CN220877104U - Folding wheelchair - Google Patents

Abstract

The application provides a folding wheelchair, which relates to the technical field of medical equipment and is used for solving the technical problem that the existing folding wheelchair can not quickly adjust the back elevation angle of a backrest bracket; the locking piece rotates relative to the backrest fixing seat and is provided with a locking part; the backrest fixing seat or the backrest bracket is provided with at least two locking positions matched with the locking parts, and each locking position is positioned on the rotating path of the backrest bracket; the second elastic member is configured to provide a locking force to the locking member so that the locking portion is selectively engaged with one of the locking bits. The folding wheelchair provided by the application can be used for rapidly adjusting the back elevation angle of the backrest bracket.

Description

Folding wheelchair

Technical Field

The application relates to the technical field of medical equipment, in particular to a folding 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 wheelchair comprises a backrest support, a backrest fixing seat and a seat cushion support, wherein the seat cushion support is fixedly connected with the backrest fixing seat, the backrest support is rotationally connected to the backrest fixing seat, a first elastic piece is arranged between the backrest support and the backrest fixing seat to provide rotating force of the backrest support, and then the backrest support can be adjusted according to the requirement of a user after the backrest support is released from limit, so that the comfort of the folding wheelchair is improved.

Specifically, the back support is provided with arc adjustment holes, the back fixing seat is provided with a plurality of fixing holes along the rotation direction interval of the back support, and fixing pins are selectively inserted between the arc adjustment holes and the fixing holes to adjust the back elevation angle of the back support. However, in the folding wheelchair, the insertion and extraction of the fixing pins is laborious, so that the back elevation angle of the backrest bracket cannot be quickly adjusted.

Disclosure of utility model

The application aims to provide a folding wheelchair which can quickly adjust the back elevation angle of a backrest bracket.

In order to achieve the above object, the embodiment of the present application provides the following technical solutions:

the embodiment of the application provides a folding wheelchair, which comprises a backrest bracket and backrest fixing seats respectively arranged at two sides of the backrest bracket; the backrest bracket is rotatably connected to the backrest fixing seat, an adjusting assembly is arranged between the backrest bracket and the backrest fixing seat, and the adjusting assembly is configured to adjust the reclining angle of the backrest bracket; the adjusting assembly comprises a first elastic piece, a second elastic piece and a locking piece, wherein the first elastic piece is configured to provide elastic force for the backrest bracket so as to reset the backrest bracket; the locking piece rotates relative to the backrest fixing seat and is provided with a locking part; the backrest fixing seat or the backrest bracket is provided with at least two locking positions matched with the locking parts, and each locking position is positioned on the rotating path of the backrest bracket; the second elastic piece is configured to provide a locking force to the locking piece so that the locking part is selectively clamped with one of the locking positions.

In an alternative embodiment, the adjustment assembly further comprises a limit rail in communication with the locking position; the extending direction of the limit rail is consistent with the rotating path of the backrest bracket, and at least part of the locking part is slidably arranged in the limit rail and embedded into the locking position.

In an alternative embodiment, one side of the limit rail is provided with at least two concave parts communicated with the limit rail; each concave part is arranged at intervals along the extending direction of the limiting rail, and the concave parts form the locking position.

In an alternative embodiment, the limit rail is configured as an arcuate limit slot; the concave part is configured as a locking groove communicated with the arc-shaped limiting groove.

In an alternative embodiment, the locking piece comprises a body and a locking post arranged on the body, wherein the locking post is configured as the locking part; at least part of the locking column can be slidably arranged in the arc-shaped limiting groove and can be embedded in the locking groove.

In an alternative embodiment, the locking member further comprises a turning handle; a first end of the rotating handle is connected with the body, and a second end of the rotating handle is configured as a force application part; the force application part is configured to receive a rotating force so as to overcome the elastic force of the second elastic piece and enable the locking piece to rotate relative to the backrest fixing seat.

In an alternative embodiment, the locking member further comprises a rotational shaft aperture; the backrest fixing seat or the backrest bracket is provided with a rotating shaft matched with the rotating shaft hole; the locking piece is sleeved on the rotating shaft through the rotating shaft hole.

In an alternative embodiment, the adjustment assembly further comprises a travel limiting aperture; the stroke limiting hole and the locking position are both arranged on the backrest fixing seat or the backrest bracket at the same time; the stroke limiting hole is positioned on one side of the locking position, and the extending direction of the stroke limiting hole is consistent with the rotating path of the backrest bracket.

