A connecting structure of a wheelchair leg rest and a wheelchair front fork

Abstract

The utility model discloses a connecting structure of wheelchair leg support and wheelchair front fork relates to wheelchair accessory technical field, it includes connecting main body, sets up the support mechanism in the inside of connecting main body and sets up the antiskid mechanism in the outside of connecting main body, the support mechanism includes the U type support piece fixed in the connecting main body inner wall clamping groove through the inlaying mode, the antiskid mechanism includes the boss of integrative forming in the outer wall of connecting main body, the utility model discloses through inside metal support piece and outside antiskid structure cooperation, has solved the technical problem that the current plastic connecting piece is insufficient in strength, easy to fatigue deformation and not wear -resisting, has the significant beneficial effect with high structural strength, safe and reliable, wear -resisting, long service life.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair accessories technology, and in particular to a connection structure between a wheelchair leg rest and a wheelchair fork. Background Technology

[0002] Wheelchairs are a common mode of transportation for people with mobility impairments. The leg rest provides leg support and is a crucial component for ensuring comfort and safety. To facilitate getting in and out of the wheelchair and adapt to different usage scenarios, wheelchair leg rests are typically designed to rotate and adjust around the front fork. The key to achieving this functionality lies in the connecting assembly that links the leg rest to the front fork.

[0003] In existing technologies, these connecting components are generally manufactured using monolithic injection molding of engineering plastics to achieve lightweighting and reduced manufacturing costs. While this offers advantages in production efficiency and weight control, its inherent drawbacks have gradually become apparent during actual use. As a core load-bearing component that supports the user's leg weight and undergoes frequent rotational operations, the structural strength and durability of the connecting component are of paramount importance.

[0004] When the connecting components are subjected to static pressure from the user's legs for extended periods, stress concentrates at critical connection points, easily leading to material creep and plastic deformation. Over time, this can cause the connecting components to sag or break, posing a serious safety hazard. Furthermore, when the user folds up or unfolds the leg rest, the connecting components need to rotate around the metal wheelchair fork. The limiting structures on these components inevitably experience repeated impacts and friction with the metal parts of the fork. Because engineering plastics are far less hard and wear-resistant than metals, this long-term fatigue wear can cause the limiting parts of the connecting components to wear out rapidly, resulting in inaccurate positioning, wobbling, and ultimately significantly shortening the product's lifespan. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a connection structure for wheelchair leg rests and wheelchair forks, aiming to improve the problems of insufficient structural strength, easy plastic deformation, poor wear resistance, and short service life of the connection components of wheelchair leg rests and wheelchair forks in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a connection structure for a wheelchair leg rest and a wheelchair fork, comprising a connecting body; a support mechanism disposed inside the connecting body; and an anti-slip mechanism disposed outside the connecting body.

[0007] The support mechanism includes a U-shaped support member, and the inner wall of the connecting body is provided with a slot for accommodating the U-shaped support member.

[0008] The anti-slip mechanism includes a second boss integrally formed on the outer wall of the connecting body, and the U-shaped support is fixed in the slot by fitting, thereby forming an integral connecting assembly with internal reinforcing ribs and external anti-slip function.

[0009] Preferably, both sides of the U-shaped support are fixed with connectors, and the U-shaped support is fitted into the slot through the connectors to achieve a more stable locking.

[0010] Preferably, the outer wall of the connecting body is also provided with an adjustment hole, which is connected to the front fork connection hole and is used to cooperate with the limiting structure on the wheelchair front fork to guide and limit the rotational stroke of the connecting component.

[0011] Preferably, the connecting body is also provided with an adapter hole adjacent to the leg support connecting hole, which is used to fit against the surface of the leg support component during installation, so as to increase the contact area and connection stability.

[0012] Further preferably, a boss is provided on one side of the adapter hole to provide additional support for the leg support component and prevent it from deflecting when subjected to force.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, a metal U-shaped support is first set inside the connecting body and fitted and fixed with the groove on the inner wall of the connecting body to form an internal reinforcement structure, which improves the overall structural strength and load-bearing capacity of the connecting component, effectively prevents the connecting body from plastic deformation or fracture under long-term stress, and significantly enhances the safety and reliability of the product.

[0015] 2. In this utility model, when the connecting assembly is rotated and adjusted, the internal support component avoids direct friction between the connecting body, which serves as the base, and the metal limiting component on the wheelchair fork. This transfers the wear stress to the high-strength metal support component, thereby significantly reducing fatigue wear in key parts and extending the service life of the entire connecting assembly. Attached Figure Description

[0016] Figure 1 This is a perspective view of a connection structure between a wheelchair leg rest and a wheelchair fork proposed in this utility model.

