Connecting rod device and children product

Abstract

The utility model relates to the technical field of children products and discloses a connecting rod device and a children product. The connecting rod device comprises two fork-shaped assemblies, each fork-shaped assembly comprises a first connecting rod and a second connecting rod which are rotationally connected around a connecting shaft, at least one of the first connecting rod and the second connecting rod is provided with a sliding groove, and the connecting shaft and the sliding groove are arranged in a relative sliding mode. The two first connecting rods are movably connected, and the two second connecting rods are movably connected. The children product comprises two side supports and the connecting rod device, wherein the two side supports draw close to each other to be folded or far away from each other to be unfolded, and the connecting rod device is arranged between the two side supports. According to the connecting rod device, the relative movement stroke between the two free ends on the same side of the fork-shaped assembly can be shortened, the space needed for installation is reduced, and the connecting rod device can be conveniently installed on a frame; moreover, the arrangement of a sliding sleeve assembly and a locking assembly on the frame can be reduced, the structure of the frame is simplified, and the opening and folding smoothness of the frame is improved.

Description

Technical Field

[0001] This utility model relates to the field of children's products technology, and in particular to a linkage device and children's products. Background Technology

[0002] Strollers are usually foldable. When folded, the frame height is reduced, and the front and back, as well as the sides, are folded up, reducing the overall size and making them easier to store and move.

[0003] To achieve the folding function of children's strollers, a cross brace structure is often used in the frame. The cross brace structure includes a first and second rod that intersect and pivotally connect at the intersection. When the frame is folded, the cross brace structure is in a folded state; when the frame is unfolded, the cross brace structure is in an open state. However, because the longitudinal height of the first and second rods changes when the cross brace structure is opened or folded laterally, the relative travel between the free ends of the first and second rods on the same side is relatively large. This results in a large installation space required for the cross brace, making installation on the frame inconvenient. Furthermore, in existing technologies, both ends of the cross brace structure need to be slidably mounted on the frame. This necessitates the use of sliding sleeves and locking components between the cross brace structure and the frame, leading to a complex frame structure, inconvenient installation, and the potential for multiple sliding sleeves to interfere with the unfolding and retraction of other frame rods, affecting the smoothness of opening and folding the frame.

[0004] Therefore, there is an urgent need for a linkage device and children's products to solve the above-mentioned technical problems. Utility Model Content

[0005] Based on the above, the purpose of this utility model is to provide a linkage device and children's products, which have a simple structure, are easy to install, reduce the use of sliding sleeve components and locking components, and do not affect the smoothness of opening and folding of the frame.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a linkage device, including two sets of fork-shaped components. Each set of fork-shaped components includes a first link and a second link rotatably connected around a connecting shaft. At least one of the first link and the second link is provided with a sliding groove, and the connecting shaft is slidably disposed relative to the sliding groove. The two first links of the two sets of fork-shaped components are movably connected, and the two second links of the two sets of fork-shaped components are movably connected.

[0008] In some possible implementations, the first link has a first engaging end and a first free end disposed opposite to each other, and the second link has a second engaging end and a second free end disposed opposite to each other; the link device has an unfolded state and a folded state, and when the unfolded state is converted to the folded state, the first free ends of the two first links 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 assemblies remains unchanged in a second direction perpendicular to the first direction.

[0009] In some possible implementations, the two first joint ends of the two first links are rotatably connected, and the two second joint ends of the two second links are rotatably connected.

[0010] Alternatively, the linkage may further include 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.

[0011] In some possible implementations, the two first links are arranged symmetrically, and the two second links are arranged symmetrically.

[0012] 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.

[0013] In some possible implementations, 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 limit the movement stroke of the connecting shaft. At this time, the first link and the second link are locked in motion.

[0014] 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;

[0015] 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.

[0016] In some possible implementations, the linkage device further includes a first fixing member rotatably mounted on the first free end of the first link along a first axis of rotation and a second fixing member rotatably mounted on the second free end of the second link along a second axis of rotation.

[0017] 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.

[0018] In some possible implementations, the first fastener is provided with a mounting hole, the through direction of which is perpendicular to the first rotating shaft;

[0019] The rotation axis of the first fastener extends along the direction of the central axis of the mounting hole.

[0020] This utility model also provides a children's product, including two side supports that are close together to fold or far apart to unfold, and a connecting rod device disposed between the two side supports, wherein the connecting rod device is any of the connecting rod devices described above.

[0021] In some possible implementations, the child product is a stroller, and 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, and the push rod is rotatably connected to the side armrest.

