Linkage device and children's product

Abstract

A linkage device (100), comprising two fork-shaped assemblies (10); each fork-shaped assembly (10) comprises a first link rod (11) and a second link rod (12) which are arranged to cross each other, the first link rod (11) and the second link rod (12) being rotatably connected at an intersection by means of a connection shaft (13); at least one of the first link rod (11) and the second link rod (12) is provided with a sliding groove (14), and the connection shaft (13) and the sliding groove (14) are slidingly arranged relative to each other, such that the connection shaft (13) can slide under the guidance of the sliding groove (14); the two first link rods (11) of the two fork-shaped assemblies (10) are movably connected, and the two second link rods (12) of the two fork-shaped assemblies are movably connected. The device can shorten the relative movement stroke between two free ends on the same side of each fork-shaped assembly, reduce the space required for installation, reduce the arrangement of a sliding sleeve assembly and a locking assembly on a frame, thus improving the smoothness of unfolding and folding the frame.

Description

Connecting rod device and child product

[0001] The present disclosure claims priority to Chinese patent application No. CN2024108469213 filed on June 27, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of child products, in particular to a connecting rod device and a child product. BACKGROUND

[0003] The child stroller is generally foldable, and after folding, the height of the frame is reduced, the front and back are folded, the left and right are folded, and the overall volume is reduced, facilitating storage and transportation.

[0004] To realize the folding function of the child stroller, a cross brace structure is often used in the frame. The cross brace structure includes a first rod member and a second rod member that intersect each other and are pivotally connected at the intersection. When the frame is folded, the cross brace structure has a folded state; when the frame is unfolded, the cross brace structure has an open state. However, due to the cross brace structure, the longitudinal height of the first rod member and the second rod member changes when the cross brace structure is opened or folded in the transverse direction, and the relative movement stroke between the free ends of the first rod member and the free ends of the second rod member on the same side is large, which results in a large installation space required for the cross brace, making it inconvenient to install on the frame. In addition, in one solution in the prior art, both ends of the cross brace structure need to be slidingly installed on the frame, which requires a special sliding sleeve assembly, locking assembly, etc. to be provided between the cross brace structure and the frame, resulting in a complex structure of the entire frame, making installation inconvenient, and multiple sliding sleeve assemblies may also interfere with the folding and unfolding process of other rod members of the frame, affecting the smoothness of the opening and folding of the frame. In some other solutions, an additional rod member is added to connect the relevant components of the cross brace structure, the additional rod member, and the frame to form a four-bar linkage structure, which is complex.

[0005] Therefore, there is an urgent need for a connecting rod device and a child product to solve the above technical problems. SUMMARY

[0006] Based on the above, the purpose of the present disclosure is to provide a connecting rod device and a child product, which is simple in structure, convenient to install, reduces the use of sliding sleeve assemblies and locking assemblies, and does not affect the smoothness of the opening and folding of the frame.

[0007] To achieve the above purpose, the present disclosure adopts the following technical solutions:

[0008] The present disclosure provides a linkage device, comprising two groups of fork assemblies, each group of the fork assemblies comprising a first linkage and a second linkage rotatably connected around a connecting shaft, at least one of the first linkage and the second linkage being provided with a sliding groove, and the connecting shaft being slidably arranged opposite to the sliding groove; two first linkages of the two groups of the fork assemblies being movably connected, and two second linkages of the two groups of the fork assemblies being movably connected.

[0009] In some possible embodiments, the first linkage has a first joint end and a first free end arranged oppositely, and the second linkage has a second joint end and a second free end arranged oppositely; the linkage device has an unfolded state and a folded state, and when the unfolded state is converted into the folded state, the first free ends of the two first linkages move towards each other along a first direction; the first free ends and the second free ends in at least one group of the fork assemblies are kept at a constant distance in a second direction perpendicular to the first direction.

[0010] In some possible embodiments, the two first joint ends of the two first linkages are rotatably connected, and the second joint ends of the two second linkages are rotatably connected.

[0011] Or the linkage device further has an intermediate fork assembly, the intermediate fork assembly comprising a first intermediate linkage and a second intermediate linkage rotatably connected, one of the two first joint ends of the two first linkages being rotatably connected to the first intermediate linkage, and the other being rotatably connected to the second intermediate linkage; one of the two second joint ends of the two second linkages being rotatably connected to the second intermediate linkage, and the other being rotatably connected to the first intermediate linkage.

