Control handrail capable of being horizontally adjusted

Abstract

The utility model belongs to the field of wheelchairs, and particularly relates to a horizontally-adjustable control armrest which comprises a wheelchair body. An armrest bracket is mounted in the middle of the wheelchair body; the middle part of the armrest bracket is rotationally connected with a gear; a locking assembly is arranged in the middle of the gear; the middle part of the gear is fixedly connected with a connecting rod; the middle part of the connecting rod is fixedly connected with a circular plate; a rack is slidably connected to the middle of the armrest support. The rack is meshed with the gear; the bottom of the rack is fixedly connected with a connecting frame; a remote control rod is mounted in the middle of the connecting frame; the circular plate is rotated to enable the rack to move along the handrail support under the meshing transmission effect of the gear, the device can flexibly adjust the position of the remote control lever, the remote control lever can adapt to users of different heights, the time for adjusting the position of the remote control lever is shortened, and the adaptability and convenience of the device for the users of different heights to control the remote control lever are improved.

Description

Technical Field

[0001] The utility model relates to the field of wheelchairs, in particular to a horizontally adjustable control armrest. Background Art

[0002] A wheelchair is a seat with wheels, mainly used for people with functional disabilities or other walking difficulties to get around; with a wheelchair, these people can carry out indoor and outdoor activities more independently, thereby improving their quality of life.

[0003] A wheelchair mainly consists of the following components: a seat part, a wheel system, armrests, footrests, a braking system, a remote control lever, etc.; the remote control lever is usually installed near the armrests of the wheelchair, and the user can control the movement of the wheelchair by operating the remote control lever.

[0004] The existing remote control lever is usually fixed to the armrest with a connecting frame by bolts. During use and observation, it is found that when users of different heights operate the remote control lever, the position of the remote control lever needs to be adjusted, and the bolts need to be removed and then reinstalled, which will take a lot of work time.

[0005] Therefore, in order to solve the above problems, a horizontally adjustable control armrest is proposed. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0007] The technical solution adopted by the present invention to solve its technical problems is: the horizontally adjustable control armrest described in the present invention comprises a wheelchair body; an armrest bracket is installed in the middle of the wheelchair body; the middle part of the armrest bracket is rotatably connected to a gear; a locking assembly is provided in the middle of the gear; the middle part of the gear is fixedly connected to a connecting rod; the middle part of the connecting rod is fixedly connected to a circular plate; the middle part of the armrest bracket is slidably connected to a rack; the rack and the gear are in a meshing relationship; the bottom of the rack is fixedly connected to a connecting frame; a remote control rod is installed in the middle of the connecting frame; the rotating circular plate causes the rack to move along the armrest bracket under the meshing transmission action of the gear, thereby realizing flexible adjustment of the position of the remote control rod by the device, so that the remote control rod can adapt to users of different heights, shortening the time for adjusting the position of the remote control rod, and improving the adaptability and convenience of the device for users of different heights to operate the remote control rod.

[0008] Preferably, the locking assembly comprises a slide rod; the slide rod and the gear are penetratingly arranged and are in sliding connection; the slide rod and the circular plate are penetratingly arranged and are in sliding connection; the middle part of the slide rod is fixedly connected with a spring; the spring and the circular plate are in fixed connection; the middle part of the handrail support is provided with a plurality of circular holes; the slide rod and the circular holes are correspondingly arranged and are in sliding fit; pulling the slide rod out of or into the circular hole can make the circular plate and the gear in active or locked state, improve the flexibility of the device in controlling the circular plate, and reduce the shaking of the circular plate when it stops rotating.

[0009] Preferably, the end part of the slide rod is rotatably connected with a circular ring; the middle part of the circular plate is fixedly connected with a fixed plate; the middle part of the fixed plate is provided with a clamping groove; the circular ring and the clamping groove are correspondingly arranged; the clamping groove is in arc structure; the middle part of the clamping groove is rotatably connected with a clamping plate; the clamping plate and the clamping groove are connected through a torsional spring; the slide rod is fixed under the frictional action of the circular ring and the clamping plate after being separated from the circular hole, the energy required for fixing the slide rod is reduced, and the convenience of a user in adjusting the rotation of the circular plate is improved.

