CN210078087U

CN210078087U - Wheelchair backrest folding and unlocking mechanism

Info

Publication number: CN210078087U
Application number: CN201920510430.6U
Authority: CN
Inventors: 谢空成
Original assignee: Jiangsu Fuwei Health Technology Co Ltd
Current assignee: Changzhou Aoxiang Intelligent Technology Co ltd
Priority date: 2019-04-16
Filing date: 2019-04-16
Publication date: 2020-02-18
Anticipated expiration: 2029-04-16

Abstract

The utility model discloses a folding release mechanism of wheelchair back belongs to wheelchair technical field. The utility model discloses a folding release mechanism of wheelchair back locates the revolute joint department of back assembly on the wheelchair, including drawing the button, reset spring and gland, the revolute joint of back assembly on the wheelchair include the dabber and with dabber rotary fit's sleeve pipe, sheathed tube outside end has only the revolving stage, draw button axial sliding to install in the spindle, the gland is fixed in the tip of dabber, reset spring is located the gland and draws between the button, draw the button to compress tightly on only the revolving stage under reset spring effect, and have unsmooth complex rotation stopping mechanism on drawing the button and only the cooperation terminal surface of revolving stage. The utility model discloses a folding release mechanism of back utilizes the unsmooth compact structure of back revolute joint department to realize revolute joint's locking or unblock, and structural design is simple ingenious, and easy operation is convenient, has greatly made things convenient for the quick folding of wheelchair back to wheelchair back support nature after the locking is strong, and is firm reliable.

Description

Wheelchair backrest folding and unlocking mechanism

Technical Field

The utility model relates to a wheelchair structure, more specifically say, relate to a folding release mechanism of wheelchair back.

Background

According to investigation, the number of paralyzed or mobility-impaired patients is large due to various traffic accidents and various diseases every year, and the number of elderly people with mobility-impaired people is increasing year by year with the increasing degree of social aging. Most of these mobility-impaired patients and the elderly need to rely on wheelchairs to assist them in their daily activities.

In the use process of the wheelchair, the wheelchair is often carried for travel, the backrest of the wheelchair occupies approximately half of the height of the wheelchair, so that the backrest of the wheelchair needs to be designed into a foldable structure, and particularly for an electric wheelchair, the backrest of the wheelchair cannot be folded laterally, and the folding design of the backrest is more important. Among the existing wheelchairs, there is no wheel chair with a backrest folding function, such as the one disclosed in chinese patent No. ZL 201620877267.3: a folding mechanism of a wheel chair backrest and a Chinese patent number ZL201710846127.9 disclose names as follows: although the prior art can also realize the folding of the backrest of the wheelchair, the structure design is relatively complex, and the unlocking operation is relatively complex.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims to overcome current wheelchair back adjustment mechanism and have that the structure is complicated, complex operation etc. not enough, provide a folding release mechanism of wheelchair back, adopt the technical scheme of the utility model, the folding release mechanism of back utilizes the unsmooth structure of agreeing with of back revolute joint department to realize revolute joint's locking or unblock, and structural design is simple ingenious, and easy operation is convenient, has greatly made things convenient for the quick folding of wheelchair back to wheelchair back support nature after the locking is strong, and is firm reliable.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a folding release mechanism of backrest locates the revolute joint department of backrest assembly on the wheelchair, and this folding release mechanism of backrest is including drawing button, reset spring and gland, the revolute joint of backrest assembly on the wheelchair include the dabber and with dabber normal running fit's sleeve pipe, sheathed tube outside end have and end the revolving stage, draw the button to install in the spindle to with dabber axial sliding connection, the gland be fixed in the tip of dabber, reset spring be located the gland and draw between the button, draw the button compress tightly on ending the revolving stage under the reset spring effect, and have unsmooth complex rotation stopping mechanism on drawing the button and ending the terminal surface of revolving stage.

Furthermore, the rotation stopping mechanism comprises at least one groove arranged on the end surface of the rotation stopping table and a convex block arranged on the end surface of the pull button and matched with the groove.