In an alternative embodiment, the locking member is rotatably connected to the back rest holder; at least two locking positions and the stroke limiting holes are arranged on the backrest bracket; the backrest fixing seat is provided with a limiting column, and the limiting column is slidably mounted in the stroke limiting hole.

In an alternative embodiment, the back rest bracket includes a back rest body and a mount; the mounting seat is detachably arranged on the backrest main body, and the backrest bracket is rotationally connected with the backrest fixing seat through the mounting seat; the locking piece is rotationally connected to the mounting seat, and at least two locking positions and the travel limiting hole are arranged on the backrest fixing seat; the backrest support is provided with a limiting column, and the limiting column is slidably mounted in the stroke limiting hole.

Compared with the related art, the folding wheelchair provided by the embodiment of the application has the following advantages;

The embodiment of the application provides a folding wheelchair, which is characterized in that an adjusting component is arranged between a backrest fixing seat and a backrest bracket, the adjusting component comprises a rotatable locking piece, the backrest bracket or the backrest fixing seat is provided with at least two locking positions, each locking position is respectively positioned on a rotating path of the backrest bracket, and each locking position can correspond to a reclining angle of one backrest bracket.

The locking piece is provided with a locking part matched with the locking position, a second elastic piece is arranged between the locking piece and the backrest fixing seat and is used for providing locking force for the locking piece so that the locking part is clamped with the locking position and then locks the backrest bracket and the backrest fixing seat. For example, the locking piece is rotatably connected to the backrest fixing seat, the locking position is arranged on the backrest bracket, and the locking part can be clamped with the locking position by adjusting the posture of the locking piece.

When the back elevation angle of the backrest bracket needs to be adjusted, a rotating force is applied to the locking piece to overcome the elastic force of the second elastic piece, and the clamping state of the locking part and the locking position is released. The locking part is further clamped with one of the locking positions selectively, so that the back elevation angle of the backrest bracket is adjusted.

The backrest support of the folding wheelchair in the related art is provided with arc-shaped adjusting holes, the backrest fixing seats are provided with a plurality of fixing holes along the rotation direction of the backrest support at intervals, and the fixing pins are selectively inserted between the arc-shaped adjusting holes and the fixing holes so as to adjust the back elevation angle of the backrest support, however, the fixing pins are affected by the elastic force of the first elastic piece to generate shearing force, so that the fixing pins are laborious to insert and extract, and the back elevation angle of the backrest support cannot be adjusted rapidly.

However, in the embodiment of the application, the back elevation angle of the backrest bracket is adjusted through the locking piece, only the rotating force is needed to be applied to the locking piece, the locking state of the backrest bracket and the backrest fixing seat can be released, and the adjusted backrest bracket is locked by means of the locking force of the locking piece, so that the fixed pin is not needed to be inserted and pulled, and the back elevation angle of the backrest bracket can be adjusted rapidly.

In addition to the technical problems, technical features constituting the technical solutions, and beneficial effects caused by the technical features of the technical solutions described above in the embodiments of the present disclosure, other technical problems that can be solved by the folding wheelchair provided in the embodiments of the present disclosure, other technical features included in the technical solutions, and beneficial effects caused by the technical features will be described in further detail in the detailed description of the present disclosure.

Drawings

Fig. 1 is an assembly schematic diagram of a backrest bracket, a backrest fixing seat, a seat cushion bracket and a locking member of a folding wheelchair according to an embodiment of the present application;

Fig. 2 is an assembly schematic diagram of a backrest bracket, a locking member and a backrest fixing seat according to a first embodiment of the present application;

FIG. 3 is an exploded view of a back rest bracket and a back rest holder of a locking member according to an embodiment of the present application;

FIG. 4 is an enlarged schematic view of FIG. 3 at A;

Fig. 5 is a detailed schematic diagram of connection of the backrest bracket, the locking member and the backrest fixing seat according to the first embodiment of the present application;

fig. 6 is a second detailed schematic diagram of connection between the backrest bracket, the locking member and the backrest fixing seat according to the first embodiment of the present application;

FIG. 7 is a schematic diagram illustrating an assembly of a locking member and a backrest fixing base according to a first embodiment of the present application;

Fig. 8 is a schematic structural diagram of a mounting seat according to a first embodiment of the present application;

fig. 9 is a schematic structural diagram of a mounting seat according to a first embodiment of the present application;

