Cushion adjustment mechanism and seat

Abstract

The application discloses a seat cushion adjusting mechanism, which comprises left and right seat cushion side plates, a front pipe, a rear pipe, left and right front upper connecting rods, left and right front lower connecting rods, a synchronous rod, left and right rear connecting rods and a height adjusting motor assembly. When the height of the seat cushion is adjusted, the height adjusting motor assembly drives the left and right rear connecting rods, the left and right front lower connecting rods, the left and right front upper connecting rods and the left and right seat cushion side plates to move, linkage of the connecting rods of the five connecting rod mechanism is realized, and the angle of the seat cushion basically remains unchanged during the height adjustment of the seat cushion.

Description

Technical Field

[0001] This invention relates to the field of seat technology, and particularly to a seat cushion adjustment mechanism and a seat including the seat cushion adjustment mechanism. The seat can be used in motor vehicles, especially passenger cars. Background Technology

[0002] Four-bar linkages are commonly used in car seat height adjustment. A four-bar linkage has only one degree of freedom, allowing the seat cushion to move along a fixed trajectory. When an occupant sits in the seat, the distance between their thigh and the front of the seat cushion frame differs for occupants of the same height but different weights, resulting in varying pressure on their thighs. Therefore, existing seats with four-bar linkages as the height adjustment mechanism cannot simultaneously meet the comfort needs of occupants of the same height but different weights.

[0003] CN206049420U discloses a five-link seat height adjustment mechanism, wherein the left and right side slide rail connecting plates are connected to the vehicle floor via slide rails; one end of the left and right front lower connecting rods is bolted to the left and right side slide rail connecting plates, and the other end of the left and right front lower connecting rods is bolted to one end of the left and right front upper connecting rods and the left and right side panels; the other end of the left and right front upper connecting rods is welded to a rotating bushing to form a left and right welded assembly; a front crossbeam passes through the left and right welded assembly and is welded to the left and right side panels; one end of the left and right rear connecting rods is bolted to the left and right slide rail connecting plates, and the other end of the left and right rear connecting rods is welded to the rear crossbeam, which is riveted to the left and right side panels. A lead screw motor is fixed to the side panel of the seat cushion, and one end of the lead screw is hinged to the front upper connecting rod. The lead screw motor can drive the front upper connecting rod to rotate, thereby adjusting the height of the front end of the seat cushion.

[0004] In this existing technology, the lead screw motor is fixed to the side panel of the seat cushion, which is too close to the occupant / dummy, resulting in poor seat comfort. Furthermore, because the lead screw motor is a push-type drive, the relative positions of the lead screw and the synchronizing rod are limited, resulting in a small overall adjustment stroke. This only applies to adjustments at the front of the seat cushion and cannot achieve the zero-gravity function. When adjusting the rear height, the mechanism is a four-bar linkage (because the fifth link is locked by the motor), and it is typically a non-parallelogram mechanism. During rear height adjustment, the angle between the seat cushion and the horizontal plane is not constant (this angle may increase or decrease depending on the length relationship between the front and rear links), which causes a significant passive change in the seat cushion angle. In addition, the front crossbeam and the upper front link are rotatably connected, and the front adjustment motor can only lock one side of the five-bar linkage, while the other side is free. This results in a significant difference in the rigidity of the left and right sides of the structure. In addition, due to various limitations of the four-bar linkage used for seat height adjustment (such as limitations on height adjustment travel and linkage force), it is difficult to achieve equal lengths for the front and rear linkages in the four-bar linkage. Therefore, during the seat height adjustment process, there is a problem that the seat cushion angle is passively and significantly changed. Summary of the Invention

[0005] One of the technical problems to be solved by the present invention is to provide an improved seat cushion adjustment mechanism, in particular to solve the problem that the seat cushion angle will passively change undesirably during the seat height adjustment process.

[0006] The second technical problem to be solved by this invention is to provide a seat, especially a zero-gravity seat, that includes the aforementioned seat cushion adjustment mechanism. The seat can be used in motor vehicles, especially passenger vehicles.

[0007] To achieve the objectives of this invention, one aspect of the invention relates to a seat adjustment mechanism, comprising:

[0008] Left seat cushion side panel and right seat cushion side panel;

[0009] A front tube, the left end of which is fixedly connected to the front side of the left seat cushion side plate, and the right end of which is fixedly connected to the front side of the right seat cushion side plate.

[0010] A rear tube, the left end of which is hinged to the rear side of the left seat cushion side plate, and the right end of which is hinged to the rear side of the right seat cushion side plate.

[0011] The left rear link and the right rear link, wherein the upper end of the left rear link is fixedly connected to the left end of the rear tube, and the upper end of the right rear link is fixedly connected to both ends of the rear tube;

[0012] The upper left front link and the upper right front link are provided. The upper end of the upper left front link is hinged to the front side of the left seat cushion side plate, and the upper end of the upper right front link is hinged to the front side of the right seat cushion side plate.

[0013] The seat cushion adjustment mechanism is characterized in that it further includes:

[0014] Left front lower linkage, right front lower linkage, a synchronizing rod and a high-speed motor assembly;

[0015] The lower end of the left front upper link is hinged to the left front lower link, and the lower end of the right front upper link is hinged to the right front lower link.

[0016] The left end of the synchronizing rod is fixedly connected to the left front lower connecting rod, and the right end of the synchronizing rod is fixedly connected to the right front lower connecting rod.

[0017] One end of the high-adjustment motor assembly is hinged to the front tube, and the other end of the high-adjustment motor assembly is hinged to the left rear connecting rod;

[0018] The seat adjustment mechanism also includes a structural component that hinges the right rear link to the right front lower link. The structural component is either a zero-gravity motor assembly or a link.

