CN113147531A

CN113147531A - Zero gravity seat skeleton of compact multidirectional regulation

Info

Publication number: CN113147531A
Application number: CN202110640990.5A
Authority: CN
Inventors: 张明; 任四刚; 杨双华
Original assignee: Chongqing Yanfeng Adient Automotive Components Co Ltd
Current assignee: Chongqing Adient Automotive Components Co Ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2021-07-23

Abstract

The invention discloses a compact multidirectional adjustment zero-gravity seat framework, which comprises a base, wherein a seat frame is arranged above the base, the rear part of the seat frame is connected with a backrest framework through an angle adjuster, seat frame adjusting connecting rods are arranged between the front part and the rear part of the seat frame and the base respectively, the seat frame adjusting connecting rods rotate in a vertical plane, each seat frame adjusting connecting rod is hinged with the base through a hinged shaft respectively, a seat frame adjusting connecting rod positioned at the rear part of the seat frame is hinged with the seat frame, the seat frame adjusting connecting rod positioned at the front part is connected with the seat frame through an inclination angle adjusting connecting rod, the seat frame adjusting connecting rods positioned at the front part and the rear part are connected with a rotation driving mechanism respectively, a seat frame side plate of the seat frame and a backrest side plate of the backrest framework on the same side are provided with reinforcing structures respectively, and a guide restraining mechanism for guiding a safety belt to slide is arranged on the rear side of the backrest side plate on the side. The invention has the beneficial effects that: the seat frame height adjustment and the inclination angle adjustment can be realized, stable support is provided for the seat frame, and the safety of a safety belt system is ensured.

Description

Zero gravity seat skeleton of compact multidirectional regulation

Technical Field

The invention belongs to the technical field of automobile seat framework structures, and particularly relates to a compact multidirectional-adjustment zero-gravity seat framework.

Background

The functions of the car seat are more and more abundant, and thus the structural design thereof tends to be complicated. In order to improve the comfort of the seat, a plurality of joints between each part of the seat frame are designed to be adjustable so as to adjust the posture of the seat, thereby sufficiently and appropriately supporting each part of the body, reducing the joint tension and enabling the body to be in a highly relaxed state. Under the concept of 'zero gravity', the seat has multiple adjusting modes and large adjusting amplitude of each part, but the adjustment and the stability and the safety have contradictory relations. Moreover, since the space in the vehicle is limited as a whole, it is also a limiting requirement to reasonably control the space occupied by the seat under the condition of satisfying the adjustment requirement. In addition, "zero gravity" also presents some seat attachment design challenges. For example, the belt retractor of a "zero gravity" seat must be mounted on the seat body, and cannot be mounted on the vehicle body as a conventional seat, due to the large adjustment range. This brings a challenge to the strength of the seat frame, and on the other hand, it also brings a challenge to whether the guiding and sliding states of the seat belt meet the safety requirements. Under such complicated situation, how to rationally design the seat skeleton structure, make it both satisfy the regulation demand of seat gesture, satisfy the requirement of stable safety again is a comprehensive problem.

Disclosure of Invention

In view of the above, the present invention is directed to a compact multidirectional adjustment zero-gravity seat frame. The technical scheme is as follows:

a compact multidirectional-adjustment zero-gravity seat framework comprises a base, wherein a seat frame is arranged above the base, and the rear part of the seat frame is connected with a backrest framework;

the seat frame comprises two seat frame side plates which are oppositely arranged at the left and right, the backrest framework comprises two backrest side plates which are oppositely arranged at the left and right, the two backrest side plates are vertically arranged, and the two backrest side plates are respectively connected with the corresponding seat frame side plates through angle adjusters;

the key point of the method is that,

seat frame adjusting connecting rods are arranged between the front part and the rear part of the seat frame and the base respectively, the seat frame adjusting connecting rods rotate in a vertical plane, and each seat frame adjusting connecting rod is hinged with the base through a hinge shaft respectively;

the seat frame adjusting connecting rod positioned at the rear part of the seat frame is hinged with the seat frame, and the seat frame adjusting connecting rod positioned at the front part of the seat frame is connected with the seat frame through an inclination angle adjusting connecting rod;

the seat frame adjusting connecting rods positioned at the front part and the rear part of the seat frame are respectively connected with a rotation driving mechanism;

the seat frame is characterized in that a reinforcing side plate is arranged on the side plate of the seat frame on any side of the seat frame, a backrest side plate reinforcing piece is arranged on the backrest side plate on the side, and a guide restraining mechanism for guiding the safety belt to slide is arranged on the rear side of the backrest side plate on the side.

