Stable limiting type front-back adjusting device for swivel chair tray
By designing an L-shaped slot and inclined groove structure on the swivel chair tray, a limiting front and rear adjustment device is developed, which solves the problem of insufficient limiting of traditional swivel chair adjustment devices and achieves stable and precise adjustment in a large-volume body.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HANGZHOU TONGBEN MOLD MFG
- Filing Date
- 2025-06-12
- Publication Date
- 2026-04-17
AI Technical Summary
Traditional swivel chair adjustment mechanisms lack limiting structures, which means that the adjustment lever cannot be moved smoothly or lacks precision when a large body is required, thus limiting its applicability.
Design a body structure including an upper cover and a lower cover, with an L-shaped slot, an adjusting rod slidingly connected to a flat slot, an inclined slot providing rotation space, and springs and bolts ensuring stable limiting and automatic reset of the adjusting rod.
It achieves stable limiting and precise adjustment of the adjustment rod in the case of a large-volume body, improving the applicability and accuracy of the swivel chair adjustment device.
Smart Images
Figure CN224125560U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of swivel chair technology, specifically a stable limiting type front and rear adjustment device for swivel chair trays. Background Technology
[0002] Chairs are an important category of furniture, and swivel chairs are a significant branch, widely used in office settings such as office buildings. Traditional swivel chairs can be height-adjusted to help users achieve a comfortable sitting posture. Although swivel chairs can move back and forth using wheels, this movement is inevitably limited when the workspace is small, making it difficult to move them forward and backward as needed. To solve this problem, engineers designed an adjustment device. Simply by turning an adjustment lever, the seat portion of the swivel chair can move back and forth relative to the support portion. The main structure of this adjustment device consists of an adjustment lever and a main body. One end of the adjustment lever is movably installed within the main body, allowing the adjustment lever to lock the seat portion of the swivel chair to the support portion in its natural state, and to move smoothly when turned. The current mainstream design of the main body resembles a standard cuboid. The adjustment rod and related structures, such as the spring, are placed directly inside the main body without a specific limiting structure. While this allows the adjustment rod to be turned smoothly, it benefits more from the small size of the main body and provides a certain limiting effect. This obviously limits the applicability of the adjustment device. When a larger main body is required, the lack of a limiting structure may cause the adjustment rod to be unable to be turned smoothly, or even if it can be turned, it is difficult to guarantee accuracy. Based on this situation, how to make the front and rear adjustment device of the swivel chair have the necessary limiting structure to improve its applicability while ensuring accuracy has become an increasingly urgent problem for relevant technicians to solve. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a stable limiting type front and rear adjustment device for a swivel chair tray.
[0004] A stabilizing and limiting front-to-back adjustment device for a swivel chair tray includes a main body, an adjustment rod disposed on one side of the main body, and a grip plate fixedly disposed at one end of the adjustment rod. The main body includes an upper cover and a lower cover. The upper cover has an upper groove inside, which includes an upper end groove, an upper flat groove, and an upper inclined groove. The lower cover has a lower groove inside, which includes a lower end groove, a lower flat groove, and a lower inclined groove. The end of the adjustment rod away from the grip plate passes through the upper and lower grooves and protrudes outside the main body. The upper and lower end grooves constitute the inlet of the main body. The adjustment rod is slidably connected to the upper and lower flat grooves. The upper and lower inclined grooves constitute the outlet of the main body.
[0005] Furthermore, both the upper and lower grooves are L-shaped when viewed from above.
[0006] Furthermore, the upper inclined groove is inclined upwards, and the lower inclined groove is inclined downwards, with the inclination angle of both the upper and lower inclined grooves being 10-15 degrees.
[0007] Furthermore, a spring is sleeved around the adjusting rod, and the end of the spring away from the body is hooked to the adjusting rod. The middle part of the spring is located between the upper and lower grooves. A positioning groove is provided inside the upper cover, and the end of the spring near the body is engaged with the positioning groove.
[0008] Furthermore, a bolt is provided at the lower part of the lower cover, and the bolt is threaded to both the lower cover and the upper cover. The tail of the bolt is vertically upward and exposed at the upper part of the upper cover.
[0009] The beneficial effects of the stabilizing and limiting front-to-back adjustment device for a swivel chair tray of this utility model are as follows:
[0010] 1. The upper and lower grooves and their L-shaped design that adapts to the adjusting rod effectively ensure the stable limiting of the adjusting rod. Even if the swivel chair requires a large body volume, the adjusting rod can be moved smoothly and with precision, thereby effectively improving the applicability of this adjusting device.
[0011] 2. The upper and lower inclined grooves provide ample rotation space for the adjusting rod. Even if the adjusting rod is tilted after being moved or reset, its tilt design can ensure full contact with the adjusting rod, thereby effectively ensuring the strength of the body.
[0012] 3. The spring and its connection with the adjusting rod and the main body effectively ensure the automatic reset of the adjusting rod after release, and at the same time effectively ensure the stability of the engagement between the end of the adjusting rod away from the grip plate and the swivel chair tray. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below, but this is not a limitation on the protection scope of this utility model.
[0014] Figure 1 This is a schematic diagram of the application scenario of this utility model (I);
[0015] Figure 2 This is a schematic diagram of the application scenario of this utility model (II);
[0016] Figure 3 This is a schematic diagram of the upper structure of this utility model;
[0017] Figure 4 This is a schematic diagram of the internal structure of the present invention (I, not showing the grip plate and some adjustment rods);
[0018] Figure 5 This is a schematic diagram of the external structure of the lower cover of this utility model;
[0019] Figure 6 This is a schematic diagram of the lower structure of this utility model;
[0020] Figure 7 This is a schematic diagram of the internal structure of the present invention (II, not showing the grip plate and some adjustment rods);
[0021] Figure 8 This is a schematic diagram of the internal structure of the top cover of this utility model.
