Chair back frame structure

Abstract

The utility model provides a chair back frame structure. The chair back frame structure comprises a backrest part, a headrest part and a waist support part, the headrest part comprises a headrest connecting seat connected with the backrest part and a headrest body mounted on the headrest connecting seat; the waist support part comprises a waist support connecting seat connected with the backrest part and a waist support body mounted on the waist support connecting seat; the headrest body is installed on the headrest connecting seat in a lifting mode to adjust the height of the headrest, the waist support body is installed on the waist support connecting seat in a lifting mode to adjust the height of the waist support, and therefore the height positions of the headrest and the waist support can be flexibly adjusted according to the height of a user as required; therefore, comfortable use experience can be provided for users with different heights, and the technical problems that in the prior art, a backrest chair is generally of a unified single size, especially a headrest part and a waist support part, the height positions cannot be adjusted according to the heights of the users, and therefore the backrest chair is difficult to exactly match with the positions of the heads and the waists of the users are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to chair technical field especially relates to a chair back frame structure. BACKGROUND

[0002] Chair refers to various chairs such as office chair and the like equipped for work, study and the like in daily work and life, and in order to increase the use comfort, generally includes a headrest for supporting the head of a user and a lumbar support for supporting the waist of a user.

[0003] Chinese patent CN202123326917.5 discloses a multifunctional office chair, which comprises an office chair cushion, an office chair armrest, a small table plate mechanism, a battery charging hole, a seat base and a battery, the office chair cushion is equipped with office chair armrests on the left and right sides, the office chair armrest is equipped with a small table plate mechanism on the left side, the office chair cushion is equipped with an office chair base on the lower side, the office chair cushion is equipped with a battery on the rear side, the upper surface of the small table plate body is printed with a charging mark, the rear side of the charging mark is equipped with a wireless charger, the left and right sides of the charging mark are equipped with a mobile phone card plate, the right side of the charging mark is equipped with a limiting baffle, the front side of the mobile phone card plate is wrapped with an anti-skid soft pad, the front side of the anti-skid soft pad is provided with a sliding plate slot hole, the rear side of the sliding plate slot hole is provided with a limiting sliding plate, and the rear side of the mobile phone card plate is equipped with a card plate spring.

[0004] However, the backrest chair in the prior art is usually of a single size, especially the headrest part and the lumbar support part, which cannot be adjusted in height position according to the height of the user, so it is difficult to match the head and waist positions of the user, and it is difficult to adapt to provide comfortable use effect for users of different heights. UTILITY MODEL CONTENTS

[0005] The utility model aims at the deficiencies of prior art, provides a chair back frame structure, headrest body is installed on headrest connecting seat to carry out headrest height adjustment, lumbar support body is installed on lumbar support connecting seat to carry out lumbar support height adjustment, so that the height position of headrest and lumbar support can be flexibly adjusted according to the height of the user, so that comfortable use experience can be provided for users of different heights, and the technical problems that the backrest chair in the prior art is usually of a single size, especially the headrest part and the lumbar support part, which cannot be adjusted in height position according to the height of the user, so it is difficult to match the head and waist positions of the user are solved.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A chair back frame structure, comprising: a backrest part, a headrest part mounted on the upper part of the backrest part, and a lumbar support part mounted on the lower part of the backrest part; wherein the headrest part comprises a headrest connecting seat connected with the backrest part and a headrest body mounted on the headrest connecting seat; the lumbar support part comprises a lumbar support connecting seat connected with the backrest part and a lumbar support body mounted on the lumbar support connecting seat; the headrest body is mounted on the headrest connecting seat in a lifting manner for height adjustment of the headrest, and the lumbar support body is mounted on the lumbar support connecting seat in a lifting manner for height adjustment of the lumbar support.

[0008] As a preference, a lifting adjustment mechanism is arranged between the headrest connecting seat and the headrest body and between the lumbar support connecting seat and the lumbar support body, respectively.