[0012] In some possible embodiments, the two first linkages are symmetrically arranged, and the two second linkages are symmetrically arranged.

[0013] The two first free ends of the two first linkages are arranged along a first direction, and the two second free ends of the two second linkages are arranged along the first direction; when the two first free ends move towards each other, the two second free ends also move towards each other, and the movement of the two first free ends towards each other is synchronous with the movement of the two second free ends towards each other.

[0014] In some possible embodiments, when the linkage device is unfolded to an unfolded position, the connecting shaft slides to a first inner wall of the sliding groove and abuts against the first inner wall to limit the movement stroke of the connecting shaft, at which time the first linkage and the second linkage are locked in movement.

[0015] When the connecting rod device is folded to the folded position, the connecting shaft slides to the second inner wall of the sliding groove and abuts against the second inner wall to limit the movement stroke of the connecting shaft.

[0016] The sliding groove is arc-shaped, and the arc-shaped trajectory of the intersection of the first connecting rod and the second connecting rod on the second connecting rod is formed during lateral unfolding or folding of the connecting rod device.

[0017] In some possible embodiments, the connecting rod device further comprises a first fixing member rotatably mounted to the first free end of the first connecting rod along a first rotation axis and a second fixing member rotatably mounted to the second free end of the second connecting rod along a second rotation axis.

[0018] At least one of the first fixing member and the second fixing member is provided with a fixing member rotation axis extending in a direction perpendicular to the first rotation axis or in a direction perpendicular to the second rotation axis.

[0019] In some possible embodiments, the first fixing member is provided with a mounting hole, and a through direction of the mounting hole is perpendicular to the first rotation axis.

[0020] The fixing member rotation axis of the first fixing member extends in a direction of a central axis of the mounting hole.

[0021] The present disclosure further provides a child product, comprising two side supports that are folded towards each other or unfolded away from each other, and a connecting rod device arranged between the two side supports, wherein the connecting rod device is any one of the connecting rod devices described above.

[0022] In some possible embodiments, the child product is a child stroller, the side supports comprise a front support, a rear support, a push rod, a side handle, and a linkage mechanism, the front support and the rear support are rotatably connected, the side handle is rotatably connected to the rear support, and the push rod is rotatably connected to the side handle.

[0023] The linkage mechanism comprises a linkage rod having two ends rotatably connected to the push rod and the rear support, respectively, and the linkage rod is connected to the front support through a linkage assembly; when the child stroller is folded, the linkage rod drives the front support and the push rod to fold towards the rear support.

[0024] The first connecting rod has oppositely arranged first joint ends and a first free end, and the second connecting rod has oppositely arranged second joint ends and a second free end; the connecting rod device is arranged between a pair of linkage rods, the first free end of the first connecting rod is rotatably connected to the linkage rod, and the second free end of the second connecting rod is rotatably connected to the linkage rod.

[0025] In some possible implementation manners, the linkage device further has a first fixing member rotatably mounted to the first free end of the first linkage along a first rotation axis, the first fixing member comprising a first fixing plate and a second fixing plate arranged vertically, the first linkage being rotatably mounted on the first fixing plate, and the second fixing plate being rotatably mounted on the linkage rod.

[0026] In some possible implementation manners, the linkage device further has a second fixing member rotatably mounted to the second free end of the second linkage along a second rotation axis, the second fixing member comprising a third fixing plate and a fourth fixing plate arranged vertically, the second linkage being rotatably mounted on the third fixing plate, and the fourth fixing plate being rotatably mounted on the linkage rod.

[0027] In some possible implementation manners, the child vehicle further has a seat frame, the seat frame comprising a seat rod and a sliding sleeve in sliding cooperation with the seat rod, the seat rod being rotatably mounted on the linkage rod through a seat rod rotation axis, and the sliding sleeve being rotatably mounted on the side armrest.

[0028] The second fixing plate is arranged rotatably relative to the seat rod rotation axis.

