CN104398348A - Seat width adjusting device for wheelchair - Google Patents

Abstract

The invention provides a wheelchair seat width adjustment device, which includes a first frame, a second frame and an adjustment mechanism, the adjustment mechanism is located between the first frame and the second frame, and the adjustment mechanism The distance between the first frame and the second frame can be adjusted. Compared with the prior art, the wheelchair seat width adjustment device of the present invention has a simple structure, and can perform infinite micro-adjustment of the seat width according to different practical needs of users, and has a large adjustment range.

Description

Wheelchair seat width adjustment device

technical field

The invention relates to the field of wheelchair components, in particular to a wheelchair seat width adjusting device.

Background technique

Wheelchairs are special medical equipment serving specific groups of people, such as physically disabled people, and they are a tool for travel. The improvement of wheelchair performance can improve their quality of life. With the advancement of technology, the current wheelchair structure is becoming more and more complex, and the functions are more diversified, adding functions such as electric, folding, and lifting. For example, the patent with the authorized announcement number CN101828996 B provides an adjustable seat width The folding mechanism of the wheelchair has the left and right front vertical tubes and the left and right rear vertical tubes of the wheelchair frame, and has a pair of left and right rectangular tubes hinged in an "X" shape. The left rectangular tube has a left upper tube and a left lower tube. It is adjustablely connected with the left front vertical pipe of the frame through the left directional pipe. The left lower pipe is located between the right front and rear vertical pipes of the frame and is adjustablely connected with the right front and rear vertical pipes. The right rectangular pipe has a right upper pipe and a right lower pipe. Tube, the right upper tube and the right front vertical tube are adjustable connected through the right directional tube, the right lower tube is located between the left front and rear vertical tubes of the frame, and is adjustable connected with the left front and rear vertical tubes. The folding mechanism can adjust the seat width , but the structure is complex, the seat width adjustment is small, and infinite micro-adjustment cannot be performed.

In view of the above-mentioned defects, the creator of the present invention has finally obtained the present invention through long-term research and testing.

Contents of the invention

The object of the present invention is to provide a wheelchair seat width adjustment device to overcome the above-mentioned technical defects.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a wheelchair seat width adjustment device, which includes a first frame, a second frame and an adjustment mechanism, and the adjustment mechanism is located between the first frame and the second frame. Between the two frames, the adjustment mechanism can adjust the distance between the first frame and the second frame.

Further, the adjustment mechanism includes a first adjustment tube, a second adjustment tube, a positioning tube and a screw assembly, one end of the first adjustment tube is fixedly connected to the first vehicle frame, and one end of the second adjustment tube It is fixedly connected with the second frame, the screw assembly is connected with the positioning tube and located inside the second adjusting tube, and the other end of the first adjusting tube is sleeved on the second adjusting tube Above, the positioning tube is fixedly connected to the first frame, and the screw assembly is fixedly connected to the second frame.

Further, the screw assembly includes a screw, a screw sleeve and a hexagonal head, one end of the screw rod is fixedly connected to one end of the hexagonal head, and one end of the screw sleeve is inserted into the positioning tube and fixedly connected to it As a whole, the screw rod is screwed into the screw sleeve.

Further, a first bushing is fixed inside the right end of the second adjusting pipe, and a through hole for passing through the hexagonal head is arranged on the first bushing.

Further, the hexagonal head is sheathed with the first circlip first, and then the second circlip is sheathed after passing through the through hole, and the hexagonal head is fixedly connected with the first bushing.

Further, the wheelchair seat width adjustment device further includes a guide limit assembly, and the guide limit assembly is arranged on the adjustment mechanism.

Further, the guide and limit assembly includes a second bush and a third bush, and the smallest outer diameter of the second bush is equal to the largest outer diameter of the third bush.

Further, the second bushing is inserted into the second adjusting pipe first, then the third bushing is fixedly connected to the second adjusting pipe, and then the second bushing is connected to the first adjusting pipe Fixed connection.

Compared with the prior art, the beneficial effect of the present invention is that the wheelchair seat width adjustment device of the present invention has a simple structure, and can perform infinite micro-adjustment of the seat width according to different practical needs of users, and has a large adjustment range.

