Transformable seat

Abstract

The invention discloses a transformable seat which comprises a base, a cushion assembly arranged on the base and a backrest assembly arranged at the rear end of the cushion assembly, the front end of the cushion assembly is rotationally connected with the base, the backrest assembly is provided with a front backrest and a rear backrest which are arranged in an overlapped mode, and the lower portion of the front backrest is connected to the base in a front-back overturning mode through a transmission mechanism. The rear backrest can be overturned backwards to a horizontal state relative to the front backrest; the seat can be changed into a lying state from a sitting posture state, in the lying state, the cushion assembly is overturned forwards relative to the base to be in a horizontal state, the front backrest is overturned forwards under the driving action of the transmission mechanism to be flush with the rear end of the cushion assembly in a butt joint mode, and the rear backrest is overturned backwards to be in the horizontal state. The bed has the advantages that the bed can be independently transformed into a bed, and operation is convenient and fast.

Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, and in particular to a deformable seat. Background Art

[0002] At present, due to the increasing demand for long-distance travel and camping, many large SUVs have launched large bed models to allow users to lie down and rest during their travels.

[0003] However, in the existing automotive field, the lying rest function is usually achieved in the following ways: 1. Remove the headrests of the first row seats, fold the backrests backwards, and splice the backrests with the second row seats to form a bed; 2. Fold the backrests of the third row seats forward, and then rotate them together with the second row seats to form a bed; 3. Fold the backrests of the second and third rows of seats and combine them with the trunk floor to form a bed. The above methods all require at least two rows of seats to be combined or combined with the trunk floor at the same time to form a bed, which is inconvenient for users to operate, and has defects such as cumbersome steps and poor space adaptability. Summary of the invention

[0004] In view of this, the present invention provides a transformable seat that can be independently transformed into a bed and has the advantage of being easy and quick to operate.

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

[0006] A deformable seat comprises a base, a seat cushion assembly arranged on the base, and a backrest assembly arranged at the rear end of the seat cushion assembly, wherein the front end of the seat cushion assembly is rotatably connected to the base, the backrest assembly comprises a front backrest and a rear backrest arranged in an overlapping manner, the lower part of the front backrest is connected to the base through a transmission mechanism so as to be flippable forward and backward, and the rear backrest can be flipped backward to a horizontal state relative to the front backrest;

[0007] The seat can be transformed from a sitting state to a lying state. In the lying state, the seat cushion assembly flips forward to a horizontal state relative to the base, the front backrest flips forward to be flush with the rear end of the seat cushion assembly under the driving action of the transmission mechanism, and the rear backrest flips backward to a horizontal state.

[0008] With the above structure, in the sitting state, the front backrest and the rear backrest are arranged overlappingly. When the seat needs to be transformed into a bed, the front end of the seat cushion assembly is flipped forward 180 degrees around the base so that the bottom of the seat cushion assembly faces upward. Thereafter, under the driving action of the transmission mechanism, the overlapping front backrest and rear backrest are flipped forward as a whole, and the upper end of the front backrest is flush with the rear end of the flipped seat cushion assembly. Then the rear backrest is flipped backward relative to the front backrest to a horizontal state. At this time, the seat cushion assembly, the front backrest and the rear backrest are connected to form a bed.

[0009] Preferably, a front link and a rear link are provided between the seat cushion assembly and the base, the upper and lower ends of the front link are rotatably connected to the front end of the seat cushion assembly and the base respectively, and the upper and lower ends of the rear link are rotatably connected to the rear end of the seat cushion assembly and the base respectively, and the seat cushion assembly is provided with a locking assembly at a position corresponding to the rotational connection of the rear link, and the locking assembly is used to switch the seat cushion assembly between maintaining a rotational connection with the rear link and releasing the connection; a locking assembly is provided between the front link and the base, and the locking assembly is used to switch the front link between maintaining a rotational connection with the base and a fixed connection;

[0010] A driver is arranged between the seat cushion assembly and the front connecting rod, and the driver is used for driving the seat cushion assembly to rotate relative to the front connecting rod.

