CN219662107U

CN219662107U - Folding mechanism for wheelchair

Info

Publication number: CN219662107U
Application number: CN202321393570.2U
Authority: CN
Inventors: 王建芬
Original assignee: Foshan Nanhai Deyang Creative Rehabilitation Equipment Co ltd
Current assignee: Foshan Nanhai Deyang Creative Rehabilitation Equipment Co ltd
Priority date: 2023-06-02
Filing date: 2023-06-02
Publication date: 2023-09-12
Anticipated expiration: 2033-06-02

Abstract

The utility model provides a folding mechanism for a wheelchair, which comprises a backrest frame and a bottom frame, wherein the backrest frame is connected with the bottom frame through a connecting sheet with an L-shaped structure, one end of the connecting sheet is hinged with the backrest frame, and the other end of the connecting sheet is hinged with the bottom frame; the utility model has the advantages that the switch piece with the L-shaped structure is hinged below the backrest frame, and the clamping groove is formed at the other end of the switch piece, so that the utility model has simple design structure and convenient use, the left-right folding structure in the prior art is replaced by adopting a front-back folding mode, the integral structural design of the seat is reserved, the seat is also designed to be a structure which is folded from the middle, and uncomfortable problems can not exist when a patient sits on the seat; and when folding, can not be because wheel and ground are rubbed and cause the problem of being hard, when expanding, the spring can stimulate the switch piece and lock on horizontal pole one automatically, realizes locking, has labour saving and time saving, simple operation's advantage.

Description

Folding mechanism for wheelchair

Technical Field

The utility model relates to the technical field of folding wheelchair design, in particular to a folding mechanism for a wheelchair.

Background

The folding wheelchair is a riding-instead tool for special people such as disabled people, elderly people, medical clinical rehabilitation patients and the like, and is widely applied because of being foldable, portable and small in occupied space.

The existing folding wheelchairs mostly adopt a left-right folding mode, namely an operator holds two armrests of the wheelchairs by two hands, and after unlocking, the two hands control the armrests to move to the middle position, so that the folding effect of the wheelchairs is achieved. However, the folding mechanism of the wheelchair has the following problems in practical use: 1. because the wheelchair is folded towards the middle position, the wheelchair needs to design the seat to be of a middle foldable structure, which causes uncomfortable problems when a patient sits on the seat, and the seat cushion needs to be taken out when the seat cushion is arranged on the seat, so that the experience is poor; 2. the wheelchair needs to be folded in the middle, so that the wheels on one side are required to be separated from the ground and then folded in the folding process, otherwise, the problem of labor-consuming caused by friction between the wheels and the ground in the folding process can occur, and the operation is inconvenient; 3. after the wheelchair is unfolded from the folded state, the wheelchair is prevented from being changed into the folded state by being locked manually, and the wheelchair has the problem of complex operation.

Disclosure of Invention

The utility model provides a folding mechanism for a wheelchair, which solves the problems of uncomfortable sitting and poor experience caused by the folding structure of the seat in the prior art, and has the problems of labor-consuming, inconvenient operation and complex operation in the folding and unfolding processes.

The technical scheme of the utility model is realized as follows:

a folding mechanism for a wheelchair comprises a backrest frame and a bottom frame, wherein the backrest frame is connected with the bottom frame through a connecting sheet of an L-shaped structure, one end of the connecting sheet is hinged with the backrest frame, and the other end of the connecting sheet is hinged with the bottom frame; a switch sheet with an L-shaped structure is hinged below the backrest frame, a clamping groove is formed in the other end of the switch sheet, and the clamping groove can be clamped at one position of a cross rod on the underframe, so that the wheelchair is in an unfolding state; when the clamping groove is separated from the first cross rod on the underframe, the underframe can rotate relative to the backrest frame, so that the folding work of the wheelchair is realized.

Preferably, the middle part of the switch sheet is connected with a spring, the upper end of the spring is connected to the backrest frame, and when the wheelchair is in an unfolding state, the spring is in an extension state.

Preferably, a positioning groove is formed in the middle of the switch sheet, and the root of the positioning groove can be clung to a second cross rod in the middle of the backrest frame when the wheelchair is in an unfolding state.

Preferably, the middle position of the backrest frame is hinged with a seat frame, the front part of the seat frame is hinged with a front frame, the lower part of the front frame is hinged with a connecting rod with an L-shaped structure, and the other end of the connecting rod is hinged on the backrest frame.

Preferably, the upper part of the underframe is hinged with the seat frame, and the hinge axis is coincident with the hinge axis of the seat frame and the front frame.

Preferably, a limit groove is formed in a position, close to the front, below the connecting sheet, and the root of the limit groove is clung to the first cross rod of the underframe in the unfolded state of the wheelchair.

Preferably, the number of the connecting pieces is two, and the connecting pieces are symmetrical to each other relative to the center of the wheelchair.

Preferably, the number of the switch sheets is two, the two switch sheets are symmetrical relative to the center of the wheelchair, and a pull rod is connected between the two switch sheets.

