Folding locking mechanism of wheelchair

Abstract

The utility model discloses a folding locking mechanism of a wheelchair, which comprises a wheelchair frame and a locking mechanism, the wheelchair frame comprises a backrest bracket and a support frame, the support frame is hinged with the backrest bracket, a limiting part is arranged on the support frame, and a folding state or an unfolding state is formed by changing the rotation relation between the wheelchair frames; the locking switch comprises a first base and a lock catch, the first base is installed on the backrest support, and the lock catch is rotationally arranged on the first base and used for being matched with the limiting part to lock the wheelchair frame in the unfolded state; the elastic assembly is arranged on the backrest support and used for supporting and damping the backrest support in the unfolded state.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a folding and locking mechanism for a wheelchair. Background Art

[0002] As a means of transportation for disabled and mobility-impaired individuals, some electric wheelchairs are designed with a folding mechanism to facilitate movement and transportation when not in use. Such electric wheelchairs are easy to carry and occupy little space.

[0003] For example, the folding wheelchair disclosed in the publication number CN212816832U locks the wheelchair in the unfolded state through a telescopic device. However, the locking structure of this type is relatively rigid. In the unfolded state, the structure of the wheelchair is completely fixed, which is not user-friendly for some users with poor lumbar and back conditions. Therefore, how to ensure the locking and comfort of the electric wheelchair in the unfolded state is the purpose of the present application.

[0004] The above content is only used to assist in understanding the technical solution of the present application, and does not represent an admission that the above content is the closest prior art to the present application. Summary of the Invention

[0005] Based on this, the present application provides a folding and locking mechanism for a wheelchair to solve one of the above technical problems.

[0006] The technical solution adopted by the present application to solve its technical problems includes: a wheelchair frame, including a backrest bracket and a support bracket, the support bracket is hinged to the backrest bracket, and a limiting portion is provided on the support bracket to form a folded state or an unfolded state by changing the rotational relationship between the wheelchair frames; a locking switch, including a first base and a lock catch, the first base is installed on the backrest bracket, the lock catch is rotatably arranged on the first base, and is used to cooperate with the limiting portion to lock the wheelchair frame in the unfolded state; an elastic component, arranged on the backrest bracket, and is used to support and shock-absorb the backrest bracket in the unfolded state.

[0007] In some embodiments, a first connection portion for cooperating with the support bracket to be hinged and a second connection portion for cooperating with the elastic component are formed on the backrest bracket.

[0008] In some embodiments, the elastic component includes a contact pin and a spring, the spring is sleeved on the contact pin and is fixedly connected to one end of the contact pin, the contact pin is slidably arranged on the second connection portion, and the spring is used to apply a force for continuously folding the backrest bracket in one direction in the unfolded state.

[0009] In some embodiments, a third connecting portion for cooperating with and hinging to the backrest bracket and an abutting plate for cooperating with the elastic component are formed on the support frame.

[0010] In some embodiments, the limiting portion includes a second base and a limiting rod. The second base is installed on the support frame, and the limiting rod is installed on the second base.

[0011] In some embodiments, the latch is integrally in an F shape and has an abutting section and a limiting section. In the unfolded state, the abutting section cooperates with and is clamped to the limiting rod, and the limiting section is used to limit the rotation range of the latch.

[0012] The beneficial effects of the present application are as follows: The cooperation between the latch and the limiting portion enables the wheelchair frame to be simply and effectively fixed in the unfolded state. The elastic component allows the user to tilt backward at a certain angle when applying force to the backrest bracket, which can effectively meet the needs of various people and improve the comfort during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 is a three-dimensional schematic diagram of the unfolded state of the present application.

[0015] Figure 2 is Figure 1 a partial enlarged schematic diagram of part A of

[0016] Figure 3 is a schematic diagram of the folded state of the present application.

[0017] Figure 4 is Figure 3 a partial enlarged schematic diagram of part A of

[0018] Figure 5 is a three-dimensional schematic diagram of the latch of the present application.

[0019] Explanation of the reference numerals in the drawings: 1, wheelchair frame; 11, backrest bracket; 111, first connecting portion; 112, second connecting portion; 12, support frame; 121, limiting portion; 1211, second base; 1212, limiting rod; 122, third connecting portion; 123, abutting plate; 2, locking switch; 21, first base; 22, latch; 221, abutting section; 222, limiting section; 3, elastic component; 31, abutting pin; 32, spring; 33, abutting portion; 34, limiting block. Specific Embodiments

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection of the present application.

[0021] In the embodiments of the present application, please refer to Figures 1-5 As shown, the present application provides a folding and locking mechanism for a wheelchair, mainly including: a wheelchair frame 1, including a backrest bracket 11 and a support frame 12, the support frame 12 is hinged to the backrest bracket 11, and a limiting portion 121 is provided on the support frame 12 to form a folded state or an unfolded state by changing the rotational relationship between the wheelchair frames 1; a locking switch 2, including a first base 21 and a lock catch 22, the first base 21 is installed on the backrest bracket 11, and the lock catch 22 is rotatably arranged on the first base 21 for cooperating with the limiting portion 121 to lock the wheelchair frame 1 in the unfolded state; an elastic component 3, arranged on the backrest bracket 11 for supporting and damping the backrest bracket 11 in the unfolded state.

