Staff chair with adjustable seat surface depth

Abstract

The utility model relates to the technical field of staff chairs, discloses a staff chair with adjustable seat surface depth, and solves the problems that the existing staff chair lacks a waist support structure when a person sits straightly, and after the staff work for a long time in the same sitting posture, the lumbar muscles are in a tension state for a long time. The staff chair with the adjustable seat surface depth comprises a base, a first electric push rod and a mounting plate, a seat cushion assembly is arranged at the top end of the mounting plate, a first supporting frame is fixedly connected to the outer surface of the mounting plate, a back plate is fixedly connected to the top end of the first supporting frame, a back cushion is movably connected to the inner side of the back plate, and a back cushion assembly is arranged on the inner side of the back cushion. When a user sits on the back cushion, the first spring is in a compressed state at the moment, the back cushion is attached to the waist of the user at any time under the action of the first spring, good waist support is provided, the natural curve of the lumbar vertebra can be maintained, and discomfort and fatigue of the waist caused by long-time sitting are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of staff chairs, in particular to a staff chair with an adjustable seat depth. Background Art

[0002] A staff chair is a type of chair designed specifically for use in office spaces, also known as an office chair or office chair. This type of chair is designed to provide comfort and support for long periods of sitting to meet the comfort and ergonomic requirements required for working in an office environment.

[0003] However, existing staff chairs lack a lumbar support structure when people sit upright. If employees maintain the same sitting posture for a long time, their lumbar muscles will be in a tense state for a long time, which can easily lead to lumbar muscle strain, manifested as symptoms such as low back pain and stiffness. Utility Model Content

[0004] The utility model aims to provide a staff chair with an adjustable seat depth. By adopting the device for working, the problem that the existing staff chair lacks a lumbar support structure when a person sits upright and the lumbar muscles of employees are in a tense state for a long time after maintaining the same sitting posture for a long time is solved.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a staff chair with adjustable seat depth, comprising a base, a first electric push rod fixedly connected to the top of the base, and a mounting plate fixedly connected to the telescopic end of the first electric push rod, a seat cushion assembly for adjusting the seat depth is arranged on the top of the mounting plate, a first support frame is fixedly connected to the outer surface of the mounting plate, a back plate is fixedly connected to the top of the first support frame, a back pad is movably connected to the inner side of the back plate, and a cushion assembly for improving the comfort of the back is arranged on the inner side of the back pad;

[0006] The cushion assembly includes a fixing plate movably connected to the inner side of the back cushion, a fixing block fixedly connected to one end of the fixing plate, an inserting block slidably connected to the inside of the fixing block, a locking bolt threadedly connected between the inserting block and the back plate, a first spring fixedly connected to the other end of the fixing block, and a cushion fixedly connected to one end of the first spring, wherein the fixing block movably passes through the back plate and the back cushion.

[0007] Furthermore, the seat cushion assembly includes a seat cushion mounting base fixedly connected to the top of the mounting plate, a groove opened on the upper surface of the seat cushion mounting base, a second electric push rod fixedly connected to the bottom end of the inner wall of the groove, a seat cushion body fixedly connected to the telescopic end of the second electric push rod, and a second spring fixedly connected between the seat cushion body and the bottom end of the inner wall of the groove.

[0008] Furthermore, a second support frame is fixedly connected to the outer surface of the mounting plate, and a handrail is fixedly connected to the top end of the second support frame.

[0009] Furthermore, a support block is movably connected to the outer surface of the first electric push rod, a third support frame is fixedly connected to the outer surface of the support block, and a foot board is fixedly connected to the bottom end of the third support frame.

[0010] Furthermore, a fourth support frame is fixedly connected to the outer surface of the base, and a universal wheel is movably connected to the bottom end of the fourth support frame.

[0011] Furthermore, the cushion is a component made of memory foam material.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] The utility model proposes a staff chair with an adjustable seat depth. When a person leans back, the person contacts the back cushion. At this time, the first spring is in a compressed state. Under the action of the first spring, the back cushion fits the person's waist at any time, providing good waist support, helping to maintain the natural curve of the lumbar spine, and reducing waist discomfort and fatigue caused by sitting for a long time. The utility model solves the problem that the existing staff chair lacks a waist support structure when the person sits upright, and the lumbar muscles will be in a tense state for a long time after the employee maintains the same sitting posture for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 3 It is a schematic diagram of the second support frame and the fourth support frame of the utility model;

[0017] Figure 4 The structure of the cushion assembly of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 5 The structure of the cushion assembly of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 6 This is a schematic diagram of the structure of the seat cushion assembly of the present utility model.

