Automobile seat capable of being independently transformed into bed

Abstract

The invention discloses an automobile seat capable of being independently transformed into a bed, which comprises a base, a seat cushion assembly is arranged on the base, a backrest is arranged at the rear end of the seat cushion assembly, a swing arm extending towards the base is arranged on the side part of the backrest, the lower end of the swing arm is rotatably connected with the base, and the swing arm rotates forwards relative to the base. The backrest can be flatly turned forwards and is connected to the front end of the seat cushion assembly; the seat cushion assembly comprises an upper-layer seat cushion and a lower-layer seat cushion which are arranged in an up-down overlapped mode, and the upper-layer seat cushion can be overturned backwards to be in a horizontal state relative to the lower-layer seat cushion. The bed has the beneficial effect that the bed can be conveniently and quickly deformed.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, and in particular to an automobile seat which can be independently transformed into a bed. Background Art

[0002] With the rapid development of the economy, cars have become the most important means of transportation for people, and users have higher and higher requirements for cars. Users expect cars to provide multi-functional usage scenarios, such as long-distance travel, camping, etc., and cars can provide space for rest and sleep. In response to the above needs, some large SUVs and commercial vehicles have launched a large bed rest mode so that users can lie down and rest.

[0003] However, in the current automotive field, the lying rest function is usually achieved by the following methods: 1. Splicing the first row of seats and the second row of seats together to form a bed; 2. Folding the second and third row seat backrests and combining them with the trunk floor to form a bed. The above two methods require two rows of seats to be combined or combined with the trunk floor to form a bed at the same time, which is difficult to operate, has cumbersome steps, poor spatial adaptability, and many defects.

[0004] Therefore, there is an urgent need to design a seat that can be independently transformed into a bed to solve the technical problems that the current steps of transforming a car seat into a bed are complicated and the operation is difficult. Summary of the invention

[0005] In view of this, the present invention provides a car seat that can be independently transformed into a bed, which can be transformed into a bed conveniently and quickly.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows:

[0007] A car seat that can be independently transformed into a bed comprises a base, a seat cushion assembly is arranged on the base, and a backrest is arranged at the rear end of the seat cushion assembly. The key points are: a swing arm extending toward the base is provided on the side of the backrest, and the lower end of the swing arm is rotatably connected to the base. The swing arm rotates forward relative to the base to enable the backrest to lie flat forward and connect to the front end of the seat cushion assembly; the seat cushion assembly comprises an upper seat cushion and a lower seat cushion which are overlapped in an upper and lower manner, and the upper seat cushion can be flipped backward to a horizontal state relative to the lower seat cushion.

[0008] With the above structure, when the car seat is in the sitting position, the lower seat cushion and the upper seat cushion are arranged overlappingly to ensure the normal use of the seat function. When the user needs to lie down to rest, the swing arm is rotated forward with the base as the rotation fulcrum, which can drive the swing arm and the backrest at its upper end to flip as a whole, so that the backrest is tilted forward and connected to the front end of the seat cushion assembly, and then the upper seat cushion is flipped backward to a horizontal state. At this time, the backrest, the lower seat cushion and the upper seat cushion are connected to form a bed.

[0009] Preferably, the base is provided with a first driving mechanism for driving the lower end of the swing arm to rotate.

[0010] Preferably, a flipping drive mechanism is provided between the upper seat cushion and the lower seat cushion, for driving the upper seat cushion to flip backward relative to the lower seat cushion.

[0011] Preferably, the flipping drive mechanism comprises a drive assembly, a first gear fixedly mounted at the rear end of the lower seat cushion, a second gear rotatably mounted at the rear end of the upper seat cushion, and a retaining frame; the drive assembly is used to drive the second gear to rotate around the circumference of the first gear;

[0012] The two ends of the retaining frame are respectively rotatably sleeved on the axial centers of the first gear and the second gear, so that the second gear and the first gear can maintain a continuous meshing state.

[0013] Preferably, the driving assembly includes a third gear rotatably mounted on the rear end of the lower seat cushion and a first driver driving the third gear to rotate, the third gear is coaxially arranged with the first gear, and the third gear is meshed with the second gear.

[0014] Preferably, the transmission ratio among the first gear, the second gear and the third gear is 1:1:1.

[0015] Preferably, the side portion of the backrest is rotatably connected to the upper end of the swing arm, and an electric angle adjuster is provided between the side portion of the backrest and the upper end of the swing arm.

