CN112336106B

CN112336106B - Folding chair and folding wheelchair

Info

Publication number: CN112336106B
Application number: CN202011032150.2A
Authority: CN
Inventors: 李建国; 李永强; 刘杰; 刘伯锋; 姜士伟; 王晓栋; 张哲夫; 乔智; 程晨航; 张扬; 赵洪伟
Original assignee: Jiangsu Bangbang Intelligent Technology Co ltd
Current assignee: Jiangsu Bangbang Intelligent Technology Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2024-01-19
Anticipated expiration: 2040-09-27
Also published as: CN112336106A

Abstract

The invention aims to provide a novel folding chair and a folding wheelchair, in particular to a novel folding mode, which comprises a chassis, a folding bracket and a seat, wherein the folding bracket is hinged between the chassis and the seat, the folding bracket comprises a left connecting rod and a right connecting rod and a left connecting rod and a right connecting rod, the B connecting rod on each side is arranged in front of the A connecting rod, one end of the A connecting rod hinged with the seat is provided with a clamping groove, the lower end of the seat is provided with a clamping shaft, and the clamping shaft can be separated from and clamped into the clamping groove.

Description

Folding chair and folding wheelchair

Technical Field

The invention relates to chairs and wheelchairs, in particular to a folding technique of chairs and wheelchairs.

Background

Chairs and wheelchairs are visible everywhere in daily life, various folding chairs and folding wheelchairs are available in order to reduce occupied space when the chair is convenient to carry and idle, and the invention also provides a novel folding chair and a novel folding wheelchair.

Disclosure of Invention

The technical scheme provides a novel folding mode of the folding chair, and the specific folding power can be manual or electric.

Preferably, a pull shaft is further arranged on the A connecting rod, an elastic piece is arranged between the pull shaft and the clamping shaft, and the elastic piece is always in a stretching state.

The technical scheme provides convenience for resetting the pull shaft.

Preferably, the device further comprises a pull rod and a pull handle, wherein the pull rod is hinged with the clamping shaft, and the pull handle is hinged with the pull rod.

Preferably, the pull handle is hinged to the seat by a connecting lug.

In the technical scheme, the folding chair is folded by adopting a manual method.

Preferably, the seat further comprises a braking component mounted on the seat, and the clamping shaft is connected with the braking component.

Preferably, the braking component is a push rod motor or a gas spring or a hydraulic component or a gas-liquid mixing component.

In the technical scheme, the folding chair is folded by adopting an automatic method.

Preferably, the seat comprises a seat and a chair back, wherein a support is arranged on the seat, a support is arranged on the chair back, and the support is hinged with the support; the chair further comprises a stop mechanism which can be inserted into and separated from the space between the support and the support, when the stop mechanism is inserted between the support and the support, the chair back is fixed, and when the stop piece is separated from the space between the support and the support, the chair back can rotate around the support.

Preferably, the stop mechanism comprises a sleeve and a stop piece, the sleeve is mounted on the support, one end of the sleeve is wedge-shaped, the stop piece comprises a deflector rod, a stop pin and a spring, the deflector rod is connected with the stop pin, the spring is sleeved on the stop pin, and when the deflector rod is placed into the wedge-shaped part of the sleeve upwards, the chair back is fixed and cannot rotate.

The technical scheme provides a folding technology of the chair back.

Preferably, the chair further comprises an armrest hinged with the chair back, and a wave bead spring pin is arranged at the hinge position of the armrest and the chair back.

The technical scheme provides a folding technology of the handrail.

The invention also provides a folding wheelchair, and the chassis is connected with a movable wheel on the basis of the folding chair.

The technical scheme provides a folding wheelchair.

Drawings

The above features, technical features, advantages and implementation of the adjustable chest protector according to the present invention will be further described in the following description of the preferred embodiments with reference to the accompanying drawings in a clearly understood manner.

FIG. 1 is a side view of a folding wheelchair of the present invention;

FIG. 2 is a perspective view of a folding wheelchair of the present invention;

FIG. 3 is a front view of a folding wheelchair of the present invention;

FIG. 4 is a rear elevational view of a folding wheelchair of the present invention;

fig. 5 is a front cross-sectional view of a folding wheelchair of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will explain the specific embodiments of the present invention with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the invention, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

For simplicity of the drawing, only the parts relevant to the present invention are schematically shown in each drawing, and they do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.

In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. In this document, upper, lower, left, right, front and right refer to upper, lower, left, right, front and right of the described drawings, which do not entirely represent actual situations.

In a first embodiment, a folding chair 100 includes a chassis 10, a folding bracket 20, and a seat 30, wherein the folding bracket 20 is hinged between the chassis 10 and the seat 30.

The folding bracket 20 comprises a left connecting rod 21, a right connecting rod 21, a left connecting rod 22, a right connecting rod 22, a left connecting seat 11, a right connecting seat 11 and a left connecting seat 31 are arranged on the chassis 10, a left connecting seat 31 and a right connecting seat 31 are arranged on the bottom of the seat 30, each side of the connecting rod 21 and the connecting rod 22 is hinged between the connecting seats 11 and the connecting seats 31, the B link 22 on each side is mounted in front of the a link 21, and the a link 21 and the B link 22 and the a connection block 11 and the B connection block on each side form a four-bar structure.

