Manual backrest structure and chair

Abstract

The utility model discloses a manual backrest structure, which comprises a waist rest component, a backrest component, a backrest component, a backrest component and a backrest component, and is characterized in that the waist rest component comprises a waist rest body and a first plug connector arranged at the upper end of the waist rest body; the headrest assembly comprises a headrest body, head protectors rotationally matched with the left side and the right side of the headrest body, and a second plug connector arranged at the lower end of the headrest body; the first plug connector and the second plug connector are matched to achieve plug connection, through the plug connection design of the waist rest assembly and the headrest assembly, a modular structure is achieved, disassembly, assembly and transportation are convenient, the split type design allows independent adjustment of waist and head supports, and ergonomic adaptability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of home, concretely relates to a manual backrest structure and chair. BACKGROUND

[0002] With the improvement of people's comfort and ergonomics requirements of the seat, the design of backrest structure gradually develops from single support to split, adjustable direction. The traditional seat backrest usually adopts integral structure, and the waist and head support parts are fixedly connected or simply hinged, which has the following defects: the integral backrest has large volume, high transportation and storage cost, and cannot be flexibly disassembled or replaced according to the use scene; and the existing headrest structure is mostly fixed or only supports one-way angle adjustment, lacks adaptive support for head lateral inclination or relaxation posture, and long-term use easily causes cervical fatigue. SUMMARY

[0003] To solve the above technical problems, the utility model provides a manual backrest structure and chair, which realizes modular structure through the plug-in design of the waist rest assembly and the head rest assembly, is convenient for disassembly and transportation, and allows separate adjustment of the waist and head support through the split design, thereby improving the ergonomics adaptability.

[0004] The utility model adopts the following technical scheme:

[0005] A manual backrest structure comprises: a waist rest assembly comprising a waist rest body and a first plug-in part provided on the upper end of the waist rest body; a head rest assembly comprising a head rest body, head guards rotatably matched on the left and right sides of the head rest body, and a second plug-in part provided on the lower end of the head rest body; and the first plug-in part and the second plug-in part are matched to realize plug-in.

[0006] As a preferred, the head guard is a half-frame structure, and first ratchet multi-gear hinges are arranged between the two end portions of the head guard and the head rest body.

[0007] As a preferred, the manual backrest structure has a first state, in which the head guard and the head rest body are arranged in parallel or located in the same plane.

[0008] As a preferred, the manual backrest structure has a second state, in which there is a certain included angle between the head guard and the head rest body.

[0009] As a preferred, the head guard comprises an outer rod body and first and second horizontal rods located at the two ends of the outer rod body, the first and second horizontal rods are arranged in parallel and are provided with ratchet multi-gear hinges at the ends.

[0010] As a preferred, the length of the first horizontal rod is greater than the length of the second horizontal rod, and the outer rod body is arranged in an inclined manner.

[0011] As preferred, the first plug-in part and the second plug-in part have a locking snap.

[0012] As preferred, the lower end of the lumbar support assembly is provided with a second ratchet multi-gear hinge.

[0013] As preferred, the surfaces of the lumbar support assembly and the headrest assembly are provided with soft bag structures.

[0014] As preferred, the lumbar support body, the headrest body and the headrest are made of metal.

[0015] A chair with a manual backrest structure, comprising a manual backrest structure, further comprising a seat and a leg.

[0016] As preferred, the lower end of the lumbar support assembly is provided with a second ratchet multi-gear hinge, and a connecting rod is arranged on the second ratchet multi-gear hinge, and a fourth plug-in part matched with the connecting rod is arranged on the seat.

[0017] Compared with the prior art, the manual backrest structure and the chair have the following advantages: the lumbar support assembly and the headrest assembly are designed to be plugged in, so as to realize a modular structure, facilitate disassembly and transportation, and allow separate adjustment of the lumbar support and the headrest support due to the split design, thereby improving ergonomic adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an exploded structural schematic view of the manual backrest structure.

[0019] Figure 2 It is a structural schematic view of the headrest assembly.