[0016] Preferably, the lower end of the swing arm is rotatably arranged in the middle of the length direction of the base.

[0017] Preferably, a headrest that can be folded forward is installed on the upper end of the backrest, and a second driving mechanism is provided on the backrest for driving the headrest to rotate forward and backward relative to the upper end of the backrest.

[0018] Preferably, a shielding component extending downward is provided at the lower end of the back side of the backrest, and when the backrest is laid flat forward on the front end of the seat cushion assembly, the shielding component can cover the gap between the backrest and the seat cushion assembly.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The car seat that can be independently transformed into a bed provided by the present invention is adopted. When the car seat is in a sitting state, the lower seat cushion and the upper seat cushion are arranged overlappingly. When the user needs to lie down to have a rest, the swing arm is rotated forward with the base as a rotation fulcrum, driving the swing arm and the backrest connected to the upper end thereof to flip as a whole, so that the backrest is tilted forward and connected to the front end of the seat cushion assembly, and then the upper seat cushion is flipped backward to a horizontal state. At this time, the backrest, the lower seat cushion and the upper seat cushion are connected to form a bed.

[0021] 2. The seat deformation structure has the technical advantages of easy operation, high flatness after the bed is formed, and good spatial adaptability. At the same time, the seat cushion adopts a double-layer structure design. By unfolding the upper seat cushion backward to a horizontal state, the support area of ​​the bed can be expanded, ensuring sufficient support length, so that it can adapt to users of different body shapes.

[0022] 3. The structural design of the flip drive mechanism has the advantages of high transmission efficiency and high motion precision, which improves the stability of the rotation of the upper seat cushion; secondly, during transmission, the vibration between the gears is small, which can reduce the transmission noise and improve the user experience. In addition, each gear is small in size, light in weight, and has a strong bearing capacity, which is especially suitable for use in cars with limited space.

[0023] 4. By realizing the one-button bed-forming function of the car seat, the operation steps can be reduced, the intelligence and high-end feel of the entire vehicle can be improved, and after the seat is turned into a bed, its surface is simple and flat, with the advantage of good overall appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a car seat;

[0025] Figure 2 is another structural schematic diagram of a car seat;

[0026] Figure 3 It is a schematic diagram of the structure of the car seat in the bed mode;

[0027] Figure 4 It is a schematic diagram of the internal frame structure of the car seat in the sitting position;

[0028] Figure 5 It is a schematic diagram of the structure when the lower seat cushion A2 and the upper seat cushion A3 overlap (the surface cover is hidden);

[0029] Figure 6 It is a rear view when the lower seat cushion A2 and the upper seat cushion A3 overlap (the surface cover is hidden);

[0030] Figure 7 It is a structural schematic diagram of the seat cushion assembly in the bed mode (the surface cover is hidden);

[0031] Figure 8 This is a schematic diagram showing the structure of the lower seat cushion A2 after the support plate A5 is installed (the surface cover is hidden);

[0032] Fig. 9 This is a schematic structural diagram showing another embodiment of the flip driving mechanism 4. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with embodiments and drawings.

[0034] like Figure 1 and 3 As shown, a car seat that can be independently transformed into a bed includes a base A1, a seat cushion assembly is arranged on the base A1, and a backrest 1 is arranged at the rear end of the seat cushion assembly. A swing arm 2 extending toward the base A1 is arranged on the side of the backrest 1, and the lower end of the swing arm 2 is rotatably connected to the base A1. The swing arm 2 rotates forward relative to the base A1, so that the backrest 1 can be flattened forward and connected to the front end of the seat cushion assembly. The seat cushion assembly includes an upper seat cushion A3 and a lower seat cushion A2 that are overlapped and arranged up and down, and the upper seat cushion A3 can be flipped backward to a horizontal state relative to the lower seat cushion A2.

