A mechanism for adjusting the armrest of an office chair

Abstract

The utility model relates to the field of office chair handrail's, disclose a kind of office chair handrail's adjusting mechanism, including two L-shaped frames, two L-shaped frames are respectively fixed in the left and right sides of office chair body, the inner wall front side and rear side of L-shaped frame are all provided with several positioning slots, the inner wall of L-shaped frame is inserted with handrail body, the bottom surface of handrail body is provided with T-shaped hole, the inner wall left and right sides of T-shaped hole are all provided with through-hole, the inner wall of through-hole is inserted with positioning column, the positioning column is inserted in positioning slot, the outer wall of positioning column is wound with spring, one end of spring is connected with the inner wall of through-hole, the other end of spring is connected with the outer wall of positioning column.In the utility model, through the synergies of positioning column, spring, notch, work-shaped frame and tension spring, the quick positioning and dynamic adjustment of handrail body can be realized, so that the user can flexibly adjust the height of handrail body according to the needs, and the labor cost is saved.

Description

Technical Field

[0001] This utility model relates to the technical field of office chair armrests, specifically to an adjustment mechanism for office chair armrests. Background Technology

[0002] Office chairs refer to various chairs provided for convenience in daily work and social activities. Among existing office chairs, the height adjustment of the armrests is an important factor affecting user comfort. If users cannot adjust the armrest height according to their own needs, their arms may not be effectively supported, which will affect work comfort and health.

[0003] Chinese patent CN222129767U discloses an office chair with adjustable armrests, including chair legs placed on the ground, a seat fixed to the side of the chair legs away from the ground, a backrest installed on one side of the seat in the width direction, armrests provided on both sides of the seat in the length direction, and a lifting assembly provided between the armrests and the seat. The lifting assembly includes a mounting platform and a driving component. The mounting platform is installed on the seat, the driving component is installed on the side of the mounting platform away from the ground, and the armrests are installed on the side of the driving component away from the mounting platform. The driving component drives the armrests to slide towards or away from the seat.

[0004] In the above solution, the height of the handrail is adjusted by controlling the switch, the drive unit and the reinforcing bolts. This has the following disadvantages: in actual use, it is still necessary to lock and fix it with the reinforcing bolts. The adjustment process requires tools or complicated operation steps, which cannot achieve quick adjustment, affects the convenience of use, and significantly increases labor and time costs. Utility Model Content

[0005] The purpose of this utility model is to provide an adjustment mechanism for the armrests of office chairs, in order to solve the problem that in actual use, it is still necessary to use reinforcing bolts for locking and fixing, and the adjustment process must rely on tools or relatively complicated operation steps, which cannot achieve quick adjustment, affects the convenience of use, and significantly increases labor and time costs.

[0006] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: an adjustment mechanism for an office chair armrest, comprising two L-shaped frames, the two L-shaped frames being fixed to the left and right sides of the office chair body respectively. Several positioning grooves are provided on the front and rear sides of the inner wall of each L-shaped frame. An armrest body is inserted into the inner wall of the L-shaped frame. A T-shaped hole is provided on the bottom surface of the armrest body. Through holes are provided on the left and right sides of the inner wall of the T-shaped hole. A positioning post is inserted into the inner wall of the through hole, and the positioning post is inserted into the positioning groove. A spring is wound around the outer wall of the positioning post. One end of the spring is connected to the inner wall of the through hole, and the other end of the spring is connected to the outer wall of the positioning post. A slot is provided on the outer wall of the positioning post. An I-shaped frame is inserted into the inner wall of the T-shaped hole. A receiving groove is provided on the top surface of the armrest body. The T-shaped hole communicates with the receiving groove. The top end of the I-shaped frame is slidably connected to the receiving groove. Two tension springs are fixed to the inner bottom surface of the receiving groove, and the top ends of the tension springs are connected to the bottom surface of the I-shaped frame.

[0007] Preferably, the top surface of the bottom end of the I-shaped frame has two inclined surfaces, which fit into the slot.

[0008] Preferably, both the handrail body and the top surface of the I-beam frame are fixed with rubber pads.

[0009] Preferably, the top surface of the handrail body is provided with a strip groove.

[0010] Preferably, the outer wall of the right handrail body is provided with a snap-fit ​​groove, and the outer wall of the right handrail body is provided with a placement cylinder. A snap-fit ​​block is fixed to the outer wall of the placement cylinder, and the snap-fit ​​block is snapped into the snap-fit ​​groove.