[0020] In the figure: 1, base; 11, fourth support frame; 111, universal wheel; 2, first electric push rod; 3, mounting plate; 4, second support frame; 41, armrest; 5, first support frame; 51, back plate; 511, back cushion; 6, cushion assembly; 61, fixing plate; 62, fixing block; 63, plug block; 64, locking bolt; 65, first spring; 66, cushion; 7, support block; 71, third support frame; 711, footrest; 8, cushion assembly; 81, mounting seat; 82, groove; 83, second electric push rod; 84, cushion body; 85, second spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings.

[0023] Combination Figure 1-Figure 2 A staff chair with adjustable seat depth comprises a base 1, a first electric push rod 2 fixedly connected to the top of the base 1, and a mounting plate 3 fixedly connected to the telescopic end of the first electric push rod 2, a seat cushion assembly 8 for adjusting the seat depth is arranged on the top of the mounting plate 3, a first support frame 5 is fixedly connected to the outer surface of the mounting plate 3, a back plate 51 is fixedly connected to the top of the first support frame 5, a back pad 511 is movably connected to the inner side of the back plate 51, and a cushion assembly 6 for improving the comfort of the back is arranged on the inner side of the back pad 511.

[0024] The utility model is further described below in conjunction with embodiments.

[0025] Embodiment 1:

[0026] See also Figure 1-Figure 6The back cushion assembly 6 includes a fixing plate 61 movably connected to the inner side of the back cushion 511, a fixing block 62 fixedly connected to one end of the fixing plate 61, an insert block 63 slidably connected to the inside of the fixing block 62, a locking bolt 64 threadedly connected between the insert block 63 and the back plate 51, a first spring 65 fixedly connected to the other end of the fixing block 62, and a back cushion 66 fixedly connected to one end of the first spring 65. The fixing block 62 movably penetrates the back plate 51 and the back cushion 511. In the initial state, the fixing block 62 penetrates the back plate 51 and the back cushion 511, the insert block 63 is slidably connected to the inside of the fixing block 62, and the insert block 63 is locked by locking The bolt 64 is threadedly connected to the back plate 51, so the fixing plate 61 and the cushion 66 are fixed to the inner side of the back cushion 511 under the action of the insert block 63. When a person leans back, he / she contacts the cushion 66. At this time, the first spring 65 is in a compressed state. Under the action of the first spring 65, the cushion 66 fits the person's waist at any time, providing good waist support, helping to maintain the natural curve of the lumbar spine, and reducing waist discomfort and fatigue caused by sitting for a long time. When it is necessary to remove the cushion 66, the locking bolt 64 is removed, and the insert block 63 is separated from the fixing block 62, so as to facilitate the separation of the fixing block 62 from the back plate 51 to remove the cushion 66.

[0027] The seat cushion assembly 8 includes a seat cushion mounting base 81 fixedly connected to the top of the mounting plate 3, a groove 82 opened on the upper surface of the seat cushion mounting base 81, a second electric push rod 83 fixedly connected to the bottom end of the inner wall of the groove 82, a seat cushion body 84 fixedly connected to the telescopic end of the second electric push rod 83, and a second spring 85 fixedly connected between the seat cushion body 84 and the bottom end of the inner wall of the groove 82. The second electric push rod 83 is telescopic to drive the seat cushion body 84 to move up and down. At this time, the second spring 85 is telescopic and retracted with the seat cushion body 84 moving up and down. The up and down movement of the seat cushion body 84 is convenient for adjusting the depth of the seat surface, so that users can find the most comfortable sitting posture according to their height, body shape and preferences.

[0028] A second support frame 4 is fixedly connected to the outer surface of the mounting plate 3, and an armrest 41 is fixedly connected to the top of the second support frame 4. The armrest 41 is convenient for providing additional support to help the user maintain balance and stability when sitting down or standing up, reduce the risk of accidental falls, and help improve the user's sitting comfort and usage experience.

[0029] The outer surface of the first electric push rod 2 is movably connected with a support block 7, the outer surface of the support block 7 is fixedly connected with a third support frame 71, and the bottom end of the third support frame 71 is fixedly connected with a footrest 711. The footrest 711 is convenient for supporting the legs, allowing the legs to relax and reducing leg discomfort caused by sitting for a long time.

[0030] A fourth support frame 11 is fixedly connected to the outer surface of the base 1, and a universal wheel 111 is movably connected to the bottom end of the fourth support frame 11. The universal wheel 111 allows the chair to slide freely on the ground, helping the user to easily adjust the sitting posture or position, conveniently move to the required position, and improve work efficiency.