[0020] Figure 3 It is a structural schematic view of the lumbar support assembly.

[0021] Figure 4 It is a structural schematic view of the manual backrest structure in the first state.

[0022] Figure 5 It is a structural schematic view of the manual backrest structure in the second state.

[0023] In the drawings, the lumbar support assembly 1, the lumbar support body 1-1, the first plug-in part 1-2, the second ratchet multi-gear hinge 1-3, the connecting rod 1-4, the locking snap 1-5, the headrest assembly 2, the headrest body 2-1, the headrest 2-2, the outer rod body 2-2-1, the first horizontal rod 2-2-2, the second horizontal rod 2-2-3, the second plug-in part 2-3, and the first ratchet multi-gear hinge 2-4. DETAILED DESCRIPTION

[0024] In order to facilitate understanding of the technical scheme of the present application, the following will be described in detail in combination with the drawings and specific embodiments.

[0025] Example 1

[0026] like Figures 1-5 As shown, a manual backrest structure includes a lumbar support assembly 1 and a headrest assembly 2:

[0027] The lumbar support assembly 1 includes a lumbar support body 1-1 and a first connector 1-2 disposed on the upper end of the lumbar support body 1-1;

[0028] The headrest assembly 2 includes a headrest body 2-1, head guards 2-2 rotatably fitted on the left and right sides of the headrest body 2-1, and a second connector 2-3 disposed at the lower end of the headrest body 2-1.

[0029] The first connector 1-2 and the second connector 2-3 cooperate to achieve insertion;

[0030] The modular structure is achieved through the plug-in design of the lumbar support component 1 and the headrest component 2, which facilitates disassembly and transportation. The plug-in connection simplifies the complexity of the backrest structure and reduces manufacturing costs. At the same time, the headrest body 2-1 is equipped with head guards 2-2 on both sides, which can protect the left and right sides of the head. In addition, the split design allows for independent adjustment of the lumbar and head support, improving ergonomic adaptability.

[0031] like Figure 2 As shown, the headrest 2-2 has a semi-frame structure, and both ends of the headrest 2-2 are equipped with first ratchet multi-position hinges 2-4 between themselves and the headrest body 2-1. The headrest 2-2 adopts a semi-frame structure combined with ratchet hinges to provide multi-angle locking function and multi-position adjustment to meet different head and neck posture requirements, thereby improving comfort. In addition, two first ratchet multi-position hinges 2-4 are provided to enhance the rotational stability of the headrest through double-sided hinges and prevent deformation under unilateral force.

[0032] like Figure 4 As shown, the manual backrest structure has a first state. In the first state, the headrest 2-2 and the headrest body 2-1 are arranged parallel to each other or located on the same plane, reducing unnecessary structural protrusions, avoiding the risk of scratches or accidental contact, forming a complete planar support, suitable for standard sitting posture.

[0033] like Figure 5 As shown, the manual backrest structure has a second state in which the headrest 2-2 and the headrest body 2-1 are at a certain angle. When the headrest 2-2 and the headrest body 2-1 form an angle, they provide lateral wrapping support to adapt to the needs of head tilting or side leaning, thus enhancing the protection of the cervical spine.

[0034] The headrest 2-2 comprises an outer rod body 2-2-1 and a first cross rod 2-2-2 and a second cross rod 2-2-3 located at both ends of the outer rod body 2-2-1, and the first cross rod 2-2-2 and the second cross rod 2-2-3 are arranged in parallel and are provided with ratchet multi-gear hinges 2-4 at the ends.

[0035] The first cross rod 2-2-2 is longer than the second cross rod 2-2-3, and the outer rod body 2-2-1 is arranged obliquely to optimize the stress distribution of the headrest.

[0036] The first plug-in part 1-2 and the second plug-in part 2-3 are provided with a locking hasp 1-5 to prevent the plug-in part from being accidentally separated to cause structural failure.

