CN212235014U

CN212235014U - Foldable wheelchair

Info

Publication number: CN212235014U
Application number: CN202020549001.2U
Authority: CN
Inventors: 陈向阳
Original assignee: Zhejiang Aceme Electric Co ltd
Current assignee: Zhejiang Aceme Electric Co ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-12-29
Anticipated expiration: 2030-04-14

Abstract

The utility model provides a foldable wheelchair, through setting up the locking mechanical system including locking piece, locking chamber and unlocking device, and make the locking chamber extend along controlling the direction, make the locking chamber including setting up the first locking chamber of tip under the back support and setting up the second locking chamber at rear wheel support upper end, make the locking piece remove the ground and set up in the locking intracavity about, realized when the locking piece is located first locking intracavity and second locking intracavity simultaneously, locking mechanical system locks, when the locking piece is only located first locking intracavity or second locking intracavity, the unlocking of locking mechanical system, this locking mechanical system simple structure is compact, remove about the locking intracavity through unlocking device drive locking piece, high in use, because the cooperation in locking piece and locking chamber is located inside the member of foldable wheelchair, do not expose outside, make locking mechanical system security high, the safety, the degree of safety, the locking mechanism is high, the locking mechanism is provided with the locking device is provided with the right-, Has long service life, and makes the foldable wheelchair provided by the utility model beautiful in appearance and strong in high-grade sense.

Description

Foldable wheelchair

Technical Field

The utility model relates to the field of medical equipment, concretely relates to collapsible wheelchair.

Background

In the process of treating and recovering patients, particularly for patients who cannot walk independently, the wheelchair mode is usually adopted to replace walking, so that the patients can be treated and recovered well, and the daily life of the patients is facilitated.

The chair that current wheelchair adopted fixed knot to construct erects to make in the pivot of a pair of gyro wheel more, the diameter of gyro wheel is great, make the upper portion of gyro wheel can be convenient enough by user's hand, the user rotates the gyro wheel through the hand and makes the wheelchair advance or retreat, this kind of wheelchair can't be folded, need occupy great space, also there are some folding wheelchairs in the market, but these wheelchairs often have a plurality of locking mechanical system that are used for locking different parts, during the unblock, just can fold the wheelchair after needing to unblock in a plurality of positions, it is very inconvenient to use, and locking mechanical system's cooperation structure is mostly exposed outside, not only there is the potential safety hazard, also make locking mechanical system fragile, short service life, still seriously influence the outward appearance of wheelchair, make the senior sense of wheelchair poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming of prior art, provide a collapsible wheelchair, the simple compactness of locking mechanical system, convenient to use of this wheelchair, inside locking mechanical system's cooperation structure was located the member, the security was high, not fragile, long service life, outward appearance pleasing to the eye, senior sense is strong.

In order to achieve the above object, the utility model provides a technical scheme is, collapsible wheelchair, include:

a backrest support;

the upper end part of the rear wheel bracket is rotationally connected with the lower end part of the backrest bracket, and the bottom of the rear wheel bracket is provided with a rear wheel;

a seat mechanism rotatably provided on the backrest support, the seat mechanism having an extension rod extending forward and downward;

the front wheel bracket is provided with a front wheel at the bottom, the front end part of the front wheel bracket is rotationally connected with the front end part of the extension rod, and the rear end part of the front wheel bracket is rotationally connected with the rear wheel bracket;

a locking mechanism for locking the relative positions of the rear wheel bracket and the back bracket;

locking mechanical system includes the locking piece and is used for holding the locking chamber of locking piece, the locking chamber extends along left right direction, the locking chamber is including setting up the first locking chamber and the second locking chamber that sets up at rear wheel support upper end under the back support tip, the locking piece can remove the ground and set up in the locking chamber the locking piece is located simultaneously first locking intracavity with during the second locking intracavity, locking mechanical system locks the locking piece only is located first locking intracavity or during the second locking intracavity, locking mechanical system unblock, locking mechanical system still is including being used for the drive the locking piece is in remove unlocking device about the locking intracavity.

The blind hole has been seted up to the lower tip of back support, be provided with first locking groove on the inner wall of blind hole, first locking chamber includes cavity in the first locking groove, the upper end of rear wheel support is provided with the through-hole, be provided with the second locking groove on the inner wall of through-hole, the second locking chamber includes cavity in the second locking groove.

Further preferably, the outer wall of the locking block is provided with locking teeth, when the locking teeth are simultaneously inserted into the first locking groove and the second locking groove, the locking mechanism is locked, and when the locking teeth are only inserted into the first locking groove or the second locking groove, the locking mechanism is unlocked.

