Chair back structure and chair

Abstract

The utility model discloses a chair back structure and a chair. The chair back structure comprises a main frame, and a first frame, a second frame, a third frame and a fourth frame which are sequentially arranged on the main frame from top to bottom, the second frame is used for supporting the back; the middles of the first frame, the second frame and the third frame are all arranged in a forward protruding mode, the lower end of the third frame is arranged in a suspended mode, and the third frame is made of elastic materials and used for bearing the waist. The first frame and the second frame are arranged on the main frame and used for bearing the neck and the shoulders respectively, the third frame is arranged for bearing the waist, the lower portion of the third frame is arranged in a suspended mode, and the third frame has elasticity and has a better supporting effect on the waist and the back. The first frame, the second frame and the third frame are arranged in a forward protruding mode and can better fit the back and the waist of the human body, and the comfort degree during long-time sitting is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to furniture technology field especially chair back structure and chair. BACKGROUND

[0002] At present, seats are widely used in various aspects of people's life, according to the different places of use, seat includes office chair, car seat, meeting seat etc.

[0003] The chair back structure on the existing chair is mostly single supporting surface, only can play the role of supporting the back of human body, cannot well adhere and support neck and waist, and the comfort of long sitting is poor. INNOVATION CONTENT

[0004] The utility model provides a chair back structure, aims at at least one of the technical problems existing in prior art.

[0005] The utility model discloses a chair back structure, including including main frame and by upper and down sequentially set on the main frame: first frame, second frame (300) and third frame (400);

[0006] The middle part of the first frame (200), the second frame (300) and the third frame (400) are all convex, the lower end of the third frame (400) is suspended, and the third frame (400) is made of elastic material.

[0007] According to some embodiments of the utility model, the main frame, the first frame, the second frame and the third frame are integrally formed.

[0008] According to some embodiments of the utility model, the first frame and the main frame, the second frame and the main frame are all formed with a hollow semicircular structure.

[0009] According to some embodiments of the utility model, the first frame, the second frame and the third frame are all provided with a card net groove on the side surface.

[0010] According to some embodiments of the utility model, the main frame extends downwardly with a connecting portion, and the connecting portion is used for connecting a seat.

[0011] According to some embodiments of the utility model, a handrail is further included, and both sides of the main frame are provided with mounting portions, and the handrail is detachably connected to the mounting portions.

[0012] According to some embodiments of the utility model, the side end of the handrail is equipped with a bolt, the periphery of the bolt is equipped with a locking block, the outside of the mounting part is equipped with a slot, the shape of the slot matches the shape of the locking block, after the bolt is inserted into the slot and rotated, the slot can restrict the locking block in the mounting part.

[0013] According to some embodiments of the utility model, the handrail extends downward with a connecting arm, and the connecting arm is used for connecting a seat.

[0014] According to some embodiments of the utility model, the middle part of the main frame is further equipped with a reinforcing rib.

[0015] The second aspect of the technical scheme of the utility model relates to a chair, which comprises the chair back structure as described above.

[0016] The utility model has the advantages as follows:

[0017] 1、On the main frame, the first frame and the second frame are arranged to form support for the back, the third frame is arranged to support the waist, and the third frame is suspended below, the third frame itself has elasticity, and better support effect is achieved for the waist and the back, and the first frame, the second frame and the third frame are arranged to be convex in front, so that the back and the waist of the human body are better fitted, and the comfort during long sitting is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the overall schematic view of the chair back structure of the utility model embodiment;

[0019] Figure 2 It is the exploded view of the chair back structure of the utility model embodiment.

[0020] Reference numerals:

[0021] Main frame 100, connecting part 110, mounting part 120, slot 121, reinforcing rib 130;

[0022] First frame 200, semicircular structure 210, card net slot 220;

[0023] Second frame 300;

[0024] Third frame 400;

[0025] Handrail 500, bolt 510, locking block 520, connecting arm 530. DETAILED DESCRIPTION

[0026] The following will describe several embodiments of the present application, including the corresponding embodiments of the drawings, it can be understood that the drawings are used to assist understanding the technical features and technical solutions of the present application, and should not be understood as limiting the scope of protection of the present application.

