Automobile seat cushion rear end lifting device

Abstract

The utility model discloses an automobile seat cushion rear end lifting device which comprises a seat cushion framework and a supporting rod located on the rear portion of the seat cushion framework, a first rocker arm and a second rocker arm are rotationally installed in the two sides of the seat cushion framework in the width direction respectively, and the two ends of the supporting rod are rotationally connected to the far end of the first rocker arm and the far end of the second rocker arm respectively. A linkage rod is fixedly connected to the supporting rod, a driving mechanism is arranged on the seat cushion framework, and the driving mechanism is used for driving the linkage rod to drive the first rocker arm and the second rocker arm to rotate upwards. The seat cushion has the advantages that the height of the rear end of the seat cushion is increased, the height difference between the seat cushion and the backrest is made up, and the lying comfort of a user is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to a rear end lifting device for an automobile seat cushion. Background Art

[0002] With the expansion of the automobile market, both automobile manufacturers and consumers have put forward more stringent requirements on the comfort of automobile seats. The backrests of most automobile seats on the market can be folded back to be used as beds, especially the seats of mid-to-high-end models. This design is mainly for the convenience of users to rest in a lying position.

[0003] However, in the existing seat structure, since the rear end of the seat cushion support plane itself is slightly tilted downward, when the backrest is folded back, there is a certain gap between the rear end of the seat cushion and the backrest support plane, that is, the lower end of the backrest protrudes upward, and the comfort of the waist and hip area of ​​the user is poor when the user lies flat. Utility Model Content

[0004] In view of this, the utility model provides a rear end lifting device for a car seat cushion, which can make up for the height difference between the seat cushion and the backrest when the backrest is folded backward, thereby improving the comfort of the user lying flat.

[0005] To achieve the above purpose, the technical solution of the utility model is as follows:

[0006] A rear end lifting device for a car seat cushion, the key of which is: comprising a cushion frame and a support rod located at the rear of the cushion frame, wherein a first rocker arm and a second rocker arm are rotatably mounted inside the two sides of the cushion frame in the width direction, and the two ends of the support rod are rotatably connected to the far ends of the first rocker arm and the second rocker arm;

[0007] The support rod is fixedly connected with a linkage rod, and the seat cushion frame is provided with a driving mechanism, which is used to drive the linkage rod to drive the first rocker arm and the second rocker arm to rotate upward.

[0008] With the above structure, when the seat back is folded down, the driving mechanism drives the linkage rod to move upward. Since both ends of the first rocker arm and the second rocker arm are rotatably mounted, the movement of the linkage rod can link the first rocker arm and the second rocker arm to rotate upward, that is, drive the support rod to lift upward.

[0009] Preferably, the driving mechanism is mounted on the seat cushion frame via a mounting frame.

[0010] Preferably, the driving mechanism comprises a linearly movable push rod and a first motor assembly for controlling the linear movement of the push rod, and one end of the linkage rod away from the support rod is hinged to the end of the push rod;

[0011] The push rod moves linearly toward the rear end of the seat cushion frame, and can drive the first rocker arm and the second rocker arm to rotate upward under the linkage guidance of the linkage rod, so as to lift the support rod upward.

[0012] Preferably, the end of the push rod is provided with a first driving part, one end of the linkage rod is hinged to the first driving part, and the other end is fixedly welded to one end of the support rod, and the distal end of the first rocker arm is rotatably connected to the end of the linkage rod through a first step bolt.

[0013] Preferably: a first mounting through hole is provided at the end of the linkage rod, the first step bolt includes an outer baffle, a support step and a connecting column arranged in sequence along the axial direction, an assembly hole is provided at the far end of the first rocker arm, the outer baffle abuts against the outside of the assembly hole, the support step is rotatably sleeved in the assembly hole through a first friction sleeve, and the connecting column is threadedly fixed in the first mounting through hole.

[0014] Preferably, an axially thickened portion is provided at a position of the linkage rod corresponding to the first mounting through hole.

[0015] Preferably, an end cover is fixedly welded to one end of the support rod away from the linkage rod, and the distal end of the second rocker arm is rotatably connected to the end cover via a second step bolt.