[0010] Preferably, the inner side wall of the clamping groove is fixedly connected with a plurality of friction pads; the friction pads are arranged in an array; the circular ring also comes into contact with the friction pads after entering the inside of the clamping groove, because the surface friction coefficient of the friction pads is larger, and the friction pads also fill the gap between the circular ring and the clamping groove, the friction between the circular ring and the clamping groove is increased, the stability of the device in fixing the circular ring is improved, and the shaking of the circular ring in the clamping groove is reduced.

[0011] Preferably, the middle part of the handrail support is fixedly connected with an oil bag; the middle part of the oil bag is rotatably connected with a plurality of rolling balls; the rolling balls are located between the oil bag and the gear; the inside of the oil bag is injected with lubricating oil; the gear comes into contact with the rolling balls and makes the rolling balls rotate when rotating; the rolling balls pick up the lubricating oil in the oil bag and apply the lubricating oil to the surface of the gear when rotating, the smoothness of the surface of the gear is improved, and the abrasion caused by the meshing of the gear and the rack is reduced.

[0012] Preferably, the middle part of the connecting rod is fixedly connected with a cantilever plate; the cantilever plate and the oil bag are correspondingly arranged; the top of the oil bag is communicated with an oil pipe; the cantilever plate rotates together with the circular plate when the circular plate is rotated by a user, the oil bag is knocked by the cantilever plate when the cantilever plate rotates, the lubricating oil in the oil bag flows out from the oil pipe and the rolling balls under the knocking action, and the lubricating oil reaches the surfaces of the gear and the rack, the lubricating effect of the device on the gear and the rack is enhanced.

[0013] Preferably, the middle part of the circular plate is provided with a plurality of grooves; the grooves are arranged in a circumferential array; the contact area between a user and the circular plate is larger when the user rotates the circular plate because the surface of the circular plate is provided with the grooves, the friction that the user receives when rotating the circular plate is increased, and the convenience of the rotation of the circular plate is improved.

[0014] The utility model discloses the beneficial effect lies in:

[0015] 1. The utility model discloses a horizontally adjustable control armrest. The circular plate is rotated to allow the rack to move along the armrest bracket under the meshing transmission action of the gears, thereby realizing the flexible adjustment of the position of the remote control lever by the device, so that the remote control lever can adapt to users of different heights, shortening the time for adjusting the position of the remote control lever, and improving the adaptability and convenience of the device for users of different heights to operate the remote control lever.

[0016] 2. The utility model describes a horizontally adjustable control armrest. By pulling the sliding rod out of or into the circular hole, the circular plate and the gear can be put into an active or locked state, thereby improving the flexibility of the device in controlling the circular plate and reducing the shaking that occurs when the circular plate stops rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the main body of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the handrail bracket in the utility model;

[0020] Figure 3 This is a schematic structural diagram of the connecting frame in the present utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the circular plate in the utility model;

[0022] Figure 5 It is a structural schematic diagram of the fixing plate in the present utility model.

[0023] In the figure: 1. Wheelchair body; 12. Armrest bracket; 13. Remote control lever; 14. Connecting frame; 15. Gear; 16. Rack; 17. Connecting rod; 18. Circular plate; 19. Locking assembly; 2. Sliding rod; 22. Spring; 23. Circular hole; 3. Circular ring; 32. Fixing plate; 33. Clamping plate; 34. Clamping slot; 4. Friction pad; 5. Oil sac; 52. Ball bearing; 6. Pick plate; 62. Oil pipe; 7. Groove. DETAILED DESCRIPTION

[0024] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] Specific examples are given below.

