WO2024067769A1

WO2024067769A1 - Zero-gravity vehicle seat and seat framework thereof

Info

Publication number: WO2024067769A1
Application number: PCT/CN2023/122426
Authority: WO
Inventors: 巴拉斯彼拉达
Original assignee: 博泽科堡汽车零件欧洲两合公司; 巴拉斯彼拉达
Priority date: 2022-09-30
Filing date: 2023-09-28
Publication date: 2024-04-04
Also published as: CN218892464U

Abstract

Disclosed are a zero-gravity vehicle seat and a seat framework (1) thereof. The seat framework comprises: a base (10) to be fixed to a vehicle floor; a seat frame (20) positioned above the base; front connection rods (30), each having one end connected to the seat frame in a pivoting manner; and an inclination adjustment mechanism, wherein the inclination adjustment mechanism comprises inclination-adjustment connection rods (50) and an inclination driving mechanism for driving the inclination adjustment mechanism to rotate; the other end of each front connection rod is hinged to one end of each inclination-adjustment connection rod; and the other end of each inclination-adjustment connection rod is connected to the base in a pivoting manner. The seat framework further comprises a front synchronous rod (70), two ends of which are respectively fixedly connected to points where the inclination-adjustment connection rods on the left side and the right side of the seat framework are connected to the base in a pivoting manner. The zero-gravity vehicle seat comprises the seat framework described above. The seat framework enables the zero-gravity seat to have more adjustability.

Description

Zero gravity vehicle seat and seat frame thereof

Technical Field

The utility model relates to the field of vehicles. Specifically, in a first aspect, the utility model relates to a seat frame for a zero-gravity vehicle seat. In a second aspect, the utility model relates to a zero-gravity vehicle seat comprising the seat frame.

Background technique

Conventional vehicle seats are generally adjusted using a four-bar linkage (one on each side of the seat), which consists of a front link, a seat frame, a rear link and a base, wherein there are two pivot points at the front and rear, the front link connects the two front pivot points, the rear link connects the two rear pivot points, and the lower pivot point is fixed to the base, and the frame of the seat frame is connected to the upper pivot point.

This four-bar linkage can achieve height adjustment of the vehicle seat and can also achieve integrated tilt adjustment, in which the seat frame can be tilted upward to a certain angle around a pivot point. However, the vehicle seat cannot achieve a full seat tilt function and cannot ensure the comfort of the passengers.

In recent years, zero-gravity seats have been increasingly used in vehicles because of their ability to maximize passenger comfort. Current zero-gravity seats usually use a five-link mechanism to adjust the seat's inclination and height to meet the requirements of zero-gravity seats for adjusting the seat posture of passengers.

CN113147532A discloses a seat frame adjustment structure for a zero-gravity vehicle seat, including a base, a seat frame, a front link, a rear link and a tilt adjustment link. Compared with the traditional four-link mechanism, it adds a tilt adjustment link to form a five-link mechanism to provide seat height adjustment and tilt adjustment, wherein one end of the front link is pivotally connected to the seat frame, and the other end is pivotally connected to one end of the tilt adjustment link, and the other end of the tilt adjustment link is pivotally connected to the base. The height adjustment and tilt adjustment are controlled by two rotation drive mechanisms, and only one is rotated at a time. One of the rotation drive mechanisms is in a self-locking state to switch between height adjustment and inclination adjustment. Each rotation drive mechanism includes an arc-shaped rack fixed to the base and a drive gear meshing therewith, and the drive gear is arranged on the front and rear connecting rods. When height adjustment is performed, the rotation drive mechanism arranged on the rear connecting rod is operated to drive the rear connecting rod to rotate (at this time, the inclination adjustment connecting rod is locked, so the rear connecting rod, the seat frame, the front connecting rod and the base constitute a four-bar mechanism), thereby adjusting the seat height. When inclination adjustment is performed, the rotation drive mechanism arranged on the front connecting rod is operated to drive the inclination adjustment connecting rod to rotate around its pivot connection point with the base so that the seat frame rotates around the rear upper pivot point (at this time, the rear connecting rod is locked, so the seat frame cannot rotate around the rear lower pivot point), thereby adjusting the seat inclination.

CN214647735U also discloses a similar seat frame adjustment structure for a zero-gravity vehicle seat, including a base, a seat frame, a front link, a rear link and a tilt adjustment link. Compared with the traditional four-link mechanism, it also adds a tilt adjustment link to form a five-link mechanism to provide height adjustment and tilt adjustment of the seat, wherein one end of the front link is pivotally connected to the seat frame, and the other end is pivotally connected to one end of the tilt adjustment link, and the other end of the tilt adjustment link is pivotally connected to the base. The height adjustment and tilt adjustment are also controlled by two rotating drive mechanisms, each of which includes an arc-shaped rack and a driving gear meshed therewith, wherein for height adjustment, the arc-shaped rack is arranged on the rear link, and the driving gear is arranged on the frame of the seat frame, and for tilt adjustment, the arc-shaped rack is arranged on the tilt adjustment link, and the driving gear is arranged on the base. When adjusting the height, the rotary drive mechanism arranged at the rear of the seat works to drive the rear link to rotate (the tilt adjustment link is locked at this time, so the rear link, the seat frame, the link or the front link and the base form a four-bar mechanism), thereby adjusting the seat height. When adjusting the tilt angle, the rotary drive mechanism arranged at the front of the seat works to drive the tilt adjustment link to rotate around its pivot connection point with the base, so that the seat frame rotates around the rear lower pivot point (the rear link is locked at this time, so the seat frame cannot rotate around the rear upper pivot point), thereby adjusting the seat tilt angle.

