Large-stroke back-chasing mechanism and large-stroke back-chasing chair with same

Abstract

The utility model discloses a large-stroke back-chasing mechanism and a large-stroke back-chasing chair with the large-stroke back-chasing mechanism, the large-stroke back-chasing mechanism comprises a seat cushion assembly, a backrest swing rod assembly, a backrest assembly and a driving assembly, two opposite ends of the backrest swing rod assembly are respectively and rotatably connected with the seat cushion assembly and the backrest assembly; the two opposite ends of the driving assembly are rotationally riveted to the seat cushion assembly and the backrest swing rod assembly respectively, and the driving assembly can drive the backrest swing rod assembly to rotate and drive the backrest assembly to move front and back. The backrest swing rod assembly can be driven to rotate through the driving assembly, the backrest assembly is driven to move front and back, the purpose that children can conduct operation by themselves is achieved, automatic back chasing of the maximum stroke can be achieved through one-key adjustment, practicability is higher, operation is simpler, cost is lower, experience feeling is better, and the back chasing device is suitable for industrial application and popularization.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of seat, concretely relates to a big stroke pursuit back mechanism and big stroke pursuit back chair with same. BACKGROUND

[0002] The pursuit back chair with the pursuit back function can automatically adjust the supporting degree according to the sitting posture of the child, ensures that the back of the child is continuously supported, thereby helping to maintain the correct sitting posture. This design helps to reduce the problem of waist and back pain caused by improper posture when the child learns or plays for a long time, and improves the comfort. The seat without the pursuit back function lacks this automatic adjustment function, and the child may need to adjust the sitting posture to adapt to the seat, and the comfort is relatively low.

[0003] However, the adjustment mode of the pursuit back chair on the market is relatively cumbersome, and the front and rear movement of the seat needs to be adjusted simultaneously in combination with the front and rear pursuit back adjustment of the backrest to meet the change of the maximum and minimum stroke.

[0004] Based on this, the utility model discloses a big stroke pursuit back mechanism and big stroke pursuit back chair with same. UTILITY MODEL CONTENTS

[0005] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a big stroke pursuit back mechanism and big stroke pursuit back chair with same.

[0006] In order to achieve the above-mentioned purpose and achieve the above-mentioned technical effect, the utility model adopts the technical scheme that:

[0007] A big stroke pursuit back mechanism, including seat pad assembly, backrest swing lever assembly, backrest assembly and drive assembly, the opposite ends of the backrest swing lever assembly are rotatably connected with the seat pad assembly and the backrest assembly respectively, the opposite ends of the drive assembly are rotatably riveted with the seat pad assembly and the backrest swing lever assembly respectively, the backrest swing lever assembly can be driven to rotate through the drive assembly, and the backrest assembly is driven to move forward and backward.

[0008] Further, the side of the seat pad assembly is provided with a rotating shaft, and the backrest assembly is rotatably connected to the rotating shaft.

[0009] Further, the lower part of the backrest swing lever assembly is rotatably riveted with the seat pad assembly and the drive assembly, and the upper part of the backrest swing lever assembly is rotatably riveted with the backrest assembly.

[0010] Further, the backrest swing lever assembly is provided with two groups and is symmetrically arranged on the left and right sides of the seat pad assembly.

[0011] Furthermore, each group of the backrest rocker arm assembly includes a first rocker arm and a second rocker arm, the lower parts of the first rocker arm and the second rocker arm are respectively rotationally riveted on the two rotating shafts of the seat cushion assembly on the same side, the upper parts of the first rocker arm and the second rocker arm are respectively rotationally riveted on the backrest assembly to form a four-bar structure, and the extension section below the second rocker arm is rotationally riveted to the drive assembly.

[0012] Furthermore, the driving assembly is arranged below the seat cushion assembly, one end of the driving assembly is rotatably riveted to the seat cushion assembly, and the other end opposite thereto is rotatably riveted to the second rocker arm of the backrest rocker arm assembly.

