An adjustable armrest for a seat

Abstract

An adjustable seat armrest is used to solve the technical problem that the armrest of the prior art seat mentioned in the background art can only change the vertical height position and cannot change the angle according to the needs of the user, thereby reducing the riding experience of the user, comprising a support plate fixed to the side wall of the seat, the support plate is provided with a mounting plate, the two side walls of the support plate close to each other are both fixed with a plurality of fixed blocks, the mounting plate is provided with two abutting blocks which are in sliding connection with the mounting plate, and the two abutting blocks are in abutment with one of the fixed blocks on the support plate, the mounting plate is provided with a moving assembly for moving the abutting blocks, the mounting plate is provided with a fixed rod away from the support plate, the fixed rod is provided with a rotating ring in rotating connection with the outer circle of the fixed rod, the rotating ring is provided with a first armrest plate on one side, the fixed rod is provided with a first rotating assembly for adjusting the rotating angle of the first armrest plate, the first armrest plate is provided with a second armrest plate in rotating connection with the first armrest plate, and the first armrest plate is provided with a second rotating assembly for adjusting the rotating angle of the second armrest plate.

Description

Technical Field

[0001] This utility model relates to the field of seating technology, specifically to an adjustable seat armrest. Background Technology

[0002] The armrests of office chairs are used to protect and support office workers, which can greatly improve their safety and comfort.

[0003] An existing technology, such as the invention patent document with authorization announcement number "CN216753978U" and patent name "An office chair with adjustable armrests", discloses a chair including an office chair and an armrest assembly. The armrest assembly is located on both sides of the office chair and includes an armrest tube, an armrest bar, and an armrest board. The armrest tube has a sliding groove inside, the armrest bar is movably installed in the sliding groove, the armrest board is located on the armrest bar, and a fixed compartment is movably installed below the sliding groove.

[0004] The handrails in the aforementioned patent documents can only change the vertical height position and cannot change the angle according to the user's needs, thereby reducing the user's riding experience. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by proposing an adjustable seat armrest, which solves the technical problem mentioned in the background art that the armrests of existing seats can only change the vertical height position and cannot change the angle according to the user's needs, thereby reducing the user's riding experience.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A support plate fixed to the side wall of the seat is included. A mounting plate is slidably mounted on the support plate. Several fixing blocks are fixed on the two adjacent side walls of the support plate. Two abutting blocks are slidably mounted on the mounting plate, and each abutting block abuts against one of the fixing blocks on the support plate. A moving component for moving the abutting blocks is provided inside the mounting plate. A fixing rod is provided on the side of the mounting plate away from the support plate. A rotating ring is rotatably mounted on the outer ring of the fixing rod. A first armrest plate is provided on one side of the rotating ring. A first rotating component for adjusting the rotation angle of the first armrest plate is provided on the fixing rod. A second armrest plate is rotatably mounted on the first armrest plate. A second rotating component for adjusting the rotation angle of the second armrest plate is provided on the first armrest plate.

[0007] Working principle:

[0008] The user operates the movable component within the mounting plate to move the two abutment blocks, disengaging them from the current fixed block. After unlocking, the mounting plate can slide along the support plate, thereby causing the fixed rod, rotating ring, and first handrail to rise and fall as a whole. When the second handrail reaches the target height, the movable component resets the abutment blocks, causing them to re-abut against the corresponding fixed block on the support plate, thus fixing the height. Once the height is fixed, the user can apply rotational force to the first handrail, causing it to rotate around the fixed rod, thereby adjusting its rotation angle. After adjustment, the angle is locked by the first rotating component. The user can then further adjust the rotation angle of the second handrail, which is rotatably connected to the first handrail. The second rotating component allows for angle adjustment and locking to accommodate different elbow support angle requirements.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] First, a movable component is provided, which can change the contact position between the abutment block and the fixed block, thereby changing the overall vertical height of the fixed rod, the first handrail plate and the second handrail plate.

[0011] Second, a first rotating component is provided, which can change the rotation angle of the first handrail plate around the axis of the fixed rod.

[0012] Third, a second rotating component is provided, which can change the rotation angle of the second handrail on the first handrail. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0014] Figure 2 for Figure 1 Enlarged cross-sectional view of point A in the middle;

[0015] Figure 3 for Figure 1 Enlarged cross-sectional view of section B;

[0016] Figure 4 for Figure 1 Enlarged cross-sectional view of section C;

[0017] Figure 5 This is a schematic diagram of the assembly structure of the first and second handrails.