[0029] The present disclosure has the following beneficial effects:

[0030] The linkage device provided by the present disclosure comprises two groups of fork-shaped assemblies, each group of fork-shaped assemblies comprising a first linkage and a second linkage rotatably connected around a connecting axis, and at least one of the first linkage and the second linkage is provided with a sliding groove, and the connecting axis can slide in the sliding groove in the process of relative rotation. In this way, the distance between the two free ends of each group of fork-shaped assemblies in the height direction can be at least partially converted into the sliding of the connecting axis in the sliding groove in the process of unfolding or folding, so as to shorten the relative movement stroke between the two free ends on the same side of the fork-shaped assembly, reduce the required installation space, and facilitate the installation of the linkage device on the vehicle frame. In addition, the present disclosure can also fixedly install at least one free end of the linkage device on the vehicle frame, and the free end does not need to slide relative to the vehicle frame in the process of unfolding and folding of the vehicle frame, thereby reducing the setting of the sliding sleeve assembly and the locking assembly, simplifying the structure of the vehicle frame, and without affecting the smoothness of the opening and folding of the vehicle frame, the installation is convenient, and the cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0031] FIG. 1 is a structural schematic diagram of a first linkage device in an unfolded state according to an embodiment of the present disclosure;

[0032] FIG. 2 is a structural schematic diagram of the first linkage device in the process of unfolding or folding according to an embodiment of the present disclosure;

[0033] FIG. 3 is a structural schematic diagram of the first linkage device in a folded state according to an embodiment of the present disclosure;

[0034] Fig. 4 is a structural schematic diagram of a second connecting rod device in an unfolded state according to an embodiment of the present disclosure;

[0035] Fig. 5 is a structural schematic diagram of a third connecting rod device in an unfolded state according to an embodiment of the present disclosure;

[0036] Fig. 6 is a structural schematic diagram of a second connecting rod according to an embodiment of the present disclosure;

[0037] Fig. 7 is a structural schematic diagram of a first angle of a stroller according to an embodiment of the present disclosure;

[0038] Fig. 8 is a partial structural schematic diagram of the stroller in Fig. 7;

[0039] Fig. 9 is a structural schematic diagram of a second angle of a stroller according to an embodiment of the present disclosure;

[0040] Fig. 10 is a partial structural schematic diagram of the stroller in Fig. 9.

[0041] In the drawings:

[0042] 100, connecting rod device; 10, fork assembly; 11, first connecting rod; 111, first joint end; 112, first free end; 12, second connecting rod; 121, second joint end; 122, second free end; 13, connecting shaft; 14, sliding groove; 141, first inner wall; 142, second inner wall; 15, first fixing member; 151, first rotating shaft; 16, second fixing member; 161, second rotating shaft; 20, intermediate fork assembly; 21, first intermediate connecting rod; 22, second intermediate connecting rod;

[0043] 200, side support; 201, front support; 202, rear support; 203, push rod; 204, side armrest; 205, linkage rod; 206, seat rod. DETAILED DESCRIPTION

[0044] The present disclosure will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are intended to be merely illustrative of the present disclosure and not in limitation thereof. It should also be noted that, for the sake of brevity, only portions of the structures related to the present disclosure are shown in the drawings.

[0045] In the description of the present disclosure, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed", "movably connected" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. The term "movably connected" means that the relative position of the whole or the nearby part of the two can change, for example, sliding connection, or sliding and rotating connection, or rotating connection. The term "fixed connection" means that the relative position of the whole of the two does not change, for example, detachable connection through bolt assembly, or integral. For those skilled in the art, the specific meaning of the above terms in the present disclosure can be understood according to the specific circumstances.

[0046] In the present disclosure, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher than the second feature in horizontal height. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower than the second feature in horizontal height.

[0047] In the description of the present embodiment, the terms "up", "down", "left", "right", and other orientation or position relationships are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present disclosure. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0048] The present embodiment provides a connecting rod device which can be used in the frame of a stroller to solve the problem that the existing cross brace structure has a complex connection structure between both ends and the frame, resulting in a complex overall frame structure, inconvenient installation, and affecting the smoothness of opening and folding of the frame.

