Multi-dimensional adjustable wheelchair pedal structure and wheelchair

Abstract

The invention discloses a multi-dimensional adjustable wheelchair pedal structure in the field of medical instruments. The multi-dimensional adjustable wheelchair pedal structure comprises a pedal assembly and a connecting frame. The pedal assembly comprises a pedal and a Y2-axis rotating seat, the pedal is connected with the Y2-axis rotating seat through a first movable assembly, and the pedal has combined motion freedom degrees in an XZ plane and a YZ plane; the Y2-axis rotating seat is movably connected with the connecting frame through a second movable assembly, and the Y2-axis rotating seat axially rotates around the second movable assembly and has the motion freedom degree of an XY plane; the first movable assembly and the second movable assembly are designed on the pedal, so that the pedal can rotate around the connecting frame, meanwhile, the pedal can be driven by the first movable assembly to move in the XZ plane and the YZ plane in a combined mode, the movement freedom degree in the space of the pedal is high, more angles and inclination can be adjusted to serve a patient, and the applicability is higher.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a multi-dimensionally adjustable wheelchair foot pedal structure and a wheelchair. Background Art

[0002] Since DMD patients lose muscle function during their childhood growth and development, the normal growth and shaping of the bones in the feet will be affected, causing the bone development to deviate from the normal trajectory, resulting in deformities such as clubfoot and calcaneal valgus. The existing wheelchair pedal adjustment methods mainly include height adjustment and single-dimensional rotation and folding operations. They cannot meet the needs of DMD patients, so a suitable pedal needs to be customized to provide certain support and correction for the deformed feet. Summary of the invention

[0003] The purpose of the present application is to provide a multi-dimensionally adjustable wheelchair foot pedal structure and a wheelchair to solve the defects of the prior art that the wheelchair foot pedal has a small range of motion and is not conducive to patient foot support.

[0004] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions: In a first aspect, the present application discloses a multi-dimensionally adjustable wheelchair footrest structure, which includes a pedal assembly and a connecting frame; The pedal assembly includes a pedal and a Y2-axis rotating seat, the pedal is connected to the Y2-axis rotating seat via a first movable assembly, and the pedal has a combined degree of freedom of motion in an XZ plane and a YZ plane; The Y2-axis rotating seat is movably connected to the connecting frame via a second movable component. The Y2-axis rotating seat rotates axially around the second movable component and has a degree of freedom of movement in an XY plane.

[0005] In a further solution of the present application, the first movable assembly includes a Y2-axis rotating arm and a screw adjustment assembly; One end of the Y2-axis rotating arm is hinged to the Y2-axis rotating seat; the pedal is movably connected to the Y2-axis rotating arm through the X-axis locking bracket and the X-axis bracket to achieve the movement of the pedal in the ZY plane, and the two ends of the screw adjustment assembly are correspondingly movably connected to the Y2-axis rotating arm and the Y2-axis rotating seat; the screw adjustment assembly works to drive the Y2-axis rotating arm to rotate.

[0006] A further solution is that the screw adjustment assembly includes a Y2-axis screw and a nut, the nut is threadedly assembled with the Y2-axis screw, the Y2-axis screw is rotatably installed in the mounting groove of the Y2-axis rotating seat, a connecting rod is provided between the nut and the Y2-axis rotating arm, one end of the connecting rod is hinged to the nut, and the other end is hinged to the Y2-axis rotating arm, the Y2-axis screw rotates to switch the nut adjustment position, thereby realizing the movement of the Y2-axis rotating arm in the XZ plane.

[0007] In a further solution, an X-axis locking screw is provided on one side of the pedal, and the X-axis locking screw is rotatably connected to the pedal and cooperates with the X-axis locking bracket; the X-axis locking screw is rotated to fix the X-axis locking bracket to the Y2-axis rotating arm.

[0008] According to a further solution of the present application, the second movable component includes a Z-axis locking bracket and a Z-axis hinge shaft, the Z-axis locking bracket is fixedly connected to the connecting frame, the Z-axis hinge shaft is sleeved in the installation cavity of the Z-axis locking bracket, and the Y2-axis rotating seat is connected to the Z-axis hinge shaft through a Z-axis rotating arm.

[0009] In a further solution, a Y1-axis angle adjuster is further provided between the Y2-axis rotating seat and the Z-axis hinge shaft; The Y1-axis angle adjuster includes a fixed part and a movable part that are rotatably connected. The fixed part is fixed to the Z-axis rotating arm, and the movable part is fixed to the Y2-axis rotating seat. A Y1-axis knob is installed on the Z-axis rotating arm, and the Y1-axis knob is connected to the drive part of the Y1-axis angle adjuster.