The connecting rod A21 and the articulated one end of B connecting seat 31 still have draw-in groove 23, install a clamping axle 24 between 2B connecting seats, clamping axle 24 can be in 2 between the B connecting seat 31 motion, clamping axle 24 can block in with break away from draw-in groove 23, still be equipped with on the B connecting seat 31 and draw-in the axle 25, clamping axle 24 with be connected with elastic component 26 between the draw-in axle 25, elastic component 26 is in tensile state always.

The clamping shaft 24 is fixed in the clamping groove 23 under the tensile force of the elastic piece 26 when being clamped in the clamping groove 23, so that the folding bracket 20 is fixedly locked; when a pulling force is applied to the clamping shaft 24, the clamping shaft 24 is separated from the clamping groove 23, so that the folding bracket 20 can move, and after the folding bracket 20 moves, the clamping shaft 24 can return to the clamping groove 23 under the pulling force of the elastic piece 26.

The folding 100 of the present invention thus works on the principle of: the folding chair 100 is unfolded and fixed, the clamping shaft 24 is clamped in the clamping groove 23, the clamping shaft 24 is fixed and simultaneously locks and fixes the folding bracket 20 due to the tensile force of the elastic piece 26, and the folding bracket 20 is a main body bracket of the folding chair 100.

When the folding chair 100 needs to be folded, the clamping shaft 24 is pulled to be separated from the clamping groove 23 to unlock the A connecting rod 21, the A connecting rod 21 and the B connecting rod 22 can swing downwards to fold the folding chair 100, and after the folding is completed, the clamping shaft 24 returns to the clamping groove 23 under the tensile force of the elastic piece 26, and the folding bracket 20 is fixed and locked again.

In the present embodiment, the a link 21 and the B link 22 are swing-folded backward, and in other embodiments, the a link 21 and the B link 22 may be swing-folded forward.

Preferably, a limiting member is installed in the a-link 11 and/or the B-link 31, and the movement of the a-link 21 or the B-link 22 is not continued when the folding chair 100 is unfolded.

Preferably, the a-link 21 and the B-link 22 are designed to interfere with each other when the folding chair 100 is fully unfolded, as shown in fig. 1-4, preventing further movement of each other.

Therefore, when the folding chair 100 needs to be unfolded again, the seat 20 is directly pulled to drive the folding bracket 20 to be unfolded, when the folding bracket 20 moves to a limited place, the movement is stopped, the seat 20 is downwards driven by gravity to drive the clamping shaft 24 to be clamped into the clamping groove 23 to fixedly lock the folding bracket 20, and the folding chair 100 is unfolded.

Preferably, the pulling force pulling the clamping shaft 24 out of the clamping groove 23 can be manual or automatic.

In the second embodiment, on the basis of the first embodiment, the pulling force of pulling the clamping shaft 24 to disengage from the clamping groove 23 is automatic, so that the clamping shaft 24 is connected with a braking component, the braking component pulls the clamping shaft 24 to disengage from the clamping groove 23, the braking component can be a mature braking component such as a push rod motor, a gas spring, and the like, and preferably, the clamping shaft 24 can be reset under the pushing force of the braking component or under the pulling force of the elastic piece 26.

In the third embodiment, the pulling force for pulling the clamping shaft 24 out of the clamping groove 23 is manual based on the first embodiment, as shown in fig. 1-4, a folding chair 100 of the invention further comprises a pull rod 27 and a pull handle 28, wherein the pull rod 27 is hinged with the clamping shaft 24, the pull handle 28 is hinged with the pull rod 27, and the pull handle 28 is hinged with a seat 30 through a connecting lug 29.

Pulling the pull handle 28 pulls the clamping shaft 24 to be separated from the clamping groove 23 through the pull rod 27, so that the folding chair 100 can begin to fold. After the folding chair 100 is folded, the clamping shaft 24 is reset and clamped into the clamping groove 23 under the tension of the elastic piece 26. The seat 20 is pulled to move upwards and forwards to drive the folding bracket 20 to open, when the folding bracket 20 moves to a limiting place, the seat 20 is driven downwards under the action of gravity to drive the clamping shaft 24 to be clamped into the clamping groove 23 to fixedly lock the folding bracket 20, and the folding chair 100 is unfolded.

Preferably, a torsion spring is further arranged between the pull handle 28 and the connecting lug 29, so that the pull handle 28 can be automatically reset.

In the fourth embodiment, the seat 30 of the folding chair 100 of the present invention further includes a seat 32, a backrest 33, and armrests 34, wherein the seat 32 is hinged to the backrest 33, and the backrest 32 is rotatably folded around the seat 32 to be parallel to the seat 32.