FIG. 10 is a schematic structural view of a locking member according to a first embodiment of the present application;

Fig. 11 is a schematic structural view of a backrest fixing seat according to a first embodiment of the present application;

fig. 12 is a schematic structural view of a seat cushion bracket according to a first embodiment of the present application;

fig. 13 is an assembly schematic diagram of a backrest bracket, a backrest fixing seat, a seat cushion bracket and a locking member of a folding wheelchair according to a second embodiment of the present application;

Fig. 14 is a detailed schematic diagram of connection between a backrest bracket, a locking member and a backrest fixing seat according to a second embodiment of the present application;

fig. 15 is a second detailed schematic diagram of connection between the backrest bracket, the locking member and the backrest fixing seat according to the second embodiment of the present application;

Fig. 16 is an assembly schematic diagram of a locking member and a backrest fixing seat according to a second embodiment of the present application;

Fig. 17 is a schematic structural diagram of a backrest fixing seat according to a second embodiment of the present application;

Fig. 18 is a schematic structural diagram of a backrest fixing seat according to a second embodiment of the present application;

fig. 19 is a schematic structural diagram of a mounting seat according to a second embodiment of the present application.

Reference numerals illustrate:

10-a backrest support;

11-a backrest body; 12-mounting seats;

20-a seat cushion bracket;

21-mounting ears;

30-a backrest fixing seat;

40-an adjustment assembly;

41-limiting rails; 42-locking position; 43-stroke limit hole;

44-locking member;

441-body; 442-locking part; 443-turning the handle; 444-rotating shaft hole;

45-a first elastic member;

46-a second elastic member;

47-limit posts; 48-avoidance slot.

Detailed Description

As described in the background art, the back elevation angle of the backrest support cannot be quickly adjusted in the folding wheelchair; the inventors have found that the cause of this problem is:

In the existing folding wheelchair, a seat cushion support is fixedly connected with a backrest fixing seat, the backrest support is rotatably connected to the backrest fixing seat, and a first elastic piece is arranged between the backrest support and the backrest fixing seat so as to provide rotating force of the backrest support. The back support is provided with arc adjustment holes, and the back fixing base is provided with a plurality of fixed orifices along the direction of rotation interval of back support to select to insert the fixed pin between arc adjustment hole and fixed orifices, adjust back elevation angle degree of back support. However, the fixing pin is affected by the elastic force of the first elastic member, so that the fixing pin is subjected to a shearing force, and the fixing pin is laborious to insert and extract, so that the back elevation angle of the backrest bracket cannot be adjusted rapidly.

In view of the above technical problems, the embodiments of the present application provide a folding wheelchair, in which a rotatable locking member is disposed between a backrest fixing seat and a backrest support, at least two locking positions are disposed on the backrest support or the backrest fixing seat, each locking position is located on a rotation path of the backrest support, and each locking position can correspond to a reclining angle of one backrest support.

The locking piece is provided with a locking part matched with the locking position, a second elastic piece is arranged between the locking piece and the backrest fixing seat and is used for providing locking force for the locking piece so that the locking part is clamped with the locking position and then locks the backrest bracket and the backrest fixing seat.

In this way, in the embodiment of the application, the back elevation angle of the backrest bracket is adjusted through the locking piece, only the rotating force is needed to be applied to the locking piece, the locking state of the backrest bracket and the backrest fixing seat can be released, and the adjusted backrest bracket is locked by means of the locking force of the locking piece, so that the fixed pin is not needed to be inserted and pulled, and the back elevation angle of the backrest bracket can be adjusted rapidly.

In order to make the above objects, features and advantages of the embodiments of the present application more comprehensible, the technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

For the convenience of describing the embodiments of the present application, a coordinate system shown in the drawings will be described, wherein an X-axis direction is a first direction, and the first direction may be a left-right direction of the folding wheelchair; the Y-axis direction is a second direction, and the second direction can be the front direction and the rear direction of the folding wheelchair; the Z-axis direction is the third direction, and the third direction is the height direction of the folding wheelchair.

As shown in fig. 1 to 4, the folding wheelchair provided by the embodiment of the application comprises a backrest bracket 10 and a seat cushion bracket 20, wherein a backrest fixing seat 30 is respectively arranged at two sides of the backrest bracket 10 along a first direction, and the backrest bracket 10 is rotatably connected with the backrest fixing seat 30 so as to adjust the back elevation angle of the backrest bracket 10; the back angle of the backrest bracket 10 relative to the backrest fixing base 30 can be adjusted in multiple gears.

