Electric seat frame

Abstract

The present application relates to an electric seat frame, comprising a driving assembly, a seat frame support assembly, a backrest assembly, and two mechanical extension units symmetrically arranged on the left and right, wherein the backrest assembly is hinged to the seat frame support assembly, and each mechanical extension unit consists of a leg assembly and a transmission rod. The electric seat frame is characterized in that two leg assemblies are respectively mounted on two sides of the seat frame support assembly and are each hinged to one end of a corresponding transmission rod; the other end of each transmission rod is hinged to the backrest assembly by means of a backrest transmission rod hinge shaft; two ends of a driving rod of the driving assembly are respectively connected to the two leg assemblies; and the seat frame support assembly consists of two quadrilateral support frames symmetrically arranged on two sides and a connecting assembly for fixing the two quadrilateral support frames into a whole. The backrest assembly comprises a backrest frame and a backrest connector. The present application is provided with the seat frame support assembly, and therefore is convenient to produce and mount, has low costs, and has good overall stability.

Description

Electric seat frame Technical Field

[0001] This application relates to an electric seat frame, which is mainly applicable to the design and production of posture-adjustable electric sofa frames. Background Technology

[0002] See the patent publication document with application publication number CN110693227A and invention title "An Electromechanical Extension Device". One drawback of the prior art is that it does not include a seat frame. On the one hand, it is inconvenient to install, and the production, installation and adjustment steps and costs are increased. On the other hand, if the processing accuracy is not ideal, the symmetry of the left and right sides of the mechanism may be affected, thereby affecting the stability of the overall motion mechanism. Summary of the Invention

[0003] The technical problem solved by this application is to overcome the above-mentioned deficiencies in the prior art and to provide an electric seat frame with a seat frame support assembly that is easy to manufacture and install, has low cost, and good overall stability.

[0004] The technical solution adopted by this application to solve the above-mentioned technical problems is as follows: an electric seat frame, including a drive assembly, a seat frame support assembly, a backrest assembly, and two mechanical extension units symmetrically arranged on the left and right sides. The backrest assembly is hinged to the seat frame support assembly. Each mechanical extension unit consists of a leg assembly and a transmission rod. 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 consists of two quadrilateral support frames symmetrically arranged on both sides and a connecting assembly that fixes the two quadrilateral support frames into one unit. Through the above design, this application provides an integrated structure of a seat frame support assembly symmetrically arranged on both sides. The two mechanical extension units are directly installed on the seat frame support assembly, making production, installation, and maintenance more convenient and accurate, saving costs, and ensuring high symmetry and overall stability of the mechanical extension units on both sides.

[0005] The connecting component of the seat frame support assembly described in this application consists 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 two quadrilateral support frames and are 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, respectively.

[0006] The drive assembly described in this application also includes a drive device, the front end of which is hinged to a drive rod, and the rear end of which is hinged to a rear center connector. The drive device employs an electric push rod, and the backrest frame tilt angle is infinitely adjustable between 75° and 25°.

[0007] The backrest assembly described in this application includes a backrest frame and a backrest connector. The backrest frame is connected to the upper end of the backrest connector by bolts, and the lower end of the backrest connector is fixed to the backrest frame by a hinge shaft of the backrest transmission rod. The other end of the backrest connector is hinged to the seat frame support assembly by a hinge shaft of the backrest seat frame. Disassembly and installation are very simple. The backrest frame and backrest connector can be packaged and transported separately without being installed on the seat frame support assembly. After being transported to the destination, the backrest frame and backrest connector can be installed on the device of this application. This saves transportation space and costs and is less likely to be damaged.

[0008] The leg assembly of this application 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 connector. One end of the first leg link and the second leg link are both hinged to the seat frame support assembly. The middle part of the first leg link is fixedly connected to the drive rod. The first leg link is hinged to one end of the drive rod via a 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 connector. The other end of the footrest connector is hinged to one end of the fourth leg link. The other end of the fourth leg link is hinged to the other end of the second leg link.

