Bicycle folding joint, foldable frame and child carrier
By designing the folding joint, the hinged connection of the base, swing arm, and linkage components solves the problem of space occupation and hand clamping gap during the folding or unfolding of the child vehicle frame, achieving a compact layout and synchronous movement of the components.
Patent Information
- Application Number
- CN202520278170.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-20
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-02-20
AI Technical Summary
The existing child vehicle frames have large rotating joints during folding or unfolding, and the movement of transmission components takes up space and is prone to causing hand pinching gaps, indicating room for improvement.
The vehicle adopts a retractable joint, including a base, a first swing arm and a second swing arm. Through the hinged cooperation of the first linkage and the second linkage, the rotation constraint and synchronous movement of the components are realized, thus optimizing the layout.
It achieves a compact layout of child vehicle components, reduces the risk of fingers being pinched during movement, and provides greater design flexibility.
Smart Images
Figure CN223864929U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of child vehicles, and in particular to a folding joint, a foldable frame, and a child vehicle. Background Technology
[0002] Child vehicles are primarily used outdoors and during travel to transport goods or carry children. For ease of storage and transport, existing child vehicles generally include a frame that can be folded and unfolded, and a seat mounted on the frame. During folding or unfolding, the various components of the frame move relative to each other.
[0003] To constrain and synchronize the movement of components, existing technologies often require concentrating the components into one or more rotary joints and setting transmission components between them. This arrangement results in larger rotary joint dimensions, the transmission components occupying space during their travel, and the potential for hand-clamping gaps during movement, indicating room for improvement. Utility Model Content
[0004] To address the aforementioned technical problems, one embodiment of this application discloses a retraction joint, comprising:
[0005] The base has a first axis.
[0006] The first swing arm and the second swing arm, each swing arm includes a rotating part that rotates relative to the first axis and a connecting part that is eccentrically disposed relative to the rotating part;
[0007] The first linkage component includes a first synchronization end and a first linkage end for hinged to the connecting part of the second swing arm;
[0008] The second linkage component includes a second synchronization end and a second linkage end for hinged to the connecting part of the first swing arm, wherein the first synchronization end and the second synchronization end are hinged together.
[0009] When the first swing arm rotates relative to the base, the connecting part of the first swing arm drives the second linkage to move, and the second linkage drives the second swing arm to move synchronously through the first linkage.
[0010] 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.
[0011] In one embodiment, the base is provided with a first shaft hole for providing the first axis, and the rotating part of the first swing arm and the rotating part of the second swing arm are rotatably engaged with the first shaft hole.
[0012] In one embodiment, the rotating portion of the first swing arm and the rotating portion of the second swing arm are respectively rotatably engaged with both ends of the first shaft hole.
[0013] In one embodiment, the first swing arm and the second swing arm are respectively disposed on both sides of the base. The first linkage member is disposed on the same side as the first swing arm and the first linkage end is used to hinge with the connecting part of the second swing arm on the other side. The second linkage member is disposed on the same side as the second swing arm and the second linkage end is used to hinge with the connecting part of the first swing arm on the other side. When the first swing arm rotates relative to the base, the connecting part of the first swing arm drives the second linkage member located on its opposite side to move.
[0014] In one embodiment, the base is further provided with:
[0015] A first guide groove extends around the first shaft hole, and the first synchronous end of the first linkage member is hinged to the connecting part of the second swing arm through the first guide groove.
[0016] The second guide groove extends around the first shaft hole and is disposed opposite to the first guide groove. The second synchronous end of the second linkage member is hinged to the connecting part of the first swing arm through the second guide groove.
[0017] The third guide groove is provided in the radial direction of the first shaft hole, and the first linkage end of the first linkage member is hinged to the second linkage end of the second linkage member through the third guide groove.
[0018] In one embodiment, the base includes a disc for providing the first shaft hole, the first guide groove and the second guide groove, and an extension eccentrically disposed relative to the disc, wherein at least a portion of the third guide groove is located on the extension.
[0019] In one embodiment, the base, the first swing arm, and the second swing arm are plate-shaped, and the first swing arm and the second swing arm are respectively attached to the base from both sides or located on the same side of the base.
[0020] In one embodiment, the connecting part of the first swing arm is provided with a second shaft hole, the second linkage end is provided with a third shaft hole, and the two are hinged by a first guide pin that is slidably disposed in the second guide groove.
[0021] The second swing arm has a fourth shaft hole on its connecting part and a fifth shaft hole on its first linkage end. The two are hinged together by a second guide pin that is slidably disposed in the first guide groove.
