Lifting type seat waist rest

Abstract

The utility model discloses a lifting type seat waist rest, which relates to the related technical field of office chairs and comprises a waist rest body, a mounting frame is arranged at the rear end of the waist rest body, a seat body is arranged at the bottom end of the mounting frame, a fixing frame is arranged on the right side of the waist rest body, and a fixing block is arranged on the outer side of the fixing frame. A lifting mechanism used for adjusting the waist rest body is arranged in the fixing frame. According to the lifting type seat waist rest, the shape of a groove position on the inner side of a limiting clamping groove deflects outwards, a reset spring on the left side of a limiting block is stressed, the length of the reset spring is shortened, and meanwhile, a mounting block arranged at the rear end of the limiting block slides in a mounting groove, so that the limiting block is automatically clamped and locked with the limiting clamping groove at a proper position; therefore, when the height of the waist rest body is adjusted in a lifting mode, self-locking can be achieved, the operation that a bolt needs to be manually and repeatedly screwed for fixing is avoided, and the overall lifting adjustment can be more convenient and faster.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical fields of office chair, specifically to a lifting type seat waist support. BACKGROUND

[0002] The waist support is a seat accessory designed to provide waist support and can be adjusted in height according to individual needs. The support surface of the waist support is usually made of soft and elastic materials such as memory foam, latex or high-density foam. These materials can conform to the waist curve and provide comfortable support. However, the height of the traditional seat waist support cannot be adjusted flexibly during use, which makes it difficult for the seat waist support to adapt to people of different heights during use, resulting in low applicability of the seat waist support during use.

[0003] To overcome the above-mentioned defects, the prior art (Chinese patent with publication number CN213550742U and publication date 2021-06-29) discloses a lifting type waist support structure, which comprises: a waist support member detachably mounted on a chair backrest; a waist support back cover plate slidingly arranged on the waist support member and capable of sliding up and down along the waist support member; and a soft cushion covering the waist support back cover plate. An office chair comprising the above-mentioned lifting type waist support structure is also disclosed. The lifting type waist support structure can adjust the height to adapt to different body sizes of the user, improving the comfort of the seat.

[0004] The above-mentioned mechanism fixes the position of the waist support by using a bolt passing through the waist support member and other structures. When adjusting the height, the bolt and other structures need to be repeatedly screwed, making the overall adjustment process more complicated. In addition, the use of a bolt for height adjustment requires the use of a tool, otherwise the screwing will not be tight enough, causing the waist support to loosen in the future, and thus the overall adjustment process is inefficient. SUMMARY

[0005] The utility model aims to provide a lifting type seat waist support to solve the problem of low applicability of the seat waist support during use due to the difficulty in adjusting the height of the traditional seat waist support during use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a liftable lumbar support for a seat, comprising a lumbar support body, a mounting frame at the rear end of the lumbar support body, and a seat body at the bottom end of the mounting frame; a fixing frame on the right side of the lumbar support body, and a decorative cover on the outer side of the fixing frame; a connecting frame on the inner side of the mounting frame, and the connecting frame is connected to the lumbar support body via a fixing block; the decorative cover and the connecting frame are slidably connected; a lifting mechanism for adjusting the lumbar support body is provided inside the fixing frame; the lifting mechanism includes a limiting slot, which is located inside the fixing frame; a rotating block is provided inside the fixing block, and a limiting groove matching the limiting slot is sleeved on the outer side of the rotating block; a positioning block is provided at the upper end of the rear end of the lumbar support body, and a protective mechanism for reducing dirt on the surface of the lumbar support body is provided on the outer side of the lumbar support body.

[0007] Furthermore, a limiting block is provided on the inner side of the fixing block, and a return spring is provided on the left side of the limiting block. The side of the return spring is connected to the inner side of the fixing frame. The limiting block and the fixing frame form an elastic structure through the return spring.

[0008] Furthermore, an installation block is provided at the upper end of the rear end of the limiting block, and an installation groove matching the installation block is provided at the upper end of the fixing block.

[0009] Furthermore, the sides of the limiting slot are chamfered, and the sides of the limiting block are also chamfered, and the limiting block and the limiting slot engage with each other.

[0010] Furthermore, the protective mechanism includes a protective sleeve, which is fitted over the outside of the lumbar support body. A positioning block is engaged at the upper end of the rear end of the protective sleeve, and a positioning groove matching the positioning block is provided at the upper end of the rear end of the lumbar support body.

[0011] Furthermore, a connecting spring is wound around the outside of the positioning block, and the positioning block and the protective sleeve form an elastic structure through the connecting spring.

[0012] Furthermore, the positioning block has a T-shaped cross-section and extends through the protective sleeve into the interior of the lumbar support body.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By moving the waist rest body upwards and moving the limiting clamping groove, the limiting block is extruded when the limiting clamping groove moves upwards, and is deflected outward due to the shape of the slot inside the limiting clamping groove, the reset spring on the left side of the limiting block is stressed and shortened in length, and the mounting block arranged at the rear end of the limiting block slides inside the mounting slot, so that the limiting block is automatically clamped and locked between the limiting clamping groove with appropriate position, so that the waist rest body can be self-locked when the height is adjusted, avoiding the operation of manually rotating the bolt repeatedly to fix, so that the overall height adjustment is more convenient.

