A car seat frame for enabling a seat to be reclined into a bed

Abstract

The utility model relates to the field of automobile seat, especially to a kind of automobile seat framework achieving seat to be laid down into bed, including cushion frame and backrest frame, the cushion frame includes bottom frame, the both sides of bottom frame are hinged with swing arm, the end of swing arm is hinged with top frame, the middle part of swing arm is hinged with connecting arm, the both ends of two connecting arms away from swing arm are rotatably connected with connecting rod, the connecting rod and top frame are fixed with mounting seat, first telescopic device is installed between two mounting seats, arc arm is hinged on bottom frame, this automobile seat framework achieving seat to be laid down into bed, cushion will not move forward in the process of seat laying flat, will not encroach on front end space, will not interfere with front seat or auxiliary instrument desk, and there is no gap at the junction of cushion and backrest, in addition, cushion can be lifted forward, can expand more functions, for example, zero gravity posture etc.

Description

Technical Field

[0001] This utility model relates to the field of automotive seats, and more particularly to an automotive seat frame that enables the seat to be folded down into a bed. Background Technology

[0002] People are using cars more frequently and for longer periods, especially when traveling, where many people need to rest or sleep in their vehicles. However, most passenger car seats currently cannot be converted into a bed; they can only be used for sitting, resulting in poor comfort. Even in vehicles with large-angle adjustments, they often cannot recline completely flat, making them unsuitable for lying down. Alternatively, when the backrest is reclined, there is a step between it and the seat cushion, causing lumbar discomfort and requiring an additional mattress. Therefore, the automotive industry is increasingly focusing on the flatness of seats when reclined.

[0003] Chinese patent number CN222973249U allows the backrest to recline flat, but there is a step between the backrest and the seat cushion after the backrest is reclined, which causes a feeling of back pressure when lying on it, requiring an additional mattress.

[0004] The second problem is that the seat cushion of existing technology usually moves forward when the seat is laid flat, which encroaches on the front space. Under certain circumstances, it is impossible to avoid interference with the front seat or the passenger dashboard, which has great limitations in practical application. In addition, there is a gap at the junction of the seat cushion and the backrest. Furthermore, the seat cushion does not lift forward, so it cannot expand more functions, such as zero-gravity posture.

[0005] Therefore, it is necessary to provide a car seat frame that enables the seats to be folded down into a bed to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a car seat frame that allows the seat to be folded down into a bed.

[0007] This utility model provides a car seat frame that allows the seat to be folded down into a bed, including a seat cushion frame and a backrest frame. The seat cushion frame includes a bottom frame, with swing arms hinged to both sides of the bottom frame. A top frame is hinged to the end of each swing arm, and a connecting arm is hinged to the middle of each swing arm. A connecting rod is rotatably connected between the ends of the two connecting arms away from the swing arms. Mounting seats are fixed on both the connecting rod and the top frame. A first telescopic device is installed between the two mounting seats. An arc-shaped arm is hinged to the bottom frame, with the end of the arc-shaped arm away from the bottom frame fixedly connected to the connecting rod. A connecting seat is hinged to the middle of one of the arc-shaped arms. A second telescopic device is installed between the bottom frame and the connecting seat.

[0008] Preferably, a drive rod is fixed to the rear end of the seat cushion frame, the seat cushion frame is hinged to the backrest frame via the drive rod, and a drive device for driving the seat cushion frame to rotate relative to the backrest frame is installed on the backrest frame.

[0009] Preferably, a square tube is fixed between the two arc-shaped arms.

[0010] Preferably, the top frame includes a U-shaped rod, the end of which is hinged to the end of the swing arm, U-shaped seats are fixed on both sides of the U-shaped rod, a connecting pipe is fixed between the U-shaped seats, and several steel bars are installed between the U-shaped seats and the connecting pipe.

[0011] Preferably, the first telescopic device includes a first geared motor, which is hinged to a mounting base on the top frame. A first lead screw is fixed to the output end of the first geared motor. A rotating seat is hinged to the mounting base on the connecting rod. A first threaded sleeve is fixed to the rotating seat. The first lead screw and the first threaded sleeve are connected by threads.

[0012] The rear end of the seat frame lifts up: The first geared motor starts, and the first lead screw at its output end engages in threaded transmission with the first threaded sleeve on the mounting seat of the connecting rod; because the first geared motor is hinged on the mounting seat of the top frame, it will drive the top frame to rotate around the hinge point at the end of the swing arm during the transmission process, ultimately causing the rear end of the top frame to lift up.

[0013] Preferably, the second telescopic device includes a second geared motor, a fixed seat is fixed on the bottom frame, the second geared motor is hinged to the fixed seat, a second lead screw is fixed to the output end of the second geared motor, a second threaded sleeve is fixed on the connecting seat, and the second lead screw and the second threaded sleeve are connected by threads.