[0049] As shown in FIGS. 1-6, the connecting rod device 100 provided by the embodiment includes two groups of fork assemblies 10, each of which includes a first connecting rod 11 and a second connecting rod 12 arranged in cross with each other, the first connecting rod 11 and the second connecting rod 12 are rotationally connected at the cross through a connecting shaft 13, and at least one of the first connecting rod 11 and the second connecting rod 12 is provided with a sliding groove 14, the connecting shaft 13 is arranged in sliding relationship with the sliding groove 14, so that the connecting shaft 13 can slide under the guidance of the sliding groove 14. In other words, in the embodiment, the first connecting rod 11 and the second connecting rod 12 are rotationally and slidingly connected through the cooperation of the connecting shaft 13 and the sliding groove 14. The two first connecting rods 11 of the two groups of fork assemblies 10 are movably connected, and the two second connecting rods 12 of the two groups of fork assemblies are movably connected. In the embodiment, the two first connecting rods 11 are rotationally connected, and the two second connecting rods 12 are also rotationally connected. In this way, the distance between the two free ends of each group of fork assemblies 10 in the height direction can be at least partially converted into the sliding of the connecting shaft 13 in the sliding groove 14 during the unfolding or folding of the connecting rod device 100, so that the relative movement stroke between the two free ends on the same side of the fork assembly 10 can be shortened or even eliminated, the required installation space is reduced, and the installation of the connecting rod device 100 on the frame is facilitated; and the embodiment can also fix the position of at least one free end of the connecting rod device 100 on the frame, and the free end does not need to slide relative to the frame during the unfolding and folding of the frame, so that the sliding sleeve assembly and the locking assembly are reduced, the structure of the frame is simplified, and the smoothness of the opening and folding of the frame is not affected, the installation is convenient, and the cost is low. It should be noted that in the embodiment, the "fixedly installed on the frame" means that the installation position of the corresponding connecting rod on the frame is fixed and cannot move, for example, the connecting rod can be fixed on the frame through fasteners, or rotationally connected to the frame through a pin shaft, but not slidingly arranged on the frame.

[0050] Further, the first connecting rod 11 has a first joint end 111 and a first free end 112 oppositely arranged, and the second connecting rod 12 has a second joint end 121 and a second free end 122 oppositely arranged. The connecting rod device has an unfolded state and a folded state. In the embodiment, as shown in FIGS. 1-3, when the connecting rod device is converted from the unfolded state to the folded state, the first free ends 112 of the two first connecting rods 11 move towards each other along a first direction, and the first free ends 112 and the second free ends 122 of the at least one set of fork assemblies 10 remain unchanged in distance along a second direction perpendicular to the first direction. It should be noted that in the embodiment, the first direction refers to the lateral direction in FIG. 1, and the second direction refers to the longitudinal direction in FIG. 1. The above arrangement enables the change in longitudinal height (i.e., the change in distance between the first free ends 112 and the second free ends 122 of the fork assemblies 10 along the second direction) of the at least one set of first connecting rods 11 and second connecting rods 12 due to relative rotation during lateral unfolding or folding of the connecting rod device 100 to be entirely converted into sliding of the connecting shaft 13 in the sliding groove 14, so that the first free ends 112 and the second free ends 122 of the at least one set of fork assemblies 10 can be fixedly mounted on the frame, and the first free ends 112 and the second free ends 122 do not need to slide relative to the frame during unfolding and folding of the frame, thereby reducing the need for sliding sleeve assemblies and locking assemblies, simplifying the structure of the frame, and not affecting the smoothness of unfolding and folding of the frame, which is convenient to install and low in cost.

[0051] Optionally, in the connecting rod device 100, the two first connecting rods 11 are symmetrically arranged, and the two second connecting rods 12 are symmetrically arranged; and the two first free ends 112 of the two first connecting rods 11 are arranged along the first direction, and the two second free ends 122 of the two second connecting rods 12 are arranged along the first direction, so that when the two first free ends 112 move towards each other, the two second free ends 122 also move towards each other, and the movement of the two first free ends 112 towards each other is synchronized with the movement of the two second free ends 122 towards each other. The above arrangement is reasonable in structure and compact in arrangement, which ensures synchronous movement of the components on both sides of the connecting rod device 100 and improves the stability and balance of the connecting rod device 100.

[0052] As shown in FIG. 1-3, in some embodiments, the two sets of fork assemblies 10 can be directly connected in rotation. Specifically, the two first joint ends 111 of the two first connecting rods 11 are connected in rotation, and the second joint ends 121 of the two second connecting rods 12 are connected in rotation. Alternatively, the two first connecting rods 11 can be connected in rotation by rivets, and the two second connecting rods 12 can also be connected in rotation by rivets. Further, in the two sets of fork assemblies 10, the first connecting rod 11 of one set is located at the front side of the second connecting rod 12, and the first connecting rod 11 of the other set is located at the rear side of the second connecting rod 12, that is, the two first connecting rods 11 are arranged in front and back, and the two second connecting rods 12 are arranged in front and back. In this way, the connection is more stable, the structural strength is higher, and the support effect and service life of the connecting rod device 100 are increased.