[0019] The high-adjustment motor assembly is configured to drive the left rear link, right rear link, left front lower link, right front lower link, left front upper link, right front upper link, as well as the left and right seat cushion side panels to move when the seat cushion height is adjusted, so as to realize the linkage of each link of the five-bar linkage and ensure that the seat cushion angle does not change passively during the seat height adjustment process.

[0020] The structural component is a zero-gravity motor assembly. One end of the zero-gravity motor assembly is hinged to the right front lower link, and the other end is hinged to the right rear link. The zero-gravity motor assembly is configured to drive the seat cushion to a zero-gravity position during zero-gravity adjustment. Furthermore, during seat cushion height adjustment, the left and right rear links rotate. The rotation of the right rear link drives the right front lower link to rotate via the zero-gravity motor assembly, and the rotation of the right front lower link drives the left front lower link to rotate via a synchronizing rod. Alternatively...

[0021] The structural component is a connecting rod, one end of which is hinged to the right front lower connecting rod, and the other end of which is hinged to the right rear connecting rod. During seat height adjustment, the left rear connecting rod and the right rear connecting rod rotate. The rotation of the right rear connecting rod drives the right front lower connecting rod to rotate through the structural component, and the rotation of the right front lower connecting rod drives the left front lower connecting rod to rotate through a synchronizing rod.

[0022] In a preferred embodiment of the present invention, one end of the structural component is hinged to the right front lower link, and the other end of the structural component is hinged to the right rear link.

[0023] In a preferred embodiment of the present invention, the high-tuning motor assembly includes: a high-tuning motor and a transmission mechanism hinged to the high-tuning motor.

[0024] In a preferred embodiment of the present invention, the high-adjustment motor assembly includes: a high-adjustment motor, a high-adjustment lead screw driven by the high-adjustment motor, and a high-adjustment threaded tube driven by the high-adjustment lead screw; one end of the high-adjustment motor assembly is hinged to the front tube, and the other end of the high-adjustment threaded tube is hinged to the left rear connecting rod; when adjusting the seat height, the high-adjustment motor drives the high-adjustment threaded tube to extend or retract via the high-adjustment lead screw. Here, the high-adjustment lead screw and the high-adjustment threaded tube constitute a lead screw and nut mechanism.

[0025] In a preferred embodiment of the present invention, the high-tuning motor assembly further includes a high-tuning motor bracket, the high-tuning motor bracket being fixedly connected to the front tube, and the high-tuning motor in the high-tuning motor assembly being hinged to the high-tuning motor bracket.

[0026] In a preferred embodiment of the present invention, the left front lower link and the right front lower link, as well as the left rear link and the right rear link, are respectively hinged to the slide rail assembly or the floor.

[0027] In a preferred embodiment of the present invention, the seat adjustment mechanism further includes a slide rail assembly, the slide rail assembly including a left slide rail assembly and a right slide rail assembly.

[0028] In a preferred embodiment of the present invention, the left front lower link is hinged to the front end of the upper left slide rail in the left slide rail assembly, and the right front lower link is hinged to the front end of the upper right slide rail in the right slide rail assembly; and / or the lower end of the left rear link is hinged to the rear side of the upper left slide rail in the left slide rail assembly, and the lower end of the right rear link is hinged to the rear side of the upper right slide rail in the right slide rail assembly.

[0029] In a preferred embodiment of the present invention, the structural component is a zero-gravity motor assembly. One end of the zero-gravity motor assembly is hinged to the right front lower link, and the other end of the zero-gravity motor assembly is hinged to the right rear link. The zero-gravity motor assembly is configured to drive the seat cushion to a zero-gravity position during zero-gravity adjustment. During the seat cushion height adjustment process, the left rear link and the right rear link rotate. The rotation of the right rear link drives the right front lower link to rotate via the zero-gravity motor assembly, and the rotation of the right front lower link drives the left front lower link to rotate via a synchronizing rod.

[0030] In a preferred embodiment of the present invention, the zero-gravity motor assembly includes a zero-gravity motor and a transmission mechanism hinged to the zero-gravity motor.

[0031] In a preferred embodiment of the present invention, the zero-gravity motor assembly includes: a zero-gravity motor, a zero-gravity lead screw driven by the zero-gravity motor, and a zero-gravity threaded tube driven by the zero-gravity lead screw; the zero-gravity motor is hinged to the right front lower connecting rod, and the end of the zero-gravity threaded tube is hinged to the right rear connecting rod; when adjusting the seat cushion to zero gravity, the zero-gravity motor drives the zero-gravity threaded tube to extend and retract via the zero-gravity lead screw, driving the seat cushion to adjust to the zero-gravity position. Here, the zero-gravity lead screw and the zero-gravity threaded tube constitute a lead screw and nut mechanism.

[0032] In a preferred embodiment of the present invention, the hinge point between the lower end of the right rear link and the slide rail assembly or the floor is located above the hinge point between the other end of the zero gravity motor assembly and the right rear link; or the hinge point between the lower end of the right rear link and the slide rail assembly or the floor is located below the hinge point between the other end of the zero gravity motor assembly and the right rear link; or the hinge point between the lower end of the right rear link and the slide rail assembly or the floor and the hinge point between the other end of the zero gravity motor assembly and the right rear link are coaxial in the Y direction.

[0033] In a preferred embodiment of the present invention, the seat adjustment mechanism further includes a slide rail assembly, which includes a left slide rail assembly and a right slide rail assembly. The rear hinge point of the right rear link with the upper right slide rail in the right slide rail assembly is located above the hinge point between the end of the zero-gravity threaded tube in the zero-gravity motor assembly and the right rear link; or the rear hinge point of the right rear link with the upper right slide rail in the right slide rail assembly is located below the hinge point between the end of the zero-gravity threaded tube in the zero-gravity motor assembly and the right rear link; or the rear hinge point of the right rear link with the upper right slide rail in the right slide rail assembly and the hinge point between the end of the zero-gravity threaded tube in the zero-gravity motor assembly and the right rear link are coaxial in the Y direction.

