Vehicle seat

Abstract

A vehicle seat, comprising: a seat frame assembly (22) and a seat pan assembly (21) arranged on the upper part of the seat frame assembly (22); a front link assembly (23) rotatably connected to the front part of the seat pan assembly (21) and further rotatably connected to the front part of the seat frame assembly (22); a rear link assembly (24) rotatably connected to the rear part of the seat pan assembly (21) and further rotatably connected to the middle part of the seat frame assembly (22); and a rear drive mechanism (25) rotatably mounted on the seat frame assembly (22), wherein the rear drive mechanism (25) is drivingly connected to the rear link assembly (24), so as to drive the front link assembly (23) to rotate around a front rotation axis, thereby lifting the rear part of the seat pan assembly (21) upwards relative to the front part of the seat pan assembly (21).

Description

Car seats

[0001] This invention is based on CN application number 202520442383.1, filed on March 13, 2025, and claims priority to it. The disclosure of that CN application is incorporated herein by reference in its entirety. Technical Field

[0002] This invention relates to the field of vehicle technology, and specifically to a car seat. Background Technology

[0003] In its design, car seats are tilted to provide thigh support. This results in a height difference between the lower backrest and the rear of the seat cushion when the seat back is folded down, leaving the occupant's lower back unsupported and affecting comfort. To address this issue, a prior Chinese patent (application number 202221006711.6, invention title: Lumbar Support Device for Vehicle Seats) discloses a lumbar support device for vehicle seats. This device includes a lumbar support structure, a transmission support assembly, and a power assembly. The transmission support assembly is pivotally connected to the seat cushion module. The lumbar support structure is connected to the rotating side of the transmission support assembly. The power assembly is mounted on the seat cushion module and is configured to drive the transmission support assembly to rotate between a supported position and a folded position. The transmission support assembly is configured to lift the side of the lumbar support structure away from the seat cushion module upwards by rotating to the supported position, filling the gap between the backrest module and the seat cushion module. The lumbar support structure in this technical solution is raised at the rear end, and the front end of the lumbar support structure is at a certain angle to the seat cushion module. This causes the foam of the seat cushion cover to be squeezed and wrinkled, thus affecting the appearance of the seat. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of the prior art and provide a car seat that solves the problem that when the rear end of the existing lumbar support structure is raised, the foam of the seat cushion is squeezed and wrinkles are formed, thus affecting the appearance of the seat.

[0005] The technical solution to achieve the above objectives is:

[0006] This invention provides a car seat, including a seat frame assembly and a seat basin assembly disposed on the upper part of the seat frame assembly, the car seat further comprising:

[0007] A front linkage assembly, one end of which is rotatably connected to the front of the seat assembly, and the other end of which is rotatably connected to the seat frame assembly;

[0008] A rear linkage assembly, one end of which is rotatably connected to the rear of the seat assembly about a rear rotation axis, and the other end of which is rotatably connected to the seat frame assembly;

[0009] A rear drive mechanism, connected to the seat frame assembly and the rear linkage assembly, is used to drive the rear linkage assembly to rotate upward relative to the seat frame assembly, thereby causing the front linkage assembly to rotate about the front rotation axis, so as to lift the rear part of the seat assembly relative to the front part of the seat assembly.

[0010] Furthermore, the rear linkage assembly includes rear linkages disposed on both sides of the rear portion of the seat assembly, the rear linkages being rotatably connected to the rear portion of the seat assembly and the seat frame assembly, respectively.

[0011] Furthermore, the rear linkage assembly also includes a rear connecting rod fixedly connected between the two rear linkages, the rear connecting rod being rotatably connected to the seat assembly to form the rear rotation axis; or the rear connecting rod is configured to be rotatably connected to the rear linkage to form the rear rotation axis, while being fixedly connected to the seat assembly.

[0012] Furthermore, the rear linkage assembly also includes a rear seat connector rotatably mounted on the rear connecting rod, the rear seat connector being fixedly connected to the rear part of the seat assembly.

[0013] Furthermore, the rear drive mechanism includes a drive motor and a drive screw. One of the drive motor and the drive screw is connected to the seat frame assembly, and the other of the drive motor and the drive screw is connected to at least one rear connecting rod. The drive motor drives the drive screw to extend and retract relative to the drive motor, thereby driving the rear connecting rod to rotate upward relative to the seat frame assembly to lift the rear of the seat assembly upward.

[0014] Furthermore, the at least one rear link includes a first link portion and a second link portion, one end of the first link portion is rotatably connected to the seat assembly, the other end of the first link portion is fixedly connected to one end of the second link portion at an angle, and the other end of the second link portion is rotatably connected to the seat frame assembly or the drive screw.