[0010] According to a further solution of the present application, a protective edge is provided on one side of the pedal close to the connecting frame.

[0011] According to a further solution of the present application, there are two pedal assemblies, and the two pedal assemblies are symmetrically arranged on both sides of the connecting frame.

[0012] In a second aspect, the present application discloses a wheelchair comprising the above-mentioned multi-dimensionally adjustable wheelchair footrest.

[0013] The beneficial effects of this application are: In the present application, a first movable component and a second movable component are designed on the pedal so that the pedal can rotate around the connecting frame. At the same time, the pedal can also move in a combined manner in the XZ plane and the YZ plane under the drive of the first movable component. The pedal has a high degree of freedom of movement in space, can adjust more angles and inclinations to serve patients, and is more applicable.

[0014] A Y1-axis angle adjuster is provided before the Y2-axis rotating seat and the Z-axis hinge axis, so that the entire pedal can be folded toward the connecting frame, thereby reducing the space occupied during transportation or storage and facilitating storage and transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the single-side structure of a multi-dimensionally adjustable wheelchair footrest in an embodiment of the present application; Figure 2 This is a schematic diagram of the internal structure of a single side of a multi-dimensionally adjustable wheelchair footrest in an embodiment of the present application; Figure 3 This is a schematic diagram of the structure of the Y1-axis angle adjuster in the embodiment of the present application; Figure 4 This is a schematic diagram of the overall structure of a multi-dimensionally adjustable wheelchair footrest in an embodiment of the present application; Figure 5 This is a schematic diagram of the structure after the pedal is rotated in the embodiment of the present application; Figure 6 for Figure 5 Enlarged view of point I in the middle.

[0016] in: 1. Connecting frame; 2. Z-axis locking bracket; 3. Z-axis hinge shaft; 4. Z-axis rotating arm; 5. Z-axis locking bolt; 6. Y1-axis knob; 7. Y1-axis angle adjuster; 8. Y2-axis rotating seat; 9. Y2-axis rotating arm; 10. Y2-axis screw; 11. Y2-axis rotating shaft; 12. X-axis locking screw; 13. X-axis locking bracket; 14. X-axis bracket; 15. Pedal; 16. Nut; 17. Connecting rod. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.

[0018] The present embodiment discloses a multi-dimensionally adjustable wheelchair pedal structure. Compared with the pedal 15 of a conventional wheelchair, this pedal structure has a higher degree of freedom of movement, and can basically achieve movement and steering in space, which is beneficial to the use of DMD patients with deformed feet. It includes a pedal assembly and a connecting frame 1; the pedal assembly includes a pedal 15 and a Y2-axis rotating seat 8, the pedal 15 is connected to the Y2-axis rotating seat 8 through a first movable assembly, and the pedal 15 has a combined degree of freedom of movement in the XZ plane and the YZ plane; the Y2-axis rotating seat 8 is movably connected to the connecting frame 1 through a second movable assembly, and the Y2-axis rotating seat 8 rotates axially around the second movable assembly, and has the degree of freedom of movement in the XY plane. This pedal 15 can rotate around the X, Y, and Z axes in space.

[0019] In some embodiments, the structure of the multi-dimensionally adjustable wheelchair footrest 15 is designed as follows; As attached Figure 1 and Figure 2 , the first movable component in this embodiment includes a Y2-axis rotating arm 9 and a screw adjustment component; one end of the Y2-axis rotating arm 9 is hinged to the Y2-axis rotating seat 8; one end of the Y2-axis rotating arm 9 is fixed with two parallel side plates, and the side plates are rotatably mounted on the Y2-axis rotating seat 8 using the Y2-axis rotating shaft 11. In addition, the pedal 15 is hinged to the Y2-axis rotating arm 9 through the X-axis locking bracket 13 and the X-axis bracket 14. At this time, the Y2-axis rotating arm 9 can rotate around the connection of the Y2-axis rotating shaft 11, and the pedal 15 can rotate around the axial direction of the Y2-axis rotating arm 9. An X-axis locking screw 12 is set on one side of the pedal 15, and the X-axis locking screw 12 is rotatably connected to the pedal 15 and cooperates with the X-axis locking bracket 13; refer to the attached Figure 5 and Figure 6 The X-axis locking bracket 13 is provided with a locking gap, and convex plates extend on both sides of the locking gap. The X-axis locking screw 12 is rotatably mounted on the pedal 15. The X-axis locking screw 12 spirally passes through the convex plate on one side and is rotatably connected to the convex plate on the other side; When in use, when the X-axis locking screw 12 is rotated, the two side convex plates are brought closer to each other, so that the locking gap becomes smaller, and the X-axis locking bracket 13 squeezes and contacts the Y2-axis rotating arm 9. At this time, the pedal 15 is radially fixed by the Y2-axis rotating arm 9, that is, it cannot rotate around the X-axis in space; the screw adjustment assembly is used to realize the movement of the pedal 15 in the XZ plane, and the two ends of the screw adjustment assembly correspond to the active connection between the Y2-axis rotating arm 9 and the Y2-axis rotating seat 8; the screw adjustment assembly is located at one end of the Y2-axis rotating seat 8 as the power output end, and one side of the Y2-axis rotating arm 9 serves as the driven end. The movement of the screw adjustment assembly drives the Y2-axis rotating arm 9 to rotate.

