Auxiliary stair climbing device for wheelchair

Abstract

The invention discloses an auxiliary stair climbing device for a wheelchair. The auxiliary stair climbing device comprises a climbing main machine, a mechanical arm and a wheelchair fixator. The mechanical arm is a multi-degree-of-freedom mechanical arm and is used for adjusting the up-and-down position and the front-and-back position of the wheelchair fixator; the wheelchair fixator is of a folding structure and comprises a safety pressing rod, a backrest plate, a seat cushion plate, a seat support and a bottom plate. The safety pressing rod can rotate and fold up and down relative to the backrest plate to be erected or laid down, the seat cushion plate can rotate and fold back and forth relative to the backrest plate to be erected or laid down, and a limiting piece used for clamping a wheelchair is arranged on the seat cushion plate. The lower end of the backrest plate is connected with the seat support, bottom plates are arranged on the left side and the right side of the bottom of the seat support respectively, and wheel guide grooves are formed in the bottom plates. The up-down and front-back positions of the wheelchair fixing device can be adjusted, the position adjusting requirement of a user can be met, the wheelchair fixing device is of a folding structure, the wheelchair fixing device can be folded when not used at ordinary times, the size can be reduced, and the occupied space can be reduced.

Description

Technical Field

[0001] The present invention relates to the field of wheelchair auxiliary devices, and in particular to a wheelchair auxiliary stair climbing device. Background Art

[0002] At present, in order to facilitate some patients with inconvenient legs and feet or the elderly to climb stairs conveniently when sitting in a wheelchair, some stair climbing devices have appeared in the relevant technology.

[0003] There are two main types of stair climbing devices of this type: one is to improve the wheelchair itself and design the wheelchair into a stair climbing wheelchair. Common stair climbing wheelchairs in the prior art mainly include full-wheel, tracked, and star-wheel types. These stair climbing wheelchairs are expensive and can only meet the stair climbing needs of a single user. Therefore, they are mostly used for family self-equipment and are not suitable for use in public places such as bus stations and subway stations.

[0004] The other is a track-type stair climbing device that is more commonly used in public places. This device has a track set along the stair wall or handrail, and a climbing host that can slide along the track is provided on the track. The climbing host is provided with a wheelchair holder for fixing the wheelchair. When the climbing host runs along the track, it can drive the wheelchair holder to move, thereby transporting the user to the destination, realizing a function similar to an "elevator". In the prior art, the angle of the wheelchair holder of this track-type stair climbing device cannot be adjusted well, and cannot meet the user's position adjustment needs. In addition, it cannot be folded, and will occupy a part of the space when not in use, affecting other people's normal up and down stairs. Therefore, it needs to be optimized and improved. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a wheelchair-assisted stair climbing device.

[0006] The technical solution of the present invention is as follows: A wheelchair-assisted stair climbing device comprises a track arranged beside the staircase and a climbing host connected to the track, characterized in that it also comprises a mechanical arm and a wheelchair holder;

[0007] The mechanical arm is connected to the wheelchair holder, and the mechanical arm is a multi-degree-of-freedom mechanical arm, and the mechanical arm is used to adjust the up-down and front-back positions of the wheelchair holder;

[0008] The wheelchair holder is a folding structure, and the wheelchair holder includes a safety pressure rod, a backrest board, a seat pad, a seat bracket and a bottom plate; the safety pressure rod is rotatably arranged at the upper end of the backrest board, and the safety pressure rod can be rotated up and down relative to the backrest board to be folded to stand up or put down, the backrest board is provided with a notch, and the seat pad is rotatably arranged at the bottom of the notch, and the seat pad can be rotated forward and backward relative to the backrest board to be folded to stand up or put down, and the seat pad is provided with a limiting piece for clamping the wheelchair; the lower end of the backrest board is connected to the seat bracket, and the seat bracket is connected to the mechanical arm, and the bottom plates are respectively provided on the left and right sides of the bottom of the seat bracket, and the bottom plate is provided with wheel guide grooves extending in the front-rear direction.

[0009] Furthermore, the climbing host is provided with a rotating screen capable of human-computer interaction.

[0010] Furthermore, the mechanical arm is an electric mechanical arm, and the mechanical arm is connected to the climbing host.

[0011] Furthermore, the seat bracket is formed by bending a plate body, and the seat bracket includes an upper plate body, a front inclined plate, a lower plate body and a rear inclined plate, the upper plate body is connected to the backrest plate, the front inclined plate is arranged on the lower side of the upper plate body, the lower plate body is arranged at the bottom of the front inclined plate, the rear side of the lower plate body is arranged, the rear inclined plate is inclined upward toward the front inclined plate, a plurality of slots are arranged on the front inclined plate, a protrusion is arranged on the upper end of the rear inclined plate, the protrusion is inserted into one of the slots, and the bottom plate is arranged on the left and right sides of the lower plate body.