[0022] 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.

[0023] 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.

[0024] In some possible implementations, the linkage device further includes a first fixing member rotatably mounted on the first free end of the first link along a first axis of rotation. 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.

[0025] 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 includes a third fixing plate and a fourth fixing plate arranged vertically. The second link is rotatably mounted on the third fixing plate, and the fourth fixing plate is rotatably mounted on the linkage.

[0026] In some possible implementations, the stroller also has a seat frame with a seat post and a sliding sleeve that slides with the seat post. The seat post is rotatably mounted on the linkage rod via a seat post pivot, and the sliding sleeve is rotatably mounted on the side armrest.

[0027] The second fixing plate is rotatably mounted relative to the seat rod shaft.

[0028] The beneficial effects of this utility model are as follows:

[0029] The linkage device provided by this utility model includes two sets of fork-shaped components. Each set of fork-shaped components includes a first link and a second link rotatably connected around a connecting shaft. At least one of the first link and the second link is provided with a sliding groove. During the relative rotation of the first link and the second link, the connecting shaft can slide along the sliding groove. This arrangement allows the change in distance along the height direction between the two free ends of each set of fork-shaped components during the unfolding or folding of the linkage device to be at least partially converted into the sliding of the connecting shaft within the sliding groove. This shortens the relative travel distance between the two free ends on the same side of the fork-shaped component, reduces the space required for installation, and facilitates the installation of the linkage device on the frame. Furthermore, this utility model can fix at least one free end of the linkage device on the frame, so that the free end does not need to slide relative to the frame during unfolding and folding. Therefore, it reduces the need for sliding sleeve components and locking components, simplifies the frame structure, and does not affect the smoothness of opening and folding of the frame. It is easy to install and has low cost. Attached Figure Description

[0030] Figure 1 This is a structural schematic diagram of the first type of linkage device in its deployed state provided in this embodiment of the utility model;

[0031] Figure 2 This is a structural schematic diagram of the first linkage device provided in this embodiment of the present invention during the unfolding or folding process;

[0032] Figure 3 This is a structural schematic diagram of the first linkage device in a folded state provided in this embodiment of the utility model;

[0033] Figure 4 This is a structural schematic diagram of the second type of linkage device in the deployed state provided in this embodiment of the utility model;

[0034] Figure 5This is a structural schematic diagram of the third type of linkage device in the deployed state provided in this embodiment of the utility model;

[0035] Figure 6 This is a schematic diagram of the structure of the second connecting rod provided in an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the first angle structure of the children's stroller provided in this embodiment of the utility model;

[0037] Figure 8 yes Figure 7 A partial structural diagram of a children's stroller;

[0038] Figure 9 This is a schematic diagram of the second angle structure of the children's stroller provided in this embodiment of the utility model;

[0039] Figure 10 yes Figure 9 A partial structural diagram of a children's stroller.

[0040] In the picture:

[0041] 100. Linkage device; 10. Fork-shaped assembly; 11. First link; 111. First engagement end; 112. First free end; 12. Second link; 121. Second engagement 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-shaped assembly; 21. First intermediate link; 22. Second intermediate link;

[0042] 200. Side support; 201. Front support; 202. Rear support; 203. Push rod; 204. Side armrest; 205. Linkage rod; 206. Seat rod. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] This embodiment provides a linkage device that can be used in the frame of a children's vehicle to solve the problems of existing cross brace structures having both ends slidably connected to the frame, resulting in a complex frame structure, inconvenient installation, and affecting the smoothness of opening and folding the frame.

[0048] like Figures 1-6As shown, the linkage device 100 provided in this embodiment includes two sets of fork-shaped components 10. Each set of fork-shaped components 10 includes a first connecting rod 11 and a second connecting rod 12 arranged intersecting each other. The first connecting rod 11 and the second connecting rod 12 are rotatably connected at the intersection by a connecting shaft 13. At least one of the first connecting rod 11 and the second connecting rod 12 is provided with a sliding groove 14, and the connecting shaft 13 is slidably arranged relative to the sliding groove 14. The two first connecting rods 11 of the two sets of fork-shaped components 10 are movably connected, and the two second connecting rods 12 of the two sets of fork-shaped components are movably connected. This configuration allows the change in distance along the height direction between the two free ends of each fork-shaped component 10 during unfolding or folding of the linkage device 100 to be at least partially converted into sliding of the connecting shaft 13 within the sliding groove 14. This shortens the relative travel distance between the two free ends on the same side of the fork-shaped component 10, reduces the space required for installation, and facilitates the installation of the linkage device 100 on the frame. Furthermore, this embodiment allows at least one free end of the linkage device 100 to be fixedly mounted on the frame, eliminating the need for the free end to slide relative to the frame during unfolding and folding. This reduces the need for sliding sleeve and locking components, simplifies the frame structure, and does not affect the smoothness of opening and folding the frame. It is easy to install and cost-effective. It should be noted that in this embodiment, "fixedly mounted on the frame" means that the mounting position of the corresponding linkage on the frame is fixed and will not move. For example, the linkage can be fixed to the frame by fasteners or rotatably connected to the frame by a pin, rather than being slidably mounted on the frame.

