Horizontal pushing and swinging chair back device and chair thereof

Abstract

The utility model belongs to the field of office furniture, and discloses a horizontal-pushing swinging chair back device and a chair thereof, which comprise a chair back and a waist rest which are connected in a matching way, and further comprise a horizontal-pushing stretching mechanism, the rear end of the horizontal-pushing stretching mechanism is connected with the chair back, and the front end of the horizontal-pushing stretching mechanism is connected with the waist rest through a plurality of annularly distributed elastic mechanisms; the horizontal pushing stretching mechanism pushes the waist rest backwards through stretching. The back-and-forth horizontal pushing function of the backrest is achieved through the horizontal pushing stretching mechanism, the self-adaptive swinging of the waist rest is achieved through the elastic mechanism of the annular cloth, and therefore the experience feeling of a user is improved.

Description

Technical Field

[0001] The utility model relates to the field of office furniture, and specifically relates to a flat-push swing-backrest device and a seat thereof. Background Technique

[0002] In order to improve the user experience, lumbar supports are currently installed on the backrests of many office chairs. However, the existing lumbar supports generally have the following problems:

[0003] 1) The lumbar support cannot be pushed flat back and forth;

[0004] 2) The lumbar support cannot swing with the user's body. Content of the Utility Model

[0005] The purpose of the utility model is to provide a flat-push swing-backrest device and a seat thereof to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A flat-push swing-backrest device includes a backrest and a lumbar support that are connected in cooperation, and further includes a flat-push extension mechanism. The rear end of the flat-push extension mechanism is connected to the backrest, and the front end is connected to the lumbar support through a plurality of circumferentially arranged elastic mechanisms. The flat-push extension mechanism pushes the lumbar support forward through extension.

[0008] Further, the flat-push extension mechanism is a scissor mechanism.

[0009] Further, the scissor mechanism includes a first mounting seat, a second mounting seat, a first scissor arm, a second scissor arm, a connecting rod, and a telescopic driver. The second mounting seat is arranged front and rear relative to the first mounting seat. The first mounting seat is connected to the backrest, and the second mounting seat is connected to the lumbar support through an elastic mechanism. The first scissor arm and the second scissor arm are both arranged between the first mounting seat and the second mounting seat, and the first scissor arm and the second scissor arm are arranged left and right relative to each other. The connecting rod is connected between the first scissor arm and the second scissor arm. One end of the telescopic driver is rotatably connected to the first mounting seat, and the other end is rotatably connected to the connecting rod.

[0010] Further, the telescopic driver is a cylinder.

[0011] Further, first mounting plates are arranged on both the left and right sides of the front end of the flat-push extension mechanism, and the elastic mechanism is arranged between the first mounting plate and the lumbar support.

[0012] Further, a shock absorber is arranged between the rear side of the flat-push extension mechanism and the backrest.

[0013] Further, the elastic mechanism is a spring mechanism.

[0014] Further, the spring mechanism includes two relatively arranged spring seats and a spring connected between the two spring seats.

[0015] Further, the flat-push and swing backrest device includes at least four circumferentially arranged elastic mechanisms.

[0016] The present utility model also provides a seat, including the flat-push and swing backrest device as described above.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: The present utility model realizes the forward flat-push function of the backrest through the flat-push extension mechanism, and also realizes the adaptive swing of the lumbar support through the circumferentially arranged elastic mechanisms, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is one of the structural schematic diagrams of the present utility model.

[0019] Figure 2 is the second structural schematic diagram of the present utility model.

[0020] Figure 3 is the exploded structural schematic diagram of the present utility model.

[0021] Figure 4 is the structural schematic diagram of the scissor mechanism in the present utility model.

[0022] Figure 5 is the structural schematic diagram of the spring mechanism in the present utility model.

[0023] In the figure: backrest 1, lumbar support 2, scissor mechanism 3, first mounting seat 300, second mounting seat 301, first scissor arm 302, second scissor arm 303, connecting rod 304, cylinder 305, shock absorber 306, first mounting plate 307, spring mechanism 4, spring seat 400, spring 401. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-5 , a flat-push and swing backrest device, including a backrest 1, a lumbar support 2, and a flat-push extension mechanism. The rear end of the flat-push extension mechanism is connected to the backrest 1, and the front end is connected to the lumbar support 2 through a plurality of circumferentially arranged elastic mechanisms. The flat-push extension mechanism pushes the lumbar support 2 forward through extension.