[0053] As shown in FIG. 4 and FIG. 5, in other embodiments, the two sets of fork assemblies 10 can also be indirectly connected through at least one set of intermediate fork assemblies 20. Specifically, the intermediate fork assembly 20 includes a first intermediate connecting rod 21 and a second intermediate connecting rod 22 connected in rotation, one of the two first joint ends 111 of the two first connecting rods 11 is connected in rotation with the first intermediate connecting rod 21, and the other is connected in rotation with the second intermediate connecting rod 22; one of the two second joint ends 121 of the two second connecting rods 12 is connected in rotation with the second intermediate connecting rod 22, and the other is connected in rotation with the first intermediate connecting rod 21. It should be noted that the number of intermediate fork assemblies 20 can be one set, two sets or multiple sets, and the first intermediate connecting rod 21 and the second intermediate connecting rod 22 in each set of intermediate fork assemblies 20 can be connected in rotation only, or can be connected in rotation and can also slide relative to each other, and the present embodiment does not limit this.

[0054] Alternatively, the sliding groove 14 of the present embodiment is provided on the second connecting rod 12, one end of the connecting shaft 13 is connected with the first connecting rod 11, and the other end is movably clamped in the sliding groove 14. Specifically, the connecting shaft 13 can be a rivet, a pin, a bolt or the like penetrating the first connecting rod 11 and the second connecting rod 12; or one end of the connecting shaft 13 can be fixed to the first connecting rod 11, and the other end can be clamped to the outside of the sliding groove 14 through a gasket or the like structure. In this way, the structure is simple, the installation is convenient, and the use is reliable. Of course, in other embodiments, the sliding groove 14 can be provided only on the first connecting rod 11, or the sliding grooves 14 are provided on the first connecting rod 11 and the second connecting rod 12 respectively, and the sliding of the connecting shaft 13 in the sliding groove 14 can also be realized, and the relative movement between the first connecting rod 11 and the second connecting rod 12 can also be realized.

[0055] The prior art stroller capable of folding left and right has no complete rigid connecting rod between the left and right side supports, and the frame rigidity is poor. In the process of pushing and using, the frame is easily shaken and jolted obviously under the gravity load of the child sitting on it, and the lower support of the seat has a tendency to open to both sides, reducing the stability of the frame and shortening the service life.

[0056] To solve the above problems, the connecting rod device 100 provided in the embodiment can also realize mutual locking of the first connecting rod 11 and the second connecting rod 12. Specifically, as shown in FIG. 6, in the embodiment, the sliding groove 14 has a first inner wall 141 and a second inner wall 142. When the connecting rod device 100 is unfolded to the unfolded position, the connecting shaft 13 slides to the first inner wall 141 of the sliding groove 14 and abuts against the first inner wall 141 to limit the movement stroke of the connecting shaft 13, at which time the first connecting rod 11 and the second connecting rod 12 are locked in movement; when the connecting rod device is folded to the folded position, the connecting shaft 13 slides to the second inner wall 142 of the sliding groove 14 and abuts against the second inner wall 142 to limit the movement stroke of the connecting shaft 13. After the connecting rod device 100 is installed between the left and right side supports of the frame, since the connecting shaft 13 and the sliding groove 14 are arranged in each fork-shaped assembly 10, when the connecting rod device 100 is unfolded laterally to the unfolded position, each connecting shaft 13 slides to abut against the first inner wall 141 of the corresponding sliding groove 14, so that each first connecting rod 11 and the corresponding second connecting rod 12 are locked in movement and cannot continue to open to both sides, thereby providing the left and right sides of the frame with an inward pre-tightening force through the connecting rod device 100, effectively preventing the supports from opening to both sides, significantly enhancing the rigidity of the frame in the unfolded state, reducing the shaking of the frame when the child is sitting and pushing, and improving the stability and service life of the frame. Further, the sliding groove 14 is arc-shaped, and the arc shape is the trajectory of the intersection of the first connecting rod 11 and the second connecting rod 12 on the second connecting rod 12 in the process of unfolding or folding the connecting rod device 100 laterally. Such arrangement enables the arc-shaped groove to also guide the movement of the connecting shaft 13, making the operation of the connecting shaft 13 smoother, avoiding shaking of the connecting shaft 13 due to the sliding groove 14 being too large, or causing the connecting shaft 13 to run jammed due to unreasonable arrangement of the sliding groove 14.

