Mechanism for preventing wheelchair from being unfolded after being folded

Abstract

The utility model discloses a mechanism for preventing a wheelchair from being opened after being folded, which comprises a wheelchair frame, the wheelchair frame comprises a seat bracket and rear wheel brackets, the rear wheel brackets are rotatably arranged on the two sides of the seat bracket, a lock column is formed on one side of each rear wheel bracket, and the lock column is arranged on the other side of each rear wheel bracket; a folding state or an unfolding state is formed by changing the rotating relation between the wheelchair frames; the locking switch is used for locking the folding state and comprises a pull rod and lock catches, the pull rod is arranged between the two lock catches, the lock catches are rotationally arranged on the two sides of the bottom of the seat support, and the lock catches are matched with the lock columns in the folding state.

Description

Technical Field

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

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

[0003] For example, the folding wheelchair proposed in the publication number CN212816832U realizes folding or unfolding through the sliding of multiple support rods and chutes. However, this type of electric wheelchair often does not design an anti-opening mechanism in the folded state. When lifting the folded electric wheelchair, users may cause the mechanism to unfold due to lifting it without being familiar with the folded state of the wheelchair, posing a safety hazard. Therefore, it is particularly important to design an anti-opening switch in the folded state that is not easily accidentally touched.

[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 an anti-opening mechanism for a wheelchair after folding 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 seat support and a rear wheel support. The rear wheel support is rotatably provided on both sides of the seat support, and a locking post is formed on one side of the rear wheel support. The folding state or the unfolded state is formed by changing the rotational relationship between the wheelchair frames; a locking switch for locking the folded state, including a pull rod and a lock catch. The pull rod is provided between the two lock catches, and the lock catches are rotatably provided on both sides of the bottom of the seat support. In the folded state, the lock catches cooperate with the locking posts.

[0007] In some embodiments, one end of the rear wheel support is rotatably provided with a front wheel support.

[0008] In some embodiments, the front wheel support is provided with oppositely distributed rotating parts, and pedal parts are rotatably provided at both ends of the rotating parts. In the folded state, one end of the pedal part abuts against the bottom of the seat support.

[0009] In some embodiments, the maximum rotation distance of the pedal part is limited by the front wheel support.

[0010] In some embodiments, a U-shaped groove is formed in the latch. In the folded state, the U-shaped groove abuts against the top of the locking post.

[0011] In some embodiments, the wheelchair frame further includes a backrest bracket, one end of the backrest bracket is provided with an auxiliary wheel, and in the folded state, the auxiliary wheel and the rear wheel rotatably provided on the rear wheel bracket keep the wheelchair frame perpendicular to the ground.

[0012] The beneficial effects of the present application are as follows: in the folded state, the wheelchair frame will be perpendicular to the ground under the action of the rear wheel and the auxiliary wheel. Therefore, the latch can abut against the locking post under the action of gravity to fix the rear wheel bracket, which can effectively prevent the wheelchair frame from disengaging from the folded state. When the folded wheelchair frame is placed flat, the pedal part will also abut against the seat frame under the action of gravity to prevent the latch from disengaging from the locking post due to some external forces. Description of the Drawings

[0013] In order 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 It is a three-dimensional schematic diagram of the folded state of the present application.

[0015] Figure 2 It is a three-dimensional schematic diagram of the locking switch in the folded state of the present application.

[0016] Figure 3 It is Figure 2 a partial enlarged schematic diagram of part A of

[0017] Figure 4 It is a three-dimensional schematic diagram of the unfolded state of the present application.

[0018] Figure 5 It is Figure 4 a partial enlarged schematic diagram of part A of

[0019] Explanation of the reference numerals in the drawings: 1, wheelchair frame; 11, seat bracket; 12, rear wheel bracket; 121, locking post; 13, front wheel bracket; 131, rotating part; 132, rear wheel; 14, pedal part; 15, backrest bracket; 151, auxiliary wheel; 2, locking switch; 21, pull rod; 22, latch; 221, U-shaped groove. Detailed 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 the technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of the 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 an anti-opening mechanism for a wheelchair after folding, mainly including: a wheelchair frame 1, including a seat bracket 11 and a rear-wheel bracket 12. The rear-wheel bracket 12 is rotatably arranged on both sides of the seat bracket 11. A locking post 121 is formed on one side of the rear-wheel bracket 12. The folding state or the unfolded state is formed by changing the rotational relationship between the wheelchair frames 1; a locking switch 2 for locking the folding state, including a pull rod 21 and a lock catch 22. The pull rod 21 is arranged between the two lock catches 22. The lock catches 22 are rotatably arranged on both sides of the bottom of the seat bracket 11. In the folding state, the lock catches 22 cooperate with the locking post 121.