[0011] Preferably, a retaining mechanism is provided on the base, and when the upper end of the rear connecting rod is disconnected from the seat cushion assembly, the retaining mechanism can keep the rear connecting rod locked relative to the base.

[0012] Preferably: the retaining mechanism includes a first gear and a second gear rotatably mounted on the base, the lower end of the front connecting rod is provided with a first arc-shaped tooth portion meshing with the first gear, the lower end of the rear connecting rod is provided with a second arc-shaped tooth portion meshing with the second gear, the lower end of the first gear has a first extension portion extending downward, the lower end of the second gear has a second extension portion extending downward, a synchronization rod is provided between the lower parts of the first extension portion and the second extension portion, and both ends of the synchronization rod are rotatably connected to the lower part of the first extension portion and the lower part of the second extension portion respectively.

[0013] Preferably, the locking assembly includes a locking bracket fixed on the base, a locking rod located above the locking bracket, and a zipper connected between the locking bracket and the locking rod; the lower end of the front connecting rod is rotatably connected to the locking bracket, the middle part of the locking rod is hinged to the front connecting rod, one end of the locking bracket is provided with a notch, one end of the locking rod has a clamping portion adapted to the notch, and the zipper is used to clamp the clamping portion in the notch, or to move the clamping portion upward away from the notch.

[0014] Preferably, the front connecting rods and the rear connecting rods are each provided with two groups, the two groups of the front connecting rods are respectively arranged at both sides of the front end of the seat cushion assembly, and the two groups of the rear connecting rods are respectively arranged at both sides of the rear end of the seat cushion assembly.

[0015] Preferably, the transmission mechanism comprises a first connecting rod and a second connecting rod arranged on the side of the front backrest, the upper end of the first connecting rod is rotatably connected to the lower part of the front backrest, and the lower end is hinged to the base, the upper end of the second connecting rod is hinged to the lower end of the front backrest, and the lower end is hinged to the base, and an angle adjustment mechanism is provided between the front backrest and the upper end of the first connecting rod, which is used to drive the front backrest to rotate forward and backward around the upper end of the first connecting rod.

[0016] Preferably, the first connecting rod and the second connecting rod are arranged from front to back, and in the height direction of the front backrest side portion, the rotation center of the upper end of the first connecting rod is located above the rotation center of the upper end of the second connecting rod.

[0017] Preferably, a flipping drive mechanism is provided between the front backrest and the rear backrest, for driving the rear backrest to flip backward relative to the front backrest.

[0018] Preferably, a headrest that can be folded forward is installed on the upper end of the front backrest, and a driving mechanism is provided on the front backrest for driving the headrest to rotate forward and backward relative to the upper end of the front backrest.

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

[0020] 1. When the deformable seat provided by the present invention is used, when the seat is transformed from a sitting state to a lying state, the front end of the seat cushion assembly flips forward 180 degrees around the base so that the bottom of the seat cushion assembly faces upward. Thereafter, under the driving action of the transmission mechanism, the overlapping front backrest and rear backrest flip forward as a whole, and the upper end of the front backrest is connected and flush with the rear end of the flipped seat cushion assembly. Then, the rear backrest is flipped backward relative to the front backrest to a horizontal state. At this time, the seat cushion assembly, the front backrest and the rear backrest are connected to form a bed, which has the advantages of convenient operation, large area and high flatness after the bed is formed, thereby improving the intelligence of the entire vehicle.

