Cushion rear end part lifting structure and automobile seat thereof

Abstract

The cushion rear end lifting structure is characterized in that a cushion framework comprises two side plates, the front end of a cushion suspension is hinged between the two side plates, sliding grooves extending front and back are symmetrically formed in the two sides of the rear end of the cushion suspension, and a rear sliding connecting rod is movably inserted between the sliding grooves in the two sides; the rear sliding connecting rod is arranged on the backrest framework, the two ends of the rear sliding connecting rod are fixedly connected with driving connecting rods respectively, backrest driving grooves are symmetrically formed in the two sides of the bottom end of the backrest framework, the backrest driving grooves are arc-shaped grooves, two hinge points are distributed on each backrest driving groove at intervals, and the two hinge points can slide along the backrest driving grooves and are connected with the ends, away from the rear sliding connecting rod, of the driving connecting rods; and when the driving connecting rod slides to the rearmost end of the backrest driving groove, the backrest framework can drive the driving connecting rod to overturn backwards together, so that the rear end part of the cushion suspension is driven to be lifted. When the backrest is laid backwards, the height difference between the lower end of the backrest and the rear end of the cushion is eliminated, and the comfort of a user during lying for rest is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle seats, in particular to a structure for lifting the rear end of a seat cushion and a vehicle seat thereof. Background Art

[0002] At present, the functions of vehicle seats mainly include four aspects: providing support for passengers, providing a suitable sitting position, providing good riding comfort, and providing good restraint for passengers. With the increase in the opportunities for people to drive and travel during leisure time, the time that passengers stay in the vehicle has correspondingly become longer. Therefore, people have many new requirements for vehicle seats. For example, after a long drive, they need to rest, or there is no hotel in remote areas, then the vehicle seat will become the best choice for rest. Thus, the design and configuration of vehicle seats affect the comfort and quality of people's rest. For this reason, most vehicle manufacturers generally adopt measures such as increasing the backrest angle and lengthening the seat cushion length to improve the use comfort and quality of vehicle seats, but still cannot meet the needs of the people.

[0003] In some existing vehicles, a reclining function is usually added to the rear seats, and motors are used to control the seat cushion and backrest to adjust the sitting posture of passengers, thereby improving the riding comfort and experience of rear passengers. However, when the user reclines the backrest to rest in the non-driving state of passenger and commercial vehicles, due to the influence of the backrest rotation point, there is a height difference between the lower end of the backrest and the rear end of the seat cushion, which affects the comfort of the user when lying down and resting. Summary of the Utility Model

[0004] Aiming at the problems existing in the above-mentioned prior art, the utility model aims to provide a completely new structure for lifting the rear end of a seat cushion and a vehicle seat thereof to eliminate the height difference between the seat cushion and the backrest and improve the use comfort of the seat.

[0005] To achieve the above object, the utility model provides a structure for lifting the rear end of a seat cushion, including a backrest frame and a seat cushion frame. The seat cushion frame includes two side plates. The lower end of the backrest frame is hinged to the rear ends of the two side plates. The structure further includes a seat cushion suspension and a rear sliding link. The front end of the seat cushion suspension is hinged between the two side plates. The rear end of the seat cushion suspension is symmetrically provided with front-rear extending sliding grooves on both sides. The rear sliding link is movably inserted between the two sliding grooves, and driving links are respectively and fixedly connected to both ends thereof. The bottom ends of the two sides of the backrest frame are symmetrically provided with backrest driving grooves. The backrest driving grooves are arc-shaped grooves, on which two hinge points are arranged at intervals. Both hinge points can slide along the backrest driving grooves and are both connected to the ends of the driving links far away from the rear sliding link.

[0006] When the backrest frame flips backward, the driving link can slide relative to the backrest driving groove. When the driving link slides to the rearmost end of the backrest driving groove, the backrest frame can drive the driving link to flip backward together, thereby driving the rear sliding link to move forward along the sliding groove, and further driving the rear end of the seat cushion suspension to lift. After the backrest frame is laid flat backward, the rear end of the seat cushion suspension can be flush with the lower end of the backrest frame.

