Chair back with adjustable waist rest

Abstract

The chair back with the adjustable waist rest comprises a chair back body and the waist rest, the waist rest comprises a middle plate and two side plates, the middle plate is installed on the chair back body in a vertically adjustable mode, the two side plates are located on the two opposite sides of the middle plate respectively, the two side plates are arranged on the middle plate in a sliding mode, and the waist rest is arranged on the middle plate. And a fixing piece for positioning the two side plates is fixedly arranged on the middle plate. The device has the advantage that the waist of people with different heights and weights can be conveniently supported.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of seat accessory design, especially to a chair back with adjustable waist rest. BACKGROUND

[0002] The chair back is the core part of the whole chair, which is used to support the whole back, shoulder and waist of the human body. When sitting for a long time, the waist of the human body is easy to be tired, which brings adverse effects.

[0003] In the prior art, as disclosed in the utility model with publication number CN207341499U and the name of chair back structure, it comprises a support, an upper rest pad connected to the upper side of the support, a lower rest pad connected to the lower side of the upper rest pad, and an elastic connecting piece for connecting the upper rest pad and the lower rest pad, the upper rest pad is provided with a lower rest pad connecting seat, the lower rest pad is provided with an upper rest pad connecting seat, the upper end of the elastic connecting piece is locked on the lower rest pad connecting seat of the upper rest pad, and the lower end of the elastic connecting piece is locked on the upper rest pad connecting seat of the lower rest pad.

[0004] The above-mentioned chair back cannot be freely adjusted in the actual use process, which leads to the fact that the waist of the user of different height and body shape cannot obtain comfortable support, and the use experience is affected. UTILITY MODEL CONTENT

[0005] In view of the deficiencies in the prior art, the utility model provides a chair back with adjustable waist rest, which is used to solve the technical problem that the waist support of the existing chair back cannot be freely adjusted, which affects the use experience.

[0006] The above technical purpose of the utility model is realized through the following technical scheme:

[0007] A chair back with adjustable waist rest comprises a chair back body and a waist rest, the waist rest comprises a middle plate and two side plates, the middle plate is vertically adjustable and mounted on the chair back body, the two side plates are located on the opposite sides of the middle plate, the two side plates are slidably arranged on the middle plate, and the middle plate is fixedly provided with a fixing piece for positioning the two side plates.

[0008] The utility model is further provided as follows: the fixing piece comprises two fixing blocks and two elastic fixing heads, the two fixing blocks are fixedly arranged on the middle plate, the two fixing heads are fixedly arranged on the two fixing blocks respectively, and the two fixing heads are respectively used for positioning the two side plates.

[0009] The utility model further sets up: the intermediate plate is provided with the sliding slot on the horizontal direction, the intermediate plate is provided with the sliding hole with the sliding slot intercommunication on the both sides of sliding slot, two the side plate all is solidly connected with the sliding block, two the sliding block is respectively through two sliding holes and is arranged in the sliding groove, two the sliding block all is provided with a plurality of clamping groove, two the fixed head is respectively with one of the clamping groove on two sliding blocks abuts.

[0010] The utility model further sets up: the chair back body is solidly connected with the mounting block, the mounting block is provided with the mounting groove on the vertical direction, the side wall of mounting groove is equipped with a plurality of convex that sets up in the wave vertical direction, the connecting block is arranged in the mounting groove, the connecting block is equipped with the positioning piece that abuts with a plurality of convex and is used for positioning connecting block, the intermediate plate is installed in the side of connecting block away from the mounting block.

[0011] The utility model further sets up: the positioning piece includes the locating block and the locating spring, the connecting block is provided with the locating slot and the fixed slot with the locating slot intercommunication, the locating block is located in the locating slot, the one end of locating block stretches into the fixed slot, the locating spring is located in the locating slot and is respectively with the locating slot side wall and the locating block side wall solidly connected, the other end side wall of locating block is solidly connected with the abutment, the abutment stretches into the mounting slot and abuts between two convex.

[0012] The utility model further sets up: the intermediate plate is rotatably connected with one side of connecting block, the intermediate plate is rotatably connected with connecting block still solidly connected with buffer spring.

[0013] The utility model further sets up: the intermediate plate and two the side plate away from the side of chair back body are all covered with the lumbar pillow.