In order to synchronize the movement of both sides of the seat, synchronization rods are respectively provided at the front and rear of the seat, wherein the two ends of the front synchronization rod are respectively fixedly connected to the pivot connection point of the front link and the tilt adjustment link, and the two ends of the rear synchronization rod are respectively fixedly connected to the pivot connection point of the rear link and the seat frame. At the contact point.

There remains a need for improved seat frame adjustment arrangements for zero gravity vehicle seats.

Summary of the invention

The purpose of the present utility model is to improve the existing zero-gravity vehicle seats. On the one hand, the present utility model proposes a seat frame for a vehicle zero-gravity seat. The seat frame includes a base to be fixed to the vehicle floor, a seat frame located above the base, a front connecting rod pivotally connected to the seat frame at one end, and a reclining mechanism, the reclining mechanism including a reclining connecting rod and a reclining driving mechanism for driving the reclining mechanism to rotate, the other end of the front connecting rod is hinged to one end of the reclining connecting rod, and the other end of the reclining connecting rod is pivotally connected to the base. The seat frame also includes a front synchronization rod to synchronize the reclining movement of the two sides of the seat. According to the present utility model, the two ends of the front synchronization rod are respectively fixedly connected to the pivotal connection points of the reclining connecting rod and the base on the left and right sides of the seat frame. With this arrangement, the front synchronization rod is closer to the base compared with the existing structure.

According to an embodiment, the inclination driving mechanism includes a driving motor, a driving gear connected to the motor output shaft and a rack meshing therewith. The rack is arranged on the base, and the motor and the driving gear are arranged on the inclination adjusting connecting rod.

According to another embodiment, the inclination drive mechanism includes a spindle motor and a lead screw meshed with the output end of the spindle motor. The spindle motor is arranged on the inclination adjustment link, and one end of the lead screw is arranged on the base. The output end of the spindle motor rotates to cause it to move along the lead screw, driving the inclination adjustment link to rotate around its pivot point with the base. With this arrangement, it is no longer necessary to provide a drive gear and a rack.

According to an embodiment, the incline adjustment link can be switched between a locked state and an activated state. In the locked state, the incline adjustment link is in a horizontal position and is roughly in a straight line with the base. In the activated state, the incline adjustment link can rotate around its pivot connection point with the base to adjust the incline.

According to an embodiment, the seat frame further comprises a height adjustment mechanism, which comprises a height adjustment link and a height drive mechanism, wherein one end of the height adjustment link is pivotally connected to the rear side of the base, and the other end is pivotally connected to the rear side of the seat frame, and the height drive mechanism drives the height adjustment link to rotate. With this arrangement, the height adjustment of the seat is achieved.

According to an embodiment, the height drive mechanism includes a drive motor, a drive gear connected to the motor output shaft and a rack meshing therewith. The rack is arranged on the height adjustment link, and the motor and the drive gear are arranged on the frame of the seat frame, or the rack is arranged on the base, and the motor and the drive gear are arranged on the height adjustment link. With the former arrangement, the seat frame is allowed to rotate around the pivot connection point between the height adjustment link and the base (i.e., the rear lower pivot point) when the inclination angle is adjusted. With the latter arrangement, the seat frame is allowed to rotate around the pivot connection point between the height adjustment link and the seat frame (i.e., the rear upper pivot point) when the inclination angle is adjusted.

According to another embodiment, the height drive mechanism includes a spindle motor and a lead screw meshed with the output end of the spindle motor. The spindle motor is arranged on the height adjustment link, and one end of the lead screw is arranged on the base, or the spindle motor is arranged on the front side of the frame of the seat frame, and one end of the lead screw is arranged on the rear side of the base. The output end of the spindle motor rotates to cause it to move along the lead screw, driving the height adjustment link to rotate around its pivot connection point with the base. With this arrangement, it is no longer necessary to provide a drive gear and a rack.

Preferably, the left and right sides of the seat frame are provided with an inclination adjustment mechanism and/or a height adjustment mechanism. With this arrangement, the forces borne by the adjustment mechanism can be dispersed, the stability of the adjustment mechanism can be improved, and a smaller drive motor or spindle motor can be selected, thereby reducing the cost of the seat.

