Adjustable lumbar support

Abstract

The utility model relates to the field of office and home furniture, namely a device for providing back support in the lumbar region. [Solution] The adjustable lumbar support includes a frame, an adjustment unit, and a stopper. The frame consists of interconnected vertical and horizontal plates with holes for fastening to the chair back frame with screws and a groove along which the adjustment unit moves. The adjustment unit consists of a carriage that provides movement along the groove and a screw ram that provides pressure for the stopper against the back. The stopper consists of two intersecting curved plates with holes at their joints into which screw caps are attached, and a plug into which the screw caps are placed. The stopper plates have holes at the ends through which screws are turned to move clamps and apply tension to the belt.

Description

[Technical Field]

[0001] The utility model relates to the field of office and home furniture, namely a device for creating comfort during long hours of work at a computer and preventing musculoskeletal disorders. [Background technology]

[0002] A known lumbar support suitable for attachment to a seat back (Russian Patent RU20289, IPC A47C 7 / 46, B60N 2 / 00, published 27 October 2001) comprises a pillow part and an element for fastening the pillow part to the upholstered seat back. The pillow part is inflatable and is provided with an autonomous inflation device.

[0003] The drawback is that the adjustment range for the position and degree of back lift is narrow.

[0004] A known chair (Russian Patent RU29641, IPC A47B 39 / 00, A47B 39 / 10, A47B 39 / 12, published May 27, 2003, Patent Document 2) including a seat and seat support and a back with a movable stop mainly for the lumbar spine (lordosis) is characterized in that it has a parallelogram mechanism connecting the stop to the back of the chair, the stop being fixed to the upper axis of the parallelogram mechanism by a pad rigidly connected to the parallelogram mechanism, but being vertically adjustable in the lordosis zone according to the position of the correct "sitting" posture of a particular person, and the chair is further characterized in that it has an adjuster for the tilt angle of the stop and a limiter for the movement of the stop located in a groove on one side of the parallelogram mechanism.

[0005] The drawback is that the stops may be attached to a strictly specific location (circumferential sector) during vertical adjustment. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Russian Utility Model No. RU20289 [Patent Document 2] Russian Utility Model No. RU29641 Summary of the Invention [Problem to be solved by the invention]

[0007] The technical problem of the utility model is to create a lumbar support that can be attached to a back frame and that can provide a wide range of position adjustment.

[0008] The technical result is to provide support for the lower back by allowing the user's back to conform evenly to the back of the chair. [Means for solving the problem]

[0009] What solves this problem and achieves a technical result is an adjustable lumbar support that includes a frame with a groove along which a lumbar stopper position adjustment unit can be moved and fixed in a specific position, and in which tension can be applied to the elastic belt by turning a screw. [Effects of the Invention]

[0010] According to the utility model, the frame can be fastened to the frame of the chair back by means of threaded connection through-holes.

[0011] According to the utility model, the adjustment unit makes it possible to adjust the position of the stopper relative to the upholstery of the backrest by rotating a screw ram.

[0012] The essence of the utility model is illustrated by the drawings of specific examples of embodiments of an adjustable lumbar support. [Brief explanation of the drawings]

[0013] [Figure 1]1 shows the lumbar support with a cross-sectional view of the adjustment unit. [Figure 2] A full view of the chair is shown. DETAILED DESCRIPTION OF THE INVENTION

[0014] The adjustable lumbar support includes a frame 1 consisting 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. Plates 4 have grooves along which adjustment units 5 move together with stops 6. Adjustment units 5 consist of carriages 7, screw wings 8, and rivet nuts 9. Carriage 7 consists of U-shaped plates 10, nuts 11, washers 12, and screws 13. Stops 6 consist of curved metal plates 14, plugs 15, clamps 16, screws 17, and belts 18.

[0015] The use of a screw connection for the connection between the frame 1 and the carriage 7 makes it possible to fix the position of the stopper 6 by pressing the plate 4 against the washer 12 while tightening the screw 13 .

[0016] By allowing clip 16 to rotate relative to screw 17, the position of belt 18 can be secured to ensure a uniform fit to the back of the chair.

[0017] The combination of adjustability by means of the screw wings 8 and the nuts 11 makes it possible to ensure the required position of the stopper 6 .

[0018] Thus, the claimed utility model presents a reliable adjustable lumbar support that can be attached to a back frame with soft padding and that provides a wide range of positioning adjustment. [Explanation of symbols]

[0019] 1 frame 2 Horizontally arranged boards 3 Vertically arranged outer boards 4 Vertically arranged inner boards 5 Adjustment Unit 6 Stopper 7 Carriage 8 Screw Wing 9 rivet nuts 10 U-shaped board 11 Nut 12 Washers 13 Screws 14 Curved Metal Plate 15 Plug 16 Clamp 17 screws 18 Belt

Claims

1. 1. An adjustable lumbar support comprising a frame having two horizontally disposed side plates, two vertically disposed outer plates, and two vertically disposed inner plates, the inner plates having grooves, together with an adjustment unit comprising a carriage, screw wings, screws, and rivet nuts, and additionally comprising a stopper, wherein the adjustment unit is configured to move by moving the screw in the groove of the inner plate and by rotating the screw wings, and the adjustment unit is further configured to be fixed relative to the inner plate by pressing the inner plate against the washer when the screw is tightened, and the stopper is further configured to be a curved metal plate, a plug, a clamp, a screw, and a belt.

2. 10. The adjustable lumbar support of claim 1, An adjustable lumbar support, characterized in that the position of the clip can be adjusted when the screw is rotated to create tension in the belt.

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