[0015] Furthermore, the seat frame assembly includes a pair of seat frame side plates, a front cross tube of the seat frame supported and connected to the front of the pair of seat frame side plates, and a connecting rod bracket connected to the front cross tube of the seat frame, the connecting rod bracket being rotatably connected to the other end of the front connecting rod assembly.

[0016] Furthermore, the front linkage assembly includes front linkages disposed on both sides of the front part of the seat assembly, one end of the front linkage is rotatably connected to the front part of the seat assembly, and the other end of the front linkage is rotatably connected to the linkage bracket to form the front rotation axis.

[0017] The rear drive mechanism can drive the rear link assembly and thus cause the front link to rotate about the front rotation axis, thereby lifting the rear of the sitz bath assembly upward.

[0018] Furthermore, the front linkage assembly also includes a front connecting rod connected between the front linkages, the front connecting rod being fixedly connected to the front linkages and rotatably connected to the seat assembly.

[0019] Furthermore, the front linkage assembly also includes a front seat connector rotatably fitted onto the front connecting rod; the front seat connector is fixedly connected to the front of the seat assembly.

[0020] Furthermore, it also includes a front lifting linkage assembly, which includes a lifting linkage. One end of the lifting linkage is rotatably connected to the linkage bracket, and the other end of the lifting linkage is rotatably connected to the front linkage to form the front rotation axis. The rear drive mechanism can drive the rear linkage assembly and thus cause the front linkage to rotate about the front rotation axis, thereby realizing the upward lifting of the rear of the sitz bath assembly.

[0021] Furthermore, there are two lifting links, which are respectively disposed on opposite sides of the seat assembly. The front lifting link assembly also includes a lifting connecting rod fixedly connected between the two lifting links, and the lifting connecting rod is rotatably connected to the link bracket.

[0022] Furthermore, it also includes a front drive mechanism, which is connected to the seat frame assembly and the front lifting linkage assembly respectively to drive the front linkage assembly to rotate upward relative to the seat frame assembly, so that the front part of the seat assembly is lifted upward about the rear rotation axis.

[0023] The beneficial effects of the car seat of this invention are as follows:

[0024] The car seat of the present invention has a front linkage assembly and a rear linkage assembly connected between the seat cushion assembly and the seat frame assembly. The rear drive mechanism can drive the rear linkage assembly to rotate upward, lifting the rear part of the seat cushion assembly upward as a whole. This realizes the rear lifting function of the seat cushion on the car seat. After the backrest is folded down, it can reduce the height difference between the side of the backrest near the seat cushion and the rear end of the seat cushion, providing support for the occupant's waist and improving comfort. Moreover, during the rear lifting adjustment, the rear part of the seat cushion assembly is lifted relative to the front part as a whole, which can avoid the foam of the cover from being squeezed and causing wrinkles, thus improving the appearance quality.

[0025] The car seat of the present invention is further provided with a front lifting linkage assembly and a front drive mechanism, which can realize the lifting and adjustment function of the front of the seat assembly to meet the various adjustment requirements of the occupant. Attached Figure Description

[0026] Figure 1 is a three-dimensional structural schematic diagram of the seat cushion frame assembly of the automobile seat of the present invention.

[0027] Figure 2 is a schematic diagram of the explosive decomposition structure of the structure shown in Figure 1.

[0028] Figure 3 is a schematic diagram of the assembly relationship of the front link assembly, rear link assembly, front lift link assembly, and seat frame assembly of the automobile seat of the present invention.

[0029] Figure 4 is a schematic diagram of the connection between the front cross tube of the seat frame and the front lifting linkage assembly in the car seat of the present invention.

[0030] Figure 5 is an exploded structural diagram of the mechanisms used for the front lifting function and the rear lifting function in the structure shown in Figure 2.

[0031] Figure 6 is a side view of the car seat of the present invention with the backrest reclined and the seat cushion in the designed state.

[0032] Figure 7 is a side view of the car seat of the present invention with the backrest reclined and the seat cushion in a rear-raised state.

[0033] Figure 8 is a schematic diagram of the car seat cushion of the present invention in the design state.

[0034] Figure 9 is a schematic diagram of the car seat cushion of the present invention in the rear-lifted state.

[0035] Figure 10 is a side view of the car seat of the present invention with the backrest in a supported state and the seat cushion in a designed state.

[0036] Figure 11 is a side view of the car seat of the present invention with the backrest in a supported state and the seat cushion in a forward-lifted state.

[0037] Figure 12 is a schematic diagram of the design state of the car seat cushion of the present invention.

[0038] Figure 13 is a schematic diagram of the car seat cushion of the present invention in the forward-lifted state.