[0016] Preferably: the end cover has a second mounting through hole passing through its center line, the second step bolt includes a second baffle, a second supporting step and a second connecting column arranged in sequence along the axial direction, a second assembly hole is provided at the far end of the second rocker arm, the second baffle abuts against the outside of the second assembly hole, the second supporting step is rotatably sleeved in the second assembly hole through a second friction sleeve, and the second connecting column is threadedly fixed in the second mounting through hole.

[0017] Preferably, the first motor assembly includes a nut sleeve and a motor for driving the nut sleeve to rotate, and the push rod is a screw rod and is threadedly sleeved in the nut sleeve.

[0018] Preferably, the driving mechanism comprises a swing arm whose middle part is rotatably connected to the seat frame, and a second motor assembly driving the swing arm to rotate, the rear end of the swing arm is hinged to the linkage rod, the front end of the swing arm is provided with an arc-shaped tooth portion, and the output shaft of the second motor assembly is provided with a gear meshing with the arc-shaped tooth portion;

[0019] The swing arm rotates relative to the seat cushion frame, and can drive the first rocker arm and the second rocker arm to rotate upward under the linkage guidance of the linkage rod, so as to lift the support rod upward.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] 1. With the rear end lifting device for the automobile seat cushion provided by the utility model, when the seat back is folded down, the driving mechanism drives the linkage rod to move upward. Since both ends of the first rocker arm and the second rocker arm are rotatably mounted, the movement of the linkage rod can link the first rocker arm and the second rocker arm to rotate upward, that is, drive the support rod to be lifted upward, thereby raising the height of the rear end of the seat cushion, compensating for the height difference between the seat cushion and the backrest, ensuring the comfort of the waist and hip area of ​​the user when lying flat, and improving the user's experience.

[0022] 2. The rear end lifting device for the automobile seat cushion provided by the utility model is adopted, and the driving mechanism is installed on the cushion frame through the mounting frame. The assembly can be completed without changing the automobile seat cushion frame. It is suitable for various seat structures and has the advantage of strong versatility. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a rear end lifting device for a car seat cushion;

[0024] Figure 2 Another structural schematic diagram of a rear end lifting device for a car seat cushion;

[0025] Figure 3 A reference diagram of the use status of the rear end lifting device of the car seat cushion;

[0026] Figure 4 It is a structural diagram of the lifting device (the seat cushion frame 1 is hidden);

[0027] Figure 5 It is an exploded schematic diagram of the first rocker arm 3, the linkage rod 5 and the support rod 2;

[0028] Figure 6 It is an exploded schematic diagram of the second rocker arm 9 and the support rod 2;

[0029] Figure 7 A partial cross-sectional view showing the connection relationship between the first rocker arm 3, the linkage rod 5 and the support rod 2;

[0030] Figure 8 A partial cross-sectional view showing the connection relationship between the second rocker arm 9 and the support rod 2;

[0031] Fig. 9 It is a schematic diagram of the structure of the rear end lifting device of the automobile seat cushion in the second embodiment;

[0032] Fig.10 It is a cross-sectional view of the rear end lifting device of the automobile seat cushion in the second embodiment;

[0033] Fig.11 It is an exploded schematic diagram of the driving mechanism 4 and the mounting bracket 7 in the second embodiment. DETAILED DESCRIPTION

[0034] The utility model is further described below in conjunction with embodiments and drawings.

[0035] Embodiment 1

[0036] like Figure 1 and 2 As shown, a rear end lifting device for a car seat cushion comprises a cushion frame 1, a support rod 2 is horizontally arranged at the rear of the cushion frame 1, a first rocker arm 3 and a second rocker arm 9 are rotatably mounted inside the two sides of the cushion frame 1 in the width direction, and the distal ends of the first rocker arm 3 and the second rocker arm 9 are rotatably connected to the two ends of the support rod 2, and the distal ends referred to here are the ends of the first rocker arm 3 and the second rocker arm 9 facing the rear end of the cushion frame 1. A linkage rod 5 is fixedly connected to the support rod 2, and a driving mechanism 4 is provided on the cushion frame 1, and the driving mechanism 4 can drive the linkage rod 5 to drive the first rocker arm 3 and the second rocker arm 9 to rotate upward or downward synchronously relative to the cushion frame 1.