[0014] Compared with the prior art, the beneficial effects are as follows:

[0015] The device is a chair back with adjustable lumbar support, mainly used for installation on a seat for use, providing support for the back and waist of the person when sitting. The intermediate plate and the two side plates can effectively provide support for the waist of the person, the vertically adjustable intermediate plate can effectively adjust and support people of different heights, and the two sliding side plates can further support the waist of people of different body types, improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses an overall structure schematic diagram of the embodiment;

[0017] Figure 2 The utility model discloses an overall structure explosion schematic diagram of the embodiment;

[0018] Figure 3is an enlarged schematic view of the structure at A of Figure 2

[0019] Figure 4 is a schematic view of the overall structure of one of the side plates;

[0020] Figure 5 is an enlarged schematic view of the structure at B of Figure 2

[0021] Figure 6 is a schematic view of the connecting structure of the connecting block and the positioning member;

[0022] Figure 7 is an overall structure explosion schematic view of another perspective of the present application.

[0023] In the above drawings: 1, chair back body; 2, middle plate; 3, side plate; 4, fixed block; 5, fixed head; 6, sliding groove; 7, sliding hole; 8, sliding block; 9, clamping groove; 10, mounting block; 11, mounting groove; 12, protrusion; 13, connecting block; 14, positioning block; 15, positioning spring; 16, positioning groove; 17, fixed groove; 18, abutting head; 19, buffer spring; 20, lumbar support. DETAILED DESCRIPTION

[0024] The technical solutions in the present application will be further described below in combination with the drawings and examples.

[0025] Example:

[0026] Referring to Figures 1-7 , the present application is a chair back with adjustable lumbar support, comprising a chair back body 1 and a lumbar support, such as Figure 2 , Figure 5 and Figure 6 ​​The waist rest comprises a middle plate 2 and two side plates 3, the middle plate 2 and the two side plates 3 are provided with a waist pillow 20 on the side away from the back body 1, the back body 1 is provided with a mounting block 10, the mounting block 10 is provided with a vertical mounting slot 11, the side wall of the mounting slot 11 is provided with a plurality of convexes 12 arranged in a wave shape, the mounting slot 11 is slidably provided with a connecting block 13, the connecting block 13 is provided with a positioning member for abutting against the plurality of convexes 12 and positioning the connecting block 13, the positioning member comprises a positioning block 14 and a positioning spring 15, the connecting block 13 is provided with a positioning slot 16 and a fixing slot 17 communicating with the positioning slot 16, the positioning block 14 is arranged in the positioning slot 16, one end of the positioning block 14 extends into the fixing slot 17, the end of the positioning block 14 extending into the fixing slot 17 is arc-shaped, the positioning block 14 rotates in the positioning slot 16 with the end in the fixing slot 17 as the pivot during height adjustment, the positioning spring 15 is arranged in the positioning slot 16 and fixedly connected with the side wall of the positioning slot 16 and the side wall of the positioning block 14, the other end of the positioning block 14 is fixedly provided with an abutting head 18, the abutting head 18 extends into the mounting slot 11 and abuts between two convexes 12. In this way, the abutting head 18 on the positioning block 14 abuts against the two convexes 12 to fix the connecting block 13, the abutting head 18 continuously abuts and positions through the positioning spring 15, and the positioning block 14 and the abutting head 18 are reset in time after adjustment.

[0027] As shown in Figure 7 , the middle plate 2 is rotationally connected with the connecting block 13 away from the mounting block 10, and the middle plate 2 and the connecting block 13 are further fixedly provided with a buffer spring 19. In this way, the adjustment of the overall waist rest is realized through the connection of the middle block and the connecting block 13, and the buffer spring 19 provides a certain buffer force when a person leans against it, so that the overall waist rest continuously fits the waist of the person.

[0028] As shown in Figure 2 , Figure 3 and Figure 4As shown, two side plates 3 are respectively located on opposite sides of the middle plate 2, and the middle plate 2 is fixed with fixing members for positioning the two side plates 3. The fixing members include two fixing blocks 4 and two fixing heads 5, the two fixing blocks 4 are fixed on the middle plate 2, the two fixing heads 5 are respectively fixed on the two fixing blocks 4, the two fixing heads 5 are respectively used for positioning the two side plates 3, the middle plate 2 is transversely provided with a sliding groove 6, the middle plate 2 is provided with a sliding hole 7 on both sides of the sliding groove 6 and in communication with the sliding groove 6, the two side plates 3 are respectively provided with a sliding block 8, the two sliding blocks 8 are respectively arranged in the sliding groove 6 through the two sliding holes 7, the two sliding blocks 8 are respectively provided with a plurality of clamping grooves 9, and the two fixing heads 5 are respectively in abutment with one of the clamping grooves 9 on the two sliding blocks 8, and the fixing head 5 is a plastic member with elasticity. In this way, the two side plates can be moved away from or close to each other on the middle plate 2 through the sliding of the sliding blocks 8 in the sliding groove 6, and the positioning of the side plate 3 is realized through the abutment of the fixing head 5 on the fixing block 4 and one of the clamping grooves 9 on the sliding block 8.

