be made to the description of the first embodiment above, and it will not be repeated here. Each upper end of the swing arm 21 is pivotally connected to the corresponding support pipe 11, and the swing bracket assembly 2 can swing back and forth to swing the seat 3 back and forth.

[0248] Referring to FIGS. 15 to 17, FIG. 20, and FIG. 21, in the baby carrier of the second embodiment, the swing limiting mechanism 4 is arranged between the swing arm 21 and the support pipe 11 arranged on the same side, and has the same function as the swing limiting mechanism 4 of the first embodiment above. It is configured to limit the swing angle of the swing arm 21, thereby controlling the swing range of the seat 3 and realizing the riding safety and comfort of the seat 3 in the swing mode. For example, the swing limiting mechanism 4 limits the swing angle of the swing arm 21 to 30 degrees to 40 degrees. In the second embodiment, an exemplary structure of the swing limiting mechanism 4 arranged on the left side between the swing arm 21 and the support pipe 11 is shown. In the second embodiment, the structures of the main frame 1 and the support frame 22 of the baby carrier are substantially symmetric about the left and right. The swing limiting mechanism 4 between the swing arm 21 on the right side and the support pipe 11 is symmetric to the swing limiting mechanism 4 on the left side and will not be repeatedly described below. Depending on the embodiment, the structures of the main frame 1 and the support frame 22 of the baby carrier may not be exactly symmetric about the left and right. In this case, the swing limiting mechanism 4 may be arranged only between the swing arm 21 arranged on one side and the support pipe 11.

[0249] Refer to FIGS. 15 to 18. As shown in FIG. 17, a first through hole 110 penetrating the wall of the support pipe 11 in the lateral direction is provided in the support pipe 11 of the main frame 1, and the first through hole 110 is adjacent to the upper end of the support pipe 1. The swing limiting mechanism 4 includes a fixing member 41, and the fixing member 41 is inserted into the support pipe 11 in a sleeve shape and fixed to the main frame 1. For example, a limiting flange 4109 is provided at the upper end of the fixing member 41, and the limiting flange 4109 is attached to the upper end opening of the support pipe 11 to fix the fixing member 41 to the upper end of the support pipe 11. Here, the second through hole 410 is arranged in a line with the first through hole 110, the limiting groove 411 extends in the longitudinal direction along the fixing member 41, and communicates with the second through hole 410. It should be understood that in some embodiments, the fixing member 41 may be fixed to the main frame 1 by other methods.

[0250] Referring to FIGS. 16 and 17, the pivot 211 is arranged at the upper end of the swing arm 21, and the pivot 211 is non-rotatably connected to the swing arm 21. The pivot 211 is arranged to pass through the first through hole 110 and the second through hole 410, and the axis of the pivot 211 is substantially perpendicular to the extending direction of the limiting groove 411. When a swinging force acts on the swing arm 21, the swing arm 21 swings about the axis of the pivot 211 together with the pivot 211. In the second embodiment, the pivot 211 and the swing arm 21 have a separate structure. A flat head connection portion 2113 protrudes from the end face of the second end of the pivot 211, and a connecting piece 26 is provided at the upper end portion of the swing arm 21. A third flat hole 260 engaging with the flat head connection portion 2113 is provided in the connecting piece 26. The cross-sectional shapes of the flat head connection portion 2113 and the third flat hole 260 may be shapes such as a rectangle, a trapezoid, an ellipse, a rectangular shape, etc.

[0251] Referring to FIGS. 16, 20, and 21, a restricting member 43 is disposed within the restricting groove 411. More specifically, the restricting member 43 (e.g., a plate piece) is inserted into the restricting groove 411. The restricting member 43 is provided with an opening 430 through which the pivot 211 can pass, and a first restricting surface 4111 and a second restricting surface 4112 are formed on the wall of the opening 430. More specifically, a first hole portion 4301 is provided in the opening 430, and the first hole portion 4301 is, for example, a sector-shaped hole portion. The first hole portion 4301 is provided with a first wall 43011 and a second wall 43012, and the first wall 43011 and the second wall 43012 are respectively located on the front side and the rear side of the pivot 211. The first wall 43011 and the second wall 43012 respectively form the first restricting surface 4111 and the second restricting surface 4112.

[0252] Referring to FIG. 20, in the second embodiment, the first hole portion 4301 is formed by two opposed upper and lower sector-shaped sub-holes (not shown in the figure) that communicate with each other. The first wall 43011 of the first hole portion 4301 includes the front walls of the upper and lower sector-shaped sub-holes, and the second wall 43012 of the first hole portion 4301 includes the rear walls of the upper and lower sector-shaped sub-holes. The first restricting surface 4111 includes the front wall of the upper sector-shaped sub-hole and the rear wall of the lower sector-shaped sub-hole, and the second restricting surface 4112 includes the rear wall of the upper sector-shaped sub-hole and the front wall of the lower sector-shaped sub-hole.

[0253] Referring to FIGS. 16, 20, and 21, the swing limiting mechanism 4 further includes a contact member 42. The contact member 42 is non-rotatably connected to the pivot 211 and is disposed between a first limiting surface 4111 and a second limiting surface 4112. The contact member 42 contacts the first limiting surface 4111 and the second limiting surface 4112 to limit the swing angle of the swing arm 21. In the second embodiment, the contact member 42 and the pivot 211 are integrally formed. More specifically, the contact member 4 is a second flat head portion formed on the pivot 211, and the second flat head portion is adjacent to the first end of the pivot 211 and includes a first plane 425 and a second plane 426 that are parallel to each other. The first end of the pivot 211 is the end of the pivot 211 away from the connecting piece 26.

[0254] Referring to FIG. 20, during the swing of the swing arm 21, when the upper part of the first plane 425 and the lower part of the second plane 426 simultaneously contact the first limiting surface 4111, the continuation of the swing of the swing arm 21 in the first direction T1 is stopped, and when the lower part of the first plane 425 and the upper part of the second plane 426 simultaneously contact the second limiting surface 4112, the continuation of the swing of the swing arm 21 in the second direction T2 is stopped.

[0255] Note that the opening 430 of the second embodiment includes a first hole portion 4301 formed by butting two fan-shaped sub-holes communicating with each other, and the contact member 42 is a second flat head portion formed on the pivot 211. In other embodiments, the opening 430 and the contact member 42 can also be provided in other embodiments as long as the hole wall of the opening 430 can limit the swing angle of the swing arm 21 within a predetermined angle, and is not limited to the above example. For example, in some embodiments, the first hole portion 4301 of the opening 430 includes only one fan-shaped sub-hole, and the front wall and the rear wall of the fan-shaped sub-hole form the first limiting surface 4111 and the second limiting surface 4112, respectively.

[0256] Refer to FIGS. 15 to 18. As shown in FIG. 17, the diameter of the pivot 211 is smaller than the diameters of the first through hole 110 and the second through hole 410. The second shaft sleeve 202 fits onto the outer periphery of the pivot 211. The second shaft sleeve 202 is disposed on one side of the limiting groove 411 and is at least sleeved in the second through hole 410 of the fixing member 41. The pivot 211 is supported by the second shaft sleeve 202 and is rotatable relative to the second shaft sleeve 202. The second shaft sleeve 202 is made of a wear-resistant material with a low coefficient of friction, such as a plastic material, to reduce the resistance during the swinging of the swing arm 21. In some embodiments, the second shaft sleeve 202 is firmly engaged with the second through hole 410 to prevent the second shaft sleeve 202 from moving axially or rotating circumferentially relative to the second through hole 410. The second shaft sleeve 202 is provided, and the pivot 211 is directly supported by, for example, the second through hole 410.

[0257] Referring to FIGS. 15 to 17, the pivot 211 is provided with a second limiting structure 7, and the second limiting structure 7 is configured to prevent the connecting piece 26, the pivot 211, and the limiting member 43 from separating from each other. The figure shows an exemplary connection between the pivot 211 and the second limiting structure 7. Specifically, the pivot 211 has a central hole 2110 (see FIG. 16), a second step 2103 (see FIG. 17) is formed at the root of the second flat head portion, and a third step 2105 (see FIG. 16) is formed at the root of the flat head connection portion 2113. The second limiting structure 7 includes a bolt 71 and a nut 72. The tail end 711 of the bolt 71 is inserted into the central hole 2110 from the second end of the pivot 211 (the end of the flat head connection portion 2113), exits from the central hole 2110 from the first end of the pivot 211, and is screwed into the nut 72. The nut 72 is disposed on the other side of the limiting groove 411 and is located within the second through hole 410. The connecting piece 26 is clamped between the third step 2105 and the head 712 of the bolt 71, the limiting member 43 is clamped between the second step 2103 and the nut 72, and the second shaft sleeve 202 is disposed between the connecting piece 26 and the limiting member 43.

[0258] Referring to FIGS. 15 to 17, the pivot 211 further includes a prism 2115 protruding from the end face of the second flat head portion, and the nut 72 forms a second positioning recess 720 that engages with the prism 2115. Since the prism 2115 engages with the second positioning recess 720, the nut 72 cannot rotate relative to the pivot 211, which is convenient for screwing the bolt 71 into the nut 72 or unscrewing it from the nut 72. In some embodiments, the outer peripheral wall of the nut 72 contacts the hole wall of the second through hole 410 to form an auxiliary support portion of the pivot 211.

[0259] In some embodiments, the baby carrier includes, in the first embodiment, the first swing lock mechanism 6, and the swing of the swing arm 21 is locked by the first swing lock mechanism 6, so that the seat 3 cannot swing and is in a fixed mode.

[0260] This second embodiment provides another embodiment for locking the swing of the swing arm 21. Referring to FIGS. 20 and 21, the limiting groove 411 includes a groove opening 41101 and a groove bottom 41102. The limiting member 43 is inserted into the limiting groove 411 through the groove opening 41101, and the limiting member 43 can move longitudinally within the limiting groove 411 to adjust its position. The limiting groove 411 has a closed groove bottom 41102 to prevent the limiting member 43 from accidentally slipping into the support pipe 11 through the bottom of the limiting groove 41. The opening 430 of the limiting member 43 further includes a second hole portion 4302 communicating with the first hole portion 4301. The second hole portion 4302 is, for example, a linear hole portion, and the linear hole portion includes, for example, two opposing parallel hole walls. The second hole portion 4302 is located below the first hole portion 4301 and is close to the groove bottom 41102, and the first hole portion 4301 is close to the groove opening 41101. As shown in FIG. 21, by moving the limiting member 43 toward the groove opening 41101, a part of the second flat head portion is inserted from the first hole portion 4301 into the second hole portion 4302, and the first plane 425 and the second plane 426 of the second flat head portion abut against the hole walls on both sides of the second hole portion 4302, that is, the second flat head portion engages with the second hole portion 4302, thereby restricting the swing of the swing arm 21. Referring to FIG. 21, in some embodiments, two limiting portions 4307 are formed at the joint of the two sector-shaped sub-holes. By appropriately designing the depth of the second hole portion 4302, when the second flat head portion engages with the second hole portion 4302, a part of the second flat head portion is sandwiched between the two limiting portions 4307, so the two limiting portions 4307 also have a limiting effect on the second flat head portion. Conversely, as shown in FIG. 20, when the limiting member 43 is moved toward the groove bottom 41102 so that the second flat head portion is completely positioned in the first hole portion 4301, the swing arm 21 can swing back and forth.

[0261] Note that, depending on the embodiment, the position above the first hole portion 4301 and the position below the second hole portion 4302 may be interchanged. In this case, when the restricting member 43 moves toward the groove opening 41101 and the second flat head portion is completely positioned within the first hole portion 4301, the swing arm 21 can swing back and forth. Conversely, when the restricting member 43 moves toward the groove bottom 41102, at least a part of the second flat head portion is inserted from the first hole portion 4301 into the second hole portion 4302, and the swing of the swing arm 21 is locked.

[0262] Refer to FIGS. 20 and 21. As shown in FIG. 21, in the second embodiment, the second elastic element 45 is disposed within the restricting groove 411 and is sandwiched between the restricting member 43 and the groove bottom 41102, exerting an upward force on the restricting member 43 to move the restricting member 43 toward the groove opening 41101. To facilitate the positioning of the second elastic element 45, a cylindrical guide portion 4115 is formed in the restricting groove 411. Further, a receiving recess 4309 is provided in the restricting member 43, and the upper end of the second elastic element 45 is received in the receiving recess 4309. When a pressing force is applied to the restricting member 43, the restricting member 43 overcomes the elastic force of the second elastic element 45 and moves toward the groove bottom 41102. In this way, by moving the restricting member 43 up and down within the restricting groove 411, the first hole portion 4301 and the second hole portion 4302 selectively engage with the second flat head portion. As can be understood from the above description, when the second flat head portion engages with the first hole portion 4301, the swing arm 21 can swing back and forth, and when at least a part of the second flat head portion engages with the second hole portion 4302, the swing of the swing arm 21 is locked.

[0263] Referring to FIGS. 16 to 21, to apply pressure to the restricting member 43 toward the groove bottom 41102, the second embodiment further includes a second swing lock mechanism 8. The second swing lock mechanism 8 is operatively connected to the restricting member 43 and applies pressure to the restricting member 43 toward the groove bottom 41102, causing the restricting member 43 to overcome the action of the second elastic element 45 and move toward the groove bottom 41102.

[0264] Referring to FIGS. 15 to 21, a structural example of the second swing lock mechanism 8 in the second embodiment and an attachment structure example of the second swing lock mechanism 8 and the main frame 1 are shown. For convenience of attachment of the second swing lock mechanism 8, a second attachment housing 16 is further provided in the baby carrier, and the second swing lock mechanism 8 is attached within the second attachment housing 16. The second attachment housing 16 is attached on the main frame 1. More specifically, the second attachment housing 16 is attached on the support pipe 11.

[0265] Referring to FIGS. 15 and 16, the second attachment housing 16 is formed by butting a third housing portion 161 and a fourth housing portion 162, and the second swing lock mechanism 8 is installed inside the second attachment housing 16.

[0266] The fourth housing part 152 is farther away from the longitudinal center plane of the baby carrier (also referred to as the left-right symmetric center plane) than the third housing part 161. The fourth housing part 162 includes a second sleeve part 160, and the second sleeve part 160 is fitted to the end of the support pipe 11. Referring to FIG. 17, in some embodiments, the support pipe 11 is provided with a hole 1101, the second sleeve part 160 is provided with a hole 1601, and a fastener such as a screw passes through the hole 1601 and the hole 1101 in sequence to fix the fourth housing part 162 to the support pipe 11. Referring to FIGS. 14 and 15, as shown in FIG. 16, an operation button 164 is disposed on the fourth housing part 162. The first end of the operation button 164 is hinged to the fourth housing part 162 via a pin shaft 1641, and a mounting hole 1642 is provided at the second end of the operation button 164. The mounting hole 1642 is configured to be connected to the end of a cable (not shown). A restoring spring 163 is further disposed between the operation button 164 and the fourth housing part 162. Due to the action of force, the operation button 164 moves upward about the pin shaft 1641, compresses the restoring spring 163, and the second end of the operation button 164 drives the cable upward, and the corresponding function is realized by the upward movement of the cable. For example, in some embodiments, due to the upward movement of the cable, the locking relationship between the support pipe 11 and the front leg support part 101 is released, and the support pipe 11 expands and contracts relative to the front leg support part 101, so that the height of the seat 3 can be adjusted. Since the technical features and functions related to the operation button 164 and the cable are not the focus of the present invention, the operation button 164 and the cable will not be repeatedly described below.

[0267] The third housing part 161 may be fixed to the fourth housing part 162 by a screw (not shown). Referring to FIGS. 16, 18 to 21, a clamp part 431 is disposed on the upper part of the restricting member 43 close to the groove opening 41101. The clamp part 431 is, for example, a recess. The second swing lock mechanism 8 includes a second releasing member 81, a first connecting member 82, and an engaging member 83. A central hole 830 is provided in the engaging member 83. Inside the second mounting housing 16, a rotating shaft 169 (see FIG. 16) is disposed. The engaging member 83 is fitted to the rotating shaft 169 through the central hole 830. The rotating shaft 169 is parallel to the pivot 211. On the outer periphery of the engaging member 83, a connecting protrusion 831, an engaging boss 832, and an avoiding part 833 are disposed. The first connecting member 82 is connected between the connecting protrusion 831 and the second releasing member 81. The second releasing member 81 rotationally drives the engaging member 83 via the first connecting member 82, and the engaging boss 832 and the avoiding part 833 also rotate accordingly. Refer to the drawings. Referring to FIG. 20, when the engaging boss 832 rotates to a position where it abuts against the clamp part 431, the restricting member 43 moves toward the groove bottom 41102, the second flat head part engages with the first hole part 4301, and the swing arm 21 can swing back and forth. Referring to FIG. 21, when the avoiding part 833 rotates to a position where it abuts against the upper part of the restricting member 43, the restricting member 43 moves toward the groove opening 41101 due to the action of the second elastic element 45, the second flat head part engages with the second hole part 4302, and the swing of the swing arm 21 is locked.

[0268] In the second embodiment, the second release member 81 moves back and forth between a locked position and an unlocked position with respect to the second mounting housing 16, and the third housing portion 161 and / or the fourth housing portion 162 are provided with a structure 1621 for guiding the movement of the second release member 81. Referring to FIGS. 18 and 20, when the second release member 81 retracts to the unlocked position, the first connecting member 82 rotates the engaging member 83, the engaging boss 832 contacts the clamp portion 431, the restricting member 43 moves downward, the second flat head portion engages with the first hole portion 4301, and the swing arm 21 swings back and forth. Referring to FIGS. 19 and 20, as shown in FIG. 21, when the second release member 81 moves forward to the locked position, the engaging boss 832 disengages from the clamp portion 431, the avoiding portion 833 faces the restricting member 43 and allows the restricting member 43 to move upward, and the second flat head portion engages with the second hole portion 4302 to lock the swing of the swing arm 21.

[0269] Referring to FIGS. 16 and 17, the second embodiment shows an exemplary connection among the first connecting member 82, the second release member 81, and the engaging member 83. More specifically, the first connecting member 82 has a curved shape, a first connecting pin 821 is disposed at a first end of the first connecting member 82, and the second release member 81 includes a second elongated hole 811 with which the first connecting pin 821 slidably engages. In some embodiments, the positions of the first connecting pin 821 on the first connecting member 82 and the second elongated hole 811 on the second release member 81 may be interchanged. A third elongated hole 822 is provided at a second end of the first connecting member 82, and a second connecting pin 8311 is provided on the connecting protrusion 831. The second connecting pin 8311 slidably engages with the third elongated hole 822. Depending on the embodiment, the positions of the second connecting pin 8311 on the connecting protrusion 831 and the third elongated hole 822 within the first connecting member 82 may be interchanged.

[0270] Referring to FIGS. 18 and 19, in order to easily operate the second release member 81, the second release member 81 is provided with a second push block 812 that protrudes with respect to the second mounting housing 16. The second push block 812 makes it convenient to manually change the front - rear position of the second release member 81. Correspondingly, the second mounting housing 16 is provided with a third opening 1605 through which the second push block 812 can move, and the third opening 1605 can also limit the movement of the second push block 812.

[0271] As shown in FIGS. 15 and 16, in some embodiments, the upper end of the support pipe 11 extends into the second mounting housing 16 through the second sleeve portion 160 of the second mounting housing 16, and the fixing member 41 disposed at the upper end of the support pipe 11 is also correspondingly accommodated in the second mounting housing 16. The second mounting housing 16 is provided with a fourth opening 1606 through which the swing arm 21 can pass, and the fourth opening 1606 also helps to limit the swing angle of the swing arm 21.

[0272] In the first and second embodiments, the fixing member 41 is disposed inside the support pipe 11. However, in other embodiments, the fixing member 41 may not be disposed inside the support pipe 11. For example, the fixing member 41 is fixed outside the support pipe 11, the pivot 211 is pivotally connected to the fixing member 41 outside the support pipe 11, and it is not necessary for the support pipe 11 to be provided with the first through - hole 110 described above.

[0273] This embodiment is also provided with a swing mechanism. The swing mechanism is composed of a fixing member 41, a swing arm 21, and a contact member 42. Hereinafter, the description will focus on the differences between the swing mechanism of this embodiment and the swing mechanism of the first embodiment, and the same or similar points will not be repeatedly described.

[0274] The limiting member 43 is disposed within the limiting groove 411. More specifically, the limiting member 43 is, for example, a plate piece inserted into the limiting groove 411 of the fixing member 41, and the position of the limiting member 43 within the limiting groove 411 is adjustable. The limiting member 43 is provided with an opening 430 through which the pivot 211 can pass, and the opening 430 is provided with a first hole portion 4301 and a second hole portion 4302. The first hole portion 4301 is formed, for example, by butting two fan-shaped sub-holes. The first hole portion 4301 includes a first wall 43011 and a second wall 43012, and a first limiting surface 4111 and a second limiting surface 4112 are formed on the first wall 43011 and the second wall 43012. The second hole portion 4302 is configured to engage with the abutting member 42 to lock the swing arm.

[0275] The swing mechanism restricts the limit swing position (i.e., the swing angle range) of the swing arm 21 by the first hole portion 4301 that engages with the abutting member 42 by adjusting the position of the limiting member 43 within the limiting groove 411, and locks the swing arm 21 by the second hole portion 4302 that engages with the abutting member 42.

[0276] Further, the swing mechanism is provided with a second swing lock mechanism 8 and a second elastic member 45, and the position of the limiting member 43 within the limiting groove 411 can be adjusted.

[0277] The swing mechanism not only enables the swing arm 21 to swing within a preset angle range, but also can lock the swing arm 21 to stop the swing of the swing arm 21.

[0278] The Third Embodiment

[0279] Figs. 22 to 27 exemplarily show a sheet connection structure according to the third embodiment of the present invention, and this sheet connection structure is applied to a baby carrier. In the third embodiment, taking the sheet connection structure applied to the baby dining chair shown in the first and second embodiments as an example, the sheet connection structure will be described. It should be understood that the application range of the sheet connection structure is not limited to the baby dining chair, and also includes other types of baby carriers and other structures that require rapid disassembly of the sheet.

[0280] Referring to Figs. 22 and 23, the sheet connection structure includes a support frame 22, a first positioning groove 31 and a second positioning groove 32, and a locking device 9. The first positioning groove 31 and the second positioning groove 32 are formed on the first surface of the sheet 3. The support frame 22 includes a first support rod 221 and a second support rod 222 that are oppositely arranged. Referring to the foregoing description of the first embodiment, the first support rod 221 and the second support rod 222 each extend in the front-rear direction. Further, the support frame 22 further includes at least one cross bar, and the at least one cross bar includes, for example, a first cross bar 223, a second cross bar 224 and a third cross bar 225.

