Cushion lifting mechanism and rear-row seat capable of lying backwards and turning forwards to be flat

Abstract

The cushion lifting mechanism comprises a lifting framework composed of an upper connecting rod, a front connecting rod and a rear connecting rod, the front connecting rod and the rear connecting rod are connected through the upper connecting rod arranged at the upper end, and the lower end of the front connecting rod and the lower end of the rear connecting rod are both rotationally fixed to a cushion framework; the upper connecting rod is connected with the seat cushion, the upper connecting rod can move forwards under the action of an electric driving assembly or a manual unlocking mechanism, and the rear connecting rod rotates forwards around a lower hinge point to push the rear part of the upper connecting rod to be lifted, so that the surface of the seat cushion is flush with the A surface of the backrest turned backwards. The connecting rod mechanism is arranged below the cushion, the cushion is lifted when the backrest is adjusted backwards, the surface of the cushion can be flush with the backrest face, the cushion can also be flush with the backrest when the backrest is turned forwards, the structure is simple, the occupied space is small, and arrangement is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of traffic seats, in particular to a cushion lifting mechanism and a rear seat which can lie flat backwards and flip flat forwards. Background Art

[0002] In order to improve the space utilization rate of vehicles and the comfort of passengers, when the seat is not occupied, the seat back can be flipped forward to facilitate the placement of items, or the seat back can be flipped backward to provide passengers with a more comfortable angle to lean on. With the development of transportation vehicles, passengers have higher requirements for seat adjustment functions and greater demand for seat comfort. Existing electric adjustable seats generally have a motor and several transmission gears on one side of the seat, and the motor drives several transmission gears to rotate to achieve the flipping of the seat. However, with this flipping structure, when the car seat is flipped, the seat cushion does not move. When the passenger flips the seat back backward, there is a certain angle deviation between the seat cushion and the backrest, which greatly affects the passenger's comfort. After flipping the seat back forward, the seat cushion and the backrest cannot fit at a certain angle, which is prone to some shaking during driving. Utility Model Content

[0003] In view of the defects of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide a seat cushion lifting mechanism and a rear seat which can realize the seat cushion being lifted and flush with the backrest when the backrest is flipped backward, and the seat cushion being in close contact with the backrest when the backrest is flipped forward.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions: a seat cushion lifting mechanism, including a lifting frame composed of an upper connecting rod, a front connecting rod and a rear connecting rod, the front connecting rod and the rear connecting rod are connected by an upper connecting rod arranged at the upper end, and the lower ends of the front connecting rod and the rear connecting rod can be rotatably fixed on the seat cushion frame; the upper connecting rod is connected to the seat cushion, and the upper connecting rod can move forward under the action of an electric drive assembly or a manual unlocking mechanism, and the rear connecting rod rotates forward around the lower hinge point to push the rear part of the upper connecting rod to lift it, so that the surface of the seat cushion is flush with the A surface of the backrest after flipping backward.

[0005] Preferably, when driven manually, the manual unlocking mechanism includes a locking shaft fixedly mounted on the seat cushion frame, and at least two locking holes provided on the rear connecting rod or the front connecting rod. When unlocking, the manual unlocking mechanism is acted upon by external force to disengage the locking shaft from the locking hole, and the seat cushion can be lifted by manually adjusting the connecting rod angle.

[0006] Preferably, the locking hole is opened on the rear connecting rod, and a raised feature is provided on the rear connecting rod. The locking shaft is installed on the seat cushion frame through a fixing block, and a guide arc groove matching the raised feature is provided on the fixing block. When the rear connecting rod rotates, the raised feature slides in the guide arc groove to realize the rotation guidance of the rear connecting rod, thereby ensuring that the locking shaft can be accurately aligned with the locking hole.

[0007] Preferably, the electric drive assembly adopts a drive motor, which is fixedly mounted on the seat frame, and the output end of the drive motor is hinged to the front connecting rod or the rear connecting rod. When the electric drive assembly is started, the electric drive assembly pushes the front connecting rod or the rear connecting rod to rotate.

[0008] Preferably, the lifting frame is arranged on the inner side of the seat cushion frame and is arranged symmetrically on the left and right sides so that the left and right sides are subjected to balanced forces.

[0009] Preferably, the upper connecting rod is connected to the seat cushion via a seat cushion support plate.

[0010] A rear seat capable of lying flat backwards and flipping flat forwards comprises a seat cushion frame and a backrest frame, wherein the backrest frame can flip forwards to achieve the fit between the backrest surface A and the seat cushion surface, and also comprises a seat cushion lifting mechanism.

[0011] The beneficial effects of the utility model are as follows: by arranging a connecting rod mechanism under the seat cushion, the seat cushion can be lifted when the backrest is adjusted backward, so that the seat cushion surface can be flush with the backrest surface, and when the backrest is flipped forward, the seat cushion can also be flush with the backrest. The structure is simple, the space occupied is small, and the layout is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the structure of the rear seats that can lie flat backwards and flip forwards;

[0013] Figure 2 It is a structural schematic diagram of the seat cushion lifting mechanism;

[0014] Figure 3 Schematic diagram of the manual drive structure of the seat cushion lifting mechanism

[0015] Figure 4 It is a schematic diagram of the driving rear connecting rod principle of the seat cushion lifting mechanism;

[0016] Figure 5 Schematic diagram of the driving front connecting rod principle of the seat lifting mechanism

[0017] Figure 6 This is a diagram of the middle state of the seat lying flat in the rear;

[0018] Figure 7 This is a diagram of the seat in a rear lying flat state;

[0019] Figure 8 This is a diagram of the seat in a forward folded flat state;

[0020] In the figure: 1-upper connecting rod, 2-front connecting rod, 3-rear connecting rod, 4-seat frame, 5-electric drive assembly, 6-seat, 7-seat support plate, 8-locking block, 8a-locking shaft, 8b-guide arc groove. DETAILED DESCRIPTION

[0021] In order to better understand the improvements made by the present invention relative to the prior art, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] like Figure 2 —3 shows a seat cushion lifting mechanism, which is mainly composed of a lifting frame consisting of an upper connecting rod 1, a front connecting rod 2 and a rear connecting rod 3. The lifting frame is arranged on the inner side of the seat cushion frame 4. In order to balance the force when lifting the seat cushion, the lifting frame arranged in the seat cushion frame 4 is arranged symmetrically on the left and right.