[0035] With such a design, when the car seat is in a sitting position, the lower seat cushion A2 and the upper seat cushion A3 are arranged in an overlapping manner to ensure the normal use of the seat function. When the user needs to lie down to rest, the swing arm 2 is rotated forward with the base A1 as the rotation fulcrum, which can drive the swing arm 2 and the backrest 1 at its upper end to flip as a whole, so that the backrest 1 is tilted forward and connected to the front end of the seat cushion assembly, and then the upper seat cushion A3 is flipped backward to a horizontal state. At this time, the backrest 1, the lower seat cushion A2 and the upper seat cushion A3 are connected to form a bed. Based on this, by manually or electrically flipping the backrest 1 and the upper seat cushion A3, the car seat can be independently transformed into a bed, which has the technical advantages of convenient operation, high flatness after the bed is formed, and good spatial adaptability. At the same time, the seat cushion adopts a double-layer structure design. By unfolding the upper seat cushion A3 backward to a horizontal state, the support area of ​​the bed can be expanded, ensuring sufficient support length, so that it can adapt to users of different body shapes.

[0036] A structure for electrically controlling the backrest 1 to flatten forward and the upper seat cushion A3 to flip backward is described in detail below.

[0037] like Figure 4 As shown, the base A1 is provided with a first driving mechanism 3, which is used to drive the lower end of the swing arm 2 to rotate around the base A1. The first driving mechanism 3 drives the lower end of the swing arm 2 to rotate forward around the base A1, driving the upper end of the swing arm 2 to rotate forward with the lower end of the swing arm 2 as the rotation center, thereby driving the backrest 1 at the upper end of the swing arm 2 to fall forward to the front end of the seat cushion assembly (refer to Figure 3 ), realizing the electric control of the flipping of the backrest 1. Similarly, the first driving mechanism 3 drives the lower end of the swing arm 2 to rotate backward around the base A1, which can drive the backrest 1 to be retracted to the sitting position.

[0038] Re-attend Figure 1 and 4In this embodiment, there are two groups of swing arms 2, which are symmetrically arranged on both sides of the backrest 1. The upper ends of the two groups of swing arms 2 are respectively connected to the two sides of the lower end of the backrest 1, and the lower ends of the two groups of swing arms 2 are respectively rotatably connected to the two sides of the base A1. A first synchronization rod 8 is connected between the lower ends of the two groups of swing arms 2 and the base A1. The first driving mechanism 3 can adopt an angle adjustment driver. The first driving mechanism 3 drives the first synchronization rod 8 to rotate, which can drive the lower ends of the two groups of swing arms 2 to rotate synchronously around the base A1. In this embodiment, both groups of swing arms 2 are constructed into a curved structure, and the lower ends of the swing arms 2 are rotatably arranged in the middle of the length direction of the base A1. Such a design can increase the swing amplitude of the swing arms 2, and ensure that when the swing arms 2 rotate forward, they can drive the lower end of the backrest 1 to rotate from the rear end of the seat cushion assembly to the front end of the seat cushion assembly.

[0039] Depend on Figure 4 It can be seen that the upper end of the swing arm 2 is rotatably connected to the side of the backrest 1. The connection structure of the two sets of swing arms 2 and the backrest 1 is the same, which will not be repeated here. Electric angle adjusters 9 are provided between the two sides of the lower end of the backrest 1 and the upper ends of the two sets of swing arms 2. The electric angle adjuster 9 can drive the backrest 1 to rotate forward and backward around the upper end of the swing arm 2, so as to adjust the inclination angle of the backrest 1 when the seat is in a sitting state. When the seat is transformed into a bed, the backrest 1 can be adjusted to an upright state first, and then the swing arm 2 can be driven to rotate by the first drive mechanism 3 to drive the backrest 1 to flip forward, or the backrest 1 can be driven to flip forward first, and then the electric angle adjuster 9 can be used to drive the backrest 1 to rotate relative to the upper end of the swing arm 2 to ensure the flatness of the backrest 1 after the connection with the seat cushion assembly.

[0040] Please refer to Figure 6 A flipping drive mechanism 4 is provided between the upper seat cushion A3 and the lower seat cushion A2, and the flipping drive mechanism 4 can drive the upper seat cushion A3 to flip backward relative to the lower seat cushion A2, so that when the seat is transformed into a bed, the upper seat cushion A3 can automatically flip backward to a horizontal state relative to the lower seat cushion A2, thereby expanding the supporting area of ​​the bed.