[0039] Figure 14 is a schematic diagram of the principle of adjusting the seat cushion of the car seat of the present invention from the design state to the rear-lifted state.

[0040] Figure 15 is a schematic diagram of the principle of adjusting the seat cushion of the car seat of the present invention from the design state to the forward-lifted state.

[0041] Figure 16 is a three-dimensional structural diagram of the seat cushion frame assembly of the automobile seat of the present invention in the forward-lifted state.

[0042] Figure 17 is a side view of the structure shown in Figure 16.

[0043] Figure 18 is a schematic diagram of the connection structure of the front link assembly, the rear link assembly, the front lifting link assembly, and the seat frame assembly when the seat cushion frame assembly of the automobile seat of the present invention is in the forward lifting state.

[0044] Figure 19 is a structural schematic diagram of the structure shown in Figure 16 without the seat assembly.

[0045] Figure 20 is a three-dimensional structural diagram of the seat cushion frame assembly of the automobile seat of the present invention in the design state.

[0046] Figure 21 is a side view of the structure shown in Figure 20.

[0047] Figure 22 is a schematic diagram of the connection structure of the front link assembly, rear link assembly, front lift link assembly and seat frame assembly of the car seat of the present invention when the seat cushion frame assembly is in the design state.

[0048] Figure 23 is a structural schematic diagram of the structure shown in Figure 20 without the sitz bath assembly.

[0049] Figure 24 is a three-dimensional structural diagram of the seat cushion frame assembly of the automobile seat of the present invention in the rear-lifted state.

[0050] Figure 25 is a side view of the structure shown in Figure 24.

[0051] Figure 26 is a schematic diagram of the connection structure of the front link assembly, the rear link assembly, the front lift link assembly, and the seat frame assembly when the seat cushion frame assembly of the automobile seat of the present invention is in the rear lift state.

[0052] Figure 27 is a structural schematic diagram of the structure shown in Figure 24 without the sitz bath assembly.

[0053] Figure 28 is a three-dimensional structural schematic diagram of another embodiment of the car seat cushion frame assembly of the present invention, omitting the seat basin assembly.

[0054] Figure 29 is a schematic diagram of the front cross tube of the seat frame assembly in the embodiment shown in Figure 28.

[0055] Figure 30 is a schematic diagram of the car seat in the embodiment shown in Figure 28 being adjusted from the design state to the rear-lifted state.

[0056] Figure 31 is a schematic diagram of an application scenario of the car seat of the present invention.

[0057] Figure 32 is a schematic diagram of another application scenario of the car seat of the present invention.

[0058] Figure 33 is a schematic diagram of the car seat of the present invention with the backrest reclined and the seat cushion in a rear-raised state to improve the comfort of the occupants while lying down.

[0059] Figure 34 is a schematic diagram of the existing technology in which a gap is formed between the lower end of the backrest and the rear end of the seat cushion when the backrest is folded down, thus affecting comfort.

[0060] Explanation of reference numerals in the attached diagram: Backrest - 11; Seat cushion - 12; Gap - 13; Seat cushion assembly - 20; Seat basin assembly - 21; Seat frame assembly - 22; Seat frame side plate - 221; Seat frame front cross tube - 222; Link bracket - 223; Front mounting bracket - 224; Rear mounting bracket - 225; Front link assembly - 23; Front connecting rod - 231; Front seat basin connector - 232; Front link - 233; Front hinge - 234; Rear link assembly - 24; Rear connecting rod - 241; Rear seat basin connector - 242; Rear link - 243; Rear hinge - 244; First link section - 2431; Second link section - 2432; Rear drive mechanism - 25; Mounting bolt - 251; Connecting bolt - 252; Front lifting linkage assembly - 26; lifting connecting rod - 261; lifting link - 262; connecting frame - 263; front drive mechanism - 27; connecting piece - 271. Detailed Implementation

[0061] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0062] Referring to Figure 1, this invention provides a car seat with a rearward-lifting function for the seat cushion. When the backrest is reclined, the seat cushion can be lifted so that the rear of the cushion is flush with the lower end of the backrest, providing lumbar support and improving occupant comfort. Furthermore, the seat pan assembly, front linkage assembly, and rear linkage assembly allow the rearward-lifting adjustment of the seat cushion to be achieved by rotating and lifting the rear of the seat pan assembly relative to the front, preventing wrinkles caused by foam compression of the seat cover and effectively improving the appearance of the car seat. The structure of the car seat of this invention will be described below with reference to the accompanying drawings.

[0063] Referring to Figure 1, a three-dimensional structural schematic diagram of the seat cushion frame assembly of the automobile seat of the present invention is shown. Referring to Figure 2, an exploded structural schematic diagram of the structure shown in Figure 1 is shown. The structure of the automobile seat of the present invention will be described below with reference to Figures 1 and 2.