[0007] In the above solution: driving blocks are respectively welded on both sides of the bottom end of the backrest frame, and the backrest driving groove is opened on the corresponding side driving block. The structure is simple and the backrest driving groove is convenient to open.

[0008] In the above solution: the backrest driving groove includes two arc-shaped guide grooves arranged at intervals in the front and rear. The two arc-shaped guide grooves have the same size and are concentrically arranged. One end of the driving link far from the rear sliding link is respectively hinged in the two arc-shaped guide grooves, and when the backrest frame is in the designed use state, both hinge points are located at the frontmost ends of the two arc-shaped guide grooves. The design of the two hinge points can ensure that when the backrest frame flips backward, it can drive the driving link to flip backward together. Dividing the backrest driving groove into two sections, compared with the integral setting, its stability and flexibility are better, and the driving link slides more smoothly.

[0009] In the above solution: the seat cushion suspension includes two rear lifting links arranged symmetrically on the left and right. A rear lifting frame front cross beam is welded between the front ends of the two rear lifting links, and a rear lifting frame rear cross beam is welded between the rear ends of the two rear lifting links. A suspension spring is arranged between the rear lifting frame front cross beam and the rear lifting frame rear cross beam. The sliding groove is opened on the two rear lifting links. The structure is simple and the design is convenient.

[0010] In the above solution: a rear lifting rotating shaft bracket is welded on the inner wall of the side plate, and the rear lifting link is hinged to the corresponding side rear lifting rotating shaft bracket through a rotating shaft bolt. The structure is simple and the design is convenient.

[0011] In the above solution: a rear cross tube is connected between the rear ends of the two side plates. A buffer block is fixed on the driving link. When the backrest frame is in the designed use state, the buffer block abuts against the rear cross tube. When the backrest frame is in the laid-flat state, the buffer block is separated from the rear cross tube. That is, when the backrest frame flips forward from the laid-flat state to reset, the buffer block can abut against the rear cross tube to play a role of buffering and limiting.

[0012] The present utility model also proposes an automobile seat, adopting the above-mentioned structure for lifting the rear end of the seat cushion. The automobile seat is also equipped with a leg rest mechanism. After the backrest frame is laid flat backward, the leg rest mechanism can be adjusted to be flush with the front end of the seat cushion frame. That is, after the backrest frame is laid flat backward, the backrest frame, the seat cushion frame and the leg rest mechanism are all flush, and the automobile seat as a whole forms a reclining chair, which is convenient for the driver and passengers to lie down and rest.

[0013] The beneficial effects of the present utility model are as follows: The smooth lifting of the rear end of the car seat cushion is ingeniously achieved through the lifting mechanism, so that when the backrest is laid back, the height difference between the lower end of the backrest and the rear end of the seat cushion is eliminated, greatly improving the comfort of the user when lying down and resting; by means of the force generated by the backward rotation of the backrest, the rear end of the seat cushion is smoothly driven to lift, without adding additional operation procedures, without affecting the main structure layout of the existing car seat, and without affecting the normal functions and usage steps of the car seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0015] Figure 1 is a schematic diagram of the seat when the backrest frame is in the use state.

[0016] Figure 2 is a schematic diagram of the seat when the backrest frame is in the laid-back state.

[0017] Figure 3 is a schematic diagram of the lifting structure of the rear end of the seat cushion.

[0018] Figure 4 is Figure 3 exploded schematic diagram of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] As Figure 1 shown in FIG. 4, a lifting structure for the rear end of a seat cushion mainly consists of a seat cushion suspension 3, a rear sliding link 4, a backrest frame 1 and a seat cushion frame. The seat cushion frame includes two side plates 2, and the lower end of the backrest frame 1 is hinged to the rear ends of the two side plates 2.