[0049] Further, the first link 11 has a first engaging end 111 and a first free end 112 disposed opposite to each other, and the second link 12 has a second engaging end 121 and a second free end 122 disposed opposite to each other. The linkage device has an unfolded state and a folded state. When transitioning from the unfolded state to the folded state, the first free ends 112 of the two first links 11 move toward each other and approach each other along a first direction; the distance between the first free ends 112 and the second free ends 122 in at least one set of fork-shaped assemblies 10 remains unchanged in a second direction perpendicular to the first direction. It should be noted that, in this embodiment, the first direction refers to... Figure 1 The horizontal direction in the middle, the second direction refers to Figure 1The longitudinal direction of the linkage device 100 is as follows. The above arrangement ensures that during the lateral unfolding or folding of the linkage device 100, the longitudinal height change (i.e., the distance change of the first free end 112 and the second free end 122 of the fork-shaped assembly 10 along the second direction) caused by the relative rotation of at least one set of first and second links 11 and 12 can be entirely converted into sliding of the connecting shaft 13 within the sliding groove 14. This allows the first free end 112 and the second free end 122 of at least one set of fork-shaped assemblies 10 to be fixedly mounted on the frame. The first free end 112 and the second free end 122 do not need to slide relative to the frame as the frame unfolds and folds, thus reducing the need for sliding sleeve assemblies and locking assemblies, simplifying the frame structure, and not affecting the smoothness of opening and folding the frame. Installation is convenient and cost-effective.

[0050] Optionally, in the linkage device 100, two first linkages 11 and two second linkages 12 are symmetrically arranged; and the two first free ends 112 of the two first linkages 11 are arranged along a first direction, and the two second free ends 122 of the two second linkages 12 are arranged along the first direction. Thus, when the two first free ends 112 move towards each other and approach, the two second free ends 122 also move towards each other and approach, 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. This arrangement is structurally reasonable and compact, ensuring synchronous movement of the components on both sides of the linkage device 100, and improving the stability and balance of the linkage device 100.

[0051] like Figures 1-3 As shown, in some embodiments, the two sets of fork-shaped components 10 can be directly rotatably connected. Specifically, the two first joint ends 111 of the two first connecting rods 11 are rotatably connected, and the two second joint ends 121 of the two second connecting rods 12 are rotatably connected. Optionally, the two first connecting rods 11 can be rotatably connected by rivets, and the two second connecting rods 12 can also be rotatably connected by rivets. Further, in the two sets of fork-shaped components 10, the first connecting rod 11 of one set is located in front of the second connecting rod 12, and the first connecting rod 11 of the other set is located in front of the second connecting rod 12, that is, the two first connecting rods 11 are arranged one in front of the other, and the two second connecting rods 12 are arranged one in front of the other. This arrangement makes the connection more stable, the structural strength higher, and increases the support effect and service life of the connecting rod device 100.

[0052] like Figure 4 and Figure 5As shown, in some other embodiments, the two sets of fork-shaped components 10 can also be indirectly connected through an intermediate fork-shaped component 20. Specifically, the intermediate fork-shaped component 20 includes a first intermediate connecting rod 21 and a second intermediate connecting rod 22 that are rotatably connected. One of the two first engaging ends 111 of the two first connecting rods 11 is rotatably connected to the first intermediate connecting rod 21, and the other is rotatably connected to the second intermediate connecting rod 22. One of the two second engaging ends 121 of the two second connecting rods 12 is rotatably connected to the second intermediate connecting rod 22, and the other is rotatably connected to the first intermediate connecting rod 21. It should be noted that the number of intermediate fork-shaped components 20 can be one, two, or more sets, and the first intermediate connecting rod 21 and the second intermediate connecting rod 22 in each set of intermediate fork-shaped components 20 can be rotatably connected, or they can be rotatably connected while also sliding relative to each other. This embodiment does not limit this, as long as the first connecting rod 11 and the second connecting rod 12 of the fork-shaped components 10 at the two edge positions can slide relative to each other.