[0018] Explanation of reference numerals in the attached drawings: 1. Support plate; 2. Mounting plate; 3. Fixing block; 4. Abutment block; 5. Fixing rod; 6. Rotating ring; 7. First handrail plate; 8. Second handrail plate; 9. Guide rod; 10. Moving block; 11. First spring; 12. Mounting cavity; 13. First retaining plate; 14. Pull rod; 15. Second retaining plate; 16. Second spring; 17. Sliding block; 18. Sliding groove; 19. Ball bearing; 20. Rotating column; 21. Sliding block; 22. Extrusion rod; 23. Third spring; 24. First limiting block; 25. Second limiting block; 26. Cavity; 27. Sliding groove; 28. Extrusion cavity. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] Example:

[0021] like Figure 1 and Figure 2 As shown, an adjustable seat armrest includes a support plate 1 fixed to the side wall of the seat. A mounting plate 2 is slidably mounted on the support plate 1. Several fixing blocks 3 are fixed to the two adjacent side walls of the support plate 1. Two abutting blocks 4 are slidably mounted on the mounting plate 2, and each abutting block 4 abuts against one of the fixing blocks 3 on the support plate 1. A moving assembly for moving the abutting blocks 4 is provided inside the mounting plate 2. The moving assembly includes two guide rods 9, two moving blocks 10, and two first springs 11. A mounting cavity 12 is formed inside the mounting plate 2. The two guide rods 9 are fixed inside the mounting cavity 12. The two moving blocks 10 are slidably mounted on the two guide rods 9, and the two abutting blocks 4 are fixed on the two moving blocks 10. The two first springs 11 are respectively sleeved on the two guide rods 9. The rod 9 is fixed at both ends to the inner wall of the mounting cavity 12 and the movable block 10, respectively. In its natural state, the elastic force of the two first springs 11 pushes the two movable blocks 10 to slide towards each other on the guide rod 9, thereby causing the two abutment blocks 4 fixed thereon to extend and closely abut against the fixed blocks 3 on both sides of the support plate 1, forming a self-locking mechanism that firmly locks the mounting plate 2 in its current position. When the height needs to be adjusted, the user needs to apply external force to press the movable block 10. The first spring 11 changes from its natural state to a compressed state, forcing the two abutment blocks 4 to move towards each other and disengage from the current fixed block 3. At this time, the mounting plate 2 can slide freely along the support plate 1. When it slides to the target height, the external force is removed, and the first spring 11 pushes the abutment blocks 4 to extend again and abut against the fixed block 3 at the target height, thus completing the height locking.

[0022] like Figure 1 and Figure 4As shown, the mounting plate 2 has a fixed rod 5 on the side away from the support plate 1. The outer ring of the fixed rod 5 is rotatably provided with a rotating ring 6. The outer ring of the fixed rod 5 is fixed with an annular slider 17. The inner ring of the rotating ring 6 is provided with an annular groove 18 adapted to the slider 17. Several balls 19 are rolled on the slider 17. The fixed rod 5 provides the core shaft for the entire rotating component. The annular slider 17 fixed on it cooperates with the annular groove 18 opened in the inner ring of the rotating ring 6 to connect the rotating ring 6 with the fixed rod 5 and enable the rotating ring 6 to rotate smoothly around the axis of the fixed rod 5. The several balls 19 provided in between convert sliding friction into rolling friction, reducing the resistance during rotation.

