Electric seat rack

Abstract

The utility model relates to an electric seat rack which comprises a driving assembly, a seat frame supporting assembly, a backrest assembly and two mechanical stretching units arranged in a bilateral symmetry mode, the backrest assembly is hinged to the seat frame supporting assembly, and each mechanical stretching unit is composed of a leg and foot assembly and a transmission rod. The chair is characterized in that the two leg and foot assemblies are installed on the two sides of the seat frame supporting assembly respectively and hinged to one ends of the corresponding transmission rods respectively, the other ends of the transmission rods are hinged to the backrest assembly through backrest transmission rod hinge shafts, and the two ends of a driving rod of the driving assembly are connected with the two leg and foot assemblies respectively; the seat frame supporting assembly is composed of two quadrilateral supporting frames symmetrically arranged on the two sides and a connecting assembly for fixing the two quadrilateral supporting frames into a whole. The backrest assembly comprises a backrest frame and a backrest connecting piece. The seat frame supporting assembly is arranged, production and installation are convenient, cost is low, and overall stability is good.

Description

Technical Field

[0001] The present application relates to an electric seat frame, which is mainly applicable to the design and production of electric sofa frames with adjustable postures. Background Art

[0002] Referring to the patent disclosure document with the application publication number CN110693227A and the invention title "An Electric Mechanical Extension Device", one defect of the prior art is that it does not include a seat frame. On the one hand, it is not convenient for installation, and both the production installation adjustment steps and costs increase. On the other hand, if the processing accuracy is not ideal, the symmetry of the left and right side mechanisms may be affected, thereby affecting the stability of the overall movement mechanism. Summary of the Invention

[0003] The technical problem solved by the present application is to overcome the above deficiencies existing in the prior art, and to provide an electric seat frame with a seat frame support assembly, which is convenient for production and installation, has low cost, and good overall stability.

[0004] The technical solution adopted by the present application to solve the above technical problems is: an electric seat frame, including a drive assembly, a seat frame support assembly, a backrest assembly, and two mechanically extensible units symmetrically arranged on the left and right. The backrest assembly is hinged to the seat frame support assembly. Each mechanically extensible unit consists of a leg assembly and a transmission rod. The characteristics are: the two leg assemblies are respectively installed on both sides of the seat frame support assembly and are respectively hinged to one end of the corresponding transmission rod. The other end of the transmission rod is hinged to the backrest assembly through a backrest transmission rod hinge shaft. The two ends of the drive rod of the drive assembly are respectively connected to the two leg assemblies. The seat frame support assembly is composed of two quadrilateral support frames symmetrically arranged on both sides and a connection assembly that fixes the two quadrilateral support frames into one body. Through the above design, the present application provides an integrated structure of a seat frame support assembly symmetrically arranged on both sides. The two mechanically extensible units are directly installed on the seat frame support assembly, which is convenient, accurate for production, installation and maintenance, saves costs, and has high symmetry of the left and right side mechanically extensible units and good overall stability.

[0005] The connection assembly of the seat frame support assembly of the present application is composed of a front upper connector, a front lower connector, a rear upper connector, and a rear middle connector. The front upper connector, the front lower connector, the rear upper connector, and the rear middle connector are all fixedly connected to the two quadrilateral support frames, and are respectively used to fix the front upper part, the front lower part, the rear upper part, and the rear middle part of the two quadrilateral support frames.

[0006] The drive assembly of the present application further includes a drive device. The front end of the drive device is hinged to the drive rod, and the rear end of the drive device is hinged to the rear middle connector. The drive device uses an electric push rod, and the tilt angle of the backrest frame can be adjusted steplessly between 75° and 25°.

[0007] The backrest assembly described in this application includes a backrest frame and a backrest connecting piece. The backrest frame is connected to the upper end of the backrest connecting piece by bolts. The lower end of the backrest connecting piece is fixed to the backrest frame through a backrest transmission rod hinge shaft. The other end of the backrest connecting piece is hinged to the seat frame support assembly through a backrest seat frame hinge shaft. The disassembly and installation are very simple. The backrest frame and the backrest connecting piece can be not installed on the seat frame support assembly first and be packaged and transported separately, and then installed on the device of this application at the destination. On the one hand, it saves transportation space and cost, and on the other hand, it is not easy to be damaged.

[0008] The leg and foot assembly of this application is composed of a first leg connecting rod, a second leg connecting rod, a third leg connecting rod, a fourth leg connecting rod, a fifth leg connecting rod, a sixth leg connecting rod, and a footrest connecting piece. One end of the first leg connecting rod and the second leg connecting rod are both hinged to the seat frame support assembly. The middle of the first leg connecting rod is fixedly connected to the driving rod. The first leg connecting rod is hinged to one end of the transmission rod through a first leg connecting rod transmission rod hinge shaft. The other end of the first leg connecting rod is hinged to one end of the third leg connecting rod. The middle of the third leg connecting rod is hinged to the middle of the second leg connecting rod. The other end of the third leg connecting rod is hinged to one end of the fifth leg connecting rod. The middle of the fifth leg connecting rod is hinged to the middle of the fourth leg connecting rod. The other end of the fifth leg connecting rod is hinged to one end of the sixth leg connecting rod. The other end of the sixth leg connecting rod is hinged to one end of the footrest connecting piece. The other end of the footrest connecting piece is hinged to one end of the fourth leg connecting rod. The other end of the fourth leg connecting rod is hinged to the other end of the second leg connecting rod.

