Zero-gravity seat with backrest forward leveling mechanism

Abstract

The utility model relates to a zero-gravity seat with a backrest forward leveling mechanism. The zero-gravity seat comprises a zero-gravity seat body, a cushion zero-gravity adjusting mechanism, a cushion rear height adjusting mechanism and a cushion position adjusting mechanism, and the rear end of a cushion framework is mounted on the cushion rear height adjusting mechanism through the cushion position adjusting mechanism; the cushion rear height adjusting mechanism comprises two screw rod motors or height adjusting motors symmetrically mounted on the seat framework and two cushion framework lower supporting plates connected with the two screw rod motors or the height adjusting motors, and the cushion framework lower supporting plates drive the cushion position adjusting mechanism and the cushion framework to ascend or descend in the rotating process; the cushion position adjusting mechanism comprises a cushion position adjusting motor, a synchronous rod, two rear transverse pipe adjusting support arms and two rear transverse pipe angle adjusters; the automatic adjustment device has the advantages that the operation is simpler and more convenient, a passenger only needs to press the operation button, the automatic adjustment that the backrest of the seat is flatly placed forwards can be realized, and the use experience of a user is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive seats, and more particularly to a zero-gravity seat with a backrest that can be laid flat forward. Background Technology

[0002] With the increasing popularity of zero-gravity seats, more and more vehicles are now equipped with them. As the functions of zero-gravity seats become more and more diverse, most now have backrest adjustment functions that allow the backrest to be adjusted forward or backward. For example, patent number ZL2024212648353 discloses a utility model patent entitled "A Front Seat That Can Fold Forward Flat". This patent provides a front car seat that can be folded forward flat, but it has the following drawbacks: 1) This structure cannot achieve linkage between the backrest and the seat cushion. During the posture adjustment process, the components need to be adjusted separately, which is more cumbersome and time-consuming, affecting the user experience; 2) When adjusting the seat cushion forward, this structure relies on a single lead screw motor, and the lead screw is relatively long, which increases the force it receives. If it is affected by external forces during the adjustment process, there will be certain safety hazards.

[0003] In addition, the seat back can interfere with the seat cushion and side panels, thus limiting the forward adjustment angle of the seat back and preventing it from reclining completely forward. This greatly restricts the functional expansion of the seat and fails to better meet passengers' needs for interior space. Furthermore, the operation of folding the seat back forward in existing cars is cumbersome, often requiring the individual adjustment of multiple components (seat cushion, backrest, headrest, plastic parts, etc.) in sequence, which involves many steps and causes considerable inconvenience to users. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a zero-gravity seat with a backrest that can be laid flat forward, in order to solve the problems of spatial interference and inconvenient operation in the prior art, and improve the functionality and operability of the seat.

[0005] This utility model provides a zero-gravity seat with a backrest that can be laid flat forward, comprising: a zero-gravity seat and a zero-gravity adjustment mechanism for a seat cushion mounted on the zero-gravity seat. The zero-gravity adjustment mechanism for the seat cushion is used to adjust the height of the front end of the seat cushion frame. The feature is that it further comprises: a rear seat cushion height adjustment mechanism for adjusting the height of the rear cross tube of the seat cushion frame, and a seat cushion position adjustment mechanism for adjusting the seat cushion frame back and forth in the horizontal direction. The rear end of the seat cushion frame is mounted on the rear seat cushion height adjustment mechanism through the seat cushion position adjustment mechanism.

[0006] As a preferred embodiment of this utility model, the rear height adjustment mechanism of the seat cushion includes: two lead screw motors symmetrically mounted on the seat frame, and two lower support plates of the seat frame fixedly connected to the lead screws of the two lead screw motors. The two lower support plates of the seat frame are located at the rear end of the seat frame and are hinged to both sides of the seat frame below the seat frame. The two lead screw motors drive the lower support plates of the seat frame to rotate around the hinge axis. During the rotation of the lower support plates of the seat frame, the seat position adjustment mechanism and the seat frame are raised or lowered.