[0020] The screw adjustment assembly in this embodiment includes a Y2-axis screw rod 10 and a nut 16, and the Y2-axis screw rod 10 and the nut 16 are combined into a screw pair, wherein the nut 16 is threadedly assembled with the Y2-axis screw rod 10, and both ends of the Y2-axis screw rod 10 are rotatably installed in the installation groove of the Y2-axis rotating seat 8, and one end of the Y2-axis screw rod 10 passing through the Y2-axis rotating seat 8 is provided with a knob disk, which is convenient for rotating the Y2-axis screw rod 10, and a connecting rod 17 is provided between the nut 16 and the Y2-axis rotating arm 9, and one end of the connecting rod 17 is hinged to the nut 16, and the other end is hinged to the Y2-axis rotating arm 9. When in use, as the Y2-axis screw rod 10 rotates, the nut 16 is constrained by the connecting rod 17 and cannot rotate, so the nut 16 switches its position along the length direction of the Y2-axis screw rod 10 to realize the angle adjustment between the pedal 15 and the Y2-axis screw 10, and when the connecting rod 17 and the Y2-axis screw 10 are vertical, the maximum angle between the pedal 15 and the Y2-axis screw 10 is reached; the adjustment accuracy is high. The pedal 15 moves in the XZ plane.

[0021] As attached Figure 1As shown, in this embodiment, the second movable component includes a Z-axis locking bracket 2 and a Z-axis hinge shaft 3, wherein the Z-axis locking bracket 2 is fixedly welded on the connecting frame 1, and the Z-axis hinge shaft 3 is sleeved in the mounting cavity of the Z-axis locking bracket 2, and the Z-axis locking bracket 2 is provided with mounting rings at the top and bottom, and the Z-axis hinge shaft 3 is rotatably installed between the two mounting rings, and a Z-axis locking bolt 5 is threadedly installed on the mounting ring. When the Z-axis locking bolt 5 rotates and contacts the Z-axis hinge shaft 3, the Z-axis hinge shaft 3 is fixed, and a Z-axis rotating arm 4 is also welded on the Z-axis hinge shaft 3, and the Y2-axis rotating seat 8 is connected to the Z-axis rotating arm 4; when in use, the Z-axis rotating arm 4 is rotated around the Z-axis in space, so that the pedal 15 rotates around the Z-axis.

[0022] As attached Figure 3 As shown, in a further embodiment, a Y1-axis angle adjuster 7 is further provided between the Y2-axis rotating seat 8 and the Z-axis hinge shaft 3; The Y1-axis angle adjuster 7 includes a fixed part and a movable part that are rotatably connected. During production, the fixed part can be fixed to the Z-axis rotating arm 4 by bolts, and the movable part can be welded and fixed to the Y2-axis rotating seat 8. The Z-axis rotating arm 4 is equipped with a Y1-axis knob 6, and the Y1-axis knob 6 is connected to the driving part of the Y1-axis angle adjuster 7. When in use, the Y1-axis knob 6 is rotated to make the movable part drive the Y2-axis rotating seat 8 to rotate around the Y-axis to move closer to or away from the connecting frame 1; if necessary, a protective edge can be provided on the side of the pedal 15 close to the connecting frame 1 to limit the position of the patient's heel and the adjustment parts in the surface contact structure. At the same time, a non-slip foot pad can also be provided on the surface of the pedal 15 to increase the friction when the foot contacts.

[0023] In another embodiment, a wheelchair is provided, which is equipped with the multi-dimensionally adjustable wheelchair foot pedal structure in the above embodiment. Two pedal assemblies are provided in the wheelchair, and are symmetrically installed on both sides of the connecting frame. Figure 4 .

