CN-121971248-A - Wheelchair self-locking structure and wheelchair

CN121971248ACN 121971248 ACN121971248 ACN 121971248ACN-121971248-A

Abstract

The embodiment of the application provides a wheelchair self-locking structure and a wheelchair, wherein the self-locking structure comprises a seat frame assembly and a self-locking piece, the seat frame assembly is used for supporting a seat cushion and comprises at least one first supporting piece, the self-locking piece is provided with a first connecting part, a second connecting part and a third connecting part, the first connecting part, the second connecting part and the third connecting part are respectively connected with a backrest, the first supporting piece and a rear frame, and a clamping part between the second connecting part and the third connecting part, when the seat cushion of the wheelchair is loaded, the seat frame assembly moves downwards under the action of gravity, so that the clamping part of the first supporting piece and the self-locking piece is driven to form automatic clamping. According to the application, the self-locking piece is introduced into the traditional structure, the self-gravity of a user is utilized to trigger locking, and the self-gravity triggering locking device is not required to depend on the driving force of the user, so that when the main locking mechanism fails accidentally, the backrest is effectively prevented from tilting forwards, the use safety and reliability of the folding wheelchair are greatly improved, and the self-gravity triggering locking device is particularly suitable for weak or disabled users.

Inventors

WANG XIAODONG
ZHANG JIANSHE
ZHANG XUNYIN
LI KAI
QU JIAYOU
ZHOU CHENGYAN

Assignees

江苏邦邦智能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260318

Claims (10)

1. A wheelchair self-locking structure, comprising: the seat frame assembly is arranged below the wheelchair cushion and used for supporting the wheelchair cushion, and comprises at least one first supporting piece arranged at intervals along a first direction; the self-locking piece comprises a first connecting part, a second connecting part, a third connecting part and a clamping part, wherein the first connecting part is connected with the backrest of the wheelchair, the second connecting part is connected with the first supporting piece, and the third connecting part is connected with the rear frame of the wheelchair; when the wheelchair cushion bears load, the seat frame component is forced to move downwards to drive the first support piece to form clamping connection with the clamping part.
2. The wheelchair self-locking structure of claim 1 wherein the bezel assembly further comprises a second support disposed in parallel with the first support; The first support piece is provided with a first connecting lug, the second support piece is provided with a second connecting lug, and the second connecting part is connected with the first connecting lug.
3. The wheelchair self-locking structure of claim 2 further comprising a connector having one end connected to the second connector lug and the other end connected to the wheelchair rear frame; when the first supporting piece is clamped with the self-locking piece, the self-locking piece is abutted to the upper portion of the connecting piece.
4. The wheelchair self-locking structure of claim 3 wherein the second connection portion is connected to the first connection ear via a first shaft and the connection member is connected to the second connection ear via a second shaft.
5. The wheelchair self-locking structure of any one of claims 2-4 wherein the bezel assembly further comprises third and fourth supports disposed in parallel along a second direction perpendicular to the first direction, the third and fourth supports each being for connecting the first and second supports.
6. The wheelchair self-locking structure of claim 5 wherein the first support, the second support, the third support and the fourth support are each a support bar structure.
7. The wheelchair self-locking structure of claim 5 wherein the first support, the second support, the third support and the fourth support comprise a rectangular frame.
8. The wheelchair self-locking structure of claim 5 wherein the self-locking member further comprises a fourth connection portion located below the engagement portion, the fourth connection portion being connected to the wheelchair rear frame by a latch member.
9. The wheelchair self-locking structure of claim 8 wherein the self-locking member is a plate-like structure; The first connecting part, the second connecting part, the third connecting part and the fourth connecting part are respectively a first through hole, a second through hole, a third through hole and a fourth through hole which are formed in the self-locking piece along the first direction; the clamping part is a groove formed in the self-locking piece, and the opening direction of the groove faces to the first supporting piece.
10. Wheelchair, characterized in that it comprises a wheelchair self-locking structure according to any one of claims 1 to 9.

Description

Wheelchair self-locking structure and wheelchair Technical Field The application relates to the technical field of medical equipment, in particular to a wheelchair self-locking structure and a wheelchair. Background Wheelchairs are a mobility aid for special people such as disabled people, elderly people, medical clinical rehabilitation patients and the like, and are widely used because of being foldable, portable and small in occupied space. In the related art solutions, the locking mechanism of the conventional wheelchair fails to maintain the stability of the backrest when the user needs to apply a lateral force against the backrest through the back, i.e. to apply a lateral force to the wheelchair backrest, which force is dependent on the strength level of the wheelchair user himself. However, with the related art solutions, wheelchair users are usually disabled people, and lack sufficient strength, so that the wheelchair is disabled as a whole and cannot be used normally. Disclosure of Invention The embodiment of the application provides a wheelchair self-locking structure and a wheelchair, which are used for automatically utilizing the self gravity of a user to lock a backrest assembly when a main locking mechanism fails, so that the wheelchair can be used safely and normally. In a first aspect, an embodiment of the present application provides a wheelchair self-locking structure, including: the seat frame assembly is arranged below the wheelchair cushion and used for supporting the wheelchair cushion, and comprises at least one first supporting piece arranged at intervals along a first direction; the self-locking piece comprises a first connecting part, a second connecting part, a third connecting part and a clamping part, wherein the first connecting part is connected with the backrest of the wheelchair, the second connecting part is connected with the first supporting piece, and the third connecting part is connected with the rear frame of the wheelchair; when the wheelchair cushion bears load, the seat frame component is forced to move downwards to drive the first support piece to form clamping connection with the clamping part. In one possible embodiment, the seat frame assembly further includes a second support member disposed in parallel with the first support member; The first support piece is provided with a first connecting lug, the second support piece is provided with a second connecting lug, and the second connecting part is connected with the first connecting lug. In one possible embodiment, the wheelchair further comprises a connecting piece, one end of the connecting piece is connected with the second connecting lug, and the other end of the connecting piece is connected with the wheelchair rear frame; when the first supporting piece is clamped with the self-locking piece, the self-locking piece is abutted to the upper portion of the connecting piece. In one possible embodiment, the second connection part is connected to the first connection lug via a first pivot shaft, and the connection part is connected to the second connection lug via a second pivot shaft. In one possible embodiment, along a second direction perpendicular to the first direction, the seat frame assembly further includes a third support and a fourth support disposed in parallel, each of the third support and the fourth support being configured to connect the first support and the second support. In one possible embodiment, the first support, the second support, the third support and the fourth support are all support bar structures. In one possible embodiment, the first support, the second support, the third support and the fourth support form a rectangular frame. In one possible embodiment, the self-locking member further comprises a fourth connecting portion, the fourth connecting portion is located below the clamping portion, and the fourth connecting portion is connected with the wheelchair rear frame through a latch member. In one possible embodiment, the self-locking element is a plate-like structure; The first connecting part, the second connecting part, the third connecting part and the fourth connecting part are respectively a first through hole, a second through hole, a third through hole and a fourth through hole which are formed in the self-locking piece along the first direction; the clamping part is a groove formed in the self-locking piece, and the opening direction of the groove faces to the first supporting piece. In a second aspect, embodiments of the present application provide a wheelchair comprising the wheelchair self-locking structure. Compared with the prior art, the application has the beneficial effects that: The application comprises a seat frame component and a self-locking piece, wherein the self-locking piece is provided with connecting parts respectively connected with the backrest, the first supporting piece and the rear frame, and a clamping part positioned between the connecting parts