[0034] In the context of this invention, the Y-direction refers to the lateral direction of the seat. Typically, when the seat is installed in a vehicle, the Y-direction coincides with the Y-direction of the vehicle coordinate system, or the lateral direction of the vehicle.

[0035] In a preferred embodiment of the present invention, the seat adjustment mechanism further includes a slide rail assembly, which includes a left slide rail assembly and a right slide rail assembly, wherein the zero gravity motor assembly is located inside the right slide rail assembly and adjacent to the right slide rail assembly, and the zero gravity motor is located slightly above the inside of the right slide rail assembly.

[0036] In a preferred embodiment of the present invention, the seat adjustment mechanism further includes a slide rail assembly, which includes a left slide rail assembly and a right slide rail assembly, wherein the high-adjustment motor assembly is located inside the left slide rail assembly and adjacent to the left slide rail assembly.

[0037] In a preferred embodiment of the present invention, the seat cushion adjustment mechanism further includes a connecting rod, which replaces the aforementioned zero-gravity motor assembly. One end of the connecting rod is hinged to the right front lower connecting rod, and the other end of the connecting rod is hinged to the right rear connecting rod. During seat cushion height adjustment, the left rear connecting rod and the right rear connecting rod rotate. The rotation of the right rear connecting rod drives the right front lower connecting rod to rotate via the connecting rod, and the rotation of the right front lower connecting rod drives the left front lower connecting rod to rotate via a synchronizing rod.

[0038] A second aspect of the invention relates to a seat that includes a cushion adjustment mechanism according to any of the above embodiments.

[0039] In a preferred embodiment of the present invention, during the adjustment process of the seat adjustment mechanism from the initial state to the zero-gravity state, a zero-gravity motor assembly can be used to adjust the relative angle between the right front lower link and the right rear link. The right rear link can adjust the position of the rear tube. While the rear tube is being adjusted, the position of the left rear link is also adjusted. Simultaneously, the position of the front tube is adjusted using a non-operating high-adjustment motor assembly. Then, the position of the left front upper link is adjusted via the front tube and the left seat side panel. Therefore, by adjusting the relative angle between the left front lower link and the left rear link, the zero-gravity angle adjustment of the seat is achieved.

[0040] Furthermore, in a preferred embodiment of the present invention, the zero-gravity motor is located slightly above the inner side of the right slide rail assembly, away from the center line of the human body, resulting in better comfort during the adjustment process of the zero-gravity motor assembly. Simultaneously, during zero-gravity adjustment, the zero-gravity motor lead screw is away from the synchronizing rod, thus enabling large-angle adjustments of the seat cushion specifically for the zero-gravity function.

[0041] In a preferred embodiment of the present invention, in the seat cushion adjustment mechanism, when adjusting the seat cushion height, the height adjustment motor assembly is activated (at this time, the zero-gravity motor assembly is not working; it acts like a connecting rod, linking the right front lower connecting rod and the right rear connecting rod). This height adjustment motor assembly enables the movement of the front tube and the left rear connecting rod. The front tube simultaneously drives the left front upper connecting rod and the right front upper connecting rod through the left and right seat cushion side panels. The movement of the left front upper connecting rod and the right front upper connecting rod, in turn, drives the left front lower connecting rod and the right front lower connecting rod. In addition, the left rear connecting rod drives the rear tube to move, and the rear tube synchronously drives the right rear connecting rod to move, thereby realizing the seat cushion height adjustment. During the seat cushion height adjustment process, the angle of the left rear connecting rod and the right rear connecting rod changes, driving the left front lower connecting rod and the right front lower connecting rod to move in tandem, realizing simultaneous height adjustment of the front and rear ends of the seat cushion. This can essentially keep the seat cushion angle constant; typically, the angle change is virtually imperceptible to the occupant. At this point, because the right front lower linkage and the right rear linkage are linked, the zero-gravity motor assembly will not be significantly pulled. During the simultaneous height adjustment of the front and rear ends of the seat cushion, the linkages of the five-bar mechanism are linked, thus enabling simultaneous height adjustment of the front and rear ends of the seat cushion while essentially maintaining a constant seat cushion angle.

[0042] In a preferred embodiment of the present invention, the left and right ends of the synchronizing rod are fixedly connected to the left front lower connecting rod and the right front lower connecting rod, thus connecting the left front lower connecting rod and the right front lower connecting rod together. The left front lower connecting rod and the right front lower connecting rod are rigidly connected and can transmit motion through the synchronizing rod. The connection relationship between the rear tube and the left rear connecting rod and the right rear connecting rod is similar.

[0043] In a preferred embodiment of the present invention, compared with the prior art, the present invention may have the following characteristics:

[0044] 1. This invention can adjust both the front and rear of the seat cushion. By working together with these two adjustment methods, it can achieve a "zero-gravity posture" and meet the seat cushion height requirements of passengers of different heights, thereby improving comfort.

[0045] 2. The zero-gravity motor assembly hinges the right front lower link to the right rear link and is located slightly above the inside of the right slide rail assembly, below the seat cushion, away from the body's center of gravity. The zero-gravity motor assembly improves comfort without relying on the slide rail.

[0046] 3. By directly hinged the left front lower link to the left rear link through the zero-gravity motor assembly, the motor mounting bracket can be saved, reducing costs.

[0047] 4. In adjusting the seat height, the rear end of the seat can be adjusted by changing the angles of the left and right rear links and utilizing the linkage of each link in the five-bar linkage mechanism. Attached Figure Description

[0048] Figure 1 This is a perspective view of the seat adjustment mechanism of the present invention from one direction.