[0020] The front end of the seat cushion suspension 3 is hinged between the two side plates 2. On both sides of the rear end of the seat cushion suspension 3, there are symmetrically arranged front-to-back extending sliding grooves 5. The rear sliding link 4 is movably inserted between the two sliding grooves 5, and driving links 6 are respectively fixedly connected to both ends thereof. On both sides of the bottom end of the backrest frame 1, there are symmetrically arranged backrest driving grooves 7. The backrest driving grooves 7 are arc-shaped grooves, and two hinge points are spacedly arranged thereon. Both hinge points can slide along the backrest driving grooves 7, and both are connected to the ends of the driving links 6 far from the rear sliding link 4.

[0021] When the backrest frame 1 rotates backward, the driving link 6 can slide relative to the backrest driving groove 7. When the driving link 6 slides to the rearmost end of the backrest driving groove 7, the backrest frame 1 can drive the driving link 6 to rotate backward together, thereby driving the rear sliding link 4 to move forward along the sliding groove 5, and further driving the rear end of the seat cushion suspension 3 to lift, so that after the backrest frame 1 is laid back, the rear end of the seat cushion suspension 3 can be flush with the lower end of the backrest frame 1.

[0022] When the driving link 6 slides from the foremost end to the rearmost end of the backrest driving groove 7, the backrest frame 1 generally flips backward by about 30°. During this process, the rear end of the seat cushion suspension 3 does not move.

[0023] Conversely, when the backrest frame 1 flips forward and returns to its original position, it can drive the rear end of the seat cushion suspension 3 to descend.

[0024] Preferably, driving blocks 8 are respectively welded to both sides of the bottom end of the backrest frame 1, and the backrest driving groove 7 is formed in the corresponding side driving block 8. The structure is simple and it is convenient to form the backrest driving groove 7.

[0025] Preferably, the backrest driving groove 7 includes two arc-shaped guide grooves 71 arranged at intervals in the front and rear. The two arc-shaped guide grooves 71 have the same size and are concentrically arranged. The ends of the driving link 6 far from the rear sliding link 4 are respectively hinged in the two arc-shaped guide grooves 71, and when the backrest frame 1 is in the designed use state (the designed use state of the backrest frame 1 is the state when the backrest frame 1 does not flip backward), both hinge points are located at the foremost ends of the two arc-shaped guide grooves 71. The design of the two hinge points can ensure that when the backrest frame 1 flips backward, it can drive the driving link 6 to flip backward together. Dividing the backrest driving groove 7 into two sections, compared with the integral setting, its stability and flexibility are better, and the driving link 6 slides more smoothly.

[0026] Preferably, the seat cushion suspension 3 includes two rear lifting links 31 arranged symmetrically on the left and right. A rear lifting frame front cross beam 32 is welded between the front ends of the two rear lifting links 31, a rear lifting frame rear cross beam 33 is welded between the rear ends of the two rear lifting links 31, a suspension spring 34 is arranged between the rear lifting frame front cross beam 32 and the rear lifting frame rear cross beam 33, and the sliding groove 5 is formed in the two rear lifting links 31. The structure is simple and the design is convenient.

[0027] Preferably, a rear lifting rotating shaft bracket 21 is welded to the inner wall of the side plate 2, and the rear lifting link 31 is hinged to the corresponding side rear lifting rotating shaft bracket 21 through a rotating shaft bolt. The structure is simple and the design is convenient.

[0028] Preferably, a rear cross tube 10 is connected between the rear ends of the two side plates 2, and a buffer block 9 is fixed on the driving link 6. When the backrest frame 1 is in the designed use state, the buffer block 9 abuts against the rear cross tube 10, and when the backrest frame 1 is in the flat state, the buffer block 9 is separated from the rear cross tube 10. That is, when the backrest frame 1 flips forward and returns to its original position from the flat state, the buffer block 9 can abut against the rear cross tube 10 to play a role in buffering and limiting.

[0029] An automotive seat adopts the above-mentioned structure for lifting the rear end of the seat cushion. The automotive seat is also equipped with a leg rest mechanism. When the backrest frame 1 is reclined backward, the leg rest mechanism can be adjusted to be flush with the front end of the seat cushion frame. That is, after the backrest frame 1 is reclined backward, the backrest frame 1, the seat cushion frame, and the leg rest mechanism are all flush, and the automotive seat as a whole forms a reclining chair, which is convenient for the driver and passengers to lie down and rest.