Furthermore, the rear portion of the pull button is provided with a stepped hole capable of accommodating a return spring and a gland, the return spring is sleeved on a mandrel penetrating out of the pull button, the gland is fixed at the end of the mandrel through a locking nut, and the return spring is kept in the stepped hole.

Furthermore, the pull button is connected with the mandrel in a key mode.

Furthermore, the outer wall of the pull button is also provided with a ring groove convenient for pulling.

Furthermore, the mandrel is arranged at the rear part of a frame or a cushion assembly of the wheelchair, and the sleeve is arranged on the backrest assembly.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a wheelchair backrest folding unlocking mechanism, it locates the revolute joint department of backrest assembly on the wheelchair, including drawing the button, reset spring and gland, the revolute joint of backrest assembly on the wheelchair includes dabber and the sleeve pipe with dabber rotary fit, the outside end of sleeve pipe has the only revolving stage, draw the button to install on the dabber, and with dabber axial sliding connection, the gland is fixed in the tip of dabber, reset spring is located between gland and the drawing the button, the drawing the button compresses tightly on the only revolving stage under the reset spring effect, and have unsmooth complex only revolving mechanism on drawing the button and only revolving stage's cooperation terminal surface; the backrest folding and unlocking mechanism realizes locking or unlocking of the rotary joint by utilizing a concave-convex wedged structure at the rotary joint of the backrest, has simple and ingenious structural design and simple and convenient operation, greatly facilitates quick folding of the wheelchair backrest, and the locked wheelchair backrest has strong support, stability and reliability;

(2) the utility model discloses a wheelchair backrest folding and unlocking mechanism, the rotation stopping mechanism comprises at least one groove arranged on the end surface of the rotation stopping platform and a lug arranged on the end surface of the pull button and matched with the groove, which is convenient for processing and manufacturing each part of the wheelchair backrest folding and unlocking mechanism;

(3) the utility model discloses a folding release mechanism of wheelchair back, its rear portion that draws the button has the shoulder hole that can hold reset spring and gland, and the reset spring cover is established at the dabber of wearing out the button, and the gland passes through lock nut to be fixed at the tip of dabber, keeps reset spring inside the shoulder hole, and simple structure is compact, the nimble operation of being convenient for.

Drawings

Fig. 1 is a schematic view of an installation structure of a wheelchair backrest folding and unlocking mechanism of the present invention in a wheelchair;

FIG. 2 is a schematic view of a partially enlarged structure of the exploded state at K in FIG. 1;

fig. 3 is a schematic sectional structure view of the wheelchair backrest folding and unlocking mechanism of the present invention.

The reference numerals in the schematic drawings illustrate:

1. a frame; 2. a front wheel; 3. a rear wheel; 4. a cushion assembly; 4-1, mandrel; 5. a backrest assembly; 5-1, sleeving; 5-2, a rotation stopping table; 5-3, a groove; 6. a backrest folding and unlocking mechanism; 6-1, pulling a button; 6-2, bumps; 6-3, stepped holes; 6-4, a return spring; 6-5, pressing cover; 6-6, locking a nut; 7. a handrail.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

Referring to fig. 1, 2 and 3, a wheelchair backrest folding and unlocking mechanism of the present embodiment is provided at a rotary joint of a backrest assembly 5 on a wheelchair, the backrest assembly 5 can be folded by rotating the rotary joint, and a backrest folding and unlocking mechanism 6 can lock or unlock and fold the backrest assembly 5 at an unfolded position. The backrest folding and unlocking mechanism 6 comprises a pull button 6-1, a return spring 6-4 and a gland 6-5, a rotary joint of the backrest assembly 5 on the wheelchair comprises a mandrel 4-1 and a sleeve 5-1 which is rotationally matched with the mandrel 4-1, the outer side end of the sleeve 5-1 is provided with a stop rotating table 5-2, the pull button 6-1 is arranged on the mandrel 4-1, and is axially connected with the mandrel 4-1 in a sliding way, the gland 6-5 is fixed at the end part of the mandrel 4-1, the reset spring 6-4 is positioned between the gland 6-5 and the pull button 6-1, the pull button 6-1 is pressed on the rotation stopping table 5-2 under the action of the reset spring 6-4, and the matching end surface of the pull button 6-1 and the rotation stopping table 5-2 is provided with a rotation stopping mechanism in concave-convex matching. When the backrest needs to be folded, the pull button 6-1 is pulled outwards to enable the pull button 6-1 to be separated from the rotation stopping mechanism on the rotation stopping table 5-2, at the moment, the sleeve 5-1 can be folded in a rotating mode relative to the mandrel 4-1, when the backrest is reset and unfolded, the backrest assembly 5 is pulled to rotate backwards, and after the backrest reaches the unfolded position, the pull button 6-1 is engaged with the rotation stopping mechanism on the rotation stopping table 5-2 again under the action of the return spring 6-4 to achieve backrest angle locking. The wheelchair backrest folding and unlocking mechanism of the embodiment realizes locking or unlocking of the rotary joint by utilizing the concave-convex wedging structure at the rotary joint of the backrest, is simple and ingenious in structural design, simple and convenient to operate, greatly facilitates quick folding of the wheelchair backrest, and is strong in supporting property, stable and reliable for the locked wheelchair backrest.