By adopting the technical scheme, the utility model has the beneficial effects that:

the utility model has simple design structure and convenient use, adopts a front-back folding mode to replace a left-right folding structure in the prior art, retains the overall structural design of the seat, and can avoid the problem that a patient cannot feel uncomfortable when sitting on the seat due to the fact that the seat is also designed to be folded from the middle; and when folding, can not be because wheel and ground are rubbed and cause the problem of being hard, when expanding, the spring can stimulate the switch piece and lock on horizontal pole one automatically, realizes locking, has labour saving and time saving, simple operation's advantage.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained according to these drawings without inventive faculty for a person skilled in the art.

FIG. 1 is a perspective view of the wheelchair of the present utility model;

FIG. 2 is an enlarged view of a portion of FIG. 1 in accordance with the present utility model;

FIG. 3 is a schematic perspective view of the present utility model;

FIG. 4 is an exploded view of the present utility model;

FIG. 5 is a partial structural view of the present utility model;

FIG. 6 is a perspective view of the switch sheet of the present utility model;

fig. 7 is a perspective view of the connecting piece of the present utility model.

Wherein:

1. a backrest frame; 101. a second cross bar; 2. a mounting; 3. a chassis; 301. a first cross bar; 4. a front frame; 5. a connecting rod; 6. a connecting sheet; 7. a switch sheet; 701. a clamping groove; 702. a connection hole; 703. a positioning groove; 8. a pull rod; 801. a limit groove; 9. a spring; 10. and a rear wheel.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in the figure, the folding mechanism for the wheelchair comprises a backrest frame 1 and a bottom frame 3, wherein the backrest frame 1 is provided with two mutually parallel upright rods, and the lower parts of the two upright rods are connected through a cross rod II 101; the whole chassis 3 is H-shaped structure, and middle fixedly connected with horizontal pole one 301.

The backrest frame 1 is connected with the underframe 3 through a connecting sheet 6 with an L-shaped structure, one end of the connecting sheet 6 is hinged with the backrest frame 1, and the other end of the connecting sheet is hinged with the underframe 3; a switch sheet 7 with an L-shaped structure is hinged below the backrest frame 1, a clamping groove 701 is formed at the other end of the switch sheet 7, and the clamping groove 701 can be clamped at a first cross rod 301 on the underframe 3 to enable the wheelchair to be in an unfolding state; when the clamping groove 701 is separated from the first cross rod 301 on the underframe 3, the underframe 3 can rotate relative to the backrest frame 1, so that the folding work of the wheelchair is realized.

Specifically, the middle part of switch piece 7 is connected with spring 9, and this spring 9 is the extension spring, and wherein, connecting hole 702 has been seted up at switch piece 7 middle part, and the connecting hole 702 department is connected to spring 9 lower extreme, and the upper end of spring 9 is connected on back frame 1, more specifically, the pin joint position at back frame 1 and connecting rod 5 is connected to the upper end of spring 9, and when the wheelchair was in the state of expanding, spring 9 was the extension state, and the one end that switch piece 7 was close to draw-in groove 701 has the trend of upward movement all the time under the effect of spring 9 tensile force to make draw-in groove 701 card establish on horizontal pole one 301 all the time under the wheelchair state of expanding.

Specifically, a positioning groove 703 is provided in the middle of the switch sheet 7, and when the wheelchair is in a deployed state, the root of the positioning groove 703 can be tightly attached to the second cross bar 101 in the middle of the backrest frame 1, that is, in the wheelchair deployed state, the chassis 3 and the backrest frame 1 always maintain a relatively stationary state under the action of the switch sheet 7.

Specifically, the middle position of the backrest frame 1 is hinged with a seat frame 2, the front of the seat frame 2 is hinged with a front frame 4, the lower position of the front frame 4 is hinged with a connecting rod 5 with an L-shaped structure, the other end of the connecting rod 5 is hinged on the backrest frame 1, a plane four-bar mechanism is formed among the seat frame 2, the front frame 4, the connecting rod 5 and the backrest frame 1, folding activities can be carried out among the four members in an unlocking state, the underframe 3 can be used as a locking mechanism of the plane four-bar mechanism, when the underframe 3 and the four members are kept relatively stationary, the locking of the plane four-bar mechanism can be realized, in the example, the underframe 3 and the backrest frame 1 are locked by adopting a switch piece 7, and the folding and unfolding of the wheelchair are realized by controlling the position of the switch piece 7.

Specifically, the upper part of the underframe 3 is hinged with the seat frame 2, and the hinge axis is coincident with the hinge axis of the seat frame 2 and the front frame 4.

Specifically, a limit groove 801 is formed at a position near the front position below the connecting piece 6, in the wheelchair unfolding state, the root of the limit groove 801 is clung to the first cross rod 301 of the chassis 3, in the wheelchair unfolding process, the limit groove 801 of the connecting piece 6 is also in an active state, and when the limit groove 801 is clung to the first cross rod 301, the wheelchair is unfolded to a limit state.

Specifically, the number of the connecting pieces 6 is two, and the connecting pieces are symmetrical to each other with respect to the center of the wheelchair.

