Adjustable lumbar support

Abstract

The utility model relates to the field of office and household furniture, in particular to a device for providing back support for the waist. The adjustable lumbar support device comprises a frame, an adjusting device and a stop block. The frame is composed of a vertical plate and a horizontal plate which are connected with each other, holes are formed in the vertical plate and the horizontal plate, the vertical plate and the horizontal plate can be fixed to the frame of the chair back through screws, a groove is further formed, and the adjusting device can move along the groove. The adjusting device is composed of a sliding block capable of moving along the groove and a wing-shaped screw capable of providing locking pressure for the chair back. The stop block is composed of two arc-shaped plates which intersect with each other, a hole for installing a screw cap and a plug are arranged at the junction of the arc-shaped plates, and the screw cap is placed in the plug. Holes are formed in the two ends of the stop block, the clamp moves by rotating the screw, and the belt is tensioned.

Description

Technical Field

[0001] The utility model relates to the field of office and household furniture, namely a device for creating comfort and preventing musculoskeletal system diseases when working at a computer for a long time. Background Art

[0002] A lumbar support device for mounting on a seat back is known (RU 20289, IPC A47C 7 / 46, B60N2 / 00, published on October 27, 2001), comprising a seat cushion and a member for fixing the seat cushion to the upholstered seat back. The seat cushion is inflatable and has an independent inflation device.

[0003] The disadvantage is that the adjustment range of position and support level is relatively small.

[0004] A chair is known (RU 29641, IPC A47B 39 / 00, A47B 39 / 10, A47B 39 / 12, published on May 27, 2003), comprising a seat and its support, with a movable stop on the backrest, mainly for the lumbar spine (lordosis), which is different in that it is equipped with a parallelogram mechanism connecting the stop block to the backrest of the chair, and the stop block can be vertically adjusted in the lordosis area according to the correct "sitting" position for a specific person, the stop device is fixed to the upper axis of the parallelogram mechanism by means of a wheel yoke rigidly connected thereto, and the stop device inclination angle adjuster and its movement limiter are provided in a groove on one side of the parallelogram mechanism.

[0005] The disadvantage is that during vertical adjustment, the stop can only be installed in certain places (the periphery of the circular sector). Utility Model Content

[0006] The technical task of the utility model is to create a lumbar support which can be installed on a backrest frame and provides a wide range of position adjustment.

[0007] The result of this technology is that the user's back fits evenly against the chair back, providing support for the lower back.

[0008] This invention addresses this problem and achieves a technical result: an adjustable lumbar support comprising a frame consisting of two horizontally arranged side panels, two vertically arranged outer panels, and two vertically arranged inner panels. The inner panels have grooves, and an adjustment device consisting of a slider, a thumbscrew, a screw, and a rivet nut. The device also includes a stopper. The adjustment device is moved by moving the screw in the groove of the inner panel and rotating the thumbscrew, and is fixed relative to the inner panel by pressing the inner panel against a washer when the screw is tightened. The stopper consists of a curved metal plate, a plug, a clip, a screw, and a strap.

[0009] According to the utility model, when the screw is rotated, the tension of the belt can be adjusted by adjusting the position of the clip.

[0010] According to the utility model, the frame can be fixed on the frame of the chair back through the threaded connection through hole.

[0011] According to the utility model, the adjusting device can adjust the position of the stop block relative to the backrest cushion by rotating the thumb screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a general view of the lumbar support;

[0013] Figure 2 is a cross-sectional view of the lumbar support;

[0014] Figure 3 This is the overall view of the chair. DETAILED DESCRIPTION

[0015] The essence of the present invention is illustrated by the accompanying drawings of a specific embodiment of an adjustable lumbar support, wherein Figure 1 、 Figure 2 They are the overall view and cross-sectional view of the lumbar support. Figure 3 This is the overall view of the chair.

[0016] The adjustable lumbar support consists of a frame 1, which is composed of two horizontally arranged plates 2, two vertically arranged outer plates 3, and two vertically arranged inner plates 4. All plates are connected by welded joints. The inner plates 4 have grooves along which the adjustment mechanism 5 moves together with the stopper 6. The adjustment mechanism 5 consists of a slider 7, a thumbscrew 8, and a rivet nut 9. The slider 7 is composed of a U-shaped plate 10, a nut 11, a washer 12, and a screw 13. The stopper 6 consists of a curved metal plate 14, a plug 15, a clip 16, a screw 17, and a strap 18.

[0017] A screw connection is used at the connection between the frame 1 and the slider 7, so that the inner plate 4 can be pressed against the washer 12 while tightening the screw 13, thereby fixing the position of the stop block 6.

[0018] By rotating the clip 16 relative to the screw 17, the position of the belt 18 can be secured, thereby ensuring an even fit of the belt to the chair back.

[0019] The necessary position of the stop block 6 can be ensured by adjusting the thumb screw 8 and the nut 11 in combination.

[0020] Therefore, the present invention provides a reliable adjustable lumbar support, can be installed on a back frame with a soft cushion, and provides a wide range of position adjustment.

Claims

1. Adjustable lumbar support, characterized by, The invention comprises a frame consisting of two horizontally arranged side panels, two vertically arranged outer panels and two vertically arranged inner panels, the inner panels having grooves, and an adjustment device consisting of a slider, a thumb screw, a screw and a rivet nut, and further comprising a stop block, wherein the adjustment device is moved by moving the screw in the groove of the inner panel and rotating the thumb screw, and is fixed relative to the inner panel by pressing the inner panel against the washer when the screw is tightened, and the stop block is composed of a curved metal plate, a plug, a clamp, a screw and a strap.

2. The adjustable lumbar support according to claim 1, characterized in that As the screw is turned, the tension of the belt can be adjusted by adjusting the position of the clip.

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