CN111481363A - A wheelchair with posture adjustment armrest - Google Patents

Abstract

The invention provides a posture adjustment armrest for a wheelchair, which includes a base connected to the wheelchair, a handle, and a vertical pole connecting the base and the handle. The end of the vertical pole is connected with a rotary switch, and the rod body of the vertical pole is connected to the base along the It can freely fit in the circumferential direction. The bottom of the pole is provided with a locking mechanism that fixes the pole in the circumferential direction. The rotation switch can switch the pole between free rotation and fixed matching with the locking mechanism at the current rotation position. . The advantage of the posture-adjusting armrest for a wheelchair provided by the present invention is that the user can control the rotating switch and pull the body to adjust the posture on the wheelchair by rotating the handle. At the same time, when he needs to rest, he can lock the handle at the current position by rotating the switch, which is easy to use; in addition, It can assist users to switch between different positions independently, so that disabled people with normal arms can complete the switch between different positions independently, get rid of dependence on attendants, and improve their ability to take care of themselves.

Description

A wheelchair with posture adjustment armrest

technical field

The present invention relates to the technical field of behavior assisting devices, and in particular, to a position and posture adjustment armrest for a wheelchair.

Background technique

With the development of population aging, the number of elderly people with reduced physical muscle capacity is increasing. Many elderly and disabled people need to use wheelchairs to travel, and these disabled people often need to use the help of others to switch between beds, wheelchairs, and seats. Take the transition from the bed to the wheelchair as an example. First, you need to help the user sit on the edge of the bed. The escort supports the user's waist face to face, and the user's arm is placed on the escort's shoulder or other positions for relay. Then, the user's body is rotated around the escort and placed on the wheelchair on the side, and then the user's position on the wheelchair can be adjusted. This process requires the assistance of family members or carers, and cannot take care of themselves completely, which is inconvenient in life.

For some users with better hand strength, the wheelchair can be placed obliquely on the side of the bed first, and the user can support the side of the wheelchair or the side of the bed with their hands to support the body, move from the side of the bed to the wheelchair, and then adjust the posture; During this process, the force of the wheelchair is unbalanced, and it is easy to roll or tilt, and there are certain safety hazards.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a posture adjustment armrest which is convenient for users to complete autonomous conversion between the wheelchair and other resting positions.

The present invention solves the above-mentioned technical problems through the following technical solutions: 1. A position and posture adjustment armrest for a wheelchair, characterized in that it comprises a base connected with the wheelchair, a handle and a pole connecting the base and the handle, and the The end is connected with a rotary switch, the rod body of the vertical rod and the base are freely matched in the circumferential direction, and the bottom of the vertical rod is provided with a locking mechanism for fixing the vertical rod in the circumferential direction. Switch between two states of the current rotation position and the fixed cooperation of the locking mechanism.

With the wheelchair posture adjustment handrail provided by the present invention, when the user wants to adjust the position while sitting on the wheelchair, he can hold the handle, control the rotation switch, and pull the body to adjust the posture by turning the handle, and at the same time, when the user needs to rest, the handle can be rotated by rotating the switch. It is locked in the current position, which is convenient to use; in addition, it can assist the user to switch between different positions independently. For example, the user sits on the wheelchair from the bed as an example, first place the wheelchair facing the bed parallel to the bed, and the user uses the arm strength to let himself Sit on the edge of the bed, put the foot close to the wheelchair in front of the other foot, then hold the handle with both hands, prop up the body with force, and then control the turn switch to disengage the pole from the locking mechanism, and use the hands to drive the waist forcefully Rotate the relative pole to the wheelchair position, and then sit on the wheelchair; so that the disabled person with normal arms can complete the conversion of different positions independently, get rid of the dependence on the escort personnel, and improve the self-care ability of life.