[0057] In this embodiment, referring to FIGS. 1-3, the connecting rod device 100 further has a first fixing member 15 and a second fixing member 16, the first fixing member 15 is rotatably installed on the first free end 112 of the first connecting rod 11 along a first rotation axis 151, and the second fixing member 16 is rotatably installed on the second free end 122 of the second connecting rod 12 along a second rotation axis 161, so as to realize the connection between the connecting rod device 100 and the frame structure. In this embodiment, the first fixing member 15 and the second fixing member 16 are respectively fixedly connected or rotatably connected with the frame structure through clamping or / and rivets, bolts and the like. When the connecting rod device 100 is unfolded or folded laterally, the distance between the first fixing member 15 and the second fixing member 16 in the second direction remains unchanged, that is, the positions of the first fixing member 15 and the second fixing member 16 can remain unchanged when the frame is unfolded or folded, and the change in the longitudinal height of the first connecting rod 11 and the second connecting rod 12 due to rotation can be converted into the sliding between the connecting shaft 13 and the sliding groove 14, thereby avoiding the sliding assembly arranged between the connecting rod device 100 and the frame, and there is no need to arrange a rotation axis parallel to the first rotation axis 151 between the first fixing member 15 or the second fixing member 16 and the frame for rotatable connection. Even if the first fixing member 15 or the second fixing member 16 is rotatably connected with the frame by arranging a rotation axis parallel to the first rotation axis 151 due to other needs, since the relative movement stroke between the same side two free ends of the connecting rod device 100 can be significantly shortened by the arrangement of the present disclosure, the length of the first fixing member 15 or the second fixing member 16 can be very short, and the two components can be very small, so that the whole vehicle body structure is more compact. Exemplarily, the first fixing member 15 of the present embodiment can be rotatably connected with the end of the first connecting rod 11 through a rivet; and the second fixing member 16 can be rotatably connected with the end of the second connecting rod 12 through a rivet.

[0058] Further, the first fixing member 15 is provided with a fixing member rotation axis extending in a direction perpendicular to the first rotation axis 151, so as to realize the relative rotation between the first fixing member 15 and the frame, and facilitate the unfolding and folding of the frame; and / or the second fixing member 16 is provided with a fixing member rotation axis extending in a direction perpendicular to the second rotation axis 161, so as to realize the relative rotation between the second fixing member 16 and the frame, and facilitate the unfolding and folding of the frame. Specifically, the first fixing member 15 is provided with a mounting hole, the through direction of the mounting hole is perpendicular to the first rotation axis 151, and the fixing member rotation axis of the first fixing member 15 extends in the direction of the center axis of the mounting hole. In this way, the first fixing member 15 can be rotatably installed on the rod member of the frame through the mounting hole, and the structure is simple and the installation is convenient.

[0059] The embodiment also provides a child product, which comprises two side supports 200 that are folded by moving towards each other or unfolded by moving away from each other, and a linkage device 100 as described above, which is arranged between the two side supports 200. The child product can be a baby carriage, a child carriage, a stroller or the like. Specifically, the embodiment is described by taking the child carriage as an example.

[0060] Referring to FIGS. 7-10, the child carriage of the embodiment comprises two foldable side supports 200 and a linkage device 100 arranged between the two side supports 200. The side support 200 comprises a front support 201, a rear support 202, a push rod 203, a side handrail 204 and a linkage mechanism. The front support 201 and the rear support 202 are rotationally connected, the side handrail 204 is rotationally connected with the rear support 202, and the push rod 203 is rotationally connected with the side handrail 204. The linkage mechanism has a linkage rod 205, both ends of the linkage rod 205 are rotationally connected with the push rod 203 and the rear support 202 respectively, and the linkage rod 205 is connected with the front support 201 through a linkage assembly. When the child carriage is folded, the linkage rod 205 drives the front support 201 and the push rod 203 to move towards the rear support 202. In the embodiment, the linkage device 100 is arranged between a pair of linkage rods 205, the first free end 112 of the first linkage rod 11 is rotationally connected with the linkage rod 205, and the second free end 122 of the second linkage rod 12 is rotationally connected with the linkage rod 205. The embodiment realizes the lateral support of the carriage frame through the linkage device 100, thereby improving the rigidity of the carriage frame. In addition, the embodiment shortens the relative movement stroke between the two free ends of the linkage device 100 on the same side, thereby reducing the required installation space and facilitating the installation of the linkage device 100 on the carriage frame. At the same time, since the linkage device 100 can be fixedly connected with the side support 200, the arrangement of the sliding sleeve assembly and the locking assembly is reduced, the structure of the carriage frame is simplified, and the smoothness of the unfolding and folding of the carriage frame is improved. In addition, when the two side supports 200 are unfolded in place, the connecting shaft 13 can slide to abut against the first inner wall 141 of the sliding groove 14, so that the first linkage rod 11 and the second linkage rod 12 are locked and cannot continue to open to the sides. Therefore, the linkage device 100 provides an inward pre-tightening force to the two side supports 200, effectively avoids the two side supports 200 from being opened to the sides, significantly enhances the rigidity of the carriage frame in the unfolded state, reduces the shaking of the carriage frame when the child is riding and pushing, and improves the stability and service life of the carriage frame.