As a preferred technical scheme, the rotary driving mechanism comprises an arc-shaped rack and a driving wheel assembly, wherein the driving wheel assembly comprises a driving gear meshed with the arc-shaped rack;

the arc-shaped rack is fixedly connected with the base, the arc-shaped rack is positioned in a vertical plane, and the circular axis of the arc-shaped rack is collinear with the axial axis of the corresponding hinge shaft;

the driving wheel assembly is arranged on the seat frame adjusting connecting rod and rotates along with the seat frame adjusting connecting rod.

As a preferred technical scheme, a rack support is arranged on the base, the rack support is plate-shaped, the rack support is vertically arranged, a toothed plate is fixedly attached to one side of the rack support, a sector annular hole is formed in the toothed plate, and the arc-shaped rack is arranged on any one arc-shaped edge of the sector annular hole;

an arc-shaped hole is formed in the rack support and is opposite to the arc-shaped rack, and the circle center line of the arc-shaped hole is collinear with the axial lead of the hinged shaft;

the driving wheel assembly further comprises a support group and a driving motor, and the support group is fixedly connected with the seat frame adjusting connecting rod;

the driving motor is fixedly arranged on the bracket group, an output shaft of the driving motor is arranged on the bracket group in a self-rotating manner, and the output shaft penetrates through the arc-shaped hole and the fan-shaped hole;

the output shaft is fixedly provided with the driving gear, and the driving gear is located in the fan-shaped hole.

As a preferred technical scheme, the support group comprises a driving wheel support and a motor support, wherein the driving wheel support and the motor support are respectively formed by sheet metal machining and are fixedly connected with the corresponding seat frame adjusting connecting rods, and both the driving wheel support and the motor support are positioned in a vertical plane and are respectively arranged on two sides of the toothed plate and the rack support;

two ends of the output shaft are respectively and rotatably arranged on the driving wheel bracket and the motor bracket;

the driving wheel bracket and the motor bracket are both in a long strip shape, the motor bracket and the seat frame adjusting connecting rod are formed by processing the same sheet metal, and the driving motor is arranged on the motor bracket;

one end of the driving wheel support is connected with the motor support through a connecting rod, and the output shaft penetrates through the end part of the other end of the driving wheel support.

As a preferred technical scheme, a seat frame front cross rod is connected between the front ends of the two seat frame side plates, a seat frame rear cross rod is connected between the rear ends of the two seat frame side plates, and two ends of the seat frame rear cross rod are respectively and rotatably arranged in the corresponding seat frame side plates in a penetrating manner;

the seat frame adjusting connecting rods are connected between the two end parts of the seat frame rear cross rod and the base respectively, the two seat frame adjusting connecting rods are arranged right and left oppositely, the upper ends of the two seat frame adjusting connecting rods are welded and connected with the seat frame rear cross rod, and any one seat frame adjusting connecting rod is connected with the rotation driving mechanism;

the front ends of the two seat frame side plates are respectively connected with one seat frame adjusting connecting rod and one inclination angle adjusting connecting rod between the base, the two seat frame adjusting connecting rods are right arranged left and right, the two inclination angle adjusting connecting rods are also right arranged left and right, a synchronizing rod is connected between the two seat frame adjusting connecting rods, and any one of the seat frame adjusting connecting rods is connected with the rotation driving mechanism.

As a preferred technical scheme, the above-mentioned synchronizing bar is a hollow bar, the two ends of the synchronizing bar are respectively provided with a hinged reinforcement, the hinged reinforcement is tubular, the hinged reinforcement comprises an insertion section and a shearing section which are coaxially connected, the insertion section is inserted into the synchronizing bar, the outer wall of the shearing section is fixedly connected with the seat frame adjusting connecting rod, an outwardly protruding circumferential flange is arranged between the insertion section and the shearing section, and the circumferential flange separates the synchronizing bar from the seat frame adjusting connecting rod;

the hinge reinforcing part is internally provided with a hinge bolt in a penetrating way, a screw rod of the hinge bolt is arranged in the hinge reinforcing part in a penetrating way and is in threaded fit with the hinge reinforcing part, and the hinge bolt is rotatably sleeved with the inclination angle adjusting connecting rod.