[0007] As a preferred embodiment of this utility model, the rear height adjustment mechanism of the seat cushion includes: two drive motors symmetrically mounted on the seat frame, drive wheels connected to the output shafts of the two drive motors, and two lower support plates of the seat frame meshing with the two drive wheels. The two lower support plates of the seat frame are located at the rear end of the seat frame and are hinged to both sides of the seat frame below the seat frame. The two drive motors drive the lower support plates of the seat frame to rotate around the hinge axis through the drive wheels. During the rotation of the lower support plates of the seat frame, the seat position adjustment mechanism and the seat frame are raised or lowered.

[0008] As a preferred embodiment of this utility model, the seat position adjustment mechanism includes: a seat position adjustment motor, a synchronizing rod, two rear cross tube adjustment arms, and two rear cross tube angle adjusters. The rear cross tube is located at the rear end of the seat frame and is fixedly connected to the seat frame. One end of each of the two rear cross tube adjustment arms is rotatably connected to the rear cross tube and located at both ends of the rear cross tube. The other end of each of the two rear cross tube adjustment arms is rotatably connected to the two lower support plates of the seat frame through the two rear cross tube angle adjusters. The seat position adjustment motor is installed on one of the lower support plates of the seat frame and drives the two rear cross tube angle adjusters through the synchronizing rod. The two rear cross tube angle adjusters drive the two rear cross tube adjustment arms, and the two rear cross tube adjustment arms drive the seat frame position adjustment through the rear cross tube.

[0009] In this process, after the seat cushion position adjustment mechanism moves the seat cushion frame forward and makes room for the backrest to lie flat, the backrest is adjusted forward to lie flat by the backrest angle adjuster.

[0010] As a preferred embodiment of this invention, the bottom of the lower support plate of the seat cushion frame is provided with a toothed edge, which meshes with the drive wheel.

[0011] As a preferred embodiment of this utility model, the bottom end of the lower support plate of the seat cushion frame is provided with a hinge hole for connecting the hinge shaft and a waist-shaped hole for angle adjustment and limiting. The seat frame is provided with a hinge shaft and a limiting shaft at the positions corresponding to the hinge hole and the waist-shaped hole.

[0012] As a preferred embodiment of this utility model, a backrest angle adjustment device is provided on the lower support plate of the seat cushion frame above the rear cross tube angle adjuster, and the backrest angle adjustment device is used to drive the backrest to adjust the angle.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The seat cushion frame and backrest of this utility model are independent structures, realizing the function of independent movement of the backrest and seat cushion, solving the problem of space interference when the seat backrest is laid forward, and enabling the seat to be laid flat forward to effectively expand the interior space and better meet the needs of passengers.

[0015] 2. The seat backrest forward-flattening mechanism of this utility model is easier to operate. Passengers only need to press the operation button to realize the automatic adjustment of the seat backrest forward-flattening, which greatly improves the user experience. Attached Figure Description

[0016] Other objects and results of this invention will become more apparent and readily understood with reference to the following description taken in conjunction with the accompanying drawings, and with a more complete understanding of the invention. In the drawings:

[0017] Figure 1 This is a schematic diagram of the initial state (sitting state) of the seat frame before adjustment in Embodiment 1 of this utility model.

[0018] Figure 2 This is a front view of the initial state of the seat frame before adjustment in Embodiment 1 of this utility model.

[0019] Figure 3 This is a schematic diagram showing the front and rear ends of the seat frame in Embodiment 1 of this utility model adjusted to the highest position.

[0020] Figure 4 The front view shows the seat frame in Embodiment 1 of this utility model with both the front and rear ends adjusted to the highest position.

[0021] Figure 5 This is a schematic diagram showing the rear end of the seat frame in Embodiment 1 of this utility model adjusted to the highest position and the front end adjusted to the lowest position.