According to an embodiment, the base is a slide rail structure, and the seat frame can slide along the slide rail along with the inclination adjustment mechanism and the height adjustment mechanism to achieve the front and rear adjustment function of the seat.

In another aspect, the present invention provides a zero-gravity vehicle seat, which comprises the above-mentioned seat frame.

The vehicle seat of the present invention also uses an additional reclining link, which can form a five-link mechanism (one on each side of the seat) together with the front link, the seat frame, the rear link (i.e., the height adjustment link) and the base, wherein there are two pivot points at the front and rear, the front link and the reclining link are each connected to a front pivot point, the rear link is connected to two rear pivot points, and the lower pivot point is fixed to the base, and the frame of the seat frame is connected to the upper pivot point. In addition, the front link and the reclining link are hinged to each other. In the locked state, since the reclining link is locked and roughly in a straight line with the base, the five-link mechanism becomes a four-link mechanism, thereby enabling height adjustment, and in the activated state, since the reclining link rotates, the seat frame can be tilted, thereby enabling reclining adjustment.

It is also conceivable that no height adjustment link is provided so that the seat frame is directly pivotally connected to the base at the rear side.

Compared with the current five-link mechanism, the structure of the utility model is improved, and the zero-gravity seat vehicle can have more adjustability.

BRIEF DESCRIPTION OF THE DRAWINGS

Some embodiments of the present invention will be explained in more detail in the accompanying drawings, in which:

1A is a perspective view of a vehicle seat frame of the present invention, wherein the reclining link is in an activated upwardly tilted state;

FIG. 1B is a perspective view of the vehicle seat frame of FIG. 1A with some components removed for clarity;

2A and 2B are perspective views of a vehicle seat frame using a single motor and a dual motor reclining mechanism according to a first embodiment of the present invention, respectively, wherein the reclining link is in a horizontally locked state;

2C and 2D are perspective views of the vehicle seat frame of FIGS. 2A and 2B , respectively, with the reclining link in an activated upward tilt state;

3A and 3B are perspective views of a vehicle seat frame of a second embodiment of the utility model using a single motor and a dual motor reclining mechanism, wherein the reclining connecting rod is in Horizontal lock state;

FIG3C is a partially enlarged perspective view of FIG3A;

FIG3D is a perspective view of FIG3A from another angle;

4A and 4B are perspective views of a vehicle seat frame using a single motor and a dual motor reclining mechanism according to a third embodiment of the present invention, respectively, wherein the reclining link is in a horizontally locked state;

FIG4C is a partially enlarged perspective view of FIG4A;

FIG4D is a perspective view of FIG4A from another angle;

5A and 5B are perspective views of a vehicle seat frame using a single motor and a dual motor reclining mechanism according to a fourth embodiment of the present invention, respectively, wherein the reclining link is in a horizontally locked state;

FIG5C is a partially enlarged perspective view of FIG5A;

FIG5D is a perspective view of FIG5A from another angle;

6A is a perspective view of a vehicle seat frame according to a fifth embodiment of the present utility model, wherein the tilt adjustment link is in a horizontally locked state;

6B and 6C are respectively partial enlarged perspective views of FIG. 6A ;

FIG6D is a perspective view of FIG6A with the recliner link in an activated upward tilt state;

7A is a perspective view of a vehicle seat frame according to a sixth embodiment of the present utility model, wherein the tilt adjustment link is in a horizontally locked state;

7B and 7C are partial enlarged perspective views of FIG. 7A ;

FIG7D is a perspective view of FIG7A from another angle;

8A and 8B are perspective views of a vehicle seat frame of a seventh embodiment of the utility model using a single motor and a dual motor reclining mechanism, respectively, wherein the reclining link is in a horizontally locked state;

FIG8C is a partially enlarged perspective view of FIG8A;

FIG8D is a perspective view of FIG8A from another angle;

9A and 9B are perspective views of a vehicle seat frame of an eighth embodiment of the utility model using a single motor and a dual motor reclining mechanism, wherein the reclining link is in a horizontally locked state;

FIG9C is a partially enlarged perspective view of FIG9A;

FIG. 9D is a perspective view of FIG. 9A from another angle.

In the drawings, for the sake of clarity, the embodiments of the present invention are shown in a simplified manner. The drawings are not necessarily shown to scale. Similar reference numerals in the drawings represent similar components.

Detailed ways

The embodiments of the present invention are described below with reference to the accompanying drawings. For ease of description, directional terms are used below, which refer to the orientation of the vehicle seat when it is installed in the vehicle.