[0281] Referring to Fig. 23, on the first surface of the sheet 3, more specifically, on the bottom surface of the base 305, a first positioning groove 31 and a second positioning groove 32 are provided. The first positioning groove 31 is configured to accommodate the first support rod 221, and the second positioning groove 32 is configured to accommodate the second support rod 222. When the first support rod 221 and the second support rod 222 are respectively locked in the first positioning groove 31 and the second positioning groove 32, the sheet 3 is supported and the sheet 3 is restricted from moving in the left-right direction with respect to the support frame 22.

[0282] On the bottom surface of the seat 3, positioning grooves for accommodating at least one crossbar are further provided. For example, on the bottom surface of the base 305, a third positioning groove 331, a fourth positioning groove 332, and a fifth positioning groove 333 are also provided. The first crossbar 223, the second crossbar 224, and the third crossbar 225 are locked in the third positioning groove 331, the fourth positioning groove 332, and the fifth positioning groove 333, respectively. When these crossbars are locked in the corresponding positioning grooves, on the one hand, the seat 3 can be supported, and on the other hand, the seat 3 can be restricted from moving in the front-rear direction relative to the support frame 22. To facilitate the installation of each support rod and each crossbar, the first positioning groove 31, the second positioning groove 32, the third positioning groove 331, the fourth positioning groove 332, and the fifth positioning groove 333 communicate with each other. It should be understood that the front-rear movement of the seat 3 relative to the support frame 22 is not limited to the combination of the above-mentioned crossbars and positioning grooves and can be restricted in various ways.

[0283] In the first embodiment and the second embodiment, both ends of the support frame 22 are connected to the main frame 1 via the swing arms 21 so that the seat 3 has a swing mode. However, it should be noted that in some embodiments, the support frame 22 is directly or indirectly fixed to the main frame 1, for example, and the seat 3 does not have a swing mode. Also, in some embodiments, the first support rod 221 and the second support rod 222 do not extend in the front-rear direction but extend in the left-right direction. In this case, when the first support rod 221 and the second support rod 222 are locked in the first positioning groove 31 and the second positioning groove 32, respectively, the front-rear movement of the seat 3 relative to the support frame 22 is restricted, and the left-right movement of the seat 3 may be achieved by other appropriate structures.

[0284] Referring to FIGS. 22 and 23, on the second surface opposite to the first surface of the sheet 3, for example, the upper surface of the sheet 3, more specifically, the upper surface of the base 305, a first slide groove 33 and a second slide groove 34 are provided. The extending direction of the first slide groove 33 is substantially perpendicular and intersects with the extending direction of the first positioning groove 31, and the extending direction of the second slide groove 34 is substantially perpendicular and intersects with the extending direction of the second positioning groove 32.

[0285] Referring to FIGS. 22 and 23, the locking device 9 includes a first block member 91, a second block member 92, and an elastic element 93. Both the first block member 91 and the second block member 92 are slidably engaged with the sheet 3. For example, the first block member 91 is slidably disposed in the first slide groove 33, and the second block member 92 is slidably disposed in the second slide groove 34. The elastic element is configured to drive the first block member 91 to a locked position. In this case, the first block member 91 is disposed under the first support rod 221 to prevent the first support rod 221 from disengaging from the first positioning groove 31, that is, the first support rod 221 is locked between the first block member 91 and the sheet 3. The elastic element is also configured to drive the second block member 92 to a locked position. In this case, the second block member 92 is configured to prevent the second support rod 222 from disengaging from the second positioning groove 32. The second support rod 222 is fixed between the second block member 92 and the sheet 3. In this way, when the locking device 9 is in the locked state, the first block member 91 and the second block member 92 lock the connection relationship between the first support rod 221, the second support rod 222 and the sheet 3. In some embodiments, the first block member 91 and the second block member 92 are separately arranged or connected together.

[0286] Depending on the connection relationship between the first blocking member 91 and the second blocking member 92, the elastic element 93 may include one or more springs. For example, when the first blocking member 91 and the second blocking member 92 are arranged separately, the elastic element includes one spring for driving the first blocking member 91 and another spring for driving the second blocking member 92. In the third embodiment, the first blocking member 91 and the second blocking member 92 are connected. In this case, the elastic element includes one spring, and the spring acts on the first blocking member 91 and the second blocking member simultaneously.

[0287] Referring to FIGS. 24 to 27, when it is necessary to remove the seat 3 from the support frame 22, the first blocking member 91 and the second blocking member 92 are driven to move in the opening direction N, and the first blocking member 91 and the second blocking member 92 simultaneously exit from the first positioning groove 31 and the second positioning groove 32, and the locking device 9 switches to the unlocked state shown in FIGS. 26 and 27. At this time, the seat 3 is lifted and can be easily removed from the support frame 22.

[0288] When it is necessary to install the seat 3 on the support frame 22, due to the action of an external force, the locking device 9 switches to the unlocked state, the first support rod 221 is locked in the first positioning groove 31, the second support rod 222 is locked in the second positioning groove 32, and finally the external force is removed, and the elastic element 93 automatically drives the first blocking member 91 and the second blocking member 92 to be inserted into the first positioning groove 31 and the second positioning groove 32, and the first blocking member 91 and the second blocking member 92 move to the locking position. As described above, in this case, the locking device 9 switches to the locked state shown in FIGS. 24 and 25, and the seat 3 is locked on the support frame 22. The seat connection structure provided in the third embodiment has a simple structure and enables rapid disassembly or assembly of the seat 3 and the support frame 22.

[0289] FIG. 23 shows an embodiment in which the first blocking member 91 and the second blocking member 92 are integrally connected. More specifically, the first blocking member 91 and the second blocking member 92 are integrally connected by a connection bracket 94. To accommodate the connection bracket 94, a third slide groove 35 is also provided on the upper surface of the sheet 3, and the first slide groove 33 and the second slide groove 34 communicate with each other through the third slide groove 35. The groove depth of the third slide groove 35 is shallower than the groove depth of the first slide groove 33 and the groove depth of the second slide groove 34. The connection bracket 94 is disposed in the third slide groove 35, and first surfaces 941 and second surfaces 942 that are bent downward with respect to the connection bracket 94 are provided at both ends of the connection bracket 94, respectively. The first blocking member 91 is connected to the first surface 941, and the second blocking member 92 is connected to the second surface 942. The first blocking member 91 and the second blocking member 92 are bent in the same direction. In an embodiment not shown, the elastic element 93 includes at least one spring disposed in the first slide groove 33 and / or the second slide groove 34, and the at least one spring abuts against the first surface 941 and / or the second surface 942 to maintain the locking device 9 in a locked state.

[0290] Referring to FIG. 22, the connection bracket 94 is provided with a mounting hole 940, and a fastener 945 is mounted in the mounting hole 940. The fastener 945 is, for example, a bolt. A fourth elongated hole 351 is provided in the bottom wall of the third slide groove 35, and the fastener 945 is slidably engaged with the fourth elongated hole 351. The first end portion (threaded end portion) of the fastener 945 is configured to pass through the mounting hole 940 and the fourth elongated hole 351 in sequence and extend downward. When it is necessary to remove the sheet 3 from the support frame 22, when the fastener 945 is manually pushed along the opening direction N (shown in FIG. 25), the fastener 945 moves along the fourth elongated hole 351, and the connection bracket 94 also moves simultaneously, so that the first blocking member 91 and the second blocking member 92 simultaneously exit from the first positioning groove 31 and the second positioning groove 32.

[0291] Referring to FIGS. 1 and 22 together, in the third embodiment, the first slide groove 33, the second slide groove 34, and the third slide groove 35 are covered by the sheet portion 3071, thereby preventing foreign objects from entering and interfering with the movement of the connection bracket 94. Of course, depending on the embodiment, the first slide groove 33, the second slide groove 34, and the third slide groove 35 may be covered by any suitable structure.

[0292] Referring to FIGS. 25 and 27, in order to facilitate the unlocking operation of the locking device 9, the first end portion of the fastener 945 is connected to the third release member 95. For example, as shown in FIG. 22, the third release member 95 is connected to the first end portion of the fastener 945 via the screw hole 950. The third release member 95 may have a relatively large volume, whereby the user can easily operate it. Further, the bottom surface of the seat 3 also includes a fourth slide groove 36, and the fourth slide groove 36 and the third slide groove 35 are adjacent to each other in the extending direction of the fastener 945, and the fourth slide groove 36 is disposed between the first slide groove 33 and the second slide groove 34. As can be seen from the figure, the fourth slide groove 36 is located below the third slide groove 35. The third release member 95 is received in the fourth slide groove 36.

[0293] Referring to FIGS. 25 and 27, the elastic element 93 of the third embodiment is a spring installed in the fourth slide groove 36, and the spring is sandwiched between the side wall of the fourth slide groove 36 and the third release member 95, making the structure more compact. More specifically, as shown in FIG. 22, a first receiving groove 951 is provided at the first end portion of the third release member 95, and the first receiving groove 951 is configured to receive the end portion of the elastic element 93. Also, a pressing recess 952 convenient for manual pressing may be provided at the end portion of the third release member 95.

[0294] Referring to FIGS. 24 and 26, a part of the region of the fourth slide groove 36 may be covered by a shield plate 361, and the shield plate 361 is configured to shield the elastic element 93, preventing foreign matter from interfering with the normal operation of the elastic element 93.

[0295] Fourth Embodiment

[0296] FIGS. 28 to 29 exemplarily show a sheet connection structure according to the fourth embodiment of the present invention. The difference between the sheet connection structure provided in the fourth embodiment and the sheet connection structure provided in the third embodiment described above lies in the mounting of the locking device 9. When there is no contradiction, for the components and the connection relationships between the components in this embodiment, reference can be made to the description of the third embodiment above.

[0297] Referring to FIG. 28, in the fourth embodiment, the first blocking member 91 and the second blocking member 92 of the locking device 9 are not integrally connected, but are separated from each other. The first slide groove 33 and the second slide groove 34 for installing the first blocking member 91 and the second blocking member 92 are formed in the main groove 304, and the groove depth of the main groove 304 is constant. When the first positioning groove 31 and the second positioning groove 32 extend in the front-rear direction, the main groove 304 extends in the left-right direction, and the extending direction of the main groove 304 is substantially orthogonal to the extending directions of the first positioning groove 31 and the second positioning groove 32. The first blocking member 91 and the second blocking member 92 are slidably engaged with the main groove 304. When a thrust force in the opening direction N (shown in FIG. 31) acts on the first blocking member 91 and the second blocking member 92, the first blocking member 91 and the second blocking member 92 move in a direction approaching each other, and the locking device 9 switches to the unlocked state shown in FIGS. 32 and 33. The elastic element 93 includes a first spring 931 and a second spring 932. The first spring 931 and the second spring 932 are arranged at intervals in the front-rear direction and are respectively sandwiched between the first blocking member 91 and the second blocking member 92. The first spring 931 and the second spring 932 are configured to drive the first blocking member 91 and the second blocking member 92 to separate from each other, whereby the locking device 9 switches to the locked state shown in FIGS. 30 and 31. In some embodiments, one of the first spring 931 and the second spring 932 is selectively arranged between the first blocking member 91 and the second blocking member 92, and this also obtains the effect of driving the first blocking member 91 and the second blocking member 92 to separate from each other.

[0298] Referring to FIGS. 28 to 30, the locking device 9 also includes a second connecting member 96. The second connecting member 96 is disposed in the main groove 304 and is operatively connected to the first blocking member 91 and the second blocking member 92. When one of the first blocking member 91 and the second blocking member 92 is pushed and one of the first support rod 221 and the second support rod 222 is released, the second connecting member 96 causes the other of the first blocking member 91 and the second blocking member 92 to be pushed accordingly, and the other of the first support rod 221 and the second support rod 222 is synchronously released.

[0299] FIGS. 28 and 29 are diagrams showing an example of the structures of the second connecting member 96, the first blocking member 91, and the second blocking member 92.

[0300] The first end 901 of the first blocking member 91 and the first end 902 of the second blocking member 92 are separated from each other. The first end 901 of the first blocking member 91 and the first end 902 of the second blocking member 92 are configured to extend into the first positioning groove 31 and the second positioning groove 32 by the action of the elastic element 93. The first support rod 221 is fixed between the first blocking member 91 and the seat 3, and the second support rod 222 is fixed between the second blocking member 92 and the seat 3. In this way, the first blocking member 91 and the second blocking member 92 prevent the first support rod 221 and the second support rod 222 from disengaging from the first positioning groove 31 and the second positioning groove 32, and fix the connection relationship between the first support rod 221, the second support rod 222, and the seat 3. A first connection boss 911 is disposed at the second end of the first blocking member 91, and a second connection boss 921 is disposed at the second end of the second blocking member 92. The second end of the first blocking member 91 and the second end of the second blocking member 92 (not shown in the figure) are close to each other.

[0301] The second connecting member 96 is a rod, and an intermediate portion thereof is connected to a groove bottom of the main groove 304 via a pivot 963. A first end portion of the second connecting member 96 is pivotally connected to the first connection boss 911. For example, a first protruding post 961 is provided at the first end portion of the second connecting member 96, a fifth elongated hole 9111 is provided in the first connection boss 911, and the first protruding post 961 is slidably engaged with the fifth elongated hole 9111. A second end portion of the second connecting member 96 is pivotally connected to the second connection boss 921. For example, a second protruding post 962 is provided at the second end portion of the second connecting member 96, a sixth elongated hole 9211 is provided in the second connection boss 921, and the second protruding post 962 is slidably engaged with the sixth elongated hole 9211. In some embodiments, the positions of the first protruding post 961 on the second connecting member 96 and the fifth elongated hole 9111 on the first connection boss 911 may be interchanged, and the positions of the second protruding post 962 on the second connecting member 96 and the sixth elongated hole 9211 on the second connection boss 921 may also be interchanged. The structures of the second connecting member 96, the first blocking member 91, and the second blocking member 92 are not limited to the above examples.

[0302] Referring to FIGS. 30 and 32, the first spring 931 is disposed between the end of the first connection boss 911 and the second blocking member 92, and the second spring 932 is disposed between the end of the second connection boss 921 and the first blocking member 91. As shown in FIG. 29, a first positioning post 9113 is provided at the end of the first connection boss 911, and a second receiving groove 9213 located on the side opposite to the first positioning post 9113 is provided on the second blocking member 92. The first end of the first spring 931 is fitted to the first positioning post 9113, and the second end of the first spring 931 is configured to extend into the second receiving groove 9213, and the first spring 931 is firmly fixed between the first connection boss 911 and the second blocking member 92. Similarly, a second positioning post 9215 is provided at the end of the second connection boss 921, and a third receiving groove 9115 located on the side opposite to the second positioning post 9215 is provided on the first blocking member 91. The first end of the second spring 932 is fitted to the second positioning post 9215, and the second end of the second spring 932 is configured to extend into the second receiving groove 9213. By the third receiving groove 9115, the second spring 932 is firmly clamped between the second connection boss 921 and the first connection boss 911.

[0303] Referring to FIGS. 28 to 31, in order to save space, a first recess 9112 is formed on the bottom surface of the first connection boss 911, and the first recess 9112 is located below the fifth elongated hole 9111. The first end of the second connecting member 96 is received in the first recess 9112, and the first protruding post 961 is configured to pass through the first recess 9112 and enter the fifth elongated hole 911. The shape of the first recess 9112 is designed so as not to prevent the rotation of the second connecting member 96. For example, the first recess 9112 is triangular. A second recess 9212 is formed on the bottom surface of the second connection boss 921, and the second recess 9212 is located below the sixth elongated hole 9211. The second end of the second connecting member 96 is received in the second recess 9212, and the second protruding post 962 is configured to pass through the second recess 9212 and enter the sixth elongated hole 9211. The shape of the second recess 9212 is designed so as not to prevent the rotation of the second connecting member 96. For example, the second recess 9212 is triangular.

[0304] Referring to FIGS. 28 and 31, a first wedge 97 and a second wedge 98 are disposed on the side walls of the main groove 304. The first wedge 97 is located above the first blocking member 91 and abuts downwardly against the first blocking member 91. The second wedge 98 is located above the second blocking member 92 and abuts downwardly against the second blocking member 92. The first blocking member 91, the second connecting member 96, and the second blocking member 92 are constrained within the main groove 304.

[0305] Referring to FIGS. 1 and 28, in the fourth embodiment, since the main groove 304 is covered by the sheet portion 3071, it is possible to prevent foreign matter from entering and interfering with the movement of the locking device 9. In some embodiments, the main groove 304 may be covered by any suitable structure.

[0306] Referring to FIGS. 29, 31, and 32, bevels for pushing are provided at the first end portions 901 of the first blocking member 91 and the first end portions 902 of the second blocking member 92 which are separated from each other. Specifically, a first push bevel 9011 is provided at the first end portion 901 of the first blocking member 91, and a second push bevel 9021 is provided at the first end portion 902 of the second blocking member 92. On the one hand, the first push bevel 9011 and the second push bevel 9021 facilitate manually pushing the first blocking member 91 and the second blocking member 92 to release the locking device 9. On the other hand, when the seat 3 and the support frame 22 are installed together, the locking device 9 can be released without manual operation by the first support rod 221 and the second support rod 222 abutting against the first push bevel 9011 and the second push bevel 9021 respectively. As a result, the first support rod 221 and the second support rod 222 are easily locked in the first positioning groove 31 and the second positioning groove 32.

[0307] The present invention further provides a baby carrier, which may be a baby stroller, a baby dining chair, or any other carrier. The baby carrier includes a main frame 1, a swing bracket assembly 2, a seat 3, and the above-described seat connection structure. The swing bracket assembly 2 is connected to the seat 3 by the seat connection structure, and the support frame 22 is attached directly or indirectly to the main frame 1.

[0308] The fifth embodiment

[0309] Figures 34 to 54 schematically show the structure of a baby carrier according to the fifth embodiment of the present invention. Similar to the first and second embodiments, the baby carrier of the fifth embodiment will also be described by taking a baby dining chair as an example. The type of the baby carrier is not limited to the baby dining chair. Referring to FIGS. 34 and 37, the baby carrier includes, for example, a main frame 1, a swing bracket assembly 2, and a seat 3.

[0310] Referring to FIGS. 36 and 37, the structure of the main frame 1 of the fifth embodiment is similar to the structure of the main frame 1 of the first embodiment. The main frame 1 includes two front leg support portions 101, two rear leg support portions 102, a front cross bar 1031 connected between the two front leg support portions 101, a rear cross bar 1032 connected between the two rear leg support portions 102, a folding member 104 connected between the front leg support portion 101 and the rear leg support portion 102 on the same side, and support pipes 11 respectively disposed at the upper portions of the corresponding front leg support portions. For the interrelationship of these components, reference may be made to the description of the first embodiment, which will not be repeated here.

[0311] Referring to FIGS. 36, 37, and 49, in the fifth embodiment, the swing bracket assemblies 2 are respectively arranged on the left and right sides of the main frame 1, and the left and right sides of the seat 3 are connected to the main frame 1 via the corresponding swing bracket assemblies 2. In some embodiments, each swing bracket assembly 2 includes a swing arm 21 and an auxiliary swing arm 29. The auxiliary swing arm 29 is parallel to the swing arm 21, and the auxiliary swing arm 29 assists the swing arm 21 in supporting the seat 3. To facilitate the installation of the swing bracket assembly 2, the main frame 1 further includes a third mounting housing 17, and the third mounting housing 17 is installed on the main frame 1. More specifically, the third mounting housing 17 is attached to the support pipe 11, and the upper ends of the swing arm 21 and the auxiliary swing arm 29 are respectively pivotally connected to the third mounting housing 17.

[0312] Referring to FIG. 40, in some embodiments, the third mounting housing 17 is formed by butting a fifth housing portion 171 and a sixth housing portion 172. For example, the fifth housing portion 171 and the sixth housing portion 172 are joined and fixed with screws 179. The fifth housing portion 171 is closer to the longitudinal center plane of the baby carrier than the sixth housing portion 172. The sixth housing portion 172 has, for example, a third sleeve portion 170, and the third sleeve portion 170 fits onto the end of the support pipe 11. When there is no contradiction, for the connection mode between the support pipe 11 and the third sleeve portion 170, reference can be made to the connection mode between the first sleeve portion 150 and the support pipe 11 in the first embodiment. An operation button 174 (see FIG. 36) is provided on the sixth housing portion 172, and for the function of the operation button 174, reference can be made to the function of the operation button 154 in the first embodiment.

[0313] Referring to FIGS. 36 and 37, the upper ends of the swing arm 21 and the auxiliary swing arm 29 are pivotally connected to the third mounting housing 17 respectively, and the lower ends of the swing arm 21 and the auxiliary swing arm 29 are pivotally connected to the seat 3 respectively. The swing arm 21 and the auxiliary swing arm 29 that are parallel to each other form two opposite sides of a parallelogram. During swinging, the swing arm 21 and the auxiliary swing arm 29 drive the seat 3 to swing, and the seat 3 remains horizontal during swinging, providing a more comfortable and safe riding experience for the infant sitting on the seat 3. The seat 3 remains horizontal during swinging, whereby the swing angle range of the swing arm 21 and the auxiliary swing arm 29 is larger than the swing angle range illustrated in the above embodiments. For example, the maximum angle α at which the swing arm 21 and the auxiliary swing arm 29 swing backward with respect to the starting position (shown in FIG. 34, and the swing arm 21 and the auxiliary swing arm 29 in the starting position are substantially perpendicular to the ground) is greater than 20 degrees (shown in FIG. 36), for example 25 degrees or greater than 25 degrees. The maximum angle β at which the swing arm 21 and the auxiliary swing arm 29 swing forward is also greater than 20 degrees (shown in FIG. 35), for example 25 degrees or greater than 25 degrees.

[0314] Referring to FIG. 37, in order to facilitate the connection between each swing bracket assembly 2 and the seat 3, in some embodiments, each swing bracket assembly 2 further includes a connector 28. The following description is exemplified by the connection relationship between the left swing bracket assembly 2 and the seat 3. The structure of the right swing bracket assembly 2 is symmetrical to the structure of the left swing bracket assembly 2 and will not be repeatedly described below.

[0315] Referring to FIGS. 40, 45 and 53, the lower ends of the swing arm 21 and the auxiliary swing arm 29 are pivotally connected to the connector 28, respectively. For example, a pivot 219 is provided at the lower end of the swing arm 21, and a pivot 291 (shown in FIG. 53) is provided at the lower end of the auxiliary swing arm 29. The pivot 219 and the pivot 291 are parallel to each other, and the pivot 219 and the pivot 291 are inserted into corresponding mounting holes 2810 of the connector 28, respectively. The connector 28 is provided with a protrusion 280 extending upward, and a locking portion 281 is provided on the wall of the protrusion 280. The locking portion 281 is, for example, an elastic stopper block. Referring to FIGS. 40, 45 and 53, as shown in FIG. 50, a groove 3062 for accommodating the protrusion 280 is formed at the bottom of the seat 3, and a locking hole 30621 is formed on the wall of the groove 3062. Referring to FIG. 54, when it is necessary to connect the seat 3 and the swing bracket assembly 2, the protrusion 280 of the connector 28 is inserted into the groove 3062, and the locking portion 281 engages with the locking hole 30621.

