Rotary locking structure of seat and baby carriage

Abstract

The rotation locking structure of the seat comprises the seat, a first locking piece, a first transmission piece, an unlocking piece and a two-way lock, the first locking piece is installed on a backrest in a sliding mode to keep the angle between the backrest and a seat plate, the first transmission piece is installed on the seat plate in a sliding mode to keep the angle between the backrest and the seat plate, and the unlocking piece is installed on the seat plate in a sliding mode. The unlocking seat plate is provided with an initial position and an unlocking position after sliding, and the unlocking seat plate is driven under the unlocking position to allow the seat plate to turn over relative to the frame; the unlocking piece is movably mounted on the backrest and sequentially provided with an initial position, a first unlocking position and a second unlocking position along the movement trend of the unlocking piece, and the backrest is correspondingly locked on the seat plate at the initial position; at the first unlocking position, the first locking piece is linked to be unlocked, and the backrest is allowed to rotate relative to the seat plate; at the second unlocking position, the first transmission part is driven to the unlocking position through the first locking part; the second lock limits the unlocking piece from the first unlocking position to the second unlocking position, the structure of the seat is simplified, and operation safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of children's products, and in particular to a rotation locking structure of a seat and a baby carriage. Background Art

[0002] The current baby stroller includes a seat and a foldable frame, wherein the seat includes a seat plate and a backrest that rotate to match, the backrest has multiple use positions with different inclination angles relative to the seat plate, and an adjustment mechanism for adjusting the inclination angle of the backrest is arranged between the two. Among them, in some baby strollers, the folding operation is to rotate the backrest to make it close to the seat plate. During the rotation of the backrest, the first locking mechanism between the seat and the frame is unlocked, and the second locking mechanism of the frame itself is unlocked, and the baby stroller is finally folded. The unlocking member for unlocking the first locking mechanism and the unlocking member corresponding to the adjustment mechanism are independent of each other, and the corresponding components are also independent of each other, resulting in a relatively complex structure of the seat and a risk of misoperation. Summary of the invention

[0003] The present application provides a rotation locking structure for a seat, which simplifies the structure of the seat and improves operational safety.

[0004] The present application provides a rotation locking structure of a seat, comprising:

[0005] A seat, the seat comprising a seat plate and a backrest that are rotatably matched, wherein the seat plate is used to be mounted to the vehicle frame;

[0006] A first locking member is slidably mounted on the backrest to maintain the angle between the backrest and the seat plate;

[0007] A first transmission member is slidably mounted on the seat plate, and has an initial position and a release position after sliding, wherein the transmission releases the seat plate in the release position, allowing the seat plate to flip relative to the frame;

[0008] The unlocking member is movably mounted on the backrest and has a predetermined movement trend relative to the backrest. The unlocking member has the following positions in sequence along the movement trend:

[0009] In the initial position, the backrest is locked to the seat plate;

[0010] A first unlocked position, in which the first locking element is unlocked to allow the backrest to rotate relative to the seat plate;

[0011] The second unlocking position is when the first transmission member is driven to the unlocking position by the first locking member;

[0012] The second lock restricts the unlocking member from moving from the first unlocking position to the second unlocking position.

[0013] Several optional methods are also provided below, but they are not intended to be additional limitations on the above-mentioned overall solution, but are merely further supplements or preferences. Under the premise that there are no technical or logical contradictions, each optional method can be combined with the above-mentioned overall solution separately, and multiple optional methods can also be combined.

[0014] Optionally, the backrest has two movement directions relative to the seat plate: reclining and tilting forward. In the tilting direction, the backrest has the following movement directions:

[0015] There are multiple use positions, and the first locking member is locked with the seat plate in each use position;

[0016] At the critical position, the first locking member rotating with the backrest is blocked by the seat plate;

[0017] The folded position is further closer to the seat plate.

[0018] Optionally, the first locking element has, radially outwardly, the following parts in sequence:

[0019] In the first position, the unlocking member is in the initial position, the seat plate has a plurality of gear slots, and the first locking member is placed in the corresponding gear slots;

[0020] The second position, the unlocking member is in the first unlocking position, the first locking member moves out of the gear slot, and the backrest is allowed to switch to each of the use positions;

[0021] In the third position, the unlocking member is in the second unlocking position, the first locking member correspondingly drives the first transmission member to the unlocking position, and the first locking member avoids the obstruction of the seat plate to allow the backrest to move from the critical position to the folded position.

[0022] Optionally, the backrest further has in the forward tilting direction:

[0023] The first blocked position is between the use position and the critical position, and the first locking member is in the third position and blocked by the first transmission member.

[0024] Optionally, it also includes an armrest located in front of the backrest when in use, and the backrest also has:

[0025] The second obstructed position is between the use position and the critical position, and the backrest is directly or indirectly obstructed by the armrest to limit the backrest from tending to the critical position.