[0009] As a preference, a wave-shaped slide is vertically arranged on each of the headrest connecting seat and the lumbar support connecting seat, and a clamping part is arranged on each of the headrest body and the lumbar support body to be slidingly matched with the slide for height adjustment and locking.

[0010] As a preference, the clamping part adopts a spring plunger structure, and the slide is composed of circular arc grooves connected vertically in sequence, the spring plunger is matched and clamped in the circular arc groove for position locking, and when force is applied, the spring plunger is clamped in the next circular arc groove after passing through the circular arc groove by elastic extension for height adjustment.

[0011] As a preference, a headrest sliding groove is vertically arranged on the headrest connecting seat, the slide is symmetrically arranged on the left and right side surfaces of the headrest sliding groove, a headrest sliding block is arranged on the headrest body, the clamping part is symmetrically mounted on the left and right side surfaces of the headrest sliding block, and the clamping part is slidingly matched with the corresponding slide.

[0012] As a preference, a lumbar support sliding groove is vertically arranged on the lumbar support connecting seat, a lumbar support sliding block is arranged on the lumbar support body to be slidingly matched with the lumbar support sliding groove, the slide is arranged on the side surface of the lumbar support sliding groove opposite to the lumbar support sliding block, and the clamping part is mounted on the side surface of the lumbar support sliding block opposite to the slide.

[0013] As a preference, a clamping jaw is arranged on the lower part of the headrest connecting seat, and the headrest connecting seat is detachably clamped on the backrest part through the clamping jaw.

[0014] As a preference, the backrest part and the lumbar support connecting seat are both arranged as frame structures, and are detachably connected through fasteners.

[0015] As a preference, the lower part of the lumbar support connecting seat is connected with the seat part of the chair.

[0016] Preferably, the webbing structure is mounted within the frame of the backrest portion and the headrest body, and the lumbar support body is located at the back side of the backrest portion and is arranged in close contact with the webbing structure of the backrest portion.

[0017] The utility model discloses the beneficial effect lies in:

[0018] (1) the utility model discloses a headrest body is lifted and is installed on the headrest connecting seat to carry out headrest height adjustment, and the lumbar support body is lifted and is installed on the lumbar support connecting seat to carry out lumbar support height adjustment, thereby can be according to user height as needed to the height position of headrest and lumbar support flexible adjustment, thereby can provide comfortable use experience for the user of different height for different height of user all can provide comfortable use experience;

[0019] (2) the utility model discloses the wave shape slide of being arranged respectively in the vertical direction on the headrest connecting seat and the lumbar support connecting seat, and the slide is formed by the circular arc groove that is connected in the vertical direction in proper order, and the headrest body and the lumbar support body are respectively provided with the clamping portion that is slidably matched on the slide, and the clamping portion adopts spring plunger structure, and the height is adjusted and locked by the cooperation of the two, and the spring plunger is matched and clamped in the circular arc groove to carry out position locking, and when being stressed, is clamped in the adjacent next circular arc groove after passing through the circular arc groove by the elastic extension to carry out height adjustment, and the structure is stable, and convenient operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the use state schematic drawing of the utility model;

[0021] Figure 2 It is the overall structure side view of the utility model;

[0022] Figure 3 It is Figure 2 the section view of A-A in Fig.

[0023] Figure 4 It is Figure 3 the enlarged view of B in Fig.

[0024] Figure 5 It is the structure schematic drawing of the headrest portion in the utility model;

[0025] Figure 6 It is the structure schematic drawing of the lifting adjusting mechanism in the utility model;

[0026] Figure 7 It is the structure schematic drawing of the lumbar support portion in the utility model;

[0027] Figure 8 It is the structure section view of the lumbar support portion in the utility model;

[0028] Figure 9 It is Figure 8 the enlarged view of C in Fig. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0030] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0031] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0032] Embodiment one

[0033] As shown in Figure 1 A chair back frame structure, comprising: a backrest part 1, a headrest part 2 is installed on the upper part of the backrest part 1, and a waist support part 3 is installed on the lower part of the backrest part 1; wherein the headrest part 2 comprises a headrest connecting seat 21 connected with the backrest part 1 and a headrest body 22 installed on the headrest connecting seat 21; the waist support part 3 comprises a waist support connecting seat 31 connected with the backrest part 1 and a waist support body 32 installed on the waist support connecting seat 31; the headrest body 22 is installed on the headrest connecting seat 21 in a lifting manner to adjust the height of the headrest, and the waist support body 32 is installed on the waist support connecting seat 31 in a lifting manner to adjust the height of the waist support.