[0049] Figure 2 This is a top view of the seat adjustment mechanism of the present invention from one direction.

[0050] Figure 3 This is an exploded view of the seat adjustment mechanism of the present invention.

[0051] Figure 4 This is a side view of the seat adjustment mechanism (with zero gravity function) of Embodiment 1 of the present invention.

[0052] Figure 5 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 1 of the present invention in the highest high and forward-leaning design position (with zero gravity function).

[0053] Figure 6 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 1 of the present invention in the lowest high-adjustment, forward-leaning design position (with zero-gravity function).

[0054] Figure 7 This is a simplified schematic diagram of a first four-bar linkage and a second four-bar linkage (with zero-gravity function) compared to the seat adjustment mechanism of Embodiment 1 of the present invention. In the diagram: solid lines indicate the first and second four-bar linkages in their initial positions, and dashed lines indicate the first and second four-bar linkages in their adjusted positions.

[0055] Figure 8 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 2 of the present invention in the highest high and forward-leaning design position (without zero gravity function).

[0056] Figure 9 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 2 of the present invention in the lowest high-adjustment, forward-leaning design position (without zero-gravity function).

[0057] Figure 10 This is a side view of the seat adjustment mechanism (with zero gravity function) of Embodiment 3 of the present invention.

[0058] Figure 11 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 3 of the present invention in the highest high and forward-leaning design position (with zero gravity function).

[0059] Figure 12 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 3 of the present invention in the lowest high-adjustment, forward-leaning design position (with zero-gravity function).

[0060] Figure 13 This is a simplified schematic diagram of a third type of four-bar linkage (with zero-gravity function) compared to the seat adjustment mechanism of Embodiment 3 of the present invention. In the diagram: solid lines represent the third type of four-bar linkage in its initial position, and dashed lines represent the third type of four-bar linkage in its adjusted position.

[0061] Figure 14 This is a side view of the seat adjustment mechanism (with zero gravity function) of Embodiment 4 of the present invention.

[0062] Figure 15 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 4 of the present invention in the highest high and forward-leaning design position (with zero gravity function).

[0063] Figure 16 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 4 of the present invention in the lowest high-adjustment, forward-leaning design position (with zero-gravity function).

[0064] Figure 17 The diagram shows simplified schematics of the fourth and fifth four-bar linkage mechanisms (with zero-gravity function) compared to the seat adjustment mechanism of Embodiment 4 of the present invention. In the diagram, solid lines indicate the fourth and fifth four-bar linkage mechanisms in their initial positions, while dashed lines indicate the fourth and fifth four-bar linkage mechanisms in their adjusted positions.

[0065] Figure 18 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 5 of the present invention in the highest high and forward-leaning design position (without zero gravity function).

[0066] Figure 19 This is a simplified schematic diagram of the seat adjustment mechanism of Embodiment 5 of the present invention in the lowest high-adjustment, forward-leaning design position (without zero-gravity function).

[0067] Figure 20 This is a simplified schematic diagram of the seat adjustment mechanism of the present invention in a zero-gravity state.

[0068] Figure 21 This is a perspective view of the seat adjustment mechanism of the present invention in a zero-gravity state. Detailed Implementation

[0069] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Hereinafter, "left" and "right" are views from the rear to the front of the seat.

[0070] See Figures 1 to 3The seat adjustment mechanism shown in the diagram includes: a slide rail assembly, a left seat cushion side panel 10a, a right seat cushion side panel 10b, a front tube 20, a rear tube 30, a left front lower link 40a, a right front lower link 40b, a synchronizing rod 50, a left front upper link 70a, a right front upper link 70b, a left rear link 80a, a right rear link 80b, a zero-gravity motor assembly 90, and a height adjustment motor assembly 100. Of course, the slide rail assembly and the zero-gravity motor assembly 90 can be configured as needed. If zero-gravity adjustment of the seat cushion is not required, the zero-gravity motor assembly 90 can be omitted. If sliding adjustment of the seat position is not required, the slide rail assembly can also be omitted.

[0071] The aforementioned slide rail assembly includes a left slide rail assembly 60a and a right slide rail assembly 60b.

[0072] The left and right ends of the front tube 20 are fixedly connected to the front sides of the left seat side panel 10a and the right seat side panel 10b, respectively, and cannot be rotated. The left and right ends of the rear tube 30 are hinged to the rear sides of the left seat side panel 10a and the right seat side panel 10b, respectively, and can be rotated.

[0073] Here, the fixed connection between the front tube 20 and the two seat cushion side plates can be understood as the front tube 20 not being able to move relative to the two seat cushion side plates. This also covers the following embodiments: the front tube 20 is directly fixedly connected to the seat cushion side plate 10a (first connection), for example, by welding, and the front tube 20 is generally connected to the seat cushion side plate 10b, for example, non-rotatable but axially movable, wherein, due to the existence of the first connection, the front tube 20 will not move axially relative to the seat cushion side plate 10b. For example, the front tube 20 is inserted into the mounting hole of the seat cushion side plate 10a and welded, and the front tube 20 is inserted into the mounting hole of the seat cushion side plate 10b without welding. Preferably, the front tube 20 is directly fixedly connected to each of the two seat cushion side plates. The same applies to the fixed connection relationship between the synchronizing rod 50 and the two front lower connecting rods, and to the fixed connection relationship between the rear tube 30 and the two rear connecting rods.

[0074] The left front lower link 40a is hinged to the left front bracket 61a in the left slide rail assembly 60a and can rotate. The right front lower link 40b is hinged to the right front bracket 61b in the right slide rail assembly 60b and can rotate. Of course, if the slide rail assembly is not needed, the left front lower link 40a and the right front lower link 40b can be directly hinged to the floor or the vehicle body floor.