[0021] 2. The deformable seat provided by the present invention is adopted, and a front connecting rod, a rear connecting rod, a locking assembly and a locking assembly are arranged, and the front connecting rod, the base, the rear connecting rod and the seat cushion assembly form a deformable four-bar mechanism. Such a structural design can realize the stable support and forward movement function of the seat cushion assembly when the seat is in a sitting state, and at the same time can ensure the stability and feasibility of the seat cushion assembly flipping forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the deformed seat in a sitting position;

[0023] Figure 2 This is a schematic diagram of the structure after the seat is transformed into a bed;

[0024] Figure 3 A schematic diagram showing the structure of the driving mechanism E for flipping the backrest assembly 3 forward and flat;

[0025] Figure 4 It is a right side view of the deformed seat in a sitting position;

[0026] Figure 5 is a cross-sectional view of the deformed seat in a sitting position;

[0027] Figure 6 This is a right side view of the seat after it is transformed into a bed;

[0028] Figure 7 A structural diagram showing the connection relationship between the seat cushion assembly 2 and the base 1 (the synchronization rod F3 is hidden);

[0029] Figure 8 It is a partial enlarged view of the lock component C;

[0030] Fig. 9 It is a schematic diagram of the structure of the deformed seat in a sitting position after the upper cover is applied;

[0031] Fig.10 It is a schematic diagram of the structure of the bed after the deformed seat cover is covered with the upper cover. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with embodiments and drawings.

[0033] like Figure 1 As shown, a deformable seat comprises a base 1, a seat cushion assembly 2 arranged on the base 1, and a backrest assembly 3 arranged at the rear end of the seat cushion assembly 2, wherein the front end of the seat cushion assembly 2 is rotatably connected to the base 1. Figure 4 It can be seen that the backrest assembly 3 has a front backrest 31 and a rear backrest 32 arranged in an overlapping manner. The lower part of the front backrest 31 is connected to the base 1 through a transmission mechanism A so that it can be flipped forward and backward, and the rear backrest 32 can be flipped backward to a horizontal state relative to the front backrest 31. The seat can be transformed from a sitting state to a lying state. In the sitting state, the seat cushion assembly 2 is supported on the base 1 at a nearly parallel angle, and the backrest assembly 3 is tilted and supported at the rear end of the seat cushion assembly 2; refer to Figure 2 In the lying flat state, the seat cushion assembly 2 flips forward to a horizontal state relative to the base 1, the front backrest 31 flips forward to be flush with the rear end of the seat cushion assembly 2 under the driving action of the transmission mechanism A, and the rear backrest 32 flips backward to a horizontal state relative to the front backrest 31. At this point, the seat cushion assembly 2, the front backrest 31 and the rear backrest 32 are connected to form a bed.

[0034] Based on the above structural design, reference Fig. 9 and 10, when the deformed seat is in the sitting position, the front backrest 31 and the rear backrest 32 are arranged in an overlapping manner. When the user needs to lie flat for a rest, the front end of the cushion assembly 2 is turned forward 180 degrees around the base 1 so that the bottom of the cushion assembly 2 faces upward. Thereafter, under the driving action of the transmission mechanism A, the overlapping front backrest 31 and the rear backrest 32 are turned forward as a whole, and the upper end of the front backrest 31 is connected and flush with the rear end of the turned cushion assembly 2. Then the rear backrest 32 is turned backward relative to the front backrest 31 to a horizontal state. At this time, the cushion assembly 2, the front backrest 31 and the rear backrest 32 are connected to form a bed. By manually or electrically turning the cushion assembly 2, the front backrest 31 and the rear backrest 32, the function of the seat independently forming a bed can be realized, which has the advantages of convenient operation and high flatness after forming a bed, and improves the intelligence of the whole vehicle. At the same time, the backrest adopts a double-layer structure design. By unfolding the rear backrest 32 backward to a horizontal state, the support area of ​​the bed can be expanded, ensuring sufficient support length, so as to adapt to users of different body shapes.

[0035] A structure for electrically controlling the seat to transform into a bed is described in detail below.