Specifically, the number of the switch pieces 7 is two, the two switch pieces 7 are symmetrical relative to the center of the wheelchair, a pull rod 8 is connected between the two switch pieces 7, and one end of a clamping groove 701 of the switch piece 7 can be controlled to move downwards by pulling the pull rod 8, so that unlocking is realized.

In addition, in this example, the rear wheel 10 is installed below the chassis 3, the front wheel is installed below the front frame 4, the pedal is installed in front of the front frame 4, and the armrests and the push rods are installed on the backrest frame 1, which are all conventional designs in the prior art, and are not described in detail herein.

Working principle: when the wheelchair is in an unfolding state, as shown in fig. 1-3 and 5, the switch sheet 7 is clamped on the first cross rod 301 in the middle of the chassis 3 through the clamping groove 701 under the action of the tension of the spring 9, in this state, the root of the positioning groove 703 in the middle of the switch sheet 7 is attached to the second cross rod 101 of the backrest frame 1, so that the chassis 3 is in a fixed state relative to the backrest frame 1, meanwhile, the inner wall of the limiting groove 801 below the connecting sheet 6 is attached to the first cross rod 301 of the chassis 3, and thus, after a user sits on the seat frame 2, the first cross rod 301 on the seat frame 2 can play a supporting role, so that the whole structure of the wheelchair is stable;

when the wheelchair is folded, a user only needs to pull the pull rod 8 downwards, so that one end of the switch piece 7, which is close to the first cross rod 301, moves downwards, and the clamping groove 701 and the first cross rod 301 are separated from each other, so that unlocking can be realized. After unlocking, the front end of the seat frame 2 is turned upwards to replace the existing left-right folding mode, so that the front frame 4, the underframe 3 and the connecting rod 5 are driven to fold, the problem that the folding process is labor-consuming due to friction between wheels and the ground is avoided, and in the process, the backrest frame 1 can be kept in an upright state all the time, so that a wheelchair can be conveniently moved under the action of the rear wheels 10. When the switch is unfolded, the seat frame 2 is only required to be turned downwards, and the clamping groove 701 of the switch piece 7 can be automatically formed on the first cross rod 301 under the action of the plane four-bar mechanism and the spring 9, so that the switch is convenient and quick.

In this example, the L-shaped structure is not limited to the standard right-angle structure, and the specific structure is shown in the accompanying drawings.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A folding mechanism for a wheelchair, characterized by: the novel backrest comprises a backrest frame (1) and a bottom frame (3), wherein the backrest frame (1) is connected with the bottom frame (3) through a connecting sheet (6) with an L-shaped structure, one end of the connecting sheet (6) is hinged with the backrest frame (1), and the other end of the connecting sheet is hinged with the bottom frame (3); a switch sheet (7) with an L-shaped structure is hinged below the backrest frame (1), a clamping groove (701) is formed in the other end of the switch sheet (7), and the clamping groove (701) can be clamped at a first cross rod (301) on the underframe (3) to enable the wheelchair to be in an unfolding state; when the clamping groove (701) is separated from the first cross rod (301) on the underframe (3), the underframe (3) can rotate relative to the backrest frame (1) to realize folding work of the wheelchair.

2. A folding mechanism for a wheelchair in accordance with claim 1, wherein: the middle part of the switch sheet (7) is connected with a spring (9), the upper end of the spring (9) is connected to the backrest frame (1), and when the wheelchair is in an unfolding state, the spring (9) is in an extending state.

3. A folding mechanism for a wheelchair in accordance with claim 1, wherein: and a positioning groove (703) is formed in the middle of the switch sheet (7), and when the wheelchair is in an unfolding state, the root of the positioning groove (703) can be clung to a second cross rod (101) in the middle of the backrest frame (1).

4. A folding mechanism for a wheelchair in accordance with claim 1, wherein: the middle position of the backrest frame (1) is hinged with a seat frame (2), the front of the seat frame (2) is hinged with a front frame (4), the lower part of the front frame (4) is hinged with a connecting rod (5) with an L-shaped structure, and the other end of the connecting rod (5) is hinged on the backrest frame (1).

5. A folding mechanism for a wheelchair as claimed in claim 4, wherein: the upper part of the underframe (3) is hinged with the seat frame (2), and the hinge axis is coincident with the hinge axis of the seat frame (2) and the front frame (4).

6. A folding mechanism for a wheelchair in accordance with claim 1, wherein: a limit groove (801) is formed in a position, close to the front, below the connecting sheet (6), and the root of the limit groove (801) is tightly attached to a first cross rod (301) of the underframe (3) in the wheelchair unfolding state.

7. A folding mechanism for a wheelchair in accordance with claim 1, wherein: the number of the connecting pieces (6) is two, and the connecting pieces are symmetrical relative to the center of the wheelchair.

8. A folding mechanism for a wheelchair in accordance with claim 1, wherein: the number of the switch pieces (7) is two, the two switch pieces (7) are symmetrical relative to the center of the wheelchair, and a pull rod (8) is connected between the two switch pieces (7).