Connecting structure, child carrying device, frame, and child carrier

Abstract

To provide a connecting structure, a child carrying device, a frame, and a child carrier that meet the needs of modern families and enhance the user's experience.SOLUTION: A connecting structure is provided, including: a first joint component and a second joint component pivotable relative to each other around the axial direction; and a connecting member extending through the second joint component in the axial direction and inserted into the first joint component and screwedly connected to the first joint component to restrict separation of the first joint component from the second joint component in a direction parallel to the axial direction. The connecting member is spaced apart from the second joint component.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present application relates to a connecting structure, a child carrying device, a frame and a child carrier. [Background technology]

[0002] Due to their convenience in storage and foldable strollers have gained popularity among a wide range of consumers in the market, but current strollers still have room for improvement to meet the needs of modern families and improve user experience. Summary of the Invention

[0003] In a first aspect, the present application provides a connection structure, the connection structure including: a first joint and a second joint arranged to rotate relative to each other about an axial direction; and a connection member inserted into the first joint through the second joint along the axial direction and torsionally connected to the first joint, thereby restricting separation of the first joint and the second joint along a direction parallel to the axial direction, the connection member being arranged at a distance from the second joint.

[0004] In one embodiment, the first joint is located between the connecting member and the second joint along a radial direction perpendicular to the axial direction, thereby separating the connecting member and the second joint along the radial direction.

[0005] In one embodiment, the first joint includes a shaft portion that passes through the second joint along a direction parallel to the axial direction, and the shaft portion is located between the connecting member and the second joint in the radial direction.

[0006] In one embodiment, the connecting member has a head portion and a rod portion extending from the head portion along the axial direction, the rod portion is inserted into the shank portion along the axial direction and is threadedly connected to the shank portion, the head portion is located outside the shank portion in the axial direction, and the second joint is located between the head portion and the first joint in a direction parallel to the axial direction.

[0007] In one embodiment, the connection structure further includes a spacer member, the connection member having a head portion and a rod portion extending from the head portion along the axial direction, the rod portion being inserted into the shaft portion along the axial direction and threadably connected to the shaft portion, the head portion being positioned outside the shaft portion in the axial direction, the spacer member being positioned between the head portion and the second joint in a direction parallel to the axial direction, thereby separating the connection member and the second joint along a direction parallel to the axial direction, and the spacer member not rotating around the axial direction relative to the connection member.

[0008] In one embodiment, the spacer member is fitted on the outside of the shaft portion along a direction parallel to the axial direction, and the spacer member does not rotate around the axial direction relative to the shaft portion.

[0009] In one embodiment, the inner circumferential surface of the spacer member and the outer surface of the shaft portion are arranged adjacent to each other along the radial direction, and a cross section of the inner circumferential surface of the spacer member cut perpendicular to the axial direction and a cross section of the outer surface of the shaft portion cut perpendicular to the axial direction have corresponding shapes, and both are arranged to be non-circular.

[0010] In one embodiment, the head portion, the spacer member, the second joint, and the first joint are in contact with each other in a direction parallel to the axial direction.

[0011] In one embodiment, the second joint has a second recess formed in a direction parallel to the axial direction away from the head portion, the spacer member is accommodated in the second recess in a direction parallel to the axial direction, the second recess includes a second bottom surface, and the spacer member is located between the head portion and the second bottom surface in a direction parallel to the axial direction.

[0012] In one embodiment, the second recess includes an inner surface, and the outer peripheral surface of the spacer member and the inner surface are adjacent to each other along the radial direction and spaced apart from each other.

[0013] In one embodiment, the spacer member is located between the head portion and the shaft portion along a direction parallel to the axial direction, and abuts against the head portion and the shaft portion, respectively.

[0014] In one embodiment, a first recess is recessed into the end of the shaft portion closer to the head portion, away from the head portion, along a direction parallel to the axial direction, the spacer member is accommodated in the first recess along a direction parallel to the axial direction, the first recess includes a first bottom surface, and the spacer member is positioned between the head portion and the first bottom surface in a direction parallel to the axial direction.

[0015] In one embodiment, the first recess includes an outer surface, and the inner circumferential surface and the outer surface of the spacer member are adjacent along the radial direction, and the inner circumferential surface and the outer surface of the spacer member have corresponding shapes in a cross section cut perpendicular to the axial direction, and both are non-circular.

[0016] In one embodiment, the connection structure further includes a spacer member, which is positioned between the connection member and the second joint in a direction parallel to the axial direction, thereby separating the connection member and the second joint along a direction parallel to the axial direction, and which does not rotate around the axial direction relative to the connection member.

[0017] In one embodiment, the spacer member is fitted to the outside of the first joint along a direction parallel to the axial direction, and the spacer member does not rotate around the axial direction relative to the first joint.

[0018] In one embodiment, the inner circumferential surface of the spacer member and the outer surface of the first joint are arranged adjacent to each other in the radial direction, and a cross section of the inner circumferential surface of the spacer member taken perpendicular to the axial direction and a cross section of the outer surface of the first joint taken perpendicular to the axial direction have corresponding shapes, and both are arranged to be non-circular.

[0019] In one embodiment, the spacer member abuts against the connecting member and the second joint along a direction parallel to the axial direction, and the second joint is located between the connecting member and the first joint and abuts against the first joint in a direction parallel to the axial direction.

[0020] In one embodiment, the spacer member is located between the connecting member and the first joint in a direction parallel to the axial direction, and abuts against the connecting member and the first joint, respectively.

[0021] In one embodiment, the connection structure further includes a locking member, a resetting member, and an unlocking member. The locking member is disposed between the first joint and the second joint in a direction parallel to the axial direction and is movable along the axial direction between a locked position that prevents the first joint and the second joint from rotating relative to each other and an unlocked position that allows the first joint and the second joint to rotate relative to each other. The resetting member is disposed between the locking member and the first joint and biases the locking member toward the locked position. The unlocking member is movably connected to the second joint and is disposed so that it can be operated from outside the connection structure to move the locking member from the locked position to the unlocked position. The locking member is disposed between the resetting member and the unlocking member in a direction parallel to the axial direction.

[0022] In one embodiment, the connecting member is exposed outside the first joint and the second joint along the axial direction, and the connecting member is located between the unlocking member and the first joint and between the unlocking member and the second joint in a direction parallel to the axial direction.

[0023] In one embodiment, the connection structure further includes a reinforcing member disposed within the first joint.

[0024] The present application further provides a child carrier, which includes a running mechanism, a lower handle extending upward from the running mechanism, an upper handle extending upward from the lower handle, and a connection structure based on the first aspect of the present application, wherein the first joint is fixedly connected to the lower handle and the second joint is fixedly connected to the upper handle.

[0025] In a second aspect, the present application provides a child carrier. The child carrier includes a folding joint and an operating assembly. The folding joint includes a mounting base, a first pivot base, and a second pivot base, the mounting base, the first pivot base, and the second pivot base being pivotally connected by a first pivot shaft, the mounting base being used for mounting on a connecting joint of a child carrier, and the first pivot base being disposed between the mounting base and the second pivot base. The operating assembly includes an operating member and a folding unlocking member, the folding unlocking member being pivotally connected to the folding joint by the first pivot shaft and operably connected to the folding joint, and the operating member being a rigid structure and pivotally connected to the folding unlocking member by the second pivot shaft.

[0026] The second pivot axis is offset from the first pivot axis, and the operating member is adapted to move and rotate the folding unlocking member and drive the folding joint to switch from a locked state to an unlocked state, thereby allowing the first pivot base to rotate relative to the mounting base.

[0027] In one embodiment, the operating member is provided with an operating portion suitable for operation, the folding unlocking member has a first position, and when the folding unlocking member is in the first position, the folding joint is in a locked state, and the operating portion of the operating member is located above a horizontal plane including the first pivot axis and / or above a horizontal plane including the second pivot axis.

[0028] In one embodiment, the fold unlocking member has a first position, and when the fold unlocking member is in the first position, the fold joint is in a locked state, and a first included angle formed between a plane jointly defined by the first pivot axis and the second pivot axis and the vertical direction is an acute angle.

[0029] In one embodiment, the fold unlocking member has a second position, and when the fold unlocking member is in the second position, the fold joint is unlocked, and a second included angle formed between a plane jointly defined by the first pivot axis and the second pivot axis and the vertical direction is an acute angle, and the second included angle is smaller than the first included angle.

[0030] In one embodiment, when the operating portion of the operating member is subjected to a pulling force to rotate the folding unlocking member to the second position, the plane jointly defined by the operating portion and the second pivot axis is parallel to the direction of the pulling force, and the direction of the pulling force is upward along the vertical direction.

[0031] In one embodiment, the fold unlocking member has a second position, and when the fold unlocking member rotates about the first pivot axis from the first position toward the second position, the fold unlocking member rotates relative to the second pivot base, thereby causing the fold joint to unlock.

[0032] In one embodiment, the operating member drives the folding unlocking member via the second pivot shaft under the action of a pulling force to rotate the folding unlocking member around the first pivot shaft from the second position toward the third position; When the folding unlocking member is in the third position, the plane jointly defined by the first pivot axis and the second pivot axis is parallel to the direction of the pulling force, and the pulling force is directed upward along the vertical direction.

[0033] In one embodiment, when the folding unlocking member rotates from the second position to the third position, the plane jointly defined by the operating portion of the operating member and the second pivot shaft is parallel to the direction of the pulling force.

[0034] In one embodiment, the folding unlocking member is provided with a position limiting recess, and the operating member is inserted into the position limiting recess and pivotally connected to the wall of the position limiting recess by the second pivot shaft.

[0035] In one embodiment, the wall of the position-limiting recess has a first side wall and a second side wall respectively located on either side of the second pivot axis, and the operating member is adapted to selectively abut against the first side wall and the second side wall and to limit the position of the operating member relative to the folding unlocking member.

[0036] In one embodiment, the first pivot axis and the second pivot axis collectively define a first plane, the second side wall is inclined relative to the first plane, and the distance between the second side wall and the first plane decreases from a position closer to the open end of the position-defining recess to a position farther from the open end of the position-defining recess.

[0037] In a second aspect, the present application further provides a child carrier, the child carrier including a support device having a connection joint installed thereon and the child carrying device described above, wherein the folding joint of the child carrying device is operably connected to the connection joint, and the folding joint, when unlocked, drives the connection joint to unlock and allow the support device to be folded.

[0038] In a third aspect, there is provided a frame that can be switched between an unfolded state and a folded state, The frame includes a first frame body, a second frame body, a rotating member, and a buffer member, the second frame body is pivotally connected to the first frame body, and when the second frame body rotates along a first rotational direction relative to the first frame body, the frame switches from the unfolded state to the folded state, the rotating member is pivotally connected to the first frame body, and the buffer member is connected to the rotating member and is used to provide an acting force to the rotating member to rotate along a second rotational direction opposite to the first rotational direction relative to the first frame body, and during the process of the second frame body rotating along the first rotational direction relative to the first frame body, the second frame body drives the rotating member to rotate along the first rotational direction relative to the first frame body.

[0039] In one embodiment, the first frame body has a first edge and a second edge, the second frame body has a third edge and a fourth edge, the first edge and the third edge form a first included angle, and the angle of the first included angle when the frame is in the unfolded state is larger than the angle of the first included angle when the frame is in the folded state. The rotating member is located in a region between the first edge and the third edge and / or abuts against the third edge of the second frame body when the second frame body rotates along the first rotation direction relative to the first frame body.

[0040] In one embodiment, a gap exists at the pivotal position between the first frame body and the second frame body, and the rotating member blocks the gap.

[0041] In one embodiment, the buffer member is an elastic member, or the buffer member is a torsion spring, the rotating member has a receiving groove, one of the torsion arms of the buffer member is connected to the first frame body, and the other of the torsion arms of the buffer member is installed in the receiving groove.

[0042] In one embodiment, the first frame body has a first main frame body and a first connection base connected to each other, and the first main frame body and the first connection base are installed at an angle; the second frame body has a second main frame body and a second connection base connected to each other, and the first connection base is pivotally connected to the second connection base.

[0043] In one embodiment thereof, when the frame is in the deployed state, the rotating member abuts against an edge of the first connecting base facing the rotating member or an edge of the second connecting base facing the rotating member.

[0044] In one embodiment, when the frame is switching from the unfolded state to the folded state, an edge of the second connection base facing the rotating member pushes the rotating member to rotate it relative to the first frame body along the first rotation direction.

[0045] In one embodiment, the first connection base has a first base body and a second base body spaced apart, the first connection base further has a recess and an opening communicating with each other, the recess is located between the first base body and the second base body, at least a portion of the second connection base is fitted in the recess, the opening is located opposite the rotating member and exposes the third edge, and when the frame switches from the unfolded state to the folded state, the third edge extends from the opening and pushes the rotating member to rotate relative to the first frame body in a first rotation direction.

[0046] In one embodiment thereof, the width of the rotating member is greater than the distance between the first base body and the second base body, and the rotating member covers at least a portion of the opening.

[0047] In one embodiment thereof, the frame further includes a first pivot shaft, the first connection base and the second connection base are pivotally connected via the first pivot shaft, the first connection base has a first portion between a connection position between the first connection base and the first main frame body and the first pivot shaft, and a second portion between the first pivot shaft and an end of the first connection base, and when the frame is in the deployed state, the rotating member shields the area in the opening corresponding to the first portion.

[0048] In one embodiment thereof, the first connection base further has a connection portion, which connects the first base body and the second base body, and forms a recess so as to be surrounded by the connection portion, the first base body, and the second base body.

