Wheelchair armrest components

Abstract

The wheelchair armrest assembly provided by the present invention comprises an armrest seat, an armrest and a locking mechanism, wherein the armrest seat is located on one side or both sides of the wheelchair seat, and the armrest comprises an armrest board and a connecting piece connected to the armrest board. By making the connecting piece slidably arranged in a mounting hole on the armrest seat, and then arranging a locking mechanism to lock the relative position of the connecting piece and the armrest seat, the height adjustment of the armrest board can be achieved, so that the comfort of the occupant is better; by adopting a unidirectional locking locking mechanism, when the locking mechanism is in a locked state, the connecting piece can slide unidirectionally relative to the armrest seat, and when the locking mechanism is in an unlocked state, the connecting piece can slide bidirectionally relative to the armrest seat, when adjusting the height of the armrest board, the operation is more convenient, and the function of adjusting the height of the armrest board when the locking mechanism is in a locked state is provided, and the sense of luxury is stronger.

Description

Technical Field

[0001] The invention relates to the field of rehabilitation equipment, and in particular to a wheelchair armrest assembly. Background Art

[0002] During the treatment and rehabilitation process of patients, especially for those who cannot walk independently, wheelchairs are usually used instead of walking. This enables patients to receive better treatment and rehabilitation and facilitates their daily lives.

[0003] Most existing wheelchairs use fixed armrests. When patients of different heights or arm lengths sit in them, there is a mismatch between the elbow height and the armrest height due to the different elbow heights, resulting in poor comfort. Adjustments need to be made by raising the armrest surface or the seat, which is inconvenient to operate. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a wheelchair armrest assembly which is easy to operate and can adjust the armrest height.

[0005] To achieve the above object, the technical solution provided by the present invention is that a wheelchair armrest assembly comprises:

[0006] An armrest seat, wherein the armrest seat is located on one side or both sides of the wheelchair seat;

[0007] An armrest, the armrest comprising an armrest plate extending forward and backward in a horizontal direction and a connecting piece connected to the armrest plate, the connecting piece being slidably inserted into a mounting hole on the armrest seat;

[0008] A locking mechanism, the locking mechanism being used to lock the relative position of the connecting member and the armrest seat;

[0009] The locking mechanism is a one-way locking mechanism. When the locking mechanism is in a locked state, the connecting member can slide one-way relative to the armrest seat. The one-way sliding means that the connecting member can slide in a direction deeper into the mounting hole and the connecting member cannot slide in a direction away from the mounting hole, or the connecting member can slide in a direction away from the mounting hole and the connecting member cannot slide in a direction deeper into the mounting hole. When the locking mechanism is in an unlocked state, the connecting member can slide bidirectionally relative to the armrest seat. The bidirectional sliding means that the connecting member can slide both in a direction deeper into the mounting hole and in a direction away from the mounting hole.

[0010] Preferably, the locking mechanism includes a locking piece slidably arranged on the armrest seat and a locking groove opened on the outer wall of the connecting piece, the locking piece has a first working position and a second working position, when the locking piece is in the first working position, the end of the locking piece close to the connecting piece extends into the mounting hole and is inserted into the locking groove, so that the locking mechanism is locked, and when the locking piece is in the second working position, the locking piece disengages from the locking groove, so that the locking mechanism is unlocked.

[0011] Further preferably, there are at least two locking grooves, and the two locking grooves are arranged at intervals along the extension direction of the connecting member.

[0012] Further preferably, the locking mechanism further comprises an elastic member, and the elastic member has a tendency to drive the locking member to slide toward the first working position.

[0013] Further preferably, the end of the locking member close to the connecting member has a first inclined surface, the angle between the first inclined surface and the sliding direction of the locking member is an acute angle, and the first inclined surface is used to achieve one-way locking of the locking mechanism.

[0014] Further preferably, a second inclined surface is provided on the inner wall of the locking groove, and the angle between the second inclined surface and the sliding direction of the connecting member is an acute angle, and the second inclined surface is used to achieve one-way locking of the locking mechanism.