[0009] Compared with the prior art, this application has the following advantages and effects: It has a seat frame support assembly, is convenient for production and installation, has a low cost, and has good overall stability. Description of the Drawings

[0010] Figure 1 is a three-dimensional schematic diagram of the sitting posture state of the embodiment of this application.

[0011] Figure 2 is a side schematic diagram of the sitting posture state of the embodiment of this application.

[0012] Figure 3 is a three-dimensional schematic diagram of the lying posture state of the embodiment of this application.

[0013] Figure 4 is a side schematic diagram of the lying posture state of the embodiment of this application.

[0014] In the figure:

[0015] Drive assembly 1, drive rod 11, drive device 12, leg assembly 2, first leg link 21, first leg link transmission rod hinge shaft 211, second leg link 22, third leg link 23, fourth leg link 24, fifth leg link 25, sixth leg link 26, footrest connecting member 27, seat frame support assembly 3, two quadrilateral support frames 31 on both sides, connection assembly 32 for fixing the two quadrilateral support frames into one body, front upper connecting member 321, front lower connecting member 322, rear upper connecting member 323, rear middle connecting member 324, backrest assembly 4, backrest frame 41, backrest connecting member 42, backrest seat frame hinge shaft 43, backrest transmission rod hinge shaft 44, bolt 45, transmission rod 5, backrest frame tilt angle α. Detailed implementation mode

[0016] The present application will be further described in detail below with reference to 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. The upper right of the present application is the front, and the lower left is the rear. Figure 2 The upper right of the present application is the front, and the lower left is the rear.

[0017] See Figures 1 to 4 , the electric seat frame of the embodiment of the present application includes a drive assembly 1, a seat frame support assembly 3, a backrest assembly 4, and two mechanically extensible units arranged symmetrically on the left and right. The backrest assembly 4 is installed on the seat frame support assembly 3 through the backrest seat frame hinge shaft 43. Each mechanically extensible unit is composed of a leg assembly 2 and a transmission rod 5. The design feature of the present application is that the two leg assemblies 2 are respectively installed on both sides of the seat frame support assembly 3 and are respectively hinged to one end of the corresponding transmission rod 5. The other end of the transmission rod 5 is hinged to the backrest assembly 4 through the backrest transmission rod hinge shaft 44. Both ends of the drive rod 11 of the drive assembly 1 are respectively connected to the two leg assemblies 2. The seat frame support assembly 3 is composed of two quadrilateral support frames 31 arranged symmetrically on both sides and a connection assembly 32 for fixing the two quadrilateral support frames 31 into one body. Through the above design, the present application provides an integrated structure of the seat frame support assembly arranged symmetrically on both sides. The two mechanically extensible units are directly installed on the seat frame support assembly 3, which is convenient and accurate for production, installation and maintenance, saves costs, and has high symmetry of the mechanically extensible units on both sides and good overall stability.

[0018] The connection assembly 32 of the seat frame support assembly 3 of the present application is composed of a front upper connecting member 321, a front lower connecting member 322, a rear upper connecting member 323, and a rear middle connecting member 324, which are respectively used to fix the front upper part, front lower part, rear upper part, and rear middle part of the two quadrilateral support frames 31.

[0019] The drive assembly 1 described in this application further includes a drive device 12. The front end of the drive device 12 is hinged to the drive rod 11, and the rear end of the drive device 12 is hinged to the rear middle connecting member 324. Since the installation position of the rear middle connecting member 324 can be adjusted up and down according to actual needs, the driving force of the drive device 12 (specifically an electric push rod) is substantially horizontal, improving the working efficiency of the drive device 12.

[0020] The backrest assembly 4 described in this application includes a backrest frame 41 and a backrest connecting member 42. The backrest frame 41 is connected to the upper end of the backrest connecting member 42 by bolts 45. The lower end of the backrest connecting member 42 is fixed to the backrest frame 41 through the backrest transmission rod hinge shaft 44. The other end of the backrest connecting member 42 is hinged to the seat frame support assembly 3 through the backrest seat frame hinge shaft 43. The disassembly and installation are very simple. The backrest frame 41 and the backrest connecting member 42 can be separately packaged and transported, and then installed on the device of this application at the destination. On the one hand, it saves transportation space and cost, and on the other hand, it is not easily damaged.