Preferably, the locking mechanism includes a fixed brake disc that is fixedly matched with the vertical rod and a movable brake disc that can move in a vertical direction, and the movable brake disc is locked in the circumferential direction; the fixed brake disc and the movable brake disc The opposite surfaces of the brake discs are respectively provided with protruding teeth that can engage with each other, and the rotary switch can control the movable brake disc to change its position along the vertical direction.

Preferably, a bearing seat is fixed on the base through a flange, the inner ring of the bearing is fixedly matched with the rod body of the vertical rod, the flange is fixedly matched with the base, and a bearing cover is also fixed on the upper end surface of the bearing seat.

Preferably, the rotary switch is connected with a gate wire, the gate wire is fixedly connected to the movable brake disc through the flange plate, and a return spring limited between the flange disc and the movable brake disc is sleeved on the gate wire; The rotary switch can pull up the gate wire.

Preferably, a pull-up plate is fixed on the movable brake disc in a horizontal direction, a brake bean is screwed on the pull-up plate in a horizontal direction, and the brake wire is fixedly matched with the brake bean.

Preferably, a linear bearing is fixed on the flange in a vertical direction, and a guide shaft slidingly matched with the linear bearing is arranged on the movable brake disc in a vertical direction.

Preferably, the rotary switch includes an annular sleeve, a push plate and a gate wire sleeve; the normal direction of the push plate is perpendicular to the axial direction of the annular sleeve, and one end of the gate wire matched with the rotary switch has a wire buckle, and the gate wire One end face of the sleeve is provided with an accommodating hole cooperating with the gate wire buckle in the axial direction, the surface of the accommodating hole has a strip-shaped groove along the axial direction for the gate wire to pass through, and the lower surface of the strip-shaped groove is provided with the gate wire. The gate groove hidden under the surface of the gate sleeve;

A switch seat is fixed at the top of the vertical rod, and the switch seat at least includes a fixed plate fixedly matched with the upper end face of the vertical rod and a side plate vertically connected with the fixed plate, and the fixed plate has a through hole for the gate wire to pass through. , the side plate is provided with a fixed shaft that is rotatably matched with the annular sleeve.

Preferably, the switch seat is further provided with a cover that closes the switch seat, and the upper surface of the cover has an adjustment groove for the push plate to swing; the cover is engaged with the switch seat, and the surface of the cover is fixed with screws through screws The shaft is fixedly connected.

Preferably, the handle at least comprises a transverse handle and two vertical handles arranged at both ends of the transverse handle and perpendicular to the transverse handle, and a fixing member for connecting the handle is fixedly arranged on the riser, and the fixing member Fits firmly with the horizontal grip of the handle.

Preferably, one end of the base facing the wheelchair is detachably connected to the bottom of the wheelchair, and the bottom of the base has walking wheels.

The advantages of the position and posture adjustment armrest for a wheelchair provided by the present invention are: when the user wants to adjust the position while sitting on the wheelchair, he can hold the handle, control the rotation switch, and pull the body to adjust the posture by turning the handle. Lock the handle in the current position, which is convenient to use; in addition, it can assist the user to switch between different positions autonomously. For example, the user sits on the wheelchair from the bed as an example, first place the wheelchair facing the bed parallel to the bed, and the user uses arm strength. Let yourself sit on the edge of the bed, put the foot close to the wheelchair in front of the other foot, then hold the handle with both hands, prop up the body with force, and then control the turn switch to release the pole from the locking mechanism, and use force with your hands Drive the waist relative to the pole to rotate to the wheelchair position, and then sit on the wheelchair; so that the disabled person with normal arms can complete the conversion of different positions independently, get rid of the dependence on the escort personnel, and improve the self-care ability. Through the cooperation of the fixed brake disc and the movable brake disc in the vertical direction, the locking and rotation adjustment of the pole can be realized, which is convenient to use; The cooperation of the bearing and the guide shaft ensures the stable movement of the movable brake disc; the connection between the rotary switch and the gate wire is facilitated by the cooperation of the switch seat and the cover; the assembly is convenient.