[0022] Figure 6 The rear end of the seat frame in Embodiment 1 of this utility model is adjusted to the highest position and the front end is adjusted to the lowest position in the front view.

[0023] Figure 7 This is a schematic diagram of the seat position adjustment mechanism driving the seat frame forward in Embodiment 1 of this utility model.

[0024] Figure 8This is a front view of the seat position adjustment mechanism in Embodiment 1 of this utility model after driving the seat frame forward.

[0025] Figure 9 This is a schematic diagram of the backrest folding down in Embodiment 1 of this utility model.

[0026] Figure 10 This is a front view of the backrest folded down in Embodiment 1 of this utility model.

[0027] Figure 11 This is a front view of the initial state of the seat frame before adjustment in Embodiment 2 of this utility model.

[0028] Reference numerals in the attached drawings: 1. Seat cushion zero-gravity adjustment mechanism; 101. Seat cushion zero-gravity adjustment screw motor; 102. Seat cushion frame zero-gravity adjustment support arm; 2. Seat cushion frame; 3. Rear cross tube; 4. Seat cushion rear height adjustment mechanism; 401. Screw motor; 402. Seat cushion frame lower support plate; 403. Screw; 5. Seat cushion position adjustment mechanism; 501. Seat cushion position adjustment motor; 502. Synchronizing rod; 503. Rear cross tube adjustment support arm; 504. Rear cross tube angle adjuster; 6. Backrest angle adjustment angle adjuster; 7. Hinge hole; 8. Second seat cushion rear height adjustment mechanism; 801. Drive motor; 802. Drive wheel; 803. Toothed edge. Detailed Implementation

[0029] Example 1

[0030] See Figure 1-10As shown, this embodiment provides a zero-gravity seat with a backrest that can be laid flat forward. It includes: a zero-gravity seat, a zero-gravity seat cushion adjustment mechanism 1 mounted on the zero-gravity seat, a rear seat cushion height adjustment mechanism 4 for adjusting the height of the rear cross tube 3 of the seat cushion frame 2, and a seat cushion position adjustment mechanism 5 for adjusting the seat cushion frame 2 horizontally forward and backward. The zero-gravity seat cushion adjustment mechanism 1 adjusts the height of the front end of the seat cushion frame 2, and the rear end of the seat cushion frame is mounted on the rear seat cushion height adjustment mechanism 4 via the seat cushion position adjustment mechanism 5. The rear seat cushion height adjustment mechanism 4 includes: two lead screw motors 401 symmetrically mounted on the seat frame 2, and two lower seat cushion frame support plates 402 fixedly connected to the lead screws 403 of the two lead screw motors 401. The two lower seat cushion frame support plates 402 are located at the rear end of the seat cushion frame 2 and are hinged to the sides of the seat frame below the seat cushion frame 2. The two lead screw motors 401 push the lower seat cushion frame support plates... The plate 402 rotates around the hinge axis. During the rotation of the lower support plate 402 of the seat cushion frame, it drives the seat cushion position adjustment mechanism 5 and the seat cushion frame 2 to lift or lower. The seat cushion position adjustment mechanism 5 includes: a seat cushion position adjustment motor 501, a synchronizing rod 502, two rear cross tube adjustment arms 503, and two rear cross tube angle adjusters 504. The rear cross tube 3 is located at the rear end of the seat cushion frame 2 and is fixedly connected to the seat cushion frame 2. One end of each of the two rear cross tube adjustment arms 503 is rotatably connected to the rear cross tube 3 and located at the rear cross tube 3. At both ends, the other ends of the two rear cross tube adjusting arms 503 are rotatably connected to the two seat cushion frame lower support plates 402 via two rear cross tube angle adjusters 504. A seat cushion position adjusting motor 501 is mounted on one of the seat cushion frame lower support plates 402 and drives the two rear cross tube angle adjusters 504 via a synchronizing rod 502. The two rear cross tube angle adjusters 504 drive the two rear cross tube adjusting arms 503, and the two rear cross tube adjusting arms 503 drive the seat cushion frame 2 to adjust its position via the rear cross tube 3. The bottom end of the seat cushion frame lower support plate 402 has a hinge hole 7 for connecting the hinge shaft and a waist-shaped hole for angle adjustment limiting. The seat frame has hinge shafts and limiting shafts at positions corresponding to the hinge hole and waist-shaped hole. A backrest angle adjusting angle adjuster 6 is located on the seat cushion frame lower support plate 402 above the rear cross tube angle adjuster 504, and the backrest angle adjusting angle adjuster 6 is used to adjust the backrest angle.

