Electric seat mechanical stretching device and electric seat

Abstract

The utility model relates to an electric seat mechanical stretching device and an electric seat, the electric seat mechanical stretching device comprises two mechanical stretching units, a seat frame supporting assembly, a front driving piece and a rear driving piece, each mechanical stretching unit is composed of a leg assembly and a backrest rod, and the leg assemblies and the backrest rods are installed on the two sides of the seat frame supporting assembly; the two leg assemblies are connected through a front driving rod, the lower portions of the two backrest rods are connected through a rear driving rod, a leg driving device and a backrest rod driving device are further arranged, and the seat frame supporting assembly is composed of a seat plate, a backrest rod driving device mounting frame and a leg driving device mounting frame which are integrated. The tail of the leg driving device is installed on the leg driving device installation frame, the head of the leg driving device is hinged to the front driving rod, the tail of the backrest rod driving device is installed on the backrest rod driving device installation frame, the leg assembly is installed on the front portion of the seat plate, the rear portion of the seat plate is hinged to the backrest rod, and the head of the backrest rod driving device is hinged to the rear driving rod. The posture of the legs and the posture of the backrest can be electrically adjusted.

Description

Technical Field

[0001] The present application relates to an electric seat mechanical extension device and an electric seat, which are mainly suitable for the design of an electric seat with adjustable posture. Background Art

[0002] See patent application publication number CN106165992 A, titled "A Mechanical Extension Device for a Movable Seat and the Movable Seat Thereof." This design typically uses manual or single-motor drive, without the ability to electrically adjust the legs and backrest separately, making it inconvenient. Furthermore, the leg structure of this movable seat is relatively complex, with numerous parts and high material consumption, increasing production and maintenance costs. Summary of the Invention

[0003] The technical problem solved by the present application is to overcome the above-mentioned deficiencies in the prior art and to provide an electric seat mechanical extension device which can electrically adjust the leg and backrest postures respectively, has a simple structure, is easy to produce, install, use and maintain, and has a low cost.

[0004] The technical solution adopted by the present application to solve the above technical problems includes: an electric seat mechanical extension device, including two mechanical extension units and a seat frame support assembly, a front drive member, and a rear drive member arranged symmetrically on the left and right. Each mechanical extension unit is composed of a leg assembly and a backrest rod and is installed on both sides of the seat frame support assembly. The leg assemblies of the two mechanical extension units are connected by a front drive rod, and the lower parts of the backrest rods of the two mechanical extension units are connected by a rear drive rod. The design feature of the present application is that a leg drive device and a backrest rod drive device are also provided. The tail of the leg drive device is installed on the leg drive of the seat frame support assembly. On the device mounting frame, the head of the leg drive device is hinged to the front drive rod. The seat frame support assembly is composed of a seat plate, a backrest rod drive device mounting frame, and a leg drive device mounting frame. The seat plate, the backrest rod drive device mounting frame, and the leg drive device mounting frame are fixed together as a whole. The tail of the backrest rod drive device is installed on the backrest rod drive device mounting frame. The leg assembly is installed on the front of the seat plate. The rear of the seat plate is hinged to the backrest rod through the seat plate backrest rod hinge axis. The head of the backrest rod drive device is hinged to the rear drive rod hinge axis, driving the backrest rod to rotate around the seat plate backrest rod hinge axis to adjust the upper inclination angle of the backrest rod. The present application controls the opening and closing of the legs through the leg drive device and controls the upper inclination angle of the backrest rod 5 through the backrest rod drive device. The leg and backrest postures can be electrically controlled and adjusted separately, reducing the number of parts, simplifying the installation, maintenance and debugging steps, and relatively saving costs.

[0005] The leg assembly described in this application consists only of a first leg link, a second leg link, a third leg link, a fourth leg link, and a footrest. The front drive rod is fixedly connected to the first leg link. One end of the first leg link and one end of the second leg link are both hinged to the front part of the seat plate. The other end of the first leg link is hinged to one end of the third leg link. The other end of the third leg link is hinged to one end of the footrest. The other end of the footrest is hinged to one end of the fourth leg link. The middle of the fourth leg link is hinged to the first leg link, and the other end of the fourth leg link is hinged to the other end of the second leg link. The leg part of this application only requires 5 components, which relatively simplifies the structure and saves costs.

