Folding articulation assembly and child carrier

Abstract

The application discloses a folding joint assembly and a child carrier. The folding joint assembly comprises a first joint element, a second joint element and a third joint element. The first joint element is rotationally connected with the third joint element, and the second joint element is rotationally connected with the third joint element. A linkage mechanism is arranged between the first joint element and the second joint element, so that the first joint element and the second joint element can be synchronously unfolded and folded. The folding joint assembly comprises a locking piece for locking the first joint element to keep the first joint element in an unfolded state. The first joint element has a first limiting part abutting against the second joint element to limit rotation of the second joint element in a first direction in the unfolded state. The first joint element is moved from the unfolded state to a folded state, the first limiting part is disengaged from the second joint element, and after the unfolded state and the locking, the three joint elements interact with each other and the first limiting part is additionally added, so that more action points are provided, and therefore the structural strength of the locking is improved.

Description

Technical Field

[0001] This application relates to the technical field of vehicle technology, specifically a folding joint assembly and a child vehicle. Background Technology

[0002] Among existing foldable vehicles, for example, patent document CN108945076B discloses a baby stroller, including a frame, a front support rod, a rear support rod, and a push rod rotatably connected to each other. The front support rod is provided with a sliding sleeve, an upper connecting rod is provided between the sliding sleeve and the push rod, and a lower connecting rod is provided between the sliding sleeve and the rear support rod. The sliding sleeve, upper connecting rod, and lower connecting rod constitute a linkage mechanism for the coordinated unfolding and folding of the front support rod, rear support rod, and push rod. A locking element is provided between the push rod and the rear support rod to keep the frame in the unfolded state, and with the assistance of the linkage mechanism, it restricts the rotation of the front support rod. In this vehicle, the joints of the front support rod, rear support rod, and push rod are limited only by the locking element, and the locking strength is insufficient. Utility Model Content

[0003] This application provides a folding joint assembly that improves the structural strength of the locked state when unfolded.

[0004] This application provides a folding joint assembly, including a first joint element, a second joint element, and a third joint element. The first joint element is rotatably connected to the third joint element, and the second joint element is rotatably connected to the third joint element. A linkage mechanism is provided between the first joint element and the second joint element so that the first joint element and the second joint element can be opened and closed synchronously. The folding joint assembly includes a locking member for locking the first joint element to keep it in an opened state. The first joint element has a first limiting part that abuts against the second joint element in the opened state to restrict its rotation in a first direction. When the first joint element moves from the opened state to the folded state, the first limiting part disengages from the second joint element.

[0005] Several alternative methods are provided below, but they are not intended as additional limitations on the overall solution above. They are merely further additions or optimizations. Provided there are no technical or logical contradictions, each alternative method can be combined individually with respect to the overall solution above, or multiple alternative methods can be combined with each other.

[0006] Optionally, the first joint element has a second limiting portion that, in the unfolded state, abuts against the second joint element to restrict its rotation in a second direction, the first direction being opposite to the second direction.

[0007] Optionally, both the first joint element and the second joint element are sheet-like structures.

[0008] Optionally, the first joint element and the second joint element are coplanar.

[0009] Optionally, the third joint element has a third limiting portion that, in the unfolded state, abuts against the second joint element to restrict its rotation in a second direction, the first direction being opposite to the second direction.

[0010] Optionally, one of the second joint element and the third joint element is provided with a limiting pin, and the other is provided with a limiting groove adapted to the limiting pin. In the unfolded state, the limiting pin abuts against the groove wall of the limiting groove to restrict the second joint element from rotating in the second direction.

[0011] Optionally, the first joint element is rotatable about a first axis relative to the third joint element, and the second joint element is rotatable about a second axis relative to the third joint element, wherein the first axis and the second axis are parallel to each other.

[0012] Optionally, the first axis and the second axis are not collinear.

[0013] Optionally, the linkage mechanism includes a link hinged between the first joint element and the second joint element.

[0014] Optionally, the linkage mechanism includes a first meshing tooth and a second meshing tooth respectively disposed on the first joint element and the second joint element, wherein the first meshing tooth and the second meshing tooth directly mesh, or a gear set is disposed between the two.

[0015] This application also provides a child vehicle including the folding joint assembly described in this application.

[0016] Optionally, the child vehicle includes a handle assembly, a first foot assembly, and a second foot assembly, wherein the handle assembly is connected to a first joint element, the first foot assembly is connected to the second joint element, and the second foot assembly is connected to the third joint element.

