Office chair with liftable backrest

Abstract

The utility model discloses an office chair with a liftable backrest. The office chair comprises a chair body, the chair has the advantages that the limiting clamping plate and the limiting clamping groove are arranged, the limiting clamping plate is matched with the limiting clamping groove in one side of the adjusting sliding block, the position of the adjusting sliding block on the inner side of the fixing supporting box is limited, the adjusting sliding block can be conveniently adjusted, and the chair is convenient to use. Moving positions of an adjusting sliding block and a waist rest are limited, the position of the waist rest is convenient to adjust, the waist is supported through the waist rest, and a top fixing plate, threaded holes and limiting bolts are arranged, so that the limiting bolts are mounted in the different threaded holes in a threaded mode, and the practicability is high. The limiting bolt is matched with the limiting side hole formed in one side of the sliding supporting plate in a limiting mode, the position of the sliding supporting plate on the side fixing support is limited, the positions of the supporting piece and the headrest are adjusted, and the head of a person using the chair body is supported through the headrest.

Description

TECHNICAL FIELD

[0001] The utility model relates to office chair technical field, concretely is office chair of backrest liftable. BACKGROUND

[0002] Office chair is designed for office scene, is used for the daily sitting posture work of office personnel, satisfies the sitting posture demand of office personnel under long time crouching work, meeting, computer operation etc. scene, guarantees work efficiency and comfort, but the backrest height of part office chair is fixed, can not be adjusted according to the height and sitting posture habit of user, the position of waist rest is also often not adjustable, leading to the waist and back can not be fully supported. SUMMARY

[0003] The utility model discloses a kind of office chairs of backrest liftable, to solve the problem that the backrest height of part office chair in the above background technology is fixed, can not be adjusted according to the height and sitting posture habit of user, the position of waist rest is also often not adjustable, leading to the waist and back can not be fully supported.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of office chairs of backrest liftable, including:

[0005] Chair body;

[0006] Supporting side frame, supporting side frame is arranged at one side of chair body;

[0007] Fixed support, fixed support is arranged at one side of supporting side frame, one side of the fixed support is symmetrically fixedly connected with guide rail, limit sliding block is slidably arranged on the guide rail;

[0008] Adjusting support plate, adjusting support plate is arranged at one side of limit sliding block;

[0009] Backrest, backrest is arranged at one side of adjusting support plate;

[0010] Fixed support box, fixed support box is fixedly connected at one side of adjusting support plate, adjusting sliding block is slidably arranged in the fixed support box;

[0011] Waist rest, waist rest is arranged at one side of adjusting sliding block;

[0012] Side fixed support, side fixed support is fixedly connected at one side of adjusting support plate, sliding support plate is slidably arranged in the top of side fixed support;

[0013] Supporting piece, supporting piece is fixedly connected in the top of sliding support plate, headrest is fixedly connected in one side of the supporting piece;

[0014] The limit clamping groove is equidistantly arranged on one side of the adjusting sliding block, and the fixed side box is fixedly connected with a fixed side box, and the limit clamping plate is slidably arranged in the fixed side box and matched with the limit clamping groove.

[0015] As a preferred scheme of the utility model, the top of the side fixed support is symmetrically fixed with a top fixed plate, a plurality of threaded holes are equidistantly arranged in the inside of the top fixed plate, a limit bolt is screw-mounted in the inside of the threaded hole, and a limit side hole matched with the limit bolt is arranged on the outside of the sliding support plate.

[0016] As a preferred scheme of the utility model, the limit clamping plate is fixedly connected with a pull rod on one side, the pull rod is slidably connected with the fixed side box, springs are symmetrically arranged in the inside of the fixed side box, and one end of the spring is fixedly connected with the limit clamping plate.

[0017] As a preferred scheme of the utility model, the inside of the fixed support is provided with an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected with an adjusting block, the adjusting block is slidably connected with the fixed support, and one side of the adjusting block is fixedly connected with the adjusting support plate.

[0018] As a preferred scheme of the utility model, the inside of the sliding support plate is symmetrically slidably provided with a limit rod, and the limit rod is fixedly connected with the side fixed support.