Further preferably, an annular flange is arranged in the through hole, one side face of the annular flange is attached to the end portion, away from the first locking groove, of the second locking groove, and the annular flange is used for preventing the locking block from being separated from the second locking groove when the locking block moves in the second locking groove.

Further preferably, the axis of the blind hole coincides with the axis of the through hole, and the rotating shaft of the rear wheel bracket relative to the backrest bracket extends into the through hole from the opening of the blind hole or extends into the blind hole from the opening of the through hole.

Further preferably, the locking mechanism further comprises a spring, one end of the spring abuts against the bottom wall of the blind hole, the other end of the spring abuts against the side wall, close to the blind hole, of the locking block, and the spring has a tendency of driving the locking block to move in a direction away from the blind hole.

Further preferably, the unlocking device comprises a rotatable unlocking handle, the end of the unlocking handle is provided with a bevel which is contacted with one end face of the locking block, and when the unlocking handle rotates, the contact point of the bevel and the locking block moves leftwards and/or rightwards, so that the locking block is pushed leftwards and/or rightwards in the locking cavity.

Further preferably, the unlocking handle is rotatably arranged on the rear wheel bracket, the end of the unlocking handle extends into the through hole to form a rotating shaft for rotating the unlocking handle relative to the rear wheel bracket, and the rotating shaft axis of the unlocking handle coincides with the shaft axis of the through hole.

Further preferably, the foldable wheelchair further comprises a back board, a pedal and a grab bar, wherein the back board is rotatably arranged on the back support, the pedal is rotatably arranged on the pedal mounting pipe, the end part of the pedal mounting pipe is fixedly arranged on the front wheel support, the grab bar is rotatably arranged on the back support, and the grab bar is positioned above the seat mechanism.

Further preferably, the foldable wheelchair further comprises an in-wheel motor, a battery box and a controller, the in-wheel motor is arranged on the rear wheel and used for driving the rear wheel to rotate, a rotating axis of an output shaft of the in-wheel motor coincides with a rotating axis of the rear wheel, the battery box is detachably arranged on the rear wheel support, the controller is used for controlling the rotating speed and the rotating direction of the in-wheel motor, and the controller is arranged at the end part of the grab bar.

Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage:

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a schematic cross-sectional view of the locking mechanism of the present invention.

Fig. 3 is an assembly diagram of the locking mechanism of the present invention.

Wherein: 10. a collapsible wheelchair; 11. a front wheel; 12. a rear wheel; 100. a backrest support; 101. blind holes; 1011. a first locking groove; 200. a rear wheel support; 201. a through hole; 2011. a second locking slot; 2012. an annular flange; 300. a seat mechanism; 301. an extension rod; 302. a seating surface; 400. a front wheel bracket; 500. a locking mechanism; 501. a locking block; 5011. a locking tooth; 502. a locking cavity; 5021. a first locking cavity; 5022. a second locking cavity; 503. unlocking the carrying handle; 5031. an end portion; 5032. a bevel; 504. a spring; 505. a top block; 601. a back board; 602. a foot pedal; 6021. a foot board mounting rod; 603. a grab rail; 701. a hub motor; 702. a battery box; 703. a controller; 800. and a through bolt.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more easily understand the advantages and features of the present invention, and to make clear and definite definitions of the protection scope of the present invention.

The fore-and-aft direction, left-and-right direction and up-and-down direction described by the utility model are based on the fore-and-aft direction, left-and-right direction and up-and-down direction observed when the user takes the wheelchair provided by the utility model.

As shown in fig. 1-3, the present invention provides a collapsible wheelchair 10 comprising: the seat back comprises a backrest support 100, a rear wheel support 200, a seat mechanism 300, a front wheel support 400, a locking mechanism 500, a front wheel 11 and a rear wheel 12, wherein the upper end part of the rear wheel support 200 is rotatably connected with the lower end part of the backrest support 100, the rear wheel 12 is rotatably arranged at the bottom part of the rear wheel support 200, the seat mechanism 300 is rotatably arranged on the backrest support 100, the seat mechanism 300 is provided with a seat surface 302 for supporting the hip of an occupant and an extension rod 301 extending forwards and downwards, the front wheel 11 is rotatably arranged at the bottom part of the front wheel support 400, the front end part of the front wheel support 400 is rotatably connected with the front end part of the extension rod 301, the rear end part of the front wheel support 400 is rotatably connected with the rear wheel support 200, when the rear wheel support 200 rotates relative to the backrest support 100 in the direction close to the front wheel support 400, the seat mechanism 300 and the backrest support 100 can be driven to be close to the front wheel support 400, the collapsible wheelchair 10 is transformed into the collapsed state.