[0031] The back cushion 66 is a component made of a memory foam material. The memory foam has memory properties and is convenient for providing personalized support according to a person's body shape and posture. The memory foam material usually has a soft and comfortable touch and can provide long-lasting comfortable support, making people feel more comfortable.

[0032] When in use, start the first electric push rod 2, and the first electric push rod 2 is extended and retracted to drive the mounting plate 3 to move up and down, so as to adjust the height of the entire chair. In the initial state, the fixing block 62 passes through the back plate 51 and the back cushion 511, and the insert block 63 is slidably connected to the inside of the fixing block 62, and the insert block 63 is threadedly connected to the back plate 51 through the locking bolt 64. Therefore, under the action of the insert block 63, the fixing plate 61 and the back cushion 66 are fixed to the inner side of the back cushion 511. When a person leans back, he / she contacts the back cushion 66. At this time, the first spring 65 is in a compressed state. Under the action of the first spring 65, the back cushion 66 fits the person's waist at any time, providing good waist support, helping to maintain the natural curve of the lumbar spine, and reducing waist discomfort and fatigue caused by sitting for a long time. 6, remove the locking bolt 64, separate the insert block 63 from the fixing block 62, so as to facilitate the separation of the fixing block 62 from the back plate 51 to remove the cushion 66, start the second electric push rod 83, and the second electric push rod 83 retracts and contracts to drive the seat cushion body 84 to move up and down. At this time, the second spring 85 retracts and contracts as the seat cushion body 84 moves up and down. The up and down movement of the seat cushion body 84 facilitates the adjustment of the depth of the seat surface, so that users can find the most comfortable sitting posture according to their height, body shape and preferences. The footrest 711 facilitates the support of the legs, allowing the legs to relax and reduce the leg discomfort caused by sitting for a long time. Under the action of the universal wheel 111, it is easy for the chair to slide freely on the ground, helping employees to easily adjust their sitting posture or position, and conveniently move to the required position to improve work efficiency.

[0033] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A staff chair with adjustable seat depth, comprising a base (1), a first electric push rod (2) fixedly connected to the top of the base (1), and a mounting plate (3) fixedly connected to the telescopic end of the first electric push rod (2), characterized in that: A seat cushion assembly (8) for adjusting the seat depth is arranged at the top of the mounting plate (3); a first support frame (5) is fixedly connected to the outer surface of the mounting plate (3); a back plate (51) is fixedly connected to the top of the first support frame (5); a back pad (511) is movably connected to the inner side of the back plate (51); and a cushion assembly (6) for improving the comfort of the back is arranged on the inner side of the back pad (511); The cushion assembly (6) comprises a fixing plate (61) movably connected to the inner side of the back cushion (511), a fixing block (62) fixedly connected to one end of the fixing plate (61), an insert block (63) slidably connected to the inside of the fixing block (62), a locking bolt (64) threadedly connected between the insert block (63) and the back plate (51), a first spring (65) fixedly connected to the other end of the fixing block (62), and a cushion (66) fixedly connected to one end of the first spring (65), wherein the fixing block (62) movably passes through the back plate (51) and the back cushion (511).

2. The staff chair with adjustable seat depth according to claim 1, characterized in that: The seat cushion assembly (8) comprises a seat cushion mounting seat (81) fixedly connected to the top end of the mounting plate (3), a groove (82) provided on the upper surface of the seat cushion mounting seat (81), a second electric push rod (83) fixedly connected to the bottom end of the inner wall of the groove (82), a seat cushion body (84) fixedly connected to the telescopic end of the second electric push rod (83), and a second spring (85) fixedly connected between the seat cushion body (84) and the bottom end of the inner wall of the groove (82).

3. The staff chair with adjustable seat depth according to claim 1, characterized in that: The outer surface of the mounting plate (3) is fixedly connected to a second support frame (4), and the top end of the second support frame (4) is fixedly connected to a handrail (41).

4. The staff chair with adjustable seat depth according to claim 1, characterized in that: The outer surface of the first electric push rod (2) is movably connected to a support block (7), the outer surface of the support block (7) is fixedly connected to a third support frame (71), and the bottom end of the third support frame (71) is fixedly connected to a foot support plate (711).

5. The staff chair with adjustable seat depth according to claim 1, characterized in that: The outer surface of the base (1) is fixedly connected to a fourth support frame (11), and the bottom end of the fourth support frame (11) is movably connected to a universal wheel (111).

6. The staff chair with adjustable seat depth according to claim 1, characterized in that: The back cushion (66) is a component made of memory foam material.

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