Description of drawings

FIG. 1 is a schematic diagram of the use state of the position and posture adjustment armrest for a wheelchair provided by an embodiment of the present invention;

2 is a schematic diagram of a wheelchair posture adjustment armrest provided by an embodiment of the present invention;

3 is a schematic diagram of a locking mechanism of a wheelchair posture adjustment armrest provided by an embodiment of the present invention;

4 is a cross-sectional view of a locking mechanism of a wheelchair posture adjustment armrest provided by an embodiment of the present invention;

5 is a schematic diagram of a movable brake disc of a wheelchair posture adjustment armrest provided by an embodiment of the present invention;

6 is a schematic structural diagram of a flange plate of a wheelchair posture adjustment armrest provided by an embodiment of the present invention;

FIG. 7 is an exploded view of the mating state of the rotary switch of the wheelchair posture adjustment armrest and the switch seat provided by the embodiment of the present invention;

FIG. 8 is a schematic diagram of a state in which a switch seat of a wheelchair posture adjustment armrest and a vertical pole are matched according to an embodiment of the present invention;

FIG. 9 is an enlarged view of part A in FIG. 2 .

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

1 and 2, the present embodiment provides a handrail for posture adjustment for a wheelchair, including a base 11 connected to the wheelchair 1, a handle 2, and a pole 3 connecting the base 1 and the handle 2, the pole The end of 3 is connected with a rotary switch 4, the rod body of the vertical rod 3 is freely matched with the base 11 in the circumferential direction, and the bottom of the vertical rod 3 is provided with a locking mechanism 5 for fixing the vertical rod 3 in the circumferential direction. The rotary switch 4 The vertical rod 3 can be switched between two states of free rotation and fixed cooperation with the locking mechanism 5 at the current rotation position.

When the user sits on the wheelchair 1 and wants to adjust the position, he can hold the handle 2, control the rotary switch 4, and adjust the posture by turning the handle 2 to pull the body. It is easy to use; in addition, it can assist the user to switch between different positions independently. For example, the user sits on the wheelchair 1 from the bed as an example, first place the wheelchair 1 on the side of the bed parallel to the bed, and let the user sit on the edge of the bed with the help of arm strength. , put the foot close to the wheelchair 1 in front of the other foot, then hold the handle with both hands, support the body with force, and then control the rotation switch 4 to release the pole 3 from the locking mechanism 5. The waist is rotated relative to the pole 3 to the position of the wheelchair 1, and then sits on the wheelchair 1; so that the disabled person with normal arms can independently complete the conversion of different positions, get rid of the dependence on the escort personnel, and improve the self-care ability.

Referring to FIG. 3 , the locking mechanism 5 includes a fixed brake disc 51 that is fixedly matched with the vertical rod 3 and a movable brake disc 52 that can move in a vertical direction. The movable brake disc 52 is locked in the circumferential direction, and the fixed The opposite sides of the brake disc 51 and the movable brake disc 52 are respectively provided with protruding teeth (not shown) that can engage with each other; in conjunction with FIG. There is a convex block 33 on the outer peripheral surface, and the inner ring of the fixed brake disc 51 is provided with a limit groove 57 along the axial direction that cooperates with the convex block 33. The fixed brake disc 51 is sleeved on the vertical rod 3 and fixed by a nut. The cooperation of 33 and the limit groove 57 realizes the circumferential locking of the fixed brake disc 51 and the vertical rod 3; Keys (not shown) form the bumps 33 .

A bearing seat 31 is fixed on the base 11 through the flange plate 12, the inner ring of the bearing (not shown) on the bearing seat 31 is fixedly matched with the rod body of the vertical rod 3, and the upper end surface of the bearing seat 31 is also fixed with a bearing cover 32. The bearing seat 31, the bearing cover 32 and the flange 12 are integrally fixed together by bolts; the flange 12 is fixed on the base 11 by bolts.

