Spring pressure adjustable office chair waist rest

Abstract

The utility model discloses a spring pressure adjustable office chair waist rest, including waist rest body, still including movable support, spring and adjusting screw rod, the connecting portion of waist rest body upper portion and the recessed portion rotation connection of back, the connecting portion place is fixed with the limiting block through screw, the movable support horizontal sliding connection is in the mounting head of back, the spring one end and movable support abut, the spring other end and the limiting head of waist rest body lower part abut, the adjusting screw rod and movable support inside screw portion are screwed together.

Description

Technical Field

[0001] This utility model belongs to the field of office chair technology and relates to a spring-pressure adjustable office chair lumbar support. Background Technology

[0002] Office chairs are seats specifically designed for office environments, with the initial aim of improving user comfort and health. However, the lumbar support in existing office chairs is usually fixed and lacks adjustability, failing to provide personalized pressure adjustments based on user habits. This design flaw makes it difficult for people of different body types or those who sit for long periods to achieve the ideal support they need, potentially impacting postural health in the long run. Therefore, designing a spring-loaded adjustable lumbar support for office chairs to address these issues is particularly necessary. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a spring-pressure adjustable lumbar support for office chairs.

[0004] To achieve the above objectives, the technical solution of this utility model is: a spring-pressure adjustable office chair lumbar support, including a lumbar support body, a movable support, a spring, and an adjusting screw. The connecting part at the upper part of the lumbar support body is rotatably connected to the groove part of the backrest. A limiting block is fixed at the connecting part by screws. The movable support is horizontally slidably connected to the mounting head of the backrest. One end of the spring abuts against the movable support, and the other end of the spring abuts against the limiting head at the lower part of the lumbar support body. The adjusting screw is threadedly connected to the threaded part inside the movable support.

[0005] An adjustment knob is also fixed on the adjustment screw.

[0006] The mounting head has multiple guide grooves inside, and the movable support has guide strips that slide in conjunction with the guide grooves on the outside.

[0007] A decorative cover is also fixed to the adjustment knob by a tight fit.

[0008] The contact surfaces of the connecting part and the groove are both semi-circular, and the contact surfaces of the limiting block and the groove are both semi-circular.

[0009] By adopting the above technical solution, the beneficial effects of this utility model are: This utility model achieves the elastic swing function of the lumbar support by rotating the connecting part at the upper part of the lumbar support body to the groove part of the backrest, combined with the structural design of the lower part providing elastic support by spring. It can adapt to the lumbar curve of different users. At the same time, by rotating the adjusting screw, the movable support can be driven to slide horizontally in the mounting head of the backrest, thereby changing the compression of the spring and adjusting the lumbar support pressure. This meets the personalized needs of users with different body types and different sitting habits, effectively improving the lumbar comfort and health when sitting for a long time. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is an exploded view of this utility model; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a three-dimensional structural diagram of the movable support in this utility model; Figure 5 This is an exploded view of the removed portion of this utility model; Figure 6 This is a three-dimensional structural diagram of the backrest in this utility model; In the diagram, 1. Backrest; 1a. Mounting head; 1a1. Guide groove; 1b. Groove; 2. Adjustment knob; 3. Lumbar support body; 3a. Connecting part; 3b. Limiting head; 4. Spring; 5. Movable support; 5a. Threaded part; 5b. Guide bar; 6. Adjustment screw; 7. Screw; 8. Decorative cover; 9. Limiting block. Detailed Implementation

[0011] To further explain the technical solution of this utility model, the following detailed description is provided through specific embodiments.

[0012] like Figure 1-6 As shown, this adjustable spring pressure office chair lumbar support includes a lumbar support body 3, a movable support 5, a spring 4, and an adjusting screw 6. The connecting part 3a on the upper part of the lumbar support body 3 is rotatably connected to the groove part 1b of the backrest 1. A limiting block 9 is fixed at the connecting part 3a by a screw 7, which allows the lumbar support body 3 to rotate within a certain angle range. The movable support 5 is horizontally slidably connected to the mounting head 1a of the backrest 1. One end of the spring 4 abuts against the movable support 5, and the other end of the spring 4 abuts against the limiting head 3b at the lower part of the lumbar support body 3. The adjusting screw 6 is threadedly connected to the threaded part 5a inside the movable support 5. An adjusting knob 2 is also fixed on the adjusting screw 6.

