阅读说明：本技术 一种便携式轮椅 (Portable wheelchair ) 是由 蒙润雷 杨高远 于 2021-10-19 设计创作，主要内容包括：本发明提供的便携式轮椅,包括：座椅；靠背,所述靠背设置于所述座椅的一侧；上扶手,所述上扶手设置于所述靠背上,且所述上扶手上设置有液压伸缩机构；凸轮,所述凸轮设置于所述座椅与所述靠背的铰接处；连杆,所述连杆设置于所述靠背内。本发明的轮椅,通过设置可伸缩的上扶手,并利用凸轮和拉杆在靠背放倒的过程中实现上扶手的伸缩,从而有效的克服现有技术中无支撑或者需要陪护人员进行辅助支撑,而且自动笔按压切换组件能够保证凸轮、压杆和拉杆之间的配合可靠,同时设置活塞和丝杠能够使上扶手旋转实现对患者腋下的支撑,使患者通过腋下的支撑力将身体支撑抬离座椅而方便脱下下半身的衣服,方便患者独自使用。(The invention provides a portable wheelchair comprising: a seat; a backrest disposed at one side of the seat; the upper handrail is arranged on the backrest and is provided with a hydraulic telescopic mechanism; the cam is arranged at the hinge joint of the seat and the backrest; a connecting rod disposed within the backrest. According to the wheelchair, the telescopic upper handrail is arranged, and the cam and the pull rod are utilized to realize the telescopic of the upper handrail in the process of falling the backrest, so that the defect that no support exists in the prior art or an attendant needs to perform auxiliary support is effectively overcome, the automatic pen pressing switching component can ensure the reliable matching among the cam, the press rod and the pull rod, and meanwhile, the piston and the lead screw are arranged to enable the upper handrail to rotate to support the armpit of a patient, so that the patient can lift the body support away from the chair through the supporting force of the armpit, the clothes of the lower half of the body can be conveniently taken off, and the patient can use the wheelchair independently.)

1. A wheelchair, comprising:

a seat (1);

a backrest (2), the backrest (2) being provided on one side of the seat (1);

the upper armrest (3) is arranged on the backrest (2), and a hydraulic telescopic mechanism is arranged on the upper armrest (3);

a cam (4), wherein the cam (4) is arranged at the hinge joint of the seat (1) and the backrest (2);

the connecting rod (5) is arranged in the backrest (2), and the connecting rod (5) can be driven by the cam (4) to open and close the hydraulic switch of the hydraulic telescopic mechanism.

2. The wheelchair according to claim 1, further comprising an automatic pen depression switching assembly (6), wherein the automatic pen depression switching assembly (6) is disposed inside the link (5), and one end of the automatic pen depression switching assembly (6) protrudes out of the link (5) to abut against the outer surface of the cam (4).

3. The wheelchair according to claim 2, characterized in that the automatic pen depression switching assembly (6) comprises:

the limiting mechanism (61) is fixedly arranged in the connecting rod (5), the limiting mechanism (61) is provided with a first limiting position and a second limiting position, and a height difference exists between the first limiting position and the second limiting position;

the pressing rod (62) is arranged in the connecting rod (5), the first end of the pressing rod (62) protrudes out of the connecting rod (5) and is abutted against the cam (4), and a limiting protrusion (64) which can be switched and abutted against the first limiting position and the second limiting position is arranged on the peripheral side of the pressing rod (62);

the resetting mechanism (63) is arranged in the connecting rod (5), one end of the resetting mechanism (63) is fixedly arranged on the inner surface of the connecting rod (5), and the other end of the resetting mechanism (63) is abutted against the pressure rod (62);

when the limit protrusion (64) is abutted against the first limit position, the hydraulic switch is in an open state;

when the limit protrusion (64) abuts against the second limit position, the hydraulic switch is in a closed state.

4. The wheelchair according to claim 3, wherein the limit mechanism (61) comprises a rotating member, the rotating member is sleeved on the pressure lever (62), and a plurality of first limit positions and second limit positions are arranged on the rotating member, all the first limit positions and all the second limit positions are arranged at intervals, and when the cam (4) presses the pressure lever (62), the limit protrusion (64) is switched to be in abutting relation with the first limit positions and the second limit positions.

5. Wheelchair according to claim 3, characterized in that a guide ramp is provided between the first limit position and the second limit position, along which guide ramp the limit projection (64) slides between the first limit position and the second limit position.