[0041] Further, refer to Figure 5 and 7The flip driving mechanism 4 includes a driving assembly, a first gear 41 fixedly mounted on the rear end of the lower seat cushion A2, a second gear 42 rotatably mounted on the rear end of the upper seat cushion A3, and a retaining frame A4, wherein the second gear 42 is meshed with the first gear 41, and the driving assembly is used to drive the second gear 42 to rotate around the circumference of the first gear 41, so as to drive the upper seat cushion A3 to rotate around the rear end of the lower seat cushion A2. The two ends of the retaining frame A4 are respectively rotatably sleeved on the axial positions of the first gear 41 and the second gear 42, so that the second gear 42 and the first gear 41 can maintain a continuous meshing state. With such a structural design, in the sitting mode, the second gear 42 is located on the upper side of the first gear 41. Under the holding effect of the retaining frame A4, the driving assembly drives the second gear 42 to rotate backward around the circumference of the first gear 41, which can drive the rear end of the upper seat cushion A3 to rotate backward relative to the rear end of the lower seat cushion A2, so that the upper seat cushion A3 can be flipped backward to a horizontal state relative to the lower seat cushion A2, and the upper side of the flipped upper seat cushion A3 can be flush with the upper side of the lower seat cushion A2 to ensure the flatness of the surface of the upper seat cushion A3 and the lower seat cushion A2 after the upper seat cushion A3 is unfolded. With gear transmission, after stopping, the upper seat cushion A3 can be stably kept in a horizontal state by the meshing self-locking effect between the gears.

[0042] Furthermore, if Figure 5 and Figure 6 As shown, the driving assembly includes a third gear 43 rotatably mounted at the rear end of the lower seat cushion A2 and a first driver 44 driving the third gear 43 to rotate. The third gear 43 is coaxially arranged with the first gear 41, and the third gear 43 is meshed with the second gear 42. The first driver 44 drives the third gear 43 to rotate. Since the first gear 41 is fixedly mounted at the rear end of the lower seat cushion A2, and the second gear 42 is rotatably mounted at the rear end of the upper seat cushion A3, the second gear 42 is meshed with the first gear 41 and the third gear 43. Therefore, the rotation of the third gear 43 can drive the second gear 42 to rotate, and at the same time revolve around the axis of the first gear 41, that is, it can drive the upper seat cushion A3 to fall backward relative to the lower seat cushion A2. The transmission using such a structure has the advantages of high transmission efficiency and high motion precision, which improves the rotation stability of the upper seat cushion A3; secondly, during transmission, the vibration generated between the gears is small, which can reduce the transmission noise and improve the user experience. In addition, each gear is small in size, light in weight, and has a strong bearing capacity, which is particularly suitable for use in cars with limited space.

[0043] Depend on Figure 6 and 7It can be seen that in this embodiment, the number of the first gear 41, the second gear 42, the third gear 43 and the retaining frame A4 are all provided in two groups, and they correspond one to one. The two groups of first gears 41 are respectively fixed on both sides of the rear end of the lower seat cushion A2, the two groups of second gears 42 are respectively rotatably mounted on both sides of the rear end of the upper seat cushion A3, and the two groups of third gears 43 are respectively rotatably arranged on both sides of the rear end of the lower seat cushion A2. In the transmission mechanism on the same side, the third gear 43 is coaxially arranged with the first gear 41, and the third gear 43 is located inside the first gear 41, and the retaining frame A4 is arranged at the outer end, and both ends of the retaining frame A4 are rotatably connected to the axial positions of the first gear 41 and the second gear 42 through the pin a. Furthermore, a second synchronization rod 45 is connected between the third gears 43 on both sides of the lower seat cushion A2. The first driver 44 drives the second synchronization rod 45 to rotate, which can drive the two third gears 43 to rotate synchronously, thereby driving the second gears 42 on both sides of the upper seat cushion A3 to rotate while revolving around the corresponding first gear 41, thereby driving the upper seat cushion A3 to flip backward to a horizontal state.

[0044] In this embodiment, the transmission ratio between the first gear 41, the second gear 42 and the third gear 43 is 1:1:1. Such a design can ensure that the structure of the first gear 41, the second gear 42 and the third gear 43 is minimized. At the same time, after the upper seat cushion A3 and the lower seat cushion A2 are covered with the upper cover, the size of the gears can be perfectly integrated with the thickness of the upper seat cushion A3 and the lower seat cushion A2 (refer to Figure 1 and Figure 3 ) to improve the overall aesthetics of the seat. Figure 3 A shielding cover A6 is provided at the position of the gear on the side of the seat cushion assembly, which can shield and protect the components.