[0064] As shown in Figures 1 and 2, the car seat of the present invention includes a seat frame assembly 22 and a seat basin assembly 21 disposed on the seat frame assembly 22.

[0065] The car seat also includes a front link assembly 23, a rear link assembly 24, and a rear drive mechanism 25.

[0066] One end of the front linkage assembly 23 is rotatably connected to the front of the seat assembly 21. The other end of the front linkage assembly 23 is also rotatably connected to the front of the seat frame assembly 22. The front linkage assembly 23 is located between the front of the seat assembly 21 and the front of the seat frame assembly 22.

[0067] One end of the rear linkage assembly 24 is rotatably connected to the rear of the seat assembly 21. The other end of the rear linkage assembly 24 is also rotatably connected to approximately the middle or rear-middle part of the seat frame assembly 22. The rear linkage assembly 24 is also located between the rear of the seat assembly 21 and the rear of the seat frame assembly 22.

[0068] The rear drive mechanism 25 is rotatably mounted on the seat frame assembly 22. The rear drive motor 25 is driven by the rear linkage assembly 24. The rear drive motor 25 can drive the rear linkage assembly 24 to rotate upward relative to the seat frame assembly 22, for example, by driving the front linkage assembly 23 about the front rotation axis through the forward drive of the seat assembly 21, thereby lifting the rear of the seat assembly 21 relative to the front of the seat assembly 21.

[0069] In this embodiment, when the rear drive mechanism drives the rear linkage assembly to rotate upward, the entire seat assembly is lifted upward. At the same time, the rear part of the seat assembly is lifted upward relative to the front part of the seat assembly, that is, the lifting range of the rear part of the seat assembly is greater than the lifting range of the front part of the seat assembly.

[0070] Thus, the seat cushion of the car seat of the present invention has a rear lift function, that is, the rear part of the seat basin assembly 21 can be lifted upward relative to the front part. The rear lift adjustment of the seat basin assembly 21 is a whole rotation adjustment of the seat basin assembly 21, which will not affect the appearance of the seat cushion surface. That is, the foam of the seat cushion cover will not be squeezed or wrinkled, thus ensuring the appearance quality of the car seat. The seat basin assembly can be flush with the lower end of the reclined backrest by rear lift, improving the comfort of the occupant when lying down.

[0071] In this embodiment, the sitz bath assembly can be spatially divided into a front section and a rear section. The front section is mainly used to support the upper thighs, while the rear section is mainly used to support the buttocks. The front and rear sections of the sitz bath assembly are one-piece sitz baths made of the same material. In some embodiments, the rear and front sections of the sitz bath assembly use different materials or structural forms. It is worth noting that in this embodiment, when the sitz bath assembly is lifted upwards, there is no relative rotation or deformation between the front and rear sections.

[0072] In one specific embodiment of the present invention, as shown in Figures 3 and 5, the rear connecting rod assembly 24 includes a rear connecting rod 241, a seat rear connector 242 sleeved on the rear connecting rod 241, and a rear connecting rod 243 connected to both ends of the rear connecting rod 241.

[0073] The rear seat connector 242 is fixedly connected to the rear of the seat assembly 21. The rear seat connector 242 is rotatable relative to the rear connecting rod 241. The rear connecting rod 243 is rotatably connected to approximately the middle or rear-middle part of the seat frame assembly 22. A rear drive mechanism 25 is drivenly connected to one of the rear connecting rods 243. The rear drive mechanism 25 drives the rear connecting rod 243 to rotate upwards about its rotatable connection point with the seat frame assembly 22 (i.e., the rear axis of rotation), thereby lifting the rear connecting rod 241 and the rear seat connector 242, along with the rear of the seat assembly 21, upwards.

[0074] Preferably, the rear drive mechanism 25 is telescopically adjustable. When extended rearward, the rear drive mechanism 25 pushes the connected rear link 243, causing the rear link 243 to rotate upward about its rotational connection with the seat frame assembly 22. The rear link 243 drives the rear connecting rod 241 to rotate upward, which in turn pushes the rear part of the seat assembly 21 upward, achieving an upward lifting effect. Conversely, the rear drive mechanism 25 can drive the rear part of the seat assembly 21 to rotate downward, returning it to its designed state. Preferably, the rear drive mechanism 25 has a self-locking function, which allows the seat assembly 21 to remain in the corresponding state, improving the stability of the seat assembly.

[0075] In a preferred embodiment, the rear drive mechanism 25 includes a drive motor and a drive screw, the drive motor being able to drive the drive screw to extend or retract relative to the drive motor, the drive screw being connected to a corresponding rear connecting rod 243.

