Simple backrest frame of office chair

Abstract

The utility model discloses a simple backrest frame of office chair, including backrest frame and waist support, backrest frame is frame body, the middle part of frame body is provided with hollow groove, the middle part of frame body is provided with cross bar, the cross section of frame body in the height direction protrudes forward from both ends towards the middle part, waist support is installed on the cross bar through positioning base, and the cross bar is provided with the positioning base. The waist support is provided with a strip-shaped groove formed in the height direction, and the front end of the positioning base can slide in the height direction of the strip-shaped groove. The waist support is provided with a hollow hole. The two sides of the rope body can be wrapped through the protruding arrangement of the frame body, meanwhile, the human body imitating radian of the waist is achieved, and then the arc-shaped supporting effect is improved. Meanwhile, the supporting degree and the structural strength of the backrest frame are improved through the arrangement of the cross rod, meanwhile, the waist support is convenient to install and fix, the size of the positioning base is small, meanwhile, height adjustment of the waist support is achieved, and therefore supporting to the lumbar vertebra is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to office chair field, especially an office chair simple backrest frame. BACKGROUND

[0002] Chair refers to various chairs equipped for work convenience in daily work and social activities. With human body design for sitting posture, ergonomic chair also comes into being, which provides bionic support for positions such as lumbar vertebrae or cervical vertebrae of human body, thereby reducing load of human body, thereby improving comfort, and avoiding sub-health problems caused by bad sitting posture.

[0003] For example, Chinese patent CN202322993703.6 is a solid waist support structure, but in actual use, for example, the southern region of China is relatively hot, the solid waist support structure often has the problem of poor air permeability leading to sweating;

[0004] Of course, there are also some waist supports with hollow structures, but their supporting property is poor, which affects the use experience, so how to improve the supporting property of the waist support while avoiding heat accumulation in the waist support part is the key to the design. CONTENT OF THE UTILITY MODEL

[0005] The main purpose of the utility model is to provide an office chair simple backrest frame, which aims to solve the above technical problems, make the waist support easy to install on the backrest, the structure has good support, and the problem of heat accumulation is avoided, and the aesthetic degree is high.

[0006] To achieve the above purpose, the utility model provides an office chair simple backrest frame, which comprises,

[0007] The backrest frame is a frame body, the middle part of the frame body is a hollow groove, and the middle part of the frame body is provided with a horizontal rod,

[0008] The height direction cross section of the frame body is provided with a front convex part from both ends to the middle part;

[0009] The waist support is installed on the horizontal rod through a positioning base, the waist support is provided with a strip-shaped groove arranged in the height direction, the front end of the positioning base can slide in the height direction of the strip-shaped groove, and the rear wall of the strip-shaped groove away from the positioning base is provided with a concave-convex block;

[0010] The waist support is provided with a hollow hole.

[0011] The convex setting of the frame body can provide the covering of the two sides of the rope body, and at the same time, the human body curvature of the waist part is realized, and the arc support effect is improved; at the same time, the setting of the horizontal rod improves the support degree and the structural strength of the backrest frame, and facilitates the installation and fixation of the waist support, and the size of the positioning base is small, and the height adjustment of the waist support is realized, and the support of the lumbar vertebrae is improved; the front wall of the waist support is abutted with the net-shaped part, and therefore better heat dissipation can be provided. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 For the explosion of the utility model Figure 1 ;

[0013] Figure 2 For the explosion of the utility model Figure 2 ;

[0014] Figure 3 For the cross section of the utility model Figure 1 ;

[0015] Figure 4 For the cross section of the utility model Figure 2 ;

[0016] Figure 5 For the three-dimensional schematic view of the utility model.

[0017] In the drawings,

[0018] 1 is a backrest frame, 11 is a horizontal rod, 12 is a convex part,

[0019] 2 is a waist support, 21 is a front support, 22 is a rear support, 23 is a hollow cavity, 20 is a hollow hole,

[0020] 3 is a positioning base, 30 is a strip-shaped groove, 31 is a guide sliding part, 32 is a stepped groove, 33 is a limiting seat,

[0021] 41 is a threaded stud, 42 is an insertion groove,

[0022] 5 is a concave-convex block. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings. 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 those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0024] It should be noted that if the embodiments of the utility model have directionality indication (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial), the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), if the specific posture changes, the directionality indication also changes accordingly.

[0025] In addition, if the embodiments of the utility model have the description of "first" or "second", etc., the description of "first" or "second" is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0026] As shown in Figures 1 to 5 An office chair simple backrest frame, comprising,

[0027] The backrest frame 1 is a frame body, the middle part of the frame body is a hollow slot, the middle part of the frame body is provided with a horizontal rod 11,

[0028] The height direction cross section of the frame body is provided with a protrusion from both ends to the middle part;

[0029] The waist support 2 is installed on the horizontal rod 11 through the positioning base 3, the waist support 2 is provided with a strip-shaped slot 30 arranged in the height direction, the front end of the positioning base 3 can slide in the height direction of the strip-shaped slot 30, and the rear wall of the strip-shaped slot away from the positioning base is provided with a concave-convex block;

[0030] The waist support 2 is provided with a hollow hole 20.