3 and 4, the rotary switch 4 is connected with a gate wire 41, the gate wire 41 is fixedly connected to the movable brake disc 52 through the flange 12, and the gate wire 41 is sleeved with a flange that is limited in the flange. The return spring 53 between the disc 12 and the movable brake disc 52 pulls up the gate wire 41 by controlling the rotary switch 4, thereby pulling up the movable brake disc 52 and disengaging the fixed brake disc 51, and the vertical rod 3 can rotate freely, After the rotary switch 4 is released, the return spring 53 automatically drives the movable brake disc 52 to descend to cooperate with the fixed brake disc 51 , thereby locking the vertical rod 3 at the current position.

5, the movable brake disc 52 is fixed with a pull-up plate 54 along the horizontal direction, and a brake bean 55 is fixed on the pull-up plate 54 along the horizontal direction, and the brake wire 41 is fixedly matched with the brake bean 55; 41 pulls the lift plate 54 to rise, thereby causing the movable brake disc 52 to rise.

Referring to FIG. 4, in order to improve the stability of the movable brake disc 52, the flange 12 is also fixed with a linear bearing 13 in the vertical direction, and the movable brake disc 52 is provided with a sliding fit with the linear bearing 13 in the vertical direction. The guide shaft 56; the cooperation of the guide shaft 56 and the linear bearing 13 can not only guide the movable brake disc 52, but also prevent the movable brake disc 52 from tilting, so as to ensure that the movable brake disc 52 can be completely disengaged from the fixed brake disc 51 when pulled up. .

The gate line 41 is sleeved in a gate line tube 42, the gate line tube 42 passes through the vertical rod 3, a through groove 35 is opened on the side wall of the lower end of the vertical rod 3, and the gate line tube 42 extends from the through groove. 35 away from the vertical rod 3 and pass through the flange 12; with reference to FIG. 6, the flange 12 and the gate tube 42 are fixedly provided with a gate plate 14, and the two ends of the gate plate 14 are connected to the flange 14. The flange plate 12 is fixedly connected, the middle part has a gap with the flange plate 12, the gate plate 14 and the flange plate 12 are provided with hollow bolts 15 that allow the gate wire 41 to pass through, and the gate plate 14 is provided with hollow bolts below 15 is screwed with the fixed locking bolt 16, and the end of the brake line tube 42 is limited by the end of the hollow bolt 15 to prevent the brake line tube 42 from moving when the brake line 41 is pulled.

2 and 7 , the rotary switch 4 includes an annular sleeve 43 , a push plate 44 and a gate wire sleeve 45 , the normal direction of the push plate 44 is perpendicular to the axial direction of the annular sleeve 43 , the gate wire 41 is connected to the rotation The matched end of the switch 4 has a gate wire buckle 411 , one end surface of the gate wire sleeve 45 has a receiving hole 451 which is axially matched with the gate wire buckle, and the surface of the receiving hole 451 has a hole for the gate wire 41 to pass through along the axial direction Bar-shaped slot 452, the lower surface of the bar-shaped slot 452 is provided with a gate wire slot 453 for hiding the gate wire 41 under the surface of the gate wire sleeve 45; with reference to FIG. 8, a switch seat is fixed on the top of the vertical rod 3 36. The switch seat 36 at least includes a fixing plate 361 that is fixedly matched with the upper end face of the vertical rod 3 and a side surface 362 that is vertically connected to the fixing plate 361. The fixing plate 361 has a through hole for the gate wire 41 to pass through. The side plate 362 is provided with a fixed shaft 363 that is rotatably matched with the annular sleeve 43; the annular sleeve 43 is inserted on the fixed shaft 363, so that the gate wire buckle 411 is inserted into the accommodating hole 451 in the axial direction, and the gate wire 41 is along the strip. The shape groove 452 moves forward, and after the gate wire buckle 411 is assembled in place, the gate wire 41 is hidden in the gate wire groove 453, so as to prevent the gate wire buckle 411 from disengaging from the rotary switch 4, so that by moving the push plate 44 away from the gate wire sleeve 45 One side pushes and pulls the brake wire 41 and pulls the movable brake disc 52 up.