[0022] The first synchronization end is provided with a sixth shaft hole, the second synchronization end is provided with a seventh shaft hole, and the two are hinged by a third guide pin that is slidably disposed in the third guide groove;
[0023] The first swing arm has an eighth shaft hole on its rotating part, and the second swing arm has a ninth shaft hole on its rotating part. The two swing arms are rotatably connected to the first shaft hole via a rotating shaft.
[0024] In one embodiment, the retractable joint has a relatively extended state and a folded state;
[0025] In the unfolded state, the connecting portions of the first swing arm and the second swing arm extend parallel to each other and intersect the extending direction of the extension portion of the base;
[0026] In the folded state, the connecting portions of the first swing arm and the second swing arm approach each other on both sides of the extension.
[0027] In one embodiment, each of the linkages is arc-shaped, and in the unfolded state, each of the linkages surrounds the rotating portion of the swing arm on the corresponding side.
[0028] One embodiment of this application also discloses a foldable frame, comprising:
[0029] According to the retraction joint described in the above technical solution of this application,
[0030] A push handle; the bottom of the push handle is connected to any one of the base, the first swing arm, and the second swing arm.
[0031] The front and rear foot posts are used for walking, and the tops of the front and rear foot posts are connected to the base, the first swing arm, and the other two of the second swing arm.
[0032] The locking mechanism has a relative locked state and an unlocked state. In the locked state, the locking mechanism is used to maintain the spatial position of each component.
[0033] One embodiment of this application also discloses a child vehicle, including a foldable frame as described in the above technical solution of this application and a support device disposed on the frame.
[0034] The technical solution disclosed in this application optimizes the mechanism of the retraction joint, which can simultaneously achieve rotational constraints on components, linkage of mutual movements, and compact layout, providing greater design space for the overall improvement of child vehicles.
[0035] The specific beneficial technical effects will be further explained in the specific implementation methods in conjunction with the specific structures or steps. Attached Figure Description
[0036] Figure 1 This is a schematic diagram of the retraction joint structure in one embodiment of this application;
[0037] Figure 2 for Figure 1 A top-down view of the retraction joint in the middle;
[0038] Figure 3 for Figure 1 A schematic diagram of the explosion at the end of the train;
[0039] Figure 4 for Figure 1 A frontal view of the retraction joint in the middle;
[0040] Figure 5 This is a schematic diagram of the structure of the folded-down joint.
[0041] Figure 6 for Figure 5 A frontal view of the retraction joint in the middle;
[0042] Figure 7 for Figure 5 A top-down view of the retraction joint in the middle;
[0043] Figure 8 for Figure 5 A schematic diagram of the side view of the retraction joint.
[0044] The annotations in the figure are explained as follows:
[0045] 100. Base; 101. First axis; 102. First shaft hole; 103. Disc; 104. Extension; 110. First guide groove; 120. Second guide groove; 130. Third guide groove;
[0046] 201. First swing arm; 202. Second swing arm; 210. Rotating part; 211. Eighth shaft hole; 212. Ninth shaft hole; 220. Connecting part; 221. Second shaft hole; 222. Fourth shaft hole;
[0047] 300, First linkage component; 310, First synchronization end; 311, Sixth shaft hole; 320, First linkage end; 321, Fifth shaft hole;
[0048] 400, Second linkage component; 410, Second synchronization end; 411, Seventh shaft hole; 420, Second linkage end; 421, Third shaft hole. Detailed Implementation
[0049] 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.
[0050] 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.
[0051] 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.
[0052] Reference Appendix Figure 1 To be continued Figure 4 As shown, one embodiment of this application discloses a folding joint, including a base 100, a first swing arm 201 and a second swing arm 202 rotatably mounted on the base 100, and a first linkage member 300 and a second linkage member 400 hinged to each other. The technical solution disclosed in this application, through the optimization of the folding joint mechanism, can simultaneously achieve rotational constraints on components, linkage of their mutual movements, and a compact layout, providing greater design space for the overall improvement of child vehicles.