Illustratively, in some embodiments, the backrest bracket 10 includes a backrest main body 11 and a mounting base 12, the mounting base 12 is disposed at an end of the backrest main body 11 facing the backrest fixing base 30, i.e. along the third direction, the mounting base 12 may be disposed at a bottom of the backrest main body 11, and the mounting base 12 is detachably connected with the backrest main body 11; for example, the mount 12 is connected to the back main body 11 by fasteners. By this arrangement, the backrest bracket 10 and the backrest fixing base 30 can be connected in a rotatable manner.

It will be appreciated that in other embodiments, the mounting base 12 and the backrest main body 11 may be integrally formed, so as to enhance the structural strength of the backrest frame 10, which is not limited in this embodiment. Preferably, the mounting base 12 is detachably connected to the backrest main body 11 in the embodiment of the present application, and this embodiment is described as an example.

In the second direction, the seat cushion bracket 20 is disposed in front of the back bracket 10 and at the bottom of the back bracket 10. The two sides of the seat cushion bracket 20, which are close to one end of the backrest bracket 10, are respectively connected with the backrest fixing seat 30, and no relative rotation exists between the backrest fixing seat 30 and the seat cushion bracket 20. Wherein the seat cushion bracket 20 is used for installing a seat cushion, the backrest bracket 10 is used for installing a backrest cushion, when a user takes a folding wheelchair, the user sits on the seat cushion, and the back of the user can lean against the backrest cushion to promote the riding experience.

As shown in fig. 5 to 7, an adjusting component 40 is disposed between the backrest bracket 10 and the backrest fixing base 30 in the embodiment of the application, the adjusting component 40 is configured to adjust the recline angle of the backrest bracket 10 relative to the backrest fixing base 30, and the recline angle of the backrest fixing base 30 can be adjusted in multiple gears.

Specifically, the adjusting assembly 40 includes a first elastic member 45, the first elastic member 45 is disposed between the backrest bracket 10 and the backrest fixing base 30, and the first elastic member 45 is configured to provide a restoring force to the backrest bracket 10 to rotate the backrest bracket 10 relative to the backrest fixing base 30.

For example, the first elastic member 45 may be a torsion spring, and the torsion spring is mounted at a rotation connection portion of the backrest bracket 10 and the backrest fixing seat 30 in a pre-tightening state, and one end of the torsion spring is connected with the backrest bracket 10, and the other end of the torsion spring is connected with the backrest fixing seat 30. The torsion spring applies a restoring force to the back bracket 10 to restore the back bracket 10.

In some embodiments, when the back bracket 10 is reset, the back bracket 10 rotates forward with respect to the back fixing seat 30, i.e., when in the locked state, the back bracket 10 has a tendency to rotate toward the seat cushion bracket 20 side, and when the locked state of the back bracket 10 is released, the back bracket 10 rotates forward.

Or in other embodiments, according to the requirement of the user for the angle adjustment of the backrest bracket 10, the installation angle or the position of the first elastic member 45 can be adjusted, so that when the backrest bracket 10 is reset, the backrest bracket 10 rotates towards the rear side relative to the backrest fixing seat 30, that is, when in the locked state, the backrest bracket 10 has a tendency to rotate away from one side of the seat cushion bracket 20, and when the locked state of the backrest bracket 10 is released, the backrest bracket 10 rotates backwards. In this embodiment, the backrest bracket 10 is turned forward relative to the backrest fixing base 30 when the backrest bracket 10 is reset, unless otherwise specified.

The adjusting assembly 40 provided in the embodiment of the present application further includes a locking member 44 and at least two locking positions 42, wherein the locking member 44 is disposed between the backrest fixing seat 30 and the backrest bracket 10 along the first direction, the locking member 44 can rotate relative to the backrest fixing seat 30, and the locking member 44 is configured to lock the backrest bracket 10.

The locking member 44 includes a locking portion 442, where the locking portion 442 may be a limiting protrusion disposed on the locking member 44, and the limiting protrusion cooperates with the locking position 42, so that the locking portion 442 may be embedded in the locking position 42 and lock the backrest bracket 10. It can be understood that each locking bit 42 in this embodiment corresponds to a different angle of elevation of the back rest frame 10, and each locking bit 42 is disposed at intervals on the rotation path of the back rest frame 10.

