CN217040534U

CN217040534U - Wheel chair

Info

Publication number: CN217040534U
Application number: CN202220489158.XU
Authority: CN
Inventors: 苏再军; 默辰星
Original assignee: Shaoyang University
Current assignee: Shaoyang University
Priority date: 2022-03-08
Filing date: 2022-03-08
Publication date: 2022-07-26
Anticipated expiration: 2032-03-08

Abstract

The utility model provides a wheelchair, include: the backrest comprises a seat, wherein the rear end of the seat is provided with a backrest, and the backrest comprises a backrest body fixed on the seat and a movable backrest slidably arranged on the seat; a seat cushion rotatably mounted to the seat; the driving assembly is arranged on the seat and comprises a driver arranged on the seat and a lead screw rotationally connected with the driver; the linkage assembly is movably installed on the seat and comprises a lead screw nut matched with the lead screw, a first push rod and a second push rod which are rotatably installed on the lead screw nut, a sliding block which is rotatably installed on the first push rod, and two lifting rods which are respectively fixed on two sides of the sliding block and are in rotatable contact with the bottom surface of the cushion, wherein the second push rod is rotatably connected with the movable backrest. The utility model provides a cushion of wheelchair when helping the user to get up, removes the back and can also provide the support for the user gets up for the user is safe and reliable more when getting up.

Description

Wheel chair

Technical Field

The utility model relates to the technical field of wheelchair appliances, in particular to a wheelchair.

Background

Wheelchair users are mostly people with inconvenient legs and feet, such as disabled people, patients or old people, and usually need to sit on a wheelchair to walk.

When a wheelchair user gets up, the center of gravity moves upwards, large leg strength is needed to overcome the weight of the body, and the legs and the feet of the wheelchair user are inconvenient; in the prior art, a plurality of intelligent wheelchairs help a user to rise through overturning a cushion, but the user only supports the cushion when rising, and the back does not have a supporting point, so that the user is not safe when rising.

Therefore, there is still a need to provide a new wheelchair to solve the above problems.

SUMMERY OF THE UTILITY MODEL

To the above problems in the prior art, the utility model provides a wheelchair that can help the user to get up and simultaneously can also provide the support for the user.

The utility model provides a technical scheme that technical problem adopted as follows:

a wheelchair, comprising: the backrest comprises a backrest body fixed on the seat and a movable backrest slidably mounted on the seat; a seat cushion rotatably mounted to the seat; the driving assembly is arranged on the seat and comprises a driver arranged on the seat and a lead screw rotationally connected with the driver; the linkage assembly is movably installed in the seat, the linkage assembly comprises a lead screw nut matched with the lead screw, a first push rod and a second push rod which are respectively and rotatably installed on the lead screw nut, a sliding block which is rotatably installed on the first push rod, two lifting rods which are respectively fixed on two sides of the sliding block and are in rotatable contact with the bottom surface of the cushion, and the second push rod is rotatably connected with the movable backrest.

Preferably, the seat comprises front and rear wheels mounted to the front and rear ends thereof, respectively; two extending parts extending downwards are arranged below the movable backrest, and the tail ends of the two extending parts are respectively provided with two connecting parts extending to the rear wheels on the same side; the seat is provided with first guide rails corresponding to the positions of the two connecting parts respectively, and the tail ends of the two connecting parts are slidably mounted on the first guide rails respectively.

Preferably, one side of the seat close to the backrest is provided with a support extending horizontally towards the front wheel, one side of the support far away from the backrest is provided with a guide rod extending downwards, and the sliding block is movably arranged on the guide rod.

Preferably, the screw nut includes a body portion and two cross bars extending from two sides of the body portion to the rear wheel on the same side, the seats are respectively provided with second guide rails corresponding to the end positions of the two cross bars, and the ends of the two cross bars are slidably mounted on the second guide rails respectively.

Preferably, one end of the first push rod is rotatably mounted on one side of the main body close to the seat cushion, and the other end of the first push rod is rotatably connected with the sliding block.

Preferably, the number of the second push rods is two, one end of each of the two second push rods is rotatably mounted on one side, close to the seat cushion, of the corresponding cross rod, and the other end of each of the two second push rods is rotatably mounted on the corresponding connecting portion.

Preferably, pulleys are respectively arranged at one ends of the two lifting rods close to the bottom surface of the seat cushion, and the pulleys are in rotatable contact with the bottom surface of the seat cushion.

Preferably, the two sides of the seat close to the rear wheel are respectively provided with an armrest, the bottom surface of the armrest is provided with a third guide rail and a connecting rod, one end of the connecting rod is respectively rotatably connected with the bottom surface of the armrest and the third guide rail, and the other end of the connecting rod is respectively rotatably connected with the cross rod and the seat.