[0026] Optionally, the backrest and the seat plate rotate around a first axis, the first locking element slides radially along the first axis, and the first locking element includes:

[0027] A linkage part, drivingly connected to the unlocking member;

[0028] A clamping part, cooperating with the seat plate to keep the backrest at a corresponding angle;

[0029] The trigger part cooperates with the first transmission member, and the trigger part and the engaging part are arranged alternately in axial position.

[0030] Optionally, the first transmission member has an axially extending first protrusion, and when the backrest is in a critical position, the trigger portion enters the radial inner side of the first protrusion, and when the unlocking member tends to the second unlocking position, the first locking member tends to the third position and the trigger portion drives the first protrusion to make the first transmission member tend to the unlocking position.

[0031] Optionally, the seat plate has a blocking portion, and when the backrest is at a critical position, the blocked portion of the first locking member abuts against the blocking portion to limit the backrest from moving toward the folded position;

[0032] The blocking portion is provided with a first avoidance groove around the first axis. When the unlocking member is in the second unlocking position, that is, the first locking member is in the third position, the blocked portion of the first locking member is aligned with the first avoidance groove, allowing the backrest to move toward the folded position and the blocked portion to enter the first avoidance groove accordingly.

[0033] Optionally, a retaining structure that cooperates with each other and slides around a first axis is provided between the backrest and the first transmission member, and when the backrest tends to the folded position, the retaining structure restricts the first transmission member to a released position.

[0034] Optionally, the retaining structure includes a limiting groove and a limiting rib that cooperate with each other;

[0035] The first transmission member has a second protrusion extending axially and located radially outside the first protrusion, and a limiting groove is formed between the two protrusions in the radial direction;

[0036] The backrest is provided with a limiting rib around the first axis. When the backrest is in a folded position, the limiting rib slides into the limiting groove to maintain the radial position of the first transmission member.

[0037] Optionally, the backrest has a registration groove, and when the backrest is in a critical position, the first transmission member corresponds to the registration groove, allowing the first transmission member to move toward a release position.

[0038] Optionally, the second lock is interlocked with the unlocking member.

[0039] The present application also provides a baby carriage, comprising:

[0040] A foldable frame having a relatively folded state and an unfolded state;

[0041] The rotation locking structure of the seat described in any one of the present applications, wherein the seat plate is rotatably mounted on the frame;

[0042] The second locking member acts between the seat plate and the frame to keep the seat plate locked in rotation. The second locking member is unlocked by the first transmission member to allow the seat plate to flip relative to the frame.

[0043] Optionally, the frame is rotatably mounted with an adapter seat, the seat plate is fixed with an adapter detachably connected to the adapter seat, and the second locking member acts between the adapter seat and the frame;

[0044] The frame is provided with a locking mechanism for maintaining the unfolded state, and when the seat plate is flipped relative to the frame, the locking mechanism is unlocked to allow the frame to be folded.

[0045] Optionally, the rotation locking structure of the seat further includes:

[0046] The second transmission member is transmission-connected between the first transmission member and the second locking member, and moves along the first axis to trigger the unlocking of the second locking member. The first transmission member and the second transmission member switch the transmission direction through mutually matching inclined surfaces.

[0047] The seat rotation locking structure of the present application controls the backrest inclination angle by driving the first locking member through the unlocking member, and similarly controls the rotation and folding of the seat relative to the frame by driving the first transmission member through the first locking member, integrating the two functions of backrest adjustment and seat folding, reducing the number of parts and simplifying the seat structure. At the same time, a second lock is added to restrict the operation logic of the unlocking member, thereby improving the safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 This is a structural view of a baby stroller in an unfolded state according to an embodiment of the present application;

[0049] Figure 2 This is a structural view of a baby stroller in an embodiment of the present application when the backrest of the seat is in a critical position;

[0050] Figure 3 for Figure 1 A structural view of the baby carriage in a folded state;

[0051] Figure 4 for Figure 1 The front view of the mid-size stroller;

[0052] Figure 5 for Figure 4 Partial cross-sectional view along the AA direction;

[0053] Figure 6 A partial exploded view of a seat at a connection plate according to an embodiment of the present application;

[0054] Figure 7 for Figure 6 An exploded view from another perspective;

[0055] Figure 8 for Figure 6 A structural view of the first transmission member;

[0056] Figure 9a for Figure 5 A partial cross-sectional view in the CC direction (the first locking element is in the first position);

[0057] Figure 9b for Figure 9a A partial cross-sectional view of the first locking element when it is switched to the second position;

[0058] Fig.9c for Figure 9b A partial cross-sectional view of the middle backrest when it is rotated to the critical position;

[0059] Fig.10a for Figure 5 A partial cross-sectional view in the middle DD direction (the first locking element is in the first position);

[0060] Fig.10b for Fig.10a A partial cross-sectional view of the first locking element when it is switched to the second position;

[0061] Fig.10c for Fig.10b A partial cross-sectional view of the middle backrest when it is rotated to the critical position;