[0053] In terms of functionality, the first swing arm 201 and the second swing arm 202 can be located on the same side of the base 100 or on opposite sides of the base 100, meaning this application does not limit the order in which the base 100, the first swing arm 201, and the second swing arm 202 are attached. For a more concise description, see attached... Figure 1 To be continued Figure 4An exemplary embodiment is shown in which a first swing arm 201 and a second swing arm 202 are respectively disposed on both sides of a base 100. In this embodiment, the base 100 is provided with a first axis 101, and each swing arm includes a rotating part 210 that rotates relative to the first axis 101 and a connecting part 220 that is eccentrically disposed relative to the rotating part 210. A first linkage member 300 is disposed on the same side as the first swing arm 201, and the first linkage member 300 includes a first synchronization end 310 and a first linkage end 320 for hinged to the connecting part 220 of the second swing arm 202 on the other side. A second linkage member 400 is disposed on the same side as the second swing arm 202, and the second linkage member 400 includes a second synchronization end 410 and a second linkage end 420 for hinged to the connecting part 220 of the first swing arm 201 on the other side, and the first synchronization end 310 and the second synchronization end 410 are hinged together. When the first swing arm 201 rotates relative to the base 100, the connecting portion 220 of the first swing arm 201 drives the second linkage 400 located on its opposite side to move. The second linkage 400 drives the second swing arm 202 to move synchronously through the first linkage 300. Similarly, when the second swing arm 202 rotates relative to the base 100, the connecting portion 220 of the second swing arm 202 drives the first linkage 300 located on its opposite side to move. The first linkage 300 drives the first swing arm 201 to move synchronously through the second linkage 400. That is, the first swing arm 201 and the second swing arm 202 can move synchronously in both directions.
[0054] Based on the above, and in conjunction with the conventional setting of the base 100, the first swing arm 201 and the second swing arm 202 avoiding each other's movement strokes, those skilled in the art can undoubtedly conclude that the technical solution of the first swing arm 201 and the second swing arm 202 being located on the same side of the base 100, which will not be elaborated here.
[0055] The purpose of the coordinated movement of each component is to achieve different spatial postures of the retraction joint. (See attached diagram.) Figure 1 Appendix Figure 2 and appendix Figure 5 Appendix Figure 7 In the illustrated embodiment, the retractable joint has a relatively extended state and a retracted state.
[0056] Combined with appendix Figure 1 To be continued Figure 4 As shown, in the unfolded state, the connecting portion 220 of the first swing arm 201 and the second swing arm 202 extends parallel to each other and intersects the extension direction of the extension portion 104 of the base 100. For example, the connecting portion 220 of the first swing arm 201 and the second swing arm 202 is collinear and perpendicular to the extension direction of the extension portion 104 of the base 100.
[0057] Combined with appendix Figure 5 To be continued Figure 8As shown, in the folded state, the connecting portions 220 of the first swing arm 201 and the second swing arm 202 approach each other on both sides of the extension 104. The connecting portions 220 of the first swing arm 201 and the second swing arm 202, and the extension 104 extend in essentially the same direction to facilitate the mutual approach of the components. For example, the angle between the extension directions of each pair is less than or equal to 45 degrees. In the height direction of the lateral projection (e.g., attached) Figure 8 In the vertical direction (as shown in the image), the dimensions of both the first swing arm 201 and the second swing arm 202 are smaller than the dimensions of the base 100; in the width direction of the lateral projection (e.g., attached) Figure 7 (in the left and right directions), the overall size L1 of the retractable joint is approximately equal to the diameter D1 of the disc 103 portion of the base 100, and the ratio of L1 to D1 ranges from 0.8 to 1.5.
[0058] The first swing arm 201 and the second swing arm 202 are located on both sides of the base 100, which optimizes the layout and effectively improves space utilization. The linkage and cooperation between the components can be achieved by bypassing the side edge of the base 100, or the base 100 can be provided with a clearance structure that allows relative movement of the components to achieve linkage and cooperation. Furthermore, the clearance structure can also guide the movement of the components, for example, by... Figure 3 In the embodiment shown, the base 100 is provided with:
[0059] The first guide groove 110 extends around the first shaft hole 102 for providing the first axis 101, and the first synchronous end 310 of the first linkage 300 is hinged to the connecting portion 220 of the second swing arm 202 through the first guide groove 110.
[0060] The second guide groove 120 extends around the first shaft hole 102, and the second synchronous end 410 of the second linkage 400 is hinged to the connecting part 220 of the first swing arm 201 through the second guide groove 120.
[0061] The third guide groove 130 is located radially in the first shaft hole 102, and the first linkage end 320 of the first linkage member 300 is hinged to the second linkage end 420 of the second linkage member 400 through the third guide groove 130.
[0062] The movement of the first linkage 300 is constrained by the first guide groove 110 and the third guide groove 130, and the movement of the second linkage 400 is constrained by the second guide groove 120 and the third guide groove 130. That is, the base 100 realizes the movement constraints of the first swing arm 201, the second swing arm 202, the first linkage 300 and the second linkage 400 through the first shaft hole 102, the first guide groove 110, the second guide groove 120 and the third guide groove 130.