In order to prevent the brake wire tube 42 from moving, the side plate 362 is further provided with a blocking plate 364 which is matched with the brake wire tube 42. The blocking plate 364 has a blocking hole 365 for the gate wire 41 to pass through. There is a gap (not shown) for allowing the gate wire 41 to pass through, and the diameter of the blocking hole 365 is smaller than the diameter of the gate wire tube 42 . Put the gate wire 41 through the notch and put it in the blocking hole 365, so as to block and limit the gate wire tube 42, and make the gate wire buckle 411 above the blocking hole 365, so that when the gate wire 41 is pulled, the gate wire tube can be ensured. 42 will not be pulled.

The accommodating hole 451 can pass through the gate wire sleeve 45 in the axial direction, or can be set as a blind hole. Similarly, the strip groove 452 can also pass through the gate wire sleeve 45 or only through the opening end of the accommodating hole 451; this embodiment The blocking plate 364 is fixed in the horizontal direction, and the bottom surface of the brake wire sleeve 45 is matched with the upper surface of the blocking plate 364. During installation, the blocking plate 364 is on the side close to the wheelchair 1, and the fixed shaft 363 is far away from the wheelchair 1. side. The switch seat 36 also has a cover 37 that closes the switch seat 36. The cover 37 cooperates with the switch seat 36 to form a closed cavity. The upper surface of the cover 37 has an adjustment groove 371 for the push plate 44 to swing. The shell 37 is engaged with the switch seat 36 , and the surface of the cover shell 37 is fixedly connected to the fixed shaft 363 through screws 372 .

Referring to FIG. 2 , the handle 2 at least includes a horizontal handle 21 and two vertical handles 22 arranged at both ends of the horizontal handle 21 and perpendicular to the horizontal handle 21 , and the riser 3 is provided with a connecting handle 2 . The fixing piece 23, the fixing piece 23 has an arc-shaped part (not shown in the figure) that is engaged with the horizontal handle 21 and a connecting plate (not shown in the figure) arranged at one end of the arc-shaped part. The connecting plate is screwed with the vertical rod 3. The arc part is engaged with the middle position of the horizontal handle 21 and fixed by bolts. In this embodiment, the ends of the two vertical handles 22 are further extended inwardly with a rotating handle 24 parallel to the horizontal handle 21 , so that the handle has a rectangular structure as a whole, and there is a gap between the two rotating handles 24 , it can also be set in a form without gaps, that is, the ends of the two vertical handles 22 are directly connected by the rotating handle 24 .

Referring to FIG. 1 again, the end of the base 11 facing the wheelchair 1 is detachably connected to the bottom of the wheelchair 1. In this embodiment, the connection is made by bolts. In specific use, it can be designed according to the structure of the wheelchair. At the same time, the bottom of the base 11 is connected. Set the walking wheel; the distance between the handle 2 and the wheelchair 1 should be able to put down shoes to prevent the user's comfort from being affected, and the connection part between the base 11 and the wheelchair 1 can be structured to form a pedal for placing the user's feet (not shown); the pedals can also be set in a rotatable form following the structure of the existing wheelchair, so as to facilitate the user to directly touch the ground with their feet.

During use, since all the user's strength acts on the handle 2 , the wheelchair 1 may fall over. Therefore, it is necessary to fix the wheelchair 1 on the bottom surface or increase the counterweight to ensure the stability of the wheelchair 1 .

Referring to FIG. 9 , in order to prevent the user from falling due to the excessive rotation of the vertical rod 3, in this embodiment, a limit plate 34 is also provided at the position where the circumferential surface of the vertical rod 3 and the bearing cover 32 are matched. Two limit blocks 321 are provided on the surface to limit the rotation range of the vertical rod 3 .