[0045] In addition to the above-mentioned embodiments, the flip driving mechanism 4 can also refer to Fig. 9 The flip driving mechanism 4 includes a fixed gear 46 fixedly mounted on the rear end of the lower seat cushion A2, a rotating gear 47 rotatably mounted on the rear end of the upper seat cushion A3, a rotating arm 48 rotatably arranged on the side of the lower seat cushion A2, and a second driver 49 driving the rotating arm 48 to rotate, wherein the rotating gear 47 and the fixed gear 46 can maintain meshing transmission, the rotation center of the rotating arm 48 coincides with the center line of the fixed gear 46, and the rotating arm 48 is rotatably sleeved with the revolving gear 47. The second driver 49 drives the rotating arm 48 to rotate backward around the rotation center between it and the lower seat cushion A2, which can drive the revolving gear 47 to rotate circumferentially around the fixed gear 46, thereby driving the upper seat cushion A3 to flip backward relative to the lower seat cushion A2 to a horizontal state.

[0046] Further, refer to Fig. 9, the rotating arm 48 is arranged on the outside of the fixed gear 46, and the second driver 49 has an output shaft 491, which passes through the fixed gear 46 from the inside to the outside and is fixedly connected to the rotating arm 48 on the outside. The second driver 49 drives the output shaft 491 to rotate, which can drive the rotating arm 48 to rotate. In this embodiment, the number of fixed gears 46, revolving gears 47 and rotating arms 48 is provided in two groups, and they correspond one to one. The two groups of fixed gears 46 are respectively located on both sides of the rear end of the lower seat cushion A2, and the two groups of revolving gears 47 are respectively located on both sides of the rear end of the second layer structure 2. The two ends of the output shaft 491 pass through the fixed gears 46 on both sides and are fixedly connected to the two groups of rotating arms 48 respectively. The second driver 49 drives the output shaft 491 to rotate, which can drive the rotating arms 48 on both sides of the lower seat cushion A2 to rotate synchronously.

[0047] like Figure 1 and 3 As shown, a headrest 5 that can be folded forward is installed on the upper end of the backrest 1, and a second driving mechanism 6 is provided on the backrest 1, which can drive the headrest 5 to rotate forward and backward relative to the upper end of the backrest 1. During the process of the seat being turned into a bed, the second driving mechanism 6 drives the headrest 5 to rotate forward 90 degrees, so that after the backrest 1 is flattened to the front end of the lower seat cushion A2, the headrest 5 can contact the floor of the vehicle and support the front end of the backrest 1, thereby improving the stability of the bed structure.

[0048] In order to ensure the comfort and aesthetics of the seat, the front end of the seat cushion assembly usually has a certain curvature. When the backrest 1 is placed horizontally at the front end of the lower seat cushion A2, there is a gap between the rear end of the backrest 1 and the front end of the lower seat cushion A2. Figure 2 In this embodiment, a shielding member 7 extending downward is provided at the lower end of the back side of the backrest 1, and the shielding member 7 is arranged along the width direction of the backrest 1. Figure 3 When the backrest 1 is tilted forward and flattened on the front end of the seat cushion assembly, the shielding component 7 can cover the gap between the rear end of the backrest 1 and the front end of the lower seat cushion A2, thereby improving the overall aesthetics of the seat.

[0049] Furthermore, the shielding component 7 is a flexible covering component, the upper end of which is connected to the lower end of the backrest 1. With such a design, when the backrest 1 moves, the shielding component 7 will not interfere with other components, thereby ensuring the smoothness of the backrest 1 during rotation.

[0050] In this embodiment, a tilt adjustment mechanism is provided between the lower seat cushion A2 and the base A1, and the tilt adjustment mechanism can drive the lower seat cushion A2 to move relative to the base A1 to adjust the tilt angle of the lower seat cushion A2. Considering this, in the sitting state, the tilt adjustment of the seat cushion assembly in a small range can be achieved to meet the user's comfort requirements in the sitting state. After the backrest 1 rotates to the front end of the seat cushion assembly, the tilt angle of the lower seat cushion A2 can be adjusted through the tilt adjustment mechanism so that the upper side of the lower seat cushion A2 is flush with the upper side of the backrest 1, thereby ensuring the flatness of the surface after the backrest 1 is connected to the lower seat cushion A2. Adjusting the tilt angle of the seat cushion is a prior art and will not be repeated here.