[0063] For the layout of each guide groove, refer to the attached diagram. Figure 3 and attached Figure 4In the illustrated embodiment, the base 100 includes a disc 103 for providing a first shaft hole 102, a first guide groove 110, and a second guide groove 120, and an extension 104 eccentrically disposed relative to the disc 103. The first guide groove 110 and the second guide groove 120 are respectively disposed on both sides of the first shaft hole 102 and are arranged opposite to each other. The first guide groove 110 and the second guide groove 120 are located on an arc of the same radius relative to the first axis 101, and the sum of the central angles of the first guide groove 110 and the second guide groove 120 is less than 355 degrees. At least a portion of the third guide groove 130 is located on the extension 104. Furthermore, the third guide groove 130 extends linearly in the extending direction of the extension 104 and the extending direction passes through the first axis 101.
[0064] To prevent the linkage components from affecting the cooperation between the swing arms and the base 100 during movement, each linkage component can be partially or entirely non-coplanar relative to the corresponding side swing arm to achieve avoidance. Alternatively, as shown in the embodiment in Figure 4, each linkage component is arc-shaped to avoid the corresponding side swing arm. Furthermore, the retractable joint has a relatively extended state and a folded state. In the extended state, each linkage component surrounds the rotating part 210 of the corresponding side swing arm to further improve the cooperation between the components.
[0065] There are various ways to connect the components. For example, as mentioned above, the hinge between two components can be achieved by opening a mating hole in one component, and a part of the other component rotating and fitting into the mating hole. The part rotating and fitting into the mating hole can be integrally formed with the corresponding component or assembled separately. The hinge between two components can also be achieved by opening mating holes in both components and using a mating part to simultaneously fit into the mating holes on both components. For example, in this embodiment, the connecting part 220 of the first swing arm 201 is provided with a second shaft hole 221, and the second linkage end 420 is provided with a third shaft hole 421, and the two are hinged by a first guide pin (not shown) slidably disposed in the second guide groove 120. The connecting part 220 of the second swing arm 202 is provided with a fourth shaft hole 222, and the first linkage end 320 is provided with a fifth shaft hole 321, and the two are hinged by a second guide pin (not shown) slidably disposed in the first guide groove 110. The first synchronizing end 310 has a sixth shaft hole 311, and the second synchronizing end 410 has a seventh shaft hole 411. The two are hinged together by a third guide pin (not shown) that is slidably disposed in the third guide groove 130. The base 100 has a first shaft hole 102 for providing the first axis 101, the rotating part 210 of the first swing arm 201 has an eighth shaft hole 211, and the rotating part 210 of the second swing arm 202 has a ninth shaft hole 212. The two are rotatably engaged with the first shaft hole 102 by a rotating shaft (not shown), and the two are respectively located at both ends of the first shaft hole 102.
[0066] The embodiments in this application also provide optimized solutions for the shape of each component. (See attached document.) Figure 2 Appendix Figure 7 and appendix Figure 8 In the illustrated embodiment, the base 100, the first swing arm 201, and the second swing arm 202 are plate-shaped. The first swing arm 201 and the second swing arm 202 abut against the base 100 from both sides or on the same side of the base 100, respectively. The first swing arm 201 and the second swing arm 202 move on a plane of motion parallel to both or on a plane parallel to the end face of the base 100 on the corresponding side to switch between different states. Furthermore, the first linkage 300 and the second linkage 400 are plate-shaped components. The mutually abutting components can reduce the joint dimensions in the direction of the first axis 101 while satisfying the motion relationship, thereby facilitating the overall layout and optimized setting of the frame.
[0067] In conjunction with the above, one embodiment of this application also discloses a foldable frame, including a folding joint according to the above-described technical solution of this application and various components connected by the folding joint. The folding joint in this application can be applied to any part of the frame where any component moves relative to each other, such as a part where two or three components move relative to each other. For example, the frame in this embodiment includes two side frames and a crossbar disposed between the side frames, wherein the folding joint is used to constrain the movement between the push handle, front foot bar, and rear foot bar of a single side frame. The bottom of the push handle is connected to any one of the base 100, the first swing arm 201, and the second swing arm 202, and the tops of the front foot bar and the rear foot bar used for walking are connected to the other two of the base 100, the first swing arm 201, and the second swing arm 202. Similar to the different states of the folding joint, the frame also has corresponding folded and unfolded states, therefore the frame also includes a locking mechanism, which has a relative locked state and an unlocked state. In the locked state, the locking mechanism is used to maintain the spatial position of each component. The locking mechanism can be located within the retraction joint or in other locations, such as between components connected to the retraction joint. Other implementation details of the frame can be implemented using existing technology and will not be elaborated here.