Illustratively, the locking position 42 may be selectively provided on the back rest mount 30 or the back rest bracket 10 depending on the mounting position of the locking member 44. For example, the locking member 44 may be rotatably connected to the backrest fixing base 30, and the two locking positions 42 may be disposed on the mounting base 12; or the locking member 44 is rotatably coupled to the mounting base 12, at least two locking positions 42 are provided on the back rest fixing base 30.

The adjusting assembly 40 provided by the embodiment of the application further includes a second elastic member 46, where the second elastic member 46 is configured to provide an elastic force to the locking member 44, and under the action of the elastic force, the locking member 44 can rotate or swing relative to the backrest fixing seat 30, so as to enable the locking portion 442 to be disengaged from the locking position 42, and release the state of the backrest bracket 10 and the backrest fixing seat 30; and, when the locking portion 442 moves to the corresponding locking position 42 and is engaged, the second elastic member 46 is configured to provide a locking force to the locking member 44, so that the locking portion 442 is selectively engaged with one of the locking positions 42.

The second elastic member 46 may be a tension spring, for example, and the tension spring is installed in a pre-tensioned state. The first end of the tension spring is connected with one end of the locking member 44, the second end of the tension spring is connected with the backrest fixing seat 30 or the backrest bracket 10, and the installation angle or position of the second elastic member 46 can be adjusted according to the operation angle of the locking member 44 by a user.

For example, in one embodiment, the locking member 44 is rotatably mounted on the back fixing seat 30, the first end of the torsion spring is connected to the locking member 44, the second end of the tension spring is connected to the back fixing seat 30, and the elastic force of the tension spring applied to the locking member 44 can rotate the locking member 44 toward the front side with respect to the back fixing seat 30, i.e., the locking member 44 has a tendency to rotate toward the seat cushion bracket 20 side, and provides a locking force to the locking member 44.

When it is necessary to unlock the locked state of the locking member 44 with the back bracket 10, a rotational force may be applied to the locking member 44 to overcome the elastic force of the second elastic member 46 and rotate the locking member 44 toward the side away from the seat cushion bracket 20 to achieve the unlocked state.

In another embodiment, the locking member 44 is rotatably mounted on the mounting seat 12 of the backrest bracket 10, the first end of the tension spring is connected to the locking member 44, the second end of the tension spring is connected to the mounting seat 12, and the elastic force of the tension spring applied to the locking member 44 can rotate the locking member 44 toward the rear side with respect to the backrest fixing seat 30, i.e., the locking member 44 has a tendency to rotate toward the side away from the seat cushion bracket 20, and provides a locking force to the locking member 44.

When the locked state of the back rest bracket 10 needs to be released, a rotational force may be applied to the locking piece 44 to overcome the elastic force of the second elastic piece 46, and the locking piece 44 may be rotated toward the side close to the seat cushion bracket 20 to achieve the unlocked state; the present embodiment is not limited thereto.

When the adjustment assembly provided by the embodiment of the application is used for adjusting the back elevation angle of the backrest bracket 10, the locking piece 44 is first applied with a rotation force, so that the locking part 442 can be disengaged from the locking position 42, and the backrest bracket 10 is unlocked.

Then, under the action of the first elastic member 45, the backrest bracket 10 rotates relative to the backrest fixing base 30, so as to drive each locking position 42 to move, when the appropriate locking position 42 moves to the locking portion 442, the locking member 44 can be released, so that the locking portion 442 is embedded into the locking position 42 and clamped under the action of the second elastic member 46, and the second elastic member 46 can provide a locking force to the locking member 44.

It should be noted that, in the embodiment of the present application, the rotational force applied to the locking member 44 during unlocking is greater than the locking force, so that the locking portion 442 and the locking portion 42 can be released from the locking state.

The backrest support of the folding wheelchair in the related art is provided with arc-shaped adjusting holes, the backrest fixing seats are provided with a plurality of fixing holes along the rotation direction of the backrest support at intervals, the fixing pins are selectively inserted between the arc-shaped adjusting holes and the fixing holes to adjust the back elevation angle of the backrest support, however, the fixing pins are affected by the elasticity of the elastic piece, and the fixing pins are laborious to insert and extract, so that the back elevation angle of the backrest support cannot be adjusted rapidly.

However, in the embodiment of the present application, the locking force of the backrest bracket 10 and the backrest fixing seat 30 can be released by only applying a rotational force to the locking member 44 when the back elevation angle of the backrest bracket 10 is adjusted by the locking member 44, and the adjusted backrest bracket 10 is locked by the locking force of the locking member 44 itself, so that the back elevation angle of the backrest bracket 10 can be adjusted quickly without inserting and extracting the fixing pin.

