Electric seat mechanical extension device

Abstract

This application relates to a mechanical extension device for an electric seat, comprising two mechanical extension units and a connecting assembly. Each mechanical extension unit includes a seat assembly, a backrest assembly, and a posture adjustment assembly. The posture adjustment assembly is mounted on the electric seat frame, and the seat assembly is mounted on the posture adjustment assembly. The backrest assembly consists of a backrest component, a backrest mounting component, a first backrest adjustment component, and a second backrest adjustment component. The backrest component is hinged to one end of both the backrest mounting component and the first backrest adjustment component. The other end of the backrest mounting component is hinged to the seat assembly via a mounting shaft. The middle portion of the first backrest adjustment component is mounted to the seat assembly via a mounting shaft. The other end of the first backrest adjustment component is hinged to one end of the second backrest adjustment component via a hinge shaft. The other end of the second backrest adjustment component is hinged to the posture adjustment assembly via a mounting shaft. This application features a simple structure and good reliability and stability.

Description

Technical Field

[0001] This application relates to a main frame for an electric seat, and more particularly to the design and application of a mechanical extension device for an electric seat. Background Technology

[0002] See Figure 1 It shows the appendix to the patent document for patent number 202321280547.2, entitled "An Electric Seat Mechanical Extension Device". Figure 4 Regarding the partial structure of this patent document, the following defects exist: 1. The backrest fixing plate 21' is fixed in position relative to the seat mounting plate 27'. When lying down, the backrest support plate 20' tilts backward, and the user's back pressure F is offset from the upper center of the connecting piece 18'. Therefore, a large torque is generated on the upper part of the connecting piece 18', affecting the stability and reliability of the structure. 2. The connecting piece of this structure is relatively complex. A backrest return spring is required when the backrest is reset, which also affects the overall reliability and stability. Summary of the Invention

[0003] The first technical problem solved by this application is to overcome the aforementioned first deficiency in the prior art and provide an electric seat mechanical extension device to improve reliability and stability; the second technical problem solved by this application is to overcome the aforementioned second deficiency in the prior art, simplify the posture adjustment components, save costs, and further improve reliability and stability.

[0004] The technical solution adopted by this application to solve the first technical problem mentioned above is: an electric seat mechanical extension device, including two mechanical extension units arranged symmetrically on the left and right and a connecting assembly connecting the two mechanical extension units. Each mechanical extension unit includes a seat assembly, a backrest assembly, and a posture adjustment assembly. The posture adjustment assembly is installed on the electric seat frame, and the seat assembly is installed on the posture adjustment assembly. The backrest assembly is characterized in that: the backrest assembly is composed of a backrest component, a backrest mounting component, a backrest adjustment component one, and a backrest adjustment component two. The backrest component is hinged to one end of the backrest mounting component and one end of the backrest adjustment component one, respectively. The other end of the backrest mounting component is hinged to the seat assembly through the backrest mounting component mounting shaft. The middle part of the backrest adjustment component one is installed on the seat assembly through the backrest adjustment component one mounting shaft. The other end of the backrest adjustment component one is hinged to one end of the backrest adjustment component two through the backrest adjustment component two hinge shaft. The other end of the backrest adjustment component two is hinged to the mounting side plate of the posture adjustment assembly through the backrest adjustment component two mounting shaft. When this embodiment changes from a TV position to a reclining position, the drive device moves the seat assembly forward and upward relative to the mounting side plate. The seat assembly then moves the backrest assembly forward. The other end of the backrest adjustment component is limited by the backrest adjustment component and the mounting side plate, and the forward movement is less than that of the backrest adjustment component. This causes the backrest adjustment component to move forward and downward, and the backrest tilts backward. The pressure on the user's back is shared by the backrest mounting component and the upper part of the backrest adjustment component and transmitted to the backrest mounting plate, which improves the structural stability and reliability of the backrest assembly.