[0023] like Figure 1 and Figure 3 As shown, a first handrail plate 7 is provided on one side of the rotating ring 6. A first rotating assembly for adjusting the rotation angle of the first handrail plate 7 is provided on the fixed rod 5. The first rotating assembly includes a first retaining plate 13, a pull rod 14, a second retaining plate 15, and a second spring 16. The first retaining plate 13 is fixed to the end of the fixed rod 5 away from the mounting plate 2. The pull rod 14 slides through the first handrail plate 7 and extends toward the first retaining plate 13. The second retaining plate 15 is fixed to the end of the pull rod 14 and is located between the first retaining plate 13 and the pull rod 14. The end faces of the first retaining plate 13 and the second retaining plate 15 are ratchet structures and mesh with each other. The second spring 16 is sleeved on the pull rod 14. 4. The two ends of the second spring 16 are respectively fixed inside the second locking plate 15 and the first armrest plate 7. In the natural state, the elastic force of the second spring 16 pushes the second locking plate 15 to tightly engage with the first locking plate 13 fixed at the end of the first rod. The ratchet structure on the end face of both prevents reverse rotation, thereby locking the angle of the first armrest plate 7. When the angle needs to be adjusted, the user pulls the lever 14 outward to overcome the elastic force of the second spring 16, so that the second locking plate 15 is separated from the first locking plate 13, and the engagement lock is released. At this time, the first armrest plate 7 can drive the rotating ring 6 to rotate freely around the fixed rod 5. After rotating to the target angle, the lever 14 is released, and the second spring 16 pushes the second locking plate 15 to engage with the first locking plate 13 again, realizing the re-locking of the angle.

[0024] like Figure 1 and Figure 5As shown, a second handrail 8 is rotatably mounted on the first handrail 7. The first handrail 7 has a second rotating assembly for adjusting the rotation angle of the second handrail 8. The second rotating assembly includes a rotating column 20, an annular sliding block 21, a pressing rod 22, a third spring 23, several first limiting blocks 24, and two second limiting blocks 25. A circular cavity 26 is formed inside the first handrail 7. The rotating column 20 is rotatably mounted within the cavity 26. The sliding block 21 is fixed to the outer ring of the rotating column 20, and the two are coaxial. A sliding groove 27 is formed on the inner wall of the cavity 26, and the sliding block 21 slides within the sliding groove 27. A pressing cavity 28 is formed inside the rotating column 20. The pressing rod 22 slides within the pressing cavity 28. The third spring 23 is located within the pressing cavity 28, and its two ends are fixedly connected to the inner wall of the pressing cavity 28 and the end of the pressing rod 22, respectively. Several first limiting blocks 24 are evenly distributed in a ring and fixed within the cavity 26. Inside cavity 26, two second limiting blocks 25 are fixed to opposite ends of the pressing rod 22, and the second limiting blocks 25 are located between two adjacent first limiting blocks 24. In the natural state, the elastic force of the third spring 23 pushes the second limiting blocks 25 at both ends of the pressing rod 22 outward and into the groove formed by several uniformly distributed first limiting blocks 24, thereby achieving gear locking. When it is necessary to adjust the rotation angle, the user applies pressure to the pressing rod 22, the pressing rod 22 pushes the third spring 23, the third spring 23 changes from the natural state to the compressed state, forcing the second limiting blocks 25 on the pressing rod 22 to slide out from the two adjacent first limiting blocks 24. Then, the second armrest plate 8 is rotated. When the second armrest plate 8 is rotated to the target angle, the user releases the pressing rod 22, the second limiting blocks 25 are realigned between the two new first limiting blocks 24, and are locked again under the action of the third spring 23, completing gear switching and locking.

[0025] Working principle:

[0026] When the armrest height needs to be adjusted, the user applies external force to press the moving block 10, overcoming the elastic force of the first spring 11, causing the abutment block 4, which is fixed to the moving block 10, to move towards each other and disengage from the abutment block 3 on the side of the support plate 1, thus releasing the lock. Then, the mounting plate 2 can be pushed to slide along the support plate 1 to the desired height. After the external force is removed, the first spring 11 rebounds, causing the abutment block 4 to extend and re-abut against the fixed block 3 in the new position, thus completing the height locking.

[0027] When it is necessary to adjust the rotation angle of the first handrail 7, the user pulls the lever 14 in the first rotating assembly outward to overcome the elastic force of the second spring 16, so that the second locking plate 15, which is fixed to the lever 14, separates from the first locking plate 13, which is fixed to the end of the fixed rod 5, and releases the engagement lock of its ratchet structure. At this time, the first handrail 7 can rotate smoothly around the fixed rod 5 through the rotating ring 6. After rotating to the target angle, the lever 14 is released, and the second spring 16 pushes the second locking plate 15 to re-engage with the first locking plate 13.