[0013] Furthermore, a first locking and unlocking device is provided on the seat cushion assembly.

[0014] Furthermore, a second locking and unlocking device is provided on the driving assembly for fixing the position of the backrest assembly when it moves forward and backward.

[0015] The utility model discloses a long-stroke back-recovery chair, comprising the long-stroke back-recovery mechanism described above.

[0016] Furthermore, the long-stroke reclining chair also includes a chair leg assembly and a seat cushion support rod assembly, the chair leg assembly is arranged at the bottom of the long-stroke reclining chair, the seat cushion support rod assembly is fixed to the chair leg assembly, the seat cushion assembly is arranged on the seat cushion support rod assembly, and the seat cushion assembly can slide on the seat cushion support rod assembly.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model discloses a large-stroke back-recruiting mechanism and a large-stroke back-recruiting chair with the same. The opposite ends of a driving assembly are designed to be rotatably riveted to a seat cushion assembly and a backrest rocker assembly respectively, so that the backrest rocker assembly can be driven to rotate by the driving assembly, thereby driving the backrest assembly to move forward and backward, so that children can operate it by themselves, and automatic back-recruiting with a maximum stroke can be achieved through one-touch adjustment. The utility model has stronger practicality, simpler operation, lower cost, and better user experience, and is suitable for industrial promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2-3 They are respectively side views of the present utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the utility model after adjusting the backrest assembly;

[0022] Figure 5 It is a rear view of the present invention. DETAILED DESCRIPTION

[0023] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0024] The following is a brief summary of one or more aspects to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceivable aspects and is neither intended to identify key or critical elements of all aspects nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that will be provided later.

[0025] like Figure 1-5 As shown, the utility model discloses a large-stroke chasing back mechanism, including a seat cushion assembly 3, a backrest rocker assembly 4, a backrest assembly 5 and a driving assembly 6. The opposite ends of the backrest rocker assembly 4 are rotatably connected to the seat cushion assembly 3 and the backrest assembly 5 respectively, and the opposite ends of the driving assembly 6 are rotatably riveted to the seat cushion assembly 3 and the backrest rocker assembly 4 respectively. The driving assembly 6 can drive the backrest rocker assembly 4 to rotate, thereby driving the backrest assembly 5 to move forward and backward.

[0026] In the present invention, a rotating shaft 301 is provided on the side of the seat cushion assembly 3, and the backrest assembly 5 is rotatably connected to the rotating shaft 301. A first locking and unlocking device is provided on the seat cushion assembly 3 to fix the position of the seat cushion assembly 3.

[0027] In the present invention, the lower portion of the backrest rocker assembly 4 is rotationally riveted to the seat cushion assembly 3 and the drive assembly 5 , and the upper portion of the backrest rocker assembly 4 is rotationally riveted to the backrest assembly 5 .

[0028] In the present utility model, two groups of backrest rocker rod assemblies 4 are provided, which are symmetrically arranged on the left and right sides of the seat cushion assembly 3. Each group of backrest rocker rod assemblies 4 includes a first rocker rod 401 and a second rocker rod 402. The lower parts of the first rocker rod 401 and the second rocker rod 402 are respectively rotatably riveted on the two rotating shafts 301 of the seat cushion assembly 3 on the same side. The upper parts of the first rocker rod 401 and the second rocker rod 402 are respectively rotatably riveted on the backrest assembly 5 to form a four-link structure. The extension section below the second rocker rod 402 is rotatably riveted to the drive assembly 6.

[0029] In the present invention, the drive assembly 6 is arranged below the seat cushion assembly 3, one end of the drive assembly 6 is rotatably riveted to the seat cushion assembly 3, and the other end is rotatably riveted to the extension section below the second rocker 402 of the backrest rocker assembly 4.