[0005] The backrest adjustment component consists of an upper section and a lower section, forming a V-shape with an opening greater than 90 degrees. This, combined with the connection and positional relationship of the backrest assembly, facilitates control of the backrest's forward movement and tilting. This allows the backrest to move forward and tilt relative to the seat assembly when in a reclining position. At this time, the center line of the upper section of the backrest adjustment component is aligned with the line connecting the backrest's installation position, ensuring that the upper section of the backrest adjustment component, together with the backrest installation component, supports the pressure from the backrest and is less prone to damage.

[0006] The inner connector described in this application consists of an inner front connector and an inner rear connector. The two ends of the inner front connector are fixedly connected to the front side of the forward moving connector of each attitude adjustment component, and the two ends of the inner rear connector are fixedly connected to the rear side of the forward moving connector of each attitude adjustment component. The structure is more stable and the overall operation is more stable.

[0007] The technical solution adopted by this application to solve the second technical problem mentioned above is as follows: The posture adjustment assembly consists of posture adjustment component one, posture adjustment component two, posture adjustment component three, posture adjustment component four, posture adjustment component five, posture adjustment component six, posture adjustment component seven, a forward connecting component, and a mounting side plate. One end of posture adjustment component one is mounted on the seat assembly, and the other end of posture adjustment component one is hinged to one end of posture adjustment component two. The other end of posture adjustment component two is hinged to one end of posture adjustment component seven through a hinge shaft between posture adjustment component two and posture adjustment component seven. The other end of posture adjustment component seven is hinged to the mounting side plate through a hinge shaft between posture adjustment component seven. One end of posture adjustment component three is connected to the mounting side plate through a hinge shaft between posture adjustment component three and posture adjustment component seven. The posture adjustment component is hinged to posture adjustment component two via a hinge shaft. The other end of posture adjustment component three is hinged to one end of posture adjustment component four. The other end of posture adjustment component four is hinged to the mounting side plate via a hinge shaft. One end of posture adjustment component five is hinged to the leg assembly. The other end of posture adjustment component five is hinged to posture adjustment component six via a hinge shaft. Posture adjustment component six is ​​mounted on the seat assembly via a mounting shaft. Posture adjustment component six is ​​hinged to a forward-moving connector via a hinge shaft. The forward-moving connector is fixedly connected to the inner connecting component. The posture adjustment assembly is mounted on the electric seat frame via the mounting side plate. The overall structure of the posture adjustment assembly in this application is relatively simple, eliminating the backrest return spring. When in a reclining position, the backrest moves forward relative to the seat assembly, preventing the user's head from hitting objects behind them, thus improving comfort, reliability, and stability.

[0008] The seat assembly described in this application is provided with limit one and limit two. When the leg assembly is extended into position, posture adjustment component one touches limit one to restrict it from continuing to swing backward, and posture adjustment component five touches limit two to restrict it from continuing to swing backward, thereby making the posture adjustment component, seat assembly, and leg assembly relatively fixed in the TV posture and lying posture.

[0009] The seat assembly includes a seat mounting plate and a backrest mounting plate, which are fixedly connected by bolts for easy installation, disassembly and maintenance.

[0010] Compared with the prior art, this application has the following advantages and effects: the structure of this application is simple and the reliability and stability are good. Attached Figure Description

[0011] Figure 1 This is a schematic diagram illustrating the main defects of existing technology.

[0012] Figure 2 This is a schematic diagram of the sitting posture from the outside of an embodiment of this application.

[0013] Figure 3 This is a schematic diagram of the TV pose outside an embodiment of this application.

[0014] Figure 4This is a schematic diagram of the lying position from the outside in an embodiment of this application.

[0015] Figure 5 This is a partial three-dimensional schematic diagram of the seated posture in Embodiment 1 of this application.

[0016] Figure 6 This is a partial three-dimensional schematic diagram of the TV pose in Embodiment 1 of this application.

[0017] Figure 7 This is a partial three-dimensional schematic diagram of the lying posture in Embodiment 1 of this application.

[0018] Figure 8 This is a three-dimensional schematic diagram of the seated posture in Embodiment 2 of this application.

[0019] Figure 9 This is a three-dimensional schematic diagram of the TV pose of Embodiment 2 of this application.