[0026] See also Figures 1 to 5 As shown, the horizontally adjustable control armrest described in the embodiment of the present utility model includes a wheelchair body 1; an armrest bracket 12 is installed in the middle of the wheelchair body 1; the middle part of the armrest bracket 12 is rotatably connected to a gear 15; a locking assembly 19 is provided in the middle of the gear 15; the middle part of the gear 15 is fixedly connected to a connecting rod 17; the middle part of the connecting rod 17 is fixedly connected to a circular plate 18; the middle part of the armrest bracket 12 is slidably connected to a rack 16; the rack 16 and the gear 15 are in a meshing relationship; the bottom of the rack 16 is fixedly connected to a connecting frame 14; a remote control rod 13 is installed in the middle part of the connecting frame 14; a user sitting on the wheelchair body 1 can control the components of the wheelchair body 1 through the remote control rod 13, so that the user is in a comfortable state when using the wheelchair body 1. When users of different heights use the wheelchair body 1, the circular plate 18 can be rotated to make the connecting rod 18 The connecting rod 17 rotates together with the gear 15, and when the gear 15 rotates, it meshes with the rack 16. The rack 16 slides along the armrest bracket 12 under the transmission action of the gear 15, and when the rack 16 moves, it moves with the connecting frame 14 and the remote control rod 13, so that the distance between the remote control rod 13 and the user changes. After adjusting the remote control rod 13 to a suitable position according to actual needs, the circular plate 18 can be fixed by the locking assembly 19, and the device can adjust the position of the remote control rod 13 at this time; rotating the circular plate 18 causes the rack 16 to move along the armrest bracket 12 under the meshing transmission action of the gear 15, so that the device can flexibly adjust the position of the remote control rod 13, so that the remote control rod 13 can adapt to users of different heights, shorten the time for adjusting the position of the remote control rod 13, and improve the adaptability and convenience of the device for users of different heights to operate the remote control rod 13.

[0027] See also Figure 3 and Figure 4As shown, the locking assembly 19 includes a slide bar 2; the slide bar 2 and the gear 15 are set through and are slidably connected; the slide bar 2 and the circular plate 18 are also set through and are slidably connected; a spring 22 is fixed to the middle of the slide bar 2; the spring 22 and the circular plate 18 are both fixedly connected; a plurality of circular holes 23 are opened in the middle of the armrest bracket 12; the slide bar 2 and the circular holes 23 are correspondingly set and slidably matched; in the normal state, the slide bar 2 will pass through the circular hole 23 and fix the circular plate 18 and the gear 15. When the user rotates the circular plate 18 to adjust the remote control lever 13, The slide bar 2 can be pulled to disengage from the circular hole 23. At this time, the spring 22 will also be in a compressed state. Then, the circular plate 18 can be rotated to move the remote control rod 13 to an appropriate distance. After the adjustment is completed, the slide bar 2 can be loosened so that the slide bar 2 is reset under the elastic force of the spring 22 and enters the corresponding circular hole 23, thereby realizing the rapid fixation of the circular plate 18 and the gear 15 by the device; pulling the slide bar 2 out of or into the circular hole 23 can make the circular plate 18 and the gear 15 active or locked, thereby improving the flexibility of the device in controlling the circular plate 18 and reducing the shaking that occurs when the circular plate 18 stops rotating.

[0028] See also Figures 3 to 5 As shown, the end of the slide rod 2 is rotatably connected to the ring 3; the middle of the circular plate 18 is fixedly connected to a fixing plate 32; the middle of the fixing plate 32 is provided with a slot 34; the ring 3 and the slot 34 are correspondingly arranged; the slot 34 is an arc-shaped structure; the middle of the slot 34 is rotatably connected to a clamping plate 33; the clamping plate 33 and the slot 34 are connected by a torsion spring; in a normal state, the clamping plate 33 will close the slot 34. After the user pulls the slide rod 2 out of the circular hole 23, the ring 3 can be rotated to make the ring 3 enter the slot 34. When the ring 3 enters the slot 34, it will come into contact with the clamping plate 33 The locking plate 33 is pressed against the locking nut 34 to release it from the locking nut 34, and the locking nut 33 is pressed against the locking nut 34 to release it from the locking nut 34.