[0009] Compared with the prior art, this application has the following advantages and effects: it has a seat frame support component, which makes production and installation convenient and cost-effective, and has good overall stability. Attached Figure Description

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

[0011] Figure 2 is a side view of the seated posture in an embodiment of this application.

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

[0013] Figure 4 is a side view of the lying position in an embodiment of this application.

[0014] In the picture:

[0015] Drive assembly 1, drive rod 11, drive device 12, leg assembly 2, first leg connecting rod 21, first leg connecting rod transmission rod hinge shaft 211, second leg connecting rod 22, third leg connecting rod 23, fourth leg connecting rod 24, fifth leg connecting rod 25, sixth leg connecting rod 26, footrest plate connector 27, seat frame support assembly 3, quadrilateral support frames on both sides 31, connecting assembly 32 that fixes the two quadrilateral support frames into one piece, front upper connector 321, front lower connector 322, rear upper connector 323, rear middle connector 324, backrest assembly 4, backrest frame 41, backrest connector 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

[0016] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are explanations of the present application, but the present application is not limited to the following embodiments. In Figure 2 of this application, the upper right corner represents the front, and the lower left corner represents the rear.

[0017] Referring to Figures 1-4, the electric seat frame of this embodiment includes a drive assembly 1, a seat frame support assembly 3, a backrest assembly 4, and two mechanical extension units symmetrically arranged on the left and right. The backrest assembly 4 is mounted on the seat frame support assembly 3 via a backrest-seat frame hinge shaft 43. Each mechanical extension unit consists of a leg assembly 2 and a transmission rod 5. A key design feature of this application is that the two leg assemblies 2 are respectively mounted on both sides of the seat frame support assembly 3 and 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 via a backrest transmission rod hinge shaft 44. The two 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 consists of two quadrilateral support frames 31 symmetrically arranged on both sides and a connecting assembly 32 that fixes the two quadrilateral support frames 31 into one unit. Through the above design, this application provides an integrated structure of a seat frame support assembly symmetrically arranged on both sides. The two mechanical extension units are directly mounted on the seat frame support assembly 3, making production, installation, and maintenance more convenient and accurate, saving costs, and resulting in high symmetry between the left and right mechanical extension units and good overall stability.

[0018] The connecting component 32 of the seat frame support assembly 3 described in this application consists of a front upper connector 321, a front lower connector 322, a rear upper connector 323, and a rear middle connector 324, which are used to fix the front upper part, front lower part, rear upper part, and rear middle part of the two quadrilateral support frames 31, respectively.

[0019] The drive assembly 1 described in this application also includes a drive device 12, the front end of which is hinged to the drive rod 11, and the rear end of which is hinged to the rear-middle connector 324. Since the installation position of the rear-middle connector 324 can be adjusted up and down according to actual needs, the driving force of the drive device 12 (in particular, an electric push rod) is approximately horizontal, thereby 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 connector 42. The backrest frame 41 is connected to the upper end of the backrest connector 42 by bolts 45. The lower end of the backrest connector 42 is fixed to the backrest frame 41 by a hinge shaft 44 of the backrest transmission rod. The other end of the backrest connector 42 is hinged to the seat frame support assembly 3 by a hinge shaft 43 of the backrest seat frame. Disassembly and installation are very simple. The backrest frame 41 and the backrest connector 42 can be packaged and transported separately. After arriving at the destination, the backrest frame 41 and the backrest connector 42 can be installed on the device of this application, which saves transportation space and cost on the one hand, and is not easily damaged on the other hand.

[0021] The leg assembly 2 of this application consists 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 connector 27. One end of the first leg link 21 and the second leg link 22 are both hinged to the seat frame support assembly 3. The middle part of the first leg link 21 is fixedly connected to the drive rod 11. The upper 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 connected to the third leg link 23. One end of the third leg connecting rod 23 is hinged to the middle of the second leg connecting rod 22. The other end of the third leg connecting rod 23 is hinged to one end of the fifth leg connecting rod 25. The middle of the fifth leg connecting rod 25 is hinged to the middle of the fourth leg connecting rod 24. The other end of the fifth leg connecting rod 25 is hinged to one end of the sixth leg connecting rod 26. The other end of the sixth leg connecting rod 26 is hinged to one end of the footrest connecting piece 27. The other end of the footrest connecting piece 27 is hinged to one end of the fourth leg connecting rod 24. The other end of the fourth leg connecting rod 24 is hinged to the other end of the second leg connecting rod 22.