[0020] Figure 10 This is a three-dimensional schematic diagram of the lying posture in Embodiment 2 of this application.

[0021] Figure label:

[0022] 1-Seating assembly; 11-Seating mounting plate; 111-Posture adjustment component six mounting shaft; 112-Limit one; 113-Limit two; 12-Backrest mounting plate; 121-Backrest mounting component mounting shaft; 122-Backrest adjustment component one mounting shaft; 2-Backrest assembly; 21-Backrest component; 211-Backrest component mounting position connection line (the line connecting the centers of the two hinge shafts of the backrest component, backrest mounting component, and backrest adjustment component one); 22-Backrest mounting component; 23-Backrest adjustment component one; 231-Upper section of backrest adjustment component one; 232-Lower section of backrest adjustment component one; 24-Backrest adjustment component two; Backrest adjustment component two hinge shaft 241; Backrest adjustment component two mounting shaft 242; 3-Leg assembly; 4-Drive device; 5-Connection Components; 51 - Drive rod; 52 - Rear connector; 53 - Inner connector; 531 - Inner front connector; 532 - Inner rear connector; 7 - Attitude adjustment assembly; 71 - Attitude adjustment component one; 72 - Attitude adjustment component two; 721 - Attitude adjustment component two and attitude adjustment component seven hinge shaft; 722 - Attitude adjustment component two and attitude adjustment component three hinge shaft; 73 - Attitude adjustment component three; 74 - Attitude adjustment component four; 75 - Attitude adjustment component five; 76 - Attitude adjustment component six; 761 - Attitude adjustment component five hinge shaft; 762 - Forward movement connector hinge shaft; 77 - Attitude adjustment component seven; 78 - Forward movement connector; 79 - Mounting side plate; 791 - Attitude adjustment component four hinge shaft; 792 - Attitude adjustment component seven hinge shaft. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the accompanying drawings and embodiments. These embodiments are illustrative of the present application, but the present application is not limited to them. The terms used in this application are relative to... Figure 2 In other words, Figure 2 Right is front, left is back.