The locking mechanism 500 is used for locking the relative positions of the rear wheel bracket 200 and the backrest bracket 100, the locking mechanism 500 comprises a locking block 501 and a locking cavity 502 for accommodating the locking block 501, the locking cavity 502 extends along the left-right direction, the locking cavity 502 comprises a first locking cavity 5021 arranged at the lower end part of the backrest bracket 100 and a second locking cavity 5022 arranged at the upper end part of the rear wheel bracket 200, the locking block 501 is arranged in the locking cavity 502 in a left-right moving manner, when the locking block 501 is simultaneously positioned in the first locking cavity 5021 and the second locking cavity 5022, the locking mechanism 500 is locked, when the locking block 501 is only positioned in the first locking cavity 5021 or the second locking cavity 5022, the locking mechanism 500 is unlocked, specifically, the lower end part of the backrest bracket 100 is provided with a blind hole 101, the inner wall of the blind hole 101 is provided with a first locking groove 1011, the first locking groove 1011 has four blind holes and is uniformly distributed on the inner wall of the blind hole 101, the cavity in the first locking groove 1011 and the cavity in the first locking groove 101 jointly form the first locking cavity 1, the upper end of the rear wheel bracket 200 is provided with a through hole 201, a second locking groove 2011 is arranged on the inner wall of the through hole 201, the number of the second locking grooves 2011 is four, the second locking grooves 2011 are uniformly distributed on the inner wall of the through hole 201, a cavity in the second locking groove 2011 and a cavity in the through hole 201 jointly form a second locking cavity 5022, the rear wheel bracket 200 is positioned on one side of the backrest bracket 100, the through hole 201 is aligned with the blind hole 101, the locking cavity 502 is positioned inside two rod pieces of the backrest bracket 100 and the rear wheel bracket 200, the locking block 501 is cylindrical, four locking teeth 5011 are uniformly distributed on the outer circumferential surface of the locking block 501, the locking teeth 5011 are matched with the first locking groove 1011 and the second locking groove 2011, when the locking teeth 5011 are simultaneously inserted into the first locking groove 1011 and the second locking groove 2011, the locking mechanism 500 is locked, and when the locking teeth 5011 are only inserted into the first locking groove 1011 or the second locking groove 2011.

The locking mechanism 500 further comprises unlocking means for driving the locking block 501 to move to the left and right within the locking cavity 502, the unlocking device comprises a rotatable unlocking handle 503, when the unlocking handle 503 rotates, the unlocking handle 503 can push the locking block 501 to move leftwards and/or rightwards, specifically, the unlocking handle 503 and the backrest bracket 100 are respectively arranged at two sides of the rear wheel bracket 200, the unlocking handle 503 is rotatably arranged on the rear wheel bracket 200, the end portion 5031 of the unlocking handle 503 extends into the through hole 201 to form a rotating shaft of the unlocking handle 503 relative to the rear wheel bracket 200, the rotating shaft axis of the unlocking handle 503 is coincident with the shaft axis of the through hole 201, the end portion 5031 of the unlocking handle 503 is provided with an inclined surface 5032, the ramp 5032 contacts an end of the lock block 501 and, when the unlocking handle 503 is rotated, the contact point of the ramp 5032 with the lock block 501 moves left or right, thereby pushing the lock block 501 to move left or right within the lock cavity 502.

In this embodiment, in order to adapt to the rear wheel brackets 200 with different sizes, especially when the axial length of the through hole 201 changes greatly, the locking mechanism 500 of the present invention can also be applied, a top block 505 is further disposed between the inclined surface 5032 and the locking block 501, the inclined surface 5032 contacts with the locking block 501 through the top block 505, and the universality of the locking mechanism 500 is enhanced by replacing the top block 505 with different lengths.

In order to prevent the locking teeth 5011 of the locking block 501 from being disengaged from the second locking groove 2011 when they move in the second locking groove 2011, an annular flange 2012 is further provided in the through hole 201, and one side surface of the annular flange 2012 is attached to the end of the second locking groove 2011 away from the first locking groove 1011.

The axial lead of the blind hole 101 coincides with the axial lead of the through hole 201, and the opening of the blind hole 101 extends into the through hole 201 to form a rotating shaft for rotating the rear wheel bracket 200 relative to the backrest bracket 100.

The locking mechanism 500 further comprises a spring 504, one end of the spring 504 abuts against the bottom wall of the blind hole 101, the other end of the spring 504 abuts against the side wall of the locking block 501 close to the blind hole 101, the spring 504 has a tendency to drive the locking block 501 to move away from the blind hole 101, and the spring 504 is arranged to facilitate the resetting of the locking mechanism 500.