[0037] Combination Figures 1 to 3 As shown, when the seat back is folded down, the driving mechanism 4 drives the linkage rod 5 to move upward. Since both ends of the first rocker arm 3 and the second rocker arm 9 are rotatably mounted, the movement of the linkage rod 5 can link the first rocker arm 3 and the second rocker arm 9 to rotate upward, that is, drive the support rod 2 to be lifted upward, thereby increasing the height of the rear end of the seat cushion, compensating for the height difference between the rear end of the seat cushion and the backrest, ensuring the comfort of the waist and hip area of ​​the user when lying flat, and improving the user's experience.

[0038] For further information, see Figure 3 and 4 The driving mechanism 4 includes a first motor assembly 4b and a push rod 4a. The first motor assembly 4b can drive the push rod 4a to move linearly. The end of the linkage rod 5 away from the support rod 2 is hinged to the rear end of the push rod 4a. The push rod 4a moves linearly toward the rear end of the seat cushion frame 1, and can drive the first rocker arm 3 and the second rocker arm 9 to rotate upward under the linkage guidance of the linkage rod 5, so as to lift the support rod 2 upward.

[0039] Re-attend Figure 1 , 3 In the present embodiment, the push rod 4a is arranged along the length direction of the seat cushion frame 1, and the rear end of the push rod 4a is tilted downward. The rear end of the push rod 4a is provided with a first driving part 4c, which can drive the first driving part 4c to move forward and backward when the push rod 4a moves forward and backward, and the end of the linkage rod 5 away from the support rod 2 is hinged to the end of the first driving part 4c.

[0040] Based on the above structural design, the working principle of the rear end lifting device of the automobile seat cushion is as follows: when the seat back is folded backward, the first motor assembly 4b drives the push rod 4a to move backward. Since the turning point between the first rocker arm 3 and the seat cushion frame 1, the turning point between the rear end of the first rocker arm 3 and the support rod 2, and the turning point between the front end of the linkage rod 5 and the first driving part 4c form a triangular frame, when the push rod 4a drives the first driving part 4c to move backward, the linkage rod 5 can link the first rocker arm 3 and the second rocker arm 9 to rotate upward, that is, drive the support rod 2 to lift upward (refer to Figure 3 ), thereby increasing the height of the rear end of the seat cushion, compensating for the height difference between the rear end of the seat cushion and the backrest, ensuring the comfort of the waist and hip area when the user lies flat, and improving the user experience.

[0041] Please refer to Figure 1 , 2 and 4, the first rocker arm 3 and the second rocker arm 9 are both hinged to the side of the seat cushion frame 1 through the adapter plate 6, and the first motor assembly 4b is fixedly assembled on the seat cushion frame 1 through the mounting frame 7. Such a design has the advantages of simple structure and convenient assembly. At the same time, such a structural design is suitable for a variety of car seats, and the device can be installed without changing the frame structure of the seat. In this embodiment, the first motor assembly 4b is fixed to the lower part of the mounting frame 7 by fasteners such as screws, and the upper end of the mounting frame 7 is fixedly clamped on the crossbeam at the front of the seat cushion frame 1. In addition, the mounting frame 7 can also change its structure or installation position according to the different seat frame structures, so as to adapt to seats of various structures.

[0042] Re-attend Figure 4 and Figure 7 In this embodiment, the linkage rod 5 is arranged on a side close to the first rocker arm 3, the rear end of the linkage rod 5 is fixedly welded to the right end of the support rod 2, and the rear end of the first rocker arm 3 is rotatably connected to the end of the linkage rod 5 through the first step bolt 8. With such a design, when the top rod 4a drives the first driving part 4c to move backward, it can drive the rear end of the linkage rod 5, the rear end of the first rocker arm 3, the rear end of the second rocker arm 9 and the support rod 2 to be lifted upward as a whole.

[0043] Further, such as Figure 5 and 7As shown, the end of the linkage rod 5 connected to the support rod 2 is provided with a first mounting through hole 5a, and the position of the linkage rod 5 corresponding to the first mounting through hole 5a is provided with an axial thickened portion extending toward the inside of the support rod 2. The first step bolt 8 is constructed as a stepped rivet structure, which includes an outer baffle 8a, a support step 8c and a connecting column 8b arranged in sequence along the axial direction. The connecting column 8b is fixedly inserted in the first mounting through hole 5a, and the rear end of the first rocker arm 3 is provided with an assembly hole 3a. The outer baffle 8a abuts against the outside of the assembly hole 3a, and the support step 8c is rotatably sleeved in the assembly hole 3a through the first friction sleeve a. In this embodiment, the connecting column 8b is fixedly inserted in the first mounting through hole 5a by screwing in. When the connecting column 8b is screwed into the first mounting through hole 5a, the support step 8c abuts against the outside of the first mounting through hole 5a.