[0013] The mounting head 1a has multiple guide grooves 1a1 inside, and the movable support 5 has a guide bar 5b that slides with the guide grooves 1a1 on the outside. The sliding engagement between the guide grooves 1a1 and the guide bar 5b ensures the stability of the movable support 5 when it moves horizontally within the mounting head 1a, and avoids jamming or offset during the adjustment process, thereby ensuring the smoothness and accuracy of the spring 4 pressure adjustment.

[0014] A decorative cover 8 is also fixed to the adjustment knob 2 by a tight fit; the decorative cover 8 not only beautifies the appearance of the adjustment knob 2, but also prevents dust from entering the interior.

[0015] The contact surfaces of the connecting part 3a and the groove part 1b are both semi-circular, as are the contact surfaces of the limiting block 9 and the groove part 1b. The semi-circular contact surface design of the connecting part 3a and the groove part 1b, together with the limiting block 9 restricting the rotation angle of the lumbar support body 3, allows the lumbar support to make a small adaptive rotation around the connection point when under force, further improving the fit between the lumbar support and the waist curve, and ensuring that the lumbar support can always provide stable and comfortable support for the waist under different pressure conditions.

[0016] In this utility model, when the user rotates the adjustment knob 2 counterclockwise, the adjustment screw 6 drives the movable support 5 to move backward, reducing the compression of the spring 4, weakening the lumbar support force, making it easier to be pressed by the waist, providing soft support, and meeting the needs of users who prefer a relaxed support feel; When the user rotates the adjustment knob 2 clockwise, the adjustment screw 6 pushes the movable support 5 forward, increasing the compression of the spring 4, which will forcefully push the lumbar support forward, providing a more active and stronger lumbar support. Due to the elasticity of the spring 4 itself, there will be a rebound margin when the user leans down, allowing the lumbar support to fit the waist more closely.

[0017] In summary, by adjusting the screw 6 and the threaded connection of the movable support 5 to change the compression level of the spring 4, users with different weights and lumbar support needs can quickly find the appropriate pressure level, solving the problem that traditional fixed lumbar supports cannot adapt to individual needs.

[0018] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0019] The above embodiments and figures are not intended to limit the product form and style of this utility model. Any appropriate changes or modifications made by those skilled in the art should be considered as not departing from the patent scope of this utility model.

Claims

1. A spring-loaded adjustable lumbar support for an office chair, comprising a lumbar support body (3), characterized in that, It also includes a movable support (5), a spring (4) and an adjusting screw (6). The connecting part (3a) on the upper part of the lumbar support body (3) and the groove part (1b) of the backrest (1) are rotatably connected. A limiting block (9) is fixed at the connecting part (3a) by a screw (7). The movable support (5) is horizontally slidably connected in the mounting head (1a) of the backrest (1). One end of the spring (4) abuts against the movable support (5), and the other end of the spring (4) abuts against the limiting head (3b) at the lower part of the lumbar support body (3). The adjusting screw (6) is threadedly connected to the threaded part (5a) inside the movable support (5).

2. The adjustable spring pressure lumbar support for an office chair according to claim 1, characterized in that, An adjustment knob (2) is also fixed on the adjustment screw (6).

3. The adjustable spring pressure lumbar support for an office chair according to claim 1, characterized in that, The mounting head (1a) has multiple guide grooves (1a1) inside, and the movable support (5) has a guide bar (5b) that slides with the guide grooves (1a1) on the outside.

4. The adjustable spring pressure lumbar support for an office chair according to claim 2, characterized in that, A decorative cover (8) is also fixed to the adjustment knob (2) by a tight fit.

5. The adjustable spring pressure lumbar support for an office chair according to claim 1, characterized in that, The contact surfaces of the connecting part (3a) and the groove part (1b) are semi-circular, and the contact surfaces of the limiting block (9) and the groove part (1b) are also semi-circular.

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