[0024] See Figures 2 to 10In this application embodiment, one end of the drive device 4 (specifically a motor) is mounted on the rear connector 52, and the other end of the drive device 4 drives the drive rod 51 to move accordingly, thereby driving the entire electric seat mechanical extension device to adjust its posture. It mainly includes two symmetrically arranged mechanical extension units and a connecting assembly 5. Each mechanical extension unit mainly includes a seat assembly 1, a backrest assembly 2, a leg assembly 3, and a posture adjustment assembly 7 for controlling the seat posture adjustment. The seat assembly 1 includes a fixedly connected seat mounting plate 11 and a backrest mounting plate 12. Compared to the prior art, the improvements in this application are mainly in the backrest assembly 2 and the posture adjustment assembly 7. The backrest assembly 2 consists of a backrest piece 21 and a backrest... The mounting component 22, backrest adjustment component one 23, and backrest adjustment component two 24 are composed of the posture adjustment assembly 7, which is composed of posture adjustment component one 71, posture adjustment component two 72, posture adjustment component three 73, posture adjustment component four 74, posture adjustment component five 75, posture adjustment component six 76, posture adjustment component seven 77, forward connecting component 78, and mounting side plate 79. The backrest component 21 is hinged to one end of the backrest mounting component 22 and the backrest adjustment component one 23, respectively. The other end of the backrest mounting component 22 is hinged to the backrest mounting plate 12 of the seat assembly 1 through the backrest mounting component mounting shaft 121. The middle part of the backrest adjustment component one 23 is mounted on the backrest mounting plate 12 of the seat assembly 1 through the backrest adjustment component one mounting shaft 122. The other end is hinged to one end of the backrest adjuster 24 via the hinge shaft 241 of the backrest adjuster 2, and the other end of the backrest adjuster 24 is hinged to the mounting side plate 79 via the mounting shaft 242 of the backrest adjuster 2; one end of the posture adjuster 1 71 is mounted on the seat mounting plate 11, and the other end of the posture adjuster 1 71 is hinged to one end of the posture adjuster 2 72, and the other end of the posture adjuster 2 72 is hinged to one end of the posture adjuster 77 via the hinge shaft 721 of the posture adjuster 2 and posture adjuster 7, and the other end of the posture adjuster 77 is hinged to the mounting side plate 79 via the hinge shaft 792 of the posture adjuster 7, and one end of the posture adjuster 3 73 is hinged to the posture adjuster 2 via the hinge shaft 722 of the posture adjuster 3 and posture adjuster 77. On the second 72, the other end of the posture adjustment component three 73 is hinged to one end of the posture adjustment component four 74. The other end of the posture adjustment component four 74 is hinged to the mounting side plate 79 through the posture adjustment component four hinge shaft 791. One end of the posture adjustment component five 75 is hinged to the leg assembly 3. The other end of the posture adjustment component five 75 is hinged to the posture adjustment component six 76 through the posture adjustment component five hinge shaft 761. The posture adjustment component six 76 is mounted on the seat assembly 1 through the posture adjustment component six mounting shaft 111. The posture adjustment component six 76 is hinged to the forward connecting component 78 through the forward connecting component hinge shaft 762. The forward connecting component 78 is fixedly connected to the inner connecting component 53. The mounting side plate 79 is fixed to the prior art electric seat frame (not shown in the figure).When this embodiment changes from a TV position to a reclining position, the drive device 4 drives the seat assembly 1 to move forward and lift relative to the mounting side plate 79. The seat assembly 1 then drives the backrest assembly 2 to move forward. The other end (lower end) of the backrest adjustment member 23 is restricted by the backrest adjustment member 24 and the mounting side plate 79 and moves backward relative to one end (upper end) of the backrest adjustment member 23, so that one end of the backrest adjustment member 23 moves forward and downward, and the backrest member 21 tilts backward (see). Figure 4 The pressure on the user's backrest is distributed and transmitted to the backrest mounting plate 12 by the upper part of the backrest mounting component 22 and the backrest adjustment component 1 23, which improves the structural stability and reliability of the backrest assembly 2. The overall structure of the backrest assembly 2 and posture adjustment component 7 in this application is relatively simple, omitting the connecting component 2 in the prior art and eliminating the backrest return spring. When in a reclining position, the backrest component 21 moves forward relative to the seat assembly 1 to prevent the user's head from hitting objects behind, thus improving comfort, reliability, and stability.

[0025] The backrest adjustment component 23 of this application consists of an upper section 231 and a lower section 232, forming a V-shape with an opening greater than 90 degrees. This, combined with the relevant connection positions of the backrest assembly 2, facilitates the control of the backrest component 21 to move forward and tilt, thereby allowing the backrest component 21 to move forward relative to the seat assembly 1 when in a reclining position, forming... Figure 4 When the backrest component 21 is moved forward and tilted, the center line of the upper section 231 of the backrest adjustment component and the connecting line 211 of the backrest component installation position are on the same straight line, so that the upper section 231 of the backrest connector and the backrest mounting component 22 jointly support the pressure from the backrest component 21 and are not easily damaged.

[0026] The basic structure of Embodiment 1 and Embodiment 2 of this application is the same, the only difference being that the inner connecting member 53 in Embodiment 1 is composed of an inner front connecting member 531 and an inner rear connecting member 532. The two ends of the inner front connecting member 531 are fixedly connected to the front sides of the two forward moving connecting members 78, and the two ends of the inner rear connecting member 532 are fixedly connected to the rear sides of the two forward moving connecting members 78, making the structure more stable and the overall operation more stable. Embodiment 2 uses only one inner connecting member 53, and the two ends of the inner connecting member 53 are fixedly installed on the front of the two forward moving connecting members 78.

[0027] The seat mounting plate 11 of this application is provided with limit one 112 and limit two 113. When the leg assembly 3 is extended into place, the posture adjustment component 71 touches the limit one 112 to limit it from continuing to swing backward, and the posture adjustment component 75 touches the limit two 113 to limit it from continuing to swing backward, so that the posture adjustment component 7, the seat assembly 1, and the leg assembly 3 are relatively fixed in the TV posture and the lying posture.