[0014] The front end of the seat frame top frame is raised and flush with the whole structure: The second reduction motor starts, and the second lead screw at its output end and the second threaded sleeve of the connecting seat generate threaded transmission, causing the second telescopic device to extend; the connecting seat is hinged in the middle of the arc-shaped arm, and one end of the arc-shaped arm is hinged to the bottom frame and the other end is fixed to the connecting rod. Therefore, the extension of the second telescopic device will push the arc-shaped arm to swing towards the backrest frame, thereby driving the connecting rod to rise; the connecting rod is hinged to the middle of the swing arm through the connecting arm. The rise of the connecting rod will drive the connecting arm to rotate, and finally drive the top frame to rotate further around the hinge point at the end of the swing arm, causing the front end of the top frame to rise; at this point, the top frame and the flattened backrest frame are fully flush together, completing the transformation of the "seat into bed".

[0015] Preferably, the drive device includes a third geared motor fixed on the backrest frame, a gear assembly is installed at the output end of the third geared motor, and gear teeth are provided on the middle side wall of the drive rod, with the gear assembly meshing with the gear teeth.

[0016] Backrest frame flattening operation: After the third reduction motor starts, the gear assembly at its output end meshes with the gear teeth on the side wall of the drive rod, driving the drive rod to rotate; since the seat cushion frame is hinged to the backrest frame through the drive rod, the rotation of the drive rod will cause the seat cushion frame and the backrest frame to rotate relative to each other, ultimately achieving the backrest frame to rotate flat, laying the foundation for the subsequent "bed assembly".

[0017] Preferably, a reinforcing rod is installed between the two connecting arms.

[0018] Compared with related technologies, the present invention provides the following beneficial effects: By using a design that allows the backrest to fold flat and the seat cushion to be raised and level, the car seat can be transformed from a single seating function into a flat bed. It is suitable for long-distance driving rest, outdoor camping and other scenarios, which greatly enhances the utilization value of the car's interior space and meets the diverse needs of users.

[0019] When the seat is laid flat, the seat cushion will not move forward, will not encroach on the front space, and will not interfere with the front seats or the passenger dashboard. There is no gap at the junction of the seat cushion and the backrest. In addition, the seat cushion can be raised forward to expand more functions, such as zero-gravity posture. Attached Figure Description

[0020] Figure 1 This is a side view of the overall flattened structure of this utility model; Figure 2 This is a schematic diagram of the overall flattening structure of this utility model; Figure 3 This is a schematic diagram of the normal state of this utility model; Figure 4 This is a schematic diagram of the first telescopic device of this utility model; Figure 5 This is a schematic diagram of the bottom structure of the platform panel of this utility model; Figure 6 This is a schematic diagram of the backrest frame structure of this utility model; Figure 7 This is a schematic diagram of the top frame structure of this utility model.