[0022] Among them, 1-bolt, 2-body, 3-grip, 4-adjusting rod, 5-spring, 6-top cover, 7-lower groove, 8-lower end groove, 9-lower flat groove, 10-lower inclined groove, 11-lower cover, 12-upper end groove, 13-upper flat groove, 14-upper inclined groove, 15-positioning groove. Detailed Implementation
[0023] To make the explanation clearer, the present invention provides a further description of a stable limiting type front and rear adjustment device for a swivel chair tray, in conjunction with the accompanying drawings.
[0024] A stabilizing and limiting type front-to-back adjustment device for a swivel chair tray includes a body 2, an adjustment rod 4 is provided on one side of the body 2, and a handle 3 is fixedly provided at one end of the adjustment rod 4. The body 2 includes an upper cover 6 and a lower cover 11. The upper cover 6 has an upper groove inside, which includes an upper end groove 12, an upper flat groove 13, and an upper inclined groove 14. The lower cover 11 has a lower groove 7 inside, which includes a lower end groove 8, a lower flat groove 9, and a lower inclined groove 10. The end of the adjustment rod 4 away from the handle 3 passes through the upper groove and the lower groove 7 and is exposed outside the body 2. The upper end groove 12 and the lower end groove 8 constitute the inlet of the body 2. The adjustment rod 4 is slidably connected to the upper flat groove 13 and the lower flat groove 9. The upper inclined groove 14 and the lower inclined groove 10 constitute the outlet of the body 2.
[0025] Furthermore, both the upper and lower grooves 7 are L-shaped in the top view.
[0026] Furthermore, the upper inclined groove 14 is inclined upwards, and the lower inclined groove 10 is inclined downwards, with the inclination angles of both the upper inclined groove 14 and the lower inclined groove 10 being 10-15 degrees.
[0027] Furthermore, a spring 5 is sleeved around the adjusting rod 4, and the end of the spring 5 away from the body 2 is hooked to the adjusting rod 4. The middle part of the spring 5 is located between the upper end groove 12 and the lower end groove 8. A positioning groove 15 is provided inside the upper cover 6, and the end of the spring 5 near the body 2 is engaged with the positioning groove 15.
[0028] Furthermore, a bolt 1 is provided at the lower part of the lower cover 11. The bolt 1 is threadedly connected to both the lower cover 11 and the upper cover 6. The tail of the bolt 1 is vertically upward and exposed on the upper part of the upper cover 6.
[0029] The working principle of this utility model's stable limiting type front-to-back adjustment device for a swivel chair tray is as follows: The upper cover 6 and lower cover 11, i.e., the main body 2, are fixed as a whole to the swivel chair seat part, i.e., the lower part of the swivel chair tray, by bolt 1. At this time, the tail of bolt 1 is threadedly connected to the swivel chair tray. In the initial state, the exposed part of the adjusting rod 4 near the outlet of the main body 2 is engaged with the toothed groove at the rear of the swivel chair support part, i.e., the swivel chair base. At this time, the seat part is located at the rear. If the user wants to adjust the position forward, but the working space is small and it is difficult to move forward by using the wheels, the device will be unsuitable. To move the seat, grasp the grip plate 3 and lift it. Under the sliding limit of the upper flat groove 13 and the lower flat groove 9, the adjusting rod 4 rotates until it fits against the lower inclined groove 10. At this time, the adjusting rod 4 is no longer engaged with the toothed groove. The user can move the seat forward until the requirement is met, then release the grip plate 3. The spring 5 will automatically reset the adjusting rod 4. After resetting, the adjusting rod 4 will engage with the front toothed groove. If it does not engage accurately in the toothed groove, move the seat back and forth slightly to engage the adjusting rod 4 with the closest toothed groove. This completes one adjustment process.
[0030] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.
Claims
1. A stable and limiting type of forward and backward adjustment device for a swivel chair tray, comprising a body, one side of which is provided with an adjustment rod, one end of which is fixedly provided with a grip plate, characterized in that: The main body includes an upper cover and a lower cover. The upper cover has an upper groove inside, which includes an upper end groove, an upper flat groove, and an upper inclined groove. The lower cover has a lower groove inside, which includes a lower end groove, a lower flat groove, and a lower inclined groove. The end of the adjusting rod away from the grip plate passes through the upper and lower grooves and is exposed outside the main body. The upper and lower end grooves constitute the inlet of the main body. The adjusting rod is slidably connected to the upper flat groove and the lower flat groove. The upper and lower inclined grooves constitute the outlet of the main body.
2. The stable and position limited forward and backward adjustment device for swivel chair tray according to claim 1, characterized in that, Both the upper and lower grooves are L-shaped when viewed from above.
3. The stable and position limited forward and backward adjustment device for swivel chair tray according to claim 1, characterized in that, The upper inclined groove is inclined upward, and the lower inclined groove is inclined downward, with the inclination angle of both the upper and lower inclined grooves being 10-15 degrees.
4. The stable and position limited forward and backward adjustment device for swivel chair tray according to claim 1, characterized in that, A spring is sleeved around the adjusting rod. The end of the spring away from the body is hooked to the adjusting rod. The middle part of the spring is located between the upper and lower grooves. A positioning groove is provided inside the upper cover. The end of the spring near the body is engaged with the positioning groove.
5. The stable and position limited forward and backward adjustment device for swivel chair tray according to claim 1, characterized in that, The lower part of the lower cover is provided with bolts, which are threaded to both the lower cover and the upper cover. The tail of the bolt is vertically upward and exposed on the upper part of the upper cover.