[0316] The connection form between the connector 28 and the seat 3 is not limited to the above example. For example, in some embodiments, the positions of the locking portion 281 on the protrusion 280 and the locking hole 30621 on the seat 3 may be interchanged. In some embodiments, the connection between the connector 28 and the seat 3 may be a detachable connection or a non-detachable connection, and the connection between the swing arm 21 and the connector 28 and the connection between the auxiliary swing arm 29 and the connector 28 may be detachable connections or non-detachable connections, respectively. Also, in the above embodiments, the swing arm 21 and the auxiliary swing arm 29 are connected to the seat 3 via the connector 28. However, it should be noted that in some embodiments, the swing arm 21 and the auxiliary swing arm 29 are directly and pivotally connected to the seat 3, respectively.

[0317] Figures 40 and 53 show an example of the connection structure between the auxiliary swing arm 29 and the third mounting housing 17. A pivot 292 is provided at the upper end of the auxiliary swing arm 29, and the pivot 292 and the pivot 291 are parallel to each other. After passing through the hole 1703 of the fifth housing portion 171, the pivot 292 is inserted into the hole socket 1721 of the sixth housing portion 172. The shaft sleeve 293 is fitted to the pivot 292 and fixed to the pivot 292 by, for example, a fastener 295. The shaft sleeve 293 is made of a wear-resistant material with a low coefficient of friction and can reduce the friction between the pivot 292 and the third mounting housing 17. The shaft sleeve 293 engages with the chamber of the third mounting housing 17 to limit the axial position of the pivot 292.

[0318] Referring to FIGS. 36 and 50, an exemplary structure of the seat 3 is shown. The structure of the seat 3 is the same as the structure of the seat 3 in the first embodiment. The seat 3 includes a base 305, two safety fences 306, a backrest 307, a dinner plate 308 or a front armrest, and a footrest 309. When there is no contradiction, for the connection relationship between these components of the seat 3, reference can be made to the structure of the seat 3 in the first embodiment, and it will not be repeatedly described below.

[0319] In some embodiments, the swing restriction mechanism 4 (shown in FIG. 40) is disposed between at least one of the swing arms 21 and the main frame 1. The swing restriction mechanism 4 is configured to limit the swing angle of the swing arm 21, thereby controlling the swing range of the seat 3 and realizing the riding safety and comfort of the seat 3 in the swing mode. Referring to FIGS. 36, 38 to 40, in the fifth embodiment, two swing restriction mechanisms 4 are disposed on the left and right sides between the respective swing arms 21 and the main frame 1. For the sake of convenience of explanation, only the exemplary structure of the swing restriction mechanism 4 between the left swing arm 21 and the main frame 1 will be described. The swing restriction mechanism 4 between the right swing arm 21 and the support pipe 11 is symmetric to the left swing restriction mechanism 4 and will not be further described below.

[0320] Referring to FIGS. 38 to 40, the support pipe 11 is provided with a first through hole 110 extending across the wall of the support pipe 11, and the first through hole 110 is adjacent to the upper end of the support pipe 11. The swing restriction mechanism 4 includes a fixing member 41, and the fixing member 41 is fixed to the main frame 1. More specifically, the fixing member 41 is sleeved in the first through hole 110 and fixed in the third mounting housing 17. In some embodiments, the fixing member 41 may be fixed to the main frame 1 through other structures. For example, the third mounting housing 17 is installed on the support pipe 11, and the fixing member 41 is not directly sleeved in the first through hole 110 of the support pipe 11, but is installed on other appropriate structures of the third mounting housing 17, and the fixing member 41 is indirectly installed on the support pipe 11 of the main frame 1.

[0321] Referring to FIGS. 38 to 40, the circumferential rotation of the fixing member 41 is restricted. In some embodiments, a second axial guide portion 114 is formed on the hole wall of the first through hole 110. The second axial guide portion 114 is configured to guide the axial movement of the fixing member 41 during assembly and prevent the fixing member 41 from rotating relative to the support pipe 11 after assembly. In some embodiments, the second axial guide portion 114 includes, for example, a concave opening formed on the hole wall of the first through hole 110, and a protruding bar 4107 that engages with the concave opening is disposed on the outer periphery of the fixing member 41. It should be noted that there are many implementation forms of the second axial guide portion 114. In some embodiments, the second axial guide portion 114 includes, for example, a protrusion formed on the hole wall of the first through hole 110, and a corresponding slide groove that engages with the protrusion is formed on the outer periphery of the fixing member 41.

[0322] Referring to FIGS. 38 to 40, the fixing member 41 has a limiting groove 411. Since the extending direction of the limiting groove 411 is parallel to the axial direction of the pivot 211 disposed at the upper end of the swing arm 21, the extending direction of the limiting groove 411 is also referred to as the axial direction of the limiting groove 411. The limiting groove 411 has, for example, a groove opening 41101 and a groove bottom 41102, and the groove opening 41101 faces the fifth housing portion 171. In some embodiments, a sleeve 1712 is provided on the fifth housing portion 171. The sleeve 1712 is inserted into the limiting groove 411 of the fixing member 41 through the groove opening 41101, and the sleeve 1712 is configured to support the fixing member 41. In some embodiments, the groove bottom 41102 is located inside the fifth housing portion 171. Passing through the first through hole 110, the groove bottom 41102 may be restricted by a flange 1105 formed on the first through hole 110. In some embodiments, the groove bottom 41102 may directly pass through the first through hole 110 and be restricted by the sixth housing portion 172, for example. The groove bottom 41102 has, for example, a central hole 41100 (shown in FIG. 41).

[0323] Referring to FIGS. 45 and 46, a pivot 211 is provided at the upper end of the swing arm 21. The pivot 211 is non-rotatably connected to the swing arm 21 and is rotatable with respect to the fixed member 41. In some embodiments, the pivot 211 and the swing arm 21 are integrally formed. For example, the pivot 211 is arranged to pass through the limiting groove 411. Referring to FIGS. 38 to 46, a pivot 211 is provided at the upper end of the swing arm 21. The pivot 211 is non-rotatably connected to the swing arm 21 and is rotatable with respect to the fixed member 41. As shown in FIG. 41, the end of the pivot 211 passes through the hole 1704 of the fifth housing portion 171 and enters the limiting groove 411, and then exits from the central hole 41100 of the groove bottom 41102. In some embodiments, a positioning groove 2117 is formed in the pivot 211, and an axial limiting member such as a spring 27 engages with the positioning groove 2117. The spring 27 is arranged outside the limiting groove 411 and abuts against the groove bottom 41102 to limit the axial movement of the pivot 211. When the swing arm 21 receives a swinging force, the swing arm 21 swings about the axis of the pivot 211 together with the pivot 211.

[0324] In an embodiment not shown, the first limiting surface 4111 and the second limiting surface 4112 may be formed on the inner wall of the limiting groove 411. The abutting member 42 is disposed on the pivot 211, the abutting member 42 is non-rotatably connected to the pivot 211, and is disposed between the first limiting surface 4111 and the second limiting surface 4112. The abutting member 42 limits the swing angle of the swing arm 21 by abutting against the first limiting surface 4111 and the second limiting surface 4112. Refer to the drawings. As shown in FIG. 40, in some embodiments, the abutting member 42 and the pivot 211 have a separate structure, and a locking groove 2116 is formed in the pivot 211. An engaging opening 420 is provided in the abutting member 42, and the abutting member 42 is locked to the locking groove 2116 through the engaging opening 420. When the seat 3 is in the swing mode, the abutting member 42 limits the swing angle of the swing arm 21 by abutting against the first limiting surface 4111 and the second limiting surface 4112. When the swing angle of the swing arm 21 is limited, the swing angle of the auxiliary swing arm 29 is also limited.

[0325] Referring to FIGS. 38 to 40, in some embodiments, the limiting groove 411 has a limiting member 43. More specifically, the limiting member 43 is, for example, a plate-like member inserted into the limiting groove 411. The limiting member 43 is formed with a first limiting surface 4111 and a second limiting surface 4112 configured to abut against the abutting member 42. In some embodiments, the limiting member 43 is slidably engaged with the limiting groove 411, and the limiting member 43 can further lock the swing of the swing arm 21 by changing the position of the limiting member 43 within the limiting groove 411.

[0326] Referring to FIG. 43, the limiting member 43 includes a first region 43a and a second region 43b, and the first region 43a and the second region 43b are arranged in sequence in the extending direction of the limiting groove 411. The first region 43a has a first limiting surface 4111 and a second limiting surface 4112, and the second region 43b is engaged with the abutting member 42 to lock the swing of the swing arm 21. The limiting member 43 has a first position or a second position. When the limiting member 43 is switched between the first position and the second position, the first region 43a and the second region 43b are selectively engaged with the abutting member 42. Referring to FIG. 43, the limiting member 43 includes a first region 43a and a second region 43b, and the first region 43a and the second region 43b are selectively engaged with the abutting member 42. Referring to FIG. 45, when the limiting member 43 moves to the first position, the first region 43a is engaged with the abutting member 42, the swing arm 21 can swing, and the seat 3 is in the swing mode. The abutting member 42 abuts against the first limiting surface 4111 or the second limiting surface 4112 as the swing arm 21 swings, and the swing angle of the swing arm 21 is controlled. Referring to FIG. 46, when the limiting member 43 moves to the second position, the second region 43b is engaged with the abutting member 42, the swing arm 21 is locked, and the seat 3 switches from the swing mode to the fixed mode.

[0327] Referring to FIG. 43, in some embodiments, the limiting member 43 includes a force receiving plate 435 and two arms 436 extending from the force receiving plate 435. Referring to FIGS. 38 and 39, the abutting member 42 is adjacent to the groove opening 41101, the force receiving plate 435 is adjacent to the groove bottom 41102, and the two arms 436 extend from the force receiving plate 435 toward the groove opening 41101, that is, the two arms 436 extend along the axial direction of the limiting groove 411. The force receiving plate 435 is configured to receive a driving force for axially moving the limiting member 43. The force receiving plate 435 has a central hole 4350, and the pivot 211 is configured to pass through the central hole 4350.

[0328] Referring to FIG. 43, the outer shape of the force receiving plate 435 is non-circular so that the restricting member 43 does not rotate relative to the fixing member 41. Referring to FIG. 41, the side wall 41131 of the restricting groove 411 has a first axial guide portion 4113 that slidably engages with the force receiving plate 435, and the first axial guide portion 4113 is configured to guide the axial movement of the restricting member 43. The first region 43a and the second region 43b are formed at different axial positions of each arm 436. By controlling the reciprocating movement between the first position and the second position of the restricting member 43, the first region 43a and the second region 43b selectively engage with the abutting member 42. In FIG. 42, the force receiving plate 435 has a first axial guide portion 4113 that slidably engages with the side wall 41131 of the restricting groove 411. As shown in FIG. 43, the first region 43a is closer to the force receiving plate 435 than the second region 43b. Depending on the embodiment, the axial positions of the first region 43a and the second region 43b may be interchanged so that the first region 43a is farther from the force receiving plate 435 than the second region 43b.

[0329] Referring to FIGS. 38 and 42, the abutting member 42 is disposed, for example, between the step 4106 in the limiting groove 411 and the end of the sleeve 1712, and the axial movement of the abutting member 42 is restricted. In some embodiments, the axial position of the abutting member 42 may be fixed by other suitable structures. Two first groove portions 427 are formed on the outer periphery of the abutting member 42, and each first groove portion 427 includes a first end wall 4271 and a second end wall 4272 facing each other. The two arms 436 of the restricting member 43 are each configured to pass through the two first groove portions 427. Referring to FIGS. 44 and 45, the abutting member 42 is disposed between the step 4106 in the limiting groove 411 and the end of the sleeve 1712, and the axial movement of the abutting member 42 is restricted. As shown in FIG. 45, when the first region 43a engages with the abutting member 42, the swing arm 21 swings, and the abutting member 42 rotates about the axis of the pivot 211. When the first end wall 4271 swings and abuts against each first restricting surface 4111 of the corresponding first region 43a, the swing arm 21 cannot continue to swing in the first direction T1. Similarly, when the second end wall 4272 swings and abuts against each second restricting surface 4112 of the corresponding first region 43a, the swing arm 21 cannot continue to swing in the second direction T2. The first direction T1 and the second direction T2 are opposite. It should be noted that the two arms 436 and the two first groove portions 427 are given as examples for illustration, but in some embodiments, the number of the arms 436 and the number of the first groove portions 427 may be, for example, one or more respectively.

[0330] Referring to FIG. 43, a first clamp block 4363 is disposed in the second region 43b of each arm 436, and each first clamp block 4363 extends radially inward. Referring to FIGS. 42 and 44, the contact member 42 may be provided with two second groove portions 428, and the two second groove portions 428 are respectively formed at the groove bottoms 4273 of the two first groove portions 427. Referring to FIG. 46, when the second region 43b engages with the contact member 42, the two second groove portions 428 are respectively configured to engage with the first clamp blocks 4363. At this time, the contact member 42 and the swing arm 21 are locked and cannot swing. Here, two second groove portions 428 and two first clamp blocks 4363 are illustrated, but depending on the embodiment, the number of the second groove portions 428 and the number of the first clamp blocks 4363 may each be, for example, one or more.

[0331] Referring to FIG. 51, in some embodiments, each set of the first groove portion 427 and the second groove portion 428 coincide with each other. At this time, referring to FIG. 52, the structure of the first region 43a of each arm 436 does not change, and the second region 43b of each arm 436 can include a second clamp block 4365 that extends in a direction orthogonal to the extending direction of each arm 436. When the first region 43a of each arm 436 engages with the corresponding first groove portion 427, the swing arm 21 can swing. When the second region 43b of each arm 436 engages with the first groove portion 427 (which also corresponds to the second groove portion 428), each second clamp block 4365 engages with the corresponding first groove portion 427, and the swinging of the swing arm 21 is locked.

[0332] Referring to FIGS. 38 to 40, the third elastic element 46 is disposed within the limiting groove 411, and the third elastic element 46 is configured to apply a driving force to the force receiving plate 435 to move the force receiving plate 435 toward the groove bottom 41102. In some embodiments, the third elastic element 46 is sandwiched, for example, between the abutting member 42 and the force receiving plate 435. Further, the baby carrier also includes a third swing lock mechanism 47, and the third swing lock mechanism 47 is operatively connected to the force receiving plate 435 and drives the limiting member 43 to switch between a first position and a second position. That is, due to the actions of the third elastic element 46 and the third lock mechanism 47, the force receiving plate 435 moves axially along the limiting groove 411, and the limiting member 43 moves to the first position or the second position. As described above, when the limiting member 43 is in the first position, the first region 43a of the arm 436 engages with the abutting member 42, and the seat 3 is in the swing mode. When the limiting member 43 is in the second position, the second region 43b of the arm 436 engages with the abutting member 42, the swing arm 21 cannot swing, and the seat 3 is in the fixed mode.

[0333] Referring to FIGS. 38 to 41, FIGS. 47, and FIGS. 48, an exemplary embodiment of the third swing lock mechanism 47 is shown. The third swing lock mechanism 47 includes a driving wheel 471. The driving wheel 471 is fitted to the pivot 211 through a central hole 4710 and is disposed between the force receiving plate 435 and the groove bottom 41102. The driving wheel 471 abuts against one side surface facing the groove bottom 41102 of the force receiving plate 435. A ratchet portion 4117 is provided on the wall of the limiting groove 411, and a ratchet groove portion 4711 is provided on the driving wheel 471. The ratchet groove portion 4711 has a first ratchet groove 47111 having a first groove depth H1 and a second ratchet groove 47112 having a second groove depth H2 in the circumferential direction in sequence. The first groove depth H1 and the second groove depth H2 are not equal. The number of the ratchet portion 4117, the first ratchet groove 47111, and the second ratchet groove 47112 can be designed as required. For example, in some embodiments, four ratchet portions 4117 are provided, and correspondingly, four first ratchet grooves 47111 and four second ratchet grooves 47112 are provided.

[0334] Referring to FIGS. 38, 39 and 47, in some embodiments, the first groove depth H1 is smaller than the second groove depth H2. When the drive wheel 471 receives the pressing force S, it moves axially and rotates circumferentially, and the ratchet portion 4117 engages with the first ratchet groove 47111 and the second ratchet groove 47112 in sequence. In some embodiments, when the ratchet portion 4117 engages with the first ratchet groove 47111, the limiting member 43 is in the first position as shown in FIG. 45. When the ratchet portion 4117 engages with the second ratchet groove 47112, the limiting member 43 is in the second position as shown in FIG. 46. In some embodiments, when the ratchet portion 4117 engages with the first ratchet groove 47111, the limiting member 43 is in the second position, and when the ratchet portion 4117 engages with the second ratchet groove 47112, the limiting member 43 is in the first position.

[0335] As shown with reference to FIGS. 41, 47, and 48, in order to easily drive the drive wheel 471, the third swing lock mechanism 47 further includes a press member 472. The press member 472 has a press portion 4721 and a push portion 4722 extending from the press portion 4721. A mounting hole 41103 is formed in the groove bottom 41102 of the restriction groove 411, and the push portion 4722 extends into the restriction groove 411 through the mounting hole 41103. The push portion 4722 is configured to apply a pressing force S to the bevel 47101 of the first ratchet groove 47111 of the drive wheel 471 or the bevel 47102 of the second ratchet groove 47112 of the drive wheel 471. The drive wheel 471 simultaneously performs axial movement and circumferential rotation, and the ratchet portion 4722 engages with the groove bottom 41102 of the restriction groove 411. The 4117 of the fixing member 41 sequentially engages with the first ratchet groove 47111 and the second ratchet groove 47112. Referring to FIGS. 41 and 49, in some embodiments, the push portion 4722 includes two push arms 47220 extending from the push portion 4721. A pressing step 47221 is formed at the center of each push arm 47220, and is configured to apply a pressing force S to the bevel 47101 or the bevel 47102 of the drive wheel 471. It should be understood that in some embodiments, the number of the push arms 47220 is not limited to two. Referring to FIG. 43, an avoidance opening 4351 is formed at a position on the force receiving plate 435 corresponding to the position of each push arm 47220.

[0336] Here, the process of switching the seat 3 between the fixed mode and the swing mode will be described in detail by combining FIGS. 41, 45 to 49.

[0337] When the seat 3 is in the fixed mode where it cannot swing, the swing arm 21 cannot swing, the ratchet portion 4117 engages with the second ratchet groove 47112, the restricting member 43 is in the second position as shown in Fig. 46, and the first clamp block 4363 engages with the second groove portion 428. At this time, when the pressing member 472 is pressed once, the pressing step 47221 of the push portion 4722 engages with the inclined surface 47102, and the driving wheel 471 is rotationally driven in the circumferential direction while moving in the axial direction. Due to the axial movement of the driving wheel 471, the restricting member 43 moves away from the second position, and due to the circumferential rotation of the driving wheel 471, the ratchet portion 4117 faces the inclined surface 47101 of the first ratchet groove 47111. Next, when the pressing member 472 is released, the third elastic element 46 exerts a driving force, moves the force receiving plate 435 to the groove bottom 41102, and pushes the driving wheel 471 in the reverse direction. While the inclined surface 47101 of the first ratchet groove 47111 of the driving wheel 471 is in contact with the ratchet portion 4117, the driving wheel 471 rotates until the first ratchet groove 47111 engages with the ratchet portion 4117. At this time, the restricting member 43 reaches the first position, the swing arm 21 becomes swingable, and the seat 3 switches to the swing mode.

[0338] Similarly, when the seat 3 is in the swing mode, when the pressing member 472 is pressed once, the ratchet portion 4117 disengages from the first ratchet groove 47111 and engages with the second ratchet groove 47112, the restricting member 43 reaches the second position and the swing arm 21 cannot swing, and the seat 3 switches to the fixed mode.

[0339] In some embodiments, the positions of the ratchet portion 4117 on the wall surface of the limiting groove 411 and the ratchet groove portion 4711 on the driving wheel 471 may be interchanged. That is, the ratchet portion 4117 is disposed on the driving wheel 471, and the first ratchet groove 47111 and the second ratchet groove 47112 are disposed on the wall surface of the limiting groove 411. In this case, when the driving wheel 471 receives the pressing force S and moves axially and rotates circumferentially, as the driving wheel 471 rotates, the ratchet portion 4117 sequentially engages with the first ratchet groove 47111 and the second ratchet groove 47112, thereby also obtaining the effect of controlling the limiting member 43 to be switched between the first position and the second position.

[0340] Referring to FIGS. 38 and 39, in some embodiments, the third swing lock mechanism 47 further includes a restoring spring 473. In this case, each time the pressing member 472 is pressed, the restoring spring 473 drives to reset the pressing member 472, and the pressing member 472 is reset to a position convenient for the next pressing.

[0341] Referring to FIGS. 38, 39, and 49, in some embodiments, hooks 47222 are formed at both ends of the extrusion arm. The axial distance between the pressing step 47221 and the hook 47222 is greater than the axial length of the driving wheel 471, and the driving wheel 471 is located between the pressing step 47221 and the hook 47222. The hook 47222 is configured to be hooked on the driving wheel 471 after the pressing force S is released, limit the moving distance of the pressing member 472 during the reset process, prevent the pressing step 47221 from being too far away from the driving wheel 471, and lead to a decrease in the next pressing stroke of the pressing member 472. In some embodiments, each push arm has a protruding finger 47223, and the protruding finger 47223 is located in the limiting groove 411 and is limited by the groove bottom 41102, whereby the pressing member 472 can be prevented from disengaging from the fixing member 41.

[0342] Referring to FIGS. 40 and 47, a protruding ring 4713 is provided on the side of the force receiving plate 435 of the driving wheel 471 facing it, and the outer diameter of the protruding ring 4713 is smaller than the outer diameter of the driving wheel 471. A gap for the hook 47222 to catch is provided between the outer periphery of the protruding ring 4713 and the outer periphery of the driving wheel 471. The protruding ring 4713 and the force receiving plate 435 are always in contact.

[0343] Referring to FIGS. 37 and 40, in some embodiments, a limiting recess 1701 is formed on the outside of the third mounting housing 17. The limiting recess 1701 has a first limiting wall 17011 and a second limiting wall 17012. The swing arm 21 swings between the first limiting wall 17011 and the second limiting wall 17012. The first limiting wall 17011 and the second limiting wall 17012 can also function to limit the swing angle of the swing arm 21. In some embodiments, a limiting recess 1702 is also formed on the outside of the third mounting housing 17, and the limiting recess 1702 corresponds to the auxiliary swing arm 29. The limiting recess 1702 has a third limiting arm 17021 and a fourth limiting arm 17022, and the auxiliary swing arm 29 swings between the third limiting arm 17021 and the fourth limiting arm 17022. The third limiting arm 17021 and the fourth limiting arm 17022 function to limit the swing angle of the auxiliary swing arm 29.