As a preferred technical scheme, the hinge bolt comprises a screw head, a polished rod section and a screw rod section which are connected in sequence, the screw rod section is inserted in the hinge reinforcing piece and extends into the synchronous rod, and the polished rod section is sleeved with the inclination angle adjusting connecting rod;

the outer diameter of the screw rod section is larger than that of the screw rod section, a step surface is formed at the joint of the screw rod section and the screw rod section, and the step surface abuts against the end surface of the shear section;

the outer diameter of the polished rod section is smaller than that of the shear section, so that the inclination angle adjusting connecting rod is limited between the end surface of the shear section and the screw head.

As a preferred technical solution, the guiding and restraining mechanism has a sliding cavity for sliding the safety belt, the sliding cavity is a continuous cavity or at least two separated cavities located on the same curve, the sliding cavity defines a safety belt sliding path for sliding the safety belt, and an elastic disturbance element is arranged on the safety belt sliding path;

a support frame for reversing a safety belt is arranged at the upper end of the backrest side plate where the guide constraint mechanism is located, the support frame comprises a support frame body, a reversing through groove is fixedly arranged above the support frame body, the reversing through groove is arranged along the front-back direction, and the rear end of the reversing through groove corresponds to the sliding path of the safety belt;

the support body is fixedly provided with a positioning connecting part below and is a box-shaped structure which is surrounded by plates and has an internal cavity, so that the support body is allowed to collapse downwards when the load loaded on the reversing through groove exceeds the compressive strength of the support body.

As a preferred technical scheme, the guide restraining mechanism comprises a guide strip arranged at the rear side of the backrest framework, one side of the guide strip faces the backrest framework, a limiting plate is arranged at the other side of the guide strip, a flat cavity is defined between the limiting plate and the guide strip, and the cavity forms the sliding cavity;

local sections of the guide strips are alternatively deformed towards two sides of the guide strips to form corrugated plates, the corrugated plates form the elastic disturbance pieces, and lines on the corrugated plates are vertical to the extending direction of the sliding path of the safety belt;

the guide strip has at least one bend.

As a preferred technical scheme, an upper backrest transverse pipe is connected between the upper ends of the two backrest side plates, and a lower backrest transverse plate is connected between the lower ends of the two backrest side plates;

the backrest side plate comprises a side plate metal plate, the side plate metal plate comprises a backrest side plate body extending vertically, two side faces of the backrest side plate body face the left side and the right side of the seat respectively, the front edge of the backrest side plate body is connected with a side plate front flanging, the rear edge of the backrest side plate body is connected with a side plate rear flanging, and the side plate rear flanging and the side plate front flanging are located on the inner side of the backrest side plate body;

two ends of the upper transverse tube of the backrest respectively extend downwards to form side tubes, and the side tubes are attached to the front sides of the rear flanges of the corresponding side plates and the inner sides of the side plate bodies of the backrest and connected with the side plates;

the backrest side plate reinforcing part comprises a first reinforcing metal plate and a second reinforcing metal plate;

the side pipe where the guide constraint mechanism is located extends to the lower end of the side pipe along the rear flanging of the side plate, and the first reinforcing metal plate is connected between the side pipe and the front flanging of the side plate and forms a hollow box-shaped structure in a surrounding mode;

the second is strengthened the panel beating set up in the outside of back sideboard body, this second is strengthened the panel beating and is leaned on the lateral surface of back sideboard body with turn-ups's trailing flank behind the sideboard, this second strengthen the panel beating with back sideboard body welded connection.

As a preferred technical scheme, the seat frame side plate comprises a seat frame side plate body, the edge of the seat frame side plate body is connected with a seat frame side plate flanging facing outwards, the reinforced side plate is positioned at the outer side of the corresponding seat frame side plate, the reinforced side plate is opposite to the seat frame side plate body in parallel, the edge of the reinforced side plate is connected with a reinforced side plate flanging facing towards the seat frame side plate, and the reinforced side plate flanging is overlapped and welded with the corresponding position of the seat frame side plate flanging;

the rear parts of the two seat frame side plates are provided with ISOFIX supports, each ISOFIX support comprises a strip-shaped steel wire frame, two ends of each steel wire frame are respectively and fixedly provided with a mounting frame, and the two mounting frames are in one-to-one correspondence with the two seat frame side plates and are fixedly connected with the two seat frame side plates;

the seat frame is characterized in that two ISOFIX interfaces are arranged on the steel wire frame at intervals, each ISOFIX interface is formed by bending one section of steel wire in the same plane, two ends of each steel wire are vertically bent towards the same side of the middle section of the steel wire to form the ISOFIX interface, two ends of each steel wire are fixed on the steel wire frame, and two ends of each steel wire extend forwards and upwards from the position between the seat frame and the backrest framework along the direction perpendicular to the length direction of the steel wire frame, so that the middle section of each steel wire is located above the seat frame.