[0021] The leg and foot assembly 2 of this application is composed of a first leg link 21, a second leg link 22, a third leg link 23, a fourth leg link 24, a fifth leg link 25, a sixth leg link 26, and a footrest connecting member 27. One ends of the first leg link 21 and the second leg link 22 are both hinged to the seat frame support assembly 3. The middle of the first leg link 21 is fixedly connected to the drive rod 11. The upper middle part of the first leg link is hinged to one end of the transmission rod 5 through the first leg link transmission rod hinge shaft 211. The other end of the first leg link 21 is hinged to one end of the third leg link 23. The middle of the third leg link 23 is hinged to the middle of the second leg link 22. The other end of the third leg link 23 is hinged to one end of the fifth leg link 25. The middle of the fifth leg link 25 is hinged to the middle of the fourth leg link 24. The other end of the fifth leg link 25 is hinged to one end of the sixth leg link 26. The other end of the sixth leg link 26 is hinged to one end of the footrest connecting member 27. The other end of the footrest connecting member 27 is hinged to one end of the fourth leg link 24. The other end of the fourth leg link 24 is hinged to the other end of the second leg link 22.

[0022] The drive device 12 described in this application uses an electric push rod, and the inclination angle α of the backrest frame 41 is adjusted steplessly between 75° and 25°.

[0023] The working process of this application is as follows:

[0024] At Figure 1In the sitting posture state, if the user wants to adjust the seat posture, the user can control the driving device 12 (prior art, not shown in the figure) through a controller to drive the driving rod 11 to move forward, thereby driving the leg and foot assembly 2 to unfold forward. While the leg and foot assembly 2 unfolds forward, the first leg link 21 drives the transmission rod 5 to move forward through the first leg link transmission rod hinge shaft 211, thereby driving the backrest transmission rod hinge shaft 44 to move forward, causing the backrest frame 41 to tilt backward relative to the backrest seat frame hinge shaft 43. After reaching the expected position, the controller is turned off or the maximum backward tilt angle (i.e., Figure 3 and Figure 4 the lying posture state shown) is reached, and the tilting stops. The operation of returning from the lying posture state to the sitting posture is similar.

[0025] Parts not described in this application are all prior art and will not be elaborated. Any simple deformation or combination of the technical features and technical solutions of this application shall be considered to fall within the protection scope of this application.

Claims

1. An electric chair frame, comprising a drive assembly, a seat frame support assembly, a backrest assembly and two mechanical extension units arranged symmetrically on the left and right, the backrest assembly is hinged on the seat frame support assembly, each mechanical extension unit is composed of a leg assembly and a transmission rod, and is characterized in that: The two leg and foot assemblies are respectively installed on both sides of the seat frame support assembly and are respectively hinged to one end of the corresponding transmission rod. The other end of the transmission rod is hinged to the backrest assembly through the backrest transmission rod hinge shaft. The two ends of the driving rod of the driving assembly are respectively connected to the two leg and foot assemblies. The seat frame support assembly consists of two quadrilateral support frames symmetrically arranged on both sides and a connecting assembly that fixes the two quadrilateral support frames into one.

2. The electric seat frame according to claim 1, characterized in that: The connection component of the seat frame support component consists of a front upper connection member, a front lower connection member, a rear upper connection member, and a rear middle connection member. The front upper connection member, the front lower connection member, the rear upper connection member, and the rear middle connection member are all fixedly connected to the two quadrilateral support frames.

3. The electric seat frame according to claim 2, characterized in that: The driving assembly also includes a driving device, a front end of the driving device is hinged to the driving rod, and a rear end of the driving device is hinged to the rear middle connecting piece.

4. The electric seat frame according to claim 1, characterized in that: The backrest assembly includes a backrest frame and a backrest connecting member. The backrest frame is connected to the upper end of the backrest connecting member by bolts, the lower end of the backrest connecting member is fixed to the backrest frame by a backrest transmission rod hinge shaft, and the other end of the backrest connecting member is hinged to the seat frame support assembly by a backrest seat frame hinge shaft.

5. The electric seat frame according to claim 1, characterized in that: The leg-foot assembly consists of a first leg link, a second leg link, a third leg link, a fourth leg link, a fifth leg link, a sixth leg link, and a footrest connecting piece. One ends of the first leg link and the second leg link are hinged on the seat frame support assembly, the middle part of the first leg link is fixedly connected to the driving rod, the first leg link is hinged to one end of the transmission rod through the first leg link transmission rod hinge shaft, the other end of the first leg link is hinged to one end of the third leg link, the middle part of the third leg link is hinged to the middle part of the second leg link, the other end of the third leg link is hinged to one end of the fifth leg link, the middle part of the fifth leg link is hinged to the middle part of the fourth leg link, the other end of the fifth leg link is hinged to one end of the sixth leg link, the other end of the sixth leg link is hinged to one end of the footrest connecting piece, the other end of the footrest connecting piece is hinged to one end of the fourth leg link, and the other end of the fourth leg link is hinged to the other end of the second leg link.

6. The electric seat frame according to claim 3, characterized in that: The driving device adopts an electric push rod, and the inclination angle α of the backrest frame is steplessly adjusted between 75° and 25°.

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