As shown in fig. 1-4, the seat 32 is provided with a bracket 35, a support 36 is arranged below the seat back 33, the seat 32 is hinged with the seat back 33 through the bracket 35 and the support 36, the seat back 33 can be folded around the bracket 35 in a rotating way, the invention further comprises a stop mechanism which can be inserted into and separated from the space between the bracket and the support, when the stop mechanism is inserted between the bracket and the support, the seat back is fixed, and when the stop member is separated from the space between the bracket and the support, the seat back can rotate around the bracket.

As shown in fig. 4, the stop mechanism comprises a sleeve 37 and a stop 38, the sleeve 37 is mounted below the support 36, the sleeve 37 is provided with the stop 38, the stop 38 can move freely in the sleeve, and the stop 38 can be inserted into and separated from the support 25 and the support 36. The seatback 33 is fixed against rotational folding about the bracket 35 when the stopper is inserted into the bracket 35 and the seat 36, and the seatback 33 is rotatable folding about the bracket 35 when the stopper 38 is disengaged from the bracket 35 and the seat 36.

In this embodiment, as shown in an enlarged view of the sleeve 37 and the stopper 38 in fig. 4, an end portion of the sleeve 37 is formed into a wedge shape 37-1, and the stopper 38 includes a lever 38-1, a stopper pin 38-2 connected to the lever 38-1, and a spring 38-3 fitted over the stopper pin 38-2.

The principle of operation of the stop 38 is: when the seat back 33 needs to be unfolded and fixed, the deflector rod 38-1 is in an upward position, the stop pin 38-2 is inserted into the bracket 35 and the support 36, the deflector rod 38-1 is embedded into the wedge 37-1 of the sleeve 37, the spring 38-3 is compressed, and the deflector rod 38-1 times of the wedge 37-1 is fixed and cannot move.

When the chair back 33 needs to be folded, the deflector rod 38-1 is downwards broken, the deflector rod 38-1 moves outwards under the elastic force of the spring 38-3, the stop pin 38-2 is separated from the support 35 and the support 36, and the chair back 33 can be folded in a rotating way around the support 35.

In the fourth embodiment, based on the previous embodiment, the armrest 34 is hinged to the chair back 32, and a bead spring pin is installed at the hinge position of the armrest 34 and the chair back 32, when the armrest 34 is broken off without external force, the armrest 34 can rotate around the armrest, and when the armrest 34 rotates to a corresponding position, the bead spring pin locks the armrest 34.

Preferably, the folding chair 100 becomes a movable wheelchair when the upper moving wheel is installed on the chassis 10 of the folding chair 100.

In summary, the invention provides a folding chair and a folding wheelchair, and provides a novel folding mode, which has the advantages of simple specific design, exquisite structure, low cost and the like.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The folding support is hinged between the chassis and the seat, the folding support comprises a left connecting rod, a right connecting rod and a left connecting rod, the B connecting rod on each side is arranged in front of the A connecting rod, two left connecting seats and right connecting seats are arranged on the chassis, two left connecting seats and two right connecting seats are arranged at the bottom of the seat, the A connecting rod and the B connecting rod on the same side are respectively hinged between the A connecting seat and the B connecting seat on the same side, and the A connecting rod, the B connecting rod, the A connecting seat and the B connecting seat on each side form a four-connecting-rod structure; the clamping groove is formed in one end, hinged to the seat, of the connecting rod A, the clamping shaft is arranged at the lower end of the seat, and the clamping shaft can be separated from and clamped into the clamping groove;

the connecting rod A is also provided with a pull shaft, an elastic piece is arranged between the pull shaft and the clamping shaft, and the elastic piece is always in a stretching state;

the device also comprises a pull rod and a pull handle, wherein the pull rod is hinged with the clamping shaft, and the pull handle is hinged with the pull rod;

the pull handle is hinged to the seat through a connecting lug;

the seat comprises a seat and a seat back, wherein the seat is provided with a bracket, the seat back is provided with a support, and the bracket is hinged with the support; the chair further comprises a stop mechanism which can be inserted into and separated from the space between the bracket and the support, wherein the chair back is fixed when the stop mechanism is inserted between the bracket and the support, and the chair back can rotate around the bracket when the stop mechanism is separated from the space between the bracket and the support;

the stop mechanism comprises a sleeve and a stop piece, wherein the sleeve is arranged on the support, one end of the sleeve is wedge-shaped, the stop piece comprises a deflector rod, a stop pin and a spring, the deflector rod is connected with the stop pin, the spring is sleeved on the stop pin, and when the deflector rod is upwards placed into the wedge-shaped part of the sleeve, the chair back is fixed and cannot rotate.

2. The folding chair as in claim 1, further comprising a braking member mounted on the chair, the latch being coupled to the braking member.

3. A folding chair as claimed in claim 2, wherein the braking component is a push rod motor or a gas spring or a hydraulic component or a gas-liquid mixing component.

4. A folding chair according to claim 3, further comprising an armrest hinged to the chair back, wherein the armrest is provided with a bead spring pin at the hinge of the armrest to the chair back.

5. The folding chair as claimed in any one of claims 1 to 4, wherein a moving wheel is attached to the chassis.