Based on the above embodiments, the locking position 42 may be selectively provided on the backrest fixing base 30 or the backrest bracket 10 due to the difference in the installation position of the locking member 44 in the embodiment of the present application. Accordingly, the mounting positions and the fitting relationships of the other components of the adjusting assembly 40 are different, and the following description will be given by taking the first embodiment and the second embodiment as examples.

Example 1

In the embodiment of the application, the locking member 44 is rotatably connected to the backrest fixing base 30, and the second elastic member 46 is disposed between the backrest fixing base 30 and the locking member 44, and the at least two locking positions 42 are disposed on the mounting base 12.

As shown in fig. 8 and 9, the backrest bracket 10 includes a limit rail 41, the extending direction of the limit rail 41 is consistent with the rotation path of the backrest bracket 10, the limit rail 41 is matched with a locking portion 442 of the locking member 44, and the locking portion 442 is slidably mounted in the limit rail 41, so that the locking portion 442 can slide in the limit rail 41 when the backrest bracket 10 rotates.

Further, at least two concave portions are disposed on the upper side edge of the limiting rail 41, and the concave portions are communicated with the limiting rail 41, and the concave portions are disposed at intervals along the extending direction of the limiting rail 41, and each concave portion can form a locking position 42.

After the backrest bracket 10 is unlocked, the backrest bracket 10 can slide relative to the locking portion 442, when one of the concave portions moves to a position opposite to the locking portion 442, the locking member 44 can be released, and the locking member 44 can be embedded into the concave portion under the action of the second elastic member 46, so as to complete the adjustment of the back elevation angle of the backrest bracket 10.

For example, a side surface of the backrest bracket 10 facing the locking portion 442 may be provided with an arc-shaped limit groove and a plurality of locking grooves communicating with the arc-shaped limit groove, and the arc-shaped limit groove is configured as the limit rail 41, the locking grooves may be configured as concave portions, each locking groove forms one locking position 42, and the locking portion 442 slides in the locking groove, and the locking portion 442 may move into the locking groove and be clamped.

Or the backrest bracket 10 is provided with an arc-shaped limiting hole, and along the first direction, the arc-shaped limiting hole may penetrate through the entire backrest bracket 10, so that the arc-shaped limiting hole forms the limiting rail 41. The concave part is configured as a locking hole communicated with the arc-shaped limiting hole, namely, the upper side edge of the arc-shaped limiting hole is provided with a plurality of locking holes, the locking holes also penetrate through the whole backrest bracket 10 along the first direction, and one side of each locking hole is communicated with the arc-shaped limiting hole, so that the locking part 442 can be embedded into the locking hole from the arc-shaped limiting hole; the embodiments of the present application are not limited in this regard.

As shown in fig. 10, the locking member 44 provided by the embodiment of the application includes a body 441 and locking posts disposed on the body 441, wherein the locking posts and the second elastic member 46 are disposed at two ends of the body 441 along a third direction, respectively, and the locking posts are configured as locking portions 442.

For example, the locking post may be a cylinder, and the locking position 42 may be configured as a semicircular hole or another arc-shaped hole, which is not limited in this embodiment, so long as at least part of the locking post can be slidably mounted in the arc-shaped limit groove and can be embedded in the locking groove.

On the basis of the above embodiment, in order to apply a rotational force to the locking member 44 to release the locking state of the locking member 44 and the backrest bracket 10, the locking member 44 according to the embodiment of the present application further includes a rotating handle 443, the rotating handle 443 may have a sheet structure, one end of the rotating handle 443 is fixedly connected to the body 441, the other end of the rotating handle 443 protrudes from the backrest fixing seat 30 in the third direction, and a force applying portion is formed by partially protruding the rotating handle 443 of the backrest fixing seat 30, so that the rotational force is provided to the locking member 44 by pushing and pulling the force applying portion, thereby overcoming the elastic force of the second elastic member 46, and rotating the locking member 44 relative to the backrest fixing seat 30, thereby releasing the locking post from the locking position 42.

As shown in fig. 11, the backrest fixing base 30 is provided with a avoidance slot 48 matched with a rotation handle 443, the rotation handle 443 is inserted into the avoidance slot 48, and the rotation handle 443 has a certain movable space relative to the avoidance slot 48, so as to ensure that the locking piece 44 can rotate, and avoid the phenomenon that the locking piece 44 cannot rotate or the rotation range is smaller, so that the locking column cannot be separated from the locking position 42.