FIG1A and FIG1B illustrate the basic concept of the utility model. As shown in the figure, the seat frame 1 includes a base 10 to be fixed to the vehicle floor, a seat frame 20 located above the base 10, a front link 30 pivotally connected to the seat frame 20 at one end, a rear link 40 (i.e., a height adjustment link) and a tilt adjustment link 50, the other end of the front link 30 is hinged to one end of the tilt adjustment link 50, and the other end of the tilt adjustment link 50 is pivotally connected to the base 10, whereby the base 10, the seat frame 20, the front link 30, the rear link 40 and the tilt adjustment link 50 constitute a five-link mechanism (one on each side of the seat). In addition, the seat frame 1 also includes a rear crossbar 60 and a front synchronization rod 70 to synchronize the movement of the two sides of the seat. As shown in FIG1B, the two ends of the front synchronization rod 70 are respectively fixed to the two pivot connection points of the two tilt adjustment links 50 on the left and right sides of the seat frame 1 and the base 10, so that the tilt adjustment link 50 can rotate around the axis R0 extending through the two pivot connection points. The base 10 is a slide rail structure, so that the seat can also be adjusted forward and backward.

In order to perform height adjustment and inclination adjustment, the present invention envisions a variety of ways to drive the inclination adjustment link 50 and the height adjustment link 40 to rotate.

2A-2D show a first embodiment of the present invention. The seat frame 100 includes a base 110 to be fixed to the vehicle floor, a seat frame 120 located above the base 110, a front link 130, a rear link 140 (i.e., a height adjustment link), and a tilt adjustment link 150. The base 110, the seat frame 120, the front link 130, the rear link 140, and the tilt adjustment link 150 constitute a seat frame 100. The seat frame 100 also includes a rear crossbar 160 and a front synchronization bar 170 to synchronize the movements of the two sides of the seat. As shown in FIG2C , the two ends of the front synchronization bar 170 are respectively fixed to the two pivot connection points of the two inclination adjustment links 150 on the left and right sides of the seat frame 100 and the base 110, so that the inclination adjustment links 150 can rotate around the axis R10 extending through the two pivot connection points.

In this example, the tilt drive mechanism includes a drive motor 180, a drive gear (not shown) drivingly connected to the motor output shaft and a rack (not shown) meshed therewith, wherein the rack is arranged on the base 110, and the motor and the drive gear are arranged on the tilt adjustment link 150. The height drive mechanism includes a drive motor 191, a drive gear (not shown) drivingly connected to the motor output shaft and a rack (not shown) meshed therewith, wherein the rack is arranged on the height adjustment link 140, and the motor and the drive gear are arranged on the frame of the seat frame 110. When the tilt is adjusted (at this time, the height adjustment link 140 is locked), as the tilt adjustment link 150 rotates, the seat frame 110 rotates around an axis R11 extending through two pivot connection points (i.e., rear lower pivot points) where the two height adjustment links 140 are pivotally connected to the base 110. During height adjustment (at this time the incline adjustment link 150 is locked and in a horizontal position, as shown in FIGS. 2A-2B ), since the incline adjustment link 150 and the base 110 are roughly in a straight line, the five-bar linkage becomes a four-bar linkage, thereby enabling height adjustment.

2A and 2C show a seat frame 100 including a reclining mechanism using a single motor 180, and FIG. 2B and 2D show a seat frame 100 including a reclining mechanism using dual motors 180, wherein a motor 180 is disposed on each of the left and right sides of the seat to drive two reclining connecting rods 150. In the case of a single motor 180, the drive motor 180 and the drive motor 191 are disposed on both sides of the seat to facilitate load balancing.

3A-3D show a second embodiment of the present invention. The seat frame 200 includes a base 210 to be fixed to the vehicle floor, a seat frame 220 located above the base 210, a front link 230, a rear link 240 (i.e., a height adjustment link), and a tilt adjustment link 250. The base 210, the seat frame 220, the front link 230, the rear link 240, and the tilt adjustment link 250 constitute a five-link mechanism (one on each side of the seat). In addition, the seat frame 200 also includes a rear link 230, a rear link 240, and a tilt adjustment link 250. As shown in FIG3C , the two ends of the front synchronization rod 270 are respectively fixed to the two pivot connection points of the two inclination adjustment links 250 on the left and right sides of the seat frame 200 and the base 210, so that the inclination adjustment links 250 can rotate around the axis extending through the two pivot connection points (i.e., the axis of the synchronization rod 270).

In this example, the tilt drive mechanism includes a spindle motor 280 and a lead screw 290 meshed with the output end of the spindle motor 280. The spindle motor 280 is arranged on the tilt adjustment link 250, and one end of the lead screw 290 is arranged on the base 210. The output end of the spindle motor 280 rotates to cause it to move along the lead screw 290, driving the tilt adjustment link 250 to rotate around its pivot point with the base 210. The height drive mechanism includes a drive motor 291, a drive gear (not shown) connected to the motor output shaft and a rack (not shown) meshed therewith, wherein the rack is arranged on the height adjustment link 240, and the motor and the drive gear are arranged on the frame of the seat frame 210. When the tilt is adjusted (when the height adjustment link 240 is locked), as the tilt adjustment link 250 rotates, the seat frame 210 rotates around the axis R21 extending through the two pivot connection points (i.e., the rear lower pivot points) where the two height adjustment links 240 are pivotally connected to the base 210. When adjusting the height (at this time the incline adjustment link 250 is locked and in a horizontal position, as shown in FIGS. 3A-3B ), since the incline adjustment link 250 and the base 210 are roughly in a straight line, the five-bar linkage becomes a four-bar linkage, thereby enabling height adjustment.