[0076] In another preferred embodiment, the rear drive mechanism 25 may also be an electric cylinder, a push rod motor, or other telescopic and adjustable drive mechanism.

[0077] Furthermore, the rear drive mechanism 25 is driven to the lower part of the rear link 243, and the upper part of the rear link 243 is rotatably connected to approximately the middle of the seat frame assembly 22. Thus, under the driving action of the rear drive mechanism 25, the lower part of the rear link 243 can be adjusted upward and backward around the upper part.

[0078] Furthermore, the rear drive mechanism 25 is rotatably connected to the lower part of the rear connecting rod 243. Preferably, the front part of the rear drive mechanism 25 and the lower part of the rear connecting rod 243 are rotatably connected by a connecting bolt 252. Of course, the rotatable connection is not limited to a connecting bolt, but can also use other parts that can achieve a rotatable connection such as a pin or a rotating shaft.

[0079] Furthermore, there are two rear seat connectors 242, which are sleeved on the rear connecting rod 241. The rear seat connectors 242 are installed at the rear of the seat assembly 21 by fasteners such as mounting screws and bolts, and are fixedly connected to the bottom of the seat assembly 21.

[0080] Furthermore, referring to Figure 5, the rear connecting rod 243 includes a first connecting rod portion 2431 and a second connecting rod portion 2432. In this embodiment, one end of the first connecting rod portion 2431 (here, the rear portion) is rotatably connected to the seat assembly 21, and the other end of the first connecting rod portion 2431 (here, the front portion) is fixedly connected to one end of the second connecting rod portion 2432 (here, the lower portion) at an angle (that is, the first connecting rod portion 2431 and the second connecting rod portion 2432 can be separately constructed and fixed to each other, or they can be directly integrally formed), and the other end of the second connecting rod portion 2432 (here, the upper portion) is rotatably connected to the seat frame assembly 22 (in this case (as shown in Figure 5), the drive screw is rotatably connected to the connection point of the two connecting rod portions 2431 and 2432); or In some other embodiments, one end of the first link 2431 (here, the rear part) is rotatably connected to the seat assembly 21, and the other end of the first link 2431 (here, the front part) is fixedly connected to one end of the second link 2432 (here, the upper part) at an angle (that is, the first link 2431 and the second link 2432 can be separately constructed and fixed to each other, or they can be directly integrally formed), and the other end of the second link 2432 (here, the lower part) is rotatably connected to the drive screw (in this case (not shown), the connection between the two link parts 2431 and 2432 is rotatably connected to the seat frame assembly 22).

[0081] Preferably, the second link portion 2432 is arranged perpendicular to the first link portion 2431. The top or upper part of the second link portion 2432 (i.e., the other end of the second link portion) is rotatably connected to the seat frame assembly 22. For example, the rotatable connection between the second link portion and the seat frame assembly 22 can be achieved by a rear hinge 244, which can be a stepped bolt, a pin, or other parts that can achieve a rotatable connection.

[0082] In this embodiment, the rear connecting rod 243 is L-shaped. The drive screw is rotatably connected to the lower part of the second connecting rod portion 2432 (i.e., one end of the second connecting rod portion) and / or the front part of the first connecting rod portion 2431 (i.e., the other end of the first connecting rod portion).

[0083] In some other embodiments described above, the rear link 243 is shaped like a figure 7, meaning that the other end of the first link portion 2431 is connected to the upper part of the second link portion 2432 (i.e., one end of the second link portion), and is rotatably connected to the seat frame assembly 22 at the connection point. The drive screw is rotatably connected to the bottom or lower part of the second link portion (i.e., the other end of the second link portion).

[0084] In one specific embodiment of the present invention, as shown in Figures 3 and 5, the front connecting rod assembly 23 includes a front connecting rod 231, a seat front connector 232 sleeved on the front connecting rod 231, and a front connecting rod 233 connected to both ends of the front connecting rod 231; the seat front connector 232 is connected to and fixedly connected to the front part of the seat assembly 21, and the seat front connector 232 and the front connecting rod 231 are rotatable relative to each other; the front connecting rod 233 is rotatably connected to the front part of the seat frame assembly 22.

[0085] Furthermore, two front seat connectors 232 are provided, which are fitted onto the front connecting rod 231. These front seat connectors 232 are installed at the front of the seat assembly 21 using fasteners such as screws and bolts, and are fixedly connected to the bottom of the seat assembly 21. The front seat connectors 232 have grooves that fit the front connecting rod 231, allowing them to fit snugly onto the front connecting rod 231, and enabling the front connecting rod 231 to rotate relative to the front seat connectors 232.