[0044] For example Figure 5 and 7 As shown, the first friction sleeve a is constructed into a U-shaped structure. Such a design can protect the components and ensure the reliability of rotation, while also preventing friction between the first rocker arm 3 and the linkage rod 5.

[0045] Please refer to Figure 4 and 8 An end cover 10 is fixedly welded to the left end of the support rod 2, and the rear end of the second rocker arm 9 is rotatably connected to the end cover 10 through a second step bolt 11.

[0046] Re-attend Figure 6 and 8 , the end cover 10 has a second mounting through hole 10a that passes through its center line. In this embodiment, the second step bolt 11 has the same structure as the first step bolt 8, and includes a second baffle 11a, a second support step 11c and a second connecting column 11b that are sequentially arranged along the axial direction. The second connecting column 11b is fixedly inserted in the second mounting through hole 10a. The second rocker arm 9 is provided with a second assembly hole 9a at the far end. The second baffle 11a abuts against the outside of the second assembly hole 9a. The second support step 11c is rotatably sleeved in the second assembly hole 9a through the second friction sleeve b. In this embodiment, the second connecting column 11b is fixedly inserted in the second mounting through hole 10a by screwing in, so as to ensure that the second step bolt 11 can be fixedly connected to the end cover 10.

[0047] Further, refer to Figure 6 and 8 In this embodiment, the second friction sleeve b has the same structure as the first friction sleeve a, and both are constructed into a U-shaped structure.

[0048] In this embodiment, the rotational connection between the front ends of the two rocker arms and the seat cushion frame 1, and the rotational connection between the front end of the linkage rod 5 and the first driving part 4c can be achieved by components with the same structure as the above-mentioned first step bolt 8.

[0049] In this embodiment, the first motor assembly 4b includes a nut sleeve and a motor driving the nut sleeve to rotate, and the top rod 4a is a screw rod, which is threadedly sleeved in the nut sleeve. The motor drives the nut to rotate, and then the screw rod cooperates with the nut thread to realize the linear movement of the connecting rod, which is an existing mature technology and will not be described here.

[0050] Embodiment 2

[0051] This embodiment provides another implementation of the driving mechanism 4, such as Fig. 9 As shown, the driving mechanism 4 is arranged at the front of the seat cushion frame 1 through the mounting frame 7, and the driving mechanism 4 includes a swing arm 41 and a second motor assembly 42 driving the swing arm 41 to rotate relative to the seat cushion frame 1, wherein the swing arm 41 is arranged along the length direction of the seat cushion frame 1. The middle part of the swing arm 41 is hinged to the mounting frame 7 through a pin shaft c, and the end of the linkage rod 5 away from the support rod 2 is hinged to the rear end of the swing arm 41. When the driving mechanism 4 drives the swing arm 41 to rotate, it can drive the linkage rod 5 to rotate upward, thereby linking the first rocker arm 3 and the second rocker arm 9 to rotate upward, that is, driving the support rod 2 to lift upward.

[0052] Further, combined with Fig.10 and 11 As shown, the second motor assembly 42 includes a motor 421, and a gear 422 is provided on the output shaft of the motor 421. The outer end of the gear 422 is rotatably supported on the mounting frame 7 through the mounting shaft d. The front part of the swing arm 41 has a fan-shaped hole 411, and the fan-shaped hole 411 is mounted on the gear 422. An arc-shaped tooth portion 412 is provided on the inner wall of the front side of the fan-shaped hole 411. The arc-shaped tooth portion 412 is meshed with the gear 422. The motor 421 drives the gear 422 to rotate, that is, the swing arm 41 can be driven to rotate upward or downward through the arc-shaped tooth portion 412.

[0053] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make a variety of similar expressions without violating the purpose and claims of the present invention, and such changes fall within the scope of protection of the present invention.