[0029] See also Figure 5As shown, a plurality of friction pads 4 are fixed to the inner wall of the slot 34; the friction pads 4 are arranged in an array; after the ring 3 enters the slot 34, it will also come into contact with the friction pads 4, because the surface friction coefficient of the friction pads 4 is larger, and at the same time, the friction pads 4 will also fill the gap between the ring 3 and the slot 34, thereby increasing the friction between the ring 3 and the slot 34, improving the stability of the device in fixing the ring 3, and reducing the shaking of the ring 3 inside the slot 34.

[0030] See also Figure 4 As shown, an oil bag 5 is fixed to the middle part of the armrest bracket 12; a plurality of balls 52 are rotatably connected to the middle part of the oil bag 5; the balls 52 are located between the oil bag 5 and the gear 15; lubricating oil is injected into the oil bag 5, and when the gear 15 rotates, it contacts the balls 52 and causes it to rotate. When the balls 52 rotate, they absorb the lubricating oil inside the oil bag 5 and apply it to the surface of the gear 15, thereby improving the smoothness of the surface of the gear 15 and reducing the wear caused by the engagement of the gear 15 and the rack 16.

[0031] See also Figure 3 and Figure 4 As shown, a pick plate 6 is fixedly connected to the middle part of the connecting rod 17; the pick plate 6 and the oil bag 5 are correspondingly arranged; the top of the oil bag 5 is connected to the oil pipe 62; when the user rotates the circular plate 18, the circular plate 18 will drive the pick plate 6 to rotate together, and the pick plate 6 will knock on the oil bag 5 when it rotates. The lubricating oil inside the oil bag 5 will flow out from the oil pipe 62 and the ball 52 under the action of knocking, and the lubricating oil will reach the surface of the gear 15 and the rack 16, thereby enhancing the lubrication effect of the device on the gear 15 and the rack 16.

[0032] See also Figure 4 As shown, a plurality of grooves 7 are provided in the middle of the circular plate 18; the grooves 7 are arranged in a circular array; when the user rotates the circular plate 18, because the grooves 7 are provided on the surface of the circular plate 18, the contact area between the user and the circular plate 18 is larger, which increases the friction encountered by the user when rotating the circular plate 18 and improves the convenience of rotating the circular plate 18.