[0017] Figure 2 This is a bottom schematic diagram of the connection structure between a wheelchair leg rest and a wheelchair fork proposed in this utility model;

[0018] Figure 3 This is an exploded view of the connector of the connection structure between the wheelchair leg rest and the wheelchair fork proposed in this utility model.

[0019] Legend:

[0020] 1. Connecting components; 101. Connecting body; 102. Leg support connecting hole; 103. Adjustment hole; 104. Adaptor hole; 105. Boss one; 106. Front fork connecting hole; 2. Anti-slip mechanism; 201. Boss two; 3. Support mechanism; 301. U-shaped support; 302. Slot; 303. Connector. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Reference Figures 1-3 This utility model provides an embodiment of a connection structure between a wheelchair leg rest and a wheelchair fork, which aims to solve the problems of insufficient strength and easy fatigue deformation during rotational adjustment of existing wheelchair leg rest connection structures. The structure of the connection component 1 includes a connection body 101, on which a fork connection hole 106 for rotatably connecting with the wheelchair fork and a leg rest connection hole 102 for fixedly connecting with the wheelchair leg rest are provided. In order to improve the overall structural strength and durability of the connection component 1, a support mechanism 3 is also provided inside the connection component 1, and an anti-slip mechanism 2 is provided on its outside.

[0023] Specifically, the inner wall of the connecting body 101 is machined with a slot 302, and the support mechanism 3 includes a metal U-shaped support 301. Connectors 303 are installed on both sides of the U-shaped support 301 by a fixed connection. The entire U-shaped support 301 is firmly installed in the slot 302 of the connecting body 101 by the connectors 303 on both sides in a fitting manner. This structural design utilizes the high strength characteristics of the U-shaped support 301 to greatly enhance the deformation resistance of the connecting body 101 when bearing load.

[0024] Reference Figure 1 and Figure 2 The anti-slip mechanism 2 includes a boss 201, which is integrally formed with the outer wall of the connecting body 101. The boss 201 is located below the leg support connecting hole 102 and is used to continuously contact the bottom of the tube wall of the leg support after the leg support is installed, so as to provide operation damping and anti-slip function.

[0025] In order to realize the storage and unfolding functions of the leg rest, an adjustment hole 103 is also provided on the outer wall of the connecting body 101. The adjustment hole 103 is connected to the inner cavity of the front fork connecting hole 106 and is used to slide with the limiting structure of the front fork outer wall to realize the limiting rotation of the connecting component 1 relative to the front fork.

[0026] To further enhance the stability of the connection with the leg support, the connecting body 101 is also provided with an adapter hole 104. The adapter hole 104 is located near the leg support connection hole 102. A boss 105 is integrally formed on one side of the adapter hole 104. The adapter hole 104 and the boss 105 work together to provide a more stable fit and support when assembled with the leg support component, and to prevent angular deformation of the connection part.

[0027] During assembly, the wheelchair fork is passed through the fork connection hole 106 of the connecting body 101, so that the connecting component 1 is fitted onto the fork. At this time, a limiting structure on the outer wall of the fork will slide and engage with the adjusting hole 103 of the connecting body 101, thereby realizing the axial limiting and circumferential rotation adjustment of the connecting component 1 on the fork. Then, the wheelchair leg rest is fixedly connected to the leg rest connection hole 102 of the connecting body 101. During the connection process, the tube of the leg rest fits tightly with the adapter hole 104 and the first boss 105, while the bottom of the leg rest contacts the second boss 201. In use, when the leg rest is in the unfolded position and bears the weight of the user's legs, When the load is transmitted through the connecting body 101, the U-shaped support 301 is embedded inside the connecting body 101, providing strong mechanical support for the connecting body 101 and effectively preventing plastic deformation or breakage. When the leg rest needs to be stored, the connecting assembly 1 can be rotated upwards. The guiding effect of the adjusting hole 103 makes the rotation process smooth and has a clear limit position. During the rotation, the internal U-shaped support 301 avoids direct friction between the plastic material of the connecting body 101 and the metal limiting structure on the fork, reducing material fatigue wear and extending the service life of the connecting assembly 1.