[0015] Further preferably, the sliding direction of the locking member is parallel to the horizontal plane.

[0016] Preferably, the upper end of the connecting member is connected to the bottom of the armrest plate, and the lower end of the connecting member extends obliquely downward and rearward.

[0017] Further preferably, the angle between the extending direction of the connecting member and the horizontal direction is 50-70°.

[0018] Further preferably, the connecting member is a flat member, the connecting member is connected to the outer side of the bottom of the armrest board, and the plane where the connecting member is located is parallel to the extension direction of the armrest board.

[0019] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0020] The wheelchair armrest assembly provided by the present invention comprises an armrest seat, an armrest and a locking mechanism, wherein the armrest seat is located on one side or both sides of the wheelchair seat, and the armrest comprises an armrest board and a connecting piece connected to the armrest board. By making the connecting piece slidably arranged in a mounting hole on the armrest seat, and then arranging a locking mechanism to lock the relative position of the connecting piece and the armrest seat, the height adjustment of the armrest board can be achieved, so that the comfort of the occupant is better; by adopting a unidirectional locking locking mechanism, when the locking mechanism is in a locked state, the connecting piece can slide unidirectionally relative to the armrest seat, and when the locking mechanism is in an unlocked state, the connecting piece can slide bidirectionally relative to the armrest seat, when adjusting the height of the armrest board, the operation is more convenient, and the function of adjusting the height of the armrest board when the locking mechanism is in a locked state is provided, and the sense of luxury is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic front view of a preferred embodiment of the present invention, with a partial cross-section, at which time the locking mechanism is in a locked state.

[0022] Figure 2 yes Figure 1 Schematic cross-sectional view along the AA direction.

[0023] Figure 3 yes Figure 1 A local enlarged schematic diagram of point B in the middle.

[0024] in:

[0025] 10. Armrest seat; 11. Mounting hole; 12. Mounting slot; 20. Armrest; 21. Armrest plate; 22. Connecting piece; 30. Locking mechanism; 31. Locking piece; 311. End; 312. First slope; 313. Tip; 32. Locking slot; 321. Second slope; 322. Connecting slot; 33. Elastic piece. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0027] The front and rear directions described in the present invention refer to Figure 1 The left and right directions in the present invention refer to the up and down directions. Figure 1 The up and down directions in .

[0028] like Figure 1-3As shown, the wheelchair armrest assembly provided by the present invention comprises: an armrest seat 10, an armrest 20 and a locking mechanism 30, wherein the armrest seat 10 is located on both sides of the wheelchair seat. Of course, under special circumstances, the armrest seat 10 can also be arranged on only one side of the wheelchair seat. The armrest seat 10 is in the shape of a pistol, and the armrest seat 10 has a horizontal extension portion and an inclined extension portion; the armrest 20 comprises an armrest plate 21 extending forward and backward in the horizontal direction and a connecting member 22 connected to the armrest plate 21, the armrest plate 21 is used to support the user's elbow, the upper end of the connecting member 22 is connected to the bottom of the armrest plate 21, the connecting member 22 is a flat member, the connecting member 22 is connected to the outer side of the bottom of the armrest plate 21, the plane where the connecting member 22 is located is parallel to the extension direction of the armrest plate 21, which can improve the comfort of the user, the lower end of the connecting member 22 extends downward and backward obliquely, and the angle between the extension direction of the connecting member 22 and the horizontal direction is 50-70°, In this embodiment, the angle is 63°, and the connecting member 22 can be slidably inserted into the mounting hole 11 on the armrest seat 10; the locking mechanism 30 is used to lock the relative position of the connecting member 22 and the armrest seat 10, and the locking mechanism 30 is a one-way locking mechanism, and the one-way locking means that when the locking mechanism 30 is in a locked state, the connecting member 22 can slide one-way relative to the armrest seat 10, and the one-way sliding means that the connecting member 22 can slide in a direction away from the mounting hole 11 and the connecting member 22 cannot slide in a direction deep into the mounting hole 11. In other embodiments, the one-way sliding means that the connecting member 22 can slide in a direction deep into the mounting hole 11 and the connecting member 22 cannot slide in a direction away from the mounting hole 11; when the locking mechanism 30 is in an unlocked state, the connecting member 22 can slide in both directions relative to the armrest seat 10, and the two-way sliding means that the connecting member 22 can slide both in a direction deep into the mounting hole 11 and in a direction away from the mounting hole 11.