[0075] The left and right ends of the synchronizing rod 50 are fixedly connected to the left front lower link 40a and the right front lower link 40b respectively, and cannot be rotated. This rigid connection between the left and right front lower links allows motion to be transmitted through the synchronizing rod. The connection between the rear tube and the left and right rear links is similar.

[0076] The upper end of the left front upper link 70a is hinged to the front side of the left seat cushion side panel 10a and can rotate. The lower end of the left front upper link 70a is hinged to the left front lower link 40a and can rotate. The upper end of the right front upper link 70b is hinged to the front side of the right seat cushion side panel 10b and can rotate. The lower end of the right front upper link 70b is hinged to the right front lower link 40b and can rotate.

[0077] The upper ends of the left rear link 80a and the right rear link 80b are fixedly connected to the left and right ends of the rear tube 30, respectively, and cannot be rotated. The lower ends of the left rear link 80a and the right rear link 80b are hinged to the left rear bracket 62a in the left slide rail assembly 60a and the right rear bracket 62b in the right slide rail assembly 60b, respectively, and can be rotated.

[0078] When using the zero-gravity motor assembly 90 to adjust the seat cushion using zero gravity, the zero-gravity motor assembly 90 can be located inside the right slide rail assembly 60b, near the right slide rail assembly 60b. The zero-gravity motor assembly 90 includes a zero-gravity motor 91, a zero-gravity lead screw 92 driven by the zero-gravity motor 91, and a zero-gravity threaded tube 93 driven by the zero-gravity lead screw 92 to perform telescopic movement. The zero-gravity lead screw 92 and the zero-gravity threaded tube 93 constitute a lead screw and nut mechanism. The zero-gravity motor 91 is located slightly above the inside of the right slide rail assembly 60b and is hinged to the right front lower connecting rod 40b. The end of the zero-gravity threaded tube 93 is hinged to the right rear connecting rod 80b.

[0079] The high-adjustment motor assembly 100 is located inside the left slide rail assembly 60a, near the left slide rail assembly 60a. It includes a high-adjustment motor bracket 101, a high-adjustment motor 102, a high-adjustment lead screw 103 driven by the high-adjustment motor 102, and a high-adjustment threaded tube 104 driven by the high-adjustment lead screw 103 for telescopic movement. The high-adjustment motor bracket 101 is fixedly connected to the front tube 20 and cannot rotate. The high-adjustment motor 102 is hinged to the high-adjustment motor bracket 101 and can rotate. The end of the high-adjustment threaded tube 104 is hinged to the left rear connecting rod 80a.

[0080] It goes without saying that the zero-gravity motor assembly 90 and the high-adjustment motor assembly 100 can be interchanged, with the zero-gravity motor assembly 90 located on the left and the high-adjustment motor assembly 100 located on the right.

[0081] See Figure 20 and Figure 21 When the seat cushion starts to adjust from the initial position (if the seat cushion is not in the initial position at this time, it can be returned to the initial position first) to the zero gravity position, the zero gravity motor 91 and the zero gravity lead screw 92 drive the zero gravity threaded tube 93 to move. The movement of the zero gravity threaded tube 93 pulls the right rear connecting rod 80b to move around the hinge point between it and the right rear bracket 62b in the right slide rail assembly 60b. At the same time as the right rear connecting rod 80b moves, it pulls the rear tube 30 to move.

[0082] When the zero-gravity motor 91 and the zero-gravity lead screw 92 drive the zero-gravity threaded tube 93 to move, the zero-gravity motor 91 drives the right front lower connecting rod 40b to move around the hinge point between it and the right front bracket 61b in the right slide rail assembly 60b. The movement of the right front lower connecting rod 40b drives the movement of the right front upper connecting rod 70b. At the same time, the movement of the rear tube 30 drives the left rear connecting rod 80a to move around the hinge point between it and the left rear bracket 62a in the left slide rail assembly 60a. The movement of the left rear connecting rod 80a drives the front tube 20 to move through the high-adjustment motor assembly 100 (at this time, the high-adjustment motor assembly 100 is not working and is equivalent to a connecting rod) – synchronous with the movement of the right front upper connecting rod 70b, thereby realizing the adjustment of the front end of the seat cushion, so that the seat cushion moves from the initial position to the zero-gravity position.

[0083] The following embodiments illustrate different positions of the hinge point E between the right rear link 80b and the right rear bracket 62b in the right slide rail assembly 60b, relative to the hinge point F between the end of the zero-gravity threaded tube 93 in the zero-gravity motor assembly 90 and the right rear link 80b.

[0084] Example 1

[0085] See Figures 4 to 7 This embodiment addresses the case where the hinge point E between the right rear link 80b and the right rear bracket 62b in the right slide rail assembly 60b is located above the hinge point F between the end of the zero gravity threaded tube 93 in the zero gravity motor assembly 90 and the right rear link 80b.

[0086] In this embodiment, when the seat height needs to be adjusted, the high-adjustment motor assembly 100 is activated (at this time, the zero-gravity motor assembly 90 is not working; it acts like a connecting rod that connects the right front lower connecting rod and the right rear connecting rod). The high-adjustment motor 102 drives the high-adjustment screw 103 to rotate, and the high-adjustment screw 103 drives the high-adjustment threaded tube 104 to move. The high-adjustment motor 102 and the high-adjustment threaded tube 104 simultaneously drive the movement of the front tube 20 and the left rear connecting rod 80a. The front tube 20 drives the left front upper connecting rod 70a and the right front upper connecting rod 70b to move through the left seat side plate 10a and the right seat side plate 10b. The movement of the left front upper connecting rod 70a and the right front upper connecting rod 70b in turn drives the left front lower connecting rod 40a and the right front lower connecting rod 40b to move. In addition, the left rear connecting rod 80a drives the rear tube 30 to move, and the rear tube 30 synchronously drives the right rear connecting rod 80b to move, thereby realizing the adjustment of the seat height.