[0033] Working principle: The user sitting on the wheelchair body 1 can control the components of the wheelchair body 1 through the remote control rod 13, so that the user is in a comfortable state when using the wheelchair body 1. When users of different heights use the wheelchair body 1, they can rotate the circular plate 18 to rotate the connecting rod 17 together with the gear 15. When the gear 15 rotates, it will mesh with the rack 16. The rack 16 will slide along the armrest bracket 12 under the transmission action of the gear 15. When the rack 16 moves, it will move with the connecting frame 14 and the remote control rod 13, so that the distance between the remote control rod 13 and the user will change. After adjusting the remote control rod 13 to the appropriate position according to actual needs, the circular plate 18 can be fixed by the locking component 19. At this time, the installation is realized. The adjustment of the position of the remote control rod 13 is carried out by the device; in the normal state, the sliding rod 2 will pass through the circular hole 23 and fix the circular plate 18 and the gear 15. When the user rotates the circular plate 18 to adjust the remote control rod 13, the sliding rod 2 can be pulled to make the sliding rod 2 disengage from the circular hole 23. At this time, the spring 22 will also be in a compressed state. Then the circular plate 18 is rotated to make the remote control rod 13 move to a suitable distance. After the adjustment is completed, the sliding rod 2 can be released so that the sliding rod 2 is reset under the elastic force of the spring 22 and enters the corresponding circular hole 23, thereby realizing the rapid fixation of the circular plate 18 and the gear 15 by the device; in the normal state, the card plate 33 will close the card slot 34. After the user pulls the sliding rod 2 out of the circular hole 23, the ring 3 can be rotated to make the ring 3 enter the inside of the card slot 34. When the ring 3 enters the slot 34, it will come into contact with the card plate 33 and bend it. After the ring 3 enters the slot 34, the card plate 33 will reset under the elastic force of the torsion spring and re-close the slot 34, so that the ring 3 will be fixed in the slot 34 under the limiting action of the card plate 33. At this time, the slide bar 2 will also be fixed under the friction between the ring 3 and the card plate 33. After the rotation of the circular plate 18 is completed, the card plate 33 can be pulled to make the ring 3 disengage from the slot 34. After the ring 3 enters the slot 34, it will also come into contact with the friction pad 4. Because the surface friction coefficient of the friction pad 4 is larger, the friction pad 4 will also fill the gap between the ring 3 and the slot 34, increasing the friction between the ring 3 and the slot 34. Function: Lubricating oil is injected into the oil bag 5. When the gear 15 rotates, it will come into contact with the ball 52 and cause it to rotate. When the ball 52 rotates, it will absorb the lubricating oil inside the oil bag 5 and brush it to the surface of the gear 15, thereby improving the smoothness of the surface of the gear 15. When the user rotates the circular plate 18, the circular plate 18 will drive the pick plate 6 to rotate together. When the pick plate 6 rotates, it will knock on the oil bag 5. The lubricating oil inside the oil bag 5 will flow out from the oil pipe 62 and the ball 52 under the action of knocking, and the lubricating oil will reach the surface of the gear 15 and the rack 16. When the user rotates the circular plate 18, because the surface of the circular plate 18 is provided with a groove 7, the contact area between the user and the circular plate 18 is larger, thereby increasing the friction encountered when the user rotates the circular plate 18.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A horizontally adjustable control armrest, comprising a wheelchair body (1), characterized in that: An armrest bracket (12) is installed in the middle of the wheelchair body (1); a gear (15) is rotatably connected to the middle of the armrest bracket (12); a locking assembly (19) is provided in the middle of the gear (15); a connecting rod (17) is fixed to the middle of the gear (15); a circular plate (18) is fixed to the middle of the connecting rod (17); a rack (16) is slidably connected to the middle of the armrest bracket (12); the rack (16) and the gear (15) are in a meshing relationship; a connecting frame (14) is fixed to the bottom of the rack (16); a remote control lever (13) is installed in the middle of the connecting frame (14).

2. The horizontally adjustable control armrest according to claim 1, characterized in that: The locking assembly (19) includes a slide bar (2); the slide bar (2) and the gear (15) are arranged through and are slidably connected; the slide bar (2) and the circular plate (18) are also arranged through and are slidably connected; a spring (22) is fixedly connected to the middle of the slide bar (2); the spring (22) and the circular plate (18) are both fixedly connected; a plurality of circular holes (23) are opened in the middle of the handrail bracket (12); the slide bar (2) and the circular holes (23) are correspondingly arranged and are slidably matched.

3. The horizontally adjustable control armrest according to claim 2, characterized in that: The end of the slide rod (2) is rotatably connected to a circular ring (3); a fixed plate (32) is fixedly connected to the middle of the circular plate (18); a clamping groove (34) is provided in the middle of the fixed plate (32); the circular ring (3) and the clamping groove (34) are correspondingly arranged; the clamping groove (34) is an arc-shaped structure; the middle of the clamping groove (34) is rotatably connected to a clamping plate (33); the clamping plate (33) and the clamping groove (34) are connected by a torsion spring.

4. The horizontally adjustable control armrest according to claim 3, characterized in that: A plurality of friction pads (4) are fixedly connected to the inner side wall of the clamping slot (34); the friction pads (4) are arranged in an array.

5. The horizontally adjustable control armrest according to claim 4, characterized in that: An oil bag (5) is fixedly connected to the middle of the handrail bracket (12); a plurality of balls (52) are rotatably connected to the middle of the oil bag (5); and the balls (52) are located between the oil bag (5) and the gear (15).

6. The horizontally adjustable control armrest according to claim 5, characterized in that: A lifting plate (6) is fixedly connected to the middle of the connecting rod (17); the lifting plate (6) and the oil bag (5) are correspondingly arranged; and the top of the oil bag (5) is connected to an oil pipe (62).

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