[0015] Further, the inner side of the limiting clamping groove is provided with four slots, and the waist rest body can be adjusted in four gears when used, so that the waist rest body can adapt to different height of the user, and the comfort of the waist rest body when used is higher.

[0016] Further, when the waist rest body is adjusted in height, the limiting block is continuously deflected in left and right angles through the sliding connection between the mounting block and the mounting slot, and the limiting block is reset in angle through the elastic force of the reset spring after angle deflection, so that the limiting block can be flexibly self-locked, and the applicability when used is increased.

[0017] 2. By clamping between the positioning block and the positioning slot, the protective sleeve can be sleeved and fixed outside the waist rest body, when the protective sleeve is dirty, the protective sleeve can be separately disassembled and cleaned, avoiding the problem that the waist rest body is dirty and affecting the overall service life of the seat body.

[0018] Further, the elastic force of the connecting spring can assist the reset of the positioning block in position, so that the positioning block can be automatically reset and clamped and positioned with the positioning slot when repeatedly pulled, and the stability when used is increased. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic view of the connection structure of the seat and the waist rest of the utility model.

[0020] Figure 2 It is a schematic view of the rear view structure of the waist rest of the utility model.

[0021] Figure 3 It is a schematic view of the explosion structure of the waist rest of the utility model.

[0022] Figure 4 It is a schematic view of the rear view structure of the waist rest of the utility model.

[0023] Figure 5 It is a schematic view of the side view structure of the utility model.

[0024] Figure 6This is a rear sectional view of the lumbar support of this utility model.

[0025] In the diagram: 1. Lumbar support body; 2. Mounting bracket; 3. Seat body; 4. Fixing bracket; 5. Fixing block; 6. Decorative cover; 7. Connecting bracket; 8. Rotating block; 9. Limiting groove; 10. Limiting block; 11. Limiting slot; 12. Return spring; 13. Mounting block; 14. Mounting groove; 15. Positioning block; 16. Positioning groove; 17. Connecting spring; 18. Protective cover. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Example 1: As Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6 The technical solution shown addresses the problem that traditional lumbar supports are not easily adjustable in height, making them unsuitable for users of different heights and resulting in low usability. This adjustable lumbar support discloses a lifting mechanism, including a lumbar support body 1, a mounting bracket 2 at the rear end of the lumbar support body 1, a seat body 3 at the bottom end of the mounting bracket 2, a fixing bracket 4 on the right side of the lumbar support body 1, a decorative cover 6 on the outer side of the fixing bracket 4, and a connecting bracket 7 on the inner side of the mounting bracket 2. The connecting bracket 7 is internally connected to the lumbar support body 1 via a fixing block 5. The decorative cover 6 and the connecting bracket 7 are slidably connected, and the fixing bracket 4 has internal mechanisms for adjusting the lumbar support body 1. The lifting mechanism includes a limiting slot 11, which is located inside the fixed frame 4. A rotating block 8 is located inside the fixed block 5, and a limiting groove 9 matching the limiting slot 11 is fitted around the rotating block 8. A limiting block 10 is located inside the fixed block 5, and a return spring 12 is located on the left side of the limiting block 10. The side of the return spring 12 is connected to the inside of the fixed frame 4. The limiting block 10 and the fixed frame 4 form an elastic structure through the return spring 12. An installation block 13 is located at the upper end of the rear end of the limiting block 10, and an installation groove 14 matching the installation block 13 is opened at the upper end of the fixed block 5. The sides of the limiting slot 11 and the limiting block 10 are chamfered, and the limiting block 10 and the limiting slot 11 are engaged with each other.

[0028] In this case, the connecting frame 7 is installed on the front end of the mounting frame 2 through the fixing part, and when the height of the lumbar body 1 needs to be adjusted, the lumbar body 1 is moved upward, so that the lumbar body 1 drives the fixed frame 4 and the decorative cover 6 to move upward synchronously, the slider provided on the front end of the connecting frame 7 slides in the sliding groove on the rear end of the decorative cover 6, the limiting block 10 is extruded when moving upward, and is deflected outward due to the shape of the slot on the inner side of the limiting slot 11, the reset spring 12 on the left side of the limiting block 10 is stressed and shortened in length, and the mounting block 13 provided on the rear end of the limiting block 10 slides in the mounting slot 14, and the lower end of the limiting block 10 is rotatably connected between the rotating block 8 and the fixed block 5, so that the limiting block 10 can be automatically clamped and locked between the appropriate limiting slot 11 when the lumbar body 1 is moved upward, thereby achieving self-locking when the height of the lumbar body 1 is adjusted, avoiding the need for manual repeated screwing of the bolt for fixing, and making the overall height adjustment more convenient; four slots are provided on the inner side of the limiting slot 11, and the lumbar body 1 can be adjusted in four gears when being used, thereby making the lumbar body 1 suitable for people of different heights, and making the comfort of the lumbar body 1 higher when being used; when the height of the lumbar body 1 is adjusted, the limiting block 10 is continuously deflected in left and right angles through the sliding connection between the mounting block 13 and the mounting slot 14, and the limiting block 10 is reset in angle through the elastic force of the reset spring 12 after the angle deflection, thereby making the limiting block 10 flexibly achieve self-locking and increasing the applicability when being used.