[0017] Optionally, the child carrier has an unfolded state and a folded state. When the stroller switches from the unfolded state to the folded state, the handle assembly and the first foot assembly rotate toward the second foot assembly.

[0018] In the folding joint assembly of this application, in the unfolded state, the locking member locks the first joint element to fix it relative to the third joint element, and then the first limiting part of the first joint element abuts against the second joint element. Furthermore, a linkage mechanism is provided between the first joint element and the second joint element, and the three joint elements interact with each other, with more points of action, thereby improving the structural strength of the locking mechanism. Attached Figure Description

[0019] Figure 1This is a structural view of a folding joint assembly in its unfolded state according to an embodiment of this application;

[0020] Figure 2 for Figure 1 Structural view of the folding joint assembly in its folded state;

[0021] Figure 3 for Figure 1 Exploded view of the folding joint assembly;

[0022] Figure 4 for Figure 3 Structural view of the second joint element;

[0023] Figure 5 for Figure 3 Structural view of the first joint element;

[0024] Figure 6 This is a structural view of a children's stroller according to an embodiment of this application;

[0025] Figure 7 This is an exploded view of a folding joint assembly according to an embodiment of this application;

[0026] Figure 8 This is a structural view of a folding joint assembly according to an embodiment of this application;

[0027] Figure 9 for Figure 8 Structural view of the third joint element after half-section.

[0028] The annotations in the figure are explained as follows:

[0029] 100. Folding joint assembly; 110. First joint element; 111. First meshing tooth;

[0030] 120. Second joint element; 121. Third surface; 122. Fourth surface; 123. Limiting pin; 124. Sixth surface; 125. Seventh surface; 126. Second meshing tooth;

[0031] 130. Third joint element; 131. Limiting groove;

[0032] 140. Locking component; 150. Connecting rod;

[0033] 210. First limiting part; 220. Second limiting part; 230. Third limiting part;

[0034] 300. Frame; 310. Handlebar assembly; 320. First caster assembly; 321. First caster wheel; 330. Second caster assembly; 331. Second caster wheel. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that when a component is said to be "connected" to another component, it can be directly connected to the other component or it can be connected to a component in between. When a component is said to be "set on" another component, it can be directly set on the other component or it may be set to a component in between.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] In this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number or order of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] like Figure 1 , Figure 6 and Figure 7 As shown, this application provides a folding joint assembly 100, which can be installed on various vehicles, such as high chairs, strollers, and outdoor trailers. The following embodiments and figures use a stroller as an example.

[0040] like Figures 1-3 and Figure 9 As shown, the folding joint assembly 100 includes a first joint element 110, a second joint element 120, and a third joint element 130. The first joint element 110 and the third joint element 130 are rotatably connected about a first axis, and the second joint element 120 and the third joint element 130 are rotatably connected about a second axis. A linkage mechanism is provided between the first joint element 110 and the second joint element 120 so that the first joint element 110 and the second joint element 120 can be unfolded and folded synchronously. The linkage mechanism provides a first limiting position in the unfolded state.

[0041] The folding joint assembly 100 includes a locking member 140 that locks the first joint element 110 in an unfolded state. In some embodiments, the locking member 140 is movably mounted between the first joint element 110 and the third joint element 130, such as... Figure 1 As shown, the locking member 140 is slidably mounted on the first joint element 110, and has a locked state that acts on the third joint element 130 in the unfolded state, and an unlocked state that disengages from the third joint element 130. For example... Figure 9 As shown, the locking member 140 is rotatably mounted on the third joint element 130 and has a locking state that acts on the first joint element 110 in the unfolded state, and an unlocking state that disengages from the first joint element 110. The locking member 140 provides a second limiting position in the unfolded state, which includes two limiting points that respectively restrict the first joint element 110 from rotating relative to the third joint element 130 in both positive and negative directions.

[0042] The first joint element 110 has a first limiting part 210 that abuts against the second joint element 120 in the unfolded state, restricting its rotation in the first direction. When the locking member 140 is unlocked, the first joint element 110 rotates to approach the third joint element 130, and the second joint element 120 is driven to rotate in the first direction to approach the third joint element 130 through a linkage mechanism. During folding, the first limiting part 210 disengages from the second joint element 120. The first limiting part 210 provides a third limiting position for the folding joint assembly in the unfolded state. Therefore, the folding joint assembly of this embodiment includes at least three limiting positions. Compared with the prior art, the number of limiting positions is increased, which improves the structural strength of the folding joint assembly when locked, improves the stability of the corresponding vehicle in the unfolded state, and reduces the swaying of each joint element in the unfolded state.

