Dual damping structure for bottom tray of office chair

Abstract

The utility model relates to the technical field of double damping structures for bottom trays of office chairs, and discloses a double damping structure for bottom trays of office chairs, which comprises a support frame and a fork arm tray frame, the fork arm tray frame is sleeved at the upper end of the support frame, and a seat tray support is hinged to the front end of the fork arm tray frame. Two supporting faces are symmetrically arranged on the seat tray support left and right to support and fix a chair, a spring is arranged on the hinged stroke of the seat tray support relative to the fork arm tray frame and used for absorbing impact kinetic energy, and an adjuster is further arranged in the fork arm tray frame and used for adjusting the initial length of the spring. Through the hinge structure arranged at the bottom of the chair, the chair has a certain downward pressing displacement stroke, the spring damping body is adopted as a force release part, and energy absorption and buffering are achieved through deformation of the spring damping body and hinge displacement of the chair tray support relative to the fork arm tray frame during working.

Description

TECHNICAL FIELD

[0001] The utility model relates to office chair bottom tray double damping structure technical field especially an office chair bottom tray double damping structure. BACKGROUND

[0002] The existing seat generally does not have the special damping structure, so that the impact force produced due to gravity and inertia when a person sits down forms greater pressure on each connecting joint of the seat, and the ride comfort is also poor.

[0003] In order to improve the ride comfort, the case is proposed. INVENTION CONTENTS

[0004] An office chair bottom tray double damping structure, including support frame, still including fork arm tray frame wherein fork arm tray frame is sleeved in the upper end of support frame, and seat tray support is hingedly arranged at the front end of fork arm tray frame, seat tray support is provided with two support surfaces symmetrical left and right to support and fix chair, spring is arranged on the stroke of seat tray support relative to fork arm tray frame for absorbing impact kinetic energy, and an adjuster is further arranged in fork arm tray frame for adjusting the initial length of spring.

[0005] Preferably, the spring is a spring damping body, and the two ends of the spring damping body are respectively abutted against the opposite surfaces of the fork arm tray frame and the seat tray support, the chair forms downward pressure after sitting, and the seat tray support is twisted, the middle part of the seat tray support contacts the spring damping body, the spring damping body is compressed, and the damping effect is achieved.

[0006] Preferably, the ball head top block further includes a ball head portion hingedly arranged in the inner wall of the seat tray support, and one end of the spring damping body is abutted against the flat portion of the ball head top block, so that the seat tray support can slide and rub with the ball head portion of the ball head top block and the seat tray support when hingedly rotating, and better cooperation effect is achieved.

[0007] Preferably, the spring damping body is provided with two, so that double effect can be achieved, and left and right symmetry makes the stress area larger and the action more stable.

[0008] Preferably, the fork arm tray frame is provided with an adjusting oil cavity, the adjuster is threadedly connected to the fork arm tray frame and is provided with a piston block at the inner end, the piston block slides in the adjusting oil cavity and is in sealing contact with the inner wall thereof.

[0009] Preferably, the fork arm tray frame is also slidably provided with a piston head block, wherein one end of the spring damping body abuts against the piston head block, the piston head block slides in a working sliding groove arranged in the fork arm tray frame, the adjusting oil cavity and the working sliding groove are communicated, when unloaded, rotating the adjuster injects oil into the working sliding groove, thereby pushing the piston head block outward to change the initial tightness of the spring damping body to achieve different comfort damping effects.

[0010] The utility model has the advantages and positive effects that:

[0011] 1. The hinge structure arranged at the bottom of the chair has a certain downward displacement stroke, and the spring damping body is used as a force relief component, in working, energy absorption and buffering are realized through deformation of the spring damping body and relative hinge displacement of the seat tray support frame relative to the fork arm tray frame, the direct impact force on the support frame when sitting is effectively reduced, the use experience is improved, and the service life of the seat is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further described below in combination with the drawings and examples.

[0013] Figure 1 is the structural schematic diagram of the utility model;

[0014] Figure 2 is the structural schematic diagram of the utility model;

[0015] Figure 3 is the structural schematic diagram of the utility model;

[0016] Figure 4 is the structural schematic diagram of the utility model;

[0017] Figure 5 is Figure 4 A-A full section structure schematic diagram.

[0018] In the drawings, 10, support frame; 12, fork arm tray frame; 13, spring damping body; 14, seat tray support frame; 15, chair; 16, adjuster; 17, adjusting oil cavity; 18, working sliding groove; 19, piston head block; 20, ball head block. DETAILED DESCRIPTION

[0019] The utility model will be further described below in combination with the drawings and examples.

[0020] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0021] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0022] like Figures 1-5 As shown, the present invention discloses a double shock-absorbing structure for the bottom tray of an office chair, including a support frame 10 and a fork-arm tray frame 12. The fork-arm tray frame 12 is fitted onto the upper end of the support frame 10, and a seat tray bracket 14 is hinged to the front end of the fork-arm tray frame 12. The seat tray bracket 14 has two symmetrical support surfaces on its left and right sides to support and fix the chair 15. A spring is provided on the travel of the seat tray bracket 14 relative to the fork-arm tray frame 12 to absorb impact kinetic energy, and an adjuster is also provided in the fork-arm tray frame 12 to adjust the initial length of the spring.