[0036] Please refer to Figure 1 and 4 A front link B1 and a rear link B2 are provided between the seat cushion assembly 2 and the base 1, wherein the upper and lower ends of the front link B1 are respectively rotatably connected to the front end of the seat cushion assembly 2 and the base 1, and the upper and lower ends of the rear link B2 are respectively rotatably connected to the rear end of the seat cushion assembly 2 and the base 1. The seat cushion assembly 2 is provided with a lock assembly C at a position corresponding to the rotational connection of the rear link B2, and the lock assembly C can switch the seat cushion assembly 2 between maintaining a rotational connection with the rear link B2 and releasing the connection. A locking assembly D is provided between the front link B1 and the base 1, and the locking assembly D can switch the front link B1 between maintaining a rotational connection with the base 1 and a fixed connection. A driver 4 is provided between the seat cushion assembly 2 and the front link B1, and the driver 4 is used to drive the seat cushion assembly 2 to rotate relative to the front link B1. In this embodiment, the driver 4 is an electric recliner, and the electric recliner can be controlled by a motor to drive the seat cushion assembly 2 to rotate relative to the front link B1.

[0037] Based on this, when the seat is in the sitting position, the lock assembly C keeps the rear end of the cushion assembly 2 in rotational connection with the upper end of the rear link B2, and the lock assembly D keeps the lower end of the front link B1 in rotational connection with the base 1. At this time, under the self-locking action of the driver 4, the front link B1, the base 1, the rear link B2 and the cushion assembly 2 form a stable four-bar linkage, and the cushion assembly 2 can be stably supported on the base 1. In addition, the cushion assembly 2 also has an independent forward movement function. In the sitting position, the driver 4 drives the cushion assembly 2 to rotate relative to the front link B1, which can drive the four-bar linkage to move, thereby realizing the forward movement adjustment of the cushion assembly 2, freeing up space under the backrest assembly 3 to facilitate the backrest angle adjustment and improve the user's riding comfort. When the seat needs to be transformed into a bed, the locking assembly C releases the connection between the cushion assembly 2 and the rear connecting rod B2. Under the driving action of the driver 4, the rear end of the cushion assembly 2 can be moved upward away from the upper end of the rear connecting rod B2, so that the cushion assembly 2 can be flipped forward around the front connecting rod B1. At the same time, the locking assembly D fixes the lower end of the front connecting rod B1 with the base 1, ensuring that the front connecting rod B1 is in a stable supporting state, thereby providing strong support for the flipping of the cushion assembly 2 and ensuring the feasibility of forming a bed.

[0038] Further, refer to Figure 7 and 8 , a latch d is fixedly provided at the upper end of the rear link B2, and the latch d extends along the width direction of the cushion assembly 2. In this embodiment, the lock assembly C adopts a ground lock structure, which includes a base C3 fixedly provided at the rear end of the cushion assembly 2, on which a lock hook C1 and an unlocking component C2 for controlling the rotation of the lock hook C1 are rotatably provided. In the locked state, the lock hook C1 is buckled with the latch d so that the latch d is kept in rotational connection with the rear end of the cushion assembly 2; when unlocking, the unlocking component C2 pulls the lock hook C1 to rotate, and the lock hook C1 releases the latch d, so that the rear end of the cushion assembly 2 can move upward away from the latch d. In the field of automobile seat technology, ground locks are mature technologies and will not be described in detail here.

[0039] like Figure 4 As shown, a retaining mechanism F is provided on the base 1. When the upper end of the rear link B2 is disconnected from the seat cushion assembly 2, the retaining mechanism F can keep the rear link B2 locked relative to the base 1. With such a design, after the lock assembly C is unlocked, when the rear end of the seat cushion assembly 2 is away from the rear link B2 and flips forward, the rear link B2 can be kept in the designed position under the action of the retaining mechanism F. When the seat is restored to the sitting position, the seat cushion assembly 2 flips from front to back, and the rear end of the seat cushion assembly 2 can return to the position connected with the lock assembly C, so as to ensure that the lock assembly C can accurately lock the latch d.