[0062] Fig.10d for Fig.10c A partial cross-sectional view of the first locking element when it is switched to the third position;

[0063] Fig.11a for Figure 5 A partial cross-sectional view in the EE direction (the first locking element is in the first position);

[0064] Fig.11b for Fig.11a A partial cross-sectional view of the first locking element when it is switched to the second position;

[0065] Fig.11c for Fig.11b A partial cross-sectional view of the middle backrest when it is rotated to the critical position;

[0066] Fig.11d for Fig.11c A partial cross-sectional view of the first locking element when it is switched to the third position;

[0067] Fig.12a for Figure 5 Partial cross-sectional view along the BB direction;

[0068] Figure 12b for Fig.12aPartial cross-sectional view of the middle backrest when it is switched to the critical position;

[0069] Fig.13a and Fig.13b They are respectively a partial view and a partial cross-sectional view of the unlocking member in the initial position;

[0070] Fig.13c and Fig.13d They are respectively a partial view and a partial cross-sectional view of the unlocking member when it is in the first unlocking position;

[0071] Fig.13e and Fig.13f They are respectively a partial view and a partial cross-sectional view of the unlocking member when it is in the second unlocking position;

[0072] Fig.14 An exploded view of the frame and seat in this application;

[0073] Fig.15 An exploded view of the frame, the adapter and the second locking member in this application;

[0074] Fig.16 for Fig.15 An exploded view from another perspective;

[0075] Fig.17 This is a structural view of the locking structure in this application.

[0076] The reference numerals in the figures are described as follows:

[0077] 1000, baby carriage; 100, frame; 110, front foot rod; 120, rear foot rod; 130, handlebar; 140, adapter; 141, driving unit; 142, third transmission member; 150, second locking member; 160, first connecting rod; 171, first locking member; 172, second locking member; 181, first elastic member; 182, second elastic member;

[0078] 200, seat; 201, first axis; 210, seat plate; 211, gear slot; 212, first avoidance slot; 213, blocking portion; 214, adapter; 215, connecting plate; 216, guide slot; 217, second avoidance slot; 218, locking block;

[0079] 220, backrest; 221, registration groove; 222, connecting ring; 223, guide slope; 224, limiting rib; 225, armrest; 226, locking groove;

[0080] 230, first locking member; 231, linkage portion; 232, engaging portion; 233, triggering portion; 234, obstructed portion;

[0081] 240, first transmission member; 241, first protrusion; 242, second protrusion; 243, limiting groove;

[0082] 250, unlocking member; 251, protrusion; 256, limiting member; 257, stopper;

[0083] 260. Second transmission member. DETAILED DESCRIPTION

[0084] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0085] It should be noted that when a component is referred to as being "connected" to another component, it may be directly connected to the other component or there may be a central component. When a component is referred to as being "disposed on" another component, it may be directly disposed on the other component or there may be a central component at the same time.

[0086] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0087] In this application, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0088] See also Figure 1 to Figure 11dThe present application provides a rotation locking structure of a seat, including a seat 200, the seat 200 is used to carry a child, the seat 200 includes a seat plate 210 and a backrest 220 that are rotatably matched, and the seat 200 of the present application is installed on the frame 100 through the seat plate 210 to form a baby carriage 1000 for use. The following embodiments and drawings are described using a baby carriage as an example. The seat plate 210 can bear weight in a sitting position (corresponding to the following use posture), and the backrest 220 supports the back of the child in the use posture. The shape and material of the seat plate 210 and the backrest 220 themselves are not strictly limited, for example, they can be solid plates or frame structures or flexible structures, and can also be covered with a buffer layer or supplemented with a reinforcement structure as needed.

[0089] For the convenience of description and understanding, the frame 100 of the present application adopts a foldable structure and has an unfolded state and a folded state. The seat 200 has a use posture and a flipped posture relative to the frame 100. The seat 200 is for infants and children to sit in the use posture, and the flipped posture is other postures relative to the use posture. When the entire vehicle is folded and stored, the seat 200 can enter the flipped posture after the mutual limitation with the frame 100 is released. When it is flipped to the extreme position (or the entire vehicle is completed folded and stored), it is in the folded posture. In the folded posture, the backrest 220 is close to the seat board 210.

[0090] The rotation locking structure of the seat of this embodiment further includes a first locking member 230, a first transmission member 240 and an unlocking member 250. The first locking member 230 is slidably mounted on the backrest 220 and can be used to maintain the angle between the backrest 220 and the seat 210, at which the seat 200 can carry a child. The first transmission member 240 is slidably mounted on the seat 210 and has an initial position and a release position after sliding. In the release position, the first transmission member 240 drives and releases the seat 210, allowing the seat 210 (i.e., the entire seat 200) to flip relative to the frame 100 until the seat 200 is in a folded position. For example, a locking structure is provided between the seat 210 and the frame 100, and the first transmission member 240 can directly or indirectly unlock the locking mechanism.