[0344] Also, in some embodiments, the third swing lock mechanism 47 may not be provided, and the first swing lock mechanism 6 of the first embodiment is arranged in the third mounting housing 17, whereby the swing of the swing arm 21 is locked and the seat 3 switches from the swing mode to the fixed mode.

[0345] In the above embodiments, the swing limiting mechanism 4 is arranged between the swing arm 21 and the main frame 1. However, in other embodiments, the swing limiting mechanism 4 may be arranged between the auxiliary swing arm 29 and the main frame 1. Also, in some embodiments, if the main frame 1 has a structure that can position the fixing member 41, the swing limiting mechanism 4 may not be arranged on the support pipe 11.

[0346] Further, the swing arms 21 and the auxiliary swing arm 29 provided in parallel with each other in this embodiment may be applied to the baby carriers provided in the first and second embodiments. As a result, the seat 3 can be kept horizontal while swinging in the swing mode.

[0347] A swing mechanism is also provided in this embodiment. The swing mechanism includes a fixed member 41, a swing arm 21, and a contact member 42. Hereinafter, the description will focus on the differences between the swing mechanism of this embodiment and the swing mechanism of the first embodiment, and the same or similar points will not be repeatedly described.

[0348] The extending direction of the limiting groove 411 of the fixed member 41 is parallel to the axial direction of the pivot 211. The limiting member 43 is disposed in the limiting groove 411 of the fixed member 41. More specifically, the limiting member 43 is, for example, a plate piece inserted into the limiting groove 411 of the fixed member 41. The position of the limiting member 43 in the limiting groove 411 is adjustable. The limiting member 43 includes a first region 43a and a second region 43b. The first region 43a has a first limiting surface 4111 and a second limiting surface 4112. The second region 43b is adapted to engage with the contact member 42 to lock the swing arm 21. The limiting member 43 is slidably engaged with the limiting groove 411 and has a first position and a second position. When the limiting member 43 is in the first position, the first region 43a engages with the contact member 42, and the swing arm 21 can swing within a preset angular range. When the limiting member 43 is in the second position, the second region 43b engages with the contact member 42, and the swing arm 21 is locked and cannot swing. For the realization of the limiting member 43 and the contact member 42, reference can be made to the above description.

[0349] The swing mechanism may further be provided with a third swing lock mechanism 47 and a third elastic element 46 for adjusting the position of the limiting member 43 in the limiting groove 411.

[0350] The swing mechanism can not only swing the swing arm 21 within a preset angular range, but also lock the swing arm 21 so that the swing arm 21 does not swing.

[0351] Sixth Embodiment

[0352] Figures 55 to 72 schematically show the structure of the baby carrier according to the sixth embodiment of the present invention. Similar to the baby carriers of the first, second, and fifth embodiments, the baby carrier of the sixth embodiment will also be described by taking a baby dining chair as an example. The type of the baby carrier is not limited to the baby dining chair. Referring to FIG. 55, the baby carrier includes, for example, a main frame 1, a swing bracket assembly 2, and a seat 3.

[0353] Referring to FIG. 55, the structure of the main frame 1 of the sixth embodiment is similar to the structure of the main frame 1 of the first embodiment. The main frame 1 includes two front leg support portions 101, two rear leg support portions 102, a front cross bar 1031 connected between the two front leg support portions 101, a rear cross bar 1032 connected between the two rear leg support portions 102, a folding member 104 connected between the front leg support portion 101 and the rear leg support portion 102 on the same side, and support pipes 11 respectively disposed on the upper portions of the corresponding front leg support portions. For the interrelationship of these components of the main frame 1, reference can be made to the description of the first embodiment, and it will not be repeated here.

[0354] Referring to FIG. 55, the structure of the seat 3 is similar to the structure of the seat 3 of the first embodiment. The seat 3 includes a base 305, two safety fences 306, a backrest 307, a dinner plate 308 or a front armrest, and a footrest 309, etc. When there is no contradiction, for the connection relationship between these components of the seat 3, reference can be made to the description of the first embodiment, and it will not be repeated here.

[0355] Referring to FIG. 55, the left and right sides of the seat 3 are pivotally connected to the main frame 1 via swing bracket assemblies 2 respectively, and the seat 3 can swing back and forth relative to the main frame 1, and the seat 3 has a swing mode. In some embodiments, the swing bracket assembly 2 is pivotally connected to the main frame 1, and the swing bracket assembly 2 is pivotally connected to the seat 3. The baby carrier also includes a seat holding mechanism 39 (shown in FIG. 62) disposed between the main frame 1 and the seat 3. The seat 3 swings back and forth relative to the main frame 1 by the swing bracket assembly 2, and the seat holding mechanism 39 is configured to control the seat 3 to be kept horizontal while the seat 3 swings back and forth relative to the main frame 1, so that the baby sitting on the seat 3 does not tilt forward or backward with the swing, and the risk of the baby falling off the seat 3 can be effectively avoided. Further, by keeping the seat 3 horizontal during the swing, the items on the dinner plate 308 can also be effectively prevented from falling.

[0356] Referring to FIG. 56, in some embodiments, the main frame 1 has a first pivot portion 183, and is pivotally connected to the upper end of the swing bracket assembly 2 via the first pivot portion 183. To conveniently arrange the first pivot portion 183, the main frame 1 also includes a fourth mounting housing 18, and the first pivot portion 183 is attached to the fourth mounting housing 18. In some embodiments, the fourth mounting housing 18 is attached to, for example, the support pipe 11 of the main frame 1. In some embodiments, depending on the change in the structure of the main frame 1, the installation position of the fourth mounting housing 18 may also be changed.

[0357] Referring to FIG. 56, in some embodiments, the fourth mounting housing 18 may be formed by butting the seventh housing portion 181 and the eighth housing portion 182. For example, the seventh housing portion 181 and the eighth housing portion 182 are joined to each other and then fixed with screws 189. The seventh housing portion 181 is closer to the longitudinal center plane of the baby carrier (or the center plane of left - right symmetry) than the eighth housing portion 182. The eighth housing portion 182 has, for example, a fourth sleeve portion 180, and the fourth sleeve portion 180 fits onto the end of the support pipe 11. In some embodiments, the fourth sleeve portion 180 and the support pipe 11 are fixedly connected by a fastener such as a screw. An operation button 184 is provided on the eighth housing portion 182 and is configured to, for example, release the locking relationship between the support pipe 11 and the front leg support portion 101 and to extend and retract the support pipe 11 relative to the front leg support portion 101 so as to adjust the height of the seat 3.

[0358] Referring to FIG. 57, in some embodiments, the first pivot portion 183 includes a mounting portion 1832 and a first pivot ring 1833. The mounting portion 1832 is disposed on the fourth mounting housing 18, and the first pivot ring 1833 is connected to the fourth mounting housing 18 by the mounting portion 1832. In some embodiments, the mounting portion 1832 is fixedly connected to the seventh housing portion 181 of the fourth mounting housing 18 and has a columnar structure protruding from the seventh housing portion 181. The mounting portion 1832 is non-rotatable relative to the fourth mounting housing 18. The columnar mounting portion 1832 and the seventh housing portion 181 are integrally formed or fixed by screwing, riveting, or welding. The first pivot ring 1833 fits onto the columnar mounting portion 1832 but is non-rotatable relative to the columnar mounting portion 1832. The first pivot ring 1833 is pivotally connected to the swing bracket assembly 2. It should be understood that the implementation of the first pivot portion 183 is not limited to the above example. For example, in some embodiments, the mounting portion 1832 is a locking groove formed in the fourth mounting housing 18, the locking groove is formed in the seventh housing portion 181, and has a groove opening configured to allow the first pivot ring 1833 to be inserted. The first pivot ring 1833 non-rotatably fits into the mounting portion 1832, which is the locking groove, through the groove opening. Alternatively, in some embodiments, the first pivot portion 183 is not assembled by a plurality of components but is an integral member, and in this case, the first pivot portion 183 and the seventh housing portion 181 are integrally formed.

[0359] Referring to FIG. 57, in some embodiments, at least one second guide groove 18321 is formed in the outer peripheral wall of the cylindrical mounting portion 1832, and at least one protruding rib 18333 is disposed on the inner peripheral wall of the first pivot ring 1833. When the first pivot ring 1833 is attached to the cylindrical mounting portion 1832 along the attachment direction Q1, the second guide groove 18321 and the protruding rib 18333 engage in an uneven fitting manner, and this engagement guides the first pivot ring 1833 to fit onto the cylindrical mounting portion 1832 on the one hand, and prevents relative rotation between the first pivot ring 1833 and the cylindrical mounting portion 1832 on the other hand. In some embodiments, the positions of the protruding rib 18333 and the second guide groove 18321 may be interchanged.

[0360] Referring to FIG. 57, in some embodiments, at least one first elastic arm 18322 is disposed on the outer peripheral wall of the columnar mounting portion 1832, and the first elastic arm 18322 has a protruding finger 18323. A locking portion 18332 is formed on the inner peripheral wall of the first pivot ring 1833, and the locking portion 18332 is, for example, a groove 18302 formed on the inner peripheral wall of the first pivot ring 1833. When the first pivot ring 1833 is attached to the columnar mounting portion 1832 along the attachment direction Q1, after the locking portion 18332 passes through the protruding finger 18323, the protruding finger 18323 rebounds and abuts against the locking portion 18332, thereby effectively preventing the first pivot ring 1833 from coming off the columnar mounting portion 1832.

[0361] Referring to FIG. 58, in some embodiments, the swing bracket assembly 2 includes a swing housing 23. The swing housing 23 includes, for example, a cover 2301 and a fence 2302 extending from an edge of the cover 2301. An opening 2303 formed and surrounded by the fence 2302 may be shielded by a safety fence 306 of the seat 3. The first pivot portion 183 is housed within the swing housing 23. More specifically, the cover 2301 has a mounting hole 230, and a first receiving portion 231 corresponding to the mounting hole 230 is formed within the swing housing 23. The first pivot ring 1833 is sleeved within the first receiving portion 231, and a columnar mounting portion 1832 extends through the mounting hole 230 into the swing housing 23 and is sleeved within the first pivot ring 1833. When the seat 3 swings relative to the main frame 1, the swing housing 23 rotates about the axis of the first pivot ring 1833.

[0362] Referring to FIG. 58, in some embodiments, the baby carrier further includes a first axial limiting mechanism 2311, and the first axial limiting mechanism 2311 is configured to limit the axial movement of the first pivot ring 1833 relative to the swing housing 23, thereby preventing the swing housing 23 from separating from the fourth mounting housing 18 of the main frame 1.

[0363] Referring to FIGS. 58 and 65, in some embodiments, the first axial limiting mechanism 2311 includes a limiting step 23111 and an elastic stop block 23112 disposed on the wall of the first receiving portion 231. When the first pivot ring 1833 engages with the first receiving portion 231 of the swing housing 23 along the installation direction Q2, the elastic stop block 23112 elastically deforms, and the first pivot ring 1833 is sleeved within the first receiving portion 231. When one end face of the first pivot ring 1833 abuts against the limiting step 23111, the elastic stop block 23112 rebounds and abuts against the other end face of the first pivot ring 1833, sandwiching the first pivot ring 1833 between the limiting step 23111 and the elastic stop block 23112.

[0364] Referring to FIG. 65, in some embodiments, a first guide groove 18331 is formed on the outer peripheral wall of the first pivot ring 1833. During the installation of the first pivot ring 1833 and the swing housing 23, the elastic stop block 23112 is slidably engaged with the first guide groove 18331. The groove depth H3 of the first guide groove 18331 gradually increases along the installation direction Q2 of the first pivot ring 1833, and / or the width W of the first guide groove 18331 gradually increases along the installation direction of the first pivot ring 1833. Such a design of the first guide groove 18331 is beneficial for reducing the difficulty of installing the swing housing 23 and the first pivot ring 1833.

[0365] Referring to FIGS. 59 and 60, the lower end of the swing bracket assembly 2 is pivotally connected to the safety fence 306 of the seat 3. In some embodiments, the second pivot portion 38 is disposed on the safety fence 306 of the seat 3, and the safety fence 306 of the seat 3 is pivotally connected to the lower end of the swing bracket assembly 2 via the second pivot portion 38. More specifically, it is pivotally connected to the lower end of the swing housing 23. In some embodiments, the second pivot portion 38 includes a second pivot ring 382. The second pivot ring 382 is fixedly connected to the safety fence 306. In some embodiments, the second pivot portion 38 and the safety fence 306 are integrally formed or fixed by screwing, riveting, or welding. The second pivot ring 382 cannot rotate relative to the safety fence 306 of the seat 3.

[0366] Referring to FIGS. 58 and 59, in some embodiments, the swing housing 23 has a second receiving portion 232. When the opening 2303 of the swing housing 23 is covered by the safety fence 306, the second pivot ring 382 is sleeved in the second receiving portion 232 of the swing housing 232. When the seat 3 pivots relative to the main frame 1, relative rotation may occur between the second pivot ring 382 and the swing housing 23.

[0367] Referring to FIGS. 59 and 65, in some embodiments, the baby carrier further includes a second axial limiting mechanism 2312, and the second axial limiting mechanism 2312 is configured to limit the axial movement of the swing housing 23 relative to the second pit ring 382, thereby avoiding separation between the swing housing 23 and the safety fence 306.

[0368] Referring to FIGS. 59 and 65, in some embodiments, the second axial limiting mechanism 2312 includes a second elastic arm 23121 disposed within the second receiving portion 232. When the swing housing 23 is connected to the safety fence 306, the second elastic arm 23121 passes through the inner hole 3820 of the second pivot ring 382, and then the protruding finger 231211 of the second elastic arm 23121 engages with the edge of the inner hole 3820, whereby the swing housing 23 is connected to the safety fence 306.

[0369] Referring to FIGS. 61 and 62, the seat holding mechanism 39 is installed on the swing housing 23 of the swing bracket assembly 2 and disposed between the main frame 1 and the seat 3. More specifically, the seat holding mechanism 39 is connected between the first pivot portion 183 and the second pivot portion 38. When the seat 3 swings back and forth relative to the main frame 1, the seat holding mechanism 39 is configured such that the swing bracket assembly 2 swings by a first angle in one direction about the first pivot portion 183 (more specifically, the axis of the first pivot ring 1833) (shown in FIGS. 69 and 71). Due to the action of the seat holding mechanism 39, the seat 3 swings by a first angle in the other opposite direction about the second pivot portion 38 (more specifically, the axis of the second pivot ring 382). Thereby, the two-way rotation of the seat 3 is offset, and the seat 3 maintains a horizontal state during the process of swinging back and forth relative to the main frame 1.

[0370] The seat 3 is kept horizontal even during swinging, and the swinging range of the swing bracket assembly 2 is widened. For example, the maximum angle of the backward swing with respect to the starting position of the swing bracket assembly 2 is not limited within 20 degrees, and may be, for example, 25 degrees or more. Referring to FIG. 66, the starting position of the swing housing 23 of the swing bracket assembly 2 is substantially perpendicular to the ground. The maximum angle of the forward swing is not limited within 20 degrees, and may be, for example, 25 degrees or more.

[0371] The seat holding mechanism 39 can be implemented in various ways as long as the effect of keeping the seat 3 horizontal during swinging is obtained. FIG. 62 shows an exemplary structure of the seat holding mechanism 39. The seat holding mechanism 39 includes a gear transmission system 391. The gear transmission system 391 is installed in the swing housing 23 and includes, for example, a driving gear 3911. The driving gear 3911 is installed on a support column 2309 (shown in FIG. 65), and the support column 2309 is connected to the cover 2301. The driving gear 3911 has a third tooth portion 39111 and a fourth tooth portion 39112. The first pivot portion 183 includes a first tooth portion 1831, and the first tooth portion 1831 is formed, for example, on a part of the outer peripheral wall of the first pivot ring 1833. The second pivot portion 38 includes a second tooth portion 381, and the second tooth portion 381 is formed, for example, on a part of the outer peripheral wall of the second pivot ring 1833. Pivot ring 382. The first tooth portion 1831 and the second tooth portion 381 mesh with the driving gear 3911 of the gear transmission system 391 respectively. More specifically, the first tooth portion 1831 meshes with the third tooth portion 39111 of the driving gear 3911, and the second tooth portion 381 meshes with the fourth tooth portion 39112 of the driving gear 3911.

[0372] Referring to FIGS. 66 to 71 together, the mutual positional relationship of the first tooth portion 1831, the driving gear 3911, and the second tooth portion 381 when the seat 3 swings with respect to the main frame 1 is shown, and the state in which the seat 3 swings with respect to the main frame 1 while the seat 3 keeps horizontal is shown.

[0373] Referring to FIGS. 66 and 67, the seat 3 is in the lowest swing position, and at this time the swing angle of the seat 3 is zero. The symbol O' in the figure indicates the pivoting center of the first pivot ring 1833, and the symbol O'' indicates the pivoting center of the second pivot ring 382. At this time, the line X connecting the swing center O' and the swing center O'' is substantially perpendicular to the ground, and an included angle δ is formed between the backrest 307 of the seat 3 and the line X.

[0374] Referring to FIGS. 68 and 69, the seat 3 swings backward in the first direction T1 with respect to the main frame 1. At this time, an angle θ is formed between the line X connecting the pivot center O' and the pivot center O'', and the vertical line Z perpendicular to the ground. The angle θ is the first angle at which the swing housing 23 swings in the direction Y1 about the pivot center O'. Due to the swing of the swing housing 23, the drive gear 3911 rotates with respect to the first pivot ring 1833, and due to the rotation of the drive gear 3911, the second pivot portion 38 and the seat 3 swing by a first angle in the direction Y2 about the pivot center O''. The direction Y2 is opposite to the direction Y1. At this time, an included angle (δ + θ) is formed between the backrest 307 of the seat 3 and the straight line X, that is, the angle δ between the backrest 307 and the vertical line Z does not change, that is, the seat 3 remains horizontal even during the backward swing.

[0375] Referring to FIGS. 70 and 71, the seat 3 swings forward in the second direction T2 with respect to the main frame 1. At this time, an angle η is formed between the line X connecting the pivot center O' and the pivot center O'', and the vertical line Z. The angle η is the first angle at which the swing housing 23 swings in the Y3 direction about the pivot center O'. Due to the swing of the swing housing 23, the drive gear 3911 rotates with respect to the first pivot ring 1833, and due to the rotation of the drive gear 3911, the second pivot portion 38 and the seat 3 swing by a first angle in the Y4 direction about the pivot center O''. The direction Y4 is opposite to the direction Y3. At this time, an included angle δ - η is formed between the backrest 307 of the seat 3 and the straight line X, that is, the included angle δ between the backrest 307 and the vertical line Z does not change, and the seat 3 remains horizontal when swinging forward.

[0376] In the above embodiment, the gear transmission system 391 is described by taking one drive gear 3911 as an example. However, in other embodiments, the gear transmission system 391 may further include two or more drive gears 3911. More specifically, the first tooth portion 1831 meshes with, for example, one drive gear 3911 of the gear transmission system 391, and the second tooth portion 381 meshes with, for example, another drive gear 3911 of the gear transmission system 391. The two drive gears 3911 may mesh directly or indirectly, and thereby, the effect of controlling the seat 3 to be kept horizontal during the forward and backward swing with respect to the main frame 1 can also be achieved.

[0377] Referring to FIGS. 62, 64, and 65, in some embodiments, the baby carrier further includes a first swing limiting mechanism 481. The first swing limiting mechanism 481 is configured to limit the swing angle of the swing housing 23 with respect to the main frame 1, thereby controlling the swing range of the seat 3 within a safe range and realizing the riding safety and comfort of the seat 3 in the swing mode.

[0378] The first swing limiting mechanism 481 can be realized in various ways. Referring to FIG. 62, in some embodiments, the first swing limiting mechanism 481 includes a first groove 4810 and a first stop portion 4811. The first groove 4810 is formed on the outer peripheral wall of the first pivot ring 1833, and the first stop portion 4811 is disposed on the wall of the first receiving portion 231, and the first stop portion 4811 extends into the first groove 4810. When the swing housing 23 swings, the first stop portion 4811 abuts against one of the two end walls 48101 of the first groove 4810, limiting the swing angle of the swing housing 23. In some embodiments, the positions of the first groove 4810 and the first stop portion 4811 may be interchanged.

[0379] Referring to FIGS. 59, 62, and 65, in some embodiments, the baby carrier further includes a second swing limiting mechanism 482. The second swing limiting mechanism 482 is configured to limit the swing angle of the seat 3 relative to the swing housing 23 or the main frame 1, thereby also serving to control the swing range of the seat 3 within a safe range.

[0380] The second swing limiting mechanism 482 can be implemented in various ways. Referring to FIG. 62, in some embodiments, the second swing limiting mechanism 482 includes a second groove 4820 and a second stop portion 4821. The second groove 4820 is formed on the outer peripheral wall of the second pivot ring 382, and the second stop portion 4821 is disposed on the wall of the second receiving portion 232, and the second stop portion 4821 extends into the second groove 4820. When the swing housing 23 swings, the second stop portion 4821 abuts against one of the two end walls 48201 of the second groove 4820, thereby limiting the swing angle of the seat 3. In some embodiments, the positions of the second groove 4820 and the second stop portion 4821 may be interchanged.

[0381] Referring to FIGS. 62 to 65, in some embodiments, the baby carrier may further be provided with a fourth swing lock mechanism 483. The fourth swing lock mechanism 483 indirectly locks or unlocks the swing of the seat 3 by locking or unlocking the swing of the swing housing 23, and can switch the seat 3 between a fixed mode and a swing mode. It should be understood that when the seat 3 is in the fixed mode, the seat 3 cannot swing relative to the main frame 1. The fourth swing lock mechanism 483 may be implemented in various ways. For example, in some embodiments, the fourth swing lock mechanism 483 includes a lock pin elastically extending from a seventh housing portion 181 of the fourth mounting housing 18 and a release member configured to control the extension and contraction of the lock pin. A lock hole is formed in the safety fence 306 of the seat 3. When the lock pin is inserted into the lock hole, the seat 3 switches to the fixed mode, and when the lock pin retracts from the lock hole, the seat switches to the swing mode.