[0068] Furthermore, one embodiment of this application also discloses a child vehicle, including a foldable frame according to the above-described technical solution of this application and a support device disposed on the frame. The support device can be in various forms such as a seat, sleeping frame, or platform for children to sit or lie down. The support device can be detachably installed on the frame and / or deform synchronously with different states of the frame. In embodiments where the support device can deform, the folding joint mentioned above can be used not only for the movement and coordination of various components on the frame, but also for the support device or the connection structure between the frame and the support device. Other implementation details of the child vehicle can be implemented in conjunction with existing technology, and will not be elaborated here.
[0069] The technical features of the embodiments described above 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.
[0070] The embodiments described above are merely examples of several implementation methods of this application, and while the descriptions are relatively specific and detailed, 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 retractable joint, characterized in that, include: The base has a first axis. The first swing arm and the second swing arm, each swing arm includes a rotating part that rotates relative to the first axis and a connecting part that is eccentrically disposed relative to the rotating part; The first linkage component includes a first synchronization end and a first linkage end for hinged to the connecting part of the second swing arm; The second linkage component includes a second synchronization end and a second linkage end for hinged to the connecting part of the first swing arm, wherein the first synchronization end and the second synchronization end are hinged together. When the first swing arm rotates relative to the base, the connecting part of the first swing arm drives the second linkage to move, and the second linkage drives the second swing arm to move synchronously through the first linkage.
2. The retraction joint according to claim 1, characterized in that, The base is provided with a first shaft hole for providing the first axis, and the rotating part of the first swing arm and the rotating part of the second swing arm are rotatably engaged with the first shaft hole.
3. The retraction joint according to claim 2, characterized in that, The base is also provided with: A first guide groove extends around the first shaft hole, and the first synchronous end of the first linkage member is hinged to the connecting part of the second swing arm through the first guide groove. The second guide groove extends around the first shaft hole and is disposed opposite to the first guide groove. The second synchronous end of the second linkage member is hinged to the connecting part of the first swing arm through the second guide groove. The third guide groove is provided in the radial direction of the first shaft hole, and the first linkage end of the first linkage member is hinged to the second linkage end of the second linkage member through the third guide groove.
4. The retraction joint according to claim 3, characterized in that, The base includes a disc for providing the first shaft hole, the first guide groove and the second guide groove, and an extension eccentrically disposed relative to the disc, wherein at least a portion of the third guide groove is located on the extension.
5. The retraction joint according to claim 4, characterized in that, The base, the first swing arm, and the second swing arm are plate-shaped, and the first swing arm and the second swing arm are respectively attached to the base from both sides or located on the same side of the base.
6. The retraction joint according to claim 5, characterized in that, The first swing arm has a second shaft hole on its connecting part and a third shaft hole on its second linkage end, and the two are hinged by a first guide pin that is slidably disposed in the second guide groove. The second swing arm has a fourth shaft hole on its connecting part and a fifth shaft hole on its first linkage end. The two are hinged together by a second guide pin that is slidably disposed in the first guide groove. The first synchronization end is provided with a sixth shaft hole, the second synchronization end is provided with a seventh shaft hole, and the two are hinged by a third guide pin that is slidably disposed in the third guide groove; The first swing arm has an eighth shaft hole on its rotating part, and the second swing arm has a ninth shaft hole on its rotating part. The two swing arms are rotatably connected to the first shaft hole via a rotating shaft.
7. The retraction joint according to claim 1, characterized in that, The retractable joint has a relatively extended state and a folded state; In the unfolded state, the connecting portions of the first swing arm and the second swing arm extend parallel to each other and intersect the extending direction of the extension portion of the base; In the folded state, the connecting portions of the first swing arm and the second swing arm approach each other on both sides of the extension.
8. The retraction joint according to claim 7, characterized in that, Each of the linkage components is arc-shaped, and in the unfolded state, each of the linkage components surrounds the rotating part of the swing arm on the corresponding side.
9. A foldable frame, characterized in that, include: The retraction joint according to any one of claims 1 to 8, A push handle; the bottom of the push handle is connected to any one of the base, the first swing arm, and the second swing arm. The front and rear foot posts are used for walking, and the tops of the front and rear foot posts are connected to the base, the first swing arm, and the other two of the second swing arm. The locking mechanism has a relative locked state and an unlocked state. In the locked state, the locking mechanism is used to maintain the spatial position of each component.
10. A child vehicle, characterized in that, It includes the foldable frame as claimed in claim 9 and the support device disposed on the frame.