[0021] The following are the labeling elements in the diagram: 1. Seat cushion frame; 2. Backrest frame; 3. Bottom frame; 4. Swing arm; 5. Top frame; 6. Connecting arm; 7. Connecting rod; 8. Mounting seat; 9. First telescopic device; 10. Arc arm; 11. Connecting seat; 12. Second telescopic device; 13. Drive rod; 14. Drive device; 15. Square tube; 16. U-shaped rod; 17. U-shaped seat; 18. Connecting pipe; 19. Reinforcing bar; 20. First geared motor; 21. First lead screw; 22. First threaded sleeve; 23. Second geared motor; 24. Fixed seat; 25. Second lead screw; 26. Second threaded sleeve; 27. Third geared motor; 28. Gear assembly; 29. ​​Gear teeth; 30. Reinforcing rod; 31. Rotating seat. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Please refer to the following: Figures 1 to 7 A car seat frame that allows the seat to be folded down into a bed. The core of the seat frame includes a seat cushion frame 1 and a backrest frame 2. The various components form a coordinated transmission system through hinges, fixation, and other means. The specific structure is as follows: Composition and connection of seat cushion frame 1: The seat frame 1 is supported by a bottom frame 3. Both sides of the bottom frame 3 are hinged to swing arms 4, and the ends of the swing arms 4 are hinged to a top frame 5. A connecting arm 6 is also hinged to the middle of the swing arms 4. To enhance the structural stability of the connecting arms 6, a reinforcing rod 30 is installed between the two connecting arms 6. A connecting rod 7 is rotatably connected between the ends of the two connecting arms 6 away from the swing arms 4. Mounting seats 8 are fixed to both the connecting rod 7 and the top frame 5. A first telescopic device 9 for driving the adjustment of the top frame 5 is installed between the two mounting seats 8. Meanwhile, an arc-shaped arm 10 is hinged to the bottom frame 3. The end of the arc-shaped arm 10 away from the bottom frame 3 is fixedly connected to the connecting rod 7. To improve the linkage consistency of the arc-shaped arm 10, a square tube 15 is fixed between the two arc-shaped arms 10. A connecting seat 11 is hinged to the middle of one of the arc-shaped arms 10. A second telescopic device 12 is installed between the bottom frame 3 and the connecting seat 11 to drive the arc-shaped arm 10 to swing. The top frame 5 serves as the core support for the seat cushion frame 1. Specifically, it includes a U-shaped rod 16, the end of which is hinged to the end of the swing arm 4. U-shaped seats 17 are fixed on both sides of the U-shaped rod 16, and connecting pipes 18 are fixed between the U-shaped seats 17. Several steel bars 19 are installed between the U-shaped seats 17 and the connecting pipes 18 to form a stable bearing surface. Connection and drive of seat cushion frame 1 and backrest frame 2: A drive rod 13 is fixed to the rear end of the seat cushion frame 1 and is hinged to the backrest frame 2 through the drive rod 13. A drive device 14 for driving the seat cushion frame 1 to rotate relative to the backrest frame 2 is installed on the backrest frame 2. The drive device 14 includes a third geared motor 27 fixed on the backrest frame 2. A gear assembly 28 is installed at the output end of the third geared motor 27. A gear tooth 29 is provided on the middle side wall of the drive rod 13. The gear assembly 28 meshes with the gear tooth 29 to realize power transmission. The specific structure of the telescopic device: The first telescopic device 9 includes a first reduction motor 20, which is hinged to a mounting base 8 on the top frame 5. A first lead screw 21 is fixed to the output end of the first reduction motor 20. A rotating seat 31 is hinged to the mounting base 8 on the connecting rod 7. A first threaded sleeve 22 is fixed to the rotating seat 31. The first lead screw 21 and the first threaded sleeve 22 are connected by threads, and the local adjustment of the top frame 5 is realized through thread transmission. The second telescopic device 12 includes a second reduction motor 23, a fixed base 24 fixed on the bottom frame 3, the second reduction motor 23 is hinged to the fixed base 24, the output end of the second reduction motor 23 is fixed with a second lead screw 25, and a second threaded sleeve 26 is fixed on the connecting seat 11. The second lead screw 25 and the second threaded sleeve 26 are connected by threads to provide power for the swing of the arc arm 10. II. Working Principle of "Seats Folding Down into Beds" The frame achieves stable shape transformation through a three-step process: "backrest folding flat - seat cushion segmented lifting - overall flat connection," with no seat cushion shifting forward or gaps throughout the entire process. The specific process is as follows: Backrest reclining operation: When the conversion function needs to be activated, the third reduction motor 27 is activated first. The gear assembly 28 at the output end of the third reduction motor 27 meshes with the gear teeth 29 on the side wall of the drive rod 13, thereby driving the drive rod 13 to rotate around its own axis. Since the seat cushion frame 1 is hinged to the backrest frame 2 through the drive rod 13, the rotation of the drive rod 13 will drive the seat cushion frame 1 and the backrest frame 2 to rotate relative to each other along the hinge point, eventually making the backrest frame 2 rotate smoothly and flat, preparing for the subsequent flat connection with the seat cushion frame 1. The rear end of the seat cushion top frame is raised: After the backrest frame 2 is folded flat, the first reduction motor 20 is started. The first lead screw 21 at the output end of the first reduction motor 20 and the first threaded sleeve 22 undergo threaded transmission. Since the first reduction motor 20 is hinged to the mounting seat 8 of the top frame 5, a thrust along the axial direction of the lead screw will be generated during the threaded transmission, which will drive the top frame 5 to rotate slowly around the hinge point at the end of the swing arm 4, and finally lift the rear end of the top frame 5 upward. During this process, since the hinge position of the bottom frame 3 and the swing arm 4 is fixed, the seat cushion frame 1 as a whole does not have a forward movement tendency, thus avoiding encroachment on the front space. The front end of the seat cushion frame top is raised and flush with the rest of the frame. Next, the second reduction motor 23 is started. The second lead screw 25 at the output end of the second reduction motor 23 engages in threaded transmission with the second threaded sleeve 26 of the connecting seat 11, causing the second telescopic device 12 to extend along the lead screw direction. Since the connecting seat 11 is hinged to the middle of the arc-shaped arm 10, and one end of the arc-shaped arm 10 is hinged to the bottom frame 3 and the other end is fixed to the connecting rod 7, the extension of the second telescopic device 12 will generate an outward thrust on the arc-shaped arm 10, driving the arc-shaped arm 10 to swing smoothly towards the backrest frame 2, thereby driving the arc-shaped arm 10 to move smoothly towards the backrest frame 2. The connecting rod 7, which is fixedly connected, is raised upwards. The connecting rod 7 is hinged to the middle of the swing arm 4 through the connecting arm 6. The raising of the connecting rod 7 will drive the connecting arm 6 to rotate around the hinge point, which in turn will drive the top frame 5 to continue to rotate around the hinge point at the end of the swing arm 4, so that the front end of the top frame 5 is also raised upwards. Finally, the rear end and the front end of the top frame 5 are both raised to the same height as the backrest frame 2 after it is flattened, and the junction of the rear end of the top frame 5 and the lower end of the backrest frame 2 is completely fitted together, realizing the complete flat connection between the seat cushion frame 1 and the backrest frame 2, and successfully completing the transformation of the "seat into bed". Seat cushion forward lifting and functional expansion (such as zero-gravity posture): To achieve extended functions such as zero-gravity posture, the output speed and direction of the second reduction motor 23 can be controlled separately to adjust the extension of the second telescopic device 12. When the second telescopic device 12 is extended appropriately, the height of the arc arm 10 driving the connecting rod 7 to lift only acts on the front end of the top frame 5, so that the top frame 5 forms an inclined posture with "high front end and low rear end". At this time, the bearing surface composed of the U-shaped seat 17, connecting pipe 18 and steel bar 19 on the top frame 5 tilts synchronously, so that the human legs are placed in the front lifting area and the torso is close to the middle of the top frame 5, forming a comfortable angle between the legs and the torso, which meets the usage requirements of zero-gravity posture. The lifting height can also be adjusted according to the user's needs to achieve diverse sitting postures such as semi-reclining rest.