[0029] In this embodiment, the locking mechanism 30 includes a locking piece 31, a locking groove 32 provided on the outer wall of the connecting piece 22, and an elastic piece 33. Specifically, a mounting groove 12 extending horizontally forward is provided on the inner wall of the mounting hole 11. The locking piece 31 is slidably arranged in the mounting groove 12. The sliding direction of the locking piece 31 is parallel to the horizontal plane. A push handle portion for driving the locking piece 31 to slide is connected to the locking piece 31. The push handle portion is located on the lower surface of the horizontally extending portion of the armrest seat 10. The locking piece 31 has a first working position and a second working position. When the locking piece 31 is in the first working position, the end 311 of the locking piece 31 close to the connecting piece 22 extends from the notch of the mounting groove 12 into the mounting hole 11 and is inserted into the locking groove 32. The locking mechanism 30 is locked. When the locking piece 31 is in the second working position, the end 311 of the locking piece 31 is disengaged from the locking groove 32, so that the locking mechanism 30 is unlocked. In the present embodiment, there are two locking grooves 32, and the two locking grooves 32 are arranged at intervals along the extension direction of the connecting piece 22. In other embodiments, in order to further subdivide the height of the armrest adjusted at a single time, there are three or more locking grooves 32. The elastic piece 33 has a tendency to drive the locking piece 31 to slide toward the first working position. Specifically, the elastic piece 33 is a spring. The elastic piece 33 is located in the mounting groove 12. One end of the elastic piece 33 is pressed against the bottom wall of the mounting groove 12, and the other end is pressed against the end of the locking piece 31 away from the connecting piece 22.

[0030] In this embodiment, a connecting groove 322 is provided between the two locking grooves 32, and the connecting groove 322 passes through the two locking grooves 32, and the connecting groove 322 extends along the sliding direction of the connecting member 22. When the locking member 31 is in the second working position, the end 311 of the locking member 31 retracts into the mounting groove 12, but the tip 313 of the end 311 remains in the mounting hole 11, and the tip 313 protrudes from the inner wall of the mounting hole 11. When the connecting member 22 slides relative to the armrest seat 10, the tip 313 contacts the bottom of the connecting groove 322, and the connecting groove 322 is used to avoid the tip 313. The tip 313 is used to limit the maximum distance of the two-way sliding of the connecting member 22, so as to prevent the connecting member 22 from detaching from the mounting hole 11 and preventing the connecting member 22 from damaging the bottom of the mounting hole 11.

[0031] To realize the one-way locking function of the locking mechanism 30, in the present embodiment, the end 311 of the locking member 31 close to the connecting member 22 has a first inclined surface 312, and the angle between the first inclined surface 312 and the sliding direction of the locking member 31 is an acute angle; a second inclined surface 321 is provided on the inner wall of the locking groove 32, and the angle between the second inclined surface 321 and the sliding direction of the connecting member 22 is an acute angle, and the second inclined surface 321 is parallel to the first inclined surface 312; when the locking mechanism 30 is in a locked state, the first inclined surface 312 fits the second inclined surface 321, and when the connecting member 22 slides unidirectionally relative to the armrest seat 10, the connecting member 22 drives the second inclined surface 321 to move through the first inclined surface 312, so that the locking member 31 is changed to the second working position, so that the locking mechanism 30 is unlocked.

[0032] In other embodiments, only the first bevel 312 or the second bevel 321 may be provided. When the locking mechanism 30 is in the locked state, the first bevel 312 is in contact with the groove edge of the locking groove 32 or the second bevel 321 is in contact with the end edge of the locking member 31, which can also achieve the above-mentioned function.