[0091] The unlocking member 250 is movably mounted on the backrest 220 and has a predetermined movement trend relative to the backrest 220, which can be sliding, rotating, etc. The unlocking member 250 has an initial position, a first unlocking position, and a second unlocking position along its own movement trend. When the unlocking member 250 is in the initial position, the backrest 220 is correspondingly locked to the seat 210; when the unlocking member 250 switches from the initial position to the first unlocking position, the first locking member 230 is linked to slide to unlock, allowing the backrest 220 to rotate relative to the seat 210 to adjust the inclination of the backrest 220 or prepare to fold the seat 200; when the unlocking member 250 switches from the first unlocking position to the second unlocking position, the first transmission member 240 is driven to the unlocking position via the first locking member 230 to fold the seat 200.

[0092] The rotation locking structure of the seat also includes a second lock, which is used to limit the unlocking member 250 from the first unlocking position to the second unlocking position: when the second lock is in the locked state, the unlocking member 250 cannot be switched to the second unlocking position; when the second lock is in the unlocked state, the unlocking member 250 is allowed to switch to the second unlocking position.

[0093] The seat rotation locking structure of the present application controls the backrest inclination angle by driving the first locking member through the unlocking member, and similarly controls the rotation and folding of the seat relative to the frame by driving the first transmission member through the first locking member, integrating the two functions, reducing the number of components, and simplifying the seat structure. At the same time, a second lock is added to restrict the operation logic of the unlocking member, thereby improving the safety of use.

[0094] In one embodiment, the backrest 220 and the seat 210 rotate around the first axis 201, the first lock 230 slides radially along the first axis 201, and the first lock 230 includes a linkage portion 231, a locking portion 232 and a trigger portion 233. The linkage portion 231 is transmission-connected to the unlocking member 250, and the transmission method is, for example, connected by a steel wire to achieve remote transmission. The unlocking member 250 is arranged near the top of the backrest 220 for easy operation.

[0095] The engaging portion 232 cooperates with the seat plate 210 to keep the backrest 220 at a corresponding angle to adapt to different sitting postures of children. The triggering portion 233 cooperates with the first transmission member 240. The triggering portion 233 and the engaging portion 232 are staggered along the axial direction of the first axis 201, and cooperate with the counterparts at different positions, thereby improving the utilization of space and reducing the joint volume of the seat plate 210 and the backrest 220 at the rotational cooperation.

[0096] The backrest 220 has two movement directions, rearward and forward, relative to the seat 210. The backrest 220 has a use position, a critical position, and a folded position in the forward direction. There are multiple use positions. In each use position, the first locking member 230 of the backrest 220 is locked with the seat 210. When the backrest 220 is in the critical position, the first locking member 230 that rotates with the backrest 220 is blocked by the seat 210. When the backrest 220 is in the folded position, it is closer to the seat 210.

[0097] Correspondingly, the first locking member 230 has a first position, a second position and a third position in sequence radially outward, such as Figure 9a When the first locking member 230 is in the first position, the unlocking member 250 is in the initial position, the seat plate 210 has a plurality of gear slots 211, and the engaging portion 232 of the first locking member 230 is placed in the corresponding gear slot 211. Figure 9b, operate the unlocking member 250 to the first unlocking position, corresponding to the first locking member 230 switching to the second position, the engaging portion 232 moves out of the gear slot 211, at this time, the backrest 220 is allowed to switch between various use positions, or as Fig.9c As shown, the backrest 220 moves forward to the critical position.

[0098] When the backrest 220 moves to the critical position and the seat 200 needs to be folded, as shown in FIG. Figure 10a to Figure 10d ,and Figure 11a to Figure 11d , operate the unlocking member 250 to the second unlocking position, so that the first locking member 230 switches to the third position, and at the same time, the first locking member 230 correspondingly drives the first transmission member 240 to the unlocking position, and the first locking member 230 avoids the obstruction of the seat plate 210, allowing the backrest 220 to move from the critical position to the folding position, thereby completing the folding of the backrest 220 and the folding of the seat 200 under the action of gravity.

[0099] In combination with the purpose of the aforementioned two-way lock, if the two-way lock is unlocked in advance, so that when operating the unlocking member 250, the first unlocking position step is skipped, that is, the initial position is directly switched to the second unlocking position. Correspondingly, there is a possibility that the seat 200 is accidentally folded due to a user's misoperation, posing a safety hazard.