[0049] In one embodiment, the first frame body is the hand frame, the second frame body is the rear leg frame, the frame further includes a front leg frame, and the hand frame is pivotally connected to the front leg frame. [Brief explanation of the drawings]

[0050] [Figure 1] FIG. 1 is a perspective view of a stroller according to a first embodiment of the present invention. [Figure 2A] FIG. 2A is an enlarged view of the rectangular portion on the left side of FIG. [Figure 2B] FIG. 2B is an enlarged view of the rectangular portion on the right side of FIG. [Figure 3A] FIG. 3A is an exploded perspective view corresponding to FIG. 2A. [Figure 3B] FIG. 3B is an exploded perspective view corresponding to FIG. 2B. [Figure 4] FIG. 4 is a perspective view of a connection structure according to a first embodiment of the present invention with an unlocking member removed. [Figure 5] FIG. 5 is a perspective view of a connection structure according to a first embodiment of the present invention, with an unlocking member, a connecting member, and a spacer member removed. [Figure 6] FIG. 6 is a perspective view of a connection structure according to a first embodiment of the present invention, with the unlocking member and the connection member removed. [Figure 7] FIG. 7 is a perspective view of the connection structure according to the first embodiment of the present invention, with the unlocking member, the second joint, and the spacer member removed. [Figure 8] FIG. 8 is a side cross-sectional view of a connection structure according to a first embodiment of the present invention. [Figure 9] FIG. 9 is a partial enlarged view of the rectangular frame in the spacer member portion of FIG. [Figure 10] FIG. 10 shows a schematic perspective view of a child carrier according to a second embodiment of the present application, with the child carrying device in a folded state, the support device in an unfolded state, and the folding joint in a locked state. [Figure 11]FIG. 11 shows a schematic cross-sectional view of the child carrier of FIG. 10 taken along line U1-U1, with the child carrying device in a folded state, the support device in an unfolded state, and the folding joint in a locked state. [Figure 12] FIG. 12 shows a schematic cross-sectional view of the child carrier of FIG. 10 taken along line U1-U1, with the child carrying device in a folded state, the support device in an unfolded state, and the folding joint in an unlocked state. [Figure 13] FIG. 13 shows a schematic cross-sectional view of the child carrier of FIG. 10 taken along line U1-U1, with both the child carrying device and the support device in a folded position and with the folding joint in an unlocked position. [Figure 14] FIG. 14 shows a schematic cross-sectional view of the child carrier of FIG. 10 taken along line U1-U1, with both the child carrying device and the support device in a folded position and with the folding joint in an unlocked position. [Figure 15] FIG. 15 shows a schematic partial cross-sectional view of the child carrier of FIG. 11 taken along line U2-U2 with the fold locking member in the locked position. [Figure 16] FIG. 16 shows a schematic partial cross-sectional view of the child carrier of FIG. 12 taken along line U3-U3, with the fold locking member in the unlocked position. [Figure 17] FIG. 17 shows a schematic perspective view of the child carrier shown in FIG. 10 with the fold locking member in the unlocked position. [Figure 18] FIG. 18 shows a schematic partial cross-sectional view of the child carrier of FIG. 17 taken along line U4-U4, with the folding locking member in the locked position. [Figure 19] FIG. 19 shows a schematic partial exploded view of the folding joint of the child carrier shown in FIG. 18 from one side. [Figure 20] FIG. 20 shows a schematic, partially exploded view of the folding joint of the child carrier shown in FIG. 18 from another angle. [Figure 21]FIG. 21 shows a schematic partial exploded view of the connection joint of the child carrier shown in FIG. 10 from one side. [Figure 22] FIG. 22 shows a schematic, partially exploded view of the connecting joint of the child carrier shown in FIG. 10 from another direction. [Figure 23] FIG. 23 is a schematic diagram of the three-dimensional structure of the frame in the third embodiment of the present invention when it is in the unfolded state. [Figure 24] FIG. 24 is a partially exploded view of an embodiment of the frame in an unfolded state. [Figure 25] FIG. 25 is a cross-sectional view of the frame in the third embodiment of the present invention when it is in the deployed state. [Figure 26] FIG. 26 is a cross-sectional view of the third embodiment of the present invention when the frame is folded. [Figure 27] FIG. 27 is a side view of the third embodiment of the present invention when the frame is in a folded state. [Figure 28] FIG. 28 is a cross-sectional view of the third embodiment of the present invention when the frame is in a folded state. DETAILED DESCRIPTION OF THE INVENTION

[0051] In order to make the above-mentioned objects, features, and advantages of the present application clearer and easier to understand, the following detailed description of specific embodiments of the present application will be provided in conjunction with the accompanying drawings. In the following description, many specific details are set forth for a thorough understanding of the present application. However, the present application can be embodied in many other forms different from those described herein, and those skilled in the art can make similar modifications without departing from the scope of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0052] It should be understood that the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" are based on the orientations or positional relationships shown in the drawings, and are merely intended to simplify the expression so as to make it easier to express the contents of the present application. They do not explicitly or implicitly state that the devices or elements referred to have a specific orientation or must be configured or operated in a specific orientation, and therefore should not be understood as limitations on the present application.

[0053] Additionally, the terms "first" and "second" are used for descriptive purposes only and should not be understood as expressing or implying relative importance or the number of technical features being referred to. Thus, a feature identified as "first" or "second" explicitly or implicitly includes at least one of that feature. In the language of this application, "plurality" means at least two, e.g., two, three, etc., unless otherwise expressly and specifically limited.

[0054] It should be noted that when an element is described as being "fixed" or "mounted" to another element, it may be directly on the other element, or there may be additional elements in between. When an element is described as being "connected" to another element, it may be directly connected to the other element, or there may be additional elements in between.

[0055] First Example A stroller typically includes a propulsion mechanism such as wheels and a handle located above the propulsion mechanism. A user propels the stroller forward by applying force to the handle. Some strollers currently on the market have a foldable handle or a height-adjustable handle, and the handle's rod is formed so that multiple joints that can rotate relative to each other are connected.

[0056] A current problem is that when multiple joints on a handle are connected by engaging a bolt and a nut, the bolt penetrates multiple joints at the same time, leaving both ends of the bolt exposed outside the multiple joints. The multiple joints are connected together by one end of the bolt abutting a joint and the other end being threadedly connected to a nut. However, when relative rotation occurs between the multiple joints, the multiple joints rotate relative to the bolt, and at this time, the multiple joints apply a rotational torque to the bolt, gradually loosening the bolt and nut.

[0057] Therefore, there is a need to provide a new connection structure that can avoid applying rotational torque to the bolt when the joints rotate relative to each other. It is also desirable for the connection structure to provide a neat appearance, particularly an appearance that hides the bolts and nuts. It is also desirable for the connection structure to integrate a locking device for locking or unlocking the relative rotation between the joints in a compact structure.

[0058] To solve the above technical problem, a connection structure and a stroller having the connection structure are provided based on a first embodiment of the present application, as shown in Figs. 1 to 9.

[0059] Referring to FIG. 1 , a stroller 1000 according to a first embodiment of the present invention will be described in detail. The stroller 1000 includes a running mechanism 1400, a lower handle 1200, an upper handle 1300, a connecting structure 1100, front legs 1500, and rear legs 1600. The running mechanism 1400, which may be a wheel, is located below the stroller 1000. The front legs 1500 and rear legs 1600 each extend upward from the running mechanism 1400. The lower handle 1200 can be connected to the running mechanism 1400 via the rear legs 1600, but the present invention is not limited to this. The upper handle 1300 extends upward from the lower handle 1200. The connecting structure 1100 is connected between the upper handle 1300 and the lower handle 1200, allowing the upper handle 1300 and the lower handle 1200 to rotate relative to each other around a horizontal axis A. In another embodiment, the connection structure 1100 can be installed on the stroller 1000 between the lower handle 1200 and the front legs 1500, between the lower handle 1200 and the rear legs 1600, or between the front legs 1500 and the rear legs 1600.

[0060] 2A and 2B, a connecting structure 1100 according to a first embodiment of the present application includes a first joint 1110 and a second joint 1120. The first joint 1110 is fixedly connected to the lower handle 1200, and the second joint 1120 is fixedly connected to the upper handle 1300, and the first joint 1110 and the second joint 1120 can rotate relative to each other around the axial direction A. In this way, the connecting structure 1100 enables the upper handle 1300 and the lower handle 1200 to rotate relative to each other.

[0061] In the first embodiment of the present application, two parallel lower handles 1200 may be provided, and the upper handle 1300 may be roughly U-shaped. Both ends of the upper handle 1300 are rotatably connected to the two lower handles 1200 via connecting structures 1100, respectively, and the two connecting structures 1100 are installed mirror-image opposite to each other along the axial direction A.

[0062] 3A and 3B, a connecting structure 1100 according to a first embodiment of the present invention will be described in detail. The connecting structure 1100 includes a first joint 1110, a second joint 1120, a connecting member 1130 (e.g., a screw having a groove at the end), a spacer member 1140, a locking member 1150, an unlocking member 1160, a resetting member 1170, and a reinforcing member 1180.

[0063] Continuing to describe the connecting structure 1100 according to the first embodiment of the present application with reference to Figures 3A and 8, the first joint 1110 includes a first disk portion 1111, and the second joint 1120 includes a second disk portion 1121. The first disk portion 1111 and the second disk portion 1121 are connected to each other so as to be rotatable relative to each other around the axial direction A. The connecting member 1130 penetrates the second joint 1120 along the axial direction A and is torsionally connected to the first joint 1110 (specifically, a screw connection), thereby fixing the connecting member 1130 relative to the first joint 1110. The connecting member 1130 does not penetrate the first joint 1110 along the axial direction A, and only one end of the connecting member 1130 in the axial direction A is exposed from the first joint 1110. At least a portion of the second joint 1120 is located between the connecting member 1130 and the first joint 1110 in a direction parallel to the axial direction A, and the second joint 1120 is restricted between the connecting member 1130 and the first joint 1110 along a direction parallel to the axial direction A, thereby preventing the first joint 1110 and the second joint 1120 from separating along the axial direction A, and the end of the connecting member 1130 exposed from the first joint 1110 in the axial direction A is also exposed from the second joint 1120 (see Figure 4 for details).

[0064] When the second disk portion 1121 rotates relative to the first disk portion 1111, the second disk portion 1121 applies a rotational torque to the connecting member 1130 that is threadedly connected to the first disk portion 1111, causing the connecting member 1130 to rotate relative to the first disk portion 1111, which may cause the connecting member 1130 to separate from the first disk portion 1111. To avoid this situation, the second disk portion 1121 of the present application is installed with a gap between it and the connecting member 1130, which prevents the second disk portion 1121 from applying a rotational torque to the connecting member 1130 and also allows the connecting member 1130 to maintain its basic function of restricting separation of the first joint 1110 and the second joint 1120 along the axial direction A.

[0065] 3A, 5 and 8, the connection structure 1100 according to the first embodiment of the present application will be further described.

[0066] The first disk portion 1111 includes a shaft portion 1112 extending in a direction parallel to the axial direction A toward the second joint 1120, and the shaft portion 1112 extends from the center of the first disk portion 1111, penetrates the center of the second disk portion 1121 along a direction parallel to the axial direction A, and is exposed to the second disk portion 1121. That is, the second joint 1120 is fitted to the outside of the shaft portion 1112, allowing the second disk portion 1121 to rotate around the shaft portion 1112 relative to the first disk portion 1111.

[0067] 7 and 8, the connection structure 1100 according to the first embodiment of the present invention will be further described.

[0068] The connecting member 1130 is inserted into the shaft portion 1112 along the axial direction A from the side of the second disk portion 1121 facing away from the first joint 1110 (i.e., the right side in FIG. 3A ) and is threadably connected to the shaft portion 1112, but does not penetrate the shaft portion 1112 along the axial direction A. At this time, it can be seen that the connecting member 1130 also penetrates the second disk portion 1121, and the shaft portion 1112 is positioned radially between the connecting member 1130 and the second joint 1120, radially separating the connecting member 1130 and the second joint 1120. This prevents the second joint 1120 from applying a rotational torque to the connecting member 1130 in the radial direction when the second joint 1120 rotates relative to the first joint 1110.

[0069] Specifically, the shaft portion 1112 is provided with a shaft hole 1112b for easy connection to the connecting member 1130. For example, the shaft hole 1112b is provided with a female thread, and the connecting member 1130 is provided with a male thread, so that the connecting member 1130 can be easily screwed into the shaft hole 1112b.

[0070] Specifically, the connecting member 1130 includes a head portion 1131 and a rod portion 1132. The rod portion 1132 is inserted into the shaft portion 1112 along the axial direction A and is threadably connected to the shaft portion 1112, thereby connecting the connecting member 1130 to the first joint 1110. The head portion 1131 is located outside the shaft portion 1112 along the axial direction A, and at least a portion of the second joint 1120 is located between the head portion 1131 and the first joint 1110 in a direction parallel to the axial direction A. By restricting the second joint 1120 to be located between the connecting member 1130 and the first joint 1110 in a direction parallel to the axial direction A, separation of the first joint 1110 and the second joint 1120 along the axial direction A is prevented. In addition, the head portion 1131 of the connecting member 1130 is exposed to the outside of the first joint 1110 and the second joint 1120 along the axial direction A (see FIG. 4 for details).

[0071] At least a portion of the second joint 1120 is located between the head portion 1131 and the first joint 1110 in a direction parallel to the axial direction A, and at least a portion of the second joint 1120 is disposed facing the head portion 1131 in a direction parallel to the axial direction A. In order to prevent the connecting member 1130 from abutting against the second joint 1120 in a direction parallel to the axial direction A, the head portion 1131 is disposed so as to be spaced apart from the second joint 1120 in a direction parallel to the axial direction A. Specifically, in the present application, a spacer member 1140 (see FIG. 8 for details) is disposed between at least a portion of the second joint 1120 and the head portion 1131 in the direction parallel to the axial direction A, thereby separating the second joint 1120 and the connecting member 1130 (specifically, the head portion 1131), and the spacer member 1140 does not rotate around the axial direction A relative to the connecting member 1130.

[0072] Continuing to describe the connecting structure 1100 based on the first embodiment of the present application with reference to Figure 8, at least a portion of the second joint 1120 is located between the spacer member 1140 and the first joint 1110 in a direction parallel to the axial direction A. That is, it will be understood that because the head portion 1131, the spacer member 1140, at least a portion of the second joint 1120, and at least a portion of the first joint 1110 are arranged in order along a direction parallel to the axial direction A, separation of the second joint 1120 and the first joint 1110 along the direction parallel to the axial direction A is prevented.

[0073] In other embodiments, the connecting member 1130 may be another type of connecting member, such as a bolt (which does not need to be connected to a nut, is threadedly connected only to the first joint 1110, and does not have a groove at its end), as long as it can prevent the second joint 1120 from disengaging from the first joint 1110 along the axial direction A.

[0074] In the first embodiment of the present application, the spacer member 1140 does not rotate around the axial direction A relative to the connecting member 1130; specifically, the spacer member 1140 does not rotate relative to the first joint 1110, and the first joint 1110 and the connecting member 1130 are fixed relative to each other.

[0075] As can be seen from the above, the head portion 1131, the spacer member 1140, the second joint 1120, and the first joint 1110 are sequentially arranged along a direction parallel to the axial direction A. That is, the second joint 1120 is arranged adjacent to the spacer member 1140, and the second joint 1120 rotates relative to the first joint 1110. Therefore, the second joint 1120 may apply a rotational torque to the spacer member 1140. To prevent the second joint 1120 from applying a rotational torque to the spacer member 1140 and further applying the rotational torque to the head portion 1131 via the spacer member 1140, the spacer member 1140 of the present application is fitted radially outside the first joint 1110, as shown in FIGS. 6 and 8. Specifically, the spacer member 1140 is fitted outside the shaft portion 1112 of the first joint 1110, and the spacer member 1140 does not rotate around the axial direction A relative to the shaft portion 1112. 9, the spacer member 1140 has an outer peripheral surface 1142 and an inner peripheral surface 1141. The inner peripheral surface 1141 of the spacer member 1140 is located outside the outer surface 1114b of the shaft portion 1112 of the first joint 1110, and the inner peripheral surface 1141 and the outer surface 1114b are arranged to have corresponding shapes (i.e., approximately the same shape) in a cross section cut perpendicular to the axial direction A, and both shapes are arranged to be non-circular, thereby preventing relative rotation of the inner peripheral surface 1141 with respect to the outer surface 1114b around the axial direction A. Referring to FIG. 9, in this case, the inner peripheral surface 1141 and the outer surface 1114b do not need to completely abut each other along the radial direction.

[0076] 8 , the head portion 1131, the spacer member 1140, the second joint 1120, and the first joint 1110 are in contact with each other in a direction parallel to the axial direction A to ensure that the spacer member 1140 and the second joint 1120 do not move between the head portion 1131 and the first joint 1110 in a direction parallel to the axial direction A. In another embodiment, the spacer member 1140 may not be in contact with the head portion 1131 in a direction parallel to the axial direction A, and the second joint 1120 may not be in contact with the first joint 1110 in a direction parallel to the axial direction A, so that the spacer member 1140 and the second joint 1120 may be able to slightly rock between the head portion 1131 and the first joint 1110.