[0037] The lower end of the lumbar support assembly 1 is provided with a second ratchet multi-gear hinge 1-3 to realize multi-gear adjustment of the angle of the lumbar support assembly 1.

[0038] The surfaces of the lumbar support assembly 1 and the headrest assembly 2 are provided with soft bag structures to provide cushioning and avoid direct contact of metal components with the human body.

[0039] The lumbar support body 1-1, the headrest body 2-1 and the headrest 2-2 are all made of metal material, which ensures the high strength and durability of the core support components, and the metal frame provides a stable installation basis for the hinges and the plug-in parts.

[0040] A chair with a manual backrest structure comprises a manual backrest structure, a seat and a leg. A connecting rod 1-4 is arranged on the second ratchet multi-gear hinge 1-3 at the lower end of the lumbar support assembly 1, and a fourth plug-in part matched with the connecting rod 1-4 is arranged at a corresponding position on the seat, so that the plug-in structure facilitates quick installation or disassembly of the backrest assembly 1.

[0041] The above is only a preferred embodiment of the present application, and the protection scope of the present application is subject to the scope defined by the claims, and some improvements and refinements made by those skilled in the art without departing from the spirit and scope of the present application should also be regarded as the protection scope of the present application.

Claims

1. A manually adjustable backrest structure, characterized in that The utility model relates to a manual backrest structure, which comprises a lumbar support assembly (1) and a headrest assembly (2). The lumbar support assembly (1) comprises a lumbar support body (1-1) and a first plug-in connector (1-2) arranged at the upper end of the lumbar support body (1-1). The headrest assembly (2) comprises a headrest body (2-1), head guards (2-2) rotatably arranged on the left and right sides of the headrest body (2-1), and a second plug-in connector (2-3) arranged at the lower end of the headrest body (2-1). The first plug-in connector (1-2) and the second plug-in connector (2-3) are connected to each other.

2. The manual backrest structure according to claim 1, characterized in that The head guards (2-2) are in a half-frame structure, and first ratchet multi-gear hinges (2-4) are arranged between the two ends of the head guards (2-2) and the headrest body (2-1).

3. The manual backrest structure according to claim 2, characterized in that The manual backrest structure has a first state, in which the head guards (2-2) are parallel to the headrest body (2-1) or located in the same plane.

4. The manual backrest structure according to claim 2, characterized in that The manual backrest structure has a second state, in which the head guards (2-2) and the headrest body (2-1) form a certain angle.

5. The manual backrest structure according to claim 2, characterized in that, The head guards (2-2) comprise outer rod bodies (2-2-1), first horizontal rods (2-2-2), and second horizontal rods (2-2-3), and the first horizontal rods (2-2-2) and the second horizontal rods (2-2-3) are parallel to each other and are provided with ratchet multi-gear hinges (2-4) at the ends.

6. The manual backrest structure according to claim 5, characterized in that The length of the first horizontal rods (2-2-2) is greater than that of the second horizontal rods (2-2-3), and the outer rod bodies (2-2-1) are arranged in an inclined manner.

7. The manual backrest structure according to claim 1, characterized in that, The first plug-in connector (1-2) and the second plug-in connector (2-3) are provided with a locking snap (1-5).

8. The manual backrest structure according to claim 1, characterized in that, The lumbar support assembly (1) is provided with a second ratchet multi-gear hinge (1-3) at the lower end.

9. The manual backrest structure according to claim 1, characterized in that, The surfaces of the lumbar support assembly (1) and the headrest assembly (2) are provided with soft package structures.

10. The manual backrest structure according to claim 1, characterized in that, The lumbar support body (1-1), the headrest body (2-1), and the head guards (2-2) are all made of metal.

11. A chair having a manual backrest structure, characterized in that The utility model also comprises a seat and a support leg.

12. The chair having a manual backrest structure according to claim 11, characterized in that, The second ratchet multi-gear hinge (1-3) at the lower end of the lumbar support assembly (1) is provided with a connecting rod (1-4), and the seat is provided with a fourth plug-in connector matched with the connecting rod (1-4) at a corresponding position.

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