[0026] Continue to refer to Figure 4 , in an embodiment of the present utility model, the flat-push extension mechanism is a scissor mechanism 3. The scissor mechanism 3 includes a first mounting seat 300, a second mounting seat 301, a first scissor arm 302, a second scissor arm 303, a connecting rod 304 and a telescopic driver. The second mounting seat 301 is arranged opposite to the first mounting seat 300 front and back. The first mounting seat 300 is connected to the backrest 1, and the second mounting seat 301 is connected to the lumbar support 2 through an elastic mechanism. The first scissor arm 302 and the second scissor arm 303 are both arranged between the first mounting seat 300 and the second mounting seat 301, and the first scissor arm 302 and the second scissor arm 303 are arranged opposite to each other left and right. The connecting rod 304 is connected between the first scissor arm 302 and the second scissor arm 303. One end of the telescopic driver is rotatably connected to the first mounting seat 300, and the other end is rotatably connected to the connecting rod 304. The telescopic driver is preferably a cylinder 305. Among them, both the first scissor arm 302 and the second scissor arm 303 are X-hinged structures. The front and back sides of the upper end of the first scissor arm 302 are respectively slidably connected to the second mounting seat 301 and the first mounting seat 300 up and down, and the front and back sides of the lower end of the first scissor arm 302 are respectively rotatably connected to the second mounting seat 301 and the first mounting seat 300. Similarly, the front and back sides of the upper end of the second scissor arm 303 are respectively slidably connected to the second mounting seat 301 and the first mounting seat 300 up and down, and the front and back sides of the lower end of the second scissor arm 303 are respectively rotatably connected to the second mounting seat 301 and the first mounting seat 300.

[0027] The structure and working principle of the scissor mechanism 3 are well-known technologies, which are the same as those of a scissor lift and will not be elaborated here.

[0028] Continue to refer to Figures 1-4 , in an embodiment of the present utility model, two first mounting plates 307 are respectively arranged up and down on the left and right sides of the second mounting seat 301. There are four elastic mechanisms, which are correspondingly arranged between the first mounting plates 307 and the lumbar support 2.

[0029] In other embodiments of the present utility model, the number of elastic mechanisms can be adjusted.

[0030] Continue to refer to Figures 1-4 , in an embodiment of the present utility model, two second mounting plates are respectively arranged up and down on the left and right sides of the first mounting seat 300. A damping member 306 is arranged between the second mounting plates and the backrest 1. The damping member 306 is preferably a rubber block.

[0031] Continue to refer to Figure 5 , in an embodiment of the present utility model, the elastic mechanism is a spring mechanism 4. The spring mechanism 4 includes two spring seats 400 arranged opposite to each other front and back and a spring 401 connected between the two spring seats 400. The spring seat 400 at the rear side is connected to the first mounting plate 307, and the spring seat 400 at the front side is connected to the lumbar support 2.

[0032] When pushed flat, the cylinder 305 drives the entire scissor mechanism 3 to extend. The scissor mechanism 3 drives the lumbar support 2 to move forward through the extension. The cylinder 305 is a one-way cylinder, and the user can make the lumbar support 2 reset backward by reclining backward.

[0033] When swaying, the user's waist leans on the lumbar support 2. When the user moves the waist, due to the existence of the looped spring, the lumbar support 2 will perform multi-angle adaptive swaying along with the movement of the user's waist, improving the experience.

[0034] The present utility model also provides a seat, and the seat includes a flat-pushing and swaying backrest device as described above.

[0035] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A push-and-sway chair back device, comprising a chair back (1) and a lumbar support (2) that are connected in a matching manner, characterized in that: It also comprises a horizontal push and stretch mechanism, the rear end of which is connected to the chair back (1), and the front end of which is connected to the lumbar support (2) via a plurality of elastic mechanisms of ring cloths, and the horizontal push and stretch mechanism pushes the lumbar support (2) forward by stretching.

2. The horizontal push rocking chair back device according to claim 1, characterized in that: The horizontal push and stretch mechanism is a scissor-type mechanism (3).

3. The horizontal push rocking chair back device according to claim 2, characterized in that: The scissor mechanism (3) comprises a first mounting seat (300), a second mounting seat (301), a first scissor arm (302), a second scissor arm (303), a connecting rod (304) and a telescopic driver. The second mounting seat (301) and the first mounting seat (300) are arranged opposite to each other in front and back. The first mounting seat (300) is connected to the chair back (1). The second mounting seat (301) is connected to the waist support (2) via an elastic mechanism. The first scissor arm (302) and the second scissor arm (303) are both arranged between the first mounting seat (300) and the second mounting seat (301). The first scissor arm (302) and the second scissor arm (303) are arranged opposite to each other in left and right. The connecting rod (304) is connected between the first scissor arm (302) and the second scissor arm (303). One end of the telescopic driver is rotatably connected to the first mounting seat (300), and the other end is rotatably connected to the connecting rod (304).

4. The horizontal push rocking chair back device according to claim 3, characterized in that: The telescopic driver is a cylinder (305).

5. The horizontal push rocking chair back device according to claim 1, characterized in that: First mounting plates (307) are provided on both left and right sides of the front end of the horizontal push and stretch mechanism, and the elastic mechanism is provided between the first mounting plate (307) and the waist support (2).

6. The horizontal push and swing chair back device according to claim 1, characterized in that: A vibration damping member (306) is arranged between the rear side of the horizontal push and stretch mechanism and the chair back (1).

7. The horizontal push and swing chair back device according to claim 1, characterized in that: The elastic mechanism is a spring mechanism (4).

8. The horizontal push and rocking chair back device according to claim 7, characterized in that: The spring mechanism (4) comprises two spring seats (400) arranged opposite to each other and a spring (401) connected between the two spring seats (400).

9. The horizontal push rocking chair back device according to claim 1, characterized in that: The horizontal push and rocking chair back device comprises at least four elastic mechanisms of ring cloth.

10. A seat, characterized in that: It comprises the push-and-swing chair back device as claimed in any one of claims 1-9.

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