[0022] Refer to Figure 5 As shown, when the wheelchair frame 1 is in the unfolded state, the lock catch 22 is always away from the locking post 121 and there is no direct contact.

[0023] Refer to Figure 3 As shown, when the wheelchair frame 1 enters the folding state, the locking post 121 will approach the lock catch 22 under the rotation of the rear-wheel bracket 12. When it is completely in the folding state, rotate the locking switch 2 to lock the locking post 121, so that the rear-wheel bracket 12 cannot rotate to restore the unfolded state. Lift the locking switch 2 to complete the unlocking.

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

[0025] Refer to Figure 1As shown, one end of the rear wheel bracket 12 is rotatably provided with a front wheel bracket 13. The front wheel bracket 13 is provided with oppositely distributed rotating parts 131. Both ends of the rotating parts 131 are rotatably provided with pedal parts 14. In the folded state, one end of the pedal part 14 abuts against the bottom of the seat bracket 11. With this setting, the pedal part 14 in the folded state can wrap the locking switch 2, playing a role in protecting the locking switch 2 from the lock catch 22 disengaging from the lock post 121 due to some external force.

[0026] Specifically, in order to enable the pedal part 14 to simultaneously support the feet and protect the locking switch 2 in the folded state, the maximum rotation distance of the pedal part 14 is limited by the front wheel bracket 13.

[0027] Preferably, with this setting, the locking switch 2 can smoothly slide the lock post 121 into the U-shaped groove 221 during rotation and will not disengage under the action of gravity. The U-shaped groove 221 is opened on the lock catch 22. In the folded state, the U-shaped groove 221 abuts against the top of the lock post 121.

[0028] Preferably, the wheelchair frame 1 further includes a backrest bracket 15. One end of the backrest bracket 15 is provided with an auxiliary wheel 151. The auxiliary wheel 151 in the folded state and the rear wheels rotatably provided on the rear wheel bracket 12 keep the wheelchair frame 1 perpendicular to the ground. With this setting, it is convenient for the movement and placement of the wheelchair frame 1 in the folded state, and can make the center of gravity of components such as the locking switch 2 downward, facilitating folding.

[0029] 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 here based on the above description.

[0030] 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 rear anti-opening mechanism for a wheelchair, characterized in that: include: A wheelchair frame, comprising a seat frame and a rear wheel frame, wherein the rear wheel frame is rotatably arranged on both sides of the seat frame, a locking column is formed on one side of the rear wheel frame, and a folding state or an unfolding state is formed by changing the rotational relationship between the wheelchair frame; The locking switch is used to lock the folded state, and comprises a pull rod and a lock buckle. The pull rod is arranged between two lock buckles, and the lock buckles are rotatably arranged on both sides of the bottom of the seat support. In the folded state, the lock buckles cooperate with the lock column.

2. The folding rear anti-opening mechanism of a wheelchair according to claim 1, characterized in that: One end of the rear wheel bracket is rotatably provided with a front wheel bracket.

3. The folding rear anti-opening mechanism of a wheelchair according to claim 2, characterized in that: The front wheel bracket is provided with rotating parts distributed opposite to each other, and pedal parts are rotatably provided at both ends of the rotating parts. In the folded state, one end of the pedal part abuts against the bottom of the seat bracket.

4. The folding rear anti-opening mechanism of a wheelchair according to claim 3, characterized in that: The maximum rotation distance of the pedal portion is limited by the front wheel bracket.

5. The folding rear anti-opening mechanism of a wheelchair according to claim 1, characterized in that: The lock buckle is provided with a U-shaped groove, and in the folded state, the U-shaped groove abuts against the top of the lock column.

6. The folding rear anti-opening mechanism of a wheelchair according to claim 1, characterized in that: The wheelchair frame also includes a backrest bracket, one end of which is provided with an auxiliary wheel. In a folded state, the auxiliary wheel and the rear wheel rotatably arranged on the rear wheel bracket make the wheelchair frame perpendicular to the ground.

Images