[0100] In one embodiment, the backrest 220 also has a first blocked position and a second blocked position in the forward tilting direction. For the first blocked position: if the two-way lock is unlocked in advance, the unlocking member 250 is operated to the second unlocking position, and the corresponding first locking member 230 is switched to the third position in advance. When the backrest 220 is switched from the use position to the critical position, the first locking member 230 is blocked by the first transmission member 240, so that the backrest 220 cannot be switched to the critical position, and the first transmission member 240 cannot be switched to the unlocking position. That is, this embodiment has strict restrictions on the operation logic of the unlocking member 250 and the two-way lock for the folding of the seat 200:

[0101] S100, the second lock is in a locked state, and the unlocking member 250 is operated to switch to a first unlocking position;

[0102] S200, rotating the backrest 220 from the use position to the critical position;

[0103] S300, unlocking the second lock, and then operating the unlocking member 250 to switch to the second unlocking position, and the first locking member 230 drives the first transmission member 240 to switch to the unlocking position;

[0104] S400, continue to rotate the backrest 220 to the folded position, and realize the folding of the seat 200 under the action of gravity.

[0105] Once the second lock is unlocked in advance, the backrest 220 will eventually be in the first blocked position when the backrest 220 rotates forward, and the seat 200 cannot be folded accordingly, reducing safety hazards. Figure 13a to Figure 13f The unlocking member 250 is rotatably mounted on the backrest 220, and the two-way lock includes a limiting member 256 slidably mounted on the backrest 220. The limiting member 256 has a limiting position (i.e., the two-way lock is locked) and a releasing position (i.e., the two-way lock is unlocked). In the limiting position, the unlocking member 250 is blocked by the limiting member 256 when in the first unlocking position. The limiting member 256 slides and switches to the releasing position, allowing the unlocking member 250 to switch to the second unlocking position. Specifically, the limiting member 256 has a stopper 257. The outer peripheral surface of the unlocking member 250 around its own rotation axis is radially protruded with a protrusion 251 that abuts against the stopper 257. When the limiting member 256 switches to the releasing position, the stopper 257 follows and exits the motion path of the protrusion 251. Further preferably, the second lock and the unlocking member 250 are interlocked, which can limit the premature unlocking of the second lock. For example, when the unlocking member 250 is between the initial position and the first unlocking position (including the initial position), the second lock is restricted by the unlocking member 250 and cannot be unlocked. Accordingly, the unlocking condition of the second lock is that the unlocking member 250 switches to the first unlocking position. For example, the unlocking member 250 has a limiting portion, and when the unlocking member 250 is between the initial position and the first unlocking position (including the initial position), the limiting portion is on the sliding path of the limiting member 256, thereby preventing the limiting member 256 from sliding and switching to the release position.

[0106] The rotation locking structure of the seat also includes an armrest 225 located in front of the backrest when in use. For the second blocked position: the backrest 220 is between the use position and the critical position, and the backrest 220 is directly or indirectly blocked by the armrest 225 to limit the backrest 220 from moving toward the critical position. The "direct" method is such as the backrest 220 and the armrest 225 directly abutting against each other to prevent the backrest 220 from switching to the critical position. When actually folding, the armrest 225 needs to be unlocked first to rotate it close to the seat plate 210 to release the restriction on the backrest 220.

[0107] In an "indirect" way, for example, when a child is sitting in the seat 200, the backrest 220 and the armrest 225 are located in front and behind the child respectively, and the backrest 220 rotates forward to lean against the child. The child is restrained by the armrest 225, thereby preventing the backrest 220 from further rotating, making it impossible for the backrest 220 to switch to the critical position, thereby making it impossible to fold the seat 200.

[0108] Combined with Figure 11a~ Fig.11d, the first transmission member 240 has an axially extending first protrusion 241. When the backrest 220 is at the critical position, the triggering portion 233 enters the radial inner side of the first protrusion 241. When the unlocking member 250 moves toward the second unlocking position, the first locking member 230 moves toward the third position and the triggering portion 233 drives the first protrusion 241 to move the first transmission member 240 toward the unlocking position. Combined with the above, if the two-way lock is unlocked in advance, the first locking member 230 switches to the third position in advance, and the backrest 220 rotates forward until the first transmission member 240 and the first locking member 230 abut against each other in the circumferential direction. Accordingly, the triggering portion 233 cannot enter the radial inner side of the first protrusion 241.

[0109] Among them Fig.11c The backrest 220 has a registration groove 221. When the backrest 220 is switched to the critical position, the first transmission member 240 corresponds to the registration groove 221, allowing the first transmission member 240 to move toward the unlocking position and enter the registration groove 221. If the backrest 220 does not reach the critical position, for example, when it is in the aforementioned first blocked position or second blocked position, the first transmission member 240 does not correspond to the registration groove 221, and the corresponding first transmission member 240 cannot be switched to the unlocking position. That is, the first transmission member 240 needs to meet the two conditions that the triggering part 233 is located on the radial inner side of its first protrusion 241 (correct unlocking part operation sequence), and the first transmission member 240 corresponds to the registration groove 221 (the backrest 220 is in the critical position) to realize the folding of the seat 200.

