Wheelchair armrest locking structure

Abstract

The utility model discloses a wheelchair armrest locking structure which comprises a positioning plate arranged on the side portion of a backrest, the positioning plate is provided with a horizontally-arranged stand column, a positioning seat is fixed to the tail end of an armrest, a through hole for the stand column to penetrate through is formed in the positioning seat, a cap for limiting the positioning seat is arranged on the stand column, and the positioning seat is provided with a through hole for the stand column to penetrate through. A supporting block used for supporting the bottom of the handrail in the horizontal state is further arranged at the bottom of the positioning plate, the positioning base rotates along the stand column, and a fixing structure used for fixing the positioning base is arranged at the outer end of the stand column. After the handrail locking device is turned over, the rotating block can be manually rotated, the abutting block on the rotating block abuts against the outer wall of the positioning seat, the rotated handrail is locked, and the handrail locking device has the advantages of being simple in structure and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field related to wheelchairs, in particular to a wheelchair armrest locking structure. Background Art

[0002] Currently, wheelchair armrests or armrests are typically 22.5 to 25 cm higher than the seat surface. Some armrests are height-adjustable. A lapboard can also be placed on the armrest for reading or dining. For convenience, some existing wheelchairs have reversible armrests. However, after reversing, the armrests need to be locked. The existing locking mechanism is complex and inconvenient to operate manually. Utility Model Content

[0003] In order to solve the defects in the prior art that the armrest needs to be locked after being flipped, and the existing locking mechanism is complicated and inconvenient to operate manually, the utility model provides a wheelchair armrest locking structure.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0005] The utility model discloses a wheelchair armrest locking structure, comprising a positioning plate arranged on the side of the backrest, the positioning plate is provided with a horizontally arranged column, a positioning seat is fixed at the end of the armrest, and the positioning seat is provided with a through hole for the column to pass through, and the column is provided with a limiting cap for the positioning seat, and the bottom of the positioning plate is also provided with a supporting block for supporting the bottom of the armrest in a horizontal state, and the positioning seat rotates along the column, and the outer end of the column is provided with a fixing structure for fixing the positioning seat.

[0006] As an optimal technical solution of the present invention, the fixing structure includes a threaded column at the outer end of the limiting cap, a rotating block is screwed into the threaded column, and the inner end surface of the rotating block is provided with a resistance block that resists the outer wall of the positioning seat, and the outside of the threaded column is provided with an anti-falling block to prevent the rotating block from falling off.

[0007] As an optimal technical solution of the present invention, the limiting cap is fixed on the threaded column through a retaining mechanism, and the retaining mechanism includes a plurality of threaded holes arranged at the end of the column, and the limiting cap is provided with through holes corresponding one to one to the threaded holes, and positioning bolts are installed between the through holes and the threaded holes.

[0008] As a preferred technical solution of the present invention, anti-wear rubber layers are provided on both sides of the positioning seat.

[0009] As a preferred technical solution of the present invention, reinforcing ribs are provided between the support block and the positioning plate.

[0010] As a preferred technical solution of the present invention, a limiting block is provided on the positioning plate for limiting the vertical state of the armrest after it is flipped over.

[0011] The beneficial effects of the utility model are:

[0012] 1. The wheelchair armrest locking structure has a positioning seat at the end of the armrest that can be flipped along the column, so that the armrest can be flipped. After flipping, the rotating block can be manually rotated, and the interference block on the rotating block will interfere with the outer wall of the positioning seat, so that the rotated armrest is locked. It has the characteristics of simple structure and easy operation. In addition, a supporting block for supporting the bottom of the armrest in a horizontal state is provided through the bottom of the positioning plate, which increases the load-bearing capacity of the armrest and prevents it from flipping downward.

[0013] This wheelchair armrest locking structure has a limit cap fixed to the threaded column through a retaining mechanism, wherein the limit cap is placed on the positioning seat and falls off the column, which is effectively avoided by fixing it with multiple positioning bolts. When the positioning seat rotates, the limit cap will not be driven to rotate, thereby increasing the overall stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a structural diagram of a wheelchair armrest locking structure of the utility model;

[0016] Figure 2 This is a structural diagram of a fixing structure of a wheelchair armrest locking structure of the utility model;

[0017] Figure 3 The utility model is a schematic diagram of the installation of a limit cap of a wheelchair armrest locking structure.