[0012] Furthermore, the bottom plate is composed of two splicing plates which are arranged opposite to each other, one in front and one in the back. The two splicing plates are respectively rotatably connected to the seat brackets so as to be erected or lowered.

[0013] Furthermore, a placement groove is provided on the upper surface of the seat cushion, and the limiting member includes a pawl, a spring, a pressure block and a knob. The pawl and the pressure block are both rotatably arranged in the placement groove, the pawl is connected to the seat cushion by a spring and the upper end of the pawl will extend out of the placement groove under the action of the spring, the pressure block is adjacent to the pawl, the knob is arranged on the side of the seat cushion and connected to the block, and a rotatable pawl is provided at the bottom of the wheelchair seat, the pawl engages with the ratchet under the action of the spring, and the knob can drive the pressure block to rotate so that the pressure block squeezes the pawl to force the pawl to separate from the ratchet.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Compared with conventional wheelchair-assisted stair climbing devices, the wheelchair holder in this device is adjustable in up and down, front and back positions, which can meet the user's position adjustment needs. Moreover, the wheelchair holder itself is a foldable structure and can be folded when not in use, which can reduce the volume and occupy less space.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. 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 drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:

[0018] Figure 1 It is an overall schematic diagram of the present invention;

[0019] Figure 2 is a schematic diagram of the climbing host part of the present invention;

[0020] Figure 3 is a front side schematic diagram of a wheelchair fastener of the present invention;

[0021] Figure 4 is a schematic diagram of the rear side of the wheelchair fastener of the present invention;

[0022] Figure 5 is a left side view of the wheelchair fastener of the present invention;

[0023] Figure 6 It is a schematic diagram of the position limiting member of the present invention.

[0024] Reference numerals:

[0025] 1. Climbing host; 2. Rotating screen; 3. Mechanical arm; 4. Safety pressure bar; 5. Backrest plate; 6. Seat pad; 7. Seat bracket; 8. Bottom plate; 9. Notch; 10. Upper plate; 11. Front inclined plate; 12. Lower plate; 13. Rear inclined plate; 14. Slot; 15. Protrusion; 17. Splicing plate; 18. Wheel guide groove; 19. Placement groove; 20. Paw; 21. Ratchet; 22. Spring; 23. Pressure block. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0027] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. In the description of the present invention, it should be understood that the orientations or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "vertical", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] In the description of the present invention, "first feature" and "second feature" may include one or more of the features. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0030] like Figure 1-Figure 6 The wheelchair-assisted stair climbing device shown includes a track arranged beside the stairs and a climbing main unit 1 connected to the track. The climbing main unit 1 is provided with a sliding mechanism that can move along the track. This climbing method belongs to the prior art and is well known to those skilled in the art and will not be described in detail.

[0031] The device also includes a mechanical arm 3 and a wheelchair fixture. The mechanical arm 3 is connected to the wheelchair fixture. The mechanical arm 3 is a multi-degree-of-freedom mechanical arm 3. The mechanical arm 3 is used to adjust the up and down and front and back positions of the wheelchair fixture.

[0032] The wheelchair holder is a folding structure, which includes a safety pressure rod 4, a backrest board 5, a seat pad 6, a seat bracket 7 and a bottom plate 8; the safety pressure rod 4 is rotatably arranged at the upper end of the backrest board 5, and the safety pressure rod 4 can be rotated up and down relative to the backrest board 5 to be erected or put down, a notch 9 is provided on the backrest board 5, and a seat pad 6 is rotatably arranged at the bottom of the notch 9, and the seat pad 6 can be rotated forward and backward relative to the backrest board 5 to be erected or put down, and a limiting piece for clamping the wheelchair is provided on the seat pad 6; the lower end of the backrest board 5 is connected to the seat bracket 7, and the seat bracket 7 is connected to the mechanical arm 3, and the bottom plates 8 are respectively provided on the left and right sides of the bottom of the seat bracket 7, and the bottom plate 8 is provided with a wheel guide groove 18 extending along the front and rear direction.