[0110] like Fig.10c and Fig.10d The seat plate 210 has a blocking portion 213. When the backrest 220 is in the critical position, the blocked portion 234 of the first locking member 230 abuts against the blocking portion 213 to limit the backrest 220 from moving toward the folded position. At this time, the backrest 220 is close to the front side relative to the vertical line, and the backrest 220 can be kept in the critical position under the action of gravity, which is convenient for subsequent operations. The blocking portion 213 is provided with a first avoidance groove 212 around the first axis 201. When the unlocking member 250 is in the second unlocking position, that is, when the first locking member 230 is in the third position, the blocked portion 234 of the first locking member 230 is aligned with the first avoidance groove 212, allowing the backrest 220 to move toward the folded position and the blocked portion 234 to enter the first avoidance groove 212 accordingly.

[0111] A retaining structure that cooperates with each other and slides around the first axis 201 is provided between the backrest 220 and the first transmission member 240. When the backrest 220 moves toward the folded position, the retaining structure restricts the first transmission member 240 to the unlocked position. Fig.11dIn the embodiment, the retaining structure includes a limiting groove 243 and a limiting rib 224 that cooperate with each other. The first transmission member 240 has an axially extending second protrusion 242, which is located radially outside the first protrusion 241, and the radial space between the two protrusions forms a limiting groove 243; the backrest 220 has a limiting rib 224 around the first axis 201. When the backrest 220 is in a folding position, the limiting rib 224 slides into the limiting groove 243 to maintain the radial position of the first transmission member 240, so as to prevent the first transmission member 240 from resetting and causing the seat 200 to fail to fold. In the figure, the registration groove 221 extends circumferentially around the first axis 201 and the radial inner side of the registration groove 221 is open, and the limiting rib 224 is arranged in the registration groove 221.

[0112] See again Figure 6 and Figure 7 The seat plate 210 is provided with a connecting plate 215, which is provided with a radially extending guide groove 216, and the first transmission member 240 is slidably mounted on the guide groove 216. The outer periphery of the connecting plate 215 is provided with a second avoidance groove 217 connected to the guide groove 216 and the aforementioned plurality of gear slots 211, wherein the second avoidance groove 217 is axially staggered with the gear slot 211, and the blocking portion 213 is located on the groove wall of one side of the circumferential direction of the guide groove 216. The backrest 220 is provided with a connecting ring 222, which is rotatably sleeved on the outer periphery of the connecting plate 215, and the engaging portion 232 of the first locking member 230 is axially staggered with the triggering portion 233 and extends into the connecting ring 222, wherein the engaging portion 232 cooperates with the gear slot 211, and the triggering portion 233 extends into the second avoidance groove 217 and cooperates with the first transmission member 240 when the backrest 220 rotates to a corresponding position. The guide groove 216 and the second avoidance groove 217 are connected.

[0113] See also Figure 6 , Fig.12a and Figure 12b In one embodiment, the armrest 225 is rotatably mounted on the seat 200 and releasably locked to the seat 200 to maintain the use angle. When the backrest 220 tends to the folded position, the armrest 225 is unlocked, allowing the armrest 225 to rotate and approach the seat 210. Specifically, the armrest 225 and the connecting ring 222 of the backrest 220 are rotatably matched, the armrest 225 is provided with a locking groove 226, and the seat 210 is provided with a locking block 218 along the radial sliding direction. The locking block 218 has a locking state of extending into the locking groove 226, and the connecting ring 222 has a guiding inclined surface 223 that acts on the locking block 218 to make it exit the locking groove 226 when the backrest 220 tends from the critical position to the folded position.

[0114] See also Figure 1 to Figure 3 , Figure 14 to Figure 17The present application also provides a baby carriage 1000, which includes a foldable frame 100, a rotation locking mechanism of any seat of the present embodiment, and a second locking member 150. The frame 100 has a relatively folded state and an unfolded state, the seat plate 210 is rotatably mounted on the frame 100, the second locking member 150 acts between the seat plate 210 and the frame 100 to keep the seat plate 210 rotationally locked, and the second locking member 150 is unlocked by the first transmission member 240 to allow the seat plate 210 to flip relative to the frame 100.

[0115] The seat plate 210 is fixedly mounted with an adapter 214, and the frame 100 is mounted with an adapter seat 140 that is detachably matched with the adapter 214. The method for realizing the rotation of the seat 200 relative to the frame 100 includes at least one of the following:

[0116] a. The seat plate 210 and the adapter 214 are rotatably matched;

[0117] b. The adapter 214 and the adapter seat 140 are rotatably matched;

[0118] c. The adapter seat 140 rotates relative to the frame 100. The drawings of the present application provide scheme c, in which the corresponding second locking member 150 acts between the adapter seat 140 and the frame 100. The frame 100 has a locking mechanism for maintaining the unfolded state. When the seat plate 210 is flipped relative to the frame 100, the locking mechanism is unlocked to allow the frame 100 to be folded.