Claims

1. A lifting structure for the rear end of a seat cushion, comprising a backrest frame (1) and a seat cushion frame. The seat cushion frame includes two side plates (2). The lower end of the backrest frame (1) is hinged to the rear ends of the two side plates (2). It is characterized in that: It further includes a seat cushion suspension (3) and a rear sliding link (4). The front end of the seat cushion suspension (3) is hinged between the two side plates (2). On both sides of the rear end of the seat cushion suspension (3), there are symmetrically arranged front-to-back extending sliding grooves (5). The rear sliding link (4) is movably inserted between the two sliding grooves (5), and driving links (6) are respectively fixedly connected to both ends thereof. On both sides of the bottom end of the backrest frame (1), there are symmetrically arranged backrest driving grooves (7). The backrest driving grooves (7) are arc-shaped grooves, on which there are two hinge points arranged at intervals. Both hinge points can slide along the backrest driving grooves (7), and both are connected to the end of the driving link (6) far from the rear sliding link (4). When the backrest frame (1) is turned backward, the driving link (6) can slide relative to the backrest driving groove (7). When the driving link (6) slides to the rearmost end of the backrest driving groove (7), the backrest frame (1) can drive the driving link (6) to turn backward together, thereby driving the rear sliding link (4) to move forward along the sliding groove (5), and further driving the rear end of the seat cushion suspension (3) to lift, so that after the backrest frame (1) is laid flat backward, the rear end of the seat cushion suspension (3) can be flush with the lower end of the backrest frame (1).

2. The seat cushion rear end lifting structure according to claim 1, wherein: Driving blocks (8) are respectively welded on both sides of the bottom end of the backrest frame (1), and the backrest driving grooves (7) are opened on the corresponding side driving blocks (8).

3. The seat cushion rear end lifting structure according to claim 2, characterized in that: The backrest driving groove (7) includes two arc-shaped guide grooves arranged at intervals front to back. The two arc-shaped guide grooves have the same size and are concentrically arranged. The ends of the driving link (6) far from the rear sliding link (4) are respectively hinged in the two arc-shaped guide grooves, and when the backrest frame (1) is in the designed use state, both hinge points are located at the frontmost ends of the two arc-shaped guide grooves.

4. The seat cushion rear end lifting structure according to claim 1, characterized in that: The seat cushion suspension (3) includes two rear lifting links (31) arranged symmetrically left and right. A rear lifting frame front cross beam (32) is welded between the front ends of the two rear lifting links (31), and a rear lifting frame rear cross beam (33) is welded between the rear ends of the two rear lifting links (31). A suspension spring (34) is arranged between the rear lifting frame front cross beam (32) and the rear lifting frame rear cross beam (33), and the sliding grooves (5) are opened on the two rear lifting links (31).

5. The seat cushion rear end lifting structure according to claim 4, wherein: Rear lifting rotating shaft brackets (21) are welded on the inner walls of the side plates (2), and the rear lifting links (31) are hinged to the corresponding side rear lifting rotating shaft brackets (21) through rotating shaft bolts.

6. The seat cushion rear end lifting structure according to claim 4, wherein: A rear cross tube (10) is connected between the rear ends of the two side plates (2). A buffer block (9) is fixedly arranged on the driving link (6). When the backrest frame (1) is in the designed use state, the buffer block (9) abuts against the rear cross tube (10), and when the backrest frame (1) is in the laid flat state, the buffer block (9) is separated from the rear cross tube (10).

7. An automotive seat, characterized in that: Adopting the structure for lifting the rear end of the seat cushion according to any one of claims 1 - 6, the vehicle seat is further equipped with a leg rest mechanism. When the backrest frame (1) is laid flat backward, the leg rest mechanism can be adjusted to be flush with the front end of the seat cushion frame.

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