As a preferred embodiment, the rotation stopping mechanism comprises at least one groove 5-3 arranged on the end surface of the rotation stopping table 5-2 and a lug 6-2 arranged on the end surface of the pull button 6-1 and matched with the groove 5-3, the groove 5-3 is arranged on the rotation stopping table 5-2, and the lug 6-2 is arranged on the pull button 6-1, so that the processing and manufacturing of each part of the backrest folding and unlocking mechanism are facilitated. Of course, the groove structure may be provided on the pull knob 6-1 and the protrusion structure may be provided on the rotation stop table 5-2. In order to make the whole structure of the backrest folding unlocking mechanism 6 more compact, in the embodiment, as shown in fig. 3, the rear part of the pull button 6-1 is provided with a stepped hole 6-3 capable of accommodating the return spring 6-4 and the gland 6-5, the end part of the spindle 4-1 is provided with an external thread, the return spring 6-4 is sleeved on the spindle 4-1 penetrating through the pull button 6-1, and the gland 6-5 is fixed at the end part of the spindle 4-1 through the lock nut 6-6 to keep the return spring 6-4 inside the stepped hole 6-3. Therefore, the end parts of the reset spring 6-4, the gland 6-5 and the mandrel 4-1 are all hidden in the pull button 6-1, so that the backrest folding and unlocking mechanism 6 is simple and compact in structure and convenient to operate flexibly. In addition, the pull button 6-1 and the mandrel 4-1 can only slide in the axial direction and cannot rotate relatively, in the embodiment, the pull button 6-1 and the mandrel 4-1 are in key connection, the structure is simple, and the assembly is convenient. In order to facilitate the operation of the pull button 6-1, the outer wall of the pull button 6-1 is also provided with an annular groove which is convenient to pull, so as to facilitate the unlocking operation of the pull button 6-1.

In addition, the pivot 4-1 of the backrest assembly 5 can be arranged on the backrest assembly 5 or the wheelchair, and correspondingly, the sleeve 5-1 is arranged on the wheelchair or the backrest assembly 5, namely, the pivot 4-1 and the sleeve 5-1 are matched in rotation to form the rotary joint of the backrest assembly 5 on the wheelchair. In the embodiment, the mandrel 4-1 is arranged at the rear part of the frame 1 or the cushion assembly 4 of the wheelchair, the sleeve 5-1 is arranged on the backrest assembly 5, the backrest assembly 5 is sleeved on the mandrel 4-1 through the sleeve 5-1 to form a rotating connection relationship, and the end part of the mandrel 4-1 extends outwards so as to be convenient for installing the backrest folding unlocking mechanism 6.