[0119] There is direct transmission or indirect transmission between the first transmission member 240 and the second locking member 150. In one embodiment, the rotation locking structure of the seat also includes a second transmission member 260, which is transmission-connected between the first transmission member 240 and the second locking member 150, and moves along the first axis 201 to trigger the unlocking of the second locking member 150. The first transmission member 240 and the second transmission member 260 switch the transmission direction through mutually matching inclined surfaces.

[0120] In the figure, the second locking member 150 is a disc-shaped structure with a plurality of teeth, and is slidably installed between the adapter seat 140 and the frame 100 along the first axis 201. The first transmission member 240 switches to the unlocking position, drives the second transmission member 260 to slide through the inclined surface and finally acts on the second locking member 150 to exit the adapter seat 140, and the seat 200 drives the adapter seat 140 to rotate under the action of gravity. Among them, the third transmission member 142 is slidably installed on the adapter seat 140 along the axial direction of the first axis 201, and the second transmission member 260 slides along the axial direction to push the third transmission member 142 to slide, and the third transmission member 142 pushes the second locking member 150 to exit the adapter seat 140.

[0121] The present application provides an embodiment of a frame, wherein the frame 100 includes two oppositely arranged side frames, the side frames including a front foot rod 110, a rear foot rod 120 and a handlebar 130, two of which are hinged to each other, and the other is hinged to at least one of the first two. In the figure, the bottom of the handlebar 130 is hinged to the top of the rear foot rod 120, the top of the front foot rod 110 is hinged to the rear foot rod 120, and a first connecting rod 160 is provided between the handlebar 130 and the front foot rod 110. When the locking mechanism is unlocked, the handlebar 130 rotates close to the rear foot rod 120, and the front foot rod 110 is driven to rotate close to the rear foot rod 120 through the first connecting rod 160.

[0122] The locking mechanism includes:

[0123] A first locking member 171 is slidably mounted on the rear foot rod 120 and has a locking state acting on the handlebar rod 130;

[0124] A second locking member 172 is slidably mounted on the rear foot rod 120 and has a locking state acting on the front foot rod 110, wherein the second locking member 172 is linked with the first locking member 171 via an inclined surface;

[0125] A first elastic member 181 acts on the first locking member 171 to reset and keep it in a locked state;

[0126] The second elastic member 182 acts on the second locking member 172 to reset and keep it in the locked state.

[0127] The adapter seat 140 is provided with a driving part 141 which acts on the first locking member 171 to switch to the unlocked state during the rotation process, and the first locking member 171 drives the second locking member 172 to switch to the unlocked state through the inclined surface.

[0128] The following is an explanation of the folding operation of the stroller:

[0129] Operate the unlocking member 250 to the first unlocking position, the first locking member 230 switches to the second position, and the backrest 220 rotates forward to the critical position; then unlock the second lock and operate the unlocking member 250 to the second unlocking position, the first locking member 230 switches to the third position, and at the same time drives the first transmission member 240 to the unlocking position, drives the second transmission member 260 to slide through the inclined surface and acts on the second locking member 150 to release the lock; then continue to rotate the backrest 220 to the folded position, wait for the backrest 220 to rotate a certain angle (that is, the first locking member 230 enters the first avoidance groove 212), release the backrest 220, and then the backrest 220 continues to rotate due to gravity, and at the same time the entire seat 200 also rotates relative to the frame 100, and the adapter seat 140 moves accordingly to unlock the locking structure, and finally the frame 100 is folded.

[0130] The seat rotation locking structure of the present application controls the backrest inclination angle by driving the first locking member through the unlocking member, and similarly controls the rotation and folding of the seat relative to the frame by driving the first transmission member through the first locking member, integrating the two functions, reducing the number of components, and simplifying the seat structure. At the same time, a second lock is added to restrict the operation logic of the unlocking member, thereby improving the safety of use.

[0131] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. When the technical features in different embodiments are embodied in the same figure, it can be regarded that the figure also discloses the combination examples of the various embodiments involved.

[0132] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. The rotation locking structure of the seat is characterized by: include: A seat, comprising a seat plate and a backrest that are rotatably matched, wherein the seat plate is used to be mounted to a vehicle frame; A first locking member is slidably mounted on the backrest to maintain an angle between the backrest and the seat plate; A first transmission member is slidably mounted on the seat plate, and has an initial position and a release position after sliding, wherein the seat plate is released by the transmission at the release position to allow the seat plate to flip relative to the frame; The unlocking member is movably mounted on the backrest and has a predetermined movement trend relative to the backrest, and the unlocking member has the following positions in sequence along the movement trend: In the initial position, the backrest is correspondingly locked to the seat plate; A first unlocking position, in which the first locking element is unlocked to allow the backrest to rotate relative to the seat plate; A second unlocking position, wherein the first transmission member is driven to a releasing position by the first locking member; The second lock restricts the unlocking member from moving from the first unlocking position to the second unlocking position.