[0029] Working principle:

[0030] In use, first, the height of the waist rest is adjusted according to the height of the person, the positioning block 14 in the positioning groove 16 on the connecting block 13 is moved by moving the middle plate 2, the abutment head 18 on the positioning block 14 is moved along the plurality of convexities 12 in the wave shape, when the height is adjusted to the appropriate height, the abutment head 18 is abutted between two convexities 12 by the positioning spring 15, and is fixed, then the two side plates 3 are pulled according to the body shape of the person, the sliding blocks 8 on the two side plates 3 are slid in the sliding groove 6, after the adjustment is completed, the positioning of the side plate 3 is completed through the abutment of the fixing head 5 and one of the clamping grooves 9, and then the person can use the leaning.

[0031] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced, without departing from the purpose and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A chair back with an adjustable lumbar support comprising a chair back body (1) and a lumbar support, characterized in that: The lumbar support comprises a middle plate (2) vertically adjustable mounted on the back body (1) and two side plates (3) respectively located on the opposite sides of the middle plate (2), the two side plates (3) are slidably arranged on the middle plate (2), and a fixing member is fixedly arranged on the middle plate (2) and used for positioning the two side plates (3).

2. A chair back with an adjustable lumbar support as claimed in claim 1 wherein: The fixing member comprises two fixing blocks (4) and two elastic fixing heads (5), the two fixing blocks (4) are fixedly arranged on the middle plate (2), and the two fixing heads (5) are respectively fixedly arranged on the two fixing blocks (4) and used for positioning the two side plates (3).

3. A chair back with an adjustable lumbar support as claimed in claim 2 wherein: A sliding groove (6) is horizontally arranged on the middle plate (2), a sliding hole (7) in communication with the sliding groove (6) is arranged on the middle plate (2) and on the two sides of the sliding groove (6), and a sliding block (8) is fixedly arranged on each of the two side plates (3), the two sliding blocks (8) respectively pass through the two sliding holes (7) and are slidably arranged in the sliding groove (6), a plurality of clamping grooves (9) are arranged on the two sliding blocks (8), and the two fixing heads (5) respectively abut against one of the clamping grooves (9) on the two sliding blocks (8).

4. The chair back with an adjustable lumbar support according to claim 1, wherein: The back body (1) is fixedly provided with a mounting block (10), a vertical mounting groove (11) is arranged on the mounting block (10), a plurality of protrusions (12) arranged in a wave shape in the vertical direction are arranged on the side wall of the mounting groove (11), a connecting block (13) is slidably arranged in the mounting groove (11), the connecting block (13) is provided with a positioning member abutting against the plurality of protrusions (12) and used for positioning the connecting block (13), and the middle plate (2) is mounted on the side of the connecting block (13) away from the mounting block (10).

5. A chair back with an adjustable lumbar support as claimed in claim 4 wherein: The positioning member comprises a positioning block (14) and a positioning spring (15), a positioning groove (16) and a fixing groove (17) in communication with the positioning groove (16) are arranged on the connecting block (13), the positioning block (14) is arranged in the positioning groove (16), one end of the positioning block (14) extends into the fixing groove (17), the positioning spring (15) is arranged in the positioning groove (16) and fixedly connected with the side wall of the positioning groove (16) and the side wall of the positioning block (14), respectively, and a abutting head (18) is fixedly arranged on the other end side wall of the positioning block (14), the abutting head (18) extends into the mounting groove (11) and abuts between two of the protrusions (12).

6. A chair back with an adjustable lumbar support as claimed in claim 4 wherein: The middle plate (2) is rotationally connected to one side of the connecting block (13), and a buffer spring (19) is further fixedly arranged between the middle plate (2) and the connecting block (13).

7. The chair back with an adjustable lumbar support according to claim 1, wherein: The middle plate (2) and the two side plates (3) are respectively wrapped with a lumbar pillow (20) on the side away from the back body (1).

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