[0031] The protrusion of the frame body can provide the cladding of the two sides of the rope body, at the same time, the human body arc of the waist is realized, and the arc support effect is improved. At the same time, the setting of the horizontal rod 11 improves the support degree and the structural strength of the backrest frame 1, and facilitates the installation and fixation of the waist support 2. The size of the positioning base 3 is small, and the height adjustment of the waist support 2 is realized, and the support to the lumbar vertebrae is improved. The front wall of the waist support 2 abuts against the mesh part, so that good heat dissipation can be provided.

[0032] Specifically, the lower part of the frame body is provided with a convex part 12, and the horizontal rod 11 is arranged between the two convex parts 12, so that the arc support is improved.

[0033] In the embodiment of the utility model, the cross rod 11 is arc shape, and extend from both sides to the back arc shape, further improve the fit between the waist and lumbar vertebra, can provide more support to the waist, namely the back has the sense of sinking.

[0034] Specifically, the waist support 2 is arc shape, the upper wall and the lower wall of the waist support 2 extend to the inside arc shape, further improve the fit with the waist.

[0035] In the embodiment of the utility model, the waist support 2 includes the back support 22 and the front support 21 installed to the back support 22, the hollow hole 20 is equipped with the front support 21, the hollow cavity is enclosed between the front support 21 and the back support 22, the strip-shaped slot 30 is equipped with the position of the back support 22, wherein the front support 21 and the back support 22 can hide the adjusting structure in it, at the same time, the hollow cavity can effectively avoid the heat accumulation of the waist, provide more comfortable support while improving the air permeability, avoid the insufficient supporting force caused by the thinness of the existing waist support 2.

[0036] Specifically, the front support 21 is equipped with a plurality of rearward extending studs 41, the stud is equipped with a first threaded hole, the back support 22 is equipped with a first threaded via hole matched with the first threaded hole, and the installation between the front support 21 and the back support 22 is facilitated, in the specific structure, the back support 22 can be provided with a first plug-in slot to position and install the stud.

[0037] In the embodiment of the utility model, the back support 22 is equipped with a first plug-in slot 42, and the stud extends into the first plug-in slot.

[0038] Specifically, the positioning base 3 is equipped with a second threaded hole, the cross rod 11 is equipped with a second threaded via hole matched with the second threaded hole, a second screw rod passes through the second threaded via hole and is screwed in the second threaded hole, and the installation and fixation of the positioning base 3 are realized, wherein the rear wall of the cross rod 11 is equipped with a decorative cover.

[0039] In the embodiment of the utility model, the positioning base 3 is equipped with a guide sliding part 31 matched with the guide groove, the front wall of the back support 22 is equipped with a stepped groove 32, the guide sliding part 31 passes through the stepped groove 32 and is connected with a limiting seat 33, the rear wall of the limiting seat is abutted with the concave-convex block 5, and the damping adjustment setting of the waist support 2 is realized, the waist support 2 is fixed at the predetermined height, and the fit with the waist is improved.

[0040] Specifically, the limiting seat is screw connected with the guide sliding part 31.

[0041] The above merely describes preferred embodiments of the present application, and is not intended to limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields under the inventive concept of the present application, as described in the present application specification and drawings, is included in the patent protection scope of the present application.

Claims

1. An office chair simple backrest frame, characterized in that, The utility model relates to a backrest frame, which comprises a frame body, a hollow slot in the middle of the frame body, a horizontal rod arranged in the middle of the frame body, The height direction cross section of the frame body is convexly arranged from both ends to the middle; A waist support is installed on the horizontal rod through a positioning base, the waist support is provided with a strip-shaped slot arranged in the height direction, the front end of the positioning base can slide in the height direction of the strip-shaped slot, and the rear wall of the strip-shaped slot away from the positioning base is provided with a concave-convex block; The waist support is provided with a hollow hole. The frame body is provided with a convex part in the lower part, and the horizontal rod is arranged between the two convex parts.

2. The office chair simple backrest frame of claim 1, wherein: The horizontal rod is in an arc shape and extends in an arc shape rearward from both sides.

3. The office chair simple backrest frame of claim 1, wherein: The waist support is in an arc shape, and the upper wall and the lower wall of the waist support extend in an arc shape inward.

4. The office chair simple backrest frame of claim 1, wherein: The waist support comprises a rear support and a front support installed on the rear support, the hollow hole is provided with the front support, a hollow cavity is formed between the front support and the rear support, and the strip-shaped slot is arranged at the position of the rear support.

5. The office chair simple backrest frame of claim 1, wherein: The front support is provided with a plurality of rearward extending studs, the studs are provided with first threaded holes, the rear support is provided with first threaded vias matched with the first threaded holes.

6. The office chair simple backrest frame of claim 5, wherein: The rear support is provided with a first plug-in slot, and the studs extend into the first plug-in slot.

7. The office chair simple backrest frame of claim 6, wherein: The positioning base is provided with a second threaded hole, the horizontal rod is provided with a second threaded via matched with the second threaded hole, a second screw rod passes through the second threaded via and is screwed to the second threaded hole.

8. The office chair simple backrest frame of claim 6, wherein: The positioning base is provided with a guide sliding part matched with a guide slot, the front wall of the rear support is provided with a stepped slot, the guide sliding part is connected with a limiting seat after passing through the stepped slot, and the rear wall of the limiting seat abuts against the concave-convex block.

9. The office chair simple backrest frame of claim 6, wherein: The limiting seat and the guide sliding part are screw-connected.

10. The office chair simple backrest frame of claim 9, wherein: ​

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