6. Wheelchair according to claim 3, characterized in that the cam (4) has a cross-section in the shape of a "concave" and that the first end of the strut (62) can slide into or out of the opening of the cam (4) when relative rotation is produced between the backrest (2) and the seat (1).

7. Wheelchair according to claim 6, wherein the opening of the cam (4) faces away from the seat (1), the wheelchair having a lying position and a sitting position, the first end of the strut (62) abutting the inside of the opening of the cam (4) when the wheelchair is in the lying position and the first end of the strut (62) abutting the outside of the opening of the cam (4) when the wheelchair is in the sitting position.

8. The wheelchair according to claim 3, wherein the hydraulic telescoping mechanism comprises a hydraulic cylinder (71), a telescoping piston (72) and a support rod (73), the telescoping piston (72) is movably arranged in the hydraulic cylinder (71), the support rod (73) is arranged on the telescoping piston (72), a hydraulic inlet is arranged on the hydraulic cylinder (71), a blocking piece is arranged on the connecting rod (5), the blocking piece can move along with the connecting rod (5) and open or close the hydraulic inlet, and the blocking piece forms the hydraulic switch.

9. The wheelchair according to claim 7, wherein the wheelchair has a lying position and a sitting position, wherein the backrest (2) and the seat (1) have a first angle and the limit projection (64) abuts the first limit position when the wheelchair is in the lying position, wherein the backrest (2) and the seat (1) have a second angle and the limit projection (64) abuts the second limit position when the wheelchair is in the sitting position, and wherein the first angle is larger than the second angle.

10. The wheelchair of claim 1 further comprising:

the shell (8) is arranged in the backrest (2), and a hydraulic cavity is formed in the shell (8);

the lead screw (81), the lead screw (81) is arranged in the shell (8), a lead screw nut is arranged on the shell (8), the lead screw (81) is in threaded fit with the lead screw nut, the connecting rod (5) is arranged in the lead screw (81), and the limiting mechanism (61) is arranged on the inner surface of the lead screw (81);

a piston (82), wherein the piston (82) is arranged on the lead screw (81), and the piston (82) is movably arranged in the hydraulic cavity;

the upper armrest (3) is arranged at one end, far away from the seat (1), of the screw rod (81), and the upper armrest (3) can move up and down and rotate along with the screw rod (81).

Technical Field

The invention relates to the technical field of articles for daily use, in particular to a portable wheelchair.

Background

At present, many people have inconvenience in movement due to illness or accident, other tools for riding instead of walk are needed, the wheelchair is simple in structure and convenient to use, and the wheelchair is the best choice, but the existing wheelchair has certain defects, for example, when a patient needs to lie flat for rest, the existing wheelchair only directly puts down a backrest, and does not have any structure for supporting the backrest, so that the problem of overturning exists, and even if a supporting structure is arranged, the patient cannot support by using the supporting structure by himself, and still needs accompanying personnel for auxiliary operation.

Disclosure of Invention

The invention provides a wheelchair with an upper armrest capable of automatically extending for supporting after a backrest is laid down, which aims to solve the problem that the wheelchair is inconvenient to use due to no supporting structure or the need of auxiliary operation of a caregiver in the prior art.

To this end, a wheelchair is provided comprising:

a seat;

a backrest disposed at one side of the seat;

the upper handrail is arranged on the backrest and is provided with a hydraulic telescopic mechanism;

the cam is arranged at the hinge joint of the seat and the backrest;

the connecting rod is arranged in the backrest and can be driven by the cam to open and close the hydraulic switch of the hydraulic telescopic mechanism.

The wheelchair further comprises an automatic pen pressing and switching assembly, the automatic pen pressing and switching assembly is arranged in the connecting rod, and one end of the automatic pen pressing and switching assembly protrudes out of the connecting rod and is abutted to the outer surface of the cam.

The automatic pen press switch assembly includes:

the limiting mechanism is fixedly arranged in the connecting rod and is provided with a first limiting position and a second limiting position, and a height difference is formed between the first limiting position and the second limiting position;

the compression bar is arranged in the connecting rod, a first end of the compression bar protrudes out of the connecting rod and is abutted against the cam, and a limiting bulge capable of being switched and abutted against the first limiting position and the second limiting position is arranged on the peripheral side of the compression bar;

the resetting mechanism is arranged in the connecting rod, one end of the resetting mechanism is fixedly arranged on the inner surface of the connecting rod, and the other end of the resetting mechanism is abutted against the pressure rod;

when the limit bulge is abutted against the first limit position, the hydraulic switch is in an open state;

when the limit bulge is abutted against the second limit position, the hydraulic switch is in a closed state.