FIG3A shows a seat frame 200 including a reclining mechanism using a single motor 280, and FIG3B shows a seat frame 200 including a reclining mechanism using dual motors 280, wherein a motor 280 is disposed on each of the left and right sides of the seat to drive two reclining connecting rods 250. In the case of a single motor 280, the spindle motor 280 and the drive motor 291 are disposed on both sides of the seat to facilitate load balancing.

4A-4D show a third embodiment of the present invention. The seat frame 300 includes a base 310 to be fixed to the vehicle floor, a seat frame 320 located above the base 310, a front link 330, a rear link 340 (i.e., a height adjustment link), and a tilt adjustment link 350. The base 310, the seat frame 320, the front link 330, the rear link 340, and the tilt adjustment link 350 constitute a seat frame 300. The seat frame 300 also includes a rear crossbar 360 and a front synchronization bar 370 to synchronize the movements of the two sides of the seat. As shown in FIG4C , the two ends of the front synchronization bar 370 are respectively fixed to the two pivotal connection points of the two inclination adjustment links 350 on the left and right sides of the seat frame 300 and the base 310, so that the inclination adjustment links 350 can rotate around the axis extending through the two pivotal connection points (i.e., the axis of the synchronization bar 370).

In this example, the inclination drive mechanism includes a drive motor 380, a drive gear (not shown) drivingly connected to the motor output shaft and a rack 390 meshing therewith, wherein the rack 390 is arranged on the base 310, and the motor and the drive gear are arranged on the inclination adjustment link 350. The height drive mechanism includes a spindle motor 391 and a lead screw 392 meshing with the output end of the spindle motor 391. The spindle motor 391 is arranged on the height adjustment link 340, and one end of the lead screw 392 is arranged on the base 310. The output end of the spindle motor 391 rotates, causing it to move along the lead screw 392, driving the height adjustment link 340 to rotate around its pivot connection point with the base 310. During the tilt adjustment (when the height adjustment link 340 is locked), as the tilt adjustment link 350 rotates, the seat frame 310 rotates around the axis R31 (i.e., the axis of the rear cross bar 360) extending through the two pivot connection points (i.e., the rear upper pivot points) where the two height adjustment links 340 are pivotally connected to the seat frame 320. During the height adjustment (when the tilt adjustment link 350 is locked and in a horizontal position, as shown in FIGS. 4A-4B), since the tilt adjustment link 350 and the base 310 are substantially in a straight line, the five-bar linkage becomes a four-bar linkage, thereby enabling height adjustment.

FIG4A shows a seat frame 300 including a reclining mechanism using a single motor 380, and FIG4B shows a seat frame 300 including a reclining mechanism using dual motors 380, wherein a motor 380 is disposed on each of the left and right sides of the seat to drive two reclining connecting rods 350. In the case of a single motor 380, the drive motor 380 and the spindle motor 391 are disposed on both sides of the seat to facilitate load balancing.

5A-5D show a fourth embodiment of the present invention. The seat frame 400 includes a base 410 to be fixed to the vehicle floor, a seat frame 420 located above the base 410, a front link 430, a rear link 440 (i.e., a height adjustment link), and an inclination adjustment link 450. Base 410, the seat frame 420, the front link 430, the rear link 440 and the tilt adjustment link 450 constitute a five-link mechanism (one on each side of the seat). In addition, the seat frame 400 also includes a rear crossbar 460 and a front synchronization rod 470 to synchronize the movements of the two sides of the seat. As shown in FIG4C, the two ends of the front synchronization rod 470 are respectively fixed to the two pivot connection points of the two tilt adjustment links 450 on the left and right sides of the seat frame 400 and the base 410, so that the tilt adjustment link 450 can rotate around the axis extending through the two pivot connection points (i.e., the axis of the synchronization rod 470).

In this example, the tilt drive mechanism includes a spindle motor 480 and a lead screw 490 engaged with the output end of the spindle motor 480. The spindle motor 480 is arranged on the tilt adjustment link 450, and one end of the lead screw 490 is arranged on the base 410. The output end of the spindle motor 480 rotates, causing it to move along the lead screw 490, driving the tilt adjustment link 450 to rotate around its pivot point with the base 410. The height drive mechanism includes a spindle motor 491 and a lead screw 492 engaged with the output end of the spindle motor 491. The spindle motor 491 is arranged on the height adjustment link 440, and one end of the lead screw 492 is arranged on the base 410. The output end of the spindle motor 491 rotates, causing it to move along the lead screw 492, driving the height adjustment link 440 to rotate around its pivot connection point with the base 410. During tilt adjustment (height adjustment link 440 is locked at this time), as tilt adjustment link 450 rotates, seat frame 410 rotates around axis R41 (i.e., axis of rear cross bar 460) extending through two pivot connection points (i.e., rear upper pivot points) where two height adjustment links 440 are pivotally connected to seat frame 420. During height adjustment (tilt adjustment link 450 is locked at this time and in horizontal position, as shown in FIGS. 5A-5B), since tilt adjustment link 450 and base 410 are roughly in a straight line, the five-bar linkage becomes a four-bar linkage, thereby enabling height adjustment.