Description of drawings

Fig. 1 is the structural representation of wheelchair seat width adjusting device of the present invention;

Fig. 2 is an exploded view of the wheelchair seat width adjusting device of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, a wheelchair seat width adjustment device provided by the present invention includes: a first vehicle frame 1, a second vehicle frame 2 and an adjustment mechanism, and the adjustment mechanism is located on the first vehicle frame 1 Between the first vehicle frame 1 and the second vehicle frame 2, the relative positions of the first vehicle frame 1 and the second vehicle frame 2 can be changed under the action of the adjustment mechanism. The adjustment mechanism includes: a first adjustment tube 11 , a second adjustment tube 21 , a positioning tube 3 and a screw assembly.

The first regulating pipe 11 and the second regulating pipe 21 are hollow cylinders, the positioning pipe 3 is also a hollow cylinder, one end of the first regulating pipe 11 is fixedly connected with the first vehicle frame 1, so One end of the second adjusting pipe 21 is fixedly connected with the second vehicle frame 2, the screw assembly is connected with the positioning pipe 3 and is located inside the second adjusting pipe 21, and the first adjusting pipe 11 The other end of the other end is sleeved on the second adjusting pipe 21 , the positioning pipe 3 is fixedly connected with the first frame 1 , and the screw assembly is fixedly connected with the second frame 2 .

The screw assembly includes a screw 4 , a screw sleeve 5 and a hex head 6 . One end of the threaded rod 4 is fixedly connected to one end of the hexagonal head 6, and a first bushing 7 is arranged inside the right end of the second regulating pipe 21, and the first bushing 7 is fixedly bonded to the said first bushing 7 by glue. On the second adjusting pipe 21, the first bushing 7 is provided with a through hole for passing through the hexagonal head 6, and the hexagonal head 6 is sleeved with a first retaining spring 101 before passing through the through hole. After passing through the through hole, the second clamp spring 102 is sheathed, and the fixed connection between the hexagonal head 6 and the first bushing 7 is completed. One end of the screw sleeve 5 is inserted into the positioning tube 3 and fixedly connected with it to form a whole. The fixed connection method can be bonding or rivet connection. After the threaded mandrel 4 is screwed into the threaded mandrel sleeve 5, the connection of the threaded mandrel assembly with the positioning tube 3 is completed.

The wheelchair seat width adjustment device provided by the present invention also includes a guide limit assembly, the guide limit assembly is arranged on the adjustment mechanism, the guide limit assembly includes a second bush 8 and a third bush 9, the The minimum outer diameter of the second bush 8 is equal to the maximum outer diameter of the third bush 9 , and when assembled, the right end of the third bush 9 can just be inserted into the second bush 8 . One end of the second bushing 8 is inserted into the first regulating pipe 11 and fixedly connected with it, and one end of the third bushing 9 is inserted into the second regulating pipe 21 and fixedly connected with it. The second bushing 8 is inserted into the second regulating pipe 21, and then the third bushing 9 is inserted into one end of the second regulating pipe 21 and fixedly connected with it, and then the first regulating pipe 11 is set After entering the second regulating pipe 21, it is fixedly connected with the second bushing 8. The relative position of the first vehicle frame 1 and the second vehicle frame 2 can be prevented from being too large to cause the first adjusting tube 11 to be detached from the second adjusting tube 21 through the guiding and limiting assembly.

The assembly method of the wheelchair seat width adjustment device provided by the present invention is as follows, but not limited to the following assembly sequence, as long as it can be assembled. When assembling, glue the first bushing to the inside of the right end of the second adjusting tube 21; insert the screw sleeve 5 into the positioning tube 3 and stick it tightly with glue; put the screw 4 After one end of the hexagonal head 6 is fixedly connected with the rivet, the other end of the screw rod 4 is screwed into the screw sleeve 5; the second bushing 8 is inserted into the second adjusting tube 21 Then, insert the third bushing 9 into one end of the second adjusting tube 21 and stick it tightly with glue; set the first snap ring 101 on the hexagonal head 6; insert the first adjusting tube 11 After inserting the second adjusting tube 21, insert the second bushing 8 into the first adjusting tube 11 and stick it tightly with glue; connect the positioning tube 3 and the screw rod 4 from the The left side of the first adjusting pipe 11 is inserted until the hexagonal head 6 passes through the through hole of the first bushing 7, and then a second snap ring is sleeved on the exposed part of the hexagonal head 6, and the The left end of the positioning tube 3 and the first vehicle frame 1 are fixed with glue or screws, and the assembly is completed. When adjusting the relative distance between the first frame 1 and the second frame 2, it is only necessary to use a tool to rotate the hex head 6 to realize the adjustment of the relative distance.