[0077] 8, in order to more stably install the spacer member 1140 between the head portion 1131 and the second joint 1120 in the direction parallel to the axial direction A, the spacer member 1140 further abuts against the head portion 1131 and at least a portion of the first joint 1110 along the direction parallel to the axial direction A, thereby further fixing the position of the spacer member 1140 in the direction parallel to the axial direction A. In another embodiment, the second joint 1120 does not abut against the spacer member 1140 or the first joint 1110, so that the second joint 1120 may slightly rock between the spacer member 1140 and the first joint 1110 in the direction parallel to the axial direction A.

[0078] In another embodiment, the inner circumferential surface 1141 and the outer surface 1114b may be arranged to have corresponding shapes in a cross section cut perpendicular to the axial direction A, or may be arranged to be circular, and the rotation of the spacer member 1140 around the axial direction A relative to the shaft portion 1112 is restricted by utilizing only the frictional force between the inner circumferential surface 1141 and the outer surface 1114b.

[0079] The connection relationship between the spacer member 1140, the connecting member 1130, the first joint 1110, and the second joint 1120 will be described in detail below.

[0080] Referring to Figures 5, 6, 8 and 9, a first recess 1114 is recessed into the end of the shaft portion 1112 closer to the head portion 1131, facing away from the head portion 1131 and along a direction parallel to the axial direction A, the first recess 1114 is arranged so as to surround the axial direction A and is located on the outer periphery of the shaft portion 1112, the spacer member 1140 is accommodated in the first recess 1114 along a direction parallel to the axial direction A, the first recess 1114 includes a first bottom surface 1114a and an outer surface 1114b (the outer surface 1114b of the first recess 1114 is part of the outer surface of the shaft portion 1112), the extension direction of the first bottom surface 1114a is perpendicular to the axial direction A, and the outer surface 1114b is arranged so as to surround the axial direction A and extends along a direction parallel to the axial direction A. The spacer member 1140 is located between the head portion 1131 and the first bottom surface 1114a in a direction parallel to the axial direction A, and abuts against the head portion 1131 and the first bottom surface 1114a, respectively, so that the spacer member 1140 is sandwiched between the head portion 1131 and the first joint 1110 along a direction parallel to the axial direction A. Furthermore, since the outer diameter (diameter of the outer peripheral surface 1142) of the spacer member 1140 is larger than the outer diameter of the head portion 1131 of the connecting member 1130, the portion of the spacer member 1140 that exceeds the outer diameter of the head portion 1131 along the radial direction is used to abut against the second joint 1120 in a direction parallel to the axial direction A.

[0081] 5 and 6, cross sections of the inner circumferential surface 1141 and the outer surface 1114b taken perpendicular to the axial direction A each include four outwardly protruding arcs 1141a arranged in the circumferential direction, which restrict rotation of the spacer member 1140 about the axial direction A relative to the first joint 1110. In other embodiments, the cross sections of the inner circumferential surface 1141 and the outer surface 1114b taken perpendicular to the axial direction A may be square, hexagonal, or keyway shaped, as long as the spacer member 1140 does not rotate about the axial direction A relative to the first joint 1110.

[0082] 5, 6, 8, and 9, the second joint 1120 is provided with a second recess 1123 recessed in a direction parallel to the axial direction A away from the head portion 1131. The second recess 1123 is arranged to surround the shaft portion 1112 and is located radially inward of the second joint 1120. The spacer member 1140 is accommodated in the second recess 1123 along a direction parallel to the axial direction A. The second recess 1123 includes a second bottom surface 1123a and an inner surface 1123b. The extension direction of the second bottom surface 1123a is perpendicular to the axial direction A, and the inner surface 1123b is arranged to surround the axial direction A and extend along a direction parallel to the axial direction A. The spacer member 1140 is located between the head portion 1131 and the second bottom surface 1123a in a direction parallel to the axial direction A, and abuts against the head portion 1131 and the second bottom surface 1123a, respectively, so that the spacer member 1140 is sandwiched between the head portion 1131 and the second joint 1120 along a direction parallel to the axial direction A.

[0083] 6, 8, and 9, the spacer member 1140 is also located radially between the inner surface 1123b and the outer surface 1114b, and a radial gap exists between the inner surface 1123b and the outer peripheral surface 1142 of the spacer member 1140, so that the second joint 1120 can rotate about the axial direction A relative to the spacer member 1140 without applying rotational torque to the spacer member 1140. Specifically, at least one of the inner surface 1123b and the outer peripheral surface 1142 is arranged to be circular in a cross section taken perpendicular to the axial direction A. In this embodiment, both the inner surface 1123b and the outer peripheral surface 1142 are arranged to be circular in a cross section taken perpendicular to the axial direction A.

[0084] Referring to Figures 6, 8 and 9 together, there are parts where the head portion 1131 and the inner surface 1123b of the second joint 1120 are installed radially opposite each other, but since there is a gap between the head portion 1131 and the inner surface 1123b, it is possible to effectively prevent the rotational torque of the second joint 1120 from being transmitted to the connecting member 1130.

[0085] In another embodiment, the second joint 1120 does not have the second recess 1123, and the spacer member 1140 directly abuts against the surface of the second joint 1120 in a direction parallel to the axial direction A. Also, the second joint 1120 does not need to be disposed radially opposite the spacer member 1140, i.e., there is no need to provide the inner surface 1123b, and therefore the inner surface 1123b and the head portion 1131 do not face each other radially.

[0086] In another embodiment, to ensure that the spacer member 1140 does not rotate relative to the first joint 1110, the spacer member 1140 may be fixed directly onto the first joint 1110, i.e., the spacer member 1140 and the first joint 1110 may be integrally molded members.

[0087] The first joint 1110, the second joint 1120, the spacer member 1140 and the connecting member 1130 are assembled as follows.

[0088] First, the second joint 1120 is fitted onto the outside of the shaft portion 1112 in a direction parallel to the axial direction A, so that the second recess 1123 is positioned radially outside the first recess 1114 and the first bottom surface 1114a of the first recess 1114 is flush with the second bottom surface 1123a of the second recess 1123.

[0089] Next, the spacer member 1140 is accommodated in the first recess 1114 and the second recess 1123 along a direction parallel to the axial direction A, so that the spacer member 1140 abuts against the first bottom surface 1114a and the second bottom surface 1123a along a direction parallel to the axial direction A, and the spacer member 1140 is positioned radially between the outer surface 1114b of the shaft portion 1112 and the inner surface 1123b of the second joint 1120.

[0090] Finally, the rod portion 1132 of the connecting member 1130 is inserted into the shaft portion 1112 along the axial direction A and screwed into the shaft portion 1112, and the head portion 1131 is abutted against the spacer member 1140 along a direction parallel to the axial direction A.

[0091] 3A, 3B, and 8, the connection structure 1100 according to the first embodiment of the present application will be described below. The locking member 1150 is disposed between the first joint 1110 and the second joint 1120 in a direction parallel to the axial direction A and is movable between a locked position and an unlocked position along the direction parallel to the axial direction A. In the locked position, the first joint 1110 and the second joint 1120 are prevented from rotating relative to each other, and in the unlocked position, the first joint 1110 and the second joint 1120 are allowed to rotate relative to each other. The resetting member 1170 biases the locking member 1150 toward the locked position. The unlocking member 1160 is disposed so as to be operable from the outside of the connection structure 1100 to move the locking member 1150 to the unlocked position.

[0092] Specifically, the locking member 1150 is ring-shaped and includes a plurality of locking portions 1151 extending radially outward. The locking member 1150 is fitted around the shaft portion 1112 of the first joint 1110, and the locking portions 1151 are inserted into guide grooves 1113 around the shaft portion 1112 of the first joint 1110. More specifically, the locking portions 1151 are configured as a plurality of tooth-like protrusions distributed along the outer periphery of the locking member 1150 so that the entire locking member 1150 has a gear shape. The guide grooves 1113 correspond to the axial grooves of the plurality of locking portions 1151, thereby guiding the locking member 1150 to move along a direction parallel to the axial direction A. The locked position of the locking member 1150 is a position where it engages with the second joint 1120 in a direction parallel to the axial direction A, and the unlocked position is a position where it disengages from the second joint 1120 along a direction parallel to the axial direction A. It should be understood that the locking member 1150 never disengages from the guide groove 1113 of the first joint 1110, and therefore does not rotate relative to the first joint 1110.

[0093] In this embodiment, the reset member 1170 is a compression spring, and is installed between the first disk portion 1111 of the first joint 1110 and the locking member 1150, so as to urge the locking member 1150 toward the second joint 1120. Specifically, the reset member 1170 is fitted onto the outside of the shaft portion 1112, but in other embodiments, the reset member 1170 may be made of an elastic material or the like as long as it can apply a urging force to the locking member 1150.

[0094] The second disc portion 1121 of the second joint 1120 is provided with a plurality of locking grooves 1122 distributed circumferentially. When the locking member 1150 is in the locked position, the locking portions 1151 are engaged in the corresponding locking grooves 1122 of the second joint 1120. The locking member 1150 does not rotate relative to the first joint 1110, so when the locking portions 1151 of the locking member 1150 are engaged in the locking grooves 1122 of the second joint 1120, relative rotation between the first joint 1110 and the second joint 1120 is locked. Due to the plurality of locking portions 1151 being evenly distributed circumferentially and the plurality of locking grooves 1122 being correspondingly distributed circumferentially, the locking member 1150 can lock the second joint 1120 at a plurality of different rotation angles.

[0095] The unlocking member 1160 is disposed outside the first joint 1110 and the second joint 1120 along the axial direction A, so that the connecting member 1130 substantially covers the head portion 1131. The unlocking member 1160 has a decorative surface 1161 on its outer side (i.e., the side facing away from the locking member 1150), giving the connecting structure 1100 a neat appearance. The locking member 1150 is located between the resetting member 1170 and the unlocking member 1160 in a direction parallel to the axial direction A and is movably connected to the second joint 1120. Specifically, the unlocking member 1160 penetrates the second joint 1120 and abuts against the locking member 1150, pushing the unlocking member 1160 downward and inward along a direction parallel to the axial direction A (i.e., pressing it toward the locking member 1150) to move the locking member 1150 to the unlocked position. For example, the unlocking member 1160 has at least one pressing portion 1162 extending toward the locking member 1150. The pressing portion 1162 penetrates the second joint 1120 and moves relative to the second joint 1120 in a direction parallel to the axial direction A to come into contact with the locking member 1150, and has an inverted hook to prevent the pressing portion 1162 from coming off the second joint 1120 when it receives the elastic force of the resetting member 1170. This allows the user to easily operate the locking member 1150 via the unlocking member 1160.

[0096] The specific structures of the locking member 1150, unlocking member 1160, and resetting member 1170 in this embodiment allow for advantageous use of the space between the first joint 1110 and the second joint 1120, while avoiding collision with the connecting member 1130, the spacer member 1140, and the shaft portion 1112. However, it should be understood that the locking member 1150, the unlocking member 1160, and the resetting member 1170 can be configured in other ways as known in the art.

[0097] Considering that the connecting member 1130 is installed at the first joint 1110 and is used to prevent the second joint 1120 from separating from the first joint 1110 along the axial direction A, the reinforcing member 1180 is installed inside the first joint 1110 to reinforce the first joint 1110. For example, if the first joint 1110 is made of plastic and the reinforcing member 1180 is made of metal, the required strength is ensured while reducing the weight of the entire connecting structure 1100. In another embodiment, the reinforcing member 1180 can be installed outside the first joint 1110 (i.e., on the side facing away from the second joint 1120).

[0098] Referring to FIG. 7, the connection structure 1100 according to the first embodiment of the present application will be further described.

[0099] 7 clearly shows the first disk portion 1111, the shaft portion 1112, and the guide groove 1113 of the first joint 1110. As described above, the locking member 1150 moves between the locked position and the unlocked position with respect to the first joint 1110 along a direction parallel to the axial direction A, and does not disengage from the guide groove 1113 at all times.

[0100] Referring to FIG. 8, the connection structure 1100 according to the first embodiment of the present application will be further described.

[0101] 8 shows the locking member 1150 in a locked position, in which the locking member 1150 is partially positioned within the guide groove 1113 of the first joint 1110 and partially positioned within the locking groove 1122 of the second joint 1120, thereby locking relative rotation between the first joint 1110 and the second joint 1120. A user can press the locking member 1150 via the unlocking member 1160 to move the locking member 1150 toward the unlocked position (i.e., toward the right in FIG. 8 ) and disengage it from the locking groove 1122 of the second joint 1120, thereby allowing relative rotation between the first joint 1110 and the second joint 1120.

[0102] In summary, the first embodiment of the present application provides a connection structure with a loosening prevention structure. The connection member axially connects the second joint to the first joint, but the connection member and the second joint are not in direct contact with each other in either the axial or radial directions. Therefore, when the connection member contacts the second joint, the rotational torque of the second joint is transmitted to the connection member, preventing the first joint and the second joint from separating axially. It should be understood that, although the connection structure of the present application has been described in conjunction with a stroller, the connection structure can also be applied to other devices.

[0103] Second Example Foldable strollers are typically equipped with connecting joints on both sides, which can be unlocked using flexible belts, allowing the stroller seat and frame to fold synchronously. When pulling up the belts to unlock the seat, especially if the stroller or its frame is quite heavy, the flexible belts often receive unbalanced force, causing them to swing. This prevents the flexible belts from unlocking the connecting joints on both sides of the frame synchronously. Furthermore, when using the flexible belts to unlock and fold the stroller, if the flexible belts are pulled up from a position that is not approximately centered, the stroller frame or stroller will tilt, preventing the flexible belts from transmitting sufficient driving force to the connecting joints. Therefore, the user must lift the stroller and continue to swing it with force until the connecting joints are unlocked, consuming a significant amount of force. In other words, unlocking the flexible belts and folding the stroller frame or stroller may require significant force.

[0104] In order to solve the above technical problems, a child carrier and a child transporting device thereof are provided according to a second embodiment of the present invention, as shown in Figs.

[0105] Referring to FIG. 10 , a child carrier 2000 according to a second embodiment of the present invention is shown. The child carrier 2000 includes a support device 2300 and a child carrying device 2400 according to the second embodiment of the present invention, the child carrying device 2400 being mounted on the support device 2300. The child carrying device 2400 has a folding joint 2200, and the support device 2300 has a connecting joint 2100. The folding joint 2200 is connected to the connecting joint 2100, thereby connecting the child carrying device 2400 to the support device 2300. Illustratively, the folding joint 2200 is detachably connected to the connecting joint 2100, thereby connecting the child carrying device 2400 to the support device 2300. In the second embodiment of the present invention, the child carrier 2000 will be described as a stroller. The supporting device 2300 is specifically a stroller frame. Child carrying device 2400 may be a foldable seat, a folding frame for use in combination with an infant basket, or the like, and specifically, child carrying device 2400 is illustrated as a foldable seat. In alternative embodiments, the type of child carrier 2000 is not limited to a stroller, but may be, for example, a child bed frame or other product. As the type of child carrier 2000 changes, the type of support apparatus 2300 and child carrying device 2400 also changes accordingly.