Preferably, the link comprises 2n sub-links (n is a positive integer); when n is 1, the connecting rod comprises a first auxiliary rod and a second auxiliary rod, and the first auxiliary rod is rotatably connected with the midpoint of the second auxiliary rod; one end of the first auxiliary rod is rotatably arranged on the bottom surface of the handrail, and the other end of the first auxiliary rod is rotatably arranged on the cross rod; one end of the second auxiliary rod is rotatably and slidably mounted on the third guide rail, and the other end of the second auxiliary rod is rotatably mounted on the seat.

Compared with the prior art, the utility model discloses mainly have following beneficial effect:

the user sits on the cushion, the drive assembly drive the linkage subassembly removes, the linkage subassembly will when the cushion jack-up, it follows to remove the back the linkage subassembly to the seat front end removes, moreover the connecting rod is followed the linkage subassembly removes will handrail jack-up, the cushion is when helping the user to get up, remove the back with the handrail can also provide the support for the user gets up for user safe and reliable more when getting up.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a wheelchair provided by the present invention;

FIG. 2 is a schematic view of a part of the structure of the wheelchair provided by the present invention;

fig. 3 is an exploded schematic view of the wheelchair provided by the present invention.

Detailed Description

In order to better understand the technical solution of the present application, the following detailed description is made with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

The wheelchair 100 provided by the embodiment of the present application includes: seat 1, cushion 2, drive assembly 3, linkage assembly 4, handrail 5.

Specifically, the seat 1 has a front wheel 10 and a rear wheel 11 respectively mounted on the front end and the rear end thereof, and the rear wheel 11 is provided with a motor 111 for driving the rear wheel 11 to rotate so as to drive the wheelchair 100 to move forward or backward; the seat 1 is further provided with a backrest 12, the backrest 12 comprises a backrest body 121 and a movable backrest 122, the backrest body 121 is fixedly installed at the rear end of the seat 1, two extension portions 1221 extending downwards are arranged below the movable backrest 122, and the ends of the two extension portions 1221 are respectively provided with two connecting portions 1222 extending towards the rear wheel 11 on the same side; the seat 1 is provided with a first guide rail 13 at a position corresponding to the two connecting parts 1222, and the ends of the two connecting parts 1222 are slidably mounted on the first guide rail 13 respectively; the seat 1 is provided with a support piece 15 which horizontally extends towards the front wheel 10 and is close to one side of the backrest 12, the support piece is provided with a guide rod 16 which extends downwards and is far away from one side of the backrest 12, the support piece 15 and the guide rod 16 can support the seat cushion 2, and the guide rod 16 can provide a guiding effect for the seat cushion 2 to overturn.

The seat cushion 2 is rotatably arranged at the front end of the seat 1, a user can sit on the seat cushion 2, and the seat cushion 2 can be arranged at the front end of the seat 1 through a hinge; when the seat cushion 2 is in a horizontal state, the seat 1 and the support piece 15 can bear the pressure of the seat cushion 2, and the seat cushion 2 can turn around the front end of the seat 1 under the matching of the driving component 3 and the linkage component 4.

The driving assembly 3 comprises a screw 31 and a driver 32, and the linkage assembly 4 comprises a screw nut 41 sleeved on the screw 31 and matched with the screw 31, a first push rod 42 and a second push rod 43 respectively rotatably mounted on the screw nut 41, a slider 44 rotatably mounted on the first push rod 42 and sleeved on the guide rod 16, and two lifting rods 45 respectively fixed on two sides of the slider 44 and rotatably contacted with the bottom surface of the seat cushion 2.

Specifically, the lead screw nut 41 includes a main body 411 and two cross bars 412 extending from two sides of the main body 411 to the same side of the rear wheel 11; the seat 1 is provided with second guide rails 14 at positions corresponding to the ends of the two crossbars 412, and the ends of the two crossbars 412 are slidably mounted on the second guide rails 14 respectively; one end of the first push rod 42 is rotatably mounted on one side of the body 411 close to the seat cushion 2, and the other end is rotatably connected with the slide block 44; the two second push rods 43 are respectively located at two sides of the first push rod 42, one end of each of the two second push rods 43 is respectively rotatably mounted on one side of the two cross rods 412 close to the seat cushion 2, and the other end of each of the two second push rods 43 is respectively rotatably mounted on the two connecting portions 1222; pulleys 451 are respectively arranged at one ends of the two lifting rods 45, which are close to the bottom surface of the seat cushion 2, and the pulleys 451 can effectively reduce the friction force applied to the seat cushion in the lifting process.

When the screw rod 31 drives the screw nut 41 to move forward, the first push rod 42 pushes the slider 44 to ascend along the guide rod 16, the lifting rod 45 ascends along the slider 44 to jack up the seat cushion 2 to turn over around the front end of the seat 1, and in the process of moving forward of the screw nut 41, the two cross rods 412 move forward along the second guide rail 14 and pull the second push rod 43 to drive the movable backrest 12 to move forward along the first guide rail 13, so that the design enables the movable backrest 12 to move forward while the seat cushion 2 turns upward, and supports are provided for a user when the user gets up, so that the user is safer and more reliable when getting up.