[0034] In the embodiment, the headrest body 22 is lifted and installed on the headrest connecting seat 21 for height adjustment of the headrest, and the waist support body 32 is lifted and installed on the waist support connecting seat 31 for height adjustment of the waist support, so that the height positions of the headrest body 22 and the waist support body 32 can be flexibly adjusted according to the height of the user as needed, thereby providing comfortable use experience for users of different heights.

[0035] As preferred, a lifting adjustment mechanism 4 is arranged between the headrest connecting seat and the headrest body 22 and between the waist support connecting seat 31 and the waist support body 32, respectively, for adjusting and locking the height positions of the headrest body 22 and the waist support body 32.

[0036] As preferred, as shown in Figure 1 , 5 The lower part of the headrest connecting seat 21 is provided with a claw 211, and the headrest connecting seat 21 is detachably arranged on the backrest part 1 through the claw 211.

[0037] As preferred, the backrest part 1 and the waist support connecting seat 31 are both arranged as frame structures and are detachably connected through fasteners.

[0038] As preferred, as shown in Figure 1 The lower part of the waist support connecting seat 31 is connected with the seat part 5 of the chair.

[0039] As preferred, the frame of the backrest part 1 and the headrest body 22 is internally installed with a mesh structure, and the waist support body 32 is located at the rear side of the backrest part 1 and is arranged in close contact with the mesh structure of the backrest part 1.

[0040] Embodiment Two

[0041] The same or corresponding parts in the embodiment are denoted by the same reference numerals as in the above embodiments, and only the differences from the above embodiments will be described below for the sake of simplicity. The difference between the embodiment and the above embodiments is that:

[0042] As preferred, the lifting adjustment mechanism 4 includes a slide 41 and a clamping part 42.

[0043] As preferred, as shown in Figure 5 The headrest connecting seat 21 and the waist support connecting seat 31 are each vertically provided with a wave-shaped slide 41, and the headrest body 22 and the waist support body 32 are each provided with a clamping part 42 that is correspondingly slidably matched on the slide 41, and the two are cooperatively adjusted and locked in height.

[0044] As preferred, the engaging part 42 adopts a spring plunger structure, the slide 41 is composed of vertically connected circular arc grooves 40, the spring plunger is matched and engaged in the circular arc groove 40 to be position-locked, and when force is applied, the spring plunger is engaged in the next circular arc groove 40 after elastically extending over the circular arc groove 40 to be height-adjusted.

[0045] In the embodiment, the wave-shaped slide 41 is vertically arranged on the headrest connecting seat 21 and the waist support connecting seat 31, the slide 41 is composed of vertically connected circular arc grooves 40, the headrest body 22 and the waist support body 32 are respectively provided with the engaging part 42 matched and engaged on the slide 41, the engaging part 42 adopts a spring plunger structure, and the two are matched to adjust and lock the height, the spring plunger is matched and engaged in the circular arc groove 40 to be position-locked, and when force is applied, the spring plunger is engaged in the next circular arc groove 40 after elastically extending over the circular arc groove 40 to be height-adjusted, the structure is stable and the operation is convenient.

[0046] As preferred, as shown in Figure 6 , the headrest connecting seat 21 is vertically provided with a headrest sliding groove 43, the left and right sides of the headrest sliding groove 43 are symmetrically provided with the slide 41, the headrest body 22 is provided with a headrest sliding block 44, the left and right sides of the headrest sliding block 44 are symmetrically provided with the engaging part 42, and the engaging part 42 is slidably matched with the corresponding slide 41.