Compared with the prior art, the invention has the beneficial effects that: the adjusting structure formed by the connecting rods and the rotating driving mechanism can realize height adjustment and inclination angle adjustment of the seat frame and provide stable support for the seat frame, the reinforcing design on one side of the seat frame meets the requirement of loading stress of the safety belt, and the guide constraint mechanism is arranged on the back side of the seat back to help the stability of the sliding path of the safety belt and ensure the safety of a safety belt system.

Drawings

FIG. 1 is a schematic diagram of a first perspective of the present invention;

FIG. 2 is a schematic diagram of a second perspective of the present invention;

FIG. 3 is a schematic view of a first perspective of the seat frame and its connection structure with the base;

FIG. 4 is an enlarged view of a portion a of FIG. 3;

FIG. 5 is an exploded view of the rotation drive mechanism at the front of the seat frame with the seat frame adjustment link and the tilt adjustment link;

FIG. 6 is a schematic view of the structure of FIG. 5 from another perspective;

fig. 7 is an exploded structural schematic view of the toothed plate and the rack bracket;

FIG. 8 is a second perspective view of the seat frame and its attachment to the base, with the front of the seat frame in an elevated position;

FIG. 9 is a third perspective view of the seat frame and the connection structure with the seat base;

FIG. 10 is a schematic view of a fourth perspective of the seat frame and its connection to the base, with the synchronization rod shown in partial cross-section at the connection to the seat frame adjustment link and the tilt adjustment link;

FIG. 11 is an enlarged view of portion b of FIG. 10;

FIG. 12 is a schematic view of the seat frame adjusting link falling on the limiting support platform;

FIG. 13 is a schematic view of the ISOFIX holder mounted on the bezel in a first view;

FIG. 14 is a schematic view of the ISOFIX holder mounted on the bezel at a second viewing angle;

FIG. 15 is a schematic view of a first perspective of the guide and constraint mechanism;

FIG. 16 is a schematic view of the second view of FIG. 15;

FIG. 17 is a schematic view from a third perspective of FIG. 15;

FIG. 18 is a schematic structural view of the supporting frame;

FIG. 19 is a schematic view of the support bracket being mounted to the seatback frame;

FIG. 20 is a schematic view from another perspective of FIG. 19;

FIG. 21 is a schematic view of a first perspective of a back side panel having a side panel reinforcement;

fig. 22 is a schematic diagram of the structure at the second viewing angle of fig. 21.

Detailed Description

The present invention will be further described with reference to the following examples and the accompanying drawings. For convenience of description, the "up", "down", "left", "right", "front" and "rear" orientations are the corresponding orientations of the seat when installed in a vehicle.

As shown in fig. 1 and 2, a compact multidirectional adjustment zero gravity seat frame comprises a base 501, a seat frame 200 is arranged above the base 501, and a backrest frame 100 is connected to the rear part of the seat frame 200. The seat frame 200 comprises two seat frame side plates 210 which are oppositely arranged left and right, a seat frame front cross rod 230 is connected between the front ends of the seat frame side plates 210, and a seat frame rear cross rod 220 is connected between the rear ends of the seat frame side plates 210. The backrest frame 100 comprises two backrest side plates which are oppositely arranged on the left and right, the two backrest side plates are vertically arranged, an upper backrest transverse pipe 110 is connected between the upper ends of the two backrest side plates, a lower backrest transverse plate is connected between the lower ends of the two backrest side plates, and the two backrest side plates are respectively connected with the corresponding seat frame side plates 210 through angle adjusters. Seat frame adjusting connecting rods 580 are respectively arranged between the front part and the rear part of the seat frame 200 and the base 501, the seat frame adjusting connecting rods 580 all rotate in a vertical plane, and each seat frame adjusting connecting rod 580 is hinged with the base 501 through a hinge shaft 502. The lower end of the seat frame adjusting link 580 at the rear of the seat frame 200 is hinged with the base 501, and the upper end is hinged with the rear of the seat frame 200; a seat frame adjusting link 580 at the front of the seat frame 200 is connected to the seat frame 200 by a reclining link 590. The seat frame adjusting links 580 at the front and rear of the seat frame 200 are respectively connected with a rotation driving mechanism 500, and the rotation driving mechanism 500 is self-locked when not in operation, so as to maintain the position of the corresponding seat frame adjusting link 580 relative to the base 501. Only one rotation driving mechanism 500 works at a time, the rest rotation driving mechanisms 500 are kept in a locking state, and two modes of seat frame height adjustment, seat frame inclination angle adjustment and the like can be adjusted.