[0028] The connecting component 1 is the overall assembly that connects the leg rest and the front fork; the connecting body 101 serves as the basic component, supporting and integrating all other mechanisms and parts of the connecting component 1; the leg rest connection hole 102 is a through hole on the connecting body 101, used to fix the wheelchair leg rest in place with fasteners; the adjustment hole 103 is a slot on the outer wall of the connecting body 101, used to slide and engage with the limiting block on the wheelchair front fork to guide and limit the rotation angle of the connecting component 1; the adapter hole 104 is a recessed structure on the connecting body 101, used to fit against the surface of the leg support component during installation to increase the contact area and stability; the boss 105 is a raised structure that engages with the adapter hole 104, used to further enhance the support for the leg support component; the front fork connection hole 106 is a central hole penetrating the connecting body 101, used to fit onto the wheelchair front fork; the anti-slip mechanism 2 is a functional structure located on the outside of the connecting body 101, used to provide operational damping;

[0029] The boss 201 serves as a concrete implementation of the anti-slip mechanism 2. Its raised surface contacts the bottom of the leg support, achieving anti-slip and damping effects through friction. The support mechanism 3 is a reinforcing structure embedded inside the connecting body 101, used to enhance mechanical strength. The U-shaped support 301, as the core of the support mechanism 3, bears most of the load due to its high strength characteristics. The slot 302 is a groove machined on the inner wall of the connecting body 101, used to accurately accommodate and position the U-shaped support 301. The connector 303 is a structure fixed on the U-shaped support 301, used to firmly lock the U-shaped support 301 in the slot 302.

[0030] Regarding the specific material selection for the connecting body 101, those skilled in the art can select engineering plastic injection molding according to strength requirements. For the U-shaped support 301, steel or aluminum alloy can be selected. The specific manufacturing process and material selection are well-known technologies in the field and will not be elaborated here.

[0031] Working principle: First, the connecting component 1 is fitted onto the front fork of the wheelchair through its front fork connection hole 106. The limiting block on the front fork slides into the adjustment hole 103 of the connecting body 101, completing axial positioning and circumferential rotational engagement. Then, the leg rest is fixedly connected to the leg rest connection hole 102. At this time, the tube wall of the leg rest is tightly fitted with the adapter hole 104 and the first boss 105, and its bottom contacts the second boss 201 of the anti-slip mechanism 2. When the leg rest is extended to bear the weight of the human leg, the load is transmitted through the connecting body 101. At this time, the U-shaped support 301 embedded in the slot 302 inside the connecting body 101 bears most of the stress. Its high-strength metal material effectively prevents the base material from being damaged. The connecting body 101 undergoes plastic deformation or fracture, thus solving the problem of insufficient strength of the connecting parts in the prior art. When the connecting assembly 1 needs to be rotated to store or unfold the leg rest, the cooperation between the adjustment hole 103 and the front fork limit block guides the rotation trajectory of the entire assembly. During this process, the internal U-shaped support 301 isolates the direct metal-plastic friction between the connecting body 101 and the front fork limit block, greatly reducing the fatigue wear of the connecting body 101. Meanwhile, the external boss 201 provides a certain amount of damping during rotation, making the adjustment operation more stable and controllable. Finally, through the synergistic effect of internal support and external anti-slip, the connection structure is made robust and durable, and the user experience is excellent.

Claims

1. A connection structure between a wheelchair leg rest and a wheelchair front fork, comprising: The connecting component (1) includes a connecting body (101), which has a fork connecting hole (106) for the wheelchair fork to pass through and a leg support connecting hole (102) for the wheelchair leg support to connect to. Its characteristic is that: The connecting component (1) further includes a support mechanism (3) disposed inside the connecting body (101). The support mechanism (3) includes a U-shaped support member (301). A slot (302) is provided on the inner wall of the connecting body (101). The U-shaped support member (301) is fitted into the slot (302). The connecting component (1) further includes an anti-slip mechanism (2), which includes a boss (201) integrally formed on the outer wall of the connecting body (101).

2. The connection structure between a wheelchair leg rest and a wheelchair fork according to claim 1, characterized in that: Both sides of the U-shaped support (301) are fixed with connectors (303), and the U-shaped support (301) is fitted into the slot (302) through the connectors (303).

3. The connection structure between a wheelchair leg rest and a wheelchair fork according to claim 1, characterized in that: An adjustment hole (103) is also provided on the outer wall of the connecting body (101), and the adjustment hole (103) is connected to the fork connection hole (106).

4. The connection structure between a wheelchair leg rest and a wheelchair fork according to claim 1, characterized in that: An adapter hole (104) is also provided on the connecting body (101), and the adapter hole (104) is adjacent to the leg support connecting hole (102).

5. The connection structure between a wheelchair leg rest and a wheelchair fork according to claim 4, characterized in that: A boss (105) is also provided on one side of the adapter hole (104).

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