Stop gear includes the rotating member, the rotating member cover is located on the depression bar, just be provided with a plurality of first limit position and second limit position on the rotating member, all first limit position and all the second limit position sets up at an interval each other, and the cam extrusion during the depression bar, spacing protruding switch with the butt relation of first limit position and second limit position.

A guide inclined plane is arranged between the first limit position and the second limit position, and the limit bulge slides between the first limit position and the second limit position along the guide inclined plane.

The cross section of the cam is concave, and when the backrest and the seat rotate relatively, the first end of the pressure lever can slide into or out of the opening of the cam.

The opening of the cam faces the direction far away from the seat, the wheelchair has a lying state and a sitting state, when the wheelchair is in the lying state, the first end of the pressing rod is abutted to the inner part of the opening of the cam, and when the wheelchair is in the sitting state, the first end of the pressing rod is abutted to the outer part of the opening of the cam.

The hydraulic telescoping mechanism comprises a hydraulic cylinder, a telescopic piston and a supporting rod, the telescopic piston is movably arranged in the hydraulic cylinder, the supporting rod is arranged on the telescopic piston, a hydraulic inlet is formed in the hydraulic cylinder, a plugging piece is arranged on the connecting rod, the plugging piece can move along with the connecting rod and is opened, the hydraulic inlet is formed in the hydraulic inlet, and the plugging piece is formed in the hydraulic switch.

The wheelchair has the state of lying flat and position of sitting state, works as when the wheelchair is in the state of lying flat, the back with the seat has first contained angle, spacing arch with first spacing position butt, works as when the wheelchair is in the position of sitting state, the back with the seat has the second contained angle, spacing arch with second spacing position butt, first contained angle is greater than the second contained angle.

The wheelchair further comprises:

the shell is arranged in the backrest, and a hydraulic cavity is formed in the shell;

the lead screw is arranged in the shell, a lead screw nut is arranged on the shell, the lead screw is in threaded fit with the lead screw nut, the connecting rod is arranged in the lead screw, and the limiting mechanism is arranged on the inner surface of the lead screw;

the piston is arranged on the lead screw and movably arranged in the hydraulic cavity;

the upper armrest is arranged at one end, far away from the seat, of the screw rod, and can move up and down and rotate along with the screw rod.

According to the wheelchair, the telescopic upper handrail is arranged, and the cam and the pull rod are utilized to realize the telescopic of the upper handrail in the process of falling the backrest, so that the defect that no support exists in the prior art or an attendant needs to perform auxiliary support is effectively overcome, the automatic pen pressing switching component can ensure the reliable matching among the cam, the press rod and the pull rod, and meanwhile, the piston and the lead screw are arranged to enable the upper handrail to rotate to support the armpit of a patient, so that the patient can lift the body support away from the chair through the supporting force of the armpit, the clothes of the lower half of the body can be conveniently taken off, and the patient can use the wheelchair independently.

Drawings

The invention will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of a wheelchair according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a cam, linkage, automatic pen depression switch assembly, and lead screw and piston of an embodiment of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

1. A seat; 2. a backrest; 3. an upper armrest; 4. a cam; 5. a connecting rod; 6. an automatic pen press switching assembly; 61. a limiting mechanism; 62. a pressure lever; 63. a reset mechanism; 64. a limiting bulge; 71. a hydraulic cylinder; 72. a telescopic piston; 73. a support bar; 8. a housing; 81. a lead screw; 82. a piston;

Detailed Description

The invention will be further explained with reference to the drawings.