[0023] The front link 2 and the rear link 3 are connected by an upper link 1 arranged at the upper end, and the lower ends of the front link 2 and the rear link 3 are both rotatably fixed on the seat frame 4. The upper link 1, the front link 2, the rear link 3 and the seat frame 4 form a four-bar linkage. Among them, the upper link 1 is connected to the seat 6 through the seat support plate 7.

[0024] The upper link 1 can move forward under the action of the electric drive assembly 5 or the manual unlocking mechanism, and the rear link 3 rotates forward around the lower hinge point to push the rear part of the upper link 1 up, so that the surface of the seat cushion 6 is flush with the backrest A after flipping backward.

[0025] When manually driven, Figure 3 As shown, the manual unlocking mechanism is mainly composed of a locking shaft 8a fixedly mounted on the seat frame 4, and at least two locking holes opened on the rear connecting rod 3 or the front connecting rod 2. When unlocking, the manual unlocking mechanism can be used by external force to disengage the locking shaft 8a from the locking hole, and the seat can be lifted by manually adjusting the connecting rod angle. The locking hole is opened on the rear connecting rod 3, and the rear connecting rod 3 is provided with a raised feature. The locking shaft 8a is installed on the seat frame 4 through a fixing block 8, and a guide arc groove 8b matching the raised feature is provided on the fixing block 8. When the rear connecting rod 3 rotates, the raised feature slides in the guide arc groove 8b to realize the rotation guide of the rear connecting rod 3, ensuring that the locking shaft 8 can be accurately aligned with the locking hole.

[0026] like Figure 4-5 As shown, the electric drive assembly 5 adopts a drive motor, which is fixedly mounted on the seat frame 4. The output end of the drive motor is hinged to the front link 2 or the rear link 3. When the electric drive assembly 5 is started, the electric drive assembly 5 pushes the front link 2 or the rear link 3 to rotate.

[0027] like Figure 1 As shown in FIG. 1 , a rear seat that can lie flat backward and flip forward is mainly composed of a seat cushion frame, a backrest frame and a seat cushion lifting mechanism. The backrest frame can flip forward to achieve the fit of the backrest surface A with the seat cushion surface. Figure 6-8 shown.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A seat cushion lifting mechanism, characterized in that: The invention comprises a lifting frame composed of an upper connecting rod (1), a front connecting rod (2) and a rear connecting rod (3); the front connecting rod (2) and the rear connecting rod (3) are connected via the upper connecting rod (1) arranged at the upper end; the lower ends of the front connecting rod (2) and the rear connecting rod (3) are both rotatably fixed on the seat cushion frame (4); the upper connecting rod (1) is connected to the seat cushion (6); the upper connecting rod (1) can move forward under the action of an electric drive component (5) or a manual unlocking mechanism, and the rear connecting rod (3) rotates forward around a lower hinge point to push the rear part of the upper connecting rod (1) to lift up, thereby achieving that the surface of the seat cushion (6) is flush with the backrest A surface after being flipped backwards.

2. The seat cushion lifting mechanism according to claim 1, characterized in that: When driven manually, the manual unlocking mechanism comprises a locking shaft (8a) fixedly mounted on the seat cushion frame (4), and at least two locking holes provided on the rear connecting rod (3) or the front connecting rod (2). When unlocking, the manual unlocking mechanism is acted upon by external force, so that the locking shaft (8a) can be disengaged from the locking holes, and the seat cushion can be lifted by manually adjusting the connecting rod angle.

3. The seat cushion lifting mechanism according to claim 2, characterized in that: The locking hole is formed on the rear connecting rod (3), a raised feature is provided on the rear connecting rod (3), the locking shaft (8a) is mounted on the seat frame (4) through a fixing block (8), a guide arc groove (8b) matching the raised feature is provided on the fixing block (8), when the rear connecting rod (3) rotates, the raised feature slides in the guide arc groove (8b) to realize the rotational guidance of the rear connecting rod (3), and ensures that the locking shaft (8a) can be accurately aligned with the locking hole.

4. The seat cushion lifting mechanism according to claim 1, characterized in that: The electric drive assembly (5) uses a drive motor, which is fixedly mounted on the seat frame (4), and the output end of the drive motor is hinged to the front connecting rod (2) or the rear connecting rod (3). When the electric drive assembly (5) is started, the electric drive assembly (5) pushes the front connecting rod (2) or the rear connecting rod (3) to rotate.

5. The seat cushion lifting mechanism according to claim 1, characterized in that: The lifting frame is arranged inside the seat cushion frame (4) and is arranged symmetrically on the left and right.

6. The seat cushion lifting mechanism according to claim 1, characterized in that: The upper connecting rod (1) is connected to the seat cushion (6) via a seat cushion support plate (7).

7. A rear seat capable of lying flat backwards and flipping forwards, comprising a seat cushion frame and a backrest frame, wherein the backrest frame can flip forwards to achieve the fit between the backrest surface A and the seat cushion surface, characterized in that: It also includes a seat cushion lifting mechanism according to any one of claims 1-6.

Images