[0033] Specifically, if Figure 1 and Figure 2 As shown, a mechanical arm 3 is integrated on the climbing host 1 in the device, and the mechanical arm 3 used is an electric mechanical arm 3. The mechanical arm 3 is connected to the climbing host 1, and a rotating screen 2 for human-computer interaction is provided on the climbing host 1. Therefore, when the wheelchair is placed on the wheelchair holder, the user can independently adjust the movement of the mechanical arm 3 through the rotating screen 2. In this way, the mechanical arm 3 can adjust the position of the wheelchair accordingly by adjusting the up and down and front and back positions of the wheelchair holder, thereby meeting the user's position adjustment needs.

[0034] At present, there are many related electric robotic arms 3 products, including four-axis, five-axis, six-axis and other multi-degree-of-freedom robotic arms 3, which have been widely used in real life and have mature technology. Technical personnel in this field can choose and purchase them according to actual design requirements.

[0035] The wheelchair holder in the device is a foldable structure as a whole, and can be folded when not in use to reduce the volume and occupy less space.

[0036] Among them, Figure 3-Figure 5 As shown, the wheelchair holder is provided with a rotating safety pressure bar 4. When the wheelchair is placed on the wheelchair holder, the safety pressure bar 4 on the wheelchair holder can be lowered to fix the shoulders of the user to ensure the safety of the user. When not in use, the safety pressure bar 4 can be erected. In practical applications, the safety pressure bar 4 is usually rotated between the erected and laid positions, and the rotation range is usually 90 degrees. Therefore, the safety pressure bar 4 can use a 90-degree self-locking hinge to achieve a rotation connection with the backrest board 5.

[0037] like Figure 3 and Figure 4As shown, the backrest board 5 is used to limit the backrest of the user's wheelchair, and the notch 9 provided on the backrest board 5 is used for the seat pad 6 to be stored in the notch 9 when it is folded and erected. In actual application, the seat pad 6 is usually rotated between the two positions of standing and laying flat, and the rotation range is usually 90 degrees. Therefore, the seat pad 6 can use a 90-degree self-locking hinge to achieve a rotation connection with the backrest board 5.

[0038] The seat pad 6 is located at the bottom of the user's wheelchair seat when in use. The seat pad 6 is provided with a limiter, which is used to clamp the wheelchair to prevent the wheelchair from sliding outward when climbing stairs, so as to improve the safety of the device.

[0039] There are many types of limiting structures that can achieve locking of the wheelchair. For example, in one embodiment, Figure 6 As shown, a placement groove 19 is provided on the upper surface of the seat cushion 6, and the limiting member includes a pawl 20, a spring 22, a pressure block 23 and a knob. The pawl 20 and the pressure block 23 are both rotatably arranged in the placement groove 19, the pawl 20 is connected to the seat cushion 6 through the spring 22 and the upper end of the pawl 20 will extend out of the placement groove 19 under the action of the spring 22, the pressure block 23 is adjacent to the pawl 20, the knob is arranged on the side of the seat cushion 6 and connected to the block, and a rotatable pawl 20 is provided at the bottom of the wheelchair seat, the pawl 20 is engaged with the ratchet 21 under the action of the spring 22, and the knob can drive the pressure block 23 to rotate so that the pressure block 23 squeezes the pawl 20 to force the pawl 20 to separate from the ratchet 21.

[0040] Specifically, the ratchet wheel 21 and the ratchet pawl 20 are commonly used unidirectional motion structures. Figure 6 Taking the perspective shown as an example, when the wheelchair moves backward onto the seat pad 6, the ratchet 21 at the bottom of the wheelchair rotates counterclockwise when it hits the pawl 20. At this time, the pawl 20 does not jam the ratchet 21. When the ratchet 21 tries to rotate in the opposite direction, it will be jammed by the pawl 20. In this case, the wheelchair will not move forward to leave the seat pad 6. When the wheelchair needs to leave, the knob can be manually turned so that the knob drives the pressing block 23 to rotate. At this time, the pressing block 23 can squeeze the pawl 20 to force the pawl 20 to separate from the ratchet 21. At this time, the pawl 20 no longer jams the ratchet 21, and the wheelchair can leave smoothly.

[0041] like Figure 3-Figure 5As shown, the seat bracket 7 is formed by bending a plate body, and the seat bracket 7 includes an upper plate body 10, a front inclined plate 11, a lower plate body 12 and a rear inclined plate 13. The upper plate body 10 is connected to the backrest plate 5, the front inclined plate 11 is arranged on the lower side of the upper plate body 10, the bottom of the front inclined plate 11 is provided with a lower plate body 12, the rear side of the lower plate body 12 is provided with a rear inclined plate 13, the rear inclined plate 13 is inclined upward toward the front inclined plate 11, a plurality of slots 14 are provided on the front inclined plate 11, and a protrusion 15 is provided on the upper end of the rear inclined plate 13, and the protrusion 15 is inserted into one of the slots 14. By inserting the protrusion 15 into different slots 14, the height of the seat bracket 7 can be adjusted to adapt to the use of wheelchairs of different height models.