[0030] The drive assembly 6 is preferably a pneumatic rod that can be extended and locked. The extension and retraction of the drive assembly 6 drives the second rocker arm 402 to rotate about the rotation axis 301, thereby driving the first rocker arm 401 to rotate, and in turn driving the backrest assembly 5 to move forward and backward. At the same time, a second locking and unlocking device is provided on the drive assembly 6 to fix the position of the backrest assembly 5 during forward and backward movement.

[0031] The present utility model also discloses a long-stroke chasing back chair, comprising a long-stroke chasing back mechanism as described above, a chair leg assembly 1 and a seat cushion support rod assembly 2, wherein the chair leg assembly 1 is arranged at the bottom of the long-stroke chasing back chair, the seat cushion support rod assembly 2 is fixed on the chair leg assembly 1, and the seat cushion assembly 3 is arranged on the seat cushion support rod assembly 2, and the seat cushion assembly 3 can slide on the seat cushion support rod assembly 2.

[0032] This setting enables children to operate it by themselves, and automatic chasing of the maximum stroke can be achieved with one-touch adjustment. It is more practical, easier to operate, lower in cost and provides a better experience.

[0033] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A long-stroke chasing mechanism, characterized in that: It includes a seat cushion assembly, a backrest rocker assembly, a backrest assembly and a drive assembly. The opposite ends of the backrest rocker assembly are respectively rotatably connected to the seat cushion assembly and the backrest assembly. The opposite ends of the drive assembly are respectively rotatably riveted to the seat cushion assembly and the backrest rocker assembly. The drive assembly can drive the backrest rocker assembly to rotate, thereby driving the backrest assembly to move forward and backward.

2. A long-stroke chasing mechanism according to claim 1, characterized in that: A rotating shaft is provided on the side of the seat cushion assembly, and the backrest assembly is rotatably connected to the rotating shaft.

3. A long-stroke chasing mechanism according to claim 1, characterized in that: The lower part of the backrest rocker assembly is rotationally riveted to the seat cushion assembly and the driving assembly, and the upper part of the backrest rocker assembly is rotationally riveted to the backrest assembly.

4. A long-stroke chasing mechanism according to claim 1, characterized in that: The backrest rocker assembly is provided in two groups and is symmetrically arranged on the left and right sides of the seat cushion assembly.

5. A long-stroke chasing mechanism according to claim 4, characterized in that: Each group of the backrest rocker arm assembly includes a first rocker arm and a second rocker arm. The lower parts of the first rocker arm and the second rocker arm are respectively rotatably riveted on the two rotating shafts of the seat cushion assembly on the same side. The upper parts of the first rocker arm and the second rocker arm are respectively rotatably riveted on the backrest assembly to form a four-bar connecting rod structure. The extension section below the second rocker arm is rotatably riveted to the drive assembly.

6. A long-stroke chasing mechanism according to claim 1, characterized in that: The driving assembly is arranged below the seat cushion assembly. One end of the driving assembly is rotatably riveted to the seat cushion assembly, and the other opposite end is rotatably riveted to the second rocker arm of the backrest rocker arm assembly.

7. The long-stroke chasing mechanism according to claim 1, characterized in that: A first locking and unlocking device is provided on the seat cushion assembly.

8. The long-stroke chasing mechanism according to claim 1, characterized in that: A second locking and unlocking device is provided on the driving assembly for fixing the position of the backrest assembly when it moves forward and backward.

9. A long-travel chair with a reclining back, characterized in that: It comprises a long-stroke chasing mechanism as described in any one of claims 1-8.

10. The long-travel reclining chair according to claim 9, characterized in that: The long-stroke reclining chair also includes a chair leg assembly and a seat cushion support rod assembly, the chair leg assembly is arranged at the bottom of the long-stroke reclining chair, the seat cushion support rod assembly is fixed to the chair leg assembly, the seat cushion assembly is arranged on the seat cushion support rod assembly, and the seat cushion assembly can slide on the seat cushion support rod assembly.

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