[0040] Further, combined with Figure 4 and Figure 7As shown, the holding mechanism F includes a first gear F1 and a second gear F2 which are rotatably mounted on the base 1 respectively, a first arc-shaped tooth portion a meshing with the first gear F1 is provided at the lower end of the front link B1, a second arc-shaped tooth portion b meshing with the second gear F2 is provided at the lower end of the rear link B2, the first gear F1 has a first extension portion F11 extending downward at the lower end, the second gear F2 has a second extension portion F21 extending downward at the lower end, a synchronization rod F3 is provided between the lower parts of the first extension portion F11 and the second extension portion F21, and both ends of the synchronization rod F3 are rotatably connected to the lower parts of the first extension portion F11 and the second extension portion F21 respectively. With such a design, when the seat is transformed into a bed, the locking assembly D makes the lower end of the front link B1 fixedly connected to the base 1, that is, the first arc-shaped tooth portion a at the lower end of the front link B1 is fixedly engaged with the first gear F1, and under the synchronous action of the synchronization rod F3, the second arc-shaped tooth portion b at the lower end of the rear link B2 is also fixedly engaged with the second gear F2, so that the rear link B2 can be locked relative to the base 1. On the other hand, when the seat is in a sitting position, the locking assembly D makes the lower end of the front link B1 rotatably connected to the base 1, and the driver 4 drives the seat cushion assembly 2 to rotate around the front link B1, which can drive the lower end of the front link B1 to rotate. The rotation of the lower end of the front link B1 can drive the first gear F1 to rotate around the base 1, and under the synchronous transmission action of the synchronization rod F3, the second gear F2 and the lower end of the rear link B2 are driven to rotate in turn, thereby realizing the forward movement function of the seat cushion assembly 2.

[0041] In the above structural design, the functions of the retaining mechanism F are: 1. After the lock component C is unlocked, the seat cushion assembly 2 flips forward. Under the action of the retaining mechanism F, the rear link B2 can be kept stationary, ensuring that when the seat cushion assembly 2 flips backward to a horizontal state again, the lock component C can be accurately buckled on the latch d. 2. In the sitting mode, when the driver 4 drives the seat cushion assembly 2 to move forward, the retaining mechanism F adopts the above transmission structure, and will not affect the four-link structure composed of the front link B1, the base 1, the rear link B2 and the seat cushion assembly 2, thereby ensuring that the seat cushion assembly 2 can achieve the front and rear adjustment function. 3. Through the meshing self-locking effect between the gears, in the locked state, the stability of the fixed support of the front link B1 and the rear link B2 can be improved; in the unlocked state, through gear transmission, it has the technical advantages of high transmission efficiency and high movement accuracy.

[0042] like Figure 4 As shown, in this embodiment, a torsion spring 8 is provided between the lower end of the rear link B2 and the base 1. The torsion spring 8 can eliminate the gap between the lower end of the rear link B2 and the base 1, thereby improving the stability of the overall structure.

[0043] Reference Figure 5The locking assembly D includes a locking bracket D11, a locking rod D12 located above the locking bracket D11, and a zipper D13 connected between the locking bracket D11 and the locking rod D12, wherein the locking bracket D11 is fixedly assembled on the base 1, the lower end of the front connecting rod B1 is rotatably connected to the locking bracket D11, and the middle part of the locking rod D12 is hinged to the front connecting rod B1. A notch e is provided at one end of the locking bracket D11, and a clamping portion f extending downward is provided at one end of the locking rod D12, and the clamping portion f is adapted to the notch e. ​​When the locking assembly D is locked, the clamping portion f of the locking rod D12 is clamped downward on the notch e. ​​At this time, the locking bracket D11, the locking rod D12 and the front connecting rod B1 form a stable triangular frame, and the front connecting rod B1 can be fixedly supported on the base 1. When unlocking, the zipper D13 can be controlled by the controller to pull the lock rod D12 downward, and the clamping part f can move upward away from the notch e. ​​At this time, the lower end of the front connecting rod B1 can maintain a rotational connection with the base 1.