[0006] A leg assembly limit is provided on the footrest described in this application. When in the lying position, the leg assembly limit touches and limits the third leg link; when in the sitting position, the leg assembly limit touches and limits the fourth leg link.

[0007] The technical solution adopted by this application to solve the above technical problems further includes: an electric seat, characterized in that: the electric seat is formed by rotatably installing the above-mentioned electric seat mechanical extension device on the chassis through a leg drive device mounting bracket, and the user can conveniently adjust the seat orientation by freely rotating.

[0008] Compared with the prior art, this application has the following advantages and effects: It can electrically adjust the leg and backrest postures respectively, has a simple structure, is convenient for production, installation and maintenance, and has a low cost. Description of the Drawings

[0009] Figure 1 is a perspective view of the electric seat in the sitting position according to the embodiment of this application.

[0010] Figure 2 is a top view of the electric seat in the sitting position according to the embodiment of this application.

[0011] Figure 3 is Figure 2 the C-C sectional view of

[0012] Figure 4 is Figure 2 the D-D sectional view of

[0013] Figure 5 is a perspective view of the electric seat in the lying position according to the embodiment of this application.

[0014] In the figure:

[0015] Seat frame support assembly 1, seat board 11, backrest rod drive device mounting bracket 12, leg drive device mounting bracket 13, seat board backrest rod hinge shaft 14, front drive rod 2, leg assembly 3, first leg link 31, second leg link 32, third leg link 33, fourth leg link 34, footrest 35, leg assembly limit 351, rear drive rod 4, rear drive rod hinge shaft 41, backrest rod 5, rotating shaft 6, chassis 7, leg drive device 8, backrest rod drive device 9. Detailed implementation mode

[0016] The following further details the present application in conjunction with the accompanying drawings and through embodiments. The following embodiments are explanations of the present application, and the present application is not limited to the following embodiments. In the present application Figure 3 the front is to the left and the rear is to the right.

[0017] Refer to Figures 1 to 5 , the electric seat mechanical stretching device in the embodiment of the present application includes two mechanically stretching units arranged symmetrically left and right, a seat frame support assembly 1, a front drive member 2, and a rear drive member 4. Each mechanically stretching unit is composed of a leg assembly 3 and a backrest rod 5 and is installed on both sides of the seat frame support assembly 1. The leg assemblies 3 of the two mechanically stretching units are connected by a front drive rod 2, and the lower parts of the backrest rods 5 of the two mechanically stretching units are connected by a rear drive rod 4. The design feature of the present application is that a leg drive device 8 and a backrest rod drive device 9 are provided. The tail of the leg drive device 8 is installed on the leg drive device mounting bracket 13 of the seat frame support assembly 1, the head of the leg drive device 8 is hinged to the front drive rod 2, the tail of the backrest rod drive device 9 is installed on the backrest rod drive device mounting bracket 12 of the seat frame support assembly 1. The seat frame support assembly 1 is composed of a seat board 11, a backrest rod drive device mounting bracket 12, and a leg drive device mounting bracket 13. The seat board 11, the backrest rod drive device mounting bracket 12, and the leg drive device mounting bracket 13 are fixed into one body. The front part of the seat board 11 is hinged to one ends of the first leg link 31 and the second leg link 32, and the rear part of the seat board 11 is hinged to the backrest rod 5 through the seat board backrest rod hinge shaft 14. The head of the backrest rod drive device 9 is hinged to the rear drive rod hinge shaft 41 and controls the rear drive rod 4 to drive the backrest rod 5 to rotate around the seat board backrest rod hinge shaft 14 to adjust the inclination angle of the upper part of the backrest rod 5. The present application controls the opening and closing of the legs through the leg drive device 8 and controls the inclination angle of the upper part of the backrest rod 5 through the backrest rod drive device 9, which can electrically control and adjust the legs and the backrest respectively, reduce the number of parts, simplify the installation, maintenance and debugging steps, and relatively save costs.