Further, the locking member 44 further includes a rotation shaft hole 444, and the rotation shaft hole 444 may be a blind hole provided on the body 441. The backrest fixing base 30 is provided with a rotating shaft matched with the rotating shaft hole 444, and the rotating shaft hole 444 is sleeved on the rotating shaft to realize that the locking piece 44 is connected to the backrest fixing base 30 in a rotating mode.

In order to further ensure the rotation stability of the backrest bracket 10 relative to the backrest fixing seat 30 and limit the adjustment range of the reclining angle of the backrest bracket 10, the adjusting assembly 40 provided in the embodiment of the application further includes a travel limit hole 43, the travel limit hole 43 may be disposed at a side of the arc limit hole facing the rotation axis of the backrest bracket 10, and the extending direction of the travel limit hole 43 is consistent with the rotation path of the backrest bracket 10.

Correspondingly, a limit post 47 is arranged on one side of the backrest fixing seat 30 facing the backrest bracket 10, the limit post 47 is inserted into the travel limit hole 43, and when the backrest bracket 10 rotates, the limit post 47 can move in the travel limit hole 43. Further, the back fixing seat 30 is connected with the seat cushion bracket 20.

Further, as shown in fig. 12, along the first direction, the mounting lugs 21 are respectively provided on two sides of the seat cushion bracket 20, the mounting lugs 21 are provided with fixing holes, and the limiting posts 47 are provided with internal threaded holes, so that the mounting lugs 21 are attached to the end surfaces of the limiting posts 47, and the seat cushion bracket 20 is mounted on the limiting posts 47 by fixing pieces inserted into the fixing holes and the internal threaded holes.

Example two

As shown in fig. 13 to 16, in the embodiment of the present application, the locking member 44 is rotatably connected to the mounting base 12, and the second elastic member 46 is disposed between the mounting base 12 and the locking member 44, and the at least two locking positions 42 are disposed on the backrest fixing base 30.

As shown in fig. 17 and 18, the backrest fixing base 30 is provided with a limit rail 41 and at least two concave portions, wherein the extending direction of the limit rail 41 is consistent with the rotation path of the backrest bracket 10, and the concave portions are disposed on the upper side of the limit rail 41 and are communicated with the limit rail 41. The concave portions are respectively arranged at intervals along the extending direction of the limiting rail 41, and each concave portion can form a locking position 42. It should be noted that, for the specific structure of the recess portion and the limiting rail 41, reference may be made to the first embodiment, and the description thereof will not be repeated here.

Further, the locking member 44 of the embodiment of the present application includes a rotating handle 443, and the specific structure of the locking handle can be referred to as the first embodiment, and will not be described herein. In particular, in the embodiment of the present application, one end of the rotating handle 443 is fixedly connected to the body 441, and in the third direction, the other end of the rotating handle 443 protrudes from the mounting seat 12, and a force application portion is formed by the rotating handle 443 partially protruding from the mounting seat 12.

Accordingly, as shown in fig. 19, the mounting base 12 is provided with a avoidance slot 48 matched with a rotation handle 443, the rotation handle 443 is penetrated in the avoidance slot 48, and the rotation handle 443 has a certain movable space relative to the avoidance slot 48, so as to ensure that the locking piece 44 can rotate, and avoid the phenomenon that the locking piece 44 cannot rotate or the rotation range is smaller and the locking column cannot be separated from the locking position 42.

Further, the mounting base 12 is further provided with a rotating shaft matched with the rotating shaft hole 444, and the rotating shaft hole 444 is sleeved on the rotating shaft, so that the locking piece 44 is rotatably connected to the backrest fixing base 30.

In order to further ensure the rotation stability of the backrest bracket 10 relative to the backrest fixing seat 30 and limit the adjustment range of the reclining angle of the backrest bracket 10, the adjusting assembly 40 provided in the embodiment of the application further includes a travel limit hole 43, the travel limit hole 43 is located on the backrest fixing seat 30, the travel limit hole 43 may be disposed on a side of the limit rail 41 facing the rotation axis of the backrest bracket 10, and the extending direction of the travel limit hole 43 is consistent with the rotation path of the backrest bracket 10.