[0044] In this embodiment, the front link B1, the rear link B2, the latch d, the locking assembly C and the retaining mechanism F are each provided with two groups, and correspond one to one. The two groups of front links B1 are respectively located at the front ends of the two sides of the seat cushion assembly 2, and the two groups of rear links B2 are respectively located at the rear ends of the two sides of the seat cushion assembly 2. The locking assembly D is arranged on the inner side of one of the groups of front links B1.

[0045] Please refer to Figure 4 The transmission mechanism A includes a first link A1 and a second link A2 arranged on the side of the front backrest 31, wherein the upper end of the first link A1 is rotatably connected to the lower part of the front backrest 31, and the lower end is hinged to the base 1, the upper end of the second link A2 is hinged to the lower end of the front backrest 31, and the lower end of the second link A2 is hinged to the base 1, Figure 1 It can be seen that an angle adjustment mechanism 5 is provided between the front backrest 31 and the upper end of the first connecting rod A1, and the angle adjustment mechanism 5 can drive the front backrest 31 to rotate forward and backward around the upper end of the first connecting rod A1. In the sitting state, the angle adjustment mechanism 5 drives the front backrest 31 to rotate in a small range, so as to achieve the angle adjustment of the backrest. When the seat is turned into a bed, the angle adjustment mechanism 5 can drive the front backrest 31 to tilt forward around the upper end of the first connecting rod A1 (refer to Figure 6 ), at this time, the support of the two connecting rods can keep the front backrest 31 stably in a horizontal state.

[0046] Re-attend Figure 4 and 6In this embodiment, the first link A1 and the second link A2 are arranged from front to back. In the height direction of the side of the front backrest 31, the rotation center of the upper end of the first link A1 is located above the rotation center of the upper end of the second link A2. In order to avoid interference between the movement of the first link A1 and the second link A2, the upper part of the first link A1 is an arc-shaped structure. Considering this, the first link A1, the base 1, the second link A2 and the front backrest 31 form a four-bar linkage. When the angle adjustment mechanism 5 drives the front backrest 31 to flip forward around the upper end of the first link A1 and flatten, the upper end of the second link A2 can pull the lower end of the front backrest 31 to move backward. The basis for such a design is that the design length of the seat cushion is usually smaller than the length of the backrest. When the seat cushion assembly 2 is flipped forward, the length of the space between the rear end of the seat cushion assembly 2 and the front backrest 31 is smaller than the length of the front backrest 31. Therefore, during the flipping forward of the front backrest 31, the upper end of the second connecting rod A2 pulls the lower end of the front backrest 31 to move backward, which can ensure that the flipping of the front backrest 31 is not interfered with and the front backrest 31 can be docked at the rear end of the seat cushion assembly 2.

[0047] In this embodiment, two groups of the first connecting rods A1 and the second connecting rods A2 are provided in a one-to-one correspondence, and the two groups of the first connecting rods A1 are respectively located on both sides of the width direction of the front backrest 31 .

[0048] like Figure 2 As shown, a flipping drive mechanism E is provided between the front backrest 31 and the rear backrest 32, which can drive the rear backrest 32 to flip backward relative to the front backrest 31, so that when the seat is transformed into a bed, the rear backrest 32 can automatically flip backward to a horizontal state relative to the front backrest 31.

[0049] Furthermore, Figure 3 As shown, the flipping drive mechanism E includes a driving assembly, a fixed gear E1 fixedly mounted on the rear end of the front backrest 31, and a revolving gear E2 arranged on the rear end of the rear backrest 32. The rear end here is the azimuthal expression of the front backrest 31 and the rear backrest 32 in the forward-facing flat state. The revolving gear E2 is meshed with the fixed gear E1, and the driving assembly can drive the revolving gear E2 to rotate around the fixed gear E1 in the circumferential direction, so as to drive the rear backrest 32 to flip backward around the rear end of the front backrest 31 to a horizontal state, and the upper side of the flipped rear backrest 32 can be flush with the upper side of the front backrest 31, so as to ensure the flatness of the surface of the rear backrest 32 and the front backrest 31 after the rear backrest 32 is unfolded.