[0106] Referring to FIG. 10 , in some embodiments, the structure of the child carrier 2000 is essentially symmetrical. The support device 2300 includes, for example, a handle 231, a front leg frame 232, a rear leg frame 233, and the above-mentioned connection joint 2100. The handle 231 and the front leg frame 232 are connected on the same side by one connection joint 2100, and the handle 231 and the rear leg frame 233 are pivotally connected. Referring to FIG. 15 as well, more specifically, the connection joint 2100 includes a first connection base 211 and a second connection base 212, which are pivotally connected via a pivot shaft 2101 (see FIG. 15 for details) and can rotate relative to one another. The pivot shaft 2101 is defined as a pivot axis R1 of the connection joint 2100.

[0107] Continuing to refer to FIG. 1 , the child carrier 2400 includes a seat pipe 241, a backrest pipe 242, an operating assembly 2500, and the folding joint 2200. The seat pipe 241 and the backrest pipe 242 are connected on the same side via the folding joint 2200. The folding joint 2200 includes a mounting base 221, a first pivot base 222, and a second pivot base 223. The mounting base 221, the first pivot base 222, and the second pivot base 223 are pivotally mounted by a first pivot shaft 2201 so as to be rotatable relative to one another. The first pivot shaft 2201 is defined as the pivot axis R2 of the folding joint 2200. The mounting base 221 is detachably mounted on the second connection base 212 of the connection joint 2100, thereby allowing the child carrier 2400 to be detachably mounted on the support device 2300. The second pivot base 223 has a connecting sleeve 22301, and the backrest pipe 242 is fitted with the connecting sleeve 22301.

[0108] It should be explained that, unless otherwise clearly specified or limited, directional terms such as "front," "rear," "left," and "right" in the second embodiment of the present application refer to the "front," "rear," "left," and "right" directions relative to a child riding in the child carrier, and in the drawings, arrows P and B generally indicate the "front" and "rear" directions, and arrows L and R generally indicate the "left" and "right" directions. These directional terms are used only to make the description of the second embodiment of the present application clearer, and do not unduly limit the scope of protection of the present application.

[0109] 15 and 16 show exemplary configurations of the second connection base 212 of the connection joint 2100 and the mounting base 221 of the folding joint 2200. Referring to FIGS. 21 and 22 together, the first connection base 211 is located on a first side 212a (also referred to as the outside of the second connection base 212) of the second connection base 212. A locking hole 2120 is provided on a second side 212b (also referred to as the inside of the second connection base 212) of the second connection base 212, and a U-shaped locking base 2121 protruding outward is provided on the second side 212b of the second connection base 212. The locking base 2121 is located below the locking hole 2120, and a mounting recess 21210 is provided on an end surface of the locking base 2121 (i.e., the end surface of the second side 212b of the second connection base 212). 20 , the mounting base 221 has a locking groove 2210 and a through-hole 22108 on the side facing the second connection base 212. A locking member 22101, an unlocking member 22102, and an elastic resetting member 22103 are mounted on the mounting base 221. The locking member 22101 is, for example, a lock pin. The elastic resetting member 22103 drives the locking member 22101 to extend from the through-hole 22108. The unlocking member 22102 is operably connected to the locking member 22101 and drives the locking member 22101 to retract into the through-hole 22108. When the mounting base 221 is mounted on the second connecting base 212, the locking groove 2210 of the mounting base 221 engages with the locking base 2121 of the second connecting base 212, and the locking member 22101 is inserted into the locking hole 2120. When it is necessary to remove the mounting base 221, the unlocking member 22102 is pressed, and the locking member 22101 is driven by the unlocking member 22102 to retract from the locking hole 2120. Thereafter, the locking groove 2210 of the mounting base 221 can be disengaged from the locking base 2121 of the second connecting base 212.

[0110] 15 and 16 , in some embodiments, the connection joint 2100 further includes a stopper member 213, a first unlocking member 214, and a driving member 216. The stopper member 213 is movably disposed between the first connection base 211 and the second connection base 212, and has a locked position and an unlocked position. The first unlocking member 214 is operably connected to the stopper member 213 via the driving member 216, and drives the first unlocking member 214 to indirectly move the stopper member 213 from the locked position to the unlocked position. In some embodiments, a chamber 210 is formed between the first connection base 211 and the second connection base 212, and the stopper member 213 may be a lock gear, and the stopper member 213 is axially movably disposed within the chamber 210. 21 and 22, the pivot shaft 2101 penetrates a central hole 21100 of the first connection base 211, a central hole 21300 of the stopper member 213, and a central hole 21200 of the second connection base 212. Referring to FIGS. 21 and 22, in some embodiments, the first connection base 211 has a first internal gear 2113, and the second connection base 212 has a second internal gear 2123. Referring to FIG. 15, when the stopper member 213 is in the locked position, the stopper member 213 simultaneously meshes and engages with the first internal gear 2113 and the second internal gear 2123, thereby locking the relative positions of the first connection base 211 and the second connection base 212. 16 , when the stopper member 213 is in the unlocked position, the stopper member 213 moves along the pivot shaft 2101 into the first connection base 211 and disengages from the second internal gear 2123 of the second connection base 212, allowing the first connection base 211 and the second connection base 212 to rotate relative to each other. In some alternative embodiments, the stopper member 213 may have other embodiments, such as a plug-type structure, and the present application is not limited thereto.

[0111] 21 and 22, in some embodiments, a resilient reset member 215 may be mounted within the chamber 210, and the resilient reset member 215 is used to apply a force to the stopper member 213 to return the stopper member 213 to the locked position. In some embodiments, the resilient reset member 215 is, for example, a spring, and the spring is mounted between the first connection base 211 and the stopper member 213. In some alternative embodiments, depending on the embodiment of the stopper member 213, the embodiment of the resilient reset member 215 may be changed accordingly.

[0112] 21 and 22 , the stopper member 213 has at least one position-limiting tooth 2131, and the tooth width of the position-limiting tooth 2131 is wider than the teeth of the other tooth structures on the stopper member 213. Correspondingly, the first internal gear 2113 has at least one first position-limiting tooth groove 21131, and the second internal gear 2123 has at least one second position-limiting tooth groove 21231. The number of first position-limiting tooth grooves 21131 and second position-limiting tooth grooves 21231 corresponds to the number of position-limiting teeth 2131. The at least one position-limiting tooth 2131 is suitable for meshing and engaging with the at least one first position-limiting tooth groove 21131 and the at least one second position-limiting tooth groove 21231, respectively. For example, two position-limiting teeth 2131 are provided, and the two position-limiting teeth 2131 are distributed axially symmetrically around the outer periphery of the stopper member 213. When the support device 2300 is in an unfolded state, the first position-limiting tooth groove 21131 corresponds one-to-one with the second position-limiting tooth groove 21231, and both ends of the position-limiting tooth 2131 are suitable for meshing and engaging with the first position-limiting tooth groove 21131 and the second position-limiting tooth groove 21231 respectively, the connection joint 2100 is in a locked state, and the first connection base 211 cannot rotate relative to the second connection base 212. When the support device 2300 switches between the unfolded state and the folded state, the stopper member 213 is located within the first connection base 211 and disengaged from the second connection base 212, the first connection base 211 rotates relative to the second connection base 212, the second position limiting tooth groove 21231 and the first position limiting tooth groove 21131 (i.e., the position limiting tooth 2131) are misaligned with each other, and the end of the second internal gear 2123 blocks the position limiting tooth 2131 and resists the acting force of the elastic reset member 215 on the stopper member 213, restricting the stopper member 213 from moving to the locked position and restricting engagement between the stopper member 213 and the second internal gear 2123 of the second connection base 212. As a result, the position of the stopper member 213 is restricted to the unlocked position, allowing the first connection base 211 and the second connection base 212 to continue to rotate relative to each other, and the support device 2300 is switched to the folded state.In this way, the carrier device 2100 can be switched between the unfolded state and the folded state without having to continuously press the first lock release member 214, making the operation easy.

[0113] 15 and 16 , the driving member 216 is sandwiched between the first unlocking member 214 and the stopper member 213, and the first unlocking member 214 indirectly drives the stopper member 213 via the driving member 216. In some embodiments, the driving member 216 includes, for example, a third pushing portion 2161 and a third abutting portion 2162, where the third abutting portion 2162 is, for example, disk-shaped, and the third pushing portion 2161 is, for example, at least one leg extending from the third abutting portion 2162. The third abutting portion 2162 is located within the mounting recess 21210 and abuts against the first pushing portion 2141 of the first unlocking member 214. At least one through hole 21208 is provided in a wall of the second connection base 212 located between the mounting recess 21210 and the chamber 210, and the third push portion 2161 is inserted into the through hole 21208 and abuts against the stopper member 213. The third push portion 2161 is slidably engaged with the through hole 21208 and guides the axial movement of the drive member 216 on the pivot shaft 2101. Providing the drive member 216 that moves along the axial direction reduces the difficulty in designing the first lock release member 214; it is sufficient for the first lock release member 214 to simply push and move the drive member 216 via the first push portion 2141. In some alternative embodiments, the driving member 216 can be omitted, and the first pushing portion 2141 of the first unlocking member 214 includes a protruding structure (not shown), such as at least one leg or cylinder, which passes through at least one through-hole 21208 of the second connecting base 212 and directly contacts the stopper member 213. This helps reduce the number of parts and makes assembly easier.

[0114] 15 and 16, in some embodiments, the first unlocking member 214 is mounted on the second connection base 212. Specifically, the first unlocking member 214 is pivotally connected to the second connection base 212 via a first axis 21211 perpendicular to the pivot axis 2101. The first unlocking member 214 includes a first pushing portion 2141 and a first abutting portion 2142, and the first pushing portion 2141 extends from the first abutting portion 2142, for example. When the first unlocking member 214 receives an external driving force (for example, an external force applied directly to the first abutting portion 2142 or an external force indirectly transmitted to the first abutting portion 2142 via the folding joint 2200), the first unlocking member 214 rotates around the first axis 21211, and at the same time, the first pushing portion 2141 directly or indirectly pushes the stopper member 213, moving the stopper member 213 from the locked position to the unlocked position. It should be understood that the external driving force refers to a force from outside the connection joint 2100 in which the first unlocking member 214 is located. Referring to FIGS. 21 and 22 , the first unlocking member 214 is located on the second side 212b of the second connecting base 212, and the second side 212b of the second connecting base 212 is used to connect with the mounting base 221. In some embodiments, the first unlocking member 214 is located in the mounting recess 21210. When the child carrying device 2400 is attached to the support device 2300, the first unlocking member 214 is shielded by the mounting base 221, thereby preventing the first unlocking member 214 from malfunctioning. More specifically, when the child carrying device 2400 is in the unfolded state and supporting a child, the support device 2300 is prevented from being folded unexpectedly due to malfunction of the first unlocking member 214.

[0115] 15 and 16 , in some embodiments, the connection joint 2100 further includes a second unlocking member 217 operably connected to the first unlocking member 214. The second unlocking member 217 is located in the mounting recess 21210 and pivotally connected to the second connection base 212 via a second shaft 21212. The second shaft 21212 and the first shaft 21211 are parallel to each other. A first end of the second unlocking member 217 engages with the first unlocking member 214. A second end of the second unlocking member 217 has a second abutment 2172. When the second unlocking member 217 is not receiving an external driving force, the second abutment 2172 protrudes outward from the second connection base 212. When the second abutment portion 2172 of the second unlocking member 217 receives an external driving force, the first unlocking member 214 is driven to rotate via the engagement between the first end of the second unlocking member 217 and the first unlocking member 214. In other words, by pressing the second abutment portion 2172 of the second unlocking member 217, the first unlocking member 214 can be indirectly driven to rotate. It should be understood that the external driving force refers to a force from outside the connection joint 2100 in which the second unlocking member 217 is located. The first unlocking member 214 has a first connecting portion 2143 fitted on the first shaft 21211, and the first connecting portion 2143 has a first tooth structure (teeth) 21431. The second unlocking member 217 has a second connecting portion 2171 fitted on the second shaft 21212, and the second connecting portion 2171 has a second tooth structure (teeth) 21711. The first tooth structure 21431 of the first connecting portion 2143 engages with the second tooth structure 21711 of the second connecting portion 2171. The gear interlocking between the first unlocking member 214 and the second unlocking member 217 can increase the pushing stroke of the first unlocking member 214, reduce the pushing force of the second unlocking member 217, and increase the pushing stability of the second unlocking member 217, thereby improving the stability and effectiveness of the unlocking process of the connection joint 2100 and enabling the connection joint 2100 to be quickly folded. In alternative embodiments, the first unlocking member 214 and the second unlocking member 217 may be engaged or movably connected by other suitable structures.

[0116] 15, 16, 21, and 22, in some embodiments, the connection joint 2100 may further include a fixed frame 218. The fixed frame 218 may include, for example, two opposing side walls 2182 and a plate 2181 connected between the two side walls 2182. The plate 2181 and the two side walls 2182 define a recess 2180. A first mounting hole 21821 and a second mounting hole 21822 are provided on the two side walls 2182. The first shaft 21211 is mounted in the first mounting hole 21821, and the second shaft 21212 is mounted in the second mounting hole 21822. The first connecting portion 2143 and the second connecting portion 2171 are housed in the recess 2180. The fixed frame 218 is mounted within the mounting recess 21210, and the plate 2181 partially closes the opening of the mounting recess 21210, preventing external components from interfering with the engagement between the first connecting portion 2143 and the second connecting portion 2171.

[0117] 15 and 16 , in some embodiments, when the first unlocking member 214 is driven by the second unlocking member 217 or the folding joint 2200, or is directly pressed and driven, the first unlocking member 214 rotates about the first shaft 21211, and the rotation of the first unlocking member 214 drives the drive member 216 to unlock the stopper member 213, thereby moving the stopper member 213 from the locked position to the unlocked position. When the driving force applied to the first unlocking member 214 is removed, the first elastic reset member 215 drives the stopper member 213 to reset the stopper member 213 from the unlocked position to the locked position, and accordingly, the drive member 216 is reset by driving the stopper member 213, and the first unlocking member 214 is reset by driving the drive member 216. In some alternative embodiments, a torsion spring may be mounted on the first shaft 21211 to reset the first unlocking member 214.

[0118] 11-16, the child carrier 2400 of FIG. 10, the folding joint 2200 of the child carrier 2400, and the general structure of the handling assembly 2500 are shown.

[0119] 15 and 16, the operating assembly 2500 is operably connected to the folding joint 2200, and the operating assembly 2500 can drive the folding joint 2200 to switch it from a locked state to an unlocked state (i.e., the operating assembly 2500 can unlock the folding joint 2200). The folding joint 2200 includes a push member 227, a folding lock member 228, the above-mentioned mounting base 221, a first pivot base 222, and a second pivot base 223. 19 and 20, the first pivot shaft 2201 penetrates through a central hole 22100 of the mounting base 221, a central hole 22200 of the first pivot base 222, and a central hole 22300 of the second pivot base 223, and the mounting base 221, the first pivot base 222, and the second pivot base 223 are pivoted by the first pivot shaft 2201 and can rotate relative to each other. The first pivot shaft 2201 is defined as the pivot axis R2 of the folding joint 2200. The first pivot base 222 is sandwiched between the mounting base 221 and the second pivot base 223, i.e., the first pivot base 222 is installed on the side of the second pivot base 223 facing the mounting base 221. The folding lock member 228 is installed between the first pivot base 222 and the mounting base 221, and is suitable for locking relative rotation between the first pivot base 222 and the mounting base 221. The push member 227 is installed between the operating assembly 2500 and the second pivot base 223 (i.e., the push member 227 is provided on the side of the second pivot base 223 facing away from the mounting base 221). The push member 227 is suitable for engaging with the operating assembly 2500 to indirectly or directly drivably connect the folding lock member 228, and the operating assembly 2500 is suitable for indirectly or directly driving the folding lock member 228 via the push member 227 to unlock the relative rotation between the first pivot base 222 and the mounting base 221.