[0019] As a preferred scheme of the utility model, the bottom of the chair body is provided with a storage battery, one side of the chair body is provided with a controller, and the electric telescopic rod and the storage battery are electrically connected with the controller.

[0020] Compared with the prior art, the utility model has the advantages that the limit clamping plate and the limit clamping groove are arranged, the position of the adjusting sliding block on the inside of the fixed support box is limited through the cooperation of the limit clamping plate and the limit clamping groove on one side of the adjusting sliding block, the moving position of the adjusting sliding block and the waist support is limited, the position of the waist support is conveniently adjusted, the waist is supported through the waist support, the top fixed plate, the threaded hole and the limit bolt are arranged, the limit bolt is screw-mounted in different threaded holes, the position of the sliding support plate on the side fixed support is limited through the limit cooperation of the limit bolt and the limit side hole arranged on one side of the sliding support plate, the position of the supporting piece and the headrest is adjusted, and the head is supported through the headrest. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is an overall structural schematic view of the utility model;

[0022] Figure 2 It is a rear view of the utility model;

[0023] Figure 3The utility model discloses a side fixed support structure schematic diagram shows that the utility model discloses a fixed side box internal structure schematic diagram shows that the utility model discloses a fixed support internal structure schematic diagram shows.

[0024] Figure 4 The utility model discloses a fixed side box internal structure schematic diagram shows that the utility model discloses a fixed support internal structure schematic diagram shows.

[0025] Figure 5 The utility model discloses a fixed support internal structure schematic diagram shows.

[0026] In the drawing: 1, chair body;2, support side frame;3, fixed support;4, limit sliding block;5, guide rail;6, adjusting support plate;7, backrest;8, fixed support box;9, adjusting sliding block;10, fixed side box;11, limit clamping plate;12, spring;13, pull rod;14, limit clamping groove;15, waist rest;16, adjusting block;17, electric telescopic rod;18, side fixed support;19, sliding support plate;20, support piece;21, headrest;22, limit rod;23, top fixed plate;24, screw hole;25, limit bolt;26, limit side hole;27, battery;28, controller. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be apparently and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range of protection of the utility model.

[0028] Please refer to Figures 1 to 5 The utility model provides a technical scheme: an office chair with liftable backrest, which comprises: a chair body 1;Support side frame 2 fixedly connected to one side of the chair body 1;Fixed support 3 fixedly connected to one side of the support side frame 2, one side of the fixed support 3 is symmetrically fixedly connected with guide rail 5, and limit sliding block 4 is arranged on the guide rail 5 and slides;Adjusting support plate 6 is fixedly connected to one side of the limit sliding block 4;Backrest 7 is fixedly connected to one side of the adjusting support plate 6;Fixed support box 8 is fixedly connected to one side of the adjusting support plate 6, and adjusting sliding block 9 is arranged in the fixed support box 8 and slides;Waist rest 15 is fixedly connected to one side of the adjusting sliding block 9;Side fixed support 18 is fixedly connected to one side of the adjusting support plate 6, and sliding support plate 19 is arranged on the top of the side fixed support 18 and slides;Support piece 20 is fixedly connected to the top of the sliding support plate 19, and headrest 21 is fixedly connected to one side of the support piece 20;Limit clamping groove 14 is equidistantly arranged on one side of the adjusting sliding block 9, one side of the fixed support box 8 is fixedly connected with fixed side box 10, and limit clamping plate 11 matched with the limit clamping groove 14 is arranged in the fixed side box 10 and slides.