[0053] Optionally, in this embodiment, the sliding groove 14 is disposed on the second connecting rod 12, one end of the connecting shaft 13 is connected to the first connecting rod 11, and the other end is movably engaged in the sliding groove 14. Specifically, the connecting shaft 13 can be a rivet, pin, bolt, etc., passing through 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 engaged outside the sliding groove 14 by a structure such as a washer; such a configuration is simple in structure, convenient in installation, and reliable in use. Of course, in other embodiments, the sliding groove 14 can also be disposed only on the first connecting rod 11, or the sliding groove 14 can be disposed on both the first connecting rod 11 and the second connecting rod 12, which can also realize the sliding of the connecting shaft 13 in the sliding groove 14 and realize the relative movement between the first connecting rod 11 and the second connecting rod 12.

[0054] In the existing technology, children's strollers that can fold left and right lack a complete rigid connecting rod between the left and right side supports, resulting in poor frame rigidity. During push-and-go use, the frame is subjected to the weight load of the child riding on it, which easily causes obvious shaking and bumping. In addition, the support under the seat tends to open to the sides, reducing the stability of the frame and shortening its service life.

[0055] To solve the above problems, the linkage device 100 provided in this embodiment can also achieve mutual locking between the first linkage 11 and the second linkage 12. Specifically, as shown... Figure 6As shown, in this embodiment, the sliding groove 14 has a first inner wall 141 and a second inner wall 142. When the linkage 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 this time, the first connecting rod 11 and the second connecting rod 12 are locked in motion. When the linkage 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 linkage device 100 is installed between the left and right side supports of the frame, since each fork-shaped component 10 is provided with a connecting shaft 13 and a sliding groove 14, when the linkage device 100 is laterally unfolded 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 link 11 and the corresponding second link 12 are locked together and cannot be opened to the sides. Thus, the linkage device 100 provides an inward preload to the left and right sides of the frame, effectively preventing the supports from opening to the sides, significantly enhancing the rigidity of the frame in the unfolded state, reducing the swaying of the frame when children ride and push, and improving the stability and service life of the frame. Furthermore, the sliding groove 14 is arc-shaped, and the arc shape is the trajectory formed on the second link 12 by the intersection of the first link 11 and the second link 12 during the lateral unfolding or folding of the linkage device 100. This design allows the arc groove to guide the movement of the connecting shaft 13, making the connecting shaft 13 run more smoothly and preventing the connecting shaft 13 from shaking due to an excessively large sliding groove 14 or from getting stuck due to an improperly designed sliding groove 14.

[0056] In this embodiment, the linkage device 100 further includes a first fixing member 15 and a second fixing member 16. The first fixing member 15 is rotatably mounted on the first free end 112 of the first connecting rod 11 along the first rotating shaft 151, and the second fixing member 16 is rotatably mounted on the second free end 122 of the second connecting rod 12 along the second rotating shaft 161, thereby realizing the connection between the linkage device 100 and the frame structure. When the linkage device 100 is laterally unfolded or folded, the distance between the first fixing member 15 and the second fixing member 16 in the second direction remains unchanged. That is, when the frame is unfolded or folded, the positions of the first fixing member 15 and the second fixing member 16 can remain stationary. The change in longitudinal height of the first connecting rod 11 and the second connecting rod 12 due to rotation can be converted into sliding between the connecting shaft 13 and the sliding groove 14, thereby avoiding the sliding component provided between the linkage device 100 and the frame. Exemplarily, in this embodiment, the first fixing member 15 can be rotatably connected to the end of the first connecting rod 11 by a rivet; the second fixing member 16 can be rotatably connected to the end of the second connecting rod 12 by a rivet.

[0057] Furthermore, the first fixing member 15 is provided with a fixing member rotation axis, which extends in a direction perpendicular to the first rotating shaft 151, so as to realize relative rotation between the first fixing member 15 and the frame, facilitating the unfolding and folding of the frame; and / or, the second fixing member 16 is provided with a fixing member rotation axis, which extends in a direction perpendicular to the second rotating shaft 161, so as to realize relative rotation between the second fixing member 16 and the frame, facilitating 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 rotating shaft 151, and the fixing member rotation axis of the first fixing member 15 extends in the direction of the central axis of the mounting hole. This arrangement allows the first fixing member 15 to be rotatably mounted on the frame members through the mounting hole, resulting in a simple structure and convenient installation.