[0061] Further, the linkage device 100 further has a first fixing member 15 rotatably mounted to the first free end 112 of the first linkage 11 along a first rotation shaft 151. Optionally, the first fixing member 15 is an L-shaped member including a first fixing plate and a second fixing plate arranged vertically, the first linkage 11 is rotatably mounted to the first fixing plate, and the second fixing plate is rotatably mounted to the linkage rod 205, which is simple in structure, easy to manufacture and convenient to install. Further, the linkage device 100 further has a second fixing member 16 rotatably mounted to the second free end 122 of the second linkage 12 along a second rotation shaft 161. The second fixing member 16 includes a third fixing plate and a fourth fixing plate arranged vertically, the second linkage 12 is rotatably mounted to the third fixing plate, and the fourth fixing plate is rotatably mounted to the linkage rod 205, which is simple in structure, easy to manufacture and convenient to install. The above arrangement makes the first fixing member 15 and the second fixing member 16 fixed relative to the position of the frame when the frame is fully opened, and the internal linkage of the linkage device 100 is locked, which is equivalent to adding a cross brace to the frame, effectively reducing the lateral shaking of the frame, improving the rigidity of the frame and ensuring the comfort of children riding. In the embodiment, the two first fixing members 15 are connected to the two linkage rods 205 on the two sides, respectively, the two second fixing members 16 are connected to the two linkage rods 205 on the two sides, respectively, and the connection positions of the first fixing member 15 and the second fixing member 16 on the linkage rod 205 are fixed, thereby reducing the arrangement of the sliding sleeve assembly and the locking assembly and improving the smoothness of the opening and folding of the frame.

[0062] Further, the child vehicle further has a seat frame including a seat rod 206 and a sliding sleeve in sliding cooperation with the seat rod 206, the seat rod 206 is rotatably mounted to the linkage rod 205 through a seat rod rotation shaft, and the sliding sleeve is rotatably mounted to the side armrest 204; the second fixing plate is rotatably arranged relative to the seat rod rotation shaft. In this way, the position of the first linkage 11 on the linkage rod 205 is fixed, and the rotation and folding of the seat frame relative to the side support 200 are realized, thereby improving the folding performance of the child vehicle.

[0063] It should be noted that the above is only a preferred embodiment of the present disclosure and the technical principle applied. Those skilled in the art will understand that the present disclosure is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the protection scope of the present disclosure. Therefore, although the present disclosure has been described in more detail through the above embodiments, the present disclosure is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present disclosure, and the scope of the present disclosure is determined by the appended claims.

Claims

1. A linkage device, characterized in that, It includes two sets of fork-shaped components. Each set of fork-shaped components includes a first link and a second link that are rotatably connected about a connecting shaft. At least one of the first link and the second link is provided with a sliding groove. The connecting shaft is slidably disposed relative to the sliding groove. The two first links of the two sets of fork-shaped assemblies are movably connected, and the two second links of the two sets of fork-shaped assemblies are movably connected.

2. The linkage device according to claim 1, characterized in that, The first connecting rod has a first engaging end and a first free end disposed opposite to each other, and the second connecting rod has a second engaging end and a second free end disposed opposite to each other; The linkage device has an unfolded state and a folded state. When the unfolded state is converted to the folded state, the first free ends of the two first linkages move toward each other and approach each other along a first direction. The distance between the first free ends and the second free ends of at least one set of the fork-shaped components remains unchanged in a second direction perpendicular to the first direction.

