Adjustable chair back supporting structure

Abstract

The utility model discloses an adjustable chair back supporting structure which comprises a chair back and a supporting plate, an adjusting channel is formed in the rear side of the chair back, the supporting plate is provided with an adjusting column used for being inserted into and slidably connected to the adjusting channel, and a fixing piece used for extruding the adjusting column is arranged on the chair back. The fixing piece comprises a screwing block rotationally connected to the chair back and a rubber block connected to the screwing block and used for stretching into the adjusting channel, and the rubber block is used for abutting against the adjusting column for fixing. Compared with the prior art, the device has the following effects that for different users, the effect that the rubber block abuts against the adjusting column can be achieved through rotation of the screwing block, the adjusting column can slide up and down in the adjusting channel in the non-abutting state, and therefore adjustment of the supporting plate is achieved so as to adapt to different use requirements.

Description

Technical Field

[0001] The present application relates to the technical field of seat backs, and in particular to an adjustable seat back support structure. Background Art

[0002] At this stage, ergonomic chairs are very effective for users who work or study for a long time. They have a support plate to provide sufficient support for the waist to improve comfort.

[0003] However, in most seats, the support plate is fixedly connected to the chair back. When the user changes or the seat is adjusted, the support plate part often cannot support the waist well, resulting in reduced comfort. Utility Model Content

[0004] In order to achieve the purpose of adjusting the support plate, the present application provides an adjustable chair back support structure.

[0005] The present application provides an adjustable chair back support structure, which adopts the following technical solution: an adjustable chair back support structure, comprising a chair back and a support plate, wherein the back side of the chair back has an adjustment channel, the support plate has an adjustment column for being inserted into and slidably connected to the adjustment channel, the chair back is provided with a fixing member for squeezing the adjustment column, the fixing member comprises a screw block rotatably connected to the chair back, a rubber block connected to the screw block and used to extend into the adjustment channel, the rubber block is used to press against the adjustment column for fixation.

[0006] By adopting the above technical solution, for different users, the effect of the rubber block pressing on the adjustment column can be achieved by rotating the screw block. In the non-pressing state, the adjustment column can slide up and down in the adjustment channel, thereby achieving adjustment of the support plate to adapt to different usage requirements.

[0007] Preferably, one end of the rubber block away from the screw block has a threaded column threadedly connected to the other side of the adjustment channel.

[0008] Preferably, the adjusting column has a long hole arranged along the sliding direction, and the threaded column passes through the long hole.

[0009] Preferably, the chair back has a circular groove for the rubber block to be embedded in.

[0010] Preferably, a sliding block located in the long hole is provided on the threaded column, elastic members are provided on both sides of the sliding block, and the inner wall of the long hole has a plurality of continuous limiting holes for the elastic members to be embedded in along the extension direction.

[0011] In summary, the present application includes at least one of the following beneficial technical effects:

[0012] 1. For different users, the rubber block can be pressed against the adjustment column by rotating the screw block. In the non-pressing state, the adjustment column can slide up and down in the adjustment channel, thereby adjusting the support plate to meet different usage requirements;

[0013] 2. During the sliding process and when the screw block is not tightened, the elastic member can be embedded into the limiting hole as it slides, and positioning is achieved in the vertical direction. This also prevents the screw block from shifting during the pressing process, making it easier to adjust and fix. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the structure of Example 1 of the present application;

[0015] Figure 2 is a partial cross-sectional view of Example 1 of the present application;

[0016] Figure 3 It is a schematic diagram of the connection relationship between the slider and the long hole in Example 2 of the present application.

[0017] Explanation of the reference numerals: 100, chair back; 110, support plate; 111, adjustment channel; 112, adjustment column; 113, long hole; 114, screw block; 115, rubber block; 116, threaded column; 117, accommodating circular groove; 120, limiting hole; 121, avoidance groove; 122, structural rod; 123, arc-shaped convex ring; 130, slider. DETAILED DESCRIPTION

[0018] The present application is further described in detail below in conjunction with the accompanying drawings. Example

[0019] An adjustable chair back support structure, referring to Figure 1 , Figure 2 , including a chair back 100 and a support plate 110, the chair back 100 has an adjustment channel 111 on the rear side, the support plate 110 has an adjustment column 112 for being inserted into and slidably connected to the adjustment channel 111, and a long hole 113 is provided on the adjustment column 112 along the length direction.