[0031] Work process:

[0032] Step S1: When a passenger has a greater need for interior space and needs to recline the seat back forward, the passenger can press the operation button on the controller. After receiving the signal, the controller starts two lead screw motors 401. The two lead screw motors 401 move synchronously and push the two lower support plates 402 of the seat cushion frame to rotate around the hinge axis through the adjusting lead screw. During the rotation, the two lower support plates 402 of the seat cushion frame drive the rear cross tube adjuster 504 and the rear cross tube adjusting arm 503 installed on the lower support plates 402 of the seat cushion frame to lift. At the same time, the rear cross tube adjusting arm 503 drives the seat cushion frame 2 to lift its position, thus completing the height adjustment of the rear end of the seat cushion frame 2.

[0033] Step S2: While adjusting the rear end of the seat frame 2 in step S1, the front end of the seat frame 2 is lowered (slightly tilted forward) using the zero gravity adjustment mechanism 1. Specifically, the zero gravity adjustment screw motor 101 pushes the zero gravity adjustment arm 402 of the seat frame 2, which in turn lowers the front end of the seat frame 2 to make room for the rear seat to be adjusted forward.

[0034] Step S3: Synchronously start the footrest motor, which drives the footrest from the initial closed state to the unfolded state;

[0035] Step S4: After the adjustment is completed in steps S1 to S3, the seat position adjustment motor 501 drives the synchronous rod 502 to drive the two rear cross tube angle adjusters 504. The two rear cross tube angle adjusters 504 synchronously drive the two rear cross tube adjustment arms 503. The two rear cross tube adjustment arms 503 push the rear cross tube 3 together with the seat frame 2 to move forward, completing the preparation work for the backrest to recline forward. The two rear cross tube adjustment arms 503 and the two seat frame zero gravity adjustment arms 102 form a four-bar linkage mechanism to support the seat frame 2, so as to ensure the stable movement of the seat frame 2.

[0036] Step S5: After step S4 is completed, use the backrest angle adjustment motor to drive the backrest angle adjustment mechanism 6 to rotate the backrest forward until it is flat.

[0037] Example 2

[0038] See Figure 11As shown, the second seat cushion rear height adjustment mechanism 8 provided in this embodiment includes: two drive motors (height adjustment motors) 801 symmetrically mounted on the seat frame 2, drive wheels 802 connected to the output shafts of the two drive motors 801, and two seat cushion frame lower support plates 402 meshing with the two drive wheels 802. The bottom of the seat cushion frame lower support plates 402 is provided with toothed edges 803, which mesh with the drive wheels 802. The two seat cushion frame lower support plates 402 are located at the rear end of the seat cushion frame 2, and are hinged to both sides of the seat frame below the seat cushion frame 2. The two drive motors 801 push the seat cushion frame lower support plates 402 to rotate around the hinge axis. During the rotation of the seat cushion frame lower support plates 402, the seat cushion position adjustment mechanism 5 and the seat cushion frame 2 are raised or lowered. A protective cover is added to the outside of the toothed edges 803.

[0039] The rest of the structure is the same as in Example 1.