[0087] During seat height adjustment, the angle changes of the left rear linkage 80a and right rear linkage 80b drive the left front lower linkage 40a and right front lower linkage 40b in tandem, enabling simultaneous height adjustment of the front and rear ends of the seat cushion while maintaining a relatively constant seat angle. At this time, because the right front lower linkage 40b and right rear linkage 80b are linked, the zero-gravity motor assembly is not pulled. In other words, in this embodiment, the linkages of the five-bar linkage are linked during seat height adjustment, unlike the linkages of a four-bar linkage. This allows for simultaneous height adjustment of the front and rear ends of the seat cushion, essentially maintaining a constant seat angle. At this time, because the left front lower link 40a and the right front lower link 40b will rotate counterclockwise synchronously (the hinge point E between the right rear link 80b and the right rear bracket 62b in the right slide rail assembly 60b is located above the end of the zero gravity threaded tube 93 in the zero gravity motor assembly 90 and the hinge point F of the right rear link 80b), the angle α value increases, thus compensating for the first type of four-bar linkage (such as...). Figure 7 As shown, AD=BC, CD>AB) and in the second type of four-bar linkage (such as Figure 7 As shown, AD < BC) decreases in angle α during the movement, at least partially offsetting the decrease in angle α, so that the seat angle remains basically unchanged.

[0088] When the seat begins to adjust from the initial position to the zero-gravity position, the zero-gravity motor 91 and the zero-gravity lead screw 92 drive the zero-gravity threaded tube 93 to move. The movement of the zero-gravity threaded tube 93 pulls the right rear connecting rod 80b to move around the hinge point between it and the right rear bracket 62b in the right slide rail assembly 60b. At the same time, the movement of the right rear connecting rod 80b pulls the rear tube 30 to move.

[0089] When the zero-gravity motor 91 and the zero-gravity lead screw 92 drive the zero-gravity threaded tube 93 to move, the zero-gravity motor 91 drives the right front lower connecting rod 40b to move around the hinge point between it and the right front bracket 61b in the right slide rail assembly 60b. The movement of the right front lower connecting rod 40b drives the movement of the right front upper connecting rod 70b. At the same time, the movement of the rear tube 30 drives the left rear connecting rod 80a to move around the hinge point between it and the left rear bracket 62a in the left slide rail assembly 60a. The movement of the left rear connecting rod 80a drives the front tube 20 to move through the high-adjustment motor assembly 100 (at this time, the high-adjustment motor assembly 100 is not working and is equivalent to a connecting rod) – synchronous with the movement of the right front upper connecting rod 70b, thereby realizing the adjustment of the front end of the seat cushion, so that the seat cushion moves from the initial position to the zero-gravity position.

[0090] Example 2

[0091] See Figures 8 to 9Since the zero-gravity motor assembly 90 does not operate when the seat height is adjusted according to Embodiment 1, a connecting rod 90a can be used to replace the zero-gravity motor assembly 90 in Embodiment 1, allowing this embodiment to be used in seats without a zero-gravity function. One end of the connecting rod 90a is hinged to the right front lower connecting rod 40b, and the other end of the connecting rod 90a is hinged to the right rear connecting rod 80b. The seat height adjustment method of this embodiment can be found in Embodiment 1.

[0092] Example 3

[0093] See Figures 10 to 13 This embodiment addresses the situation where the hinge point E between the right rear link 80b and the right rear bracket 62b in the right slide rail assembly 60b, and the hinge point F between the end of the zero gravity threaded tube 93 in the zero gravity motor assembly 90 and the right rear link 80b are coaxial in the Y direction.

[0094] The seat height adjustment method in this embodiment can be found in Embodiment 1, wherein the angle α value can remain essentially unchanged when adjusting the seat height. This applies to the third four-bar linkage method (such as...). Figure 13 As shown, AD=BC, CD=AB, and the angle α of the four-bar linkage remains unchanged during the motion (the seat angle remains unchanged).

[0095] When the seat begins to adjust from the initial position to the zero-gravity position, the zero-gravity threaded tube 93 is driven to move by the zero-gravity motor 91 and the zero-gravity lead screw 92.

[0096] When the zero-gravity motor 91 and the zero-gravity lead screw 92 drive the zero-gravity threaded tube 93 to move, the zero-gravity motor 91 drives the right front lower link 40b to move around the hinge point between it and the right front bracket 61b in the right slide rail assembly 60b. The movement of the right front lower link 40b drives the movement of the right front upper link 70b. At the same time, through the synchronizing rod, the left front lower link moves synchronously with the right front lower link, and the left front upper link moves synchronously with the right front upper link, realizing the adjustment of the front end of the seat cushion, thereby moving the seat cushion from the initial position to the zero-gravity position.

[0097] Example 4

[0098] See Figures 14 to 17 This embodiment addresses the case where the hinge point E between the right rear link 80b and the right rear bracket 62b in the right slide rail assembly 60b is located below the hinge point F between the end of the zero gravity threaded tube 93 in the zero gravity motor assembly 90 and the right rear link 80b.

[0099] The seat height adjustment method in this embodiment is basically the same as in Embodiment 1. When adjusting the seat height, the left front lower linkage 40a and the right front lower linkage 40b rotate clockwise (the hinge point E between the right rear linkage 80b and the right rear bracket 62b in the right slide rail assembly 60b is located below the hinge point F between the end of the zero-gravity threaded tube 93 in the zero-gravity motor assembly 90 and the right rear linkage 80b), causing the α value to decrease. This can compensate for the lower value in the fourth four-bar linkage (such as...). Figure 17 As shown, AD=BC, CD<AB) and in the fifth type of four-bar linkage (such as Figure 17 As shown, when AD > BC, the increase in angle α during the movement at least partially offsets the increase in angle α, so that the seat angle remains basically unchanged.