[0382] FIGS. 62 to 65 show an exemplary embodiment of the fourth swing lock mechanism 483, and the fourth swing lock mechanism 483 locks the swing of the swing housing 23 by locking the drive gear 3911. More specifically, the fourth swing lock mechanism 483 is attached to the swing housing 23 and includes a fourth release member 4831 and a lock block 4832. When the baby carrier is in the fixed mode, the lock block 4832 is inserted into the limiting groove 3910 of the drive gear 3911. Therefore, the drive gear 3911 is locked and cannot rotate. Therefore, neither the second pivot portion 38, the swing housing 23, nor the seat 3 can swing. As shown in FIG. 64, the limiting groove 3910 is disposed between a third tooth portion 39111 and a fourth tooth portion 39112. The fourth release member 4831 is operatively connected to the lock block 4832, and the fourth release member 4831 can remove the lock block 4832 from the limiting groove 3910 to switch the baby carrier from the fixed mode to the swing mode.

[0383] In some embodiments, the fourth release member 4831 may be directly or indirectly connected to the lock block 4832. Referring to FIGS. 63 to 65, in some embodiments, the fourth swing lock mechanism 483 further includes a drive member 4833, and the lock block 4832 is installed on the drive member 4833. More specifically, the lock block 4832 and the drive member 4833 are integrally formed. The fourth release member 4831 drives the lock block 4832 via the drive member 4833. The fourth release member 4831 can be arranged at any appropriate position according to requirements (for example, space layout requirements) by arranging the drive member 4833.

[0384] In some embodiments, the drive member 4833 is slidably engaged with the swing housing 23, and the fourth release member 4831 is slidably engaged with the swing housing 23. The slide direction of the fourth release member 4831 intersects the slide direction of the drive member 4833, thereby realizing a compact structure of the fourth swing lock mechanism 483. In some embodiments, the slide direction of the fourth release member 4831 may be perpendicular to the slide direction of the drive member 4833.

[0385] Referring to FIG. 64, in some embodiments, the swing housing 23 has a seventh elongated hole 233. The fourth release member 4831 has an operating portion 48311 and a third post 48312 extending from the operating portion 48311. The third post 48312 is slidably engaged with the seventh elongated hole 233. When it is necessary to switch the baby carrier between the fixed mode and the swing mode, the user can operate the operating portion 48311 to slide the third post 48312 along the seventh elongated hole 233 so that the fourth release member 4831 moves to the unlock position (shown in FIGS. 62, 66 to 71) or the lock position (shown in FIGS. 63 and 72). When the fourth release member 4831 is in the unlock position, the lock block 4832 retracts from the limiting groove 3910 (shown in FIG. 62), and the seat 3 can swing back and forth relative to the main frame 1. Also, when the fourth release member 4831 is in the lock position, it can be seen that the lock block 4832 is inserted into the limiting groove 3910 (shown in FIG. 63), and the seat 3 cannot swing back and forth relative to the main frame 1.

[0386] Referring to FIG. 65, in some embodiments, a guide structure 2308 is provided on the cover 2301 of the swing housing 23, and the drive member 4833 is slidably engaged with the guide structure 2308. A receiving hole 48338 is also provided in the drive member 4833, and the receiving hole 48338 is slidably engaged with the support column 2309. A third connection hole 48330 is provided in the drive member 4833, and a third inclined wall 483301 is provided in the third connection hole 48330. After passing through the seventh elongated hole 233, the third column 48312 enters the third connection hole 48330. Referring to FIGS. 62 and 63, when the fourth release member 4831 moves from the locked position to the unlocked position, the third column 48312 presses the third inclined wall 483301, and the drive member 4833 drives the lock block 4832 out of the limiting groove 3910. In some embodiments, a cap screw is attached to the central hole (not shown in the figure) of the third column 48312, and the cap of the cap screw abuts against the drive member 4831 to prevent the fourth release member 4831 from detaching from the drive member 4833. In some embodiments, the fourth release member 4831 is also prevented from detaching from the drive member 4833 by other limiting structures.

[0387] In some embodiments not shown, the third connection hole 48330 is an elongated hole, and the third connection hole 48330 is inclined with respect to the seventh elongated hole 233. When the fourth release member 4831 slides between the unlocked position and the locked position, the third column 48312 directly slide-drives the drive member 4833, and the lock block 4832 is inserted into or removed from the limiting groove 3910.

[0388] Referring to FIGS. 62 and 63, in some embodiments, the third connection hole 48330 is substantially triangular. A third limiting portion 483302 is provided at one end of the third inclined wall 483301. The third limiting portion 483302 is configured to engage with the third column 48312, and the fourth release member 4831 is held in the unlocked position. In this way, the fourth release member 4831 is held in the unlocked position by a simple structure.

[0389] Referring to FIGS. 62 and 63, in some embodiments, the fourth swing lock mechanism 483 further includes a fourth elastic element 4834, and the fourth elastic element 4834 is configured to drive the lock block 4832 to be inserted into the limiting groove 3910. The fourth elastic element 4834 is, for example, a spring installed between the driving member 4833 and the fence 2302 of the swing housing 23.

[0390] Referring to FIG. 65, an elastic claw 2331 is further disposed on the hole wall of the seventh elongated hole 233. When the fourth release member 4831 moves to the locked position, the elastic claw 2331 sandwiches the third post 48312, and the fourth release member 4831 can be held in the locked position.

[0391] Referring to FIGS. 64 and 65, in some embodiments, the driving member 4833 includes a first side portion 48331 and a second side portion 48332 facing each other, and a third side portion 48333 connected between the first side portion 48331 and the second side portion 48332. The driving gear 3911 is disposed between the first side portion 48331 and the second side portion 48332. The first side portion 48331 and the second side portion 48332 respectively form receiving holes 48338 that are slidably engaged with the support posts 2309. The lock block 4832 is disposed on the third side portion 48333. In some embodiments, the lock block 4832 and the driving member 4833 are integrally formed, and a recess 48320 for receiving the fourth elastic element 4834 is formed inside the lock block 4832.

[0392] The Seventh Embodiment

[0393] FIGS. 73 and 74 schematically show the structure of a baby carrier according to the seventh embodiment of the present invention. The baby carrier of this embodiment is a modification of the sixth embodiment above. When there is no contradiction, for the structure of each component and the connection relationship between each component in this embodiment, reference can be made to the description of the sixth embodiment. The differences between this embodiment and the sixth embodiment are the implementation of the seat holding mechanism 39 and the implementation of the swing lock mechanism for locking the swing of the seat 3, which will be mainly described below.

[0394] The seat holding mechanism 39 is arranged symmetrically on both sides of the seat 3, for example. Referring to FIGS. 75 and 76, the seat holding mechanism 39 includes a slide pin 392 and a slide groove 393. One of the slide pin 392 and the slide groove 393 is arranged on the main frame 1, and the other is arranged on the seat 3. When the swing bracket assembly 2 swings with respect to the main frame 1, the slide pin 392 and the slide groove 393 are slidably engaged to control the seat 3 to be kept horizontal with respect to the main frame 1 during forward and backward swings.

[0395] Referring to the above embodiments, in some embodiments, the main frame 1 includes fourth mounting housings 18 arranged symmetrically on the left and right. Referring to FIG. 75, a slide pin 392 is arranged in each fourth mounting housing 18, and the slide pin 392 is parallel to, for example, the swing axis of the seat 3, that is, the axis of the swing of the seat 3 with respect to the main frame 1. In some embodiments, referring to FIG. 76, a fourth through hole 1810 is provided in the seventh housing portion 181 of the fourth mounting housing 18, and the slide pin 392 is configured to pass through the fourth through hole 1810. In some embodiments, in order to form sufficient support for the slide pin 392, a hollow column 1812 protruding outward is arranged in the seventh housing portion 181, and the central hole of the hollow column 1812 serves as the fourth through hole 1810.

[0396] Referring to the above embodiments, in some embodiments, the seat 3 includes safety fences 306 arranged symmetrically on the left and right. Referring to FIG. 75, slide grooves 393 are formed in the safety fences 306, and the slide grooves 393 are in a curved shape. The engagement between the curved groove and the slide pin 392 not only does not affect the front-back swing of the seat 3 with respect to the main frame 1, but also ensures that the seat 3 is kept horizontal during the swing, preventing the seat 3 from tilting forward or backward. Referring to FIG. 78, when the seat 3 is mounted on the support frame 1, the end of the hollow column 1812 abuts against the safety fence 306 of the seat 3, and the slide pin 392 extending from the fourth through hole 1810 extends into the slide groove 393.

[0397] In the above embodiment, the slide pin 392 is arranged in the fourth mounting housing 18 of the main frame 1, and the slide groove 393 is formed in the safety fence 306 of the seat 3. However, in some embodiments, the positions of the slide pin 392 on the main frame 1 and the slide groove 393 on the seat 3 may be interchanged.

[0398] Referring to FIGS. 75 and 77, the seat holding mechanism 39 of this embodiment controls the seat 3 to be kept horizontal during the swing by the slide pin 392 engaged with the slide groove 393. Therefore, the gear transmission system 391 of the sixth embodiment is not necessarily provided. Correspondingly, the fourth swing lock mechanism 483 of the sixth embodiment configured to lock the drive gear 3911 is not necessarily provided. The structure of the seat holding mechanism 39 provided in this embodiment is simple and easy to install. FIG. 76 shows the first tooth portion 1831 of the first pivot ring 1833 of the first pivot portion 183, and FIG. 80 shows the second tooth portion 381 of the second pivot ring 382 of the second pivot portion 38. Since the gear transmission system 391 is not provided, there is no meshing relationship between the first tooth portion 1831 and the second tooth portion 381. Therefore, in the actual application of this embodiment, the first tooth portion 1831 and the second tooth portion 381 may not be provided.

[0399] Referring to FIG. 75, in some embodiments, a locking hole 30 is formed in the slide groove 393, and the locking hole 30 is located, for example, at the center of the slide groove 393. In some embodiments, the locking hole 30 is, for example, a through hole or a blind hole. Referring to FIGS. 78 and 79, the slide pin 392 has a locked position and an unlocked position. When the slide pin 392 is in the locked position shown in FIG. 79, the slide pin 392 extends into the locking hole 30, and the swing of the seat 3 is locked. The seat 3 with the locked swing is difficult to rotate relative to the main frame 1. Referring to FIG. 78, when the slide pin 392 is in the unlocked position, the slide pin 392 retracts from the locking hole 30 but still engages slidably with the slide groove 393, thereby unlocking the swing of the seat 3.

[0400] Referring to FIGS. 80 to 82, in some embodiments, the baby carrier further includes a fifth swing locking mechanism 6a. The fifth swing locking mechanism 6a is configured to control the extension and contraction of the slide pin 392, thereby locking or unlocking the swing of the seat 3. In some embodiments, the fifth swing locking mechanism 6a includes a fifth release member 61a and a fifth elastic element 63a. The fifth release member 61a is configured to directly or indirectly drive the slide pin 392 to be pulled out of the locking hole 30, and the fifth elastic element 63a is configured to drive the slide pin 392 to be inserted into the locking hole 30.

[0401] Referring to FIG. 82, in some embodiments, the fifth release member 61a is configured to move back and forth relative to the fourth mounting housing 18 to switch to an unlock position or a lock position. The seventh housing portion 181 and / or the eighth housing portion 182 are provided with a structure for guiding the movement of the fifth release member 61a. When the fifth release member 61a is in the unlock position, the slide pin 392 retracts from the lock hole 30 and engages slidably with the slide groove 393. When the fifth release member 61a is in the lock position, the slide pin 392 extends into the lock hole 30. In some embodiments, when the slide pin 392 extends into the lock hole 30, for example, it holds the seat 3 in the lowest position shown in FIG. 83. In some embodiments, a plurality of lock holes 30 are provided, whereby the seat 3 can be locked at different heights.

[0402] Referring to FIGS. 80 to 82, in some embodiments, the second annular flange 3923 is disposed at the center of the slide pin 392, and the second annular flange 3923 divides the slide pin 392 into a first portion 3921 and a second portion 3922. The first portion 3921 is configured to pass through the fourth through hole 1810 and extend outward to be inserted into the lock hole 30. A mounting hole 1820 is formed in the eighth housing portion 182, and the second portion 3922 is axially movable so as to be disposed within the mounting hole 1820. The fifth elastic element 63a is, for example, a spring that fits onto the second portion 3922. The fifth release member 61a has an eighth elongated hole 611a, and the eighth elongated hole 611a is a linear hole or a curved hole. A second stop boss 612a extending obliquely is formed on the hole wall of the eighth elongated hole 611a. The second annular flange 3923 is sandwiched between the second stop boss 612a and the fifth elastic element 63a. When the fifth release member 61a moves to the unlock position, the second stop boss 612a pushes the second annular flange 3923 to move axially, and the slide pin 392 exits the lock hole 30. When the fifth release member 61a moves to the lock position, the second stop boss 612a provides an axial space, and the fifth elastic element 63a drives the slide pin 392 to move so as to be inserted into the lock hole 30. The fifth release member 61a can control the axial expansion and contraction of the slide pin 392 by various structures not limited to the above example.

[0403] Referring to FIG. 82, in some embodiments, a locking protrusion 616a is further formed on the hole wall of the eighth elongated hole 611a. The locking protrusion 616a is configured to engage with the slide pin 392 to securely hold the fifth release member 61a in the unlock position. More specifically, when the fifth release member 61a moves to the unlock position and the locking protrusion 616a passes through the slide pin 392, the locking protrusion 616a engages with the slide pin 392 to hold the fifth release member 61a in the unlock position.

[0404] Referring to FIG. 82, in some embodiments, for example, the shaft 1811 is disposed on the fourth mounting housing 18. The fifth release member 61a has a hole 601, and the shaft 1811 is sleeved in the hole 601. The fifth release member 61a rotates about the shaft 1811 and can be switched between an unlock position and a lock position. In some embodiments, for the convenience of operating the fifth release member 61a, a fifth push block 613a is provided on the fifth release member 61a. In some embodiments, the shaft 1811 may not be provided, and the movement of the fifth release member 61a is guided by other structures.

[0405] FIGS. 83 to 85 show the positional relationship between the slide pin 392 and the slide groove 393 when the seat 3 swings with respect to the main frame 1, and the positional change of the seat 3 during the swing.

[0406] Referring to FIG. 83, the seat 3 is in the lowest swing position, and at this time, the swing angle of the seat 3 is zero. The reference symbol O' shown in the figure indicates the pivot center of the first pivot ring 1833, and the reference symbol O'' indicates the pivot center of the second pivot ring 382. At this time, the line X connecting the pivot center O' and the pivot center O'' is substantially perpendicular to the ground, and an included angle δ is formed between the backrest 307 of the seat 3 and the line X.

[0407] Referring to FIG. 84, the seat 3 swings backward in the first direction T1 with respect to the main frame 1. At this time, an angle θ is formed between the line X connecting the pivot center O' and the pivot center O'', and the vertical line Z, and the vertical line Z is perpendicular to the ground. The included angle θ is the first angle at which the swing housing 23 swings in the direction Y1 about the pivot center O'. While the seat 3 moves backward together with the swing housing 23, by engaging the slide pin 392 with the slide groove 393, the seat 3 swings by a first angle in the direction Y2 about the pivot center O'', and the direction Y2 is opposite to the direction Y1. At this time, an included angle δ + θ is formed between the backrest 307 of the seat 3 and the straight line X, that is, the included angle between the backrest 307 and the vertical line Z remains δ, and the seat 3 maintains a horizontal state during the backward swing.

[0408] Referring to FIG. 85, the seat 3 swings forward in the second direction T2 with respect to the main frame 1. At this time, an included angle η is formed between the line X connecting the pivot center O' and the pivot center O'' and the vertical line Z. The included angle η is the first angle at which the swing housing 23 swings in the Y3 direction about the pivot center O'. While the seat 3 moves backward together with the swing housing 23 when the slide pin 392 engages with the slide groove 393, the seat 3 swings by a first angle in the Y4 direction about the pivot center O'', and the Y4 direction is opposite to the Y3 direction. At this time, an included angle δ - η is formed between the backrest 307 of the seat 3 and the line X, that is, the included angle between the backrest 307 and the vertical line Z remains δ, and the seat 3 remains horizontal during the forward swing.

[0409] FIGS. 86 to 92 show a modification of the baby carrier, which is a modification of the embodiment shown in FIGS. 75 to 85. Specifically, the modification mainly changes the structure of the swing bracket assembly 2. When there is no contradiction, the structure of each part of the modification and the connection relationship between each part can refer to the above description. Hereinafter, the description will focus on the differences between the modification and the embodiment shown in FIGS. 75 to 85.

[0410] Referring to FIGS. 86 and 87, in the modified embodiment, the sheet holding mechanism 39 further includes a first wrapping cable 2a, and the first wrapping cable 2a fits in a state of being tensioned on the first pivot ring 1833 and the second pivot ring 382. In the modified embodiment, the first tooth portion 1831 and the second tooth portion 381 are no longer disposed on the first pivot ring 1833 and the second pivot ring 382 respectively, and the first guide groove 18331 is not formed on the first pivot ring 1833. In the modified embodiment, for the connection structure between the main frame 1 and the first pivot ring 1833, reference can be made to the connection structure between the main frame 1 and the first pivot ring 1833 shown in FIG. 75, and thus it will not be repeatedly described here. Referring to FIG. 87, the first wrapping cable 2a is disposed within the swing housing 23, connects the first pivot ring 1833 and the second pivot ring 382, thereby improving the stress situation acting on the swing housing 23. The first wrapping cable 2a is a steel wire rope, but is not limited thereto.

[0411] Referring to FIG. 86, in some embodiments, a first annular groove 1833a is formed on the outer peripheral wall of the first pivot ring 1833, and the first wrapping cable 2a is wound around the first annular groove 1833a. The first annular groove 1833a axially positions the first wrapping cable 2a, thereby preventing the first wrapping cable 2a from accidentally coming off the first pivot ring 1833. A second annular groove 382a is formed on the outer peripheral wall of the second pivot ring 382, and the first wrapping cable 2a is wound around the second annular groove 382a. The second annular groove 382 axially positions the first wrapping cable 2a, thereby preventing the first wrapping cable 2a from accidentally coming off the second pivot ring 382.

[0412] Referring to FIGS. 86 and 88, in some embodiments, the first positioning mechanism 183a is disposed between the first wrapping cable 2a and the first pivot ring 1833, and the first positioning mechanism 183a is configured such that the upper portion of the first wrapping cable 2a does not move relative to the upper portion of the first pivot ring 1833. In some embodiments, the first positioning mechanism 183a is disposed at a position where the first wrapping cable 2a contacts the upper portion of the first annular groove 1833a. More specifically, the first positioning mechanism 183a includes, for example, a positioning groove 18301 formed in the first annular groove 1833a and a clamp block 201a disposed on the first wrapping cable 2a. The clamp block 201a is locked in the positioning groove 18301. However, the first positioning mechanism 183a is not limited to such a structure. In some embodiments, the first positioning mechanism 183a includes, for example, a fastener that fixes the upper portion of the first wrapping cable 2a and the upper portion of the first pivot ring 1833.

[0413] Referring to FIGS. 86 and 88, in some embodiments, a second positioning mechanism 38a is disposed between the first wrapping cable 2a and the second pivot ring 382. The second positioning mechanism 38a is configured such that the bottom portion of the first wrapping cable 2a does not move relative to the bottom portion of the second pivot ring 382. In some embodiments, the second positioning mechanism 38a is disposed at a position where the first wrapping cable 2a contacts the bottom portion of the second annular groove 382a. In some embodiments, the second positioning mechanism 38a includes, for example, a positioning groove 38201 formed in the second annular groove 382a and a clamp block 202a disposed on the first wrapping cable 2a. The clamp block 202a is locked in the positioning groove 38201. However, the second positioning mechanism 38a is not limited to such a structure. In some embodiments, the second positioning mechanism 38a includes, for example, a fastener that fixes the bottom portion of the first wrapping cable 2a and the bottom portion of the second pivot ring 382.

[0414] Referring to FIG. 90, the seat 3 is in the lowest swing position, and at this time the swing angle of the seat 3 is zero. Referring to FIG. 91, the seat 3 swings backward in the first direction T1 with respect to the main frame 1. Referring to FIG. 92, the seat 3 swings forward in the first direction T1 with respect to the main frame 1. In the modified embodiment, the first wrapping cable 2a is fixed to the first annular groove 1833a by the first positioning mechanism 183a and fixed to the second annular groove 382a by the second positioning mechanism 38a. When the seat 3 swings back and forth with respect to the main frame 1, the first wrapping cable 2a can also assist in keeping the seat 3 horizontal during the swing. Specifically, when the seat 3 swings back and forth, due to the action of the first wrapping cable 2a, the seat 3 rotates at a certain angle with respect to the swing housing 23, correcting the rotation of the swing housing 23 with respect to the main frame 1, thereby assisting the seat holding mechanism 39 to keep the seat 3 horizontal during the swing process. The seat holding mechanism 39 includes, for example, the above-described slide pin 392 and slide groove 393.

[0415] FIGS. 93 to 99 show another modified embodiment of the baby carrier, which is a modification of the modified embodiment shown in FIGS. 86 to 92. More specifically, in this another modified embodiment, the structure of the swing bracket assembly 2 is mainly changed. If there is no contradiction, the structure of the components in other modified embodiments and the connection relationships between these components can refer to the above description. The differences between other modified embodiments and the modified embodiments shown in FIGS. 86 to 92 will be mainly described below.

[0416] Referring to FIGS. 93 and 94, in another modified embodiment, the sheet holding mechanism 39 includes an intermediate member 235, and the intermediate member 235 is disposed between the first receiving portion 231 and the second receiving portion 232. The sheet holding mechanism 39 further includes a second wrapping cable 2b and a third wrapping cable 2c. The second wrapping cable 2b fits at one position of the intermediate member 235 and the first pivot ring 1833, and the third wrapping cable 2c fits at another position of the intermediate member 235 and the second pivot ring 382. The second wrapping cable 2b is substantially parallel to the third wrapping cable 2c. In this modified embodiment, a first wrapping cable 2a that is directly connected to the first pivot ring 1833 and directly connected to the second pivot ring 382 is not provided. The second wrapping cable 2b and the third wrapping cable 2c are steel wire ropes, but are not limited thereto. It should be understood that the second wrapping cable 2b and the third wrapping cable 2c may also improve the stress situation on the swing housing 23.

[0417] Referring to FIGS. 95 and 96, in some embodiments, the intermediate member 235 can include a column 2351 and a wheel body 2352 that fits onto the column 2351. The column 2351 extends, for example, from the swing housing 23. The wheel body 2352 is pivotally connected to the column 2351, for example. The second wrapping cable 2b and the third wrapping cable 2c each fit at different positions of the wheel body 2352.