[0011] Preferably, a flexible board is fixed to the office chair body, and the flexible board is covered with a breathable pad.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Through the coordinated action of positioning posts, springs, slots, I-beams, and tension springs, the handrail body can be quickly positioned and dynamically adjusted, allowing users to flexibly adjust its height as needed. This effectively saves labor costs and improves the adjustment efficiency and usability of the handrail body. The flexible material of the rubber pads protects the user's elbows, alleviating discomfort caused by prolonged contact between the elbow and the top surface of the handrail body, thus improving the overall usability of the handrail.

[0014] Second, the slotted design provides access to the I-shaped frame, allowing users to move it up and down, thus facilitating flexible height adjustment of the armrest. The storage tube provides convenient storage for cups or small items, avoiding tabletop obstruction or the risk of slipping, thereby enhancing its practicality. The flexible panel and breathable cushion work together to effectively support the user's lower back, adapting to posture and lumbar pressure to alleviate lumbar fatigue caused by prolonged sitting and prevent localized pressure. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of an embodiment.

[0016] Figure 2 This is a breakdown diagram of an embodiment.

[0017] Figure 3 This is a schematic diagram showing the disassembly of the positioning post in an embodiment.

[0018] Figure 4 For the example Figure 2 Enlarged diagram of point A in the middle.

[0019] In the diagram: 1. L-shaped frame; 2. Office chair body; 3. Positioning groove; 4. Armrest body; 5. T-shaped hole; 6. Through hole; 7. Positioning post; 8. Spring; 9. Groove; 10. I-shaped frame; 11. Receiving groove; 12. Tension spring; 13. Rubber pad; 14. Strip groove; 15. Snap-fit ​​groove; 16. Placement tube; 17. Snap-fit ​​block; 18. Flexible board; 19. Breathable pad. Detailed Implementation

[0020] The preferred embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0021] like Figures 1-4As shown, an adjustment mechanism for an office chair armrest includes two L-shaped frames 1, which are respectively fixed to the left and right sides of the office chair body 2. Several positioning grooves 3 are provided on the front and rear sides of the inner wall of each L-shaped frame 1. An armrest body 4 is inserted into the inner wall of the L-shaped frame 1. A T-shaped hole 5 is provided on the bottom surface of the armrest body 4. Through holes 6 are provided on the left and right sides of the inner wall of the T-shaped hole 5. Positioning pins 7 are inserted into the inner walls of the through holes 6, and the positioning pins 7 are inserted into the positioning grooves 3. A spring 8 is wound around the outer wall of the positioning pin 7, and one end of the spring 8 is connected to the through hole. The inner wall of 6 is connected, and the other end of the spring 8 is connected to the outer wall of the positioning post 7. The outer wall of the positioning post 7 is provided with a slot 9. The inner wall of the T-shaped hole 5 is provided with an I-shaped frame 10. The top surface of the handrail body 4 is provided with a receiving groove 11. The T-shaped hole 5 is connected to the receiving groove 11. The top end of the I-shaped frame 10 is slidably connected in the receiving groove 11. Two tension springs 12 are fixed on the inner bottom surface of the receiving groove 11. The top end of the tension springs 12 is connected to the bottom surface of the I-shaped frame 10. The top surface of the bottom end of the I-shaped frame 10 is provided with two inclined surfaces, which fit with the slot 9.

[0022] During use, when the position of the handrail body 4 needs to be adjusted, the user can apply a vertical axial pulling force to the I-beam frame 10, driving it to move vertically upward along the inner wall of the T-shaped hole 5. The tension spring 12 then undergoes elastic deformation, storing reset potential energy. At this time, the inclined surface at the bottom of the I-beam frame 10 forms a wedge fit with the slot 9. Through the inclined surface transmission principle, the vertical motion is converted into a radial component force. Under the continuous movement of the I-beam frame 10, the radial component force pushes the two positioning pins 7 to move axially in opposite directions, compressing the spring 8. Consequently, the positioning pins 7 will disengage from the positioning slot 3. When the column 7 is completely disengaged from the positioning groove 3 and retracts into the through hole 6, the user can move the handrail body 4 up and down as needed. When the handrail body 4 is moved to a suitable height, the tension on the I-shaped frame 10 can be released. The tension spring 12 releases its elastic potential energy to reset the I-shaped frame 10, so that the inclined surface of the I-shaped frame 10 exits the contact surface of the groove 9, releasing the radial constraint on the positioning column 7. Then, the spring 8 pushes the positioning column 7 to extend radially and insert it into the corresponding positioning groove 3, realizing the rigid positioning of the handrail body 4 and completing the up and down adjustment of the position of the handrail body 4.