[0043] In one embodiment, the first joint element 110 has a second limiting portion 220 that abuts against the second joint element 120 in the unfolded state to restrict its rotation in a second direction, which is opposite to the first direction. The second limiting portion 220 provides a fourth limiting position for the folding joint assembly in the unfolded state, further improving the structural strength when locked and reducing the swaying of each joint element in the unfolded state. When the first joint element 110 moves from the unfolded state to the folded state, the second limiting portion 220 disengages from the second joint element 120.

[0044] Combined with appendix Figures 1-5The first joint element 110 and the second joint element 120 are both sheet-like structures, and the first joint element 110 and the second joint element 120 are coplanar. The third joint element 130 is a sheet-like structure and there are two of them. Along the axial direction, the first joint element 110 and the second joint element 120 are located between the two third joint elements 130. The first axis and the second axis are parallel to each other and not collinear. Each joint element extends in the plane of rotation. Since it is a sheet-like structure, it is permissible to use metal materials in terms of processing and manufacturing, thereby increasing the structural strength of the joint element.

[0045] The first limiting part 210 and the second limiting part 220 are respectively provided on the first surface and the second surface in the circumferential direction of the first joint element 110, wherein the first surface and the second surface are arranged in a generally V-shape. A third surface 121 and a fourth surface 122 are provided on the outer circumferential surface of the second joint element 120, respectively abutting against the first surface and the second surface.

[0046] In a further embodiment, a limiting pin 123 is provided on the second joint element 120, and a limiting groove 131 adapted to the limiting pin 123 is provided on the third joint element 130. The limiting groove 131 is an arc-shaped groove extending around the first axis. In the unfolded state, the limiting pin 123 abuts against the groove wall at one end of the limiting groove 131 to restrict the second joint element 120 from rotating in the second direction. This limiting can serve as a fifth limiting position, thereby further improving the locking effect in the unfolded state. In the folded state, the limiting pin 123 abuts against the groove wall at the other end of the limiting groove 131. Of course, the limiting pin 123 and the limiting groove 131 can be set in opposite directions. For example, the limiting pin 123 can be set on the third joint element 130, and the limiting groove 131 can be set on the second joint element 120.

[0047] In another embodiment, the third joint element 130 has a third limiting portion 230 that abuts against the second joint element 120 in the unfolded state to restrict its rotation in a second direction, the first direction and the second direction being opposite, while the first joint element 110 may provide only the first limiting portion 210, or provide both the first limiting portion 210 and the second limiting portion 220.

[0048] Combined with appendix Figures 7-9 The first joint element 110 and the second joint element 120 are sheet-like structures and are coplanar, with the first axis and the second axis being parallel to each other and not collinear. The third joint element 130 is a housing that surrounds the outer periphery of the first joint element 110 and the second joint element 120, wherein the third joint element 130 has a mounting port for the first joint element 110 and the second joint element 120 to be installed and inserted.

[0049] The first joint element 110 is provided with only a first limiting part 210, and the first limiting part 210 is a fifth surface disposed in the circumferential direction of the first joint element 110. The top side of the third joint element 130 is closed, and the third limiting part 230 is disposed in the inner top surface of the third joint element 130. The second joint element 120 is provided with a sixth surface 124 and a seventh surface 125 in the unfolded state, which abut against the fifth surface and the inner top surface, respectively.

[0050] like Figure 7 and Figure 9 As shown, in one embodiment, the linkage mechanism includes a link 150 hinged between the first joint element 110 and the second joint element 120, wherein the rotation axes at both ends of the link 150 are not collinear with the first axis and the second axis.

[0051] like Figures 1-5 As shown, in another embodiment, the linkage mechanism includes a first meshing tooth 111 and a second meshing tooth 126 respectively disposed on the first joint element 110 and the second joint element 120, the first meshing tooth 111 and the second meshing tooth 126 directly meshing. The first meshing tooth 111 is a plurality of teeth disposed at intervals around a first axis on the first joint element 110, and the second meshing tooth 126 is a plurality of teeth disposed at intervals around a second axis on the second joint element 120.

[0052] In another embodiment, the linkage mechanism includes a gear set disposed between the first joint element 110 and the second joint element 120.