[0028] When it is necessary to adjust the rotation angle of the second armrest plate 8, the user applies pressure to the squeezing rod 22 in the second rotating assembly to overcome the elastic force of the third spring 23, causing the second limiting blocks 25 fixed at both ends of the squeezing rod 22 to retract and slide out from between the first limiting blocks 24 distributed in a ring on the inner wall of the cavity 26. Then the second armrest plate 8 can be rotated, driving the rotating column 20 to rotate to the target angle. After the pressure is released, the third spring 23 rebounds and pushes the second limiting block 25 to extend and lock into the groove between a new pair of first limiting blocks 24, completing the multi-position locking of the rotation angle.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An adjustable seat armrest, characterized in that, The seat includes a support plate (1) fixed to the side wall of the seat, a mounting plate (2) slidably mounted on the support plate (1), several fixing blocks (3) fixed on the two side walls of the support plate (1) that are close to each other, two abutting blocks (4) slidably mounted on the mounting plate (2), and the two abutting blocks (4) abut against one of the fixing blocks (3) on the support plate (1) respectively, a moving component for moving the abutting blocks (4) is provided inside the mounting plate (2), a fixing rod (5) is provided on the side of the mounting plate (2) away from the support plate (1), a rotating ring (6) is rotatably mounted on the outer ring of the fixing rod (5), a first armrest plate (7) is provided on one side of the rotating ring (6), a first rotating component for adjusting the rotation angle of the first armrest plate (7) is provided on the fixing rod (5), a second armrest plate (8) is rotatably mounted on the first armrest plate (7), and a second rotating component for adjusting the rotation angle of the second armrest plate (8) is provided on the first armrest plate (7).

2. The adjustable armrest for a seat according to claim 1, characterized in that: The movable component includes two guide rods (9), two movable blocks (10), and two first springs (11). The mounting plate (2) has a mounting cavity (12). The two guide rods (9) are fixed in the mounting cavity (12). The two movable blocks (10) are slidably mounted on the two guide rods (9). The two abutting blocks (4) are fixed on the two movable blocks (10). The two first springs (11) are respectively sleeved on the two guide rods (9) and their two ends are fixedly connected to the inner wall of the mounting cavity (12) and the movable blocks (10) respectively.

3. An adjustable seat armrest according to claim 1, characterized in that: The first rotating assembly includes a first retaining plate (13), a pull rod (14), a second retaining plate (15), and a second spring (16). The first retaining plate (13) is fixed to the end of the fixed rod (5) away from the mounting plate (2). The pull rod (14) slides through the first handrail plate (7) and extends toward the first retaining plate (13). The second retaining plate (15) is fixed to the end of the pull rod (14) and is located between the first retaining plate (13) and the pull rod (14). The first retaining plate (13) and the second retaining plate (15) have ratchet structures on their close-to-each end faces and are engaged with each other. The second spring (16) is sleeved on the pull rod (14) and its two ends are fixed inside the second retaining plate (15) and the first handrail plate (7), respectively.

4. An adjustable seat armrest according to claim 3, characterized in that: The outer ring of the fixed rod (5) is fixed with an annular slider (17), and the inner ring of the rotating ring (6) is provided with an annular groove (18) adapted to the slider (17). Several balls (19) are rolled on the slider (17).

5. An adjustable seat armrest according to claim 1, characterized in that: The second rotating assembly includes a rotating column (20), an annular sliding block (21), a pressing rod (22), a third spring (23), several first limiting blocks (24), and two second limiting blocks (25). A circular cavity (26) is formed inside the first handrail plate (7). The rotating column (20) is rotatably disposed within the cavity (26). The sliding block (21) is fixed to the outer ring of the rotating column (20) and the two are coaxial. A sliding groove (27) is formed on the inner wall of the cavity (26), and the sliding block (21) slides within the sliding groove (27). The rotating column (20) has an extrusion chamber (28) inside. The extrusion rod (22) is slidably disposed in the extrusion chamber (28). The third spring (23) is disposed in the extrusion chamber (28) and its two ends are fixedly connected to the inner wall of the extrusion chamber (28) and the end of the extrusion rod (22) respectively. Several first limiting blocks (24) are evenly distributed in a ring and fixedly disposed in the inner wall of the cavity (26). Two second limiting blocks (25) are fixedly disposed at opposite ends of the extrusion rod (22) respectively, and the second limiting blocks (25) are located between two adjacent first limiting blocks (24).

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