[0023] Through the coordinated action of positioning column 7, spring 8, slot 9, I-shaped frame 10 and tension spring 12, the handrail body 4 can be quickly positioned and dynamically adjusted, allowing users to flexibly adjust the height of the handrail body 4 as needed, effectively saving labor costs, thereby improving the adjustment efficiency and usage effect of the handrail body 4.

[0024] like Figures 1-4As shown, rubber pads 13 are fixed on the top surfaces of the armrest body 4 and the I-beam frame 10. A strip groove 14 is opened on the top surface of the armrest body 4. A snap-fit ​​groove 15 is opened on the outer wall of the right armrest body 4. A placement tube 16 is provided on the outer wall of the right armrest body 4. A snap-fit ​​block 17 is fixed on the outer wall of the placement tube 16. The snap-fit ​​block 17 is snapped into the snap-fit ​​groove 15. A flexible board 18 is fixed on the office chair body 2. A breathable pad 19 is covered on the flexible board 18.

[0025] During use, the flexible material of the rubber pad 13 protects the user's elbows, alleviating discomfort caused by prolonged contact between the elbow and the top surface of the armrest body 4, thus improving the usability of the armrest body 4. The slot 14 provides access space for the I-shaped frame 10, allowing the user to move it up and down, facilitating flexible height adjustment of the armrest body 4. The storage tube 16 provides convenient storage space for cups or small items, avoiding tabletop obstruction or the risk of slipping, thus improving its practicality. The flexible plate 18 and the breathable pad 19 work together to effectively support the user's lower back, adapting to the user's posture and lumbar pressure, relieving lumbar fatigue caused by prolonged sitting and preventing localized pressure.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An adjustment mechanism for the armrest of an office chair, comprising two L-shaped frames (1), the two L-shaped frames (1) being respectively fixed to the left and right sides of the office chair body (2), characterized in that, The L-shaped frame (1) has several positioning grooves (3) on its front and rear sides. A handrail body (4) is inserted into the inner wall of the L-shaped frame (1). A T-shaped hole (5) is opened on the bottom surface of the handrail body (4). Through holes (6) are opened on both the left and right sides of the inner wall of the T-shaped hole (5). A positioning post (7) is inserted into the inner wall of the through hole (6). The positioning post (7) is inserted into the positioning groove (3). A spring (8) is wound around the outer wall of the positioning post (7). One end of the spring (8) is connected to the inner wall of the through hole (6). The other end of the spring (8) is connected to the outer wall of the positioning post (7). The outer wall of the positioning post (7) is provided with a slot (9). The inner wall of the T-shaped hole (5) is provided with an I-shaped frame (10). The top surface of the handrail body (4) is provided with a receiving groove (11). The T-shaped hole (5) is connected to the receiving groove (11). The top end of the I-shaped frame (10) is slidably connected in the receiving groove (11). Two tension springs (12) are fixed on the bottom surface of the receiving groove (11). The top end of the tension springs (12) is connected to the bottom surface of the I-shaped frame (10).

2. The adjustment mechanism for an office chair armrest according to claim 1, characterized in that: The bottom of the I-shaped frame (10) has two inclined surfaces on its top surface, which fit into the slot (9).

3. The adjustment mechanism for an office chair armrest according to claim 1, characterized in that: Both the top surfaces of the handrail body (4) and the I-beam frame (10) are fixed with rubber pads (13).

4. The adjustment mechanism for an office chair armrest according to claim 3, characterized in that: The top surface of the handrail body (4) is provided with a strip groove (14).

5. The adjustment mechanism for an office chair armrest according to claim 4, characterized in that: The outer wall of the right handrail body (4) is provided with a snap-fit ​​groove (15), and the outer wall of the right handrail body (4) is provided with a placement cylinder (16). The outer wall of the placement cylinder (16) is fixed with a snap-fit ​​block (17), and the snap-fit ​​block (17) is snapped into the snap-fit ​​groove (15).

6. The adjustment mechanism for an office chair armrest according to claim 1, characterized in that: A flexible board (18) is fixed on the office chair body (2), and a breathable pad (19) is covered on the flexible board (18).

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