[0051] Please refer to Figure 7 and 8 The lower seat cushion A2 is fixed with a support plate A5, which is made of elastic material. With this design, after the upper seat cushion A3 is flipped backward, the support plate A5 can ensure the flatness and comfort of the surface of the lower seat cushion A2. In addition, when the seat is in a sitting position, the upper seat cushion A3 overlaps the lower seat cushion A2, and the support plate A5 can provide elastic support, further improving the riding comfort of the user.

[0052] Based on the above structural design, the car seat provided in this embodiment also has a one-button bed-forming function, and its working principle is as follows: the first drive mechanism 3 drives the lower end of the swing arm 2 to rotate forward around the base A1, driving the backrest 1 at the upper end of the swing arm 2 to tilt forward to the front end of the seat cushion assembly, and then the flip drive mechanism 4 drives the upper seat cushion A3 to flip backward to a horizontal state relative to the lower seat cushion A2, thereby realizing the independent transformation of the car seat into a bed. By realizing the independent bed-forming function of the car seat, the operation steps can be reduced, the intelligence of the whole vehicle can be improved, and it has the technical advantages of good spatial adaptability and good overall appearance.

[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 various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A car seat capable of independently transforming into a bed, comprising a base (A1), a seat cushion assembly being arranged on the base (A1), a backrest (1) being arranged at the rear end of the seat cushion assembly, characterized in that: The side of the backrest (1) is provided with a swing arm (2) extending toward the base (A1); the lower end of the swing arm (2) is rotatably connected to the base (A1); the swing arm (2) rotates forward relative to the base (A1) so that the backrest (1) can be tilted forward and connected to the front end of the seat cushion assembly; the seat cushion assembly comprises an upper seat cushion (A3) and a lower seat cushion (A2) which are arranged in an overlapping manner; the upper seat cushion (A3) can be flipped backward to a horizontal state relative to the lower seat cushion (A2).

2. The car seat capable of independently transforming into a bed according to claim 1, characterized in that: The base (A1) is provided with a first driving mechanism (3) for driving the lower end of the swing arm (2) to rotate.

3. The car seat capable of independently transforming into a bed according to claim 1 or 2, characterized in that: A flipping driving mechanism (4) is provided between the upper seat cushion (A3) and the lower seat cushion (A2), and is used for driving the upper seat cushion (A3) to flip backward relative to the lower seat cushion (A2).

4. The car seat capable of independently transforming into a bed according to claim 3, characterized in that: The flipping drive mechanism (4) comprises a drive assembly, a first gear (41) fixedly mounted on the rear end of the lower seat cushion (A2), a second gear (42) rotatably mounted on the rear end of the upper seat cushion (A3), and a retaining frame (A4); the drive assembly is used to drive the second gear (42) to rotate around the circumference of the first gear (41); The two ends of the retaining frame (A4) are respectively rotatably sleeved on the axial centers of the first gear (41) and the second gear (42), so that the second gear (42) and the first gear (41) can maintain a continuous meshing state.

5. The car seat capable of independently transforming into a bed according to claim 4, characterized in that: The driving assembly comprises a third gear (43) rotatably mounted on the rear end of the lower seat cushion (A2) and a first driver (44) driving the third gear (43) to rotate; the third gear (43) is coaxially arranged with the first gear (41), and the third gear (43) is meshed with the second gear (42).

6. The car seat capable of independently transforming into a bed according to claim 5, characterized in that: The transmission ratio among the first gear (41), the second gear (42) and the third gear (43) is 1:1:

1.

7. The car seat capable of independently transforming into a bed according to claim 1, characterized in that: The side portion of the backrest (1) is rotatably connected to the upper end of the swing arm (2), and an electric angle adjuster (9) is provided between the side portion of the backrest (1) and the upper end of the swing arm (2).

8. The car seat capable of independently transforming into a bed according to claim 1, characterized in that: The lower end of the swing arm (2) is rotatably arranged in the middle of the length direction of the base (A1).

9. The car seat capable of independently transforming into a bed according to claim 1, characterized in that: A headrest (5) capable of being folded forward is mounted on the upper end of the backrest (1), and a second driving mechanism (6) is provided on the backrest (1) for driving the headrest (5) to rotate forward and backward relative to the upper end of the backrest (1).

10. The car seat capable of independently transforming into a bed according to claim 1, characterized in that: A shielding component (7) extending downward is provided at the lower back side of the backrest (1); when the backrest (1) is tilted forward and flattened at the front end of the seat cushion assembly, the shielding component (7) can cover the gap between the backrest (1) and the seat cushion assembly.

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