Claims (10)

1. A position and posture adjustment armrest for a wheelchair is characterized in that: it comprises a base connected with the wheelchair, a handle and a pole connecting the base and the handle, the end of the pole is connected with a rotary switch, and the pole body of the pole is The seat is freely matched along the circumferential direction, and the bottom of the pole is provided with a locking mechanism that fixes the pole along the circumferential direction. switch between. 2 . The position and posture adjustment armrest for a wheelchair according to claim 1 , wherein the locking mechanism comprises a fixed brake disc fixedly matched with the vertical rod and a movable brake disc capable of moving in a vertical direction, 2 . The movable brake disc is locked in the circumferential direction; the opposite surfaces of the fixed brake disc and the movable brake disc are respectively provided with protruding teeth that can engage with each other, and the rotating switch can control the movable brake disc to change its position in the vertical direction. 3. The wheelchair posture adjustment handrail according to claim 2, wherein a bearing seat is fixed on the base through a flange, the inner ring of the bearing is fixedly matched with the rod body of the vertical rod, and the flange The disc is fixedly matched with the base, and a bearing cover is also fixed on the upper end face of the bearing seat. 4 . The position adjustment armrest for a wheelchair according to claim 3 , wherein the rotary switch is connected with a brake wire, the brake wire is fixedly connected to the movable brake disc through the flange, and the brake wire is fixedly connected to the movable brake disc. 5 . A return spring which is limited between the flange plate and the movable brake disc is sleeved; the rotary switch can pull up the brake wire. 5 . The position and posture adjustment armrest for a wheelchair according to claim 4 , wherein a pull-up plate is fixed on the movable brake disc along the horizontal direction, and a brake is screwed on the pull-up plate along the horizontal direction. 6 . The brake line is fixedly matched with the brake bean. 6. A wheelchair posture adjustment armrest according to claim 4 or 5, characterized in that: a linear bearing is fixed on the flange in a vertical direction, and a movable brake disc is arranged in a vertical direction with a Linear bearing sliding fit guide shaft. 7 . The position and posture adjustment armrest for a wheelchair according to claim 4 , wherein the rotary switch comprises an annular sleeve, a push plate and a gate wire sleeve; the normal direction of the push plate is the same as the axial direction of the annular sleeve. 8 . Vertically, one end of the gate wire that is matched with the rotary switch has a gate wire buckle, one end surface of the gate wire sleeve has an accommodating hole that cooperates with the gate wire buckle in the axial direction, and the surface of the accommodating hole has an axial direction for the gate wire to pass through. The bar-shaped slot that has passed through, the lower surface of the bar-shaped slot is provided with a gate wire slot for hiding the gate wire under the surface of the gate wire sleeve; A switch seat is fixed at the top of the vertical rod, and the switch seat at least includes a fixed plate fixedly matched with the upper end face of the vertical rod and a side plate vertically connected with the fixed plate, and the fixed plate has a through hole for the gate wire to pass through. , the side plate is provided with a fixed shaft that is rotatably matched with the annular sleeve. 8 . The position adjustment armrest for a wheelchair according to claim 4 , wherein the switch seat is further provided with a cover that closes the switch seat, and the upper surface of the cover has a support for the push plate to swing. 9 . Adjustment slot; the cover is engaged with the switch seat, and the surface of the cover is fixedly connected with the fixed shaft through screws. 9 . The position and posture adjustment armrest for a wheelchair according to claim 1 , wherein the handle at least comprises a transverse handle and two vertical handles arranged at both ends of the transverse handle and perpendicular to the transverse handle. 10 . , a fixing piece connecting the handle is fixedly arranged on the stand pipe, and the fixing piece is fixedly matched with the horizontal handle of the handle. 10 . The position-adjustment armrest for a wheelchair according to claim 1 , wherein one end of the base facing the wheelchair is detachably connected to the bottom of the wheelchair, and the bottom of the base has walking wheels. 11 .

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