[0120] 15, 16, and 18, in some embodiments, a chamber 220 is formed between the mounting base 221 and the first pivot base 222, and a folding lock member 228 is housed in the chamber 220. The folding lock member 228 may be a toothed wheel, and its central hole (see FIG. 20) 22800 is fitted on the first pivot shaft 2201. The folding lock member 228 is axially movably disposed within the chamber 220, and has a locked position and an unlocked position. When the folding lock member 228 is in the locked position, the folding lock member 228 simultaneously meshes and engages with the mounting base 221 and the first pivot base 222, thereby locking the relative positions of the mounting base 221 and the first pivot base 222, and the folding joint 2200 is in a locked state. When the folding lock member 228 is in the unlocked position, the folding lock member 228 moves along the first pivot axis 2201 into the mounting base 221 and disengages from the first pivot base 222, allowing the mounting base 221 and the first pivot base 222 to rotate relative to each other, and the folding joint 2200 is in an unlocked state. In some embodiments, a resilient reset member 226 is further installed in the chamber 220, and the resilient reset member 226 is used to drive the folding lock member 228 to move to the locked position. The resilient reset member 226 is, for example, a spring, and is sandwiched between the mounting base 2221 and the folding lock member 228.

[0121] 19 and 20 , the folding lock member 228 is provided with an external gear 2283, which includes at least one position-limiting tooth 22831, with a tooth width of the position-limiting tooth 22831 being greater than that of the other teeth on the external gear 2283. Accordingly, the first pivot base 222 is provided with a first internal gear 2224, which has at least one first position-limiting tooth groove 22241 formed therein, and the mounting base 221 is provided with a second internal gear 2214, which has at least one second position-limiting tooth groove 22141 formed therein. When the folding lock member 228 is in the locked position, the position-limiting tooth 22831 is suitable for meshing and engaging with the first position-limiting tooth groove 22241 and the second position-limiting tooth groove 22141, respectively. 15 , when the child carrier 2400 is in the unfolded state (not shown), the first position limiting tooth grooves 22241 correspond one-to-one to the second position limiting tooth grooves 22141, and each position limiting tooth 22831 of the folding lock member 228 meshes with the corresponding first position limiting tooth groove 22241 and the corresponding second position limiting tooth groove 22141 (i.e., in the direction of the pivot axis R2, a portion of each position limiting tooth 22831 meshes with the corresponding first position limiting tooth groove 22241, and another portion of each position limiting tooth 22831 meshes with the corresponding second position limiting tooth groove 22141), thereby restricting relative rotation between the first pivot-mounting base 222 and the mounting base 221. Referring also to Figure 16, when the child carrier 2400 switches between the unfolded state and the folded state, the folding lock member 228 is located within the mounting base 221 and is disengaged from the first pivot base 222, the first pivot base 222 rotates relative to the mounting base 221, the second position-limiting tooth groove 22141 and the first position-limiting tooth groove 22241 are offset from each other, and the end of the first internal gear 2224 blocks the position-limiting tooth 22831 to resist the force applied to the folding lock member 228 by the elastic reset member 226 (see Figure 18), thereby limiting the movement of the folding lock member 228 to the locked position, thereby limiting the engagement of the folding lock member 228 with the first internal gear 2224 of the first pivot base 222.As a result, the folding lock member 228 is restricted to the unlocked position, and the first pivot base 222 and the mounting base 221 can continue to rotate relative to each other, switching the child carrier 2400 to the folded state. As a result, even without continuously applying external force to the operating assembly 2500, the folding lock member 228 can be held in the unlocked position, allowing the first pivot base 222 and the second pivot base 223 to rotate downward about their axes under the action of gravity, making operation easier.

[0122] 15, 16, and 18, the folding lock member 228 is provided with at least one finger 2281, and at least one through-hole 22107 is provided on the wall of the mounting base 221 between the locking groove 2210 and the chamber 220. The at least one finger 2281 is adapted to pass through the at least one through-hole 22107 and press the first unlocking member 214 to rotate the first unlocking member 214 around the first axis 21211. Illustratively, the folding lock member 228 is provided with a plurality of fingers 2281, for example, two fingers 2281. The multiple fingers 2281 are evenly arranged around the circumferential direction of the folding lock member 228 and jointly guide the axial movement of the folding lock member 228. Each finger 2281 is slidably engaged with a corresponding through-hole 22107. It will be understood that the sliding direction of each finger 2281 is parallel to the first pivot shaft 2201. As the folding lock member 228 switches between the locked position and the unlocked position, at least one finger 2281 extends and contracts relative to the through-hole 22107. Referring to FIGS. 15 and 16 , in the process of the folding lock member 228 moving from the locked position to the unlocked position, at least one finger 2281 protrudes relative to at least one through-hole 22107 and directly pushes the first abutment portion 2142 of the first unlocking member 214, thereby rotating the first unlocking member 214 around the first shaft 21211 and simultaneously driving the stopper member 213 directly or indirectly (with or without the drive member 216) to move it from the locked position to the unlocked position. That is, when the folding joint 2200 is unlocked, the connecting joint 2100 is driven to unlock, allowing the support device 2300 to be folded.

[0123] 18 to 20 , in some embodiments, a movable piece 229 is further mounted within the chamber 220. The movable piece 229 is seated on the first pivot shaft 2201 via a central hole 2290, and is located between the folding locking member 228 and the first pivot base 222. At least one abutment post 2291 is installed on the movable piece 229, and the abutment post 2291 extends in a direction facing away from the folding locking member 228. The first pivot base 222 has at least one through hole 22203, and the abutment post 2291 is slidably engaged with the through hole 22203. The folding locking member 228 is drivably connected to the push member 227 via the movable piece 229 and the abutment post 2291.

[0124] 18-20, in some embodiments, the central hole 22700 of the push member 227 is seated on the first pivot shaft 2201 (see FIG. 15). The push member 227 has at least one push post 2271, and the second pivot base 223 has at least one through hole 22303, with the at least one push post 2271 slidingly engaged with the at least one through hole 22303. The at least one push post 2271 is used to push the at least one abutment post 2291, causing the movable piece 229 to push the folding lock member 228 and move from the locked position to the unlocked position. In some embodiments, the folding joint 2200 may further include an elastic reset member 2232, which is used to drive the push member 227 to move away from the movable piece 229. The elastic reset member 2232 is, for example, a spring, and is sandwiched between the push member 227 and the second pivot base 223 .

[0125] 11 to 14 , in some embodiments, the operating assembly 2500 includes an operating member 251 and a folding unlocking member 252. The folding unlocking member 252 is operably connected to the folding joint 2200 and drives the folding joint 2200 to unlock it. The folding unlocking member 252 is pivotally mounted on the first pivot shaft 2201 and can rotate relative to the second pivot base 223, thereby driving the push member 227 to move along the axial direction and causing the push post 2271 of the push member 227 to push the abutment post 2291 of the movable piece 2221 to unlock the folding joint 2200. 11 and 13, the folding unlocking member 252 has a first position and a second position, and when the folding unlocking member 252 is in the first position, the folding joint 2200 is in a locked state, and when the folding locking member 228 is in the locked state, the first pivotal base 222 is restricted from rotating relative to the mounting base 221 by the folding locking member 228. Referring to FIG. 12, when the folding unlocking member 252 rotates from the first position to the second position, the folding unlocking member 252 rotates relative to the second pivotal base 223 and indirectly unlocks the folding joint 2200 via the push member 227 (i.e., indirectly drives the folding locking member 228 from the locked position to the unlocked position via the push member 227), allowing the first pivotal base 222 to rotate relative to the mounting base 221. For example, two folding unlocking members 252 are provided, and the two folding unlocking members 252 are connected to the folding joints 2200 on both the left and right sides, respectively. For example, there is one operating member 251, and the operating member 251 is connected to two folding unlocking members 252, respectively.

[0126] For ease of explanation, the following description will be given using one of the folding unlocking members 252 and the folding joint 2200 connected to the folding unlocking member 252 as an example.

[0127] 19 and 20 , in some embodiments, a first engagement portion is provided on the folding unlocking member 252 and a second engagement portion is provided on the push member 227. The first engagement portion is in a concave-convex shape with the second engagement portion and is slidably disposed relative to the second engagement portion along the surface of the second engagement portion. The first engagement portion has at least one first protrusion 2521 and at least one first recess 2529. Each first protrusion 2521 at least partially defines the wall of an adjacent first recess 2529, and there is a smooth transition between the highest point of each first protrusion 2521 and the lowest point of the adjacent first recess 2529. The at least one first protrusion 2521 includes, for example, at least one tooth structure. Exemplarily, at least two first protrusions 2521 are provided, and a first recess 2529 is formed between two adjacent first protrusions 2521. The second engagement portion has at least one second protrusion 2272 and at least one second recess 2273. The at least one second protrusion 2272 can be engaged with at least one first recess 2529, and the at least one second recess 2273 can be engaged with at least one first protrusion 2521. Each second protrusion 2272 at least partially defines the wall of the adjacent second recess 2273, and there is a smooth transition between the highest point of each second protrusion 2272 and the lowest point of the adjacent second recess 2273. This makes it easier for each first protrusion 2521 to exit from the corresponding second recess 2273. Specifically, the at least one second protrusion 2272 includes, for example, at least one tooth structure.

[0128] When the folding unlocking member 252 is in the first position, at least one first protrusion 2521 is engaged with at least one second recess 2273, and at least one second protrusion 2272 is engaged with at least one first recess 2529. That is, the first engagement portion and the second engagement portion are engaged with each other. When the folding unlocking member 252 rotates from the first position to the second position, the first engagement portion slides along the surface of the second engagement portion, causing the at least one first protrusion 2521 to abut against the at least one second protrusion 2272, thereby pushing the push member 227 and moving it along the first pivot shaft 2201 in a direction away from the folding unlocking member 252. The push member 227 abuts against the abutment post 2291 of the movable piece 229 via its push post 2271, driving the folding locking member 228 to move to the unlocked position. It will be understood that when the user stops applying force to the operating member 251, the push member 227 will tend to reset by moving in a direction away from the second pivot base 223 (i.e., toward the folding unlock member 252) under the action of the elastic reset member 2232, and when at least one second protrusion 2272 of the push member 227 and at least one first protrusion 2521 of the folding unlock member 252 are misaligned (i.e., at least one second protrusion 2272 of the push member 227 faces at least one first recess 2529 of the folding unlock member 252, and at least one first protrusion 2521 of the folding unlock member 252 faces at least one second recess 2273 of the push member 227), the push member 227 will be reset by the driving of the elastic reset member 2232. It will be understood that the abutment of at least one first convex portion 2521 with at least one second convex portion 2272 refers to the abutment of at least one highest point in the first convex portion 2521 with at least one highest point in the second convex portion 2272.

[0129] 19 and 20 , in some embodiments, the second pivot base 223 and the folding unlocking member 252 are provided with a rotation position limiting mechanism to limit the range of relative rotation therebetween (i.e., to limit the axial rotation stroke of the folding unlocking member 252). For example, an arc-shaped groove 22305 can be provided on the second pivot base 223, and an arc-shaped protrusion 2525 can be provided on the folding unlocking member 252, with the arc-shaped protrusion 2525 positioned within the arc-shaped groove 22305. Both ends of the arc-shaped protrusion 2525 can selectively abut against both ends of the arc-shaped groove 22305, thereby limiting the range of relative rotation between the second pivot base 223 and the folding unlocking member 252. In some embodiments, the positions of the arc-shaped groove 22305 and the arc-shaped protrusion 2525 on the second pivot base 223 and the folding unlocking member 252 are interchangeable.

[0130] 11 to 14, the folding unlocking member 252 includes a main body 2522. The main body 2522 is roughly disk-shaped, and the first pivot shaft 2201 penetrates the main body 2522 at approximately its center. Referring to FIGS. 19 and 20 together, the arc-shaped protrusion 2525 and the first protrusion 2521 are provided on the side of the main body 2522 facing the push member 227 (also referred to as the inside of the folding unlocking member 252). A position limiting recess 2523 is provided on the main body 2522, and the opening of the position limiting recess 2523 is formed in a portion approximately at the outer periphery of the main body 2522. The position limiting recess 2523 is used for connection with the operating member 251.

[0131] 11 to 14 , in some embodiments, the operating member 251 is a rigid member and is pivotally connected to the folding unlocking member 252 by a second pivot shaft 2501, allowing the operating member 251 to rotate relative to the folding unlocking member 252. The second pivot shaft 2501 is defined by a pivot axis R3 of the operating member 251. The second pivot shaft 2501 is parallel to and offset from the first pivot shaft 2201. The operating member 251 is adapted to rotate the folding unlocking member 252 relative to the second pivot base 223 (i.e., relative to the folding joint 2200). Specifically, the operating member 251 is adapted to rotate the folding unlocking member 252 relative to the second pivot base 223 (i.e., relative to the folding joint 2200) by the second pivot shaft 2501, thereby unlocking the folding joint 2200. Compared to when the axes of the second pivot shaft 2501 and the first pivot shaft 2201 are coaxially disposed, by displacing the second pivot shaft 2501 from the first pivot shaft 2201 in this embodiment, the torque corresponding to the force applied by the user to the operating member 251 is increased, further reducing the force required for the unlocking operation. In addition, by pivotally connecting the rigid operating member 251 and the folding unlocking member 252, it is possible to prevent the operating member 251 from being distorted when operated, which would otherwise prevent the operating member 251 from transmitting sufficient driving force to the folding joint 2200. The rigid structure of the operating member 251 allows the direction in which the operating member 251 receives force to be appropriately controlled, allowing the operating member 251 to transmit driving force more effectively to the folding joint 2200. Furthermore, since there is no situation in which both folding joints 2200 receive uneven force and are unable to unlock simultaneously, the child carrier 2000 can be folded more efficiently and with less force.

[0132] The operating member 251 is pivotally connected to a wall of the position limiting recess 2523 by a second pivot shaft 2501. Specifically, a pivot hole 2520 is formed on the wall of the position limiting recess 2523, an end of the operating member 251 is inserted into the position limiting recess 2523, and a pivot hole 2510 is formed at the end, and the second pivot shaft 2501 penetrates through the pivot holes 2520 and 2510, thereby pivoting one end of the operating member 251 to the wall of the position limiting recess 2523. The position limiting recess 2523 has a first side wall 25231 and a second side wall 25232, which are located on both sides of the second pivot shaft 2501, respectively. The operating member 251 is adapted to be selectively blocked by the first side wall 25231 and the second side wall 25232, thereby limiting the position and rotation angle range of the operating member 251 relative to the folding unlocking member 252. Specifically, the operating member 251 has a first position limiting position and a second position limiting position, and when the operating member 251 is in the first position limiting position, the operating member 251 abuts against the first side wall 25231, and when the operating member 251 is in the second position limiting position, the operating member 251 abuts against the second side wall 25232. The folding unlocking member 252 has a first position, and when the folding unlocking member 252 is in the first position, the operating member 251 is in the first position limiting position.