[0024] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A car seat frame that allows the seat to be folded down into a bed, characterized in that, The device includes a seat frame (1) and a backrest frame (2). The seat frame (1) includes a bottom frame (3). Both sides of the bottom frame (3) are hinged with swing arms (4). The ends of the swing arms (4) are hinged with top frames (5). The middle of the swing arms (4) is hinged with connecting arms (6). The ends of the two connecting arms (6) away from the swing arms (4) are rotatably connected with connecting rods (7). Mounting seats (8) are fixed on both the connecting rods (7) and the top frames (5). A first telescopic device (9) is installed between the two mounting seats (8). An arc arm (10) is hinged on the bottom frame (3). The end of the arc arm (10) away from the bottom frame (3) is fixedly connected to the connecting rod (7). A connecting seat (11) is hinged to the middle of one of the arc arms (10). A second telescopic device (12) is installed between the bottom frame (3) and the connecting seat (11).

2. The car seat frame for folding down into a bed according to claim 1, characterized in that, The rear end of the seat cushion frame (1) is fixed with a drive rod (13). The seat cushion frame (1) is hinged to the backrest frame (2) via the drive rod (13). The backrest frame (2) is equipped with a drive device (14) for driving the seat cushion frame (1) to rotate relative to the backrest frame (2).

3. A car seat frame for folding down into a bed according to claim 2, characterized in that, A square tube (15) is fixed between the two arc-shaped arms (10).

4. A car seat frame for folding down into a bed according to claim 2, characterized in that, The top frame (5) includes a U-shaped rod (16), the end of which is hinged to the end of the swing arm (4), and U-shaped seats (17) are fixed on both sides of the U-shaped rod (16). A connecting pipe (18) is fixed between the U-shaped seats (17), and several steel bars (19) are installed between the U-shaped seats (17) and the connecting pipe (18).

5. A car seat frame for folding down into a bed according to claim 4, characterized in that, The first telescopic device (9) includes a first geared motor (20), which is hinged to a mounting seat (8) on the top frame (5). The output end of the first geared motor (20) is fixed with a first lead screw (21). A rotating seat (31) is hinged to the mounting seat (8) on the connecting rod (7). A first threaded sleeve (22) is fixed on the rotating seat (31). The first lead screw (21) and the first threaded sleeve (22) are connected by threads.

6. A car seat frame for folding down into a bed according to claim 5, characterized in that, The second telescopic device (12) includes a second geared motor (23), a fixed seat (24) is fixed on the bottom frame (3), the second geared motor (23) is hinged on the fixed seat (24), the output end of the second geared motor (23) is fixed with a second lead screw (25), the connecting seat (11) is fixed with a second threaded sleeve (26), and the second lead screw (25) and the second threaded sleeve (26) are connected by threads.

7. A car seat frame for folding down into a bed according to claim 2, characterized in that, The drive device (14) includes a third geared motor (27) fixed on the backrest frame (2). A gear assembly (28) is installed at the output end of the third geared motor (27). The middle side wall of the drive rod (13) is provided with gear teeth (29). The gear assembly (28) meshes with the gear teeth (29).

8. A car seat frame for folding down into a bed according to claim 1, characterized in that, A reinforcing rod (30) is installed between the two connecting arms (6).

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