[0042] like Figure 3 and Figure 4 As shown, a bottom plate 8 is provided on the left and right sides of the lower plate body 12. The bottom plate 8 is composed of two grooved splicing plates 17 arranged opposite to each other, one in front of the other. The two splicing plates 17 are respectively connected to the seat bracket 7 for rotation to stand up or put down. When the two splicing plates 17 are put down, they can be assembled into a bottom plate 8. The grooves on the two splicing plates 17 can be spliced ​​into a wheel guide groove 18. In practical applications, since the splicing plates 17 are usually rotated between the two positions of standing up and laying flat, and the rotation range is usually 90 degrees, the splicing plates 17 can use 90-degree self-locking hinges to achieve rotational connection with the lower plate body 12.

[0043] To sum up, compared with conventional wheelchair-assisted stair climbing devices, the wheelchair holder in this device is adjustable in up and down, front and back positions, which can meet the user's position adjustment needs. Moreover, the wheelchair holder itself is a foldable structure and can be folded when not in use, which can reduce the volume and occupy less space.

[0044] Although a portion of the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations to these embodiments are within the scope of protection of the claims of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A wheelchair-assisted stair climbing device, comprising a track arranged beside the staircase and a climbing host connected to the track, characterized in that: Also included are robotic arms and wheelchair holders; The mechanical arm is connected to the wheelchair holder, and the mechanical arm is a multi-degree-of-freedom mechanical arm, and the mechanical arm is used to adjust the up-down and front-back positions of the wheelchair holder; The wheelchair holder is a folding structure, and the wheelchair holder includes a safety pressure rod, a backrest board, a seat pad, a seat bracket and a bottom plate; the safety pressure rod is rotatably arranged at the upper end of the backrest board, and the safety pressure rod can be rotated up and down relative to the backrest board to be folded to stand up or put down, the backrest board is provided with a notch, the seat pad is rotatably arranged at the bottom of the notch, the seat pad can be rotated forward and backward relative to the backrest board to be stood up or put down, and the seat pad is provided with a limiting piece for clamping the wheelchair; the lower end of the backrest board is connected to the seat bracket, and the seat bracket is connected to the mechanical arm, and the bottom plates are respectively provided on the left and right sides of the bottom of the seat bracket, and the bottom plate is provided with wheel guide grooves extending in the front-rear direction.

2. The wheelchair-assisted stair climbing device according to claim 1, characterized in that: The climbing host is provided with a rotating screen capable of human-computer interaction.

3. The wheelchair-assisted stair climbing device according to claim 1, characterized in that: The mechanical arm is an electric mechanical arm, and the mechanical arm is connected to the climbing host.

4. The wheelchair-assisted stair climbing device according to claim 1, characterized in that: The seat bracket is formed by bending a plate body, and the seat bracket includes an upper plate body, a front inclined plate, a lower plate body and a rear inclined plate. The upper plate body is connected to the backrest plate, the front inclined plate is arranged on the lower side of the upper plate body, the lower plate body is arranged on the bottom of the front inclined plate, the rear side of the lower plate body is arranged on the rear side, the rear inclined plate is inclined upward toward the front inclined plate, a plurality of slots are arranged on the front inclined plate, a protrusion is arranged on the upper end of the rear inclined plate, the protrusion is inserted into one of the slots, and the bottom plate is arranged on the left and right sides of the lower plate body.

5. The wheelchair-assisted stair climbing device according to claim 1, characterized in that: The bottom plate is composed of two splicing plates which are arranged opposite to each other, one in front and one in the back. The two splicing plates are respectively connected to the seat brackets for rotation so as to be erected or put down.

6. The wheelchair-assisted stair climbing device according to claim 1, characterized in that: The upper surface of the seat cushion is provided with a placement groove, and the limiting member includes a pawl, a spring, a pressure block and a knob. The pawl and the pressure block are both rotatably arranged in the placement groove, the pawl is connected to the seat cushion by a spring and the upper end of the pawl will extend out of the placement groove under the action of the spring, the pressure block is adjacent to the pawl, the knob is arranged on the side of the seat cushion and connected to the block, and a rotatable pawl is provided at the bottom of the wheelchair seat, the pawl is engaged with the ratchet under the action of the spring, and the knob can drive the pressure block to rotate so that the pressure block squeezes the pawl to force the pawl to separate from the ratchet.

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