[0133] 11 to 14, when the operating member 251 is subjected to the action of the tensile force F, the operating member 251 can rotate relative to the folding unlocking member 252 around the second pivot shaft 2501, and the operating member 251 can rotate the folding unlocking member 252 from the first position to the second position via the second pivot shaft 2501 to lock the folding joint 2200, and can further rotate the folding unlocking member 252 from the second position to a third position via the second pivot shaft 2501. When the folding unlocking member 252 is in the first position, the tensile force F applied to the operating member 251 has a vertically upward component. When the folding unlocking member 252 is moved by the operating member 251 and rotated to the second position, the direction of the tensile force F applied to the operating member 251 becomes vertically upward. During the process of the folding unlocking member 252 rotating from the second position to the third position, the folding joint 2200 is maintained in the unlocked state, and the direction of the pulling force F applied to the operating member 251 is maintained in the vertically upward direction.

[0134] 10 to 14, the operating member 251 is provided with an operating portion 2512 suitable for operation. The operating portion 2512 is spaced apart from the second pivot shaft 2501. The operating member 251 is, for example, roughly U-shaped. The operating member 251 includes two connecting portions 2511 and a crossbar connected between the two connecting portions 2511, and the crossbar is formed as the operating portion 2512. Each connecting portion 2511 is, for example, rod-shaped. The two connecting portions 2511 are pivotally connected to the two folding unlock members 252 via the second pivot shaft 2501, respectively. In this way, when the operating portion 2512 of the operating member 251 is operated, the folding joints 2200 on both the left and right sides can be unlocked simultaneously. Furthermore, since the operating member 251 is rigid and undergoes little deformation when operated (it can even be ignored), even if the position receiving the force of the operating member 251 is shifted from the center of the operating part 2512, the child carrier 2000 is unlikely to tilt, and the folding joints 2200 on both the left and right sides can be unlocked simultaneously.

[0135] 11 , in some embodiments, when the folding unlock member 252 is in the first position, the folding joint 2200 is in a locked state, and the operating portion 2512 of the operating member 251 is located above the horizontal plane including the first pivot shaft 2201 and / or above the horizontal plane including the second pivot shaft 2501. This allows the operating portion 2512 of the operating member 251 to be easily pulled up. It should be understood that "the operating portion 2512 of the operating member 251 is located above the horizontal plane including the first pivot shaft 2201 and / or above the horizontal plane including the second pivot shaft 2501" includes the following different embodiments. In Form 1, the operating portion 2512 of the operating member 251 is located above the horizontal plane including the first pivot shaft 2201 but below the horizontal plane including the second pivot shaft 2501. In a second embodiment, the operating section 2512 of the operating member 251 is located above a horizontal plane including the second pivot shaft 2501, but below a horizontal plane including the first pivot shaft 2201. In a third embodiment, the operating section 2512 of the operating member 251 is located above a horizontal plane including the first pivot shaft 2201, and above a horizontal plane including the second pivot shaft 2501. In other words, the operating section 2512 of the operating member 251 is located above a horizontal plane including at least one of the first pivot shaft 2201 and the second pivot shaft 2501. In this embodiment, when the folding unlocking member 252 is in the first position, the operating portion 2512 of the operating member 251 is located above a horizontal plane including the first pivot shaft 2201 and above a horizontal plane including the second pivot shaft 2501, and a first included angle θ1 between a plane jointly defined by the first pivot shaft 2201 and the second pivot shaft 2501 (i.e., first plane S1) and the vertical direction is an acute angle. In some embodiments not shown, the first included angle θ1 may be a right angle or an obtuse angle, and is not limited to this specification. Continuing to refer to FIG. 11 , in some embodiments, when the folding unlocking member 252 is in the first position, the plane jointly defined by the operating portion 2512 and the second pivot shaft 2501 (i.e., second plane S2) is coplanar with the plane jointly defined by the first pivot shaft 2201 and the second pivot shaft 2501.It should be understood that "a plane jointly defined by the first pivot shaft 201 and the second pivot shaft 501" refers to a plane that also includes the pivot axis R2 of the first pivot shaft 201 and the pivot axis R3 of the second pivot shaft 501, and "a plane jointly defined by the operating portion 2512 and the second pivot shaft 2501" refers to a plane that also includes approximately the center of the operating portion 2512 and the pivot axis R3 of the second pivot shaft 2501.

[0136] When the folding unlocking member 252 rotates from the first position to the second position, the folding unlocking member 252 rotates relative to the second pivot base 223 of the folding joint 2200, thereby driving the folding joint 2200 to unlock. When the folding unlocking member 252 rotates to the second position, both the folding joint 2200 and the connecting joint 2100 are unlocked, allowing the child carrier 2000 to be folded. Furthermore, when the folding unlocking member 252 rotates to the second position, the second included angle θ2 formed by the first plane S1 and the vertical direction becomes an acute angle, and the second included angle θ2 is smaller than the first included angle θ1. At this time, the second plane S2 is parallel to the direction of the tensile force F received by the operating member 251, and the tensile force F is directed upward along the vertical direction.

[0137] When operating member 251 is subsequently pulled up, operating member 251 rotates fold unlocking member 252 around first pivot shaft 2201 from the second position to the third position via second pivot shaft 2501 under the action of tensile force F. When fold unlocking member 252 is in the third position, first plane S1 is parallel to the direction of tensile force F, tensile force F is directed vertically upward, and fold joint 2200 is in an unlocked state. During the process of rotating fold unlocking member 252 from the second position to the third position, second plane S2 remains parallel to the direction of tensile force F, tensile force F remains directed vertically upward, and fold joint 2200 and connection joint 2100 are both in an unlocked state, causing child carrier 2000 to automatically fold under the action of gravity.

[0138] To reduce the volume of the child carrier 2000 or child carrying device 2400 after folding, when the operating member 251 is rotated toward the second side wall 25232 of the position limiting recess 2523 (also referred to as the direction in which the fold unlocking member 252 rotates from the first position to the third position), the operating member 252 and the inner wall of the second side wall 25232 abut against each other, causing the operating member 251 to move out of the vertical direction. This reduces the vertical volume of the child carrying device 2400. In some embodiments, the second side wall 25232 is inclined with respect to the first plane S1, and the distance between the second side wall 25232 and the first plane S1 decreases from a position closer to the open end of the position limiting recess 2523 to a position farther from the open end of the position limiting recess 2523.

[0139] The folding operation of child carrier 2000 will be briefly described below with reference to FIGS.

[0140] When it is necessary to fold the child carrier 2000, first, the backrest pipe 242 is pushed forward and downward. Due to the recessed and projecting engagement between the first engagement portion and the second engagement portion, the backrest pipe 242 moves the folding unlocking member 252 via the second pivot base 223 and rotates together with the folding unlocking member 252. During this process, the operating member 251 is blocked by the first side wall 25231, so the operating member 251 rotates together with the folding unlocking member 252. Referring to Figures 11, 15, 19 and 20 in addition, when the backrest pipe 242 is folded to a predetermined position, the folding unlocking member 252 is located in the first position, the push pillar 2271 of the push member 227 is aligned with the abutment pillar 2291 of the movable piece 229, and the folding joint 2200 is in the locked state. Thereafter, when a pulling force F is applied to the operating portion 2512 of the operating member 251, the operating member 251 rotates relative to the folding unlocking member 252, and at the same time, the folding unlocking member 252 is rotated toward the second position relative to the second pivot base 223 and the mounting base 221 via the second pivot shaft 2501. In the process of the folding unlocking member 252 rotating toward the second position, the push member 227 moves along the axial direction, and the push pillar 2271 thereof pushes the abutment pillar 2291 of the movable piece 229, moving the movable piece 229 along the axial direction, and the axial movement of the movable piece 229 drives the folding locking member 228 to move toward the unlocked position. 12 and 16, when the folding unlocking member 252 is in the second position, at least one first protrusion 2521 of the first engaging portion abuts against at least one second protrusion 2272 of the second engaging portion, and the pushing member 227 drives the folding locking member 228 via the movable piece 229 to move to the unlocking position, allowing the first pivot base 222 and the mounting base 221 to rotate relative to each other, thereby further folding the child carrier 2400. Furthermore, in the process of driving the folding locking member 228 to move toward the unlocking position, the finger 2281 on the folding locking member 228 pushes the first lock releasing member 214.15 and 16, it can be seen from the above that after the first unlocking member 214 is pushed by the folding locking member 228, it rotates around the first axis 21211, thereby directly or indirectly driving the stopper member 213 to move to the unlocked position, releasing the lock between the first connecting base 211 and the second connecting base 212, and allowing the support device 2300 to be folded.

[0141] As the operating portion 2512 of the operating member 251 continues to be pulled upward in the vertical direction, the operating member 251 rotates the folding unlocking member 252 upward around the first pivot shaft 2201 via the second pivot shaft 2501. The support device 2300 of the child carrier 2000 is folded by the action of gravity, and during this process, the stopper member 213 is held in the unlocked position. At the same time, the first pivot base 222 and the second pivot base 223 of the child transporting device 2400 rotate downward around the first pivot shaft 2201 by the action of gravity, further folding the child carrier 2000.

[0142] 13, 17, and 18, when child carrier 2000 is folded into a predetermined position, folding unlock member 252 rotates to the third position, and pivot axis R3 defined by second pivot shaft 2501 is positioned approximately directly above pivot axis R2 defined by first pivot shaft 2201 (i.e., first plane S1 is approximately parallel to the vertical direction). Thereafter, vertically upward tensile force F is released, and operating member 251 is rotated toward second side wall 25232 of position limiting recess 2523, so that operating member 251 abuts against second side wall 25232 of position limiting recess 2523. This can reduce the volume of child carrier 2000 after folding (specifically, the vertical volume of child carrier 2000 after folding can be reduced). After the folding of the child carrier 2000 is completed, the folding lock member 228 is blocked by an end of the first internal gear 2224 of the mounting base 221 and is restricted to the unlocked position, and the stopper member 213 is blocked by an end of the second internal gear 2123 and is restricted to the unlocked position. In other words, when the child carrier 2000 is folded to a predetermined position, the support device 2300 can be switched to the unfolded state, and the child carrying device 2400 can also be switched to the unfolded state. Furthermore, after the folding of the child carrier 2000 is completed, the push member 227 is reset by moving along the first pivot shaft 2201 toward the folding unlock member 252 due to the acting force of the elastic reset member 2232, and the second engagement portion of the push member 227 engages with the first engagement portion of the folding unlock member 252.

[0143] The operation of unfolding child carrier 2000 will be briefly described below with reference to FIGS.

[0144] From the above, it can be seen that after the child carrier 2000 is folded to a predetermined position, the folding joint 2200 of the child carrying device 2400 and the connecting joint 2100 of the support device 2300 are both in an unlocked state, and both the support device 2300 and the child carrying device 2400 can be switched to an unfolded state.

[0145] First, when an external force is applied to the handle 231, the handle 231 moves the first connecting base 211 and rotates it relative to the second connecting base 212, switching the support device 2300 from the folded state to the unfolded state (see FIG. 12). Combining FIGS. 16 and 18, at this time, the child carrier 2400 is still in the folded state, and at least one finger 2281 of the folding lock member 228 abuts against the first unlocking member 214, indirectly restricting the position of the stopper member 213 to the unlocked position. Then, when the backrest pipe 242 is rotated upward, the backrest pipe 242 moves the second pivot base 223, and together they rotate relative to the first pivot base 222 and the mounting base 221. During this process, the push member 227 rotates together with the second pivot base 223, causing the first push member 227 and the abutment post 2291 of the movable piece 229 to shift from each other. Due to the concave-convex engagement between the second engagement portion of the push member 227 and the first engagement portion of the folding unlocking member 252, and the cooperative force of the elastic reset member 2232 on the push member 227, the push member 227 moves the folding unlocking member 252 so that the folding unlocking member 252 rotates together with the second pivot base 223.

[0146] When the backrest pipe 242 is subsequently rotated upward, the backrest pipe 242 moves the first pivot base 222 and the folding unlock member 252 via the second pivot base 223 so that both the first pivot base 222 and the folding unlock member 252 rotate relative to the mounting base 221. From the above, it can be seen that when the second pivot base 223 rotates until the first position limiting tooth groove 22241 and the second position limiting tooth groove 22141 are aligned, the first internal gear 2224 no longer blocks the position limiting tooth 22831, so that the folding lock member 228 is reset to the locked position by the acting force of the elastic reset member 226, and the stopper member 213 is also moved axially by the acting force of the elastic reset member 215 and reset to the locked position, thereby locking the support device 2300 in the unfolded state. Axial movement of the stopper member 213 pushes and moves the drive member 216 to reset, the drive member 216 pushes and rotates the first unlocking member 214 to reset, and the first unlocking member 214 rotates and resets the second unlocking member 217, thereby locking the child carrier 2300 in the deployed state.

[0147] In a child carrier and child transport device provided according to a second embodiment of the present application, the operating member is a rigid member and pivotally connected to the folding / unlocking member by a second pivot axis offset from the first pivot axis. Compared to when the second pivot axis and the first pivot axis are coaxially arranged, the offset second pivot axis of the present application increases the torque corresponding to the force applied by the user to the operating member, further reducing the force required for the unlocking operation. Furthermore, by pivotally connecting the rigid operating member to the folding / unlocking member, it is possible to avoid deformation during operation of the operating member, which could prevent the operating member from transmitting sufficient driving force to the folding joint. The rigid structure of the operating member allows the direction in which the operating member receives force to be appropriately controlled, allowing the operating member to transmit driving force to the folding joint more effectively. Furthermore, it is possible to avoid a situation in which both folding joints receive uneven force, preventing simultaneous unlocking, thereby achieving faster folding of the child carrier more efficiently and with less force.

[0148] Third Example Child carriers (e.g., strollers) generally have a folding function, which reduces the space they occupy and makes them easier to store and carry. However, with conventional child carriers, it is difficult to control the folding speed when folding, and the frame parts are subjected to strong impacts, making the stroller easily damaged.

[0149] In response to the above problem, a frame and a child carrier including the same are provided according to a third embodiment of the present invention, as shown in Figs. 23 to 28.

[0150] 23 , a third embodiment of the present invention provides a child carrier (e.g., stroller) 3000 including a frame 310. The frame 310 includes a first frame body 3100, a second frame body 3200, a third frame body 3700, an interlocking frame 316, and a lock joint 314. The first frame body 3100 is pivotally connected to the second frame body 3200, the lock joint 314 is connected between the first frame body 3100 and the third frame body 3700, the first frame body 3100 and the third frame body 3700 are pivotally connected by the lock joint 314, and the interlocking frame 316 is pivotally connected to the second frame body 3200 and the third frame body 3700. The lock joint 314 has a locked state and an unlocked state. When the lock joint 314 is in a locked state, the first frame body 3100 and the third frame body 3700 are locked to each other and cannot rotate relative to each other, and the frame 310 is in an unfolded state as shown in FIG. 23. When the lock joint 314 is in an unlocked state, the first frame body 3100 and the third frame body 3700 can rotate relative to each other, and the frame 310 can switch from the unfolded state to the folded state. In this embodiment, the pivotal connection positions of the first frame body 3100 and the second frame body 3200 are installed with the axes offset with respect to the lock joint 314. That is, the second frame body 3200 and the third frame body 3700 are pivotally connected to the first frame body 3100 at different positions on the first frame body 3100.