[0418] Referring to FIGS. 93 to 96, in some embodiments, a third annular groove 1833b is formed in the outer peripheral wall of the first pivot ring 1833, and fourth and fifth annular grooves 23501 and 23502 are formed in the outer peripheral wall of the wheel body 2352 of the intermediate member 235 at an axial interval. A sixth annular groove 382b is formed in the outer peripheral wall of the second pivot ring 382. The second wrapping cable 2b is wound around the third annular groove 1833b and the fourth annular groove 23501, and the third wrapping cable 2c is wound around the fifth annular groove 23502 and the sixth annular groove 382b. With the design of these annular grooves, the second wrapping cable 2b and the third wrapping cable 2c can be prevented from moving axially.

[0419] Referring to FIGS. 93 and 95, in some embodiments, a third positioning mechanism 183b is disposed between the second wrapping cable 2b and the first pivot ring 1833, and the third positioning mechanism 183b is configured such that the upper portion of the second wrapping cable 2b does not move relative to the upper portion of the first pivot ring 1833. In some embodiments, the third positioning mechanism 183b is disposed at a position where the second wrapping cable 2b contacts the upper portion of the third annular groove 1833b. In some embodiments, the third positioning mechanism 183b includes, for example, a positioning groove 18303 formed in the third annular groove 1833b and a clamp block 203a disposed on the second wrapping cable 2b. The clamp block 203a is locked in the positioning groove 18303. However, the third positioning mechanism 183b is not limited to such a structure. In some embodiments, the third positioning mechanism 183b includes, for example, a fastener that fixes the upper portion of the second wrapping cable 2b and the upper portion of the first pivot ring 1833.

[0420] Referring to FIGS. 93 and 95, in some embodiments, a fourth positioning mechanism 235a is disposed between the second wrapping cable 2b and the intermediate member 235, and the fourth positioning mechanism 235a is configured such that the bottom of the second wrapping cable 2b does not move relative to the bottom of the intermediate member 235. In some embodiments, the fourth positioning mechanism 235a is disposed at a position where the second wrapping cable 2b contacts the bottom of the fourth annular groove 23501. In some embodiments, the fourth positioning mechanism 235a includes, for example, a positioning groove 2352a formed in the fourth annular groove 23501 and a clamp block 204a disposed on the second wrapping cable 2b. The clamp block 204a is locked in the positioning groove 2352a. However, the fourth positioning mechanism 235a is not limited to such a structure. In some embodiments, the fourth positioning mechanism 235a includes, for example, a fastener that fixes the bottom of the second wrapping cable 2b and the bottom of the intermediate member 235.

[0421] Referring to FIGS. 93 and 95, in some embodiments, a fifth positioning mechanism 235b is disposed between the third wrapping cable 2c and the intermediate member 235, and the fifth positioning mechanism 235b is configured such that the upper part of the third wrapping cable 2c does not move relative to the upper part of the intermediate member 235. In some embodiments, the fifth positioning mechanism 235b is disposed at a position where the third wrapping cable 2c contacts the upper part of the fifth annular groove 23502. In some embodiments, the fifth positioning mechanism 235b includes, for example, a positioning groove 2352b formed in the fifth annular groove 23502 and a clamp block 205a disposed on the third wrapping cable 2c. The clamp block 205a is locked in the positioning groove 2352b. However, the fifth positioning mechanism 235b is not limited to such a structure. In some embodiments, the fifth positioning mechanism 235b includes, for example, a fastener that fixes the upper part of the third wrapping cable 2c and the upper part of the intermediate member 235.

[0422] Referring to FIGS. 93 and 95, in some embodiments, a sixth positioning mechanism 38b is disposed between the third wrapping cable 2c and the second pivot ring 382. The sixth positioning mechanism 38b is configured such that the bottom of the third wrapping cable 2c does not move relative to the bottom of the second pivot ring 382. In some embodiments, the sixth positioning mechanism 38b is disposed at a position where the third wrapping cable 2c contacts the bottom of the sixth annular groove 382b. In some embodiments, the positioning mechanism 38b includes, for example, a positioning groove 38202 formed in the sixth annular groove 382b and a clamp block 206a disposed on the third wrapping cable 2c. The clamp block 206a is locked in the positioning groove 38202. However, the sixth positioning mechanism 38b is not limited to such a structure. In some embodiments, the sixth positioning mechanism 38b includes, for example, a fixture that fixes the bottom of the third wrapping cable 2c and the bottom of the second pivot ring 382.

[0423] Referring to FIG. 97, the seat 3 is in a relatively low swing position. Referring to FIG. 98, the seat 3 swings backward in the first direction T1 with respect to the main frame 1. Referring to FIG. 99, the seat 3 swings forward in the second direction T2 with respect to the main frame 1. In another modified embodiment, when the seat 3 swings back and forth with respect to the main frame 1, due to the action of the second wrapping cable 2b, the intermediate member 235, and the third wrapping cable 2c, the seat 3 rotates at a constant angle with respect to the swing housing 23, correcting the rotation of the swing housing 23 with respect to the main frame 1, thereby ensuring that the seat 3 is kept horizontal during swinging.

[0424] The eighth embodiment

[0425] Figures 100 and 108 illustratively show the structure of a baby carrier according to the eighth embodiment of the present invention. The baby carrier provided in this embodiment is a modified version of the seventh embodiment. When there is no contradiction, for the structure of the components in this embodiment and the connection relationship between these components, reference can be made to the description of the seventh embodiment. The differences between this embodiment and the seventh embodiment lie in the connection structure for connecting the seat 3 and the swing bracket assembly 2 to the main frame 1, and the implementation of the swing lock mechanism for locking the swing of the seat 3, and these differences will be mainly described below.

[0426] Referring to FIGS. 100 to 103, in this embodiment, the swing bracket assembly 2 and the slide pin 392 are attached onto the seat 3. FIGS. 101 and 102 show an example of the structure for removably connecting the swing bracket assembly 2 to the main frame 1. A first connection member 107 is attached to the swing bracket assembly 2. The first connection member 107 is pivotally connected to the swing bracket assembly 2 and is removably locked to the first pivot portion 183 of the fourth mounting housing 18 of the main frame 1. The seat 3 can be removed from the main frame 1 together with the swing bracket assembly 2.

[0427] Referring to FIGS. 103 to 105, the swing bracket assembly 2 includes a swing housing 23. For the pivot connection between the swing housing 23 and the seat 3, reference can be made to the description of the first embodiment. In this embodiment, a pivot recess 10a is formed in the swing housing 23, and the pivot recess 10a and the second receiving portion 232 are arranged on different sides of the swing housing 23. In this embodiment, the first receiving portion 231 of the foregoing embodiment may not be provided. The first connecting member 107 has a circular table 1072, and the circular table 1072 is sleeved in the pivot recess 10a and is rotatable relative to the pivot recess 10a. In some embodiments, the position of the circular table 1072 on the first connecting member 107 and the position of the pivot recess 10a on the swing housing 23 may be interchanged. In some embodiments, the pivot recess 10a and the circular table 1072 are fixed by a third axial limiting mechanism 108 configured to limit the axial movement between the pivot recess 10a and the circular table 1072. In some embodiments, the third axial limiting mechanism 108 is, for example, a bolt or a rivet. The bolt or the rivet can also function as a pivot for both the swing housing 23 and the circular table 1072. In an embodiment where the seat 3 is removable from the main frame 1 together with the swing bracket assembly 2, when the seat 3 is removed from the main frame 1, the swing housing 23 remains on the seat 3, and the first connecting member 107 remains on the swing housing 23 under the action of the third axial limiting mechanism 108, thereby avoiding the loss of the first connecting member 107.

[0428] Referring to FIG. 101, the seventh housing portion 181 of the fourth mounting housing 18 includes a first clamp recess 1a. The first clamp recess 1a functions as a first pivot portion 183. Referring to FIG. 102, the first connecting member 107 includes a first lock platform 1071, and the first lock platform 1071 is adapted to be inserted into the first clamp recess 1a along the direction from top to bottom, thereby realizing the connection between the swing housing 3 and the support frame 1. In some embodiments, the positions of the first clamp recess 1a on the fourth mounting housing 18 and the first lock platform 1071 on the first connecting member 107 may be interchanged.

[0429] Referring to FIGS. 101 and 102, in some embodiments, a first engagement mechanism 178 is disposed between the first lock platform 1071 and the first clamp recess 1a, and is configured to prevent the first lock platform 1071 from being easily disengaged from the first clamp recess 1a. The first engagement mechanism 178 includes, for example, a boss 1782 and a recess 1781 that engage with each other, and the boss 1782 and the recess 1781 are formed on the first lock platform 1071 and the first clamp recess 1a, respectively.

[0430] Referring to FIGS. 101 and 102, in some embodiments, a slide pin 392 is attached to the second connecting member 208, and the second connecting member 208 is detachably connected to the fourth mounting housing 18, thereby realizing a detachable connection of the slide pin 392 to the main frame 1. More specifically, in some embodiments, the seventh housing portion 181 of the fourth mounting housing 18 includes a second clamp recess 1b. The second connecting member 208 includes a second lock platform 2081, and the second lock platform 2081 is adapted to be inserted into the second clamp recess 1b. In some embodiments, the positions of the second clamp recess 1b on the fourth mounting housing 18 and the second lock platform 2081 on the second connecting member 208 may be interchanged.

[0431] Referring to FIGS. 101 and 102, in some embodiments, a second engagement mechanism 278 is provided between the second lock platform 2081 and the second clamp recess 1b, and the second lock platform 2081 is configured not to be easily detached from the second clamp recess 1b. The second engagement mechanism 278 includes, for example, a boss 2782 and a recess 2781 that engage with each other, and the boss 2782 and the recess 2781 are formed on the second lock platform 2081 and the second clamp recess 1b, respectively.

[0432] Referring to FIGS. 103 and 108, in some embodiments, the slide pin 392 is a bolt, and the end of the bolt is configured to pass through the second connecting member 208 and the slide groove 393 and be connected to the nut 3925. In other embodiments, the slide pin 392 is connected to the second connecting member 208 by an interference fit or fixedly connected to the second connecting member 208 in other ways. In embodiments where the seat 3 is removable from the main frame 1 together with the swing bracket assembly 2, after the seat 3 is removed from the main frame 1, the slide pin 392 and the second connecting member 208 remain connected to the main frame 1, thereby reducing the possibility of the slide pin 392 and the second connecting member 208 being lost. In some embodiments, the second connecting member 208 further includes a protective sleeve 2082 connected to the second lock platform 2081, and the slide pin 392 is configured to pass through the protective sleeve 2082. The end of the protective sleeve 2082 away from the second lock platform 2081 abuts against the seat 3, and a part of the slide pin 392 extending from the protective sleeve 2082 can be inserted into the slide groove 393 at a short distance, thereby improving the structural strength of the slide pin 392.

[0433] Referring to FIG. 103, in this embodiment, the lock hole 30 of the seat 3 is located outside the slide groove 393, and the swing of the seat 3 is locked by the lock pin 62 of the first swing lock mechanism 6 instead of controlling the axial expansion and contraction of the slide pin 392.

[0434] In some embodiments, the structure of the first swing lock mechanism 6 is the same as the structure of the fifth swing lock mechanism 6a illustrated in the first embodiment. The first swing lock mechanism 6 is attached to the fourth mounting housing 18, and by controlling the axial expansion and contraction of the lock pin 62, the swing of the seat 3 is locked or released.

[0435] FIGS. 103 to 107 show another embodiment of the first swing lock mechanism 6 attached to the swing housing 23 of the swing bracket assembly 2, for example. Specifically, the first swing lock mechanism 6 includes a first release member 61, a lock pin 62, and a first elastic element 63. The lock pin 62 is configured to expand and contract in a direction parallel to the swing axis about which the seat 3 swings with respect to the main frame 1. The first elastic element 63 is configured to apply an elastic force to the lock pin 62, whereby the lock pin 62 extends and is inserted into the lock hole 30. The first release member 61 is operatively connected to the lock pin 62 and pushes the lock pin 62 to pull it out of the lock hole 30. The moving direction of the first release member 61 is perpendicular to the extending and pulling-out direction of the lock pin 62.

[0436] Referring to FIGS. 103 to 106, in some embodiments, the first release member 61 has a first connection hole 6101, and the lock pin 62 has a first cylinder 6201. The first connection hole 6101 has a first inclined wall 61011, and the first cylinder 6201 is configured to be inserted into the first connection hole 6101. The first release member 61 has an unlock position and a lock position, and the movement of the first release member 61 between the unlock position and the lock position controls the extension and contraction of the lock pin 62. When the first release member 61 is in the lock position shown in FIG. 106, the lock pin 62 extends outward and is inserted into the lock hole 30. When the first release member 61 moves from the lock position to the unlock position along the direction of the arrow shown in FIG. 106, the first inclined wall 61011 abuts against the first cylinder 6201. The first cylinder 6201 is supported by the first inclined wall 61011, pulls the lock pin 62 out of the lock hole 30, and can swing the seat 3 back and forth relative to the main frame 1. In some embodiments, the positions of the first connection hole 6101 of the first release member 61 and the first cylinder 6201 of the lock pin 62 may be interchanged.

[0437] Referring to FIGS. 104 and 105, the swing housing 23 has a first side portion 2305 that slidably engages with the first release member 61 and a second side portion 2306 that slidably engages with the lock pin 62. The first side portion 2305 and the second side portion 2306 are perpendicular to each other. An inclined guide wall 23061 is formed on the wall of the second side portion 2306, and the first cylinder 6201 is guided by the inclined guide wall 23061 and enters the first connection hole 6101.

[0438] Referring to FIG. 106, in some embodiments, a first limiting portion 61012 is provided at one end of the first inclined wall 61011. The first limiting portion 61012 engages with the first cylinder 6201 and is configured to hold the first release member 61 in the unlock position and hold the lock pin 62 in a state of being pulled out of the lock hole 30.

[0439] Referring to FIG. 107, in some embodiments, the first elastic element 63 is a spring sandwiched between the swing housing 23 and the lock pin 62. The first release member 61 has an avoidance hole 6102 through which the first elastic element 63 can pass. When the first release member 61 moves from the unlock position to the lock position, and the first cylinder 6201 is removed from the first limiting portion 61012 (shown in FIG. 106), it is understood that the lock pin 62 driven by the first elastic element 63 automatically extends and is inserted into the lock hole 30. When the lock pin 62 is inserted into the lock hole 30, the swing housing 2 and the seat 3 cannot rotate relative to each other, the seat 3 cannot swing relative to the main frame 1, and the swing of the seat 3 is locked.

[0440] In the embodiments shown in FIGS. 102 to 107, an example is shown in which the first swing lock mechanism 6 is installed in the swing housing 23 of the swing bracket assembly 2. However, it goes without saying that in some embodiments, the first swing lock mechanism 6 may be installed, for example, in the fourth mounting housing 18 of the main frame 1.

[0441] The Ninth Embodiment

[0442] FIGS. 109 and 117 exemplarily show the structure of a baby carrier according to the ninth embodiment of the present invention. The baby carrier provided in this embodiment is a modified version of the eighth embodiment described above. When there is no contradiction, for the structure of each component and the connection relationship between each component in this embodiment, reference can be made to the description of the eighth embodiment. The difference between this embodiment and the eighth embodiment lies in the implementation of the first swing lock mechanism 6, which will be mainly described below.

[0443] Referring to FIGS. 111 and 112, the first swing lock mechanism 6 includes a first release member 61, a lock pin 62, a first elastic element 63, and a mounting post 64. In this embodiment, the first swing lock mechanism 6 is shown by taking the first swing lock mechanism 6 installed in the swing housing 23 as an example. In some embodiments, the first swing lock mechanism 6 may be installed in the fourth mounting housing 18 of the main frame 1.

[0444] Referring to FIGS. 111, 112, and 114, the lock pin 62 is fitted to the mounting post 64 and is extendable and retractable in a direction parallel to the swing axis of the seat 3, that is, in a direction parallel to the axis about which the seat 3 swings with respect to the main frame 1. The first elastic element 63 applies an elastic force to the lock pin 62 and extends the lock pin 62 so as to be inserted into the lock hole 30. The first release member 61 is operatively connected to the lock pin 62, and the moving direction of the first release member 61 is perpendicular to the extending and retracting direction of the lock pin 62. Referring to FIG. 113, in some embodiments, the swing housing 23 has a groove structure 23071 for guiding the movement of the first release member 61, and the swing housing 23 also has an opening 2307a that allows the first push block 613 of the first release member 61 to extend outward.

[0445] Referring to FIGS. 111 to 114, in some embodiments, the lock pin 62 is fitted to the mounting post 64. When the lock pin 62 in the locked position is pushed by the first release member 61, the lock pin 62 moves axially while rotating around the mounting post 64, and the lock pin 62 retracts from the lock hole 30. For example, a second connection hole 6401 is formed in the outer peripheral wall of the mounting post 64, and the second connection hole 6401 has a second inclined wall 64011. A second cylinder 6202 is disposed on the inner peripheral wall of the lock pin 62, and the second cylinder 6202 is configured to extend into the second connection hole 6401, and the lock pin 62 remains connected to the mounting post 64. In some embodiments, for example, the lock pin 62 has an elastic arm 6222, and the second cylinder 6202 is disposed on the elastic arm 6222.

[0446] The first release member 61 has an unlock position and a lock position. By moving between the unlock position and the lock position of the first release member 61, the expansion and contraction of the lock pin 62 with respect to the mounting post 64 is controlled. When the first release member 61 is in the lock position shown in Fig. 117, the lock pin 62 is inserted into the lock hole 30, and the seat 3 cannot swing back and forth. When the first release member 61 moves from the lock position to the unlock position along the direction of the arrow in Fig. 117, the first release member 61 rotationally drives the lock pin 62 with respect to the mounting post 64, and the second inclined wall 64011 abuts against the second cylinder 6202. The second cylinder 6202 is pushed by the second inclined wall 64011 to move the lock pin 62 in the axial direction, retract it from the lock hole 30, and swing the seat 3 back and forth with respect to the main frame 1. In some embodiments, the positions of the second connection hole 6401 on the mounting post 64 and the second cylinder 6202 on the lock pin 62 may be interchanged.

[0447] Referring to Fig. 113, in some embodiments, a second limiting portion 64012 is provided at one end of the second inclined wall 64011. The second limiting portion 64012 is configured to engage with the second cylinder 6202. Thereby, the first release member 61 stays at the unlock position, and the lock pin 62 is maintained in a state of being retracted from the lock hole 30. The first elastic element 63 may be a spring sandwiched between the mounting post 64 and the lock pin 62. When the first release member 61 moves from the unlock position to the lock position along the direction indicated by the arrow in Fig. 115, when the second cylinder 6202 is disengaged from the second limiting portion 64012, it can be understood that the lock pin 62 driven by the first elastic element 63 automatically extends and is inserted into the lock hole 30. When the lock pin 62 is inserted into the lock hole 30, the swing housing 2 and the seat 3 cannot rotate relative to each other, and the seat 3 cannot swing with respect to the main frame 1, and the swing of the seat 3 is locked.

[0448] Referring to FIGS. 111 and 112, in some embodiments, the first release member 61 is connected to the lock pin 62 via a crank-slider mechanism 605. The crank-slider mechanism 605 includes a cylinder 6051 and an elongated groove 6052, which are slidably engaged. The cylinder 6051 is disposed, for example, on the protrusion 625 of the lock pin 62, and the elongated groove 6052 is disposed, for example, on the extension plate 615 of the first release member 61. The crank-slider mechanism 605 converts the translational movement of the first release member 61 into the rotational movement of the lock pin 62. In some embodiments, the positions of the cylinder 6051 on the lock pin 62 and the elongated groove 6052 on the first release member 61 may be interchanged.

[0449] Referring to FIGS. 111, 113, and 116, a seventh positioning mechanism 635 is disposed between the swing housing 23 and the first release member 61, and the seventh positioning mechanism 635 is configured to hold the first release member 61 in the unlocked position or the locked position. In some embodiments, the seventh positioning mechanism 635 includes two rib plates 6351 and 6353 disposed on the first release member 61 and two clamp portions 6352 and 6354 disposed on the swing housing 23. The two rib plates 6351 and 6353 extend from the extension plate 615 and are spaced apart in the moving direction of the first release member 61. Referring to FIG. 116, when the first release member 61 moves to the unlocked position, the rib plate 6351 crosses the clamp portion 6352 and engages with the clamp portion 6352 to hold the first release member 61 in the unlocked position. Similarly, when the first release member 61 moves to the locked position, the rib plate 6353 crosses the clamp portion 6354 and engages with the clamp portion 6354 to hold the first release member 61 in the locked position. The embodiments of the seventh positioning mechanism 635 are not limited to the above examples.

[0450] The technical features of the above embodiments can be arbitrarily combined. For the sake of brevity, not all possible combinations of the technical features of the above embodiments are described, but as long as there is no contradiction in the combination of these technical features, these combinations should be regarded as being within the scope described in this specification.

[0451] The above embodiments are only some embodiments of the present invention. Although the description is relatively specific and detailed, it does not limit the scope of the present invention. Those skilled in the art should note that various changes and improvements can be made without departing from the concept of the present invention, and all of these changes and improvements are within the protection scope of the present invention. Therefore, the protection scope of the present invention should follow the scope of the claims.