[0022] As Figure 2 shown, in the unfolded state, by rotating the locking switch 2 to cooperate the locking switch 2 with the limiting portion 121, and the elastic component 3 causes the backrest bracket 11 to continuously fold in one direction, while the lock catch 22 always cooperates with the limiting portion 121, making the maximum rotation range of the backrest bracket 11 limited. While providing a damping effect for the backrest bracket 11, the locking structure remains stable. When the user leans on the backrest frame, the elastic component 3 will be squeezed, causing the backrest frame to rotate backward by a certain distance and making the locking switch 2 not in contact with the limiting portion 121. At this time, the locking switch 2 can be unlocked. When the user leaves the backrest frame, the spring 32 loses the compressive force and starts to rebound, causing the locking switch 2 to continue to abut against the limiting portion 121 to lock.

[0023] As Figure 4 shown, in the folded state, the locking switch 2 and the elastic component 3 cannot interfere with the support frame 12.

[0024] Next, some preferred / improved embodiments based on the above embodiments will be further described. Any one or a combination of multiple of the following embodiments can be selected.

[0025] Specifically, in order to enable the backrest bracket 11 to cooperate with the support bracket 12 in a linkage manner, a first connecting portion 111 that is hinged to the support bracket 12 and a second connecting portion 112 that cooperates with the elastic component 3 are formed on the backrest bracket 11.

[0026] Refer to Figure 2 As shown, the elastic component 3 includes a contact pin 31 and a spring 32. The spring 32 is sleeved on the contact pin 31 and fixedly connected to one end of the contact pin 31. The contact pin 31 is slidably disposed on the second connecting portion 112. The spring 32 is used to apply a force for the backrest bracket 11 to continuously fold in one direction in the unfolded state. Such a setting ensures that the pin does not interfere with the compression of the spring 32.

[0027] Specifically, a contact portion 33 is provided at one end of the contact pin 31 for cooperation with the support bracket 12. At the same time, in order to prevent the spring 32 from detaching from the contact pin 31, a limiting block 34 is detachably provided at the other end of the contact pin 31 where the contact portion 33 is provided. The limiting block 34 always abuts against the second connecting portion 112 under normal conditions to limit the movement range of the contact pin 31 and prevent the contact pin 31 from detaching from the second connecting portion 112 in the folded state.

[0028] Specifically, in order to enable the support bracket 12 to cooperate with the backrest bracket 11 in a linkage manner, a third connecting portion 122 that is hinged to the backrest bracket 11 and a contact plate 123 that cooperates with the elastic component 3 are formed on the support bracket 12.

[0029] Refer to Figure 5. In order to enable the lock 22 to cooperate with the limiting rod 1212 in the unfolded state, the limiting portion 121 includes a second base 1211 and a limiting rod 1212. The second base 1211 is installed on the support bracket 12, and the limiting rod 1212 is installed on the second base 1211.

[0030] Preferably, the lock 22 is integrally in an F shape and is formed with a contact section 221 and a limiting section 222. In the unfolded state, the contact section 221 is engaged and clamped with the limiting rod 1212, and the limiting section 222 is used to limit the rotation range of the lock 22. Such a setting enables the lock 22 to more effectively abut against the limiting rod 1212 in the unfolded state.

[0031] Specifically, the abutting section 221 can effectively prevent the limiting rod 1212 from slipping on the abutting section 221 during normal use. During the rotation of the lock 22, the limiting section 222 can prevent the lock 22 from continuing to move in the locking direction, preventing the lock 22 from falling off or being damaged when the user needs to restore the folding state to the unfolded state due to the contact between the lock 22 and the support rod.

[0032] So far, various embodiments of the present application have been described in detail. To avoid obscuring the concept of the present application, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0033] Finally, it should be noted that the above are only the preferred embodiments of the present application. The foregoing embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present application.

Claims

1. A folding and locking mechanism for a wheelchair, characterized in that Comprising: A wheelchair frame, including a backrest support and a support frame, the support frame is hinged to the backrest support, and a limiting portion is provided on the support frame, and the folding state or the unfolded state is formed by changing the rotational relationship between the wheelchair frames; A locking switch, including a first base and a latch, the first base is installed on the backrest support, and the latch is rotatably arranged on the first base for cooperating with the limiting portion to lock the wheelchair frame in the unfolded state; An elastic component, arranged on the backrest support, for supporting and damping the backrest support in the unfolded state.

2. The folding and locking mechanism of a wheelchair according to claim 1, characterized in that, A first connecting portion for cooperating with the support frame to be hinged and a second connecting portion for cooperating with the elastic component are formed on the backrest support.

3. The folding and locking mechanism of a wheelchair according to claim 2, characterized in that, The elastic component includes a contact pin and a spring, the spring is sleeved on the contact pin and fixedly connected to one end of the contact pin, the contact pin is slidably arranged on the second connecting portion, and the spring is used to apply a force for continuously folding the backrest support in one direction in the unfolded state.

4. The folding and locking mechanism of a wheelchair according to claim 1, characterized in that, A third connecting portion for cooperating with the backrest support to be hinged and a contact plate for cooperating with the elastic component are formed on the support frame.

5. The folding and locking mechanism of a wheelchair according to claim 1, characterized in that, The limiting portion includes a second base and a limiting rod, the second base is installed on the support frame, and the limiting rod is installed on the second base.

6. The folding and locking mechanism of a wheelchair according to claim 5, characterized in that, The latch is integrally in an F shape and has a contact section and a limiting section. In the unfolded state, the contact section cooperates with the limiting rod to be clamped, and the limiting section is used to limit the rotation range of the latch.

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