[0151] For ease of understanding, a coordinate system is set in the drawing. As shown in Fig. 23, the frame 310 is connected to a front wheel assembly 318a and a rear wheel assembly 318b, and when the frame 310 is placed on a horizontal plane, the front wheel assembly 318a is located in front of the rear wheel assembly 318b, i.e., the front wheel assembly 318a is located in the negative direction of the X axis relative to the rear wheel assembly 318b, the positive direction of the Z axis is parallel to the upward vertical direction, the connecting line between the positions of the two lock joints 314 is parallel to a direction including the Y axis, and the right lock joint 314 is located in the positive direction of the Y axis relative to the left lock joint 314.

[0152] 23, 26, and 27, in the process of switching the frame 310 from the unfolded state to the folded state, the first frame body 3100 and the second frame body 3200 approach each other, and the interlocking frame 316 also causes the third frame body 3700 and the second frame body 3200 to approach each other. More specifically, in the process of switching the frame 310 from the unfolded state to the folded state, with reference to the second frame body 3200, the first frame body 3100 rotates backward and downward toward the second frame body 3200, and the third frame body 3700 rotates backward toward the second frame body 3200. As shown in FIG. 27, when the frame 310 is in the folded state, the first frame body 3100 and the third frame body 3700 are located behind and in front of the second frame body 3200, respectively. In other embodiments, the rotation direction between the first frame body 3100, the second frame body 3200 and the third frame body 3700 may be other rotation directions, such as the first frame body 3100 rotating forward and downward toward the third frame body 3700.

[0153] It should be noted that the direction of mutual rotation between the first frame body 3100 and the second frame body 3200 differs depending on the reference point. For example, in this embodiment, when the frame 310 switches from the unfolded state to the folded state, the mutual rotation between the first frame body 3100 and the second frame body 3200 can be seen as the second frame body 3200 rotating relative to the first frame body 3100 along a first rotation direction A1, and can also be seen as the first frame body 3100 rotating relative to the second frame body 3200 along a second rotation direction A2. The first rotation direction A1 and the second rotation direction A2 are opposite directions. For example, when viewed from the perspective of FIG. 26, the first rotation direction A1 is counterclockwise in FIG. 26, and the second rotation direction A2 is clockwise in FIG. 26. For ease of understanding, the following description of the mutual rotation between the first frame body 3100 and the second frame body 3200 will be mainly based on the rotation of the second frame body 3200 relative to the first frame body 3100 as an example.

[0154] 24 to 26, the frame 310 further includes a rotating member 3300 and a buffer member 3400, the rotating member 3300 being pivotally connected to the first frame body 3100, i.e., the rotating member 3300 can rotate relative to the first frame body 3100, and the buffer member 3400 is connected to the rotating member 3300. The buffer member 3400 is used to provide the rotating member 3300 with a force that rotates the rotating member 3300 in a second rotation direction A2 relative to the first frame body 3100, the second rotation direction A2 being opposite to the first rotation direction A1. When the second frame body 3200 rotates relative to the first frame body 3100 in the first rotation direction A1, the frame 310 switches from the unfolded state to the folded state, and in the process of the second frame body 3200 rotating relative to the first frame body 3100 in the first rotation direction A1, the second frame body 3200 drives the rotation member 3300 to rotate the rotation member 3300 in the first rotation direction A1 relative to the first frame body 3100. In this embodiment, the rotation member 3300 has a pivot end 3310 pivotally connected to the first frame body 3100 and an engagement end 3320 that engages with the second frame body 3200, and the engagement end 3320 and the pivot end 3310 are located at opposite ends of the rotation member 3300. In this embodiment, the engagement end 3320 abuts and engages with the second frame body 3200, and the second frame body 3200 pushes the engagement end 3320 to drive the rotating member 3300 and rotate it along the first rotation direction A1 relative to the first frame body 3100.

[0155] It should be understood that when the second frame body 3200 rotates in the first rotation direction A1 relative to the first frame body 3100, the second frame body 3200 drives the rotating member 3300 to rotate in the first rotation direction A1 relative to the first frame body 3100, but the buffer member 3400 provides an acting force to the rotating member 3300 to rotate in the second rotation direction A2 relative to the first frame body 3100, so the buffer member 3400 exerts a damping effect on the rotation of the rotating member 3300 in the first rotation direction A1 relative to the first frame body 3100. Therefore, the resistance force when the rotating member 3300 rotates in the first rotation direction A1 relative to the first frame body 3100 increases, and as a result, the speed at which the second frame body 3200 rotates in the first rotation direction A1 relative to the first frame body 3100 slows down. This prevents the first frame body 3100 and the second frame body 3200 from colliding violently during the process of folding the frame 310, or prevents the first frame body 3100 from moving other parts and colliding with the ground or other structures.

[0156] 25 to 28, first frame body 3100 and second frame body 3200 form a first included angle α, and as frame 310 is folded, first included angle α gradually decreases, and rotation member 3300 is located in the included angle region of first included angle α (i.e., the region corresponding to first included angle α). More specifically, first frame body 3100 has first edge 3121 and second edge 3122, and first edge 3121 is installed back to back with second edge 3122, and first edge 3121 is located on the side of first frame body 3100 facing rotation member 3300. The second frame body 3200 has a third edge 3214 and a fourth edge 3215. The third edge 3214 is disposed back to back with the fourth edge 3215, and the third edge 3214 is located on the side of the second frame body 3200 facing the rotating member 3300. The first edge 3121 and the third edge 3214 form a first included angle α, and the angle of the first included angle α when the frame 310 is in the unfolded state is larger than the angle when the frame 310 is in the folded state. In other words, when the frame 310 is in the folded state, the first edge 3121 is closer to the third edge 3214 than the second edge 3122, and the third edge 3214 is closer to the first edge 3121 than the fourth edge 3215. The rotating member 300 is located in the region between the first edge 3121 and the third edge 3214. In the process of the second frame body 3200 rotating relative to the first frame body 3100 in the first rotation direction A1, the rotation member 3300 comes into contact with the third edge 3214 of the second frame body 3200.

[0157] 23 and 24, the first frame body 3100 has a first main frame body 3120 and a first connection base 3110 connected to each other, and the first main frame body 3120 and the first connection base 3110 are installed at an angle. The first edge 3121 and the second edge 3122 of the first frame body 3100 are the two edges of the first main frame body 3120. The second frame body 3200 has a second main frame body 3213 and a second connection base 3210 connected to each other, and the first connection base 3110 is pivotally connected to the second connection base 3210. 25 , when the frame 310 is in the unfolded state, the edge of the first connecting base 3110 facing the rotating member 3300 is closer to the engagement end 3320 of the rotating member 3300 than the edge of the second connecting base 3210 facing the rotating member 3300, corresponding to the position of the engagement end 3320 of the rotating member 3300, so that when the frame 310 is in the unfolded state, the rotating member 3300 abuts against the edge of the first connecting base 3110 facing the rotating member 3300. In other embodiments, the edge of the second connecting base 3210 facing the rotating member 3300 is closer to the engagement end 3320 of the rotating member 3300 than the edge of the first connecting base 3110 facing the rotating member 3300, corresponding to the position of the engagement end 3320 of the rotating member 3300. In this case, when the frame 310 is in the deployed state, the rotating member 3300 abuts against the edge of the second connecting base 3210 facing the rotating member 3300.

[0158] 24 to 28, in the process of the frame 10 switching from the unfolded state to the folded state, the edge of the second connecting base 3210 facing the rotating member 3300 pushes the rotating member 3300, causing it to rotate in the first rotation direction A1 relative to the first frame body 3100. More specifically, in this embodiment, the extension directions of the second main frame body 3213 and the second connecting base 3210 are approximately the same, and the second connecting base 3210 protrudes from the end of the second main frame body 3213. The third edge 3214 includes a first portion 3214a and a second portion 3214b, and the first portion 3214a of the third edge 3214 of the second frame body 3200 is provided on the second connection base 3210, the second portion 3214b of the third edge 3214 is provided on the second main frame body 3213, the first portion of the fourth edge 3215 of the second frame body 3200 is provided on the second main frame body 3213, and the second portion of the fourth edge 3215 is provided on the second connection base 3210. As the second frame body 3200 rotates relative to the first frame body 3100 in the first rotation direction A1, the engagement end 3320 of the rotating member 3300 gradually slides from the second connection base 3210 to the second main frame body 3213, and the rotating member 3300 first abuts against the edge of the second connection base 3210 facing the rotating member 3300 (i.e., the first part 3214a of the third edge 3214), and then abuts against the edge of the second main frame body 3213 facing the rotating member 3300 (i.e., the second part 3214b of the third edge 3214). Of course, in other embodiments, if the length of the second connection base 3210 protruding from the end of the second main frame body 3213 is sufficient, the rotating member 3300 can slide and abut only along the edge of the second connection base 3210 facing the rotating member 3300 (i.e., the first part 3214a of the third edge 3214), or if the extension length of the rotating member 3300 is long enough, the rotating member 3300 can slide and abut only along the edge of the second main frame body 3213 facing the rotating member 3300 (i.e., the second part 3214b of the third edge 3214).

[0159] 24, the first connection base 3110 has a first base body 3111 and a second base body 3112 that are spaced apart from each other. In this embodiment, the first base body 3111 and the second base body 3112 have the same shape and resemble a flat block-like structure, and the first base body 3111 and the second base body 3112 are spaced apart from each other in the Y-axis direction. The first connecting base 3110 further has a cavity 3114 and an opening 3115 that communicate with each other, the cavity 3114 is located between the first base body 3111 and the second base body 3112, at least a portion of the second connecting base 3210 is fitted in the cavity 3114, and the opening 3115 is located facing the rotating member 3300 and exposes the edge of the second connecting base 3210 that faces the rotating member 3300 (i.e., the first portion 3214a of the third edge 3214 is exposed). The first base body 3111 and the second base body 3112 both have side edges that face the rotating member 3300, and more specifically, the side edges of the first base body 3111 and the second base body 3112 that correspond to the positive direction of the X-axis face the rotating member 3300. 23 and 25 , when the frame 310 is in the unfolded state, the engagement end 3320 of the rotational member 3300 abuts against an edge of at least one of the first base body 3111 and the second base body 3112 that faces the rotational member 3300. As shown in FIGS. 26 and 27 , when the frame 310 switches from the unfolded state to the folded state, the edge of the second connecting base 3210 that faces the rotational member 3300 (i.e., the first portion 3214a of the third edge 3214) extends from the opening 3115 and pushes the rotational member 3300 to rotate it relative to the first frame body 3100 along the first rotational direction A1. Furthermore, as shown in Figures 24 and 26, the first connection base 3110 further includes a connection portion 3113 that connects the first base body 3111 and the second base body 3112, and forms a cavity 3114 so as to be surrounded by the connection portion 3113, the first base body 3111, and the second base body 3112.

[0160] It should be noted that in this embodiment, the connection portion 3113 is connected to the first main frame body 3120 (for example, by fasteners such as screws). In other embodiments, the first connection base 3110 may not have the connection portion 3113, and the first base body 3111 and the second base body 3112 are directly connected to the first main frame body 3120 by welding, adhesion, or other methods, and the first base body 3111, the second base body 3112, and the first edge 3121 of the first main frame body 3120 form a surrounding cavity 3114. In other embodiments, the first connection base 3110 may have only the first base body 3111 or the second base body 3112. In other embodiments, the first frame body 3100 may omit the first connection base 3110, and the second frame body 3200 may be directly pivotally attached to the first main frame body 3120.

[0161] It should be noted that in this embodiment, the second connection base 3210 and the second mainframe body 3213 may be separate structures that are attached to each other to achieve connection, for example, a portion of the second connection base 3210 is inserted into the second mainframe body 3213. In other embodiments, the second connection base 3210 and the second mainframe body 3213 may be an integral structure, which is not limited here.

[0162] 24, 25, and 26, there is a gap at the pivotal position between the first frame body 3100 and the second frame body 3200, and the rotating member 3300 covers the gap. Specifically, there is a gap between the second connection base 3210 and the first base body 3111, and there is also a gap between the second connection base 3210 and the second base body 3112. Therefore, by covering the gap, the rotating member 3300 prevents the user's fingers and other parts from reaching into the gap, thereby preventing injury to the user during the folding process of the frame 310 and reducing the risk of hands getting pinched. Specifically, the width of the rotating member 3300 (i.e., the dimension along the Y-axis) is greater than the distance between the first base body 3111 and the second base body 3112, and the rotating member 3300 covers at least a portion of the opening 3115.

[0163] 24 to 26, the frame 310 further includes a first pivot shaft 3500, and the first connection base 3110 and the second connection base 3210 are pivotally connected via the first pivot shaft 3500. More specifically, a first pivot hole 3116 is provided in the first connection base 3110 (the first base body 3111 and the second base body 3112 are both provided with the first pivot hole 3116), and the first pivot hole 3116 penetrates the first connection base 3110 along the thickness direction of the first connection base 3110, i.e., along a direction parallel to the Y-axis. A second pivot hole 3212 is provided in the second connection base 3210, and the second pivot hole 3212 is located near the center of the second connection base 3210 and penetrates the second connection base 3210 along the thickness direction of the second connection base 3210 (i.e., along a direction parallel to the Y-axis). The first pivot shaft 3500 penetrates the first pivot hole 3116 and the second pivot hole 3212 , allowing the second connection base 3210 to rotate relative to the first connection base 3110 .

[0164] Furthermore, the first connection base 3110 has a first portion 3110a between the connection position of the first connection base 3110 and the first mainframe body 3120 and the first pivot shaft 3500, and the first connection base 3110 further has a second portion 3110b between the first pivot shaft 3500 and the end of the first connection base 3110. To make it easier to understand the first portion 3110a and the second portion 3110b of the first connection base 3110, the first connection base 3110 is separated by a dotted line in FIGS. 23 and 24. However, in reality, there is no clear boundary between the two portions in the appearance of the integrally molded first connection base 3110. Of course, the position and type of the dotted line can be changed, and the shape and size of the first portion 3110a and the second portion 3110b are not limited by the dotted lines in FIGS. 23 and 24. When the frame 310 is in the unfolded state, the rotating member 3300 shields the area of ​​the opening 3115 corresponding to the first portion 3110a. The first portion 3110a of the first connection base 3110 is closer to the connection position between the first connection base 3110 and the first main frame body 3120 than the second portion 3110b of the first connection base 3110. During the folding process, the gap between the second connection base 3110 and the opening 3115 becomes larger, but the rotating member 3300 shields the area of ​​the opening 3115 corresponding to the first portion 3110a of the first connection base 3110, thereby more effectively reducing the risk of hands getting pinched. Of course, in other embodiments, the rotating member 3300 can be extended to cover the entire opening 3115.