[0086] Furthermore, one end of the front link 233 is fixedly connected to the corresponding end of the front connecting rod 231, and the other end of the front link 233 is rotatably connected to the front of the seat frame assembly 22.

[0087] Furthermore, as shown in Figure 5, the seat frame assembly 22 includes a pair of seat frame side plates 221, a seat frame front cross tube 222 supported and connected to the front of the pair of seat frame side plates 221, and a connecting rod bracket 223 connected to the seat frame front cross tube 222.

[0088] The specific structure of the seat frame assembly 22 in this invention can be the same as that of the existing seat frame assembly in automobile seats. It can be installed on the slide rail through a linkage mechanism, which can realize the lifting of the front and / or the lifting of the rear, thus realizing the function of seat cushion height adjustment. Alternatively, it can be installed directly on the slide rail without the height adjustment function.

[0089] In one embodiment, as shown in Figures 28 and 29, the other end of the front link 233 of the front link assembly 23 is rotatably connected to the end of the link bracket 223 on the seat frame assembly 22. Preferably, the end of the front link 233 and the corresponding link bracket 223 can be rotatably connected via a front hinge, which can be a stepped bolt, a pin, or other parts capable of rotatable connection. In this embodiment, referring to Figure 30, as the rear of the seat assembly 21 is raised from the solid line position to the dashed line position, the seat assembly 21 rotates around the front hinge point A. During the upward lifting process, the front link assembly 23 also rotates around the front hinge point A. The front hinge point A is the connection point between the front link 233 and the link bracket 223 on the seat frame assembly 22. In this embodiment, the seat assembly 21 has a rear lifting function.

[0090] In another embodiment, as shown in Figures 2 to 5, the car seat further includes a front lift linkage assembly 26 and a front drive mechanism 27. The front lift linkage assembly 26 is disposed between the seat frame assembly 22 and the front linkage assembly 23. The front lift linkage assembly 26 is rotatably connected to the front part of the seat frame assembly 22. The front linkage assembly 23 is rotatably connected to the front lift linkage assembly 26. The front drive mechanism 27 is mounted on the seat frame assembly 22 and is drivenly connected to the front lift linkage assembly 26. It can drive the front lift linkage assembly 26 to rotate upward relative to the seat frame assembly 22, thereby causing the front linkage assembly 23 to rotate upward around its rotatable connection with the front lift linkage assembly 26, thus lifting the front part of the seat basin assembly 21 upward. In this embodiment, the seat basin assembly 21 has both a front lift function and a rear lift function.

[0091] Furthermore, the front lifting linkage assembly 26 includes a lifting connecting rod 261 and lifting connecting rods 262 connected to both ends of the lifting connecting rod 261; both ends of the lifting connecting rod 261 are rotatably connected to the front of the seat frame assembly 22; the lifting connecting rods 262 are rotatably connected to the front connecting rod 233. Preferably, both ends of the lifting connecting rod 261 are rotatably connected to the ends of the connecting rod brackets 223 on the seat frame assembly 22, for example, through pins, bolts, or other parts. One end of the lifting connecting rod 262 is fixedly connected to the corresponding end of the lifting connecting rod 261, and the other end of the lifting connecting rod 262 is rotatably connected to the end of the front connecting rod 233 through a front hinge 234, which can be a stepped bolt, a pin, or other parts capable of rotatable connection.

[0092] Furthermore, a front mounting bracket 224 is provided on the front cross tube 222 of the seat frame; the front drive mechanism 27 is mounted on the front mounting bracket 224.

[0093] The front drive mechanism 27 is telescopically adjustable. When extended forward, it pushes the connected lifting rod 261, allowing the lifting rod 261 to rotate around its axis. This causes the connection between the lifting link 262 and the front link 233 to rotate upward, which in turn causes the front link 231 to rotate upward as well. The front link 231 pushes the front of the seat assembly 21 upward, achieving an upward lifting effect. Conversely, the front drive mechanism 27 can drive the front of the seat assembly 21 to rotate downward, returning it to its designed state. Preferably, the front drive mechanism 27 has a self-locking function, which keeps the seat assembly 21 in the corresponding state, improving the stability of the seat assembly.

[0094] Preferably, the front drive mechanism 27 includes an outer shell and an inner support body disposed within the outer shell. The inner support body is rotatable relative to the outer shell. During installation, the outer shell is fixedly connected to the front mounting bracket 224 by fasteners such as mounting screws and bolts. A lead screw passes through the inner support body, and the motor can drive the lead screw to extend and retract. The end of the lead screw is connected to the lifting connecting rod 261. A connecting frame 263 is provided on the lifting connecting rod 261, and the end of the lead screw is rotatably mounted on the connecting frame 263 through a connector 271. When the motor drives the lead screw to extend and retract, it drives the lifting connecting rod 261 to rotate. At the same time, the rotation of the lifting connecting rod 261 also drives the lead screw to swing, which in turn drives the inner support body to rotate relative to the outer shell. This achieves a certain swing of the lead screw during the extension and retraction adjustment process to drive the lifting connecting rod 261 to rotate upward.