[0050] For details, please refer to Figure 3The driving assembly includes a driver E4 and a retaining frame E3 rotatably connected between the rear ends of the front backrest 31 and the rear backrest 32, wherein the two ends of the retaining frame E3 are rotatably sleeved on the axial positions of the revolving gear E2 and the fixed gear E1 respectively, and the driver E4 is used to drive the retaining frame E3 to rotate around the rotation center between it and the front backrest 31, thereby driving the revolving gear E2 to rotate circumferentially around the fixed gear E1, thereby enabling the rear backrest 32 to flip backward to a horizontal state relative to the front backrest 31.

[0051] In this embodiment, there are two sets of fixed gears E1, revolving gears E2 and retaining frames E3, which correspond one to one. In the sitting state, the two sets of fixed gears E1 are respectively fixed on both sides of the lower end of the front backrest 31, and the two sets of revolving gears E2 are respectively rotatably set on both sides of the lower end of the rear backrest 32.

[0052] Please refer to Figure 4 and 6 A headrest 6 that can be folded forward is installed on the upper end of the front backrest 31. A driving mechanism H is provided on the front backrest 31, and the driving mechanism H can drive the headrest 6 to rotate forward and backward relative to the upper end of the front backrest 31. During the seat transformation into a bed, the driving mechanism H drives the headrest 6 to fold forward 90 degrees, which can prevent the front backrest 31 from interfering with the seat cushion assembly 2 during the forward flipping process. At the same time, after the front backrest 31 is flattened forward, the headrest 6 can contact the bottom plate in the vehicle, providing strong support for the front end of the front backrest 31, further improving the reliability and stability of the seat bed structure.

[0053] Combination Fig. 9 and 10 As shown, a shielding plate 7 is rotatably provided on the upper back side of the front backrest 31. When the front backrest 31 is tilted forward and connected with the seat cushion assembly 2, the shielding plate 7 can be rotated forward to cover the gap between the seat cushion assembly 2 and the front backrest 31, ensuring that the appearance of the bed surface is simple and flat, thereby improving the overall aesthetics of the seat.

[0054] 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 deformable seat, comprising a base (1), a seat cushion assembly (2) disposed on the base (1), and a backrest assembly (3) arranged at the rear end of the seat cushion assembly (2), characterized in that: The front end of the seat cushion assembly (2) is rotatably connected to the base (1); the backrest assembly (3) comprises a front backrest (31) and a rear backrest (32) which are arranged in an overlapping manner; the lower part of the front backrest (31) is connected to the base (1) via a transmission mechanism (A) so as to be flippable forward and backward; and the rear backrest (32) can be flipped backward to a horizontal state relative to the front backrest (31); The seat can be transformed from a sitting position to a lying position. In the lying position, the seat cushion assembly (2) flips forward to a horizontal position relative to the base (1), the front backrest (31) flips forward to be flush with the rear end of the seat cushion assembly (2) under the driving action of the transmission mechanism (A), and the rear backrest (32) flips backward to a horizontal position.

2. The deformable seat according to claim 1, characterized in that: A front connecting rod (B1) and a rear connecting rod (B2) are provided between the seat cushion assembly (2) and the base (1); the upper and lower ends of the front connecting rod (B1) are respectively rotatably connected to the front end of the seat cushion assembly (2) and the base (1); the upper and lower ends of the rear connecting rod (B2) are respectively rotatably connected to the rear end of the seat cushion assembly (2) and the base (1); the seat cushion assembly (2) is provided with a locking assembly (C) at a position corresponding to the rotatable connection of the rear connecting rod (B2); the locking assembly (C) is used to switch the seat cushion assembly (2) between maintaining a rotatable connection with the rear connecting rod (B2) and releasing the connection; a locking assembly (D) is provided between the front connecting rod (B1) and the base (1); the locking assembly (D) is used to switch the front connecting rod (B1) between maintaining a rotatable connection with the base (1) and a fixed connection; A driver (4) is provided between the seat cushion assembly (2) and the front connecting rod (B1), and the driver (4) is used to drive the seat cushion assembly (2) to rotate relative to the front connecting rod (B1).