[0165] 24 , the frame 310 further includes a second pivot shaft 3600, and the rotating member 3300 and the first frame body 3100 are pivotally connected by the second pivot shaft 3600. In this embodiment, the rotating member 3300 and the first connecting base 3110 are pivotally connected by the second pivot shaft 3600. A third pivot hole 3119 is provided on the side of the first connecting base 3110 corresponding to the positive direction of the X-axis, and a fourth pivot hole 3313 is provided on the rotating member 3300, and the second pivot shaft 3600 penetrates through the third pivot hole 3119 and the fourth pivot hole 3313. More specifically, a first protrusion 3117 and a second protrusion 3118 are provided on the first connecting base 3110, and a third protrusion 3311 and a fourth protrusion 3312 are provided on the rotating member 3300. 24, specifically, the first protrusion 3117 and the second protrusion 3118 are both provided at one end of the connecting portion 3113 in the positive direction of the X axis, and are spaced apart from each other in the Y axis direction. The third protrusion 3311 and the fourth protrusion 3312 are also spaced apart from each other in the Y axis direction, and are both provided at the pivot end 3310 of the rotating member 3300, i.e., the end of the rotating member 3300 located in the positive direction of the Z axis. The first protrusion 3117 and the second protrusion 3118 each have one third pivot hole 3119, and the third protrusion 3311 and the fourth protrusion 3312 each have one fourth pivot hole 3313. The first protruding portion 3117 and the second protruding portion 3118 are located between the third protruding portion 3311 and the fourth protruding portion 3312, and the second pivot shaft 3600 passes through the third protruding portion 3311, the first protruding portion 3117, the second protruding portion 3118, and the fourth protruding portion 3312, pivotally connecting the rotating member 3300 to the first connecting base 3110. In other embodiments, the rotating member 3300 can also be pivotally connected to the first mainframe body 3120, i.e., the pivot end 3310 of the rotating member 3300 can also be pivotally connected to the first mainframe body 3120, but this is not limited thereto.

[0166] In some embodiments, the buffer member 3400 is an elastic member. The elastic member may be a torsion spring, a spring, a rubber member, or the like. When the second connection base 3210 rotates relative to the first connection base 3110 in the first rotational direction A1, the rotational member 3300 abuts against the second frame body 3200 and rotates together with the second frame body 3200 relative to the first frame body 3100 in the first rotational direction A1. The elastic member is deformed under the force and generates a reset force. The reset force is applied to the rotational member 3300, causing the rotational member 3300 to always tend to rotate in the second rotational direction A2. In this way, when the frame 310 switches from the folded state to the unfolded state, the rotational member 3300 is driven by the elastic member to automatically rotate in the second rotational direction A2. This eliminates the need for a user to manually reset the rotational member 3300, improving ease of use.

[0167] Furthermore, the buffer member 3400 of this embodiment is a torsion spring 3410. In this embodiment, as shown in Figures 24 and 26, the torsion spring 3410 has two torsion arms 3411 and a main body 3412. One of the torsion arms 3411 is connected to the first frame body 3100 (for example, fixed to the connection portion 3113 of the first connection base 3110). The rotating member 3300 has an accommodating groove 3330 (see Figure 25), and the other torsion arm 3411 of the torsion spring 3410 is installed in the accommodating groove 3330 (i.e., the other torsion arm 3411 of the torsion spring 3410 is inserted into the accommodating groove 3330). In this way, the receiving groove 3330 effectively prevents the torsion arm 3411 from coming loose from the rotating member 3300 and improves the stability of the connection between the torsion spring 3410 and the rotating member 3300, thereby more stably applying a reset force to the rotating member 3300 and preventing reset failures. In addition, the first protrusion 3117 and the second protrusion 3118 are spaced apart, which not only leaves an attachment space for the body 3412 of the torsion spring 3410 but also restricts the position of the body 3412, thereby further improving the attachment stability of the torsion spring 3410 and preventing the torsion spring 3410 from loosening and falling off.

[0168] 23, 25, and 28, the frame 310 is mounted on a horizontal surface (not shown), and includes a hand frame 311, a front leg frame 312, a rear leg frame 313, a pusher 315, an interlocking frame 316, and a footrest 317. There are two hand frames 311, each installed at an incline relative to the horizontal surface, and there are two front leg frames 312, each installed at an incline relative to the horizontal surface, with the front leg frames 312 and hand frames 311 extending in roughly the same direction. The pusher 315 has a roughly U-shaped rod structure, and both ends are connected to the upper ends of the two hand frames 311. The lower ends of the two hand frames 311 are connected to the upper ends of the two front leg frames 312 via two locking joints 314, respectively. The lower ends of the two front leg frames 312 are connected to both ends of a footrest 317, and two front wheel assemblies 318a are connected to the bottom ends of the footrest 317. There are two rear leg frames 313, which are installed at an angle relative to the horizontal plane. The upper ends of the two rear leg frames 313 are pivotally connected to the two hand frames 311, respectively. Two rear wheel sets 318b are connected to the bottom ends of the two rear leg frames 313. When the frame 310 is in the unfolded state, the hand frames 311, the front leg frames 312, the footrest 317, and the pusher 315 are located approximately in the same plane and form a roughly rectangular structure. Of course, in other embodiments, the shape and number of the above components of the frame 310 can be changed according to actual needs, and are not limited herein.

[0169] In this embodiment, the first frame body 3100 is the hand frame 311 of the frame 310, the second frame body 3200 is the rear leg frame 313 of the frame 310, and the third frame body 3700 is the front leg frame 312 of the frame 310. The rotating member 3300 is located on the side of the rear leg frame 313 facing the push unit 315, i.e., the rotating member 3300 is located on the side of the rear leg frame 313 corresponding to the positive direction of the X-axis. The installation of the rotating member 3300 and the buffer member 3400 slows down the folding speed between the hand frame 311 and the rear leg frame 313, and prevents violent collisions between the hand frame 311 and the rear leg frame 313. Also, as shown in Figure 28, when the frame 310 is in the folded state, the push part 315 comes into contact with the support surface (e.g., the ground) to help the frame 310 maintain an upright position even after it is folded. In the present application, by slowing down the speed at which the second frame body 3200 rotates in the first rotation direction A1 relative to the first frame body 3100, the rotation speed at which the first frame body 3100 moves the push part 315 is also slowed down, thereby preventing the push part 315 from colliding violently with the support surface and damaging the frame 310.

[0170] In other embodiments, the first frame body 3100 and the second frame body 3200 may be other portions within the frame 310 that require deceleration or pinch prevention. For example, the frame 310 may further have an armrest (or tray), and the first frame body 3100 and the second frame body 3200 may be the nose landing gear frame 312 and the armrest (or tray) of the frame 310, respectively, and the armrest can be folded relative to the nose landing gear frame 312.

[0171] The buffer member of the frame damps the rotation of the rotating member in the first rotation direction relative to the first frame body, increasing the resistance force of the rotating member in the first rotation direction relative to the first frame body, thereby slowing down the speed at which the second frame body rotates in the first rotation direction relative to the first frame body. This prevents a violent collision between the first frame body and the second frame body during the folding process of the frame, or prevents the first frame body from moving other parts and causing them to collide with the ground or other structures, thereby reducing the risk of frame damage.

[0172] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but as long as there is no contradiction in the combination of these technical features, they should be considered within the scope of the present specification.

[0173] The above examples merely represent some embodiments of the present application, and although the description is specific and detailed, these examples should not be understood as limiting the scope of protection of the patent application. It should be noted that those skilled in the art may make some modifications and improvements without departing from the concept of the present application, and all of them fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application is based on the appended claims. [Explanation of symbols]

[0174] 1000 strollers 1100 Connection structure 1110 First Joint 1111 First disk section 1112 Shaft 1112b Shaft hole 1113 Guide groove 1114 First recess 1114a 1st bottom 1114b External surface 1120 Second Joint 1121 Second disk section 1122 Locking groove 1123 Second recess 1123a 2nd bottom 1123b Inner surface 1130 Connecting members 1131 Head 1132 Rod part 1140 Spacer member 1141 Inner surface 1141a arc shape 1142 Outer surface 1150 Locking member 1151 Locking part 1160 Unlocking Component 1161 Cosmetic surface 1162 Pressing part 1170 Reset member 1180 Reinforcement member 1200 Lower Handlebar 1300 upper handle 1400 Running mechanism 1500 front legs 1600 hind legs A axis direction 2000 Child Carrier 2100 Connection Joint 210 Chamber 2101 Pivot shaft 211 First Connection Base 21100 Center hole 2113 1st internal gear (internal gear) 21131 1st position limited tooth groove 212 Second connection base 212a 1st side 212b 2nd side 2120 Lock hole 21208 Through hole 2121 Locking stand 21210 Mounting recess 21211 1st axis 21212 2nd axis 2123 Second internal gear 21231 2nd position limited tooth groove 213 Stopper member 2131 Position-limited teeth 214 First lock release member 2141 First Push Section 2142 1st contact part 2143 First connection part 21431 First tooth structure 215 Elastic reset member 216 Driving member 2161 Third Push Section 2162 Third contact part 217 Second lock release member 2171 Second connection part 21711 Second tooth structure 2172 Second contact part 218 Fixed Frame 2181 Plate 2182 Side wall 21821 First mounting hole 21822 Second mounting hole 2200 Folding Joint 220 Chamber 2201 1st pivot shaft 221 Mounting base 22100 Center hole 2210 Locking groove 22101 Locking member 22102 Unlocking member 22103 Elastic reset member 22107 Through hole 22108 Through hole 222 First pivot base 22200 Center hole 229 Movable piece 2222 Abutting column 223 Second pivot base 22300 Center hole 22303 Through hole 22305 Arc groove 2232 Elastic reset member 226 Elastic reset member 227 Push member 22700 Center hole 227 Push Pillar 2272 Second convex part 228 Folding locking member 22800 Center hole 2281 Finger 22811 First Finger 22812 Second Finger 2300 Support device 231 Handle 232 Nose landing gear frame 233 Rear leg frame 2400 Child Carrier 241 Seat pipe 242 Backrest pipe 2500 Operation Assembly 2501 2nd pivot shaft 251 Operating member 2510 Pivot hole 252 Folding unlocking member 2520 Pivot hole 2521 First convex part 2522 Main body 2523 Position-limited recess 25231 First side wall 25232 Second side wall 2525 Arc-shaped convexity 3000 Child Carrier 310 frames 311 Hand Frame 312 Nose landing gear frame 313 Rear leg frame 314 Lock Joint 315 Hand push section 316 Interlocking Frame 317 Footrest 318a Front Wheel Assembly 318b Rear Wheel Assembly 3100 First frame body 3110 1st connection base 3110a First portion of first connection base 3110b Second part of first connection base 3111 First base body 3112 Second base body 3113 Connection 3114 Cavity 3115 Aperture 3116 1st pivot hole 3117 1st convex part 3118 Second convex part 3119 3rd pivot hole 3120 First main frame body 3121 First Edge 3122 Second Edge 3200 Second frame body 3210 Second Connection Base 3212 2nd pivot hole 3213 Second main frame body 3214 Third Edge 3214a First part of the third edge 3214b Second part of the third edge 3215 4th Edge 3300 Rotating parts 3310 Pivot end 3311 Third convex part 3312 4th convex part 3313 4th pivot hole 3320 Engagement end 3330 Storage groove 3400 Cushioning material 3410 Torsion spring 3411 Twisting Arm 3412 Main unit 3500 1st pivot shaft 3600 2nd pivot shaft 3700 Third frame body

Claims

1. A connection structure, a first joint and a second joint that rotate relative to each other about an axial direction; a connecting member that penetrates the second joint along the axial direction and is inserted into the first joint and is torsionally connected to the first joint, thereby restricting separation of the first joint and the second joint along a direction parallel to the axial direction; Including, A connection structure, wherein the connection member is spaced apart from the second joint.

2. The connection structure according to claim 1 , wherein the first joint is located between the connection member and the second joint in a radial direction perpendicular to the axial direction, and separates the connection member and the second joint along the radial direction.

3. 3. The connection structure according to claim 2, wherein the first joint includes a shaft portion that penetrates the second joint along a direction parallel to the axial direction, and the shaft portion is located between the connecting member and the second joint in the radial direction.

4. 4. The connection structure according to claim 3, wherein the connecting member has a head portion and a rod portion extending from the head portion along the axial direction, the rod portion is inserted into the shaft portion along the axial direction and is threadedly connected to the shaft portion, the head portion is located outside the shaft portion in the axial direction, and the second joint is located between the head portion and the first joint in a direction parallel to the axial direction.

5. 4. The connection structure according to claim 3, further comprising a spacer member, the connection member having a head portion and a rod portion extending from the head portion along the axial direction, the rod portion being inserted into the shaft portion along the axial direction and threadably connected to the shaft portion, the head portion being positioned outside the shaft portion in the axial direction, the spacer member being positioned between the head portion and the second joint in a direction parallel to the axial direction, thereby separating the connection member and the second joint along a direction parallel to the axial direction, and the spacer member not rotating around the axial direction relative to the connection member.

6. The connection structure according to claim 5 , wherein the spacer member is fitted on the outside of the shaft portion along a direction parallel to the axial direction, and the spacer member does not rotate around the axial direction relative to the shaft portion.

7. 7. The connection structure of claim 6, wherein the inner circumferential surface of the spacer member and the outer surface of the shaft portion are arranged adjacent to each other along the radial direction, and a cross section of the inner circumferential surface of the spacer member taken perpendicular to the axial direction and a cross section of the outer surface of the shaft portion taken perpendicular to the axial direction have corresponding shapes, and both are non-circular.

8. The connection structure according to claim 5 , wherein the head portion, the spacer member, the second joint, and the first joint are in contact with each other in a direction parallel to the axial direction.

9. 6. The connection structure of claim 5, wherein the second joint has a second recess formed in a recess away from the head portion and in a direction parallel to the axial direction, the spacer member is accommodated in the second recess in a direction parallel to the axial direction, the second recess includes a second bottom surface, and the spacer member is positioned between the head portion and the second bottom surface in a direction parallel to the axial direction.

10. The connection structure according to claim 9 , wherein the second recess includes an inner surface, and the outer peripheral surface of the spacer member and the inner surface are adjacent to each other along the radial direction and spaced apart from each other.

11. The connection structure according to claim 5 , wherein the spacer member is located between the head portion and the shaft portion in a direction parallel to the axial direction and abuts against the head portion and the shaft portion, respectively.

12. 6. The connection structure of claim 5, wherein a first recess is recessed into the end of the shaft portion closer to the head portion, facing away from the head portion and along a direction parallel to the axial direction, the spacer member is accommodated in the first recess along a direction parallel to the axial direction, the first recess includes a first bottom surface, and the spacer member is positioned between the head portion and the first bottom surface in the direction parallel to the axial direction.

13. 13. The connection structure of claim 12, wherein the first recess includes an outer surface, the inner circumferential surface and the outer surface of the spacer member are adjacent along the radial direction, and the inner circumferential surface and the outer surface of the spacer member have corresponding shapes in a cross section cut perpendicular to the axial direction, and both are non-circular.

14. the connecting structure further includes a spacer member, the spacer member being positioned between the connecting member and the second joint in a direction parallel to the axial direction, thereby separating the connecting member and the second joint along the direction parallel to the axial direction, and the spacer member not rotating around the axial direction relative to the connecting member; The connection structure according to claim 1 or 2.

15. 15. The connection structure of claim 14, wherein the spacer member is fitted on the outside of the first joint along a direction parallel to the axial direction, and the spacer member does not rotate around the axial direction relative to the first joint.

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