Explanation of Reference Numerals

[0452] 1 Main Frame 1a First Clamping Recess 1b Second Clamping Recess 101 Front Leg Support 102 Rear Leg Support 1031 Front Crossbar 1032 Rear Crossbar 104 Folding Member 107 First Connecting Member 1071 First Locking Platform 1072 Circular Table 108 Third Axial Limiting Mechanism 10a Pivot Recess 11 Support Pipe 110 First Through Hole 1101 Hole 1105 Flange 114 Second Axial Guide Portion 15 First Mounting Housing 150 First Sleeve Portion 1501 Hole 1503 Third Through Hole 1505 First Opening 1506 Second Opening 151 First Housing Portion 152 Second housing part 1520 Mounting hole 1521 Structure 153 Restoration spring 154 Operation button 1541 Pin shaft 1542 Mounting hole 16 Second mounting housing 160 Second sleeve part 1601 Hole 1605 Third opening 1606 Fourth opening 161 Third housing part 162 Fourth housing part 1621 Structure 163 Restoration spring 164 Operation button 1641 Pin shaft 1642 Mounting hole 169 Rotation shaft 17 Third mounting housing 170 Third sleeve part 1701 Limiting recess 17011 First limiting wall 17012 Second limiting wall 1702 Limiting recess 17021 Third limiting arm 17022 Fourth limiting arm 1703 Hole 1704 Hole 171 Fifth housing part 1712 Sleeve 172 Sixth housing part 1721 Hole socket 174 Operation button 178 First engaging mechanism 1781 Recess 1782 Boss 179 Screw 18 Fourth mounting housing 180 Fourth sleeve part 181 Seventh housing part 1810 Fourth through hole 1811 Shaft 1812 Hollow column 182 Eighth housing part 1820 Mounting hole 183 First pivot part 183a First positioning mechanism 183b Third positioning mechanism 18301 Positioning groove 18302 Groove 18303 Positioning groove 1831 First tooth part 1832 Mounting part 18321 Second guide groove 18322 First elastic arm 18323 Protruding finger 1833 First pivot ring 1833a First annular groove 1833b Third annular groove 18331 First guide groove 18332 Locking part 18333 Protruding rib 184 Operation button 189 Screw 2 Swing bracket assembly 2a First wrapping cable 2b Second wrapping cable 2c Third wrapping cable 201 First shaft sleeve 201a Clamp block 2011 Axial guide groove 202 Second shaft sleeve 202a Clamp block 203a Clamp block 204a Clamp block 205a Clamp block 206a Clamp block 208 Second connecting member 2081 Second locking platform 2082 Protection sleeve 21 Swing arm 2101 First positioning recess 2102 Step 1 2103 Step 2 2105 Step 3 211 Pivot 2110 Central hole 2111 First flat head part 2113 Flat head connection part 2115 Prism 2116 Lock groove 2117 Positioning groove 219 Pivot 22 Support frame 221 First support rod 222 Second support rod 223 First cross bar 224 Second cross bar 225 Third cross bar 23 Swing housing 230 Mounting hole 2301 Cover 2302 Fence 2303 Opening 2305 First side part 2306 Second side part 23061 Inclined guide wall 23071 Groove structure 23072 Opening 2308 Guide structure 2309 Support column 231 First receiving part 2311 First axial limiting mechanism 23111 Limiting step 23112 Elastic stop block 2312 Second axial limiting mechanism 23121 Second elastic arm 231211 Protruding finger 232 Second receiving part 233 Seventh elongated hole 2331 Elastic claw 235 Intermediate member 235a Fourth positioning mechanism 235b Fifth positioning mechanism 23501 Fourth annular groove 23502 Fifth annular groove 2351 Column 2352 Wheel body 2352a Positioning groove 2352b Fifth positioning mechanism 26 Connecting piece 260 Third flat hole 27 Spring 278 Second positioning mechanism 2781 Recess 2782 Boss 28 Connector 280 Projection 281 Locking part 2810 Mounting hole 29 Auxiliary swing arm 291 Pivot 292 Pivot 293 Shaft sleeve 295 Fastener 3 Seat 30 Locking hole 304 Main groove 305 Base 306 Safety fence 3060 Positioning groove 3062 Groove 30621 Locking hole 307 Backrest 3071 Seat part 308 Dinner plate 309 Footrest 3091 Pivot 31 First positioning groove 32 Second positioning groove 33 First slide groove 331 Third positioning groove 332 Fourth positioning groove 333 Fifth positioning groove 34 Second slide groove 35 Third slide groove 351 Fourth elongated hole 36 Fourth slide groove 361 Shield plate 38 Second pivot part 38a Second positioning mechanism 38b Sixth positioning mechanism 381 Second tooth part 382 Second pivot ring 382a Second annular groove 382b Sixth annular groove 3820 Inner hole 38201 Positioning groove 38202 Positioning groove 39 Seat holding mechanism 391 Gear transmission system 3910 Limiting groove 3911 Driving gear 39111 Third tooth part 39112 Fourth tooth part 392 Slide pin 3921 First part 3922 Second part 3923 Second annular flange 3925 Nut 393 Slide groove 4 Swing limiting mechanism 401 First side wall 402 Second side wall 41 Fixed member 410 Second through hole 4101 Axial guiding rib 4106 Step 4107 Protruding bar 4108 Step 4109 Limiting flange 4111 First limiting surface 4112 Second limiting surface 411 Limiting groove 41100 Central hole 41101 Groove opening 41102 Groove bottom 41103 Mounting hole 4113 First axial guiding part 41131 Side wall 4115 Guiding part 4117 Ratchet part 42 Contact member 420 Engagement opening 421 First parallel plane pair 422 Second parallel plane pair 423 First flat hole 424 Positioning hole 425 First plane 426 Second plane 427 First groove part 4271 First end wall 4272 Second end wall 4273 Groove bottom 428 Second groove part 43 Limiting member 43a First region 43b Second region 430 Opening 4301 First hole part 43011 First wall 43012 Second wall 4302 Groove bottom 4307 Limiting part 4309 Receiving concave part 431 Clamping part 435 Force receiving plate 4350 Central hole 4351 Avoidance opening 436 Arm 4363 First clamping block 4365 Second clamping block 45 Second elastic element 46 Third elastic element 47 Third swing lock mechanism 471 Driving wheel 4710 Central hole 47101 Bevel 47102 Bevel 4711 Ratchet groove part 47111 First ratchet groove 47112 Second ratchet groove 4713 Protruding ring 472 Pressing member 4721 Pressing part 4722 Pushing part 47220 Pushing arm 47221 Pushing step 47222 Hook 47223 protruding finger 481 First swing limiting mechanism 4810 First groove 48101 End wall 4811 First stop portion 482 Second swing limiting mechanism 4820 Second groove 48201 End wall 4821 Second stop portion 483 Fourth swing lock mechanism 4831 Fourth release member 48311 Operation portion 48312 Third post 4832 Lock block 48320 Recess 4833 Driving member 48330 Third connection hole 483301 Third inclined wall 483302 Third limiting portion 48331 First side surface portion 48332 Second side surface portion 48333 Third side surface portion 48338 Receiving hole 4834 Fourth elastic element 5 First limiting structure 51 Spring clip 52 First positioning sleeve 521 Second flat hole 522 Radial through groove 523 Positioning post 6 First swing lock mechanism 6a Fifth swing lock mechanism 601 Hole 605 Crank slider mechanism 6051 Cylinder 6052 Elongated groove 61 First release member 61 Fifth release member 6101 First connection hole 61011 First inclined wall 61012 First limiting portion 6102 Avoidance hole 611 First elongated hole 611a Eighth elongated hole 612 First stop boss 612a Second stop boss 613 First push block 613a Fifth push block 615 Extension plate 616a Lock protrusion 62 Lock pin 620 First annular flange 6201 First cylinder 6202 Second cylinder 621 First component 622 Second component 6222 Elastic arm 63 First elastic element 635 Seventh positioning mechanism 6351 Rib plate 6352 Clamping part 6353 Rib plate 6354 Clamping part 63a Fifth elastic element 64 Mounting post 6401 Second connection hole 64011 Second inclined wall 64012 Second limiting part 7 Second limiting structure 71 Bolt 711 Tail end 712 Head 72 Nut 720 Second positioning recess 8 Second swing lock mechanism 81 Second release member 811 Second elongated hole 812 Second push block 82 First connecting member 821 First connecting pin 822 Third elongated hole 83 Engaging member 830 Central hole 831 Connecting protrusion 8311 Second connecting pin 832 Engaging boss 833 Avoidance part 9 Locking device 901 First end 9011 First push bevel 902 First end 9021 Second push bevel 91 First blocking member 911 First connection boss 9111 Fifth elongated hole 9112 First recess 9113 First positioning post 9115 Third receiving groove 92 Second blocking member 921 Second connection boss 9211 Sixth elongated hole 9212 Second recess 9213 Second receiving groove 9215 Second positioning post 93 Elastic element 931 First spring 932 Second spring 94 Connection bracket 940 Mounting hole 941 First surface 942 Second surface 945 Fastener 95 Third release member 950 Threaded hole 951 First receiving groove 952 Pressing recess 96 Second connecting member 961 First protruding post 962 Second protruding post 963 Pivot 97 First wedge 98 Second wedge

Claims

1. A main frame configured to be supported on the ground, a swing bracket assembly, and a seat pivotally connected to the main frame via the swing bracket assembly. A baby carrier.

2. The swing bracket assembly includes swing arms, each of the swing arms being pivotally connected to the main frame, the baby carrier further includes a swing limiting mechanism, the swing limiting mechanism being disposed between each of the swing arms and the main frame, The baby carrier according to claim 1.

3. Each of the swing arms is provided with a pivot, and the swing arm is pivotally connected to the main frame via the pivot, The swing limiting mechanism, a fixing member fixed to the main frame and having a first limiting surface and a second limiting surface, and a contact member connected to the pivot and disposed between the first limiting surface and the second limiting surface, the contact member limiting the swing of the swing arm by contacting the first limiting surface and the second limiting surface. The baby carrier according to claim 2.

4. The fixing member includes a limiting groove, the first limiting surface and the second limiting surface are formed on the side wall of the limiting groove, or a limiting member is provided in the limiting groove, and the first limiting surface and the second limiting surface are formed on the limiting member. The baby carrier according to claim 3.

5. The limiting member includes an opening through which the pivot can pass, and the first limiting surface and the second limiting surface are formed on the wall of the opening. The baby carrier according to claim 4.

6. The side wall of the limiting groove includes a first side wall and a second side wall parallel to each other, the first limiting surface and the second limiting surface are both formed on the first side wall and both formed on the second side wall, the contact member is configured to be inserted into the limiting groove and includes a first pair of parallel surfaces and a second pair of parallel surfaces, when the swing arm swings to contact the first limiting surface, the first pair of parallel surfaces prevents the swing arm from continuously swinging in a first direction, and when the swing arm contacts the second limiting surface, the second pair of parallel surfaces prevents the swing arm from continuously swinging in a second direction opposite to the first direction. The baby carrier according to claim 4.

7. The main frame is provided with a support pipe, the fixing member is provided in a sleeve shape inside the support pipe, the limiting groove is configured to extend in the longitudinal direction along the fixing member and has a groove opening, and the abutting member is inserted into the limiting groove from the groove opening. The support pipe has a first through hole, the fixing member has a second through hole, the pivot is configured to pass through the first through hole and the second through hole, and the axis of the support pipe is substantially perpendicular to the axis of the pivot. The baby carrier according to claim 4.

8. A first shaft sleeve is fitted to the pivot, the first shaft sleeve is disposed on one side of the limiting groove, and is installed in the second through hole. And / or An end portion of the pivot is provided with a first flat head portion, the abutting member is provided with a first flat hole that engages with the first flat head portion, the first flat head portion is provided with a first limiting structure, and the first limiting structure is configured to prevent the abutting member from disengaging from the first flat head portion. The baby carrier according to claim 7.

9. A first step is formed at the base of the first flat head portion, and a first positioning recess is formed in the first flat head portion. The first limiting structure includes a spring clip disposed on the other side of the limiting groove and a first positioning sleeve. The first positioning sleeve fits onto the first flat head portion and has a radial through slot for receiving the spring clip. The spring clip is inserted into the radial through slot and is configured to engage with the first positioning recess, whereby the abutting member is clamped between the first step and the first positioning sleeve. The baby carrier according to claim 8.

10. The first positioning sleeve is formed with a second flat hole and is configured to engage with the first flat head portion. Positioning holes and positioning posts are respectively provided on the end faces of the abutting member and the first positioning sleeve on opposite sides of each other, and these engage with each other. The baby carrier according to claim 9.

11. The pivot and the swing arm are integrally formed, and / or The first positioning sleeve is installed in the second through hole, and / or Axial guide grooves and axial guide ribs that engage with each other are provided on the outer peripheral surface of the first shaft sleeve and the hole wall of the second through hole, respectively. The baby carrier according to claim 9.

12. The baby carrier further includes a first swing lock mechanism for locking the swing of the seat. The baby carrier according to claim 1.

13. The first swing lock mechanism includes a first release member, a lock pin, and a first elastic element. The first elastic element exerts an elastic force on the lock pin and is configured to extend the lock pin outward and insert it into the lock hole of the seat. The first release member is operatively connected to the lock pin and pushes the lock pin to retract it from the lock hole. The baby carrier according to claim 12.

14. A first annular flange is provided at an intermediate portion of the lock pin. The first annular flange divides the lock pin into a first portion and a second portion. The first portion is configured to be inserted into the lock hole, and the first elastic element fits onto the second portion. The first release member has a lock release position and a lock position. The first release member includes a first elongated hole, and a first stop boss extending obliquely is formed on the hole wall of the first elongated hole. The first annular flange is sandwiched between the first stop boss and the first elastic element. When the first release member moves to the lock release position, the first stop boss pushes the first annular flange to retract the lock pin. The baby carrier according to claim 13.

15. The main frame further includes a first mounting housing. The first swing lock mechanism is installed within the first mounting housing. The first mounting housing includes a third through hole, and the lock pin is configured to protrude from the third through hole. The first release member is movable relative to the first mounting housing and can be switched to the lock release position or the lock position. The first release member includes a first push block, and the first mounting housing includes a first opening through which the first push block can pass. The baby carrier according to claim 14.

16. The first swing lock mechanism is installed on the main frame or the swing bracket assembly. The first swing lock mechanism includes a first release member, a lock pin, and a first elastic element. The moving direction of the first release member is perpendicular to the telescopic direction of the lock pin. The baby carrier according to claim 12.

17. One of the first release member and the lock pin has a first connection hole, the other of the first release member and the lock pin has a first cylinder, the first connection hole has a first inclined wall, and the first cylinder is configured to be inserted into the first connection hole. The first release member has a lock release position and a lock position. When the first release member is in the lock position, the lock pin is inserted into the lock hole. When the first release member moves from the lock position to the lock release position, the first inclined wall abuts against the first cylinder and retracts the lock pin from the lock hole. The baby carrier according to claim 16.

18. A first limiting portion is provided at one end of the first inclined wall, and the first limiting portion is configured to engage with the first cylinder to hold the first release member in the lock release position. The baby carrier according to claim 17.

19. The swing bracket assembly includes a swing housing, the first swing lock mechanism is attached to the swing housing, and the swing housing has a first side portion that slidably engages with the first release member and a second side portion that slidably engages with the lock pin. The baby carrier according to claim 17.

20. A first connection hole is formed in the first release member, the first cylinder is disposed on the lock pin, an inclined guide wall is formed in the second side portion, and the first cylinder is guided by the inclined guide wall and enters the first connection hole. The baby carrier according to claim 19.

21. The first swing lock mechanism further includes a mounting post, the lock pin fits into the mounting post and is rotatable relative to the mounting post. One of the mounting post and the lock pin has a second connection hole, the other of the mounting post and the lock pin has a second cylinder, the second connection hole has a second inclined wall, and the second cylinder is configured to be inserted into the second connection hole. The first unlocking member has an unlocking position and a locking position. When the first unlocking member is in the locking position, the locking pin is inserted into the locking hole. When the first unlocking member moves from the locking position to the unlocking position, the first unlocking member drives the locking pin to rotate with respect to the mounting post, and at the same time, the second inclined wall abuts against the second cylinder and drives the locking pin to retract from the locking hole. The baby carrier according to claim 16.

22. A second restricting portion is provided at one end of the second inclined wall, and the second restricting portion is configured to engage with the second cylinder to hold the first unlocking member in the unlocking position. The baby carrier according to claim 21.

23. The swing bracket assembly includes a swing housing, the first swing locking mechanism is installed in the swing housing, and the first unlocking member is connected to the locking pin via a crank-slider mechanism. The baby carrier according to claim 21.

24. A seventh positioning mechanism is disposed between the swing housing and the first unlocking member, and the seventh positioning mechanism is configured to hold the first unlocking member in the unlocking position or the locking position. The baby carrier according to claim 23.

25. The opening includes a first hole portion, the first hole portion includes a first wall and a second wall, and the first restricting surface and the second restricting surface are both formed on the first wall and both formed on the second wall. The abutting member is a second flat head portion formed on the pivot, the second flat head portion is adjacent to the first end portion of the pivot, and includes a first plane and a second plane that are parallel to each other. The first plane and the second plane abut against the first restricting surface and the second restricting surface during the swinging of the swing arm to limit the swinging angle of the swing arm. The baby carrier according to claim 5.

26. The opening further includes a second hole portion communicating with the first hole portion. The position of the restricting member in the restricting groove is adjustable, and at least a part of the second flat head portion engages with the second hole portion to lock the swinging of the swing arm. The baby carrier according to claim 25.

27. The first hole portion is formed by butting two sector-shaped sub-holes, and two limiting portions are formed at the joint of the two sector-shaped sub-holes. When the second flat head portion engages with the second hole portion, the second flat head portion has a portion sandwiched between the two limiting portions. The baby carrier according to claim 26.

28. The limiting groove has a groove opening and a groove bottom. One of the second hole portion and the first hole portion is adjacent to the groove bottom of the limiting groove, and the other of the second hole portion and the first hole portion is adjacent to the groove opening of the limiting groove. A second elastic element is installed in the limiting groove and is sandwiched between the groove bottom and the limiting member. When a pressing force is applied to the limiting member, the limiting member overcomes the elastic force of the second elastic element and moves toward the groove bottom. When the pressing force is released, the second elastic element moves the limiting member toward the groove opening so that the first hole portion and the second hole portion can selectively engage with the second flat head portion. The baby carrier according to claim 26.

29. A support pipe is provided on the main frame. The fixing member is covered with a sleeve inside the support pipe. The limiting groove is configured to extend in the longitudinal direction along the fixing member and has a groove opening. The limiting member is inserted into the limiting groove from the groove opening. The support pipe has a first through hole, the fixing member has a second through hole, the pivot is configured to pass through the first through hole and the second through hole, and the axis of the support pipe is substantially perpendicular to the axis of the pivot. The baby carrier according to claim 28.

30. A second shaft sleeve fits onto the pivot. The second shaft sleeve is disposed on one side of the limiting groove and is disposed so as to pass through the second through hole, and / or The pivot and the swing arm are of separate structures. A flat head connection portion is provided on the end face of the second end portion of the pivot and protrudes therefrom. A connection piece is provided on the swing arm. The connection piece includes a third flat hole that engages with the flat head connection portion. The pivot is provided with a second limiting structure. The second limiting structure is configured to prevent the connection piece, the pivot, and the limiting member from separating from each other. The baby carrier according to claim 29.

31. The pivot has a central hole, a second step is formed at the base of the second flat head portion, and a third step is formed at the base of the flat head connection portion. The second limiting structure includes a bolt and a nut. The tail end of the bolt is inserted into the central hole from the second end of the pivot, exits the central hole from the first end of the pivot and is screwed into the nut. The nut is disposed on the other side of the limiting groove and is located in the second through hole. The connecting piece is sandwiched between the third step and the head of the bolt, and the limiting member is sandwiched between the second step and the nut. The baby carrier according to claim 30.

32. The pivot further includes a prism protruding from the end face of the second flat head portion, and the nut forms a second positioning recess that engages with the prism. The baby carrier according to claim 31.

33. The baby carrier further includes a second swing lock mechanism, and the second swing lock mechanism is operatively connected to the limiting member. The baby carrier according to any one of claims 28 to 32.

34. The clamping portion is disposed at the upper part near the groove opening of the limiting member. The second swing lock mechanism includes a second release member and an engaging member. The engaging member is fitted onto a rotation axis parallel to the pivot, and an engaging boss and an avoidance portion are disposed on the outer periphery of the engaging member. The second release member is configured to rotationally drive the engaging member. When the engaging boss rotates to a position where it abuts against the clamping portion, the limiting member moves toward the groove bottom. When the avoidance portion rotates to a position where it abuts against the upper part of the limiting member, the limiting member moves toward the groove opening. The baby carrier according to claim 33.

35. The second swing lock mechanism further includes a first connecting member. The first connecting member is connected between the engaging member and the second release member, and the second release member rotationally drives the engaging member via the first connecting member. The baby carrier according to claim 34.

36. The first connecting member has a curved shape. A first connecting pin is provided at one end of the first connecting member and one end of the second release member. A second elongated hole that slidably engages with the first connecting pin is provided at the other end of the first connecting member and the other end of the second release member. A connection lug is disposed on the engaging member, a second connection pin is provided on one of the second end of the first connecting member and the connection lug, and a third elongated hole that slidably engages with the second connection pin is provided on the other of the second end of the first connecting member and the connection lug. The baby carrier according to claim 35.

37. The main frame further includes a second mounting housing, and the second swing lock mechanism and the rotating shaft are installed in the second mounting housing. The second release member includes a second push block, and the second mounting housing is provided with a third opening that allows the second push block to move. The fixing member is disposed in the second mounting housing, and the second mounting housing is provided with a fourth opening that allows the swing arm to pass through. The baby carrier according to claim 34.

38. The extending direction of the limiting groove is parallel to the axial direction of the pivot, and the pivot is arranged to pass through the limiting groove. The baby carrier according to claim 4.

39. The limiting member includes a first region and a second region. The first region has the first limiting surface and the second limiting surface. The second region is adapted to engage with the abutting member to lock the swing arm. The limiting member is slidably engaged with the limiting groove and has a first position and a second position. When the limiting member is in the first position, the first region engages with the abutting member. When the limiting member is in the second position, the second region engages with the abutting member. The baby carrier according to claim 38.

40. The limiting member includes a force receiving plate and at least one arm extending from the force receiving plate. The first region and the second region are formed on the at least one arm. The baby carrier according to claim 39.

41. At least one first groove portion is provided on the abutting member, and each of the first groove portions includes a first end wall and a second end wall facing each other. The at least one arm is adapted to pass through the at least one first groove portion, and when the first end wall swings so as to abut against the respective first limiting surface, the swing arm is prevented from continuing to swing in the first direction, and when the second end wall swings so as to abut against the respective second limiting surface, the swing arm is prevented from continuing to swing in the second direction. The baby carrier according to claim 40.

42. The contact member is further provided with at least one second groove portion, and the at least one second groove portion is adapted to engage with a corresponding second region. The baby carrier according to claim 41.

43. The at least one second groove portion is formed at the groove bottom of the at least one first groove portion. A first clamp block is disposed in the second region of the at least one arm, and the first clamp block is adapted to engage with a corresponding second groove portion. The baby carrier according to claim 42.

44. The second region of the at least one arm is provided with a second clamp block, and the second clamp block is adapted to engage with a corresponding first groove portion. The baby carrier according to claim 42.

45. The limiting groove has a groove opening and a groove bottom, the force receiving plate is adjacent to the groove bottom, and the contact member is adjacent to the groove opening. A third elastic element is provided in the limiting groove, and is configured to apply a driving force to the force receiving plate to move the force receiving plate toward the groove bottom. The baby carrier further includes a third swing locking mechanism, and the third swing locking mechanism is operatively connected to the force receiving plate and drives a limiting member to switch between the first position and the second position. The baby carrier according to claim 40.

46. The third swing locking mechanism includes a driving wheel that fits onto the pivot and abuts against a side surface of the force receiving plate facing the groove bottom. A ratchet portion is provided on one of the walls of the limiting groove and one of the drive wheels, and a ratchet groove portion is provided on the other of the walls of the limiting groove and the other of the drive wheels. The ratchet groove portion includes a first ratchet groove having a first groove depth and a second ratchet groove having a second groove depth, which are sequentially arranged in the circumferential direction. The first groove depth is not equal to the second groove depth. The drive wheel moves in the axial direction and rotates in the circumferential direction when receiving a pressing force. The ratchet portion sequentially engages with the first ratchet groove and the second ratchet groove. The baby carrier according to claim 45.