[0095] In one specific embodiment of the present invention, as shown in Figures 3 and 5, a rear mounting bracket 225 is provided on the front cross tube 222 of the seat frame assembly 22, and the rear drive mechanism 25 is rotatably mounted on the rear mounting bracket 225. Preferably, the rear drive mechanism 25 is rotatably mounted on the rear mounting bracket 225 by mounting bolts 251. Of course, this rotatable connection is not limited to mounting bolts, but can also use other parts that can achieve a rotatable connection, such as pins or shafts.

[0096] In one specific embodiment of the present invention, as shown in Figures 2 and 5, the sitz bath assembly 21 can be an integral structure or a split structure, that is, it can be divided into a front half and a rear half, which are connected to the rear half, for example, fixedly connected and cannot rotate relative to each other.

[0097] The car seat of the present invention has two embodiments. The first embodiment has a rear lift function, and the second embodiment has both a rear lift function and a front lift function. The adjustment process of the car seat of the second embodiment of the present invention will be described below.

[0098] As shown in Figures 6 and 7, the seat basin assembly 21 of the car seat is adjusted from the designed state to the rear-lifted state. Combined with Figures 8, 9, and 14, the rear linkage assembly 24 rotates upward under the drive of the rear drive mechanism 25. The rear linkage assembly 24 rotates upward around its connection with the seat frame assembly 22, thereby pushing the rear of the seat basin assembly 21 upward. The upward lifting of the seat basin assembly 21 is around the front hinge point A (the hinge point A is the connection between the front linkage assembly 23 and the front lift linkage 26). During the upward lifting of the rear of the seat basin assembly 21, the front linkage assembly 23 also makes adaptive rotation adjustments around the front hinge point A, realizing the rear-lifting function of the seat basin assembly 21.

[0099] As shown in Figures 10 and 11, the seat basin assembly 21 of the car seat is adjusted from the design state to the forward-lifted state. As shown in Figures 12, 13, and 15, the front lift linkage assembly 26 rotates upward under the drive of the front drive mechanism 27. The end of the front lift linkage assembly 26 connected to the front linkage assembly 23 rotates upward around the end of the front lift linkage assembly 26 connected to the seat frame assembly 22. In turn, the front linkage assembly 23 together drives the front part of the seat basin assembly 21 to lift upward. The upward lifting of the seat basin assembly 21 is around the rear hinge point B (the hinge point B is the connection point between the rear linkage assembly 24 and the seat basin assembly 21), realizing the forward lifting function of the seat basin assembly 21.

[0100] For the effect of lifting the seat cushion forward, please refer to Figures 16 to 19; for the effect of lifting the seat cushion backward, please refer to Figures 24 to 27; Figures 20 to 23 show the effect of the seat cushion in its designed state.

[0101] Figure 31 shows an application scenario of the car seat of the present invention, which realizes the transformation of a single chair into a bed. After the backrest is folded down, the rear of the seat cushion can be raised to be flush with the lower end of the backrest, improving the comfort of the occupant when lying down.

[0102] Figure 32 shows another application scenario of the car seat of the present invention, which realizes the formation of a bed. That is, the front and rear car seats can be folded down and the back of the seat cushions can be raised and adjusted to form a flat bed. The side panels or side wings on both sides of the car seats can also be lowered and adjusted, so that there are no other structural protrusions on the surface of the formed bed, which can improve comfort.

[0103] Figure 33 shows a model lying on a flat car seat with the backrest folded down and the rear of the seat cushion assembly 20 raised to be flush with the lower end of the backrest. In contrast, Figure 34 shows that in the prior art, the car seat backrest 11 is folded down and the seat cushion 12 is tilted, forming a gap 13 between the rear of the seat cushion 12 and the lower end of the backrest 11. This gap 13 is located at the model's buttocks, and its presence affects the comfort of the occupant. The rear-lifting function of the seat cushion assembly 20 of the present invention solves the problem of this gap affecting comfort.