As shown in fig. 1, a wheelchair backrest folding and unlocking mechanism of the present embodiment is preferably applied to an electric wheelchair, which includes a frame 1, front wheels 2, rear wheels 3, a cushion assembly 4, a backrest assembly 5, and a power mechanism, wherein the front wheels 2 are disposed at the front portion of the frame 1, preferably, an omni-wheel structure is used, the rear wheels 3 are disposed at the rear portion of the frame 1, the power mechanism is also disposed at the rear portion of the frame 1, and is in transmission connection with the rear wheels 3 for driving the rear wheels 3 to rotate, the power mechanism is preferably two sets of independently controlled motors, a battery pack and an operation controller, the rear wheels 3 at both sides of the rear portion of the frame 1 are respectively connected with a set of motors, the battery pack is fixed at the rear portion of the frame 1 to balance the center of gravity of the wheelchair, the operation controller is mounted on a handrail 7 of the wheelchair, the battery pack is used for providing, the control mode of the wheelchair motor by the operation controller is the same as that of the prior art, and the existing mature control mode is adopted, so that the detailed description is omitted. The cushion assembly 4 is arranged on the frame 1, the backrest assembly 5 is arranged at the rear part of the frame 1, and the backrest folding and unlocking mechanism 6 is arranged at the rotating joint of the backrest assembly 5. In order to ensure that the wheelchair backrest has enough strength, preferably, a group of backrest folding and unlocking mechanisms 6 are respectively arranged on the left side and the right side of the backrest assembly 5, and when the wheelchair backrest is used, the wheelchair backrest can be quickly folded by pulling the pull buttons 6-1 on the two sides simultaneously, so that the operation is simple and convenient.

The utility model discloses a folding release mechanism of wheelchair back, the folding release mechanism of back utilizes the unsmooth structure of agreeing with of back revolute joint department to realize revolute joint's locking or unblock, and structural design is simple ingenious, and easy operation is convenient, has greatly made things convenient for the quick folding of wheelchair back to wheelchair back support nature after the locking is strong, and is firm reliable.

The present invention and its embodiments have been described above schematically, and the description is not intended to be limiting, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without creatively designing the similar structural modes and embodiments to the technical solutions, they should belong to the protection scope of the present invention.

Claims

1. The utility model provides a wheelchair backrest folding release mechanism which characterized in that: the backrest folding and unlocking mechanism (6) comprises a pull button (6-1), a reset spring (6-4) and a gland (6-5), the rotary joint of the backrest assembly (5) on the wheelchair comprises a mandrel (4-1) and a sleeve (5-1) in rotary fit with the mandrel (4-1), the outer side end of the sleeve (5-1) is provided with a stop rotating table (5-2), the pull button (6-1) is arranged on the mandrel (4-1) and is in axial sliding connection with the mandrel (4-1), the gland (6-5) is fixed at the end of the mandrel (4-1), the reset spring (6-4) is positioned between the gland (6-5) and the pull button (6-1), the pull button (6-1) is pressed on the rotation stopping table (5-2) under the action of the return spring (6-4), and a rotation stopping mechanism in concave-convex fit is arranged on the matching end face of the pull button (6-1) and the rotation stopping table (5-2).

2. The wheelchair backrest folding unlocking mechanism of claim 1, wherein: the rotation stopping mechanism comprises at least one groove (5-3) arranged on the end face of the rotation stopping table (5-2) and a convex block (6-2) arranged on the end face of the pull button (6-1) and matched with the groove (5-3).

3. The wheelchair backrest folding unlocking mechanism of claim 2, wherein: the rear portion of the pull button (6-1) is provided with a stepped hole (6-3) capable of accommodating a return spring (6-4) and a gland (6-5), the return spring (6-4) is sleeved on a mandrel (4-1) penetrating through the pull button (6-1), the gland (6-5) is fixed at the end portion of the mandrel (4-1) through a locking nut (6-6), and the return spring (6-4) is kept in the stepped hole (6-3).

4. The wheelchair backrest folding unlocking mechanism of claim 3, wherein: the pull button (6-1) is connected with the mandrel (4-1) through a key.

5. The wheelchair backrest folding unlocking mechanism of claim 4, wherein: the outer wall of the pull button (6-1) is also provided with a ring groove convenient for drawing.

6. The wheelchair backrest folding unlocking mechanism of claim 5, wherein: the mandrel (4-1) is arranged at the rear part of a frame (1) or a cushion assembly (4) of the wheelchair, and the sleeve (5-1) is arranged on the backrest assembly (5).