As shown in fig. 3 and 13 to 14, a reinforcing side plate 211 is provided on the seat frame side plate 210 on any one side of the seat frame 200, a backrest side plate reinforcement is provided on the backrest side plate on that side, a guide and restraint mechanism 170 for guiding the sliding of the seat belt is provided on the rear side of the backrest side plate on that side, and a support frame 160 for reversing the seat belt is provided on the upper end of the backrest side plate. Since the seatbelt retractor is installed below the seat frame or at the rear side of the backrest, it needs to extend along the rear side of the backrest and escape the backrest, and thus the guide restraint mechanism 170 and the support bracket 160 are designed. Meanwhile, a seat belt hanging point needs to be installed on the seat frame side plate 210 on the same side as the guiding and restraining mechanism 170, so that the backrest side plate and the seat frame side plate 210 on the same side are both designed to be reinforced so as to meet the requirement of bearing the tension or pressure of the seat belt.

As shown in fig. 3 and 8 to 10, both ends of the seat frame rear cross bar 220 are rotatably inserted into the corresponding seat frame side plates 210, respectively. In order to improve the stability of the seat frame 200, two ends of the seat frame rear cross bar 220 are respectively connected with one seat frame adjusting connecting rod 580 between the base 501, the two seat frame adjusting connecting rods 580 connected with the seat frame rear cross bar 220 are arranged right and left, the upper ends of the two seat frame adjusting connecting rods 580 are both connected with the seat frame rear cross bar 220 in a welding manner, and any one of the seat frame adjusting connecting rods 580 is connected with the rotation driving mechanism 500.

One seat frame adjusting connecting rod 580 and one inclination angle adjusting connecting rod 590 are connected between the front ends of the two seat frame side plates 210 and the base 501 respectively. The two seat frame adjusting connecting rods 580 are arranged right and left, and the two inclination angle adjusting connecting rods 590 are also arranged right and left. A synchronization rod 503 is connected between the two seat frame adjusting links 580 on the left and right sides of the seat frame 200. As shown in fig. 9 and 12, the rotation driving mechanism 500 is connected to any one of the seat frame adjusting links 580, and a limiting support platform 501a is disposed below the middle of the seat frame adjusting link 580 on the other side, and the limiting support platform 501a is fixedly disposed on the base 501. The limit support table 501a defines the lowest position of the seat frame adjusting link 580 moving downward.

The seat frame is entirely supported by all of the seat frame adjusting links 580 and the reclining links 590, and the angle of the seat frame adjusting links 580 with respect to the base 501 is also maintained by the rotary drive mechanisms 500, that is, the load loaded on the seat frame 200 is mainly borne by the two rotary drive mechanisms 500. Therefore, the rotation driving mechanism 500 located at the front of the seat frame 200 is close to the seat frame side plate 210 at one side, and the rotation driving mechanism 500 located at the rear of the seat frame 200 is close to the seat frame side plate 210 at the other side, so as to keep the load on the seat frame 200 to be uniformly distributed to both sides thereof as much as possible in the case of using only two rotation driving mechanisms 500, thereby improving the stability of the seat frame 200.

Since the seat frame 200 is in the low position in most cases, the limit support platform 501a is provided below the seat frame adjusting link 580, and as shown in fig. 12, when the seat frame adjusting link 580 falls on the limit support platform 501a, the load on the seat can be transmitted to the seat frame 501, thereby reducing the load on the rotation driving mechanism 500 and helping to keep the seat frame 200 stable.