[0104] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A car seat, comprising a seat frame assembly (22) and a seat basin assembly (21) disposed on the upper part of the seat frame assembly (22), characterized in that, The car seat also includes: A front link assembly (23), one end of which is rotatably connected to the front of the seat assembly (21), and the other end of which is rotatably connected to the seat frame assembly (22); The rear link assembly (24) has one end rotatably connected to the rear part of the seat assembly (21) about the rear rotation axis, and the other end rotatably connected to the seat frame assembly (22). The rear drive mechanism (25) is connected to the seat frame assembly (22) and the rear linkage assembly (24) to drive the rear linkage assembly (24) to rotate upward relative to the seat frame assembly (22), thereby causing the front linkage assembly (23) to rotate about the front rotation axis, so as to lift the rear part of the seat assembly (21) relative to the front part of the seat assembly (21).

2. The car seat as described in claim 1, characterized in that, The rear link assembly (24) includes rear links (243) disposed on both sides of the rear of the basin assembly (21), and the rear links (243) are rotatably connected to the rear of the basin assembly (21) and the seat frame assembly (22).

3. The car seat as described in claim 2, characterized in that, The rear link assembly (24) further includes a rear connecting rod (241) fixedly connected between the two rear links (243), and the rear connecting rod (241) is rotatably connected to the seat assembly (21) to form the rear rotation axis; Alternatively, the rear connecting rod (241) may be configured to be rotatably connected to the rear connecting rod (243) to form the rear rotation axis, while being fixedly connected to the sitz bath assembly (21).

4. The car seat as described in claim 3, characterized in that, The rear connecting rod assembly (24) further includes a rear seat connector (242) rotatably sleeved on the rear connecting rod (241), the rear seat connector (242) being fixedly connected to the rear of the seat assembly (21).

5. The car seat as described in claim 2, characterized in that, The rear drive mechanism (25) includes a drive motor and a drive screw. One of the drive motor and the drive screw is connected to the seat frame assembly (22), and the other of the drive motor and the drive screw is connected to at least one rear connecting rod (243). The drive motor drives the drive screw to extend and retract relative to the drive motor, thereby driving the rear connecting rod (243) to rotate upward relative to the seat frame assembly (22) to lift the rear of the seat assembly (21).

6. The car seat as described in claim 5, characterized in that, The at least one rear link (243) includes a first link portion (2431) and a second link portion (2432). One end of the first link portion (2431) is rotatably connected to the seat assembly (21), and the other end of the first link portion (2431) is fixedly connected to one end of the second link portion (2432) at an angle. The other end of the second link portion (2432) is rotatably connected to the seat frame assembly (22) or the drive screw.

7. The car seat as described in claim 1, characterized in that, The seat frame assembly (22) includes a pair of seat frame side plates (221), a front cross tube (222) of the seat frame supported and connected to the front of the pair of seat frame side plates (221), and a connecting rod bracket (223) connected to the front cross tube (222). The connecting rod bracket (223) is rotatably connected to the other end of the front connecting rod assembly (23).

8. The automobile seat as described in claim 7, characterized in that, The front link assembly (23) includes front links (233) disposed on both sides of the front part of the seat assembly (21). One end of the front link (233) is rotatably connected to the front part of the seat assembly (21), and the other end of the front link (233) is rotatably connected to the link bracket (223) to form the front rotation axis. The rear drive mechanism (25) can drive the rear link assembly (24) and thus cause the front link (233) to rotate about the front rotation axis, thereby lifting the rear of the sitz bath assembly (21).

9. The automobile seat as described in claim 8, characterized in that, The front link assembly (23) further includes a front connecting rod (231) connected between the front links (233), the front connecting rod (231) being fixedly connected to the front links (233) and rotatably connected to the sitz bath assembly (21).

10. The car seat as described in claim 9, characterized in that, The front link assembly (23) further includes a front seat connector (232) that is rotatably fitted onto the front connecting rod (231) and is fixedly connected to the front of the seat assembly (21).

11. The automobile seat as described in any one of claims 8 to 10, characterized in that, It also includes a front lifting link assembly (26), which includes a lifting link (262), one end of which is rotatably connected to the link bracket (223), and the other end of which is rotatably connected to the front link (233) to form the front rotation axis. The rear drive mechanism (25) is capable of driving the rear link assembly (24) and thus causing the front link (233) to rotate about the front rotation axis, thereby realizing the upward lifting of the rear of the sitz bath assembly (21).

12. The automobile seat as described in claim 11, characterized in that, There are two lifting links (262), which are respectively disposed on opposite sides of the seat assembly. The front lifting link assembly (26) also includes a lifting connecting rod (261) fixedly connected between the two lifting links (262). The lifting connecting rod (261) is rotatably connected to the link bracket (223).

13. The automobile seat as described in claim 11, characterized in that, It also includes a front drive mechanism (27), which is connected to the seat frame assembly (22) and the front lifting link assembly (26) respectively to drive the front link assembly (23) to rotate upward relative to the seat frame assembly (22), so that the front part of the seat assembly (21) is lifted upward about the rear rotation axis.

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