[0100] When the seat begins to adjust from the initial position to the zero-gravity position, the zero-gravity motor 91 and the zero-gravity lead screw 92 drive the zero-gravity threaded tube 93 to move. The movement of the zero-gravity threaded tube 93 pulls the right rear link 80b to move around its hinge point with the right rear bracket 62b in the right slide rail assembly 60b. The movement of the right rear link 80b pulls the rear tube 30 to move.

[0101] When the zero-gravity motor 91 and the zero-gravity lead screw 92 drive the zero-gravity threaded tube 93 to move, the zero-gravity motor 91 drives the right front lower connecting rod 40b to move around the hinge point between it and the right front bracket 61b in the right slide rail assembly 60b. The movement of the right front lower connecting rod 40b drives the movement of the right front upper connecting rod 70b. At the same time, the movement of the rear tube 30 drives the left rear connecting rod 80a to move around the hinge point between it and the left rear bracket 62a in the left slide rail assembly 60a. The movement of the left rear connecting rod 80a drives the front tube 20 to move through the high-adjustment motor assembly 100 (at this time, the high-adjustment motor assembly 100 is not working and is equivalent to a connecting rod) – synchronous with the movement of the right front upper connecting rod 70b, thereby realizing the adjustment of the front end of the seat cushion, so that the seat cushion moves from the initial position to the zero-gravity position.

[0102] Example 5

[0103] See Figures 18 to 19 Since the zero-gravity motor assembly 90 does not operate when the seat cushion is height adjusted in Embodiment 4, a connecting rod 90a can be used to replace the zero-gravity motor assembly 90 in Embodiment 4, and this embodiment can be used in seats without zero-gravity function. One end of the connecting rod 90a is hinged to the right front lower connecting rod 40b, and the other end is hinged to the right rear connecting rod 80b.

[0104] It should be noted that the terminology used herein is for illustrative purposes only and is not intended to limit the disclosure. The singular forms “a” and “the one” as used herein should include the plural forms unless the context explicitly states otherwise. It is understood that the terms “comprising” and “including,” and other similar terms, when used in the application documents, specifically describe the presence of the stated operation, element, and / or component, without excluding the presence or addition of one or more other operations, elements, components, and / or combinations thereof. The term “and / or” as used herein includes all arbitrary combinations of one or more of the associated listed items. In the description of the drawings, similar reference numerals always denote similar elements.

[0105] The thickness of the elements in the accompanying drawings may be exaggerated for clarity. It is also understood that if an element is described as being on, coupled to, or connected to another element, then the element may be directly formed on, coupled to, or connected to the other element, or there may be one or more intermediate elements between them. Conversely, if the expressions "directly on," "directly coupled to," and "directly connected to" are used herein, it indicates that there is no intermediate element. Other terms used to describe relationships between elements should be interpreted similarly, such as "between" and "directly between," "attached" and "directly attached," "adjacent" and "directly adjacent," etc.

[0106] It is understood that although the terms "first," "second," etc., may be used herein to describe different elements, these elements should not be limited by these terms. These terms are merely used to distinguish one element from another. Therefore, a first element may be referred to as a second element without departing from the teachings of the inventive concept.

[0107] It can also be considered that all the exemplary embodiments disclosed herein can be arbitrarily combined with each other.

[0108] Finally, it should be noted that the above embodiments are merely for understanding the present invention and do not constitute a limitation on the scope of protection of the present invention. Those skilled in the art can make modifications based on the above embodiments, and these modifications do not depart from the scope of protection of the present invention.

Claims

1. A seat cushion adjustment mechanism, the seat cushion adjustment mechanism comprising: Left seat cushion side panel and right seat cushion side panel; A front tube, the left end of which is fixedly connected to the front side of the left seat cushion side plate, and the right end of which is fixedly connected to the front side of the right seat cushion side plate. A rear tube, the left end of which is hinged to the rear side of the left seat cushion side plate, and the right end of which is hinged to the rear side of the right seat cushion side plate. A left rear connecting rod and a right rear connecting rod, wherein the upper end of the left rear connecting rod is fixedly connected to the left end of the rear tube, and the upper end of the right rear connecting rod is fixedly connected to the right end of the rear tube; The upper left front link and the upper right front link are provided. The upper end of the upper left front link is hinged to the front side of the left seat cushion side plate, and the upper end of the upper right front link is hinged to the front side of the right seat cushion side plate. The seat cushion adjustment mechanism is characterized in that it further includes: Left front lower linkage, right front lower linkage, a synchronizing rod and a high-speed motor assembly; The lower end of the left front upper link is hinged to the left front lower link, and the lower end of the right front upper link is hinged to the right front lower link. The left end of the synchronizing rod is fixedly connected to the left front lower connecting rod, and the right end of the synchronizing rod is fixedly connected to the right front lower connecting rod. One end of the high-adjustment motor assembly is hinged to the front tube, and the other end of the high-adjustment motor assembly is hinged to the left rear connecting rod. The seat adjustment mechanism also includes a structural component that hinges the right rear link to the right front lower link. The structural component is either a zero-gravity motor assembly or a link. The high-adjustment motor assembly is configured to drive the left rear link, right rear link, left front lower link, right front lower link, left front upper link, right front upper link, left seat cushion side plate, and right seat cushion side plate to move when the seat cushion height is adjusted, so as to realize the linkage of each link of the five-bar linkage and ensure that the seat cushion angle does not change passively during the seat height adjustment process. The structural component is a zero-gravity motor assembly. One end of the zero-gravity motor assembly is hinged to the right front lower link, and the other end is hinged to the right rear link. The zero-gravity motor assembly is configured to drive the seat cushion to a zero-gravity position during zero-gravity adjustment. Furthermore, during seat cushion height adjustment, the left and right rear links rotate. The rotation of the right rear link drives the right front lower link to rotate via the zero-gravity motor assembly, and the rotation of the right front lower link drives the left front lower link to rotate via a synchronizing rod. Alternatively... The structural component is a connecting rod, one end of which is hinged to the right front lower connecting rod, and the other end of which is hinged to the right rear connecting rod. During seat height adjustment, the left rear connecting rod and the right rear connecting rod rotate. The rotation of the right rear connecting rod drives the right front lower connecting rod to rotate through the structural component, and the rotation of the right front lower connecting rod drives the left front lower connecting rod to rotate through a synchronizing rod.