FIG5A shows a seat frame 400 including a reclining mechanism using a single motor 480, and FIG5B shows a seat frame 400 including a reclining mechanism using dual motors 480, wherein a motor 480 is disposed on each side of the seat to drive two reclining connecting rods 450. In the case of a single motor 480, the spindle motor 480 and the spindle motor 491 are disposed on both sides of the seat to facilitate load balancing.

Fig. 6A-6D shows the fifth embodiment of the utility model. The seat frame 500 includes a base 510 to be fixed to the vehicle floor, a seat frame 520 located above the base 510, a front link 530, a rear link 540 (i.e., a height adjustment link) and a tilt adjustment link 550. The base 510, the seat frame 520, the front link 530, the rear link 540 and the tilt adjustment link 550 constitute a five-link mechanism (one on each side of the seat). In addition, the seat frame 500 also includes a rear crossbar 560 and a front synchronization rod 570 to synchronize the movement of the two sides of the seat. As shown in Fig. 5C, the two ends of the front synchronization rod 570 are respectively fixed to the two pivot connection points of the two tilt adjustment links 550 on the left and right sides of the seat frame 500 and the base 510, so that the tilt adjustment link 550 can rotate around the axis extending through the two pivot connection points (i.e., the axis of the synchronization rod 570).

In this example, the tilt drive mechanism includes a drive motor 580, a drive gear (not shown) connected to the motor output shaft and a rack 590 meshed therewith, wherein the rack 590 is arranged on the base 510, and the motor and the drive gear are arranged on the tilt adjustment link 550. The height drive mechanism includes a spindle motor 591 and a lead screw 592 meshed with the output end of the spindle motor 591. The spindle motor 591 is arranged on the front side of the frame of the seat frame 520, and one end of the lead screw 592 is arranged on the rear side of the base 510. The output end of the spindle motor 591 rotates to cause it to move along the lead screw 592, driving the height adjustment link 540 to rotate around its pivot connection point with the base 510. During tilt adjustment (when the height adjustment link 540 is locked), as the tilt adjustment link 550 rotates, the seat frame 510 rotates around the axis R51 extending through the two pivot connection points (i.e., the rear lower pivot points) where the two height adjustment links 540 are pivotally connected to the base 510. When adjusting the height (at this time the incline adjustment link 550 is locked and in a horizontal position, as shown in FIGS. 6A-6C ), since the incline adjustment link 550 and the base 510 are roughly in a straight line, the five-bar linkage becomes a four-bar linkage, thereby enabling height adjustment.

In this example, the drive motor 580 and the spindle motor 591 are respectively arranged on both sides of the seat to facilitate load balancing.

7A-7D show a sixth embodiment of the present invention. The seat frame 600 includes a base 610 to be fixed to the vehicle floor, a seat frame 620 located above the base 610, and a front connection The seat frame 600 further comprises a rear connecting rod 630, a rear connecting rod 640 (i.e., a height adjustment connecting rod) and a tilt adjustment connecting rod 650. The base 610, the seat frame 620, the front connecting rod 630, the rear connecting rod 640 and the tilt adjustment connecting rod 650 constitute a five-link mechanism (one on each side of the seat). In addition, the seat frame 600 further comprises a rear cross bar 660 and a front synchronization rod 670 to synchronize the movements of the two sides of the seat. As shown in FIG6C , the two ends of the front synchronization rod 670 are respectively fixed to the two pivot connection points of the two tilt adjustment connecting rods 650 on the left and right sides of the seat frame 600 and the base 610, so that the tilt adjustment connecting rod 650 can rotate around an axis extending through the two pivot connection points (i.e., the axis of the synchronization rod 670).

In this example, the tilt drive mechanism includes a spindle motor 680 and a lead screw 690 engaged with the output end of the spindle motor 680. The spindle motor 680 is disposed on the tilt adjustment link 650, and one end of the lead screw 690 is disposed on the base 610. The output end of the spindle motor 680 rotates, causing it to move along the lead screw 690, driving the tilt adjustment link 650 to rotate around its pivot point with the base 610. The height drive mechanism includes a spindle motor 691 and a lead screw 692 engaged with the output end of the spindle motor 591. The spindle motor 691 is disposed on the front side of the frame of the seat frame 620, and one end of the lead screw 692 is disposed on the rear side of the base 610. The output end of the spindle motor 691 rotates, causing it to move along the lead screw 692, driving the height adjustment link 640 to rotate around its pivot point with the base 610. During tilt adjustment (height adjustment link 640 is locked at this time), as tilt adjustment link 650 rotates, seat frame 610 rotates around axis R61 extending through two pivot connection points (i.e., rear lower pivot points) where two height adjustment links 640 are pivotally connected to base 610. During height adjustment (tilt adjustment link 650 is locked at this time and in a horizontal position, as shown in FIGS. 7A-7D ), since tilt adjustment link 650 and base 610 are substantially in a straight line, the five-bar linkage becomes a four-bar linkage, thereby enabling height adjustment.