[0024] Specific use; First, the pedal 15 can rotate around the Z-axis in the space by following the Z-axis hinge shaft 3, and the Y2-axis screw 10 is rotated to drive the nut 16 to move in the length direction of the Y2-axis screw 10. The movement of the connecting rod 17 allows the pedal 15 to rotate around the Y-axis in the space. Finally, by swinging the pedal 15 and using the X-axis locking screw 12 to fix the adjusted pedal 15, it can be understood that the pedal 15 rotates around the X-axis in the space. In addition, the Y1-axis angle adjuster 7 provided in the structure has a strong maneuverability of the pedal 15 structure, which is beneficial to the support of the feet of DMD patients, so that the pedal 15 can be folded toward the connecting frame 1, which greatly reduces the volume of the mechanism and is convenient for storage and transportation.

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 application. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0026] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected 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 this application can be understood by specific circumstances.

Claims

1. A multi-dimensionally adjustable wheelchair footrest structure, characterized in that: Includes a pedal assembly and a connecting frame; The pedal assembly includes a pedal and a Y2-axis rotating seat, the pedal is connected to the Y2-axis rotating seat via a first movable assembly, and the pedal has a combined degree of freedom of motion in an XZ plane and a YZ plane; The Y2-axis rotating seat is movably connected to the connecting frame via a second movable component. The Y2-axis rotating seat rotates axially around the second movable component and has a degree of freedom of movement in an XY plane.

2. The multi-dimensionally adjustable wheelchair footrest structure according to claim 1, characterized in that: The first movable assembly includes a Y2-axis rotating arm and a screw adjustment assembly; One end of the Y2-axis rotating arm is hinged to the Y2-axis rotating seat; the pedal is movably connected to the Y2-axis rotating arm through the X-axis locking bracket and the X-axis bracket to achieve the movement of the pedal in the ZY plane, and the two ends of the screw adjustment assembly are correspondingly movably connected to the Y2-axis rotating arm and the Y2-axis rotating seat; the screw adjustment assembly works to drive the Y2-axis rotating arm to rotate.

3. The multi-dimensionally adjustable wheelchair footrest structure according to claim 2, characterized in that: The screw adjustment assembly includes a Y2-axis screw and a nut, the nut is threadedly assembled with the Y2-axis screw, both ends of the Y2-axis screw are rotatably installed in the mounting groove of the Y2-axis rotating seat, a connecting rod is provided between the nut and the Y2-axis rotating arm, one end of the connecting rod is hinged to the nut, and the other end is hinged to the Y2-axis rotating arm, the Y2-axis screw rotates to switch the nut adjustment position, thereby realizing the movement of the Y2-axis rotating arm in the XZ plane.

4. The multi-dimensionally adjustable wheelchair footrest structure according to claim 2, characterized in that: An X-axis locking screw is provided on one side of the pedal, and the X-axis locking screw is rotatably connected to the pedal and cooperated to connect to the X-axis locking bracket; the X-axis locking screw is rotated to fix the X-axis locking bracket to the Y2-axis rotating arm.

5. The multi-dimensionally adjustable wheelchair footrest structure according to claim 1, characterized in that: The second movable component includes a Z-axis locking bracket and a Z-axis hinge shaft, the Z-axis locking bracket is fixedly connected to the connecting frame, the Z-axis hinge shaft is sleeved in the installation cavity of the Z-axis locking bracket, and the Y2-axis rotating seat is connected to the Z-axis hinge shaft through a Z-axis rotating arm.

6. The multi-dimensionally adjustable wheelchair footrest structure according to claim 5, characterized in that: A Y1-axis angle adjuster is also provided between the Y2-axis rotating seat and the Z-axis hinge shaft; The Y1-axis angle adjuster includes a fixed part and a movable part that are rotatably connected. The fixed part is fixed to the Z-axis rotating arm, and the movable part is fixed to the Y2-axis rotating seat. A Y1-axis knob is installed on the Z-axis rotating arm, and the Y1-axis knob is connected to the drive part of the Y1-axis angle adjuster.

7. The multi-dimensionally adjustable wheelchair footrest structure according to claim 1, characterized in that: A protective edge is provided on one side of the pedal close to the connecting frame.

8. The multi-dimensionally adjustable wheelchair footrest structure according to claim 1, characterized in that: There are two pedal assemblies, and the two pedal assemblies are symmetrically arranged on both sides of the connecting frame.

9. A wheelchair, characterized in that: The invention comprises the multi-dimensionally adjustable wheelchair footrest structure as described in any one of claims 1 to 8.

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