[0027] The following will describe the concept, specific structure and technical effects of the present application in conjunction with the embodiments and the drawings, in order to fully understand the purpose, scheme and effect of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0028] It should be noted that, unless otherwise explicitly limited, when a certain feature is referred to as "fixed", "connected", "installed", "arranged" on another feature, it can be directly "fixed", "connected", "installed", "arranged" on another feature, or indirectly "fixed", "connected", "installed", "arranged" on another feature. The words "fixed", "connected", "installed", "arranged" should be understood broadly, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application according to the specific content of the technical scheme.

[0029] It should be noted that the description of the orientation or position relationship based on the drawings or embodiments used in the present application is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0030] It should be noted that the term "and / or" used in the present application includes any combination of one or more related listed items, the meaning of several is one or more, the meaning of multiple is at least two, greater than, less than, more than, etc. Understand as not including the number, above, below, within, etc. Understand as including the number.

[0031] It should be noted that in the present application, if the first, second is only used for the purpose of distinguishing technical features, it cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features or implicitly indicating the sequence of the indicated technical features.

[0032] It should be noted that, unless otherwise explicitly limited, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art. The terms used in the specification of the present application are only used to describe the specific embodiments, and are not intended to limit the present application.

[0033] Reference Figure 1 andFigure 2 The technical scheme of the first aspect of the utility model relates to a chair back structure, including including main frame 100 and by upper and lower sequentially set on main frame 100: first frame 200, second frame 300 for supporting back, third frame 400, the middle part of first frame 200, second frame 300 and third frame 400 are all convexly set, so that first frame 200, second frame 300 and third frame 400 form wave structure, the lower end of third frame 400 is suspendedly set, third frame 400 is elastic material piece, and third frame 400 is used to support waist.

[0034] In the above embodiment, the elastic material can be polyurethane, thermoplastic polyurethane elastomer, thermoplastic elastomer, etc. In the present embodiment, a hollow semicircular structure 210 is formed between the first frame 200 and the second frame 300 and the main frame 100, so that the structure is not easy to deform, and the shrinkage phenomenon during injection molding can also be prevented. In some other embodiments, the first frame 200 and the second frame 300 and the main frame 100 can also be in a non-hollow form or in a form of other hollow patterns. By setting the first frame 200 and the second frame 300, a plurality of independently supported back pads can be obtained after installing the mesh surface, which provides better support and fitting effect for the back. In some other embodiments, a plurality of first frames 200 and second frames 300 can be provided, and the actual use requirements can be set.

[0035] The chair back structure has at least the following beneficial effects: the first frame 200 and the second frame 300 are arranged on the main frame 100 to support the back, the third frame 400 is arranged to support the waist, the third frame 400 is suspended below and has elasticity, which provides better support for the waist and the back, and the first frame 200, the second frame 300 and the third frame 400 are convexly arranged to better fit the back and the waist of the human body, thereby improving the comfort during long sitting.

[0036] According to some embodiments of the utility model, the main frame 100, the first frame 200, the second frame 300 and the third frame 400 are integrally formed, which improves the structural strength, reduces the assembly process and improves the production efficiency.

[0037] According to some embodiments of the utility model, the side surfaces of the first frame 200, the second frame 300 and the third frame 400 are provided with mesh fixing grooves 220, the mesh surface is fixed by the mesh fixing grooves 220, the first frame 200, the second frame 300 and the third frame 400 form independent backrests and waist rests respectively, and better support is provided for the back and the waist.

[0038] According to some embodiments of the present application, the main frame 100 extends downwardly with a connecting portion 110, the connecting portion 110 is used for connecting a seat, reduces the arrangement of other components, and facilitates the disassembly of the whole chair.