For improving riding comfort, the utility model provides a foldable wheelchair 10 still includes back board 601, running-board 602 and bar 603, wherein, back board 601 rotationally sets up on back support 100, and running-board 602 rotationally sets up on running-board installation pipe 6021, and the tip of running-board installation pipe 6021 sets firmly on front wheel support 400, and bar 603 rotationally sets up on back support 100, and bar 603 is located the top of seat mechanism 300, and the upper surface of bar 603 is on a parallel with seat surface 302 of seat mechanism 300.

For convenient removal, the utility model provides a collapsible wheelchair 10 still includes in-wheel motor 701, battery box 702 and controller 703, wherein, in-wheel motor 701 sets up on rear wheel 12, in-wheel motor 701 is used for driving rear wheel 12 and rotates, the axis of rotation of in-wheel motor 701's output shaft coincides mutually with the axis of rotation of rear wheel 12, battery box 702 detachably sets up on rear wheel support 200, battery box 702 is located the below of seat face 302 of seat mechanism 300, reduce the focus of collapsible wheelchair 10, improve its stability, and, battery box 702 can be convenient dismantle, controller 703 is used for controlling in-wheel motor 701's rotational speed and turns to, controller 703 sets up the tip at bar 603, the person's operation of being convenient for takes.

The utility model provides a foldable wheelchair 10 is still including being used for preventing that rear wheel support 200 from keeping away from the through bolt 800 of back support 100 along left right direction, and the one end of through bolt 800 is supported tightly on rear wheel support 200, and the other end passes through the nut to be fixed on back support 100, and the axial lead of through bolt 800 coincides mutually with rear wheel support 200 for the axis of rotation of back support 100.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, so as not to limit the protection scope of the present invention, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. A collapsible wheelchair comprising:

a backrest support;

the method is characterized in that:

2. The foldable wheelchair as claimed in claim 1, wherein the backrest support has a blind hole at a lower end thereof, a first locking groove is formed in an inner wall of the blind hole, the first locking cavity comprises a cavity in the first locking groove, a through hole is formed at an upper end thereof, a second locking groove is formed in an inner wall of the through hole, and the second locking cavity comprises a cavity in the second locking groove.

3. The foldable wheelchair as claimed in claim 2, wherein the locking block is provided on an outer wall thereof with a locking tooth, the locking mechanism is locked when the locking tooth is simultaneously inserted into the first locking groove and the second locking groove, and the locking mechanism is unlocked when the locking tooth is only inserted into the first locking groove or the second locking groove.

4. The foldable wheelchair of claim 2, wherein an annular flange is provided in the through hole, one side of the annular flange being fitted to an end of the second locking groove remote from the first locking groove, the annular flange being adapted to prevent the locking block from disengaging the second locking groove when moving within the second locking groove.

5. The foldable wheelchair as claimed in claim 2, wherein the axis of the blind hole coincides with the axis of the through hole, and the rotation axis of the rear wheel support relative to the backrest support is formed by the opening of the blind hole extending into the through hole or the opening of the through hole extending into the blind hole.

6. The foldable wheelchair as recited in claim 2, wherein the locking mechanism further comprises a spring, one end of the spring abuts against a bottom wall of the blind hole, the other end of the spring abuts against a side wall of the locking block adjacent to the blind hole, and the spring has a tendency to urge the locking block to move away from the blind hole.

7. The foldable wheelchair as claimed in claim 2, wherein the unlocking means comprises a rotatable unlocking handle, the end of the unlocking handle having a slope which contacts an end surface of the locking block, and the contact point of the slope with the locking block moves leftward and/or rightward when the unlocking handle rotates, pushing the locking block to move leftward and/or rightward in the locking cavity.

8. The foldable wheelchair as claimed in claim 7, wherein the unlocking handle is rotatably provided on the rear wheel frame, an end of the unlocking handle protrudes into the through hole to form a rotation shaft of the unlocking handle relative to the rear wheel frame, and a rotation axis of the unlocking handle coincides with an axis of the through hole.

9. The foldable wheelchair as claimed in any one of claims 1 to 8, further comprising a back plate rotatably provided on the back support, a footboard rotatably provided on a footboard mounting pipe having an end fixedly provided on the front wheel support, and a grab bar rotatably provided on the back support, the grab bar being located above the seat mechanism.

10. The foldable wheelchair as recited in claim 9, wherein: but folding wheelchair still includes in-wheel motor, battery box and controller, in-wheel motor sets up on the rear wheel, in-wheel motor is used for the drive the rear wheel rotates, the rotation axis of in-wheel motor output shaft with the rotation axis of rear wheel coincides mutually, battery box detachably sets up on the rear wheel support, the controller is used for controlling in-wheel motor's rotational speed and turning to, the controller sets up the tip of bar.