Armrests 5 are respectively arranged on two sides of the seat 1 close to the rear wheels 11, and the armrests 5 are respectively and rotatably connected with the seat 1 and the two cross bars 412 through connecting rods 51; specifically, the bottom surface of the armrest 5 is provided with a third guide rail 52, the link 51 comprises a first sub-lever 511, a second sub-lever 512, a third sub-lever 513 and a fourth sub-lever 514, the first sub-lever 511 is crossed and rotatably connected with the midpoint of the second sub-lever 512, the third sub-lever 513 is crossed and rotatably connected with the midpoint of the fourth sub-lever 514, one end of the first sub-lever 512 is rotatably connected with the bottom surface of the armrest 5, the other end of the first sub-lever 512 is rotatably connected with one end of the third sub-lever 513, and the other end of the third sub-lever 513 is rotatably connected with the seat 1; one end of the second auxiliary lever 512 is slidably and rotatably connected to the third rail 52, the other end thereof is rotatably connected to one end of the fourth auxiliary lever 514, and the other end of the fourth auxiliary lever 514 is rotatably connected to the cross bar 412; when the lead screw nut 41 drives the cross bar 412 to move forward, one end of the second auxiliary rod 512 slides along the third guide rail 52, one end of the fourth auxiliary rod 514 slides along the second guide rail 14 along with the cross bar 412, so that the height of the connecting rod 51 is increased, and the armrest 5 is also increased; the design is that when the seat cushion 2 is turned upwards and the movable backrest 12 is also moved forwards, the armrest 5 is lifted along with the connecting rod 51, and the armrest 5 can provide support for a user when the user rises, so that the user is safer and more reliable when the user rises.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A wheelchair, comprising:

the backrest comprises a backrest body fixed on the seat and a movable backrest slidably mounted on the seat;

a seat cushion rotatably mounted to the seat;

the driving assembly is arranged on the seat and comprises a driver arranged on the seat and a lead screw rotationally connected with the driver;

the linkage assembly is movably installed in the seat, the linkage assembly comprises a lead screw nut matched with the lead screw, a first push rod and a second push rod which are respectively and rotatably installed on the lead screw nut, a sliding block which is rotatably installed on the first push rod, two lifting rods which are respectively fixed on two sides of the sliding block and are in rotatable contact with the bottom surface of the cushion, and the second push rod is rotatably connected with the movable backrest.

2. The wheelchair of claim 1 wherein the seat includes front and rear wheels mounted at front and rear ends thereof, respectively; two extending parts extending downwards are arranged below the movable backrest, and the tail ends of the two extending parts are respectively provided with two connecting parts extending towards the rear wheel on the same side; the seat is provided with first guide rails corresponding to the positions of the two connecting parts respectively, and the tail ends of the two connecting parts are slidably mounted on the first guide rails respectively.

3. A wheelchair in accordance with claim 2 wherein the seat has a support extending horizontally towards the front wheel adjacent the backrest, and a downwardly extending guide bar on the side of the support remote from the backrest, the slide being movably mounted to the guide bar.

4. The wheelchair of claim 3, wherein the lead screw nut comprises a body and two cross bars extending from two sides of the body to the rear wheels on the same side, the seat is provided with second guide rails corresponding to the ends of the two cross bars, and the ends of the two cross bars are slidably mounted on the second guide rails.

5. The wheelchair of claim 4 wherein the first push rod is pivotally mounted at one end to the body portion adjacent the seat cushion and at the other end to the slide.

6. The wheelchair of claim 5 wherein the number of the second push rods is two, one end of each of the two second push rods is rotatably mounted on one side of the two cross bars close to the seat cushion, and the other end of each of the two second push rods is rotatably mounted on the two connecting portions.

7. A wheelchair in accordance with claim 6, wherein the two lifting rods are provided with respective pulleys at ends thereof adjacent to the bottom surface of the seat cushion, the pulleys being in rotatable contact with the bottom surface of the seat cushion.

8. The wheelchair of claim 7, wherein the seat is further provided with armrests on both sides near the rear wheels, the bottom surfaces of the armrests are provided with third guide rails and connecting rods, one end of each connecting rod is rotatably connected with the bottom surfaces of the armrests and the third guide rails, and the other end of each connecting rod is rotatably connected with the cross bar and the seat.

9. The wheelchair of claim 8 wherein the linkage comprises 2n secondary rods, wherein n is a positive integer; when n is 1, the connecting rod comprises a first auxiliary rod and a second auxiliary rod, and the first auxiliary rod is rotatably connected with the midpoint of the second auxiliary rod; one end of the first auxiliary rod is rotatably arranged on the bottom surface of the handrail, and the other end of the first auxiliary rod is rotatably arranged on the cross rod; one end of the second auxiliary rod is rotatably and slidably mounted on the third guide rail, and the other end of the second auxiliary rod is rotatably mounted on the seat.