[0040] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A zero-gravity seat with a backrest that reclines forward, comprising: A zero-gravity seat and a zero-gravity adjustment mechanism for a seat cushion installed on the zero-gravity seat, wherein the zero-gravity adjustment mechanism is used to adjust the height of the front end of the seat cushion frame, characterized in that it further includes: a rear seat cushion height adjustment mechanism for adjusting the height of the rear cross tube of the seat cushion frame, and a seat cushion position adjustment mechanism for adjusting the seat cushion frame back and forth in the horizontal direction, wherein the rear end of the seat cushion frame is installed on the rear seat cushion height adjustment mechanism through the seat cushion position adjustment mechanism.

2. A zero-gravity seat with a backrest that reclines forward as described in claim 1, characterized in that, The seat cushion rear height adjustment mechanism includes: two lead screw motors symmetrically mounted on the seat frame, and two seat cushion frame lower support plates fixedly connected to the lead screws of the two lead screw motors. The two seat cushion frame lower support plates are located at the rear end of the seat cushion frame and are hinged to the two sides of the seat frame below the seat cushion frame. The two lead screw motors drive the seat cushion frame lower support plates to rotate around the hinge axis. During the rotation of the seat cushion frame lower support plates, the seat cushion position adjustment mechanism and the seat cushion frame are raised or lowered.

3. A zero-gravity seat with a backrest that reclines forward as described in claim 1, characterized in that, The seat cushion rear height adjustment mechanism includes: two drive motors symmetrically mounted on the seat frame, drive wheels connected to the output shafts of the two drive motors, and two seat cushion frame lower support plates meshing with the two drive wheels. The two seat cushion frame lower support plates are located at the rear end of the seat cushion frame and are hinged to both sides of the seat frame below the seat cushion frame. The two drive motors drive the seat cushion frame lower support plates to rotate around the hinge axis through the drive wheels. During the rotation of the seat cushion frame lower support plates, the seat cushion position adjustment mechanism and the seat cushion frame are raised or lowered.

4. A zero-gravity seat with a backrest that reclines forward as described in claim 1, characterized in that, The seat position adjustment mechanism includes: a seat position adjustment motor, a synchronizing rod, two rear cross tube adjustment arms, and two rear cross tube angle adjusters. The rear cross tube is located at the rear end of the seat frame and is fixedly connected to the seat frame. One end of each of the two rear cross tube adjustment arms is rotatably connected to the rear cross tube and located at both ends of the rear cross tube. The other end of each of the two rear cross tube adjustment arms is rotatably connected to the two lower support plates of the seat frame through the two rear cross tube angle adjusters. The seat position adjustment motor is installed on one of the lower support plates of the seat frame and drives the two rear cross tube angle adjusters through the synchronizing rod. The two rear cross tube angle adjusters drive the two rear cross tube adjustment arms, and the two rear cross tube adjustment arms drive the seat frame position adjustment through the rear cross tube. In this process, after the seat cushion position adjustment mechanism moves the seat cushion frame forward and makes room for the backrest to lie flat, the backrest is adjusted forward to lie flat by the backrest angle adjuster.

5. A zero-gravity seat with a backrest that reclines forward as described in claim 2, characterized in that, The bottom of the lower support plate of the seat cushion frame is provided with a toothed edge, which meshes with the drive wheel.

6. A zero-gravity seat with a backrest that reclines forward as described in claim 2 or 3, characterized in that, The bottom end of the lower support plate of the seat cushion frame is provided with a hinge hole for connecting the hinge shaft and a waist-shaped hole for angle adjustment and limiting. The seat frame is provided with a hinge shaft and a limiting shaft at the positions corresponding to the hinge hole and the waist-shaped hole.

7. A zero-gravity seat with a backrest that reclines forward as described in any one of claims 2-5, characterized in that, A backrest angle adjuster is provided on the lower support plate of the seat cushion frame above the rear cross tube angle adjuster. The backrest angle adjuster is used to adjust the backrest angle.

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