[0033] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0034] The wheelchair armrest assembly provided by the present invention can adjust the height of the armrest board by making the connecting piece slidably arranged in the mounting hole on the armrest seat, and then lock the relative position of the connecting piece and the armrest seat by setting a locking mechanism, so as to improve the comfort of the occupant; by adopting a one-way locking locking mechanism, the operation is more convenient when adjusting the height of the armrest board, and the locking mechanism has the function of adjusting the height of the armrest board when the locking mechanism is in a locked state, which makes the sense of luxury stronger; the locking mechanism of the wheelchair armrest assembly is ingenious in conception and simple in structure, and is easy to promote and use; because the angle between the extension direction of the connecting piece and the horizontal direction is 63°, when the connecting piece slides relative to the armrest seat, the position of the armrest board in the front and rear directions will change, which can better match users of different heights.

[0035] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. Wheelchair armrest assembly, including: An armrest seat, wherein the armrest seat is located on one side or both sides of the wheelchair seat; An armrest, the armrest comprising an armrest plate extending forward and backward in a horizontal direction and a connecting piece connected to the armrest plate, the connecting piece being slidably inserted into a mounting hole on the armrest seat; A locking mechanism, the locking mechanism is used to lock the relative position of the connecting member and the armrest seat, the locking mechanism is a one-way locking mechanism, when the locking mechanism is in a locked state, the connecting member can slide one-way relative to the armrest seat, the one-way sliding means that the connecting member can slide in a direction to penetrate into the mounting hole and the connecting member cannot slide in a direction to escape from the mounting hole, or the connecting member can slide in a direction to escape from the mounting hole and the connecting member cannot slide in a direction to penetrate into the mounting hole; when the locking mechanism is in an unlocked state, the connecting member can slide in both directions relative to the armrest seat, the two-way sliding means that the connecting member can slide both in a direction to penetrate into the mounting hole and in a direction to escape from the mounting hole Sliding; the locking mechanism comprises a locking piece slidably arranged on the armrest seat, a locking groove opened on the outer wall of the connecting piece, and an elastic piece, the sliding direction of the locking piece is parallel to the horizontal plane, the locking piece has a first working position and a second working position, when the locking piece is in the first working position, the end of the locking piece close to the connecting piece extends into the mounting hole and is inserted into the locking groove, so that the locking mechanism is locked, when the locking piece is in the second working position, the locking piece is disengaged from the locking groove, so that the locking mechanism is unlocked, there are two locking grooves, the two locking grooves are arranged at intervals along the extension direction of the connecting piece, and the elastic piece has a tendency to drive the locking piece to slide toward the first working position; The locking member has a first inclined surface at an end portion close to the connecting member, and the angle between the first inclined surface and the sliding direction of the locking member is an acute angle. A second inclined surface is provided on the inner wall of the locking groove, and the angle between the second inclined surface and the sliding direction of the connecting member is an acute angle. The second inclined surface is parallel to the first inclined surface. When the locking mechanism is in a locked state, the first inclined surface is in contact with the second inclined surface. When the connecting member slides unidirectionally relative to the armrest seat, the connecting member drives the second inclined surface to move through the first inclined surface, so that the locking member is changed to a second working position, so that the locking mechanism is unlocked. Features: A connecting groove is provided between the two locking grooves, the connecting groove passes through the two locking grooves, and the connecting groove extends along the sliding direction of the connecting member. When the locking member is in the second working position, the end of the locking member retracts into the mounting groove, but the tip of the end remains in the mounting hole, and the tip protrudes from the inner wall of the mounting hole. When the connecting member slides relative to the armrest seat, the tip contacts the bottom of the connecting groove. The upper end of the connecting piece is connected to the bottom of the armrest board, and the lower end of the connecting piece extends downward and backward at an angle. The angle between the extension direction of the connecting piece and the horizontal direction is 50-70°. The connecting piece is a flat component, and the connecting piece is connected to the outer side of the bottom of the armrest board. The plane where the connecting piece is located is parallel to the extension direction of the armrest board.

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