[0029] Embodiment two: as shown in the technical scheme of Figure 1 , Figure 2 , Figure 3 and Figure 5 , in order to solve the problem that the surface of the lumbar body 1 is easily dirty after long time use, affecting the use experience: the height-adjustable seat backrest discloses a protection mechanism, the upper end of the rear end of the lumbar body 1 is provided with a positioning block 15, and the outer part of the lumbar body 1 is provided with a protection mechanism for reducing the dirt on the surface of the lumbar body 1; the protection mechanism comprises a protective sleeve 18, and the protective sleeve 18 is sleeved on the outer part of the lumbar body 1, the upper end of the rear end of the protective sleeve 18 is clamped and connected with the positioning block 15, and the upper end of the rear end of the lumbar body 1 is provided with a positioning groove 16 matched with the positioning block 15; the outer side of the positioning block 15 is wound with a connecting spring 17, and the positioning block 15 and the protective sleeve 18 form an elastic structure through the connecting spring 17; the cross section of the positioning block 15 is T-shaped, and the positioning block 15 penetrates through the protective sleeve 18 and extends to the inside of the lumbar body 1.

[0030] In the example, the outer surface of the lumbar body 1 is prone to dirt after long-term use, so by the engagement between the positioning block 15 and the positioning groove 16, the protective sleeve 18 can be sleeved and fixed outside the lumbar body 1, when the protective sleeve 18 is dirty, the protective sleeve 18 can be individually disassembled and cleaned, thereby avoiding the problem that the dirt of the lumbar body 1 affects the overall service life of the seat body 3; the elastic force of the connecting spring 17 can assist the resetting of the position of the positioning block 15, thereby enabling the positioning block 15 to be automatically reset and engaged and limited by the positioning groove 16 during repeated pulling, thereby increasing the stability during use.

[0031] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A lifting type seat waist rest, comprising a waist rest body (1), a mounting frame (2) arranged at the rear end of the waist rest body (1), a seat body (3) arranged at the bottom end of the mounting frame (2), a fixing frame (4) arranged at the right side of the waist rest body (1), a decorative cover (6) arranged at the outer side of the fixing frame (4), a connecting frame (7) arranged at the inner side of the mounting frame (2), and the connecting frame (7) is connected with the waist rest body (1) through a fixing block (5); characterized in that the decorative cover (6) and the connecting frame (7) are in sliding connection, the inner side of the fixing frame (4) is provided with a lifting mechanism for adjusting the waist rest body (1), the lifting mechanism comprises a limiting clamping groove (11) arranged in the inner side of the fixing frame (4), the inner side of the fixing block (5) is provided with a rotating block (8), and the outer side of the rotating block (8) is sleeved with a limiting groove (9) matched with the limiting clamping groove (11); the upper end of the rear end of the waist rest body (1) is provided with a positioning block (15), and the outer side of the waist rest body (1) is provided with a protection mechanism for reducing the surface dirt of the waist rest body (1).

2. The lift seat lumbar of claim 1, wherein: the inner side of the fixing block (5) is provided with a limiting block (10), the left side of the limiting block (10) is provided with a return spring (12), the side edge of the return spring (12) is connected with the inner side of the fixing frame (4), and the limiting block (10) and the fixing frame (4) constitute an elastic structure through the return spring (12).

3. A lifting seat lumbar support according to claim 2, wherein: the upper end of the rear end of the limiting block (10) is provided with a mounting block (13), and the upper end of the fixing block (5) is provided with a mounting groove (14) matched with the mounting block (13).

4. A lifting seat lumbar support according to claim 3, wherein: the side edge of the limiting clamping groove (11) is provided with a chamfer, and the side edge of the limiting block (10) is provided with a chamfer, and the limiting block (10) and the limiting clamping groove (11) are clamped with each other.

5. The lift seat lumbar of claim 1, wherein: the protection mechanism comprises a protective sleeve (18), the protective sleeve (18) is sleeved on the outer side of the waist rest body (1), the upper end of the rear end of the protective sleeve (18) is clamped and connected with the positioning block (15), and the upper end of the rear end of the waist rest body (1) is provided with a positioning groove (16) matched with the positioning block (15).

6. A lifting seat lumbar support according to claim 5, wherein: the outer side of the positioning block (15) is wound with a connecting spring (17), and the positioning block (15) and the protective sleeve (18) constitute an elastic structure through the connecting spring (17).

7. A lifting seat lumbar support according to claim 6, wherein: the cross section of the positioning block (15) is T-shaped, and the positioning block (15) passes through the protective sleeve (18) and extends to the inside of the waist rest body (1).

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