2. The rotation locking structure of the seat according to claim 1, characterized in that: The backrest has two movement directions relative to the seat plate: reclining and tilting forward. The backrest has the following movement directions in the tilting direction: There are multiple use positions, and when the backrest is in each use position, the first locking member is locked with the seat plate; At the critical position, the first locking member rotating with the backrest is blocked by the seat plate; The folded position is further closer to the seat plate.

3. The rotation locking structure of the seat according to claim 2, characterized in that: The first locking element has the following components in order from radially outward direction: In the first position, the unlocking member is in the initial position, the seat plate has a plurality of gear slots, and the first locking member is placed in the corresponding gear slots; In the second position, the unlocking member is in the first unlocking position, and the first locking member moves out of the gear slot, allowing the backrest to be switched to each of the use positions; In the third position, the unlocking member is in the second unlocking position, the first locking member correspondingly drives the first transmission member to the unlocking position, and the first locking member avoids the obstruction of the seat plate to allow the backrest to move from the critical position to the folded position.

4. The rotation locking structure of the seat according to claim 3, characterized in that: The backrest also has in the forward tilting direction: The first blocked position is between the use position and the critical position, and the first locking member is in the third position and blocked by the first transmission member.

5. The rotation locking structure of the seat according to claim 3, characterized in that: It also includes an armrest located in front of the backrest when in use, and the backrest also has: The second obstructed position is between the use position and the critical position, and the backrest is directly or indirectly obstructed by the armrest to limit the backrest from tending to the critical position.

6. The rotation locking structure of the seat according to claim 3, characterized in that: The backrest and the seat plate rotate around a first axis, the first locking element slides radially along the first axis, and the first locking element includes: A linkage part, drivingly connected to the unlocking member; A clamping part, cooperating with the seat plate to keep the backrest at a corresponding angle; The trigger part cooperates with the first transmission member, and the trigger part and the engaging part are arranged alternately in axial position.

7. The rotation locking structure of the seat according to claim 6, characterized in that: The first transmission member has an axially extending first protrusion. When the backrest is in a critical position, the trigger portion enters the radial inner side of the first protrusion. When the unlocking member moves toward the second unlocking position, the first locking member moves toward the third position, and the trigger portion drives the first protrusion to make the first transmission member move toward the unlocking position.

8. The rotation locking structure of the seat according to claim 7, characterized in that: The seat plate is provided with a blocking portion, and when the backrest is at a critical position, the blocked portion of the first locking member abuts against the blocking portion to limit the backrest from moving toward the folded position; The blocking portion is provided with a first avoidance groove around the first axis. When the unlocking member is in the second unlocking position, that is, the first locking member is in the third position, the blocked portion of the first locking member is aligned with the first avoidance groove, allowing the backrest to move toward the folded position and the blocked portion to enter the first avoidance groove accordingly.

9. The rotation locking structure of the seat according to claim 8, characterized in that: A retaining structure that cooperates with each other and slides around the first axis is provided between the backrest and the first transmission member. When the backrest tends to the folded position, the retaining structure restricts the first transmission member to the unlocking position.

10. The rotation locking structure of a seat according to claim 9, characterized in that: The retaining structure includes a limiting groove and a limiting rib that cooperate with each other; The first transmission member has a second protrusion extending axially and located radially outside the first protrusion, and a limiting groove is formed between the two protrusions in the radial direction; The backrest is provided with a limiting rib around the first axis. When the backrest is in a folded position, the limiting rib slides into the limiting groove to maintain the radial position of the first transmission member.

11. The rotation locking structure of a seat according to claim 3, characterized in that: The backrest is provided with a registration groove. When the backrest is in a critical position, the first transmission member corresponds to the registration groove, allowing the first transmission member to move toward a release position.

12. The rotation locking structure of a seat according to claim 1, characterized in that: The second lock is interlocked with the unlocking member.

13. A baby carriage, characterized in that: include: A foldable frame having a relatively folded state and an unfolded state; The rotation locking structure of a seat according to any one of claims 1 to 12, wherein the seat plate is rotatably mounted on the frame; The second locking member acts between the seat plate and the frame to keep the seat plate locked in rotation. The second locking member is unlocked by the first transmission member to allow the seat plate to flip relative to the frame.

14. The baby carriage according to claim 13, characterized in that: The frame is rotatably mounted with an adapter seat, the seat plate is fixed with an adapter detachably connected to the adapter seat, and the second locking member acts between the adapter seat and the frame; The frame is provided with a locking mechanism for maintaining the unfolded state, and when the seat plate is flipped relative to the frame, the locking mechanism is unlocked to allow the frame to be folded.

15. The baby carriage according to claim 14, characterized in that: The rotation locking structure of the seat also includes: The second transmission member is transmission-connected between the first transmission member and the second locking member, and moves along the first axis to trigger the unlocking of the second locking member. The first transmission member and the second transmission member switch the transmission direction through mutually matching inclined surfaces.

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