[0053] like Figure 6 As shown, this application provides a stroller, including a frame 300. The frame includes two oppositely arranged side frames, each side frame including a handle assembly 310, a first foot assembly 320, and a second foot assembly 330. The handle assembly 310 is fixedly connected to a first joint element 110, the first foot assembly 320 is fixedly connected to a second joint element 120, and the second foot assembly 330 is fixedly connected to a third joint element 130. A first caster 321 is mounted on the bottom of the first foot assembly 320, and a second caster 331 is mounted on the bottom of the second foot assembly 330.

[0054] When folded, the handle assembly 310 and the first foot assembly 320 rotate to approach the second foot assembly 330; when unfolded, the handle assembly 310 and the first foot assembly 320 rotate to move away from the second foot assembly 330.

[0055] In the folding joint assembly of this application, in the unfolded state, the locking member locks the first joint element to fix it relative to the third joint element, and then the first limiting part of the first joint element abuts against the second joint element. Furthermore, a linkage mechanism is provided between the first joint element and the second joint element, and the three joint elements interact with each other, with more points of action, thereby improving the structural strength of the locking mechanism.

[0056] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as the combination of these technical features does not contradict each other, it should be considered to be within the scope of this specification. When technical features of different embodiments are embodied in the same drawing, it can be regarded as the drawing also disclosing examples of combinations of the various embodiments involved.

[0057] The above embodiments are merely illustrative of several implementation methods of this application, and their descriptions are quite specific and detailed. However, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these modifications and improvements all fall within the protection scope of this application.

Claims

1. A folding joint assembly, comprising a first joint element, a second joint element, and a third joint element, wherein the first joint element is rotatably connected to the third joint element, and the second joint element is rotatably connected to the third joint element; a linkage mechanism is provided between the first joint element and the second joint element to enable the first joint element and the second joint element to unfold and fold synchronously; the folding joint assembly includes a locking member for locking the first joint element to maintain it in an unfolded state, characterized in that... The first joint element has a first limiting portion that abuts against the second joint element in the unfolded state to restrict its rotation in a first direction. When the first joint element moves from the unfolded state to the folded state, the first limiting portion disengages from the second joint element.

2. The folding joint assembly according to claim 1, characterized in that, The first joint element has a second limiting portion that, in the unfolded state, abuts against the second joint element to restrict its rotation in a second direction, the first direction being opposite to the second direction.

3. The folding joint assembly according to claim 1, characterized in that, Both the first joint element and the second joint element are sheet-like structures.

4. The folding joint assembly according to claim 1, characterized in that, The first joint element and the second joint element are coplanar.

5. The folding joint assembly according to claim 1, characterized in that, The third joint element has a third limiting portion that, in the unfolded state, abuts against the second joint element to restrict its rotation in a second direction, the first direction being opposite to the second direction.

6. The folding joint assembly according to claim 5, characterized in that, One of the second joint element and the third joint element is provided with a limiting pin, and the other is provided with a limiting groove adapted to the limiting pin. In the unfolded state, the limiting pin abuts against the groove wall of the limiting groove to restrict the second joint element from rotating in the second direction.

7. The folding joint assembly according to claim 1, characterized in that, The first joint element is rotatable about a first axis relative to the third joint element, and the second joint element is rotatable about a second axis relative to the third joint element, wherein the first axis and the second axis are parallel to each other.

8. The folding joint assembly according to claim 7, characterized in that, The first axis and the second axis are not collinear.

9. The folding joint assembly according to claim 1, characterized in that, The linkage mechanism includes a connecting rod hinged between the first joint element and the second joint element.

10. The folding joint assembly according to claim 1, characterized in that, The linkage mechanism includes a first meshing tooth and a second meshing tooth respectively disposed on the first joint element and the second joint element, wherein the first meshing tooth and the second meshing tooth directly mesh, or a gear set is disposed between the two.

11. A child vehicle, characterized in that, Includes the folding joint assembly as described in any one of claims 1-10.

12. The child vehicle according to claim 11, characterized in that, It includes a handle assembly, a first foot assembly, and a second foot assembly. The handle assembly is connected to a first joint element, the first foot assembly is connected to a second joint element, and the second foot assembly is connected to a third joint element.

13. The child vehicle according to claim 12, characterized in that, The child carrier has an unfolded state and a folded state. When the stroller switches from the unfolded state to the folded state, the handle assembly and the first foot assembly rotate toward the second foot assembly.

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