In this example, the spindle motor 680 and the spindle motor 691 are respectively arranged on both sides of the seat to facilitate load balancing.

8A-8D show the seventh embodiment of the present invention. The seat frame 700 includes a base 710 to be fixed to the vehicle floor, a seat frame 720 located above the base 710, a front link 730, a rear link 740 (i.e., a height adjustment link), and an inclination adjustment link 750. Base The seat frame 700 comprises a five-link mechanism (one on each side of the seat), a seat frame 710, a front link 730, a rear link 740 and a tilt adjustment link 750. In addition, the seat frame 700 further comprises a rear cross bar 760 and a front synchronization rod 770 to synchronize the movements of the two sides of the seat. As shown in FIG. 7C , the two ends of the front synchronization rod 770 are respectively fixed to the two pivotal connection points of the two tilt adjustment links 750 on the left and right sides of the seat frame 700 and the base 710, so that the tilt adjustment link 750 can rotate around an axis extending through the two pivotal connection points (i.e., the axis of the synchronization rod 770).

In this example, the tilt drive mechanism includes a drive motor 780, a drive gear (not shown) drivingly connected to the motor output shaft and a rack 790 meshing therewith, wherein the rack 790 is arranged on the base 710, and the motor and the drive gear are arranged on the tilt adjustment link 750. The height drive mechanism includes a drive motor 791, a drive gear (not shown) drivingly connected to the motor output shaft and a rack 792 meshing therewith, wherein the rack 792 is arranged on the base 710, and the drive motor 791 and the drive gear are arranged on the height adjustment link 740. During tilt adjustment (when the height adjustment link 740 is locked), as the tilt adjustment link 750 rotates, the seat frame 710 rotates around the axis R71 (i.e., the axis of the rear cross bar 760) extending through two pivot connection points (i.e., the rear upper pivot points) where the two height adjustment links 740 are pivotally connected to the seat frame 720. When adjusting the height (at this time the incline adjustment link 750 is locked and in a horizontal position, as shown in FIGS. 8A-8B ), since the incline adjustment link 750 and the base 710 are roughly in a straight line, the five-bar linkage becomes a four-bar linkage, thereby enabling height adjustment.

FIG8A shows a seat frame 100 including a reclining mechanism using a single motor 780, and FIG8B shows a seat frame 700 including a reclining mechanism using dual motors 780, wherein a motor 780 is disposed on each side of the seat to drive two reclining links 750. In the case of a single motor 780, the drive motor 780 and the drive motor 791 are disposed on both sides of the seat to facilitate load balancing.

9A-9D show an eighth embodiment of the present invention. The seat frame 800 includes a base 810 to be fixed to the vehicle floor, a seat frame 820 located above the base 210, a front link 830, a rear link 840 (i.e., a height adjustment link), and an inclination adjustment link 850. Base 810, the seat frame 820, the front link 830, the rear link 840 and the tilt adjustment link 850 constitute a five-link mechanism (one on each side of the seat). In addition, the seat frame 800 also includes a rear cross bar 860 and a front synchronization rod 870 to synchronize the movements of the two sides of the seat. As shown in FIG8C, the two ends of the front synchronization rod 870 are respectively fixed to the two pivot connection points of the two tilt adjustment links 850 on the left and right sides of the seat frame 800 and the base 810, so that the tilt adjustment link 850 can rotate around the axis extending through the two pivot connection points (i.e., the axis of the synchronization rod 870).

In this example, the tilt drive mechanism includes a spindle motor 880 and a lead screw 890 meshed with the output end of the spindle motor 880. The spindle motor 880 is arranged on the tilt adjustment link 850, and one end of the lead screw 890 is arranged on the base 810. The output end of the spindle motor 880 rotates, causing it to move along the lead screw 890, driving the tilt adjustment link 850 to rotate around its pivot point with the base 810. The height drive mechanism includes a drive motor 891, a drive gear (not shown) connected to the motor output shaft and a rack 892 meshed therewith, wherein the rack 892 is arranged on the base 810, and the drive motor 891 and the drive gear are arranged on the height adjustment link 840. During tilt adjustment (height adjustment link 840 is locked at this time), as tilt adjustment link 850 rotates, seat frame 810 rotates around axis R81 (i.e., axis of rear cross bar 860) extending through two pivot connection points (i.e., rear upper pivot points) where two height adjustment links 840 are pivotally connected to seat frame 820. During height adjustment (tilt adjustment link 850 is locked at this time and in horizontal position, as shown in FIGS. 9A-9B), since tilt adjustment link 850 and base 810 are roughly in a straight line, the five-bar linkage becomes a four-bar linkage, thereby enabling height adjustment.