[0020] The chair back 100 is provided with a fixing member for squeezing the adjustment column 112, and the fixing member includes a screw block 114 rotatably connected to the chair back 100, and a rubber block 115 connected to the screw block 114 and used to extend into the adjustment channel 111, and the rubber block 115 is used to press against the adjustment column 112 for fixing. The end of the rubber block 115 away from the screw block 114 has a threaded column 116 threadedly connected to the other side of the adjustment channel 111.

[0021] At the same time, there is a circular accommodating groove 117 on the chair back 100 that is the same circular shape as the rubber block 115. When the threaded column 116 is tightened onto the chair back 100, the rubber block 115 will be embedded into the circular accommodating groove 117 along the axial direction of the threaded column 116, and will eventually press against the adjustment column 112. Such a pressing effect can fix the adjustment column 112.

[0022] Such a structure is also very convenient in actual installation. The adjustment column 112 is inserted into the adjustment channel 111, and then the fixing piece is inserted into the accommodating circular groove 117, so that the threaded column 116 is tightened on the other side of the chair back 100. When the threaded column 116 passes through the long hole 113, the support plate 110 can be freely slid and adjusted. After the adjustment is completed, it is tightened by tightening the screw block 114 so that the rubber block 115 is pressed against the adjustment column 112 for fixation. Example

[0023] The difference from Example 1 is that, referring to Figure 3 After the adjustment is completed, the screw block 114 needs to be tightened again. At this time, the adjustment column 112 may slip, resulting in adjustment deviation. In this embodiment, the threaded column 116 also has a slider 130, and the slider 130 is located in the long hole 113.

[0024] The slider 130 has elastic members on both sides, and the inner wall of the long hole 113 has a plurality of continuous limiting holes 120 for the elastic members to be embedded in the extension direction. The outer wall of the slider 130 is recessed to form an avoidance groove 121, and the elastic member includes a structural rod 122 connected in parallel at the bottom of the avoidance groove 121, and an arc-shaped convex ring 123 connected between the two structural rods 122, and the top of the arc-shaped convex ring 123 faces and is used to be embedded in the limiting hole 120. The distance between the ends of the two structural rods 122 connected to the inner wall of the avoidance groove 121 and the other end gradually increases. That is, the two structural rods 122 are arranged obliquely, and their inclination angle is convenient for deformation.

[0025] It should be noted that, in terms of depth, the top of the arc-shaped convex ring 123 will protrude outward from the avoidance groove 121, and the end of the structural rod 122 will always remain in the avoidance groove 121 during the deformation process. During the sliding of the support plate 110, the slider 130 will slide along with it, and the arc-shaped convex ring 123 will continue to be embedded in the limiting hole 120 to achieve a temporary fixing effect, so that when the screw block 114 is tightened, it can be kept in the required position to improve the accuracy of adjustment.

[0026] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An adjustable chair back support structure, comprising a chair back (100) and a support plate (110), characterized in that: The back of the chair back (100) is provided with an adjustment channel (111), the support plate (110) is provided with an adjustment column (112) for being inserted into and slidably connected to the adjustment channel (111), and a fixing member for pressing the adjustment column (112) is provided on the chair back (100), the fixing member comprising a screw block (114) rotatably connected to the chair back (100), and a rubber block (115) connected to the screw block (114) and for extending into the adjustment channel (111), the rubber block (115) being used to press against the adjustment column (112) for fixing.

2. The adjustable chair back support structure according to claim 1, characterized in that: One end of the rubber block (115) away from the screw block (114) has a threaded column (116) threadedly connected to the other side of the adjustment channel (111).

3. The adjustable chair back support structure according to claim 2, characterized in that: The adjusting column (112) has a long hole (113) arranged along the sliding direction, and the threaded column (116) passes through the long hole (113).

4. The adjustable chair back support structure according to claim 3, characterized in that: The chair back (100) is provided with a circular accommodating groove (117) for the rubber block (115) to be embedded.

5. The adjustable chair back support structure according to claim 4, characterized in that: The threaded column (116) is provided with a sliding block (130) located in the long hole (113), and elastic members are provided on both sides of the sliding block (130). The inner wall of the long hole (113) has a plurality of continuous limiting holes (120) along the extension direction for the elastic members to be embedded.

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