47. An attachment hole is formed at the bottom of the limiting groove. The third swing lock mechanism further includes a press member, which has a press portion and a push portion extending from the press portion. The push portion extends into the limiting groove through the attachment hole. The push portion is configured to apply a pressing force to the slope of the first ratchet groove or the slope of the second ratchet groove. The baby carrier according to claim 46.

48. The third swing lock mechanism further includes a restoring spring, which is configured to drive the press member to reset, and / or The push portion includes at least one push arm extending from the press portion. A pressing step is formed at the center of each of the push arms, and hooks are formed at both ends of the push arms. The drive wheel is disposed between the pressing step and the hooks. The pressing step is configured to apply a pressing force, and the hooks are configured to hook the drive wheel after the pressing force is released. The baby carrier according to claim 47.

49. The ratchet portion is formed on the wall surface of the limiting groove, and the ratchet groove portion is formed on the drive wheel. The baby carrier according to claim 46.

50. A first axial guide portion is provided on the wall of the limiting groove, and the first axial guide portion is configured to guide the limiting member to move in the axial direction. The baby carrier according to claim 38.

51. The main frame is provided with a support pipe, the support pipe is provided with a first through hole, the axis of the first through hole is perpendicular to the axis of the support pipe, the fixing member is sleeved in the first through hole, and a second axial guide portion is formed on the hole wall of the first through hole, and is configured to guide the axial movement of the fixing member during installation. The baby carrier according to claim 38.

52. The swing bracket assembly further includes an auxiliary swing arm, and the auxiliary swing arm is configured to assist the swing arm in supporting the seat. The baby carrier according to claim 2 or 38.

53. The swing bracket assembly further includes a connector, the swing arm and the auxiliary swing arm are respectively pivotally connected to the connector, and the connector is provided with a locking portion and is configured to engage with the seat. The baby carrier according to claim 52.

54. The main frame further includes a third mounting housing, and the fixing member is disposed in the third mounting housing. A limiting recess is formed on the outside of the third mounting housing, the limiting recess has a first limiting wall and a second limiting wall, and the swing arm is configured to swing between the first limiting wall and the second limiting wall. The baby carrier according to claim 38.

55. The swing bracket assembly is pivotally connected to the main frame, the seat is pivotally connected to the swing bracket assembly, and the seat is configured to swing relative to the main frame by the swing bracket assembly. The baby carrier further includes a seat holding mechanism disposed between the main frame and the seat, and the seat holding mechanism is configured to control the seat to be kept horizontal during swinging. The baby carrier according to claim 1.

56. The main frame has a first pivot portion, the seat has a second pivot portion, and the first pivot portion and the second pivot portion are respectively pivotally connected to the swing bracket assembly. When the swing bracket assembly swings by a first angle in one direction around the first pivot portion, the seat swings by the first angle in another opposite direction around the second pivot portion due to the action of the seat holding mechanism. The baby carrier according to claim 55.

57. The swing bracket assembly includes a swing housing, and the first pivot portion and the second pivot portion are pivotally connected to the swing housing, respectively. The baby carrier according to claim 56.

58. The seat holding mechanism is attached to the swing bracket assembly and connected between the first pivot portion and the second pivot portion. The baby carrier according to claim 57.

59. The first pivot portion includes a first tooth portion, the second pivot portion includes a second tooth portion, the seat holding mechanism includes a gear transmission system, and the first tooth portion and the second tooth portion mesh with the gear transmission system, respectively. The baby carrier according to claim 58.

60. The main frame includes a fourth mounting housing, and the swing housing has a first receiving portion. The first pivot portion includes a mounting portion and a first pivot ring. The mounting portion is disposed within the fourth mounting housing, the mounting portion is sleeved within the first pivot ring, the mounting portion and the first pivot ring are non-rotatable relative to each other, and the first pivot ring is sleeved within the first receiving portion. The baby carrier according to claim 57.

61. At least a part of the outer peripheral wall of the first pivot ring is formed with a first tooth portion. The second pivot portion 38 includes a second tooth portion, and the first tooth portion meshes with the second tooth portion via a gear transmission system. The baby carrier according to claim 60.

62. The swing housing has a first receiving portion, and the first pivot portion includes a first pivot ring sleeved inside the first receiving portion. The baby carrier further includes a first axial limiting mechanism configured to limit the axial movement of the first pivot ring relative to the swing housing. The baby carrier according to claim 57.

63. The first axial direction limiting mechanism includes a limiting step formed on the wall of the first receiving portion and an elastic stop block, and the first pivot ring is clamped between the limiting step and the elastic stop block. The baby carrier according to claim 62.

64. A first guide groove is formed on the outer peripheral wall of the first pivot ring. When the first pivot ring and the swing housing are assembled, the elastic locking block is slidably engaged with the first guide groove, and the groove depth and / or width of the first guide groove gradually increases along the assembling direction of the first pivot ring. The baby carrier according to claim 63.

65. The baby carrier further includes a first swing limiting mechanism, and the first swing limiting mechanism is configured to limit the swing angle of the swing housing with respect to the main frame. The baby carrier according to claim 57.

66. The swing housing has a first receiving portion, and the first pivot portion includes a first pivot ring sleeved inside the first receiving portion. The first swing limiting mechanism includes a first groove and a first stopping portion. The first groove is formed on one of the wall of the first receiving portion and the outer peripheral wall of the first pivot ring, and the first stopping portion is disposed on the other of the wall of the first receiving portion and the outer peripheral wall of the first pivot ring. The first stopping portion is configured to extend into the first groove, and when the swing housing swings, the first stopping portion selectively abuts against one of the two end walls of the first groove. The baby carrier according to claim 65.

67. The mounting portion is cylindrical, and a protruding rib and a second guide groove that engage in an uneven fitting manner are provided between the mounting portion and the first pivot ring, and / or The mounting portion is cylindrical, a first elastic arm is disposed on the outer peripheral wall of the mounting portion, the first elastic arm has a protruding finger, a locking portion is formed on the inner peripheral wall of the first pivot ring, and the locking portion abuts against the protruding finger so that the first pivot ring is configured not to come off from the mounting portion. The baby carrier according to claim 60.

68. The swing housing has a second receiving portion. The second pivot portion includes a second pivot ring, the second pivot ring is fixedly connected to the seat, and the second pivot ring is sleeved inside the second receiving portion. The baby carrier according to claim 57.

69. The second tooth part is formed on at least a part of the outer peripheral wall of the second pivot ring, the first pivot part includes a first tooth part, and the second tooth part meshes with the first tooth part via a gear transmission system. The baby carrier according to claim 68.

70. Further comprising a second axial direction limiting mechanism, the second axial direction limiting mechanism being configured to limit the axial movement of the swing housing with respect to the second pivot ring. The baby carrier according to claim 68.

71. The second axial direction limiting mechanism includes a second elastic arm disposed in the second receiving part, and the second elastic arm is configured to pass through the inner hole of the second pivot ring and engage with an edge of the inner hole. The baby carrier according to claim 70.

72. Further comprising a second swing limiting mechanism, the second swing limiting mechanism being configured to limit the swing angle of the seat with respect to the swing housing. The baby carrier according to claim 57.

73. The swing housing has a second receiving part, and the second pivot part includes a second pivot ring sleeved inside the second receiving part. The second swing limiting mechanism includes a second groove and a second stop part. The second groove is provided on one of the wall of the second receiving part and the outer peripheral wall of the second pivot ring, and the second stop part is provided on the other of the wall of the second receiving part and the outer peripheral wall of the second pivot ring. The second stop part is configured to extend into the second groove, and when the swing housing swings, the second stop part selectively abuts against one of the two end walls of the second groove. The baby carrier according to claim 72.

74. Further comprising a fourth swing lock mechanism for locking or releasing the swing of the seat. The baby carrier according to claim 57.

75. The first pivot part includes a first tooth part, the second pivot part includes a second tooth part, the seat holding mechanism includes a gear transmission system, and the first tooth part and the second tooth part respectively mesh with the gear transmission system. The gear transmission system includes a drive gear, and a limiting groove is formed in the drive gear. The fourth swing lock mechanism is installed in the swing housing and includes a fourth release member and a lock block. The lock block is adapted to be inserted into the limiting groove, and the fourth release member is operatively connected to the lock block and drives the lock block to be removed from the limiting groove. The baby carrier according to claim 74.

76. The fourth swing lock mechanism further includes a driving member. The lock block is installed on the driving member, and the fourth release member is configured to drive the lock block via the driving member. The baby carrier according to claim 75.

77. The fourth release member is slidably engaged with the swing housing, the driving member is slidably engaged with the swing housing, and the sliding directions of the fourth release member and the driving member intersect. The baby carrier according to claim 76.

78. The driving member has a third connection hole, and the third connection hole has a third inclined wall. The swing housing has a seventh elongated hole. The fourth release member has an operation portion and a third pillar extending from the operation portion. The third pillar is configured to enter the third connection hole through the seventh elongated hole. When the fourth release member moves from the locked position to the unlocked position, the third pillar presses the third inclined wall, and the driving member can drive the lock block to be removed from the limiting groove. The baby carrier according to claim 76.

79. A third limiting portion is provided at one end of the third inclined wall. The third limiting portion is configured to engage with the third pillar to hold the fourth release member in the unlocked position. Elastic claws are provided on the hole wall of the seventh elongated hole. When the fourth release member moves to the locked position, the elastic claws clamp the third pillar to hold the fourth release member in the locked position. The baby carrier according to claim 78.

80. The driving member includes a first side portion and a second side portion facing each other, and a third side portion connected between the first side portion and the second side portion. The driving gear is disposed between the first side portion and the second side portion, and the lock block is disposed on the third side portion. The baby carrier according to claim 76.

81. The fourth swing lock mechanism further includes a fourth elastic element, and the fourth elastic element is configured to drive the lock block to be inserted into the limiting groove. The baby carrier according to claim 75.

82. The drive gear includes a third tooth portion that meshes with the first tooth portion and a fourth tooth portion that meshes with the second tooth portion, and the limiting groove is disposed between the third tooth portion and the fourth tooth portion. The baby carrier according to claim 75.

83. The first pivot portion includes a first pivot ring provided in the swing housing, and the second pivot portion includes a second pivot ring provided in the swing housing. The seat holding mechanism includes a first lacing cable, and the first lacing cable fits onto the first pivot ring and the second pivot ring. The baby carrier according to claim 57.

84. A first annular groove is formed in an outer peripheral wall of the first pivot ring, the first lacing cable is wound around the first annular groove, and a first positioning mechanism is disposed between the first lacing cable and the first pivot ring, and / or A second annular groove is formed in an outer peripheral wall of the second pivot ring, the first lacing cable is wound around the second annular groove, and a second positioning mechanism is disposed between the first lacing cable and the second pivot ring. The baby carrier according to claim 83.

85. The seat holding mechanism includes an intermediate member disposed in the swing housing, the first pivot portion includes a first pivot ring provided in the swing housing, and the second pivot portion includes a second pivot ring provided in the swing housing. The seat holding mechanism further includes a second lacing cable and a third lacing cable, the second lacing cable fits onto one position of the intermediate member and the first pivot ring, and the third lacing cable fits onto another position of the intermediate member and the second pivot ring. The baby carrier according to claim 57.

86. A third annular groove is formed in an outer peripheral wall of the first pivot ring, a fourth annular groove and a fifth annular groove are formed in an outer peripheral wall of the intermediate member with an axial interval therebetween, and a sixth annular groove is formed in an outer peripheral wall of the second pivot ring. The second wrapping cable is wound around the third annular groove and the fourth annular groove, and the third wrapping cable is wound around the fifth annular groove and the sixth annular groove. The baby carrier according to claim 85.

87. A third positioning mechanism is provided between the second wrapping cable and the first pivot ring, and a fourth positioning mechanism is arranged between the second wrapping cable and the intermediate member. A sixth positioning mechanism is provided between the third wrapping cable and the sixth annular groove. Preferably, a fifth positioning mechanism is arranged between the third wrapping cable and the fifth annular groove. The baby carrier according to claim 86.

88. The seat holding mechanism A slide pin disposed on one of the main frame and the seat, And a slide groove disposed on the other of the main frame and the seat, and When the swing bracket assembly swings with respect to the main frame, the slide pin and the slide groove are slidably engaged with each other, and the seat is controlled to be kept horizontal during swinging. The baby carrier according to claim 55.

89. The slide pin is parallel to the swing axis of the seat, and / or the slide groove is a curved groove. The baby carrier according to claim 88.

90. A lock hole is formed in the slide groove, The slide pin has a locked position protruding into the lock hole and an unlocked position retracting from the lock hole. When the slide pin is in the locked position, the swing of the seat is locked, and when the slide pin is in the unlocked position, the slide of the seat is released. The baby carrier according to claim 88.

91. Further comprising a fifth swing lock mechanism, the fifth swing lock mechanism is configured to control the expansion and contraction of the slide pin to lock or release the swing of the seat. The baby carrier according to claim 90.

92. The fifth swing lock mechanism includes a fifth release member and a fifth elastic element. The fifth release member is configured to drive the slide pin to be pulled out of the lock hole, and the fifth elastic element is configured to drive the slide pin to be inserted into the lock hole. The baby carrier according to claim 91.

93. The second annular flange is disposed at the center of the slide pin, and the second annular flange divides the slide pin into a first portion and a second portion. The first portion is configured to be inserted into the locking hole, and the fifth elastic element fits onto the second portion. The fifth release member has an eighth elongated hole, and a second stop boss extending obliquely is formed on the hole wall of the eighth elongated hole. The second annular flange is sandwiched between the second stop boss and the fifth elastic element. The baby carrier according to claim 92.

94. A locking protrusion is further formed on the hole wall of the eighth elongated hole. The locking protrusion is configured to engage with the slide pin to hold the fifth release member in the unlock position. The baby carrier according to claim 93.

95. The main frame includes a fourth mounting housing. A first connecting member is installed on the swing bracket assembly and is pivotally connected to the swing bracket assembly. The first connecting member is configured to be locked within the fourth mounting housing. The baby carrier according to claim 55.

96. The fourth mounting housing includes a first clamping recess. The first connecting member includes a first locking platform. The first locking platform is adapted to be inserted into the first clamping recess, and a first engagement mechanism is disposed between the first locking platform and the first clamping recess. The baby carrier according to claim 95.

97. The main frame includes a fourth mounting housing. The seat holding mechanism includes a slide pin and a slide groove. The slide pin is attached to a second connecting member. The second connecting member engages with the fourth mounting housing. The slide groove is formed in the seat, and the slide pin is disposed to pass through the slide groove. When the swing bracket assembly swings relative to the main frame, the slide pin and the slide groove engage slidably to control the seat to be kept horizontal during swinging. The baby carrier according to claim 55.

98. The fourth mounting housing includes a second clamping recess. The second connecting member includes a second locking platform, the second locking platform is adapted to be inserted into the second clamping recess, and a second engaging mechanism is provided between the second locking platform and the second clamping recess. The baby carrier according to claim 97.

99. The slide pin is a bolt, and the tail end of the bolt is configured to pass through the second connecting member and the slide groove and be connected to a nut. The baby carrier according to claim 97.

100. A fixing member having a first limiting surface and a second limiting surface; A swing arm having a pivot pivotable with respect to the fixing member; A contact member connected to the pivot and provided between the first limiting surface and the second limiting surface; When the contact member contacts the first limiting surface and the second limiting surface, the swing angle of the swing arm is limited. Swing mechanism.

101. The fixing member includes a limiting groove; The first limiting surface and the second limiting surface are formed on the side wall of the limiting groove, or a limiting member is provided in the limiting groove, and the first limiting surface and the second limiting surface are formed on the limiting member. The swing mechanism according to claim 100.

102. The extending direction of the limiting groove is perpendicular to the axial direction of the pivot, the limiting groove has a groove opening; The side walls of the limiting groove include a first side wall and a second side wall parallel to each other, the first limiting surface and the second limiting surface are both formed on the first side wall and both formed on the second side wall; The contact member is configured to be inserted into the limiting groove through the groove opening, and includes a first pair of parallel surfaces and a second pair of parallel surfaces; When swinging to contact the first limiting surface, the first pair of parallel surfaces prevents the swing arm from continuously swinging in a first direction, and when swinging to contact the second limiting surface, the second pair of parallel surfaces prevents the swing arm from continuously swinging in a second direction opposite to the first direction. The swing mechanism according to claim 101.

103. The extending direction of the limiting groove is perpendicular to the axial direction of the pivot, and the position of the limiting member in the limiting groove is adjustable. The limiting member is provided with an opening through which the pivot can pass. The opening includes a first hole portion and a second hole portion. The first hole portion includes a first wall and a second wall. Both the first limiting surface and the second limiting surface are formed on the first wall and both are formed on the second wall. The second hole portion is configured to engage with the contact member to lock the swing arm. The swing mechanism according to claim 101.

104. The extending direction of the limiting groove is parallel to the axial direction of the pivot. The limiting member includes a first region and a second region. The first region has a first limiting surface and a second limiting surface. The second region is adapted to engage with the contact member to lock the swing arm. The limiting member is slidably engaged with the limiting groove and has a first position and a second position. When the limiting member is in the first position, the first region engages with the contact member. When the limiting member is in the second position, the second region engages with the contact member. The swing mechanism according to claim 101.

105. The limiting member includes a force receiving plate and at least one arm extending from the force receiving plate. The first region and the second region are formed on the at least one arm. At least one first groove portion is formed on the outer periphery of the contact member. The at least one arm passes through the at least one first groove portion. The first region is configured to swing within the corresponding first groove portion. At least one second groove portion is further formed on the contact member. The second region is configured to engage with the corresponding second groove portion. The swing mechanism according to claim 104.

106. The baby carrier further includes a driving wheel that fits onto the pivot and abuts against the force receiving plate. A ratchet portion is provided on one of the wall of the limiting groove and the driving wheel, and a ratchet groove portion is provided on the other of the wall of the limiting groove and the driving wheel. The ratchet groove portion includes a first ratchet groove having a first groove depth and a second ratchet groove having a second groove depth that are sequentially arranged in the circumferential direction. The first groove depth is not equal to the second groove depth. When receiving a pressing force, the driving wheel moves in the axial direction and rotates in the circumferential direction, and the ratchet portion sequentially engages with the first ratchet groove and the second ratchet groove. The swing mechanism according to claim 105.

107. A support frame including a first support rod and a second support rod arranged to face each other; A first positioning groove and a second positioning groove, the first positioning groove and the second positioning groove being formed on a first surface of the sheet, the first positioning groove being configured to receive the first support rod, and the second positioning groove being configured to receive the second support rod; A locking device including a first blocking member, a second blocking member, and an elastic element, the first blocking member and the second blocking member being slidably engaged with the sheet respectively, and the elastic element being configured to drive the first blocking member and the second blocking member to a locked position; A sheet connection structure.

108. The second surface of the sheet is provided with a first slide groove and a second slide groove, the first slide groove intersects the first positioning groove, the second slide groove intersects the second positioning groove, and the second surface of the sheet and the first surface of the sheet face opposite to each other; The first blocking member is slidably disposed in the first slide groove, and the second blocking member is slidably disposed in the second slide groove; The sheet connection structure according to claim 107.

109. The sheet further has a third slide groove, the first slide groove and the second slide groove are communicated by the third slide groove; The locking device further includes a connection bracket, the connection bracket is disposed in the third slide groove, two ends of the connection bracket are respectively provided with a first surface and a second surface bent downward with respect to the connection bracket, the first blocking member is connected to the first surface, and the second blocking member is connected to the second surface; A fourth elongated hole is provided on the bottom wall of the third slide groove, a fastener is attached in the connection bracket, and a first end of the fastener is configured to pass through the fourth elongated hole and extend out therefrom; The sheet connection structure according to claim 108.

110. A fourth slide groove is further provided on the first surface of the sheet, the fourth slide groove and the third slide groove are adjacent in the extending direction of the fastener, and the fourth slide groove is located between the first slide groove and the second slide groove; The locking device is further provided with a third release member, the third release member is accommodated in the fourth slide groove, and the first end portion of the fastener is connected to the third release member. The elastic element is sandwiched between the side wall of the fourth slide groove and the third release member. The seat connection structure according to claim 109.

111. A first receiving groove is provided at the first end portion of the third release member, the first receiving groove is configured to receive the end portion of the elastic element, and a pressing recess is provided at the second end portion of the third release member. A shield plate is provided in a partial region of the fourth slide groove, and the shield plate shields the elastic element. The seat connection structure according to claim 110.

112. The locking device further includes a second connecting member, the second connecting member is operatively connected to the first blocking member and the second blocking member, and when one of the first blocking member and the second blocking member is pushed and one of the first support rod and the second support rod is released, under the action of the second connecting member, the other of the first blocking member and the second blocking member is pushed and the other of the first support rod and the second support rod is released. The seat connection structure according to claim 107.

113. There is a main groove on the second surface of the seat, the main groove intersects with the first positioning groove and the second positioning groove respectively, and the second surface of the seat and the first surface of the seat face opposite to each other. The first blocking member and the second blocking member are slidably arranged in the main groove. The seat connection structure according to claim 112.

114. The first end portions of the first blocking member and the second blocking member which are separated from each other are respectively configured to lock the first support rod and the second support rod. A first connection boss is arranged at the second end portion of the first blocking member, a second connection boss is arranged at the second end portion of the second blocking member, and the second end portion of the first blocking member and the second end portion of the second blocking member are close to each other. The second connecting member is a rod, the first end portion of the second connecting member is pivotally connected to the first connection boss, and the second end portion of the second connecting member is pivotally connected to the second connection boss. The seat connection structure according to claim 113.

115. The elastic element includes a first spring and a second spring. The first spring is disposed between an end of the first connection boss and the second blocking member, and the second spring is disposed between an end of the second connection boss and the first blocking member. The seat connection structure according to claim 114.

116. A first protruding post is provided at a first end of the second connecting member, and a second protruding post is provided at a second end of the second connecting member. The first connection boss includes a fifth elongated hole that slidably engages with the first protruding post, and the second connection boss includes a sixth elongated hole that slidably engages with the second protruding post. A first recess is formed in the first connection boss. The first end of the second connecting member is received in the first recess, and the first protruding post is configured to enter the fifth elongated hole through the first recess. A second recess is formed in the second connection boss. The second end of the second connecting member is received in the second recess, and the second protruding post is configured to enter the sixth elongated hole through the second recess. The seat connection structure according to claim 114 or claim 115.

117. A first wedge and a second wedge are provided on a side wall of the main groove. The first wedge is configured to abut against the first blocking member, and the second wedge is configured to abut against the second blocking member, and / or Pushing bevels are respectively provided at a first end of the first blocking member and a first end of the second blocking member that are separated from each other. The seat connection structure according to claim 113.

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