3. The linkage device according to claim 2, characterized in that, The two first connecting ends of the two first connecting rods are rotatably connected, and the two second connecting ends of the two second connecting rods are rotatably connected; Alternatively, the linkage may also have an intermediate fork assembly, which includes a first intermediate link and a second intermediate link that are rotatably connected. One of the two first engagement ends of the two first links is rotatably connected to the first intermediate link, and the other is rotatably connected to the second intermediate link. One of the two second engagement ends of the two second links is rotatably connected to the second intermediate link, and the other is rotatably connected to the first intermediate link.

4. The linkage device according to claim 2, characterized in that, The two first links are symmetrically arranged, and the two second links are symmetrically arranged; The two first free ends of the two first links are arranged along the first direction, and the two second free ends of the two second links are arranged along the first direction; when the two first free ends move toward each other and approach each other, the two second free ends also move toward each other and approach each other, and the movement of the two first free ends toward each other is synchronized with the movement of the two second free ends toward each other.

5. The linkage device according to claim 2, characterized in that, When the linkage device is extended to the extended position, the connecting shaft slides to the first inner wall of the sliding groove and abuts against the first inner wall to restrict the movement stroke of the connecting shaft. At this time, the first connecting rod and the second connecting rod are locked in motion. When the connecting rod device is folded to the folded position, the connecting shaft slides to the second inner wall of the sliding groove and abuts against the second inner wall to limit the movement stroke of the connecting shaft; The sliding groove is arc-shaped, and the arc shape is the trajectory formed on the second link by the intersection of the first link and the second link during the lateral unfolding or folding of the link device.

6. The linkage device according to claim 2, characterized in that, The linkage device further includes a first fixing member rotatably mounted on the first free end of the first link along a first axis and a second fixing member rotatably mounted on the second free end of the second link along a second axis. At least one of the first fixing member and the second fixing member is provided with a fixing member rotation axis, which extends along a direction perpendicular to the first rotation axis or along a direction perpendicular to the second rotation axis.

7. The linkage device according to claim 6, characterized in that, The first fixing member is provided with a mounting hole, and the through direction of the mounting hole is perpendicular to the first rotating shaft; The rotation axis of the first fastener extends along the direction of the central axis of the mounting hole.

8. A children's product comprising two side supports that come closer together to fold or move further apart to unfold, and a linkage device disposed between the two side supports, characterized in that, The linkage device is the linkage device as described in any one of claims 1-7.

9. The children's product according to claim 8, characterized in that, The children's product is a stroller. The side support includes a front support, a rear support, a push rod, a side armrest, and a linkage mechanism. The front support and the rear support are rotatably connected. The side armrest is rotatably connected to the rear support. The push rod is rotatably connected to the side armrest. The linkage mechanism has a linkage rod at both ends that are rotatably connected to the push rod and the rear support respectively. The linkage rod is connected to the front support through a linkage assembly. When the stroller is folded, the linkage rod drives the front support and the push rod to move towards the rear support and fold. The first connecting rod has a first engaging end and a first free end disposed opposite to each other, and the second connecting rod has a second engaging end and a second free end disposed opposite to each other; the connecting rod device is disposed between a pair of the linkage rods, the first free end of the first connecting rod is rotatably engaged with the linkage rod, and the second free end of the second connecting rod is rotatably engaged with the linkage rod.

10. The children's product according to claim 9, characterized in that, The linkage device further includes a first fixing member rotatably mounted on the first free end of the first link along a first rotating axis. The first fixing member includes a first fixing plate and a second fixing plate arranged vertically. The first link is rotatably mounted on the first fixing plate, and the second fixing plate is rotatably mounted on the linkage. And / or, the linkage device further has a second fixing member rotatably mounted on the second free end of the second link along the second axis of rotation, the second fixing member including a third fixing plate and a fourth fixing plate arranged vertically, the second link being rotatably mounted on the third fixing plate, and the fourth fixing plate being rotatably mounted on the linkage rod; The stroller also has a seat frame, the seat frame having a seat rod and a sliding sleeve that slides with the seat rod, the seat rod being rotatably mounted on the linkage rod via a seat rod pivot, and the sliding sleeve being rotatably mounted on the side armrest; The second fixing plate is rotatably mounted relative to the seat rod shaft.

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