As shown in fig. 1 and 2, the wheelchair of the present invention comprises a seat 1, a backrest 2, an upper armrest 3, a cam 4, and a link 5, the backrest 2 being provided at one side of the seat 1; the upper handrail 3 is arranged on the backrest 2, and a hydraulic telescopic mechanism is arranged on the upper handrail 3; the cam 4 is arranged at the hinge joint of the seat 1 and the backrest 2; the connecting rod 5 is arranged in the backrest 2, and the connecting rod 5 can be driven by the cam 4 to open and close the hydraulic switch of the hydraulic telescopic mechanism. When the backrest 2 needs to be laid down by a patient, the backrest 2 and the seat 1 rotate relatively, the cam 4 exerts an acting force on the connecting rod 5, the hydraulic switch on the upper armrest 3 is opened by the connecting rod 5, the hydraulic telescopic mechanism of the upper armrest 3 starts to work to increase the length of the upper armrest 3, and finally, when the backrest 2 is laid flat, the end part of the upper armrest 3 is abutted against the ground to complete the support of the backrest 2; when the backrest 2 is reset, the cam 4 generates acting force on the connecting rod 5 again, the connecting rod 5 is also reset, the hydraulic switch is turned off at the moment, the hydraulic telescopic mechanism of the upper handrail 3 starts to shorten the length under the condition of no high-pressure hydraulic pressure, and finally when the backrest 2 is reset to be used for the back of a patient to lean on, the upper handrail 3 just restores to the original shape.

The wheelchair further comprises an automatic pen pressing and switching assembly 6, wherein the automatic pen pressing and switching assembly 6 is arranged in the connecting rod 5, and one end of the automatic pen pressing and switching assembly 6 protrudes out of the connecting rod 5 and is abutted against the outer surface of the cam 4. After the cam 4 acts on the link 5, the automatic pen pressing switching assembly 6 also generates corresponding movement, so that the link 5 is limited to the corresponding position to ensure that the hydraulic switch is always opened, and after the cam 4 acts on the link 5 again, the automatic pen pressing switching assembly 6 also generates corresponding movement, so that the link 5 is reset to another position to close the hydraulic switch.

The automatic pen press switching assembly 6 includes: the limiting mechanism 61 is fixedly arranged in the connecting rod 5, the limiting mechanism 61 is provided with a first limiting position and a second limiting position, and a height difference is formed between the first limiting position and the second limiting position; a pressing rod 62, wherein the pressing rod 62 is arranged in the connecting rod 5, a first end of the pressing rod 62 protrudes out of the connecting rod 5 and is abutted against the cam 4, and a limit protrusion 64 capable of being switched and abutted against the first limit position and the second limit position is arranged on the peripheral side of the pressing rod 62; the resetting mechanism 63 is arranged in the connecting rod 5, one end of the resetting mechanism 63 is fixedly arranged on the inner surface of the connecting rod 5, and the other end of the resetting mechanism 63 is abutted against the pressure rod 62; when the limit protrusion 64 abuts against the first limit position, the hydraulic switch is in an open state; when the limit projection 64 abuts against the second limit position, the hydraulic switch is in an off state. The relation between the connecting rod 5 and the hydraulic switch is controlled by utilizing the height difference between the first limit position and the second limit position, so that the connecting rod 5 is driven, and the hydraulic switch is finally turned on and turned off. When the cam 4 presses the first end of the pressing rod 62, the pressing rod 62 is forced to move, at this time, because the limit protrusion 64 is abutted to the second limit position, when the pressing rod 62 moves, the pulling rod is also moved simultaneously, the hydraulic switch is opened, simultaneously the reset mechanism 63 is pressed, and the limit mechanism 61 moves to enable the limit protrusion 64 to be abutted to the first limit position. When the cam 4 presses the first end of the pressing rod 62 again, the pressing rod 62 is forced to move again, at this time, the limiting mechanism 61 also moves simultaneously to enable the limiting protrusion 64 to be abutted against the second limiting position, at this time, the pull rod has no supporting force and moves reversely under the resetting action of the resetting mechanism 63, at the same time, the hydraulic switch is turned off, and the upper handrail 3 is reset to the original state.

Stop gear 61 includes the rotating member, the rotating member cover is located on the depression bar 62, just be provided with a plurality of first limit position and second limit position on the rotating member, all first limit position and all the second limit position sets up at an interval each other, and is in cam 4 extrusion during the depression bar 62, spacing arch 64 switch with the butt relation of first limit position and second limit position.

A guide inclined plane is arranged between the first limit position and the second limit position, and the limit bulge 64 slides between the first limit position and the second limit position along the guide inclined plane.

The cross section of the cam 4 is concave, and when the backrest 2 and the seat 1 rotate relatively, the first end of the pressure lever 62 can slide into or out of the opening of the cam 4. The first end of the pressure lever 62 slides in or out at the opening of the cam 4, so that the pressure lever 62 is extruded and driven.