[0039] According to some embodiments of the present application, the armrest 500 is detachably connected to the mounting portion 120, the side end of the armrest 500 is provided with a latch 510, the periphery of the latch 510 is provided with a locking block 520, the outer side of the mounting portion 120 is provided with a slot 121, the shape of the slot 121 matches the shape of the locking block 520, after the latch 510 is inserted into the slot 121 and rotated, the slot 121 can restrict the locking block 520 in the mounting portion 120, during the assembly process, after the locking block 520 is aligned with the slot 121, the armrest 500 is pushed towards the mounting portion 120 until the locking block 520 and the latch 510 both pass through the slot 121 and enter the mounting portion, the armrest 500 is rotated so that the locking block 520 and the slot 121 are in a non-parallel state, at this time, the locking block 520 cannot be taken out of the slot 121, and the armrest 500 is connected to the main frame 100, and in the actual use process, a horizontal limiting structure can also be added inside the mounting portion 120, so that the armrest 500 can be rotated to a horizontal position at most and cannot be rotated any more.

[0040] According to some embodiments of the present application, the armrest 500 extends downwardly with a connecting arm 530, the connecting arm 530 is used for connecting a seat.

[0041] According to some embodiments of the present application, the middle part of the main frame 100 is also provided with a reinforcing rib 130, and the reinforcing rib 130 enhances the overall structural strength of the main frame 100.

[0042] The technical scheme of the second aspect of the present application relates to a chair, which comprises the chair back structure as described above.

[0043] It should be noted that in the present application, terms such as "one embodiment", "some embodiments", "basic embodiment", "extended embodiment" and the like are used to describe several embodiments of the present application, and the specific features, structures, materials or characteristics in several embodiments can be combined in accordance with the principles and purposes of the present application.

[0044] The utility model discloses should not be limited to the above embodiment, as long as it reaches the technical effect of the utility model with the same or equivalent means, the change, modification, equivalent replacement and equivalent modification etc. of these embodiments within the spirit and principle of the disclosure without departing from the principle and the tenet of the utility model, all should be included in the protection scope of the disclosure, should be considered to belong to the protection scope of the utility model.

Claims

1. A chair back structure, characterized by, The chair back structure comprises a main frame (100) and a first frame (200), a second frame (300) and a third frame (400) arranged on the main frame (100) in sequence from top to bottom. The middle part of the first frame (200), the second frame (300) and the third frame (400) is convex forward, the lower end of the third frame (400) is suspended, and the third frame (400) is made of elastic material.

2. A chair back structure according to claim 1, wherein The main frame (100), the first frame (200), the second frame (300) and the third frame (400) are integrally formed.

3. A chair back structure according to claim 1, wherein The first frame (200) and the main frame (100), and the second frame (300) and the main frame (100) are formed with a hollow semicircular structure (210).

4. The chair back structure of claim 1, wherein The side of the first frame (200), the second frame (300) and the third frame (400) is provided with a card net slot (220).

5. The chair back structure of claim 1, wherein The main frame (100) extends downward with a connecting part (110) for connecting a seat.

6. The chair back structure of claim 1, wherein The main frame (100) is provided with a mounting part (120) on both sides, and a handrail (500) is detachably connected to the mounting part (120).

7. A chair back structure according to claim 6, wherein The side end of the handrail (500) is provided with a latch (510), the periphery of the latch (510) is provided with a locking block (520), the outside of the mounting part (120) is provided with a slot (121), the shape of the slot (121) matches the shape of the locking block (520), and after the latch (510) is inserted into the slot (121) and rotated, the slot (121) can limit the locking block (520) in the mounting part (120).

8. A backrest structure according to claim 6 or 7, characterised in that, The handrail (500) extends downward with a connecting arm (530) for connecting a seat.

9. The chair back structure of claim 1, wherein The middle part of the main frame (100) is further provided with a reinforcing rib (130).

10. A chair, characterized in that The chair back structure comprises a main frame (100) and a first frame (200), a second frame (300) and a third frame (400) arranged on the main frame (100) in sequence from top to bottom. The chair back structure comprises a main frame (100) and a first frame (200), a second frame (300) and a third frame (400) arranged on the main frame (100) in sequence from top to bottom.

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