As shown in fig. 10 and 11, the synchronization rod 503 is a hollow rod, and in order to improve the connection strength and enhance the shear resistance, a hinge reinforcement 504 and a hinge bolt 505 are respectively disposed at two ends of the synchronization rod 503. The hinge reinforcement 504 is tubular, one end of the hinge reinforcement 504 is inserted into the synchronization rod 503, the other end of the hinge reinforcement 504 extends out of the synchronization rod 503, and the outer wall of the extending end of the hinge reinforcement 504 is fixedly connected with a seat frame adjusting link 580. A hinge bolt 505 is inserted into the hinge reinforcement 504, a screw of the hinge bolt 505 is inserted into the hinge reinforcement 504 and is in threaded fit with the hinge reinforcement, and the tilt angle adjusting link 590 is rotatably sleeved on the hinge bolt 505.

Taking as an example the connection structure between either end of the synchronization rod 503 and the bezel adjusting link 580 and the reclining link 590 located at that end:

specifically, as shown in fig. 11, the hinge reinforcement 504 includes an insertion section and a shear section that are coaxially connected, the insertion section is inserted into the synchronization rod 503, and the shear section is externally sleeved with the seat frame adjusting link 580. An outwardly projecting circumferential flange is provided between the insert and shear segments, which separates the synchronization rod 503 and the seat frame adjustment link 580.

The hinge bolt 505 includes a screw head, a polished rod section and a screw rod section connected in sequence, the screw rod section is inserted into the hinge reinforcement 504, and the free end of the screw rod section extends into the synchronizing rod 503 to enhance the strength of the hinge reinforcement 504. The polished rod section is externally sleeved with the inclination angle adjusting connecting rod 590.

The outer diameter of the polished rod section is larger than that of the screw section, and the joint of the polished rod section and the screw section forms a step surface which abuts against the end surface of the shear section so as to keep the positions of the hinge bolt 505 and the hinge reinforcement 504 relatively stable. The outer diameter of the polished rod segment is smaller than that of the shear segment, so that the tilt angle adjusting link 590 is limited between the end surface of the shear segment and the screw head.

In order to reduce the rotation resistance and reduce the friction noise, the polished rod segment is sleeved with a resistance reducing washer 506, the resistance reducing washer 506 comprises a tubular washer body, the washer body is sleeved on the polished rod segment, the inclination angle adjusting connecting rod 590 is sleeved outside the washer body, two edges of the washer body respectively extend outwards along the radial direction to form two annular flanges, and the two annular flanges respectively abut against two side surfaces of the inclination angle adjusting connecting rod 590, so that the inclination angle adjusting connecting rod 590 is separated from the end surface and the screw head of the shear segment.

As a whole, the two seat frame adjusting links 580 at the two ends of the synchronization rod 503 are welded to the corresponding hinge reinforcements 504, and the two seat frame adjusting links 580 are arranged opposite to each other, so that the synchronous rotation is ensured.

As shown in fig. 4-7, the rotational drive mechanism 500 includes an arcuate rack 511 and a drive wheel assembly including a drive gear 530 engaged with the arcuate rack 511. The arc-shaped rack 511 is fixedly connected with the base 501, the arc-shaped rack 511 is located in a vertical plane, and a circular center line of the arc-shaped rack 511 is collinear with a corresponding axial center line of the hinge shaft 502. The drive wheel assembly is disposed on the seat frame adjustment link 580 for synchronous movement therewith. The driving wheel assembly moves along the arc-shaped rack 511 when the driving gear 530 rotates to push the bezel adjusting link 580 to rotate about the corresponding hinge shaft 502 in a vertical plane.

As shown in fig. 5 to 7, a rack support 520 is disposed on the base 501, the rack support 520 is plate-shaped, the rack support 520 is vertically disposed, a toothed plate 510 is fixedly attached to one side of the rack support 520, a sector annular hole 512 is disposed on the toothed plate 510, the arc-shaped rack 511 is disposed on any one arc edge of the sector annular hole 512, and the arc-shaped rack 511 may also be directly processed and formed on the toothed plate 510. An arc-shaped hole 522 is formed in the rack bracket 520 and is opposite to the arc-shaped rack 511, and the circle center line of the arc-shaped hole 522 is collinear with the axial lead of the articulated shaft 502.