FIG9A shows a seat frame 800 including a reclining mechanism using a single motor 880, and FIG9B shows a seat frame 800 including a reclining mechanism using dual motors 880, wherein a motor 880 is disposed on each side of the seat to drive two reclining connecting rods 850. In the case of a single motor 880, the spindle motor 880 and the drive motor 891 are disposed on both sides of the seat to facilitate load balancing.

In some cases, features disclosed in the present invention may be independent of other features. On the other hand, when necessary, the features disclosed in the present invention can be combined to provide various combinations.

The words and expressions used in the present invention are illustrative rather than restrictive, and therefore the use of these words and expressions is not intended to exclude any equivalents of the features illustrated and described from the scope of the present invention. Various modifications, variations and alternatives may exist within the scope of the claims. The claims are intended to cover all such equivalents.

Claims

A seat frame for a zero-gravity seat in a vehicle. The seat frame comprises a base to be fixed to a vehicle floor, a seat frame located above the base, a front connecting rod pivotally connected to the seat frame at one end, and a tilt adjustment mechanism, wherein the tilt adjustment mechanism comprises a tilt adjustment connecting rod and a tilt driving mechanism for driving the tilt adjustment mechanism to rotate, the other end of the front connecting rod is hinged to one end of the tilt adjustment connecting rod, and the other end of the tilt adjustment connecting rod is pivotally connected to the base, wherein the seat frame further comprises a front synchronization rod, characterized in that the two ends of the front synchronization rod are respectively fixedly connected to the pivotal connection points of the tilt adjustment connecting rod and the base on both sides of the seat frame.
The seat frame according to claim 1 is characterized in that the inclination driving mechanism includes a driving motor, a driving gear drivingly connected to the motor output shaft and a rack meshing therewith, wherein the rack is arranged on the base, and the motor and the driving gear are arranged on the inclination adjusting connecting rod.
The seat frame according to claim 1 is characterized in that the inclination driving mechanism includes a spindle motor and a screw meshing with the output end of the spindle motor, wherein the spindle motor is arranged on the inclination adjustment link, and one end of the screw is arranged on the base, so that the output end of the spindle motor rotates to cause it to move along the screw, driving the inclination adjustment link to rotate around its pivot point with the base.
The seat frame according to claim 1 is characterized in that the incline adjustment link switches between a locked state and an activated state. In the locked state, the incline adjustment link is in a horizontal position and in a straight line with the base. In the activated state, the incline adjustment link can rotate around its pivot connection point with the base.
The seat frame according to any one of claims 1-4 is characterized in that the seat frame also includes a height adjustment mechanism, which includes a height adjustment link and a height drive mechanism, wherein one end of the height adjustment link is pivotally connected to the rear side of the base, and the other end is pivotally connected to the rear side of the seat frame, and the height drive mechanism drives the height adjustment link to rotate.
The seat frame according to claim 5 is characterized in that the height drive mechanism includes a drive motor, a drive gear connected to the motor output shaft and a rack meshing therewith, wherein the rack is arranged on the height adjustment connecting rod, and the motor and the drive gear are arranged on the frame of the seat frame, or the rack is arranged on the base, and the motor and the drive gear are arranged on the height adjustment connecting rod.
The seat frame according to claim 5 is characterized in that the height drive mechanism includes a spindle motor and a lead screw engaged with the output end of the spindle motor, wherein the spindle motor is arranged on the height adjustment connecting rod, and one end of the lead screw is arranged on the base, so that the output end of the spindle motor rotates to cause it to move along the lead screw, driving the height adjustment connecting rod to rotate around its pivot connection point with the base,

Alternatively, the spindle motor is arranged on the front side of the frame of the seat frame, and one end of the lead screw is arranged on the rear side of the base, so that the output end of the spindle motor rotates to cause it to move along the lead screw, driving the height adjustment link to rotate around its pivot connection point with the base.
The seat frame according to any one of claims 1-4 is characterized in that a tilt adjustment mechanism is provided on both the left and right sides of the seat frame.
The seat frame according to claim 5 is characterized in that height adjustment mechanisms are provided on both left and right sides of the seat frame.
The seat frame according to claim 5 is characterized in that the base is a slide rail structure, and the seat frame can slide along the slide rail along with the inclination adjustment mechanism and the height adjustment mechanism.
A seat frame according to any one of claims 1 to 4, characterised in that the seat frame is directly pivotally connected to the base at the rear side.
A zero-gravity vehicle seat, characterized in that it comprises a seat frame according to any one of claims 1-11.