[0028] When transitioning from a TV-like posture to a reclining posture, the drive device 1 causes the rear of the seat assembly 1 to lift and move forward, and the backrest assembly 2 also moves forward as a whole. At the same time, the leg assembly 3 is restricted and cannot continue to unfold, causing the seat assembly 1, backrest assembly 2, and leg assembly 3 to move forward as a whole relative to the mounting side plate 79, and the backrest 21 to tilt backward, ultimately forming... Figure 4 , Figure 7 , Figure 10 The lying position shown.

[0029] Leg assembly 3 and other parts not described herein are prior art or substantially the same as those in prior art documents, and will not be described in detail here. 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 electric seat mechanical extension device, comprising two symmetrically arranged mechanical extension units and a connecting assembly connecting the two mechanical extension units, each mechanical extension unit comprising a seat assembly, a backrest assembly, and a posture adjustment assembly, wherein the posture adjustment assembly is mounted on an electric seat frame, and the seat assembly is mounted on the posture adjustment assembly, characterized in that: The backrest assembly consists of a backrest component, a backrest mounting component, a backrest adjustment component one, and a backrest adjustment component two. The backrest component is hinged to one end of the backrest mounting component and one end of the backrest adjustment component one. The other end of the backrest mounting component is hinged to the seat assembly via a mounting shaft. The middle part of the backrest adjustment component one is mounted on the seat assembly via a mounting shaft. The other end of the backrest adjustment component one is hinged to one end of the backrest adjustment component two via a hinge shaft. The other end of the backrest adjustment component two is hinged to the posture adjustment assembly via a mounting shaft.

2. The power seat mechanical extension device of claim 1, wherein: The backrest adjustment component consists of an upper section and a lower section, and the whole is V-shaped with an opening greater than 90 degrees.

3. The power seat mechanical extension apparatus according to claim 2, wherein: When in a reclining position, the center line of the upper section of the backrest adjustment component and the connection line of the backrest component installation position are on the same straight line.

4. The power seat mechanical extension apparatus of claim 1 wherein: The posture adjustment assembly comprises posture adjustment component one, posture adjustment component two, posture adjustment component three, posture adjustment component four, posture adjustment component five, posture adjustment component six, posture adjustment component seven, a forward connecting component, and a mounting side plate. One end of posture adjustment component one is mounted on the seat assembly, and the other end of posture adjustment component one is hinged to one end of posture adjustment component two. The other end of posture adjustment component two is hinged to one end of posture adjustment component seven via a hinge shaft between posture adjustment component two and posture adjustment component seven. The other end of posture adjustment component seven is hinged to the mounting side plate via a hinge shaft between posture adjustment component seven and posture adjustment component seven. One end of posture adjustment component three is connected to posture adjustment component two via a hinge shaft between posture adjustment component two and posture adjustment component seven. The three hinge shafts are hinged to the posture adjustment component two. The other end of the posture adjustment component three is hinged to one end of the posture adjustment component four. The other end of the posture adjustment component four is hinged to the mounting side plate through the posture adjustment component four hinge shaft. One end of the posture adjustment component five is hinged to the leg assembly. The other end of the posture adjustment component five is hinged to the posture adjustment component six through the posture adjustment component five hinge shaft. The posture adjustment component six is ​​mounted on the seat assembly through the posture adjustment component six mounting shaft. The posture adjustment component six is ​​hinged to the forward moving connector through the forward moving connector hinge shaft. The forward moving connector is fixedly connected to the inner side connector. The posture adjustment components are mounted on the electric seat frame through the mounting side plate.

5. The power seat mechanical extension apparatus of claim 1 wherein: The seat assembly is provided with limit one and limit two. When the leg assembly is extended into place, posture adjustment component one touches limit one, and posture adjustment component five touches limit two.

6. The power seat mechanical extension apparatus of claim 1 wherein: The seat assembly includes a seat mounting plate and a backrest mounting plate, which are fixedly connected by bolts.

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