Correspondingly, a limit post 47 is arranged on one side of the mounting seat 12 facing the backrest fixing seat 30, the limit post 47 is inserted into the travel limit hole 43, and when the backrest bracket 10 rotates, the limit post 47 can move in the travel limit hole 43. Further, the back fixing seat 30 is connected with the seat cushion bracket 20.

In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

It should be noted that references in the specification to "one embodiment," "an example embodiment," "some embodiments," etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to effect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.

Generally, terms should be understood at least in part by use in the context. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, at least in part depending on the context. Similarly, terms such as "a" or "an" may also be understood to convey a singular usage or a plural usage, depending at least in part on the context.

It should be readily understood that the terms "on … …", "above … …" and "above … …" in this disclosure should be interpreted in the broadest sense so that "on … …" means not only "directly on something" but also includes "on something" with intermediate features or layers therebetween, and "above … …" or "above … …" includes not only the meaning "on something" or "above" but also the meaning "above something" or "above" without intermediate features or layers therebetween (i.e., directly on something).

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (10)

1. The folding wheelchair is characterized by comprising a backrest bracket and backrest fixing seats respectively arranged at two sides of the backrest bracket;

The backrest bracket is rotatably connected to the backrest fixing seat, an adjusting assembly is arranged between the backrest bracket and the backrest fixing seat, and the adjusting assembly is configured to adjust the reclining angle of the backrest bracket;

The adjusting assembly comprises a first elastic piece, a second elastic piece and a locking piece, wherein the first elastic piece is configured to provide elastic force for the backrest bracket so as to reset the backrest bracket;

The locking piece rotates relative to the backrest fixing seat and is provided with a locking part; the backrest fixing seat or the backrest bracket is provided with at least two locking positions matched with the locking parts, and each locking position is positioned on the rotating path of the backrest bracket;

The second elastic piece is configured to provide a locking force to the locking piece so that the locking part is selectively clamped with one of the locking positions.

2. The folding wheelchair of claim 1 wherein said adjustment assembly further includes a limit rail in communication with said locking position;

The extending direction of the limit rail is consistent with the rotating path of the backrest bracket, and at least part of the locking part is slidably arranged in the limit rail and embedded into the locking position.

3. The folding wheelchair of claim 2, wherein one side of the limit rail is provided with at least two recesses in communication therewith;

Each concave part is arranged at intervals along the extending direction of the limiting rail, and the concave parts form the locking position.

4. The folding wheelchair of claim 3 wherein said limit rail is configured as an arcuate limit slot;

The concave part is configured as a locking groove communicated with the arc-shaped limiting groove.

5. The folding wheelchair of claim 4 wherein said lock comprises a body and a lock post disposed on said body, said lock post configured as said lock;

at least part of the locking column can be slidably arranged in the arc-shaped limiting groove and can be embedded in the locking groove.

6. The folding wheelchair of claim 5 wherein said lock further comprises a turning handle;

a first end of the rotating handle is connected with the body, and a second end of the rotating handle is configured as a force application part;

The force application part is configured to receive a rotating force so as to overcome the elastic force of the second elastic piece and enable the locking piece to rotate relative to the backrest fixing seat.

7. The folding wheelchair of claim 5 wherein said locking member further comprises a rotational shaft aperture;

The backrest fixing seat or the backrest bracket is provided with a rotating shaft matched with the rotating shaft hole;

The locking piece is sleeved on the rotating shaft through the rotating shaft hole.

8. The folding wheelchair of any one of claims 1 to 7 wherein said adjustment assembly further includes a travel limit aperture;

The stroke limiting hole and the locking position are both arranged on the backrest fixing seat or the backrest bracket at the same time;

The stroke limiting hole is positioned on one side of the locking position, and the extending direction of the stroke limiting hole is consistent with the rotating path of the backrest bracket.

9. The folding wheelchair of claim 8 wherein said locking member is rotatably connected to said back rest mount;

At least two locking positions and the stroke limiting holes are arranged on the backrest bracket;

the backrest fixing seat is provided with a limiting column, and the limiting column is slidably mounted in the stroke limiting hole.

10. The folding wheelchair of claim 8 wherein said back support comprises a back main body and a mount;

The mounting seat is detachably arranged on the backrest main body, and the backrest bracket is rotationally connected with the backrest fixing seat through the mounting seat;

the locking piece is rotationally connected to the mounting seat, and at least two locking positions and the travel limiting hole are arranged on the backrest fixing seat;

The backrest support is provided with a limiting column, and the limiting column is slidably mounted in the stroke limiting hole.