[0058] This embodiment also provides a children's product, including two side supports 200 that are close together to fold or far apart to unfold, and a linkage device 100 as described above, which is disposed between the two side supports 200. This children's product can be a stroller, baby carriage, or pushcart. Specifically, this embodiment uses a baby carriage as an example for explanation.

[0059] refer to Figures 7-10As shown, the stroller in this embodiment includes two foldable side supports 200 and a linkage device 100 disposed between the two side supports 200. Each side support 200 includes a front support 201, a rear support 202, a push rod 203, a side armrest 204, and a linkage mechanism. The front support 201 and the rear support 202 are rotatably connected, the side armrest 204 is rotatably connected to the rear support 202, and the push rod 203 is rotatably connected to the side armrest 204. The linkage mechanism has a linkage rod 205, the two ends of which are rotatably connected to the push rod 203 and the rear support 202, respectively. The linkage rod 205 is connected to the front support 201 via a linkage assembly. When the stroller is folded, the linkage rod 205 drives the front support 201 and the push rod 203 to fold towards the rear support 202. In this embodiment, the linkage device 100 is disposed between a pair of linkage rods 205. The first free end 112 of the first linkage 11 is rotatably engaged with the linkage rod 205, and the second free end 122 of the second linkage 12 is rotatably engaged with the linkage rod 205. This embodiment achieves lateral support for the frame through the linkage device 100, thereby improving the frame rigidity. Furthermore, this embodiment shortens the relative travel between the two free ends on the same side of the linkage device 100, reducing the space required for installation and facilitating the installation of the linkage device 100 on the frame. At the same time, since the linkage device 100 can be fixedly connected to the side bracket 200, the setting of the sliding sleeve assembly and locking assembly is reduced, simplifying the frame structure and improving the smoothness of opening and folding the frame. Furthermore, when the two side supports 200 are fully extended, the connecting shaft 13 can slide to abut against the first inner wall 141 of the sliding groove 14, thereby locking the first connecting rod 11 and the second connecting rod 12 and preventing them from opening further to the sides. Therefore, the connecting rod device 100 provides an inward preload to the two side supports 200, effectively preventing the two side supports 200 from opening to the sides, significantly enhancing the rigidity of the frame in the extended state, reducing the swaying of the frame when children ride and push, and improving the stability and service life of the frame.

[0060] Furthermore, the linkage device 100 also has a first fixing member 15, which is rotatably mounted on the first free end 112 of the first connecting rod 11 along the first rotating shaft 151. Optionally, the first fixing member 15 is an L-shaped member, including a vertically arranged first fixing plate and a second fixing plate. The first connecting rod 11 is rotatably mounted on the first fixing plate, and the second fixing plate is rotatably mounted on the linkage rod 205. Its structure is simple, easy to manufacture, and convenient to install. Furthermore, the linkage device 100 also has a second fixing member 16, which is rotatably mounted on the second free end 122 of the second connecting rod 12 along the second rotating shaft 161. The second fixing member 16 includes a vertically arranged third fixing plate and a fourth fixing plate. The second connecting rod 12 is rotatably mounted on the third fixing plate, and the fourth fixing plate is rotatably mounted on the linkage rod 205. Its structure is simple, easy to manufacture, and convenient to install. The above configuration ensures that when the frame is fully opened, the positions of the first fixing member 15 and the second fixing member 16 relative to the frame remain fixed, and the internal linkage of the linkage device 100 is locked, effectively adding a cross brace to the frame. This significantly reduces lateral swaying of the frame, improves frame rigidity, and ensures child comfort. In this embodiment, the two first fixing members 15 are connected to the two linkage rods 205 on both sides, and the two second fixing members 16 are also connected to the two linkage rods 205 on both sides. Furthermore, the connection positions of the first fixing members 15 and the second fixing members 16 on the linkage rods 205 remain fixed, thereby reducing the need for sliding and locking components and improving the smoothness of frame opening and folding.

[0061] Furthermore, the stroller also features a seat frame with a seat post 206 and a sliding sleeve that slidably engages with the seat post 206. The seat post 206 is rotatably mounted on a linkage rod 205 via a seat post pivot, and the sliding sleeve is rotatably mounted on a side armrest 204. A second fixing plate is rotatably mounted relative to the seat post pivot. This not only fixes the position of the first linkage rod 11 on the linkage rod 205 but also allows the seat frame to rotate and fold relative to the side support 200, improving the stroller's folding performance.

[0062] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of 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 further include 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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