[0029] It should be noted that in the embodiment, when the overall height position of the backrest 7, the lumbar support 15 and the headrest 21 is adjusted, the output end of the electric telescopic rod 17 drives the adjusting block 16 to adjust the height position, the adjusting block 16 drives the adjusting support plate 6 to adjust the height position, the adjusting support plate 6 drives the limiting sliding block 4 to slide on the guide rail 5, the overall height position of the backrest 7, the lumbar support 15 and the headrest 21 is adjusted by the adjusting support plate 6, the limiting bolt 25 is rotated outward to limit the position between the limiting side hole 26 on one side of the sliding support plate 19, at this time, the sliding support plate 19 can be adjusted to slide on the side fixing support 18, the overall position of the sliding support plate 19, the supporting piece 20 and the headrest 21 is adjusted, the limiting bolt 25 is screwed with the threaded hole 24 at the appropriate position to limit the position of the sliding support plate 19 after moving, the position of the headrest 21 is adjusted, the limiting clamping plate 11 is moved into the fixed side box 10 by pulling the pull rod 13 outward, the limiting clamping plate 11 is separated from the limiting clamping groove 14, at this time, the extension position of the lumbar support 15 and the adjusting sliding block 9 can be adjusted, the pull rod 13 is loosened after adjustment, at this time, the spring 12 is reset and drives the limiting clamping plate 11 to reset, the limiting clamping plate 11 is fixed with the limiting clamping groove 14 on one side of the adjusting sliding block 9, and the position of the lumbar support 15 is adjusted. The chair body 1 mainly comprises the following main components: casters for realizing the moving function of the chair body 1; chair legs (five-star legs): used in combination with the casters and selected to be pneumatically lifted; air rods: used for adjusting the height of the office chair; bottom plates: connecting the air rods and the chair seat; chair seat: composed of a wooden board, a sponge and a fabric; backrest 7: providing back support; armrests: providing arm support and increasing comfort; lumbar support 15: used for supporting the waist and improving the comfort of the sitting posture; headrest 21: located at the upper part of the backrest 7 and used for supporting the head to improve the comfort of the sitting posture.

[0030] In one embodiment, as shown in Figure 1 , Figure 2 , Figure 3 and Figure 5 , the top of the side fixing support 18 is symmetrically fixed with a top fixing plate 23, a plurality of threaded holes 24 are equidistantly formed in the inside of the top fixing plate 23, the limiting bolt 25 is screwed in the inside of the threaded hole 24, and the outside of the sliding support plate 19 is provided with a limiting side hole 26 matched with the limiting bolt 25.

[0031] It should be noted that in the embodiment, the limiting bolt 25 is screwed in the threaded holes 24 at different positions, which is convenient for limiting the position of the sliding support plate 19 after moving by matching with the limiting side hole 26 on one side of the sliding support plate 19.

[0032] In one embodiment, as shown in Figure 1 and Figure 4As shown, one side of the limiting clamping plate 11 is fixedly connected with a pull rod 13, the pull rod 13 is in sliding connection with the fixed side box 10, and the inside of the fixed side box 10 is symmetrically provided with a spring 12, one end of the spring 12 is fixedly connected with the limiting clamping plate 11.

[0033] It should be noted that in the embodiment, the limiting clamping plate 11 is pulled by the pull rod 13, and the spring 12 is pressed when the limiting clamping plate 11 moves in the fixed side box 10. After the pull rod 13 is released, the spring 12 will reset, and the spring 12 drives the limiting clamping plate 11 to reset and move.

[0034] In one embodiment, as shown in Figure 5 As shown, the inside of the fixed support 3 is installed with an electric telescopic rod 17, the output end of the electric telescopic rod 17 is fixedly connected with an adjusting block 16, the adjusting block 16 is in sliding connection with the fixed support 3, and one side of the adjusting block 16 is fixedly connected with the adjusting support plate 6.

[0035] It should be noted that in the embodiment, the output end of the electric telescopic rod 17 drives the adjusting block 16 to slide and adjust in the fixed support 3, and the adjusting block 16 drives the adjusting support plate 6, the backrest 7, the lumbar support 15 and the headrest 21 to be adjusted in overall height position.

[0036] In one embodiment, as shown in Figure 2 and Figure 3 As shown, the inside of the sliding support plate 19 is symmetrically provided with a limiting rod 22 in sliding manner, and the limiting rod 22 is fixedly connected with the side fixed support 18.

[0037] It should be noted that in the embodiment, when the sliding support plate 19 is adjusted on the side fixed support 18, the sliding support plate 19 is limited to slide on the outside of the limiting rod 22, so that the moving position of the sliding support plate 19, the support 20 and the headrest 21 can be limited, and the stability of the adjustment is improved.