The opening of the cam 4 faces away from the seat 1, the wheelchair has a lying state in which the first end of the press rod 62 abuts against the inside of the opening of the cam 4, and a sitting state in which the first end of the press rod 62 abuts against the outside of the opening of the cam 4.

The hydraulic telescopic mechanism comprises a hydraulic cylinder 71, a telescopic piston 72 and a supporting rod 73, wherein the telescopic piston 72 is movably arranged in the hydraulic cylinder 71, the supporting rod 73 is arranged on the telescopic piston 72, a hydraulic inlet is formed in the hydraulic cylinder 71, a plugging piece is arranged on the connecting rod 5, the plugging piece can move along with the connecting rod 5 and open the hydraulic inlet or close the hydraulic inlet, the plugging piece forms the hydraulic switch, when the plugging piece is moved away from the hydraulic inlet, the hydraulic inlet is opened, high-pressure hydraulic oil enters the hydraulic cylinder 71 to push the telescopic piston 72 to start to move, the supporting rod 73 is driven to move to realize the purpose of extending the upper handrail 3, when the plugging piece is moved back to the hydraulic inlet, the high-pressure hydraulic oil cannot enter the hydraulic cylinder 71, and the pressure in the hydraulic cylinder 71 is gradually reduced, the telescopic piston 72 is reset by the corresponding reset mechanism 63, and the support rod 73 moves simultaneously to shorten the upper handrail 3.

The wheelchair has the state of lying flat and position of sitting state, works as when the wheelchair is in the state of lying flat, back 2 with seat 1 has first contained angle, spacing arch 64 with first spacing position butt, works as when the wheelchair is in the position of sitting state, back 2 with seat 1 has the second contained angle, spacing arch 64 with second spacing position butt, first contained angle is greater than the second contained angle.

The wheelchair further comprises: the shell 8 is arranged in the backrest 2, and a hydraulic cavity is formed in the shell 8; the lead screw 81 is arranged in the shell 8, a lead screw nut is arranged on the shell 8, the lead screw 81 is in threaded fit with the lead screw nut, the connecting rod 5 is arranged in the lead screw 81, and the limiting mechanism 61 is arranged on the inner surface of the lead screw 81; a piston 82, wherein the piston 82 is arranged on the screw 81, and the piston 82 is movably arranged in the hydraulic cavity; the upper armrest 3 is disposed on an end of the screw 81 far from the seat 1, and the upper armrest 3 can perform lifting and rotating motions along with the screw 81. When the hydraulic cylinder 71 is filled with high-pressure hydraulic oil, the hydraulic oil drives the piston 82 to move, and because the piston 82 is provided with the lead screw 81, under the matching of the lead screw nut and the lead screw 81, the piston 82 is forced to rotate, that is, the upper handrail 3 can be simultaneously lifted and rotated under the driving of the piston 82, wherein the matching thread space between the lead screw nut and the lead screw 81 can ensure that the upper handrail 3 just rotates to a corresponding angle (such as 180 degrees) when the piston 82 moves to a set height (such as 8 cm), and the upper handrail 3 can be rotated to a corresponding angle (such as 180 degrees) just by the matching thread space between the lead screw nut and the lead screw 81

The upper armrest 3 is provided with a first position and a second position, wherein the first position is located on one side, away from the seat 1, of the backrest 2 and is used for pushing and pulling the wheelchair, the second position is used for supporting armpits of a user and lifting the user, and the adjusting mechanism drives the upper armrest 3 to be freely switched between the first position and the second position.

When the upper armrest 3 is switched to the first position, the accompanying person can move the wheelchair through the upper armrest 3 at the rear of the wheelchair, and when the patient is alone and needs to take off the clothes of the lower body to go to the toilet or change the clothes, the patient can switch the upper armrest 3 to the second position, the armpit of the patient is supported by the upper armrest 3, and the patient lifts the body off the chair 1 by the force of the upper body and the lifting force of the upper armrest 3, so that the patient can directly change or put on or take off the clothes, and the operation can be realized by only one person without the accompanying person. The operation that just can accomplish the change of clothes or wear to take off under accompanying person's help when the effectual patient that has overcome among the prior art uses the wheelchair, and use is simple and convenient.

While the invention has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.