Applying the device of the present invention to a wheelchair can realize stepless adjustment of the seat width of the wheelchair. When adjusting, use a ring wrench to rotate the hexagonal head 6 clockwise, and the hexagonal head 6 drives the screw rod 4 to rotate. Because the first retaining spring 101 and The second circlip 102 clamps the first bushing 7 on the hexagonal head 6, and the first bushing 7 is fixedly connected to the second vehicle frame 2, and when the screw rod 4 rotates, it will drive the vehicle frame 2 to run inward. , the seat width of the wheelchair can be narrowed according to the actual situation of the user. Similarly, if it needs to be widened, use a ring wrench to rotate the hexagonal head 6 counterclockwise, and the screw rod 4 will drive the frame 2 to move outward, and the seat width of the wheelchair will become wider. Width. Compared with the prior art, the wheelchair seat width adjusting device of the present invention has a simple structure, and can perform stepless micro-adjustment of the seat width according to different practical needs of users, with high adjustment accuracy and a large adjustment range.

The above descriptions are only preferred embodiments of the present invention, and are only illustrative rather than restrictive to the present invention. Those skilled in the art understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, but all will fall within the protection scope of the present invention.

Claims (8)

1. A wheelchair seat width adjustment device, characterized in that it comprises a first vehicle frame, a second vehicle frame and an adjustment mechanism, the adjustment mechanism is located between the first vehicle frame and the second vehicle frame, the The adjustment mechanism can adjust the distance between the first frame and the second frame. 2. The wheelchair seat width adjustment device according to claim 1, wherein the adjustment mechanism comprises a first adjustment tube, a second adjustment tube, a positioning tube and a screw assembly, and one end of the first adjustment tube is connected to The first frame is fixedly connected, one end of the second adjusting tube is fixedly connected to the second frame, the screw assembly is connected to the positioning tube and is located inside the second adjusting tube, so The other end of the first adjusting tube is sheathed on the second adjusting tube, the positioning tube is fixedly connected to the first frame, and the screw assembly is fixedly connected to the second frame. 3. The wheelchair seat width adjusting device according to claim 2, wherein the screw assembly comprises a screw, a screw sleeve and a hexagonal head, and one end of the screw rod is fixedly connected to one end of the hexagonal head , one end of the screw sleeve is inserted into the positioning tube and fixedly connected with it to form a whole, and the screw is screwed into the screw sleeve. 4. The wheelchair seat width adjustment device according to claim 3, characterized in that, a first bushing is fixed inside the right end of the second adjustment tube, and the first bushing is provided with a hole for passing through the hexagon. head through hole. 5. The wheelchair seat width adjusting device as claimed in claim 4, wherein the hexagonal head is sheathed with a first circlip first, and then a second circlip is sheathed after passing through the through hole, and the hexagonal head The head is fixedly connected to the first bushing. 6. The wheelchair seat width adjustment device according to any one of claims 2-5, further comprising a guide and limit assembly, the guide and limit assembly is arranged on the adjustment mechanism. 7. The seat width adjustment device of a wheelchair according to claim 6, wherein the guide limit assembly comprises a second bush and a third bush, and the minimum outer diameter of the second bush is the same as that of the first bush. The maximum outer diameters of the three bushings are equal. 8. The wheelchair seat width adjustment device according to claim 7, wherein the second bushing is inserted into the second adjusting tube first, and then the third bushing is fixed to the second adjusting tube connected, and then fixedly connect the second bushing to the first regulating pipe.