[0038] In one embodiment, as shown in Figure 1 and Figure 5 As shown, the bottom of the chair body 1 is installed with a storage battery 27, one side of the chair body 1 is installed with a controller 28, and the electric telescopic rod 17 and the storage battery 27 are electrically connected with the controller 28.

[0039] It should be noted that in the embodiment, the storage battery 27 is used for power supply, and the controller 28 is convenient for controlling the electric telescopic rod 17.

[0040] In the description of the utility model, need understanding is, the term "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, with a particular orientation structure and operation, therefore cannot be understood as a restriction on the utility model.

[0041] In addition, the terms "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, therefore, the features limited by "first", "second", "third", "fourth" can be explicitly or implicitly include at least one of the features.

[0042] In the utility model, unless otherwise expressly provided and limited, the terms "installation", "arrangement", "connection", "fixing", "screw connection" and so on should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrated, can be mechanically connected, can also be electrically connected, can be directly connected, can also be indirectly connected through intermediate medium, can be the communication or interaction relationship between two elements, unless otherwise expressly limited, for ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0043] Although the embodiments of the utility model have been shown and described, for ordinary skilled in the art, it can be understood that the embodiments can be changed, modified, replaced and changed in various ways without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. A backrest liftable office chair, characterized in that, Include: Chair body (1); Support side frame (2) is arranged on one side of chair body (1); Fixed support (3) is arranged on one side of support side frame (2), one side of the fixed support (3) is symmetrically fixedly connected with guide rail (5), and limit sliding block (4) is arranged on the guide rail (5) in sliding mode; Adjusting support plate (6) is arranged on one side of limit sliding block (4); Backrest (7) is arranged on one side of adjusting support plate (6); Fixed support box (8) is fixedly connected on one side of adjusting support plate (6), and adjusting sliding block (9) is arranged in sliding mode in the fixed support box (8); Waist rest (15) is arranged on one side of adjusting sliding block (9); Side fixed support (18) is fixedly connected on one side of adjusting support plate (6), and sliding support plate (19) is arranged in sliding mode on the top of the side fixed support (18); Support (20) is fixedly connected on the top of sliding support plate (19), and headrest (21) is fixedly connected on one side of the support (20); Limiting clamping groove (14) is equidistantly arranged on one side of adjusting sliding block (9), one side of the fixed support box (8) is fixedly connected with fixed side box (10), and limiting clamping plate (11) matched with limiting clamping groove (14) is arranged in sliding mode in the fixed side box (10).

2. An office chair with a backrest that is adjustable in height according to claim 1, characterized in that: The top of the side fixed support (18) is symmetrically fixedly connected with top fixed plate (23), a plurality of threaded holes (24) are equidistantly arranged in the inside of the top fixed plate (23), limiting bolts (25) are screw mounted in the inside of the threaded holes (24), and limiting side holes (26) matched with the limiting bolts (25) are arranged on the outside of the sliding support plate (19).

3. An office chair with a backrest that is adjustable in height according to claim 1, characterized in that: One side of the limiting clamping plate (11) is fixedly connected with pull rod (13), the pull rod (13) is in sliding connection with the fixed side box (10), springs (12) are symmetrically arranged in the inside of the fixed side box (10), and one end of the spring (12) is fixedly connected with the limiting clamping plate (11).

4. The chair of claim 1, wherein: The inside of the fixed support (3) is provided with electric telescopic rod (17), the output end of the electric telescopic rod (17) is fixedly connected with adjusting block (16), the adjusting block (16) is in sliding connection with the fixed support (3), and one side of the adjusting block (16) is fixedly connected with the adjusting support plate (6).

5. The chair of claim 1, wherein: The inside of the sliding support plate (19) is symmetrically provided with limiting rod (22), and the limiting rod (22) is fixedly connected with the side fixed support (18).

6. An office chair with a backrest that is adjustable in height according to claim 4, characterized in that: The bottom of the chair body (1) is provided with battery (27), one side of the chair body (1) is provided with controller (28), and the electric telescopic rod (17) and the battery (27) are electrically connected with the controller (28).

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