Claims

1. A rear end lifting device for a car seat cushion, characterized in that: It comprises a seat cushion frame (1) and a support rod (2) located at the rear of the seat cushion frame (1), wherein a first rocker arm (3) and a second rocker arm (9) are rotatably mounted inside the two sides of the seat cushion frame (1) in the width direction, and the two ends of the support rod (2) are rotatably connected to the far ends of the first rocker arm (3) and the second rocker arm (9); A linkage rod (5) is fixedly connected to the support rod (2), and a driving mechanism (4) is provided on the seat cushion frame (1). The driving mechanism (4) is used to drive the linkage rod (5) to drive the first rocker arm (3) and the second rocker arm (9) to rotate upward.

2. The rear end lifting device for a car seat cushion according to claim 1, characterized in that: The driving mechanism (4) is mounted on the seat cushion frame (1) via a mounting frame (7).

3. The rear end lifting device of a car seat cushion according to claim 1, characterized in that: The driving mechanism (4) comprises a linearly movable push rod (4a) and a first motor assembly (4b) for controlling the linear movement of the push rod (4a); an end of the linkage rod (5) away from the support rod (2) is hinged to the end of the push rod (4a); The push rod (4a) moves linearly toward the rear end of the seat cushion frame (1) and can, under the linkage guidance of the linkage rod (5), drive the first rocker arm (3) and the second rocker arm (9) to rotate upwards, so that the support rod (2) is lifted upwards.

4. The rear end lifting device for a car seat cushion according to claim 3, characterized in that: The end of the push rod (4a) is sleeved with a first driving part (4c); one end of the linkage rod (5) is hinged to the first driving part (4c); the other end is fixedly welded to one end of the support rod (2); and the distal end of the first rocker arm (3) is rotatably connected to the end of the linkage rod (5) via a first step bolt (8).

5. The rear end lifting device for a car seat cushion according to claim 4, characterized in that: A first mounting through hole (5a) is provided at the end of the linkage rod (5); the first step bolt (8) comprises an outer baffle (8a), a support step (8c) and a connecting column (8b) which are sequentially arranged along the axial direction; an assembly hole (3a) is provided at the far end of the first rocker arm (3); the outer baffle (8a) abuts against the outside of the assembly hole (3a); the support step (8c) is rotatably sleeved in the assembly hole (3a) through a first friction sleeve (a); and the connecting column (8b) is threadedly fixed in the first mounting through hole (5a).

6. The rear end lifting device for a car seat cushion according to claim 5, characterized in that: The linkage rod (5) is provided with an axially thickened portion at a position corresponding to the first mounting through hole (5a).

7. The rear end lifting device for a car seat cushion according to claim 4, characterized in that: An end cover (10) is fixedly welded to one end of the support rod (2) away from the linkage rod (5), and the distal end of the second rocker arm (9) is rotatably connected to the end cover (10) via a second step bolt (11).

8. The rear end lifting device for a car seat cushion according to claim 7, characterized in that: The end cover (10) has a second mounting through hole (10a) passing through its center line; the second step bolt (11) comprises a second baffle (11a), a second supporting step (11c) and a second connecting column (11b) arranged in sequence along the axial direction; a second assembly hole (9a) is provided at the far end of the second rocker arm (9); the second baffle (11a) abuts against the outside of the second assembly hole (9a); the second supporting step (11c) is rotatably sleeved in the second assembly hole (9a) through a second friction sleeve (b); and the second connecting column (11b) is threadedly fixed in the second mounting through hole (10a).

9. The rear end lifting device of a car seat cushion according to claim 3, characterized in that: The first motor assembly (4b) comprises a nut sleeve and a motor for driving the nut sleeve to rotate; the push rod (4a) is a screw rod and is threadedly sleeved in the nut sleeve.

10. The rear end lifting device of a car seat cushion according to claim 1, characterized in that: The driving mechanism (4) comprises a swing arm (41) whose middle portion is rotatably connected to the seat cushion frame (1), and a second motor assembly (42) for driving the swing arm (41) to rotate; the rear end of the swing arm (41) is hinged to the linkage rod (5), and the front end is provided with an arc-shaped tooth portion (412); and the output shaft of the second motor assembly (42) is provided with a gear (422) meshing with the arc-shaped tooth portion (412); The swing arm (41) rotates relative to the seat cushion frame (1) and can, under the linkage guidance of the linkage rod (5), drive the first rocker arm (3) and the second rocker arm (9) to rotate upward, so that the support rod (2) is lifted upward.

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