[0018] The leg assembly 3 described in the present application is composed only of a first leg link 31, a second leg link 32, a third leg link 33, a fourth leg link 34, and a footrest 35. The front drive rod 2 is fixedly connected to the first leg link 31, one end of the first leg link 31 and one end of the second leg link 32 are hinged to the seat plate 11, the other end of the first leg link 31 is hinged to one end of the third leg link 33, the other end of the third leg link 33 is hinged to one end of the footrest 35, the other end of the footrest 35 is hinged to one end of the fourth leg link 34, the middle of the fourth leg link 34 is hinged to the first leg link 31, and the other end of the fourth leg link 34 is hinged to the other end of the second leg link 32.

[0019] The application mainly works as follows:

[0020] When the user wishes to open their legs, they can control the head of the leg driving device 8 to move forward, which in turn drives the first leg link 31 to rotate forward through the front driving rod 2, driving the third leg link 33 and the fourth leg link 34 connected thereto to move accordingly. The third leg link 33 and the fourth leg link 34 then drive the footrest 35 and the second leg link 32 connected thereto to move accordingly, until the operator stops opening their legs or the legs reach the maximum open position (which can be limited by the maximum travel of the head of the leg driving device 8 and / or the leg assembly limit 351). When the user wishes to fold their legs, they can similarly control the head of the leg driving device 8 to move backward until the operator stops folding their legs or the legs reach the minimum open position (which can be limited by the minimum travel of the head of the leg driving device 8 and / or the leg assembly limit 351).

[0021] When the operator wants to adjust the tilt angle of the backrest rod 5, the backrest rod driving device 9 can drive the rear driving rod 4 to drive the backrest rod 5 to rotate around the seat plate backrest rod hinge shaft 14 to adjust the upper tilt angle of the backrest rod 5; similarly, the upper tilt angle of the backrest rod 5 is controlled by the operator within the range of the maximum to minimum head travel of the backrest rod driving device 9 and / or the mechanical structure limit range of the prior art.

[0022] After the electric seat mechanical extension device of the present application is installed on the chassis 7 through the rotating shaft 6, a rotatable electric seat is formed.

[0023] Any part not described in this application is prior art and will not be described in detail. Any simple variation or combination of the technical features and technical solutions of this application should be considered to fall within the scope of protection of this application.

Claims

1. An electric seat mechanical extension device, comprising two mechanically symmetrically arranged mechanical extension units, a seat frame support assembly, a front drive member, and a rear drive member. Each mechanical extension unit consists of a leg assembly and a backrest rod and is mounted on both sides of the seat frame support assembly. The leg assemblies of the two mechanical extension units are connected by a front drive rod, and the lower parts of the backrest rods of the two mechanical extension units are connected by a rear drive rod. The characteristics are as follows: There is also provided a leg driving device and a backrest rod driving device. The seat frame support assembly is composed of a seat board, a mounting bracket for the backrest rod driving device, and a mounting bracket for the leg driving device and is fixed integrally. The tail of the leg driving device is mounted on the mounting bracket for the leg driving device, the head of the leg driving device is hinged to the front driving rod, the tail of the backrest rod driving device is mounted on the mounting bracket for the backrest rod driving device, the front part of the seat board is mounted with a leg assembly, the rear part of the seat board is hinged to the backrest rod through a seat board backrest rod hinge shaft, and the head of the backrest rod driving device is hinged to the rear driving rod hinge shaft.

2. The electric seat mechanical extension device according to claim 1, wherein: The leg assembly is only composed of a first leg link, a second leg link, a third leg link, a fourth leg link, and a footrest. The front driving rod is fixedly connected to the first leg link. One end of the first leg link and one end of the second leg link are both hinged to the front part of the seat board. The other end of the first leg link is hinged to one end of the third leg link. The other end of the third leg link is hinged to one end of the footrest. The other end of the footrest is hinged to one end of the fourth leg link. The middle of the fourth leg link is hinged to the first leg link. The other end of the fourth leg link is hinged to the other end of the second leg link.

3. The electric seat mechanical extension device according to claim 2, wherein: A leg assembly limit is provided on the footrest. When in the lying position, the leg assembly limit touches and limits the third leg link; when in the sitting position, the leg assembly limit touches and limits the fourth leg link.

4. An electric seat, characterized in that: The electric seat is formed by rotatably mounting the electric seat mechanical extension device according to any one of claims 1 to 3 on the chassis through a mounting bracket for the leg driving device.

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