[0047] As preferred, as shown in Figures 3-4 , 8-9, the waist support connecting seat 31 is vertically provided with a waist support sliding groove 45, the waist support body 32 is provided with a waist support sliding block 46 matched and slidably arranged in the waist support sliding groove 45, the side of the waist support sliding groove 45 opposite to the waist support sliding block 46 is provided with the slide 41, and the side of the waist support sliding block 46 opposite to the slide 41 is provided with the engaging part 42.

[0048] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A chair back frame structure, characterized by, The utility model relates to a chair backrest height adjustable structure, including: Backrest part (1), the upper portion of backrest part (1) is installed with headrest part (2), the lower portion of backrest part (1) is installed with waist support part (3); Wherein, the headrest part (2) includes the headrest connecting seat (21) connected with the backrest part (1) and the headrest body (22) installed on the headrest connecting seat (21);The waist support part (3) includes the waist support connecting seat (31) connected with the backrest part (1) and the waist support body (32) installed on the waist support connecting seat (31); The headrest body (22) is installed on the headrest connecting seat (21) to adjust the height of headrest, and the waist support body (32) is installed on the waist support connecting seat (31) to adjust the height of waist support.

2. A seat back frame structure according to claim 1, wherein The headrest connecting seat and the headrest body (22) and the waist support connecting seat (31) and the waist support body (32) are provided with lifting adjusting mechanism (4) respectively.

3. A chair back frame structure according to claim 2, wherein The headrest connecting seat (21) and waist support connecting seat (31) are vertically provided with wave-shaped slide (41) respectively, and the headrest body (22) and waist support body (32) are respectively provided with engaging portion (42) matched and engaged on the slide (41), and the height is adjusted and locked by cooperation.

4. A seat back frame structure according to claim 3, wherein The engaging portion (42) adopts spring plunger structure, the slide (41) is composed of circular arc groove (40) connected vertically, the spring plunger is matched and engaged in the circular arc groove (40) to lock the position, and when force is borne, the spring plunger is engaged in the next circular arc groove (40) after passing the circular arc groove (40) by elastic extension to adjust the height.

5. A back frame structure according to claim 3 or 4, c h a r a c t e r i s e d in that The headrest connecting seat (21) is vertically provided with headrest sliding groove (43), and the left and right sides of the headrest sliding groove (43) are symmetrically provided with the slide (41), the headrest body (22) is provided with headrest sliding block (44), and the left and right sides of the headrest sliding block (44) are symmetrically provided with the engaging portion (42), and the engaging portion (42) is slidably connected with the corresponding slide (41).

6. A back frame structure according to claim 3 or 4, c h a r a c t e r i z e d in that The waist support connecting seat (31) is vertically provided with waist support sliding groove (45), and the waist support body (32) is provided with waist support sliding block (46) matched and slidably installed in the waist support sliding groove (45), and the slide (41) is arranged on the side of the waist support sliding groove (45) opposite to the waist support sliding block (46), and the engaging portion (42) is arranged on the side of the waist support sliding block (46) opposite to the slide (41).

7. The chair back frame structure of claim 1 wherein, The lower portion of the headrest connecting seat (21) is provided with clamping jaw (211), and the headrest connecting seat (21) is detachably arranged on the backrest part (1) through the clamping jaw (211).

8. The chair back frame structure of claim 1, wherein The backrest part (1) and the waist support connecting seat (31) are provided as frame structure, and the backrest part (1) and the waist support connecting seat (31) are detachably connected through fastener.

9. The chair back frame structure of claim 1, wherein The lower portion of the waist support connecting seat (31) is connected with the seat part (5) of the chair.

10. The chair back frame structure of claim 1, wherein The frame of the backrest part (1) and the headrest body (22) is provided with a mesh structure, and the waist support body (32) is located at the back side of the backrest part (1) and is matched or closely arranged with the mesh structure of the backrest part (1).

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