3. The deformable seat according to claim 2, characterized in that: The base (1) is provided with a retaining mechanism (F), and when the upper end of the rear connecting rod (B2) is disconnected from the seat cushion assembly (2), the retaining mechanism (F) can keep the rear connecting rod (B2) locked relative to the base (1).

4. The deformable seat according to claim 3, characterized in that: The holding mechanism (F) comprises a first gear (F1) and a second gear (F2) rotatably mounted on the base (1); a first arc-shaped tooth portion (a) meshing with the first gear (F1) is provided at the lower end of the front link (B1); a second arc-shaped tooth portion (b) meshing with the second gear (F2) is provided at the lower end of the rear link (B2); the first gear (F1) has a first extension portion (F11) extending downward at the lower end; the second gear (F2) has a second extension portion (F21) extending downward at the lower end; a synchronization rod (F3) is provided between the lower parts of the first extension portion (F11) and the second extension portion (F21); and two ends of the synchronization rod (F3) are rotatably connected to the lower parts of the first extension portion (F11) and the second extension portion (F21), respectively.

5. The deformable seat according to claim 2, characterized in that: The locking assembly (D) comprises a locking bracket (D11) fixed on the base (1), a locking rod (D12) located above the locking bracket (D11), and a zipper (D13) connected between the locking bracket (D11) and the locking rod (D12); the lower end of the front connecting rod (B1) is rotatably connected to the locking bracket (D11); the middle part of the locking rod (D12) is hinged to the front connecting rod (B1); one end of the locking bracket (D11) is provided with a notch (e); one end of the locking rod (D12) has a clamping portion (f) adapted to the notch (e); the zipper (D13) is used to clamp the clamping portion (f) in the notch (e), or to move the clamping portion (f) upward away from the notch (e).

6. The deformable seat according to claim 2, characterized in that: The front connecting rods (B1) and the rear connecting rods (B2) are each provided with two groups, the two groups of the front connecting rods (B1) are respectively arranged on both sides of the front end of the seat cushion assembly (2), and the two groups of the rear connecting rods (B2) are respectively arranged on both sides of the rear end of the seat cushion assembly (2).

7. The deformable seat according to claim 1, characterized in that: The transmission mechanism (A) comprises a first connecting rod (A1) and a second connecting rod (A2) arranged on the side of the front backrest (31); the upper end of the first connecting rod (A1) is rotatably connected to the lower part of the front backrest (31), and the lower end is hinged to the base (1); the upper end of the second connecting rod (A2) is hinged to the lower end of the front backrest (31), and the lower end is hinged to the base (1); an angle adjustment mechanism (5) is provided between the front backrest (31) and the upper end of the first connecting rod (A1), which is used to drive the front backrest (31) to rotate forward and backward around the upper end of the first connecting rod (A1).

8. The deformable seat according to claim 7, characterized in that: The first connecting rod (A1) and the second connecting rod (A2) are arranged from front to back. In the height direction of the side of the front backrest (31), the rotation center of the upper end of the first connecting rod (A1) is located above the rotation center of the upper end of the second connecting rod (A2).

9. The deformable seat according to claim 1, characterized in that: A flipping drive mechanism (E) is provided between the front backrest (31) and the rear backrest (32), and is used to drive the rear backrest (32) to flip backward relative to the front backrest (31).

10. The deformable seat according to claim 1, characterized in that: A headrest (6) that can be folded forward is installed on the upper end of the front backrest (31), and a driving mechanism (H) is provided on the front backrest (31) for driving the headrest (6) to rotate forward and backward relative to the upper end of the front backrest (31).

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