2. The seat cushion adjustment mechanism as described in claim 1, characterized in that, The other end of the high-adjustment motor assembly is hinged to the left rear linkage.

3. The seat cushion adjustment mechanism as described in claim 1, characterized in that, One end of the structural component is hinged to the right front lower link, and the other end of the structural component is hinged to the right rear link.

4. The seat adjustment mechanism as described in any one of claims 1 to 3, characterized in that, The high-adjustment motor assembly includes: a high-adjustment motor, a high-adjustment lead screw driven by the high-adjustment motor, and a high-adjustment threaded tube driven by the high-adjustment lead screw; one end of the high-adjustment motor assembly is hinged to the front tube, and the other end of the high-adjustment threaded tube is hinged to the left rear connecting rod; when adjusting the seat height, the high-adjustment motor drives the high-adjustment threaded tube to extend and retract via the high-adjustment lead screw.

5. The seat cushion adjustment mechanism as described in claim 4, characterized in that, The high-tuning motor assembly also includes a high-tuning motor bracket, which is fixedly connected to the front tube, and the high-tuning motor is hinged to the high-tuning motor bracket.

6. The seat adjustment mechanism as described in any one of claims 1 to 3, characterized in that, The left front lower link and the right front lower link, as well as the left rear link and the right rear link, are respectively hinged to the slide rail assembly or the floor.

7. The seat adjustment mechanism as described in any one of claims 1 to 3, characterized in that, The seat cushion adjustment mechanism also includes: A slide rail assembly, the slide rail assembly including a left slide rail assembly and a right slide rail assembly; The left front lower link is hinged to the front end of the upper left slide rail in the left slide rail assembly, and the right front lower link is hinged to the front end of the upper right slide rail in the right slide rail assembly; the lower end of the left rear link is hinged to the rear side of the upper left slide rail in the left slide rail assembly, and the lower end of the right rear link is hinged to the rear side of the upper right slide rail in the right slide rail assembly.

8. The seat cushion adjustment mechanism as described in claim 1, characterized in that, The zero-gravity motor assembly includes: a zero-gravity motor, a zero-gravity lead screw driven by the zero-gravity motor, and a zero-gravity threaded tube driven by the zero-gravity lead screw; the zero-gravity motor is hinged to the right front lower connecting rod, and the end of the zero-gravity threaded tube is hinged to the right rear connecting rod; when adjusting the seat cushion to zero gravity, the zero-gravity motor drives the zero-gravity threaded tube to extend and retract through the zero-gravity lead screw, thus driving the seat cushion to adjust to the zero-gravity position.

9. The seat cushion adjustment mechanism as described in claim 1, characterized in that, The hinge point between the lower end of the right rear link and the slide rail assembly or the floor is located above the hinge point between the other end of the zero-gravity motor assembly and the right rear link; or The hinge point between the lower end of the right rear link and the slide rail assembly or the floor is located below the hinge point between the other end of the zero-gravity motor assembly and the right rear link; or The lower end of the right rear link and the hinge point with the slide rail assembly or the floor are coaxial in the Y direction with the other end of the zero gravity motor assembly and the hinge point with the right rear link.

10. The seat cushion adjustment mechanism as described in claim 8, characterized in that, The seat cushion adjustment mechanism also includes a slide rail assembly, which comprises a left slide rail assembly and a right slide rail assembly, wherein... The rear hinge point of the right rear connecting rod and the upper right slide rail in the right slide rail assembly is located above the hinge point of the end of the zero-gravity threaded tube and the right rear connecting rod; or The rear hinge point of the right rear connecting rod and the upper right slide rail in the right slide rail assembly is located below the hinge point of the end of the zero-gravity threaded tube and the right rear connecting rod; or The rear hinge point of the right rear connecting rod and the upper right slide rail in the right slide rail assembly, and the end of the zero-gravity threaded tube and the hinge point of the right rear connecting rod are coaxial in the Y direction.

11. The seat adjustment mechanism as described in any one of claims 8 to 10, characterized in that, The seat adjustment mechanism also includes a slide rail assembly, which includes a left slide rail assembly and a right slide rail assembly. The zero-gravity motor assembly is located inside the right slide rail assembly and adjacent to it, and the zero-gravity motor is located slightly above the inside of the right slide rail assembly.

12. The seat adjustment mechanism as described in any one of claims 1 to 3, characterized in that, The seat adjustment mechanism also includes a slide rail assembly, which includes a left slide rail assembly and a right slide rail assembly, wherein the high-adjustment motor assembly is located inside the left slide rail assembly and adjacent to the left slide rail assembly.

13. The seat adjustment mechanism as described in any one of claims 1 to 3, characterized in that, The front tube is directly and fixedly connected to the left and right seat cushion side panels, the rear tube is directly and fixedly connected to the left and right rear connecting rods, and the synchronizing rod is directly and fixedly connected to the left and right front lower connecting rods.

14. A seat comprising a cushion adjustment mechanism according to any one of claims 1 to 13.

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