[0023] Preferably, the spring is a spring damper 13, with both ends of the spring damper 13 abutting against the opposite surfaces of the fork arm tray frame 12 and the seat tray support 14, respectively. When seated, the chair 15 exerts downward pressure, thereby twisting the seat tray support 14. The middle part of the seat tray support 14, which contacts the spring damper 13, compresses the spring damper 13 to achieve a shock absorption effect.

[0024] Preferably, it also includes a ball head block 20, wherein the ball head portion of the ball head block 20 is hinged to the inner wall of the seat tray support 14, and one end of the spring damper 13 abuts against the flat portion of the ball head block 20, so that when the seat tray support 14 rotates hingedly, the ball head portion of the ball head block 20 and the seat tray support 14 can slide and rub against each other to achieve a better fit.

[0025] Preferably, there are two spring dampers 13, which can play a dual role and are symmetrical from left to right, resulting in a larger force-bearing area and more stable operation.

[0026] Preferably, the fork arm tray frame 12 is provided with an adjusting oil cavity 17, the adjuster 16 is threadedly connected to the fork arm tray frame 12 and is provided at an inner end with a piston block, the piston block slides in the adjusting oil cavity 17 and is in sealing contact with an inner wall of the adjusting oil cavity 17.

[0027] Preferably, the fork arm tray frame 12 is further provided with a piston top block 19, one end of the spring damping body 13 abuts against the piston top block 19, the piston top block 19 slides in a working sliding groove 18 arranged in the fork arm tray frame 12, the adjusting oil cavity 17 and the working sliding groove 18 are communicated, when unloaded, rotating the adjuster 16 injects oil into the working sliding groove 18, thereby externally pushing the piston top block 19 to change the initial tightness of the spring damping body 13 to achieve different damping effects of different comfort levels.

[0028] It is emphasized that the embodiments of the utility model are illustrative rather than restrictive, thus the utility model is not limited to the embodiments described in the specific embodiments, any other embodiments derived by those skilled in the art according to the technical scheme of the utility model also belong to the protection scope of the utility model.

Claims

1. A double damping structure for an office chair bottom tray comprising a support frame (10), characterized in that: It also includes a fork arm tray frame (12), which is fitted onto the upper end of the support frame (10), and a seat tray bracket (14) is hinged to the front end of the fork arm tray frame (12). The seat tray bracket (14) has two symmetrical support surfaces on the left and right sides to support and fix the chair (15). A spring is provided on the travel of the seat tray bracket (14) relative to the fork arm tray frame (12) to absorb impact kinetic energy. An adjuster is also provided in the fork arm tray frame (12) to adjust the initial length of the spring.

2. The dual shock absorbing structure for the bottom tray of an office chair according to claim 1, characterized in that: The spring is a spring damper (13). The two ends of the spring damper (13) abut against the opposite surfaces of the fork arm tray frame (12) and the seat tray support (14). When the chair (15) is seated, it exerts downward pressure, which in turn twists the seat tray support (14). The middle part of the seat tray support (14) that contacts the spring damper (13) compresses the spring damper (13) to achieve a shock absorption effect.

3. The dual shock absorbing structure for the bottom tray of an office chair according to claim 2, characterized in that: It also includes a ball head block (20), wherein the ball head portion of the ball head block (20) is hinged to the inner wall of the seat tray support (14), and one end of the spring damper (13) abuts against the flat portion of the ball head block (20). In this way, when the seat tray support (14) rotates hingedly, the ball head portion of the ball head block (20) and the seat tray support (14) can slide and rub against each other to achieve a better fit.

4. The double shock-absorbing structure for the bottom tray of an office chair according to claim 3, characterized in that: Two spring dampers (13) are provided, which can play a dual role and are symmetrical on both sides, so that the force-bearing area is larger and the movement is more stable.

5. The double shock-absorbing structure for the bottom tray of an office chair according to claim 4, characterized in that: The fork arm pallet frame (12) is provided with an adjusting oil chamber (17). The adjuster (16) is threadedly connected to the fork arm pallet frame (12) and a piston block is fixedly provided at its inner end. The piston block slides in the adjusting oil chamber (17) and is in sealed contact with its inner wall.

6. The double shock-absorbing structure for the bottom tray of an office chair according to claim 5, characterized in that: A piston top block (19) is also slidably provided inside the fork arm pallet frame (12), wherein one end of the spring damper (13) abuts against the piston top block (19), and the piston top block (19) slides in the working slide groove (18) arranged in the fork arm pallet frame (12). The adjusting oil chamber (17) is connected to the working slide groove (18). When unloaded, rotating the adjuster (16) injects oil into the working slide groove (18), thereby pushing the piston top block (19) outward and changing the initial tightness of the spring damper (13), which can achieve different levels of shock absorption effect.

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