[0018] In the figure: 1. Positioning plate; 2. Post; 3. Positioning seat; 4. Through hole; 5. Limiting cap; 6. Handrail; 7. Support block; 8. Fixed structure; 10. Threaded column; 11. Rotating block; 12. Interference block; 13. Anti-slip block; 14. Threaded hole; 15. Through hole; 16. Positioning bolt; 17. Limiting block. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0020] Example: Figure 1-3As shown, the utility model provides a wheelchair armrest locking structure, comprising a positioning plate 1 arranged on the side of the backrest, the positioning plate 1 is provided with a horizontally arranged column 2, a positioning seat 3 is fixed at the end of the armrest 6, and the positioning seat 3 is provided with a through hole 4 for the column 2 to pass through, and the column 2 is provided with a limiting cap 5 for the positioning seat, and the bottom of the positioning plate 1 is also provided with a supporting block 7 for supporting the bottom of the armrest 6 in a horizontal state, and the positioning seat 3 rotates along the column 2, and the outer end of the column 2 is provided with a fixing structure 8 for fixing the positioning seat 3. The positioning seat 3 at the end of the armrest 6 can be flipped along the column 2, so that the armrest 6 can be flipped. After flipping, the rotating block can be manually rotated, and the interference block on the rotating block will interfere with the outer wall of the positioning seat, so that the rotated armrest is locked. It has the characteristics of simple structure and easy operation. A supporting block 7 for supporting the bottom of the armrest 6 in a horizontal state is also provided at the bottom of the positioning plate 1, which increases the load-bearing capacity of the armrest and will not flip downward.

[0021] The fixing structure 8 includes a threaded column 10 at the outer end of the limiting cap 5, a rotating block 11 is screwed into the threaded column 10, and the inner end surface of the rotating block 11 is provided with a resistance block 12 for resisting the outer wall of the positioning seat 3, and the outer side of the threaded column 10 is provided with an anti-slip block 13 for preventing the rotating block 11 from falling off;

[0022] The limiting cap 5 is fixed to the threaded column 10 via a retaining mechanism, and the retaining mechanism includes a plurality of threaded holes 14 provided at the end of the column 2. The limiting cap 5 is provided with through-holes 15 corresponding one-to-one with the threaded holes 14, and a positioning bolt 16 is installed between the through-holes 15 and the threaded holes 14. When the limiting cap 5 is fixed to the threaded column 10 via the retaining mechanism, the limiting cap placement positioning seat falls off the column, and the fixing by the plurality of positioning bolts effectively avoids this. When the positioning seat rotates, the limiting cap will not be driven to rotate, thereby increasing the overall stability.

[0023] The two sides of the positioning seat 3 are provided with anti-wear rubber layers to play an anti-wear role. Reinforcement ribs are provided between the support block 7 and the positioning plate 1 to increase the connection strength between the support block and the positioning plate.

[0024] The positioning plate 1 is provided with a limiting block 17 for limiting the vertical state of the armrest 6 after it is flipped, so that it is convenient to flip and limit the armrest when it is not needed.

[0025] Working principle: The utility model can flip the positioning seat 3 at the end of the armrest 6 along the column 2, so that the armrest 6 can be flipped. After flipping, the rotating block can be manually rotated, and the interference block on the rotating block will interfere with the outer wall of the positioning seat, so that the rotated armrest is locked. It has the characteristics of simple structure and easy operation. A supporting block 7 for supporting the bottom of the armrest 6 in a horizontal state is also provided at the bottom of the positioning plate 1, which increases the load-bearing capacity of the armrest and will not flip downward.

[0026] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A wheelchair armrest locking structure, characterized in that: The invention comprises a positioning plate (1) arranged on the side of the backrest, wherein the positioning plate (1) is provided with a horizontally arranged column (2), a positioning seat (3) is fixed at the end of the armrest (6), and the positioning seat (3) is provided with a through hole (4) for the column (2) to pass through, and the column (2) is provided with a limiting cap (5) for limiting the positioning seat, and the bottom of the positioning plate (1) is also provided with a supporting block (7) for supporting the bottom of the armrest (6) in a horizontal state, and the positioning seat (3) rotates along the column (2), and the outer end of the column (2) is provided with a fixing structure (8) for fixing the positioning seat (3).

2. A wheelchair armrest locking structure according to claim 1, characterized in that: The fixing structure (8) comprises a threaded column (10) at the outer end of the limiting cap (5), a rotating block (11) being screwed into the threaded column (10), and a resisting block (12) for resisting the outer wall of the positioning seat (3) is provided on the inner end surface of the rotating block (11), and an anti-slipping block (13) for preventing the rotating block (11) from slipping out is provided on the outside of the threaded column (10).

3. The wheelchair armrest locking structure according to claim 1, characterized in that: The limiting cap (5) is fixed on the threaded column (10) via a retaining mechanism, and the retaining mechanism includes a plurality of threaded holes (14) provided at the end of the column (2), and the limiting cap (5) is provided with through holes (15) corresponding to the threaded holes (14) one by one, and positioning bolts (16) are installed between the through holes (15) and the threaded holes (14).

4. The wheelchair armrest locking structure according to claim 1, characterized in that: Anti-wear rubber layers are provided on both sides of the positioning seat (3).

5. The wheelchair armrest locking structure according to claim 1, characterized in that: Reinforcing ribs are provided between the support block (7) and the positioning plate (1).

6. The wheelchair armrest locking structure according to claim 3, characterized in that: The positioning plate (1) is provided with a limiting block (17) for limiting the vertical position of the armrest (6) after it is flipped over.

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