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

[0023] The application process is as follows:

[0024] In the seated position shown in Figure 1, if the user wants to adjust the seat posture, they can control the drive device 12 via a controller (existing technology, not shown in the figure), thereby driving the drive rod 11 forward, causing the leg assembly 2 to extend forward. Simultaneously, the first leg link 21, through the first leg link transmission rod hinge shaft 211, drives the transmission rod 5 forward, thereby causing 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. Once the desired position is reached, the controller is turned off, or the tilting stops after reaching the maximum tilt angle (i.e., the reclining position shown in Figures 3 and 4). Returning from the reclining position to the seated position is similar.

[0025] All parts not described in this application are prior art and will not be detailed further. Any simple modifications or combinations of the technical features and solutions of this application shall be considered to fall within the protection scope of this application.

Claims

1. An electrically powered seat frame comprising a drive assembly, a seat frame support assembly, a backrest assembly hinged to the seat frame support assembly, and two mechanically extending units arranged in left-right symmetry, each mechanically extending unit consisting of a leg assembly and a transmission rod, characterized in that: Two leg assemblies are respectively installed on both sides of the seat frame supporting assembly and are respectively hingedly connected with one end of the corresponding transmission rod, the other end of the transmission rod is hingedly connected with the backrest assembly through a backrest transmission rod hinging shaft, both ends of the driving rod of the driving assembly are respectively connected with the two leg assemblies, the seat frame supporting assembly is composed of two quadrilateral supporting frames symmetrically arranged on both sides and a connecting assembly for fixing the two quadrilateral supporting frames into one body.

2. The power seat track of claim 1, wherein: The connecting assembly of the seat frame supporting assembly is composed of a front upper connecting piece, a front lower connecting piece, a rear upper connecting piece and a rear middle connecting piece, and the front upper connecting piece, the front lower connecting piece, the rear upper connecting piece and the rear middle connecting piece are fixedly connected with the two quadrilateral supporting frames.

3. The power seat track of claim 2 wherein: The driving assembly further comprises a driving device, the front end of the driving device is hingedly connected with the driving rod, and the rear end of the driving device is hingedly connected with the rear middle connecting piece.

4. The power seat track of claim 1 wherein: The backrest assembly comprises a backrest frame and a backrest connecting piece, the backrest frame is connected with the upper end of the backrest connecting piece through bolts, the lower end of the backrest connecting piece is fixed with the backrest frame through a backrest transmission rod hinging shaft, and the other end of the backrest connecting piece is hingedly connected with the seat frame supporting assembly through a seat frame hinging shaft.

5. The power seat track of claim 1 wherein: The leg assembly 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 foot plate connecting piece, one end of the first leg connecting rod and the second leg connecting rod is hingedly connected with the seat frame supporting assembly, the middle part of the first leg connecting rod is fixedly connected with the driving rod, one end of the first leg connecting rod is hingedly connected with the transmission rod through a first leg connecting rod transmission rod hinging shaft, the other end of the first leg connecting rod is hingedly connected with one end of the third leg connecting rod, the middle part of the third leg connecting rod is hingedly connected with the middle part of the second leg connecting rod, the other end of the third leg connecting rod is hingedly connected with one end of the fifth leg connecting rod, the middle part of the fifth leg connecting rod is hingedly connected with the middle part of the fourth leg connecting rod, the other end of the fifth leg connecting rod is hingedly connected with one end of the sixth leg connecting rod, the other end of the sixth leg connecting rod is hingedly connected with one end of the foot plate connecting piece, the other end of the foot plate connecting piece is hingedly connected with one end of the fourth leg connecting rod, and the other end of the fourth leg connecting rod is hingedly connected with the other end of the second leg connecting rod.

6. The power seat track of claim 3 wherein: 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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