Taking the rotation driving mechanism 500 provided at the front of the seat frame 200 as an example: the driving wheel assembly includes a bracket set fixedly connected to the seat frame adjusting link 580, and a driving motor 560. The driving motor 560 is fixedly installed on the bracket set, an output shaft 570 of the driving motor 560 is rotatably installed on the bracket set, and the output shaft 570 penetrates through the arc-shaped hole 522 and the fan-shaped annular hole 512. The output shaft 570 is fixedly provided with the driving gear 530, and the driving gear 530 is located in the sector annular hole 512.

As shown in fig. 6 and 7, the bracket set includes a driving wheel bracket 550 and a motor bracket 540, which are respectively formed by sheet metal and fixedly connected to the corresponding seat frame adjusting link 580, and both of which are located in a vertical plane and are respectively located at two sides of the tooth plate 510 and the rack bracket 520. Both ends of the output shaft 570 are rotatably mounted on the driving wheel bracket 550 and the motor bracket 540, respectively.

Specifically, the driving wheel bracket 550 and the motor bracket 540 are both elongated and are welded to the synchronization rod 503, so as to be integrated. The motor bracket 540 and the seat frame adjusting connecting rod 580 are formed by machining the same sheet metal, and the driving motor 560 is installed on the motor bracket 540. One end of the driving wheel bracket 550 is welded to the synchronizing rod 503, and the output shaft 570 is inserted into the other end thereof. This structure is simple and can keep the stability of the output shaft 570.

The motor bracket 540 includes a motor bracket plate, and the middle portion of the motor bracket plate is offset to a side away from the tooth plate 510, so that the distance between the portion of the motor bracket plate facing the tooth plate 510 and the rack bracket 520 is increased to form a separation region for accommodating the tooth plate 510.

As shown in fig. 7, a part of the rack bracket 520 is offset to a side away from the tooth plate 510, so as to form an arc-shaped groove 521 with an opening facing the tooth plate 510, the arc-shaped groove 521 extends along a direction parallel to the direction of the arc-shaped rack 511, the width of the arc-shaped groove 521 is not less than the tip circle diameter of the driving gear 530, the bottom of the arc-shaped groove 521 is close to the corresponding end surface of the driving gear 530, the arc-shaped hole 522 penetrates through the bottom of the arc-shaped groove 521, and the width of the arc-shaped hole 522 is less than the tip circle diameter of the driving gear 530. The arc hole 522 plays a role in guiding and restricting the movement of the output shaft 570, and the arc groove 521 plays a role in axially limiting the driving gear 530, so that the stability of the driving wheel assembly moving along the arc rack 511 is improved.

The structure of the rotation driving mechanism 500 provided at the rear of the seat frame 200 is identical to the structure of the rotation driving mechanism 500 provided at the front of the seat frame 200, except that the installation structure is different: the driving wheel bracket 550 and the motor bracket 540 of the rotation driving mechanism 500 at the rear of the seat frame 200 are welded to the seat frame rear rail 220.

The rotation driving mechanism 500 provided at the rear of the seat frame 200 is configured for height adjustment of the seat frame 200, and the rotation driving mechanism 500 provided at the front of the seat frame 200 is configured for tilt adjustment of the seat frame 200. One of the modes is controlled not to work, and the other mode works, so that the adjustment of the corresponding mode can be realized.

Since the arc-shaped rack of the rotary driving mechanism 500 is kept stationary and the driving assembly moves with the movement of the driving gear 530, the space required for the seat frame adjusting assembly is reduced and the seat structure is more compact when the height or inclination of the seat frame is adjusted by the same stroke, compared to the adjusting structure of the prior art in which the driving assembly is stationary and the rack moves, since the driving assembly moves within the length range of the arc-shaped rack 511. Due to the compact structure, the two rotation driving mechanisms 500 are arranged below the inner hole of the seat frame 200. Under the same seat frame 200 adjusting stroke, the occupied space position of the seat frame of the application is reduced, and particularly when the seat frame 200 is adjusted to the highest position, the height of the seat frame 200 from the vehicle floor is lower than that of the seat frame 200 in the prior art.

As shown in fig. 13 and 14, the ISOFIX support 300 is installed at the rear portion of the two seat frame side plates 210, the ISOFIX support 300 includes a strip-shaped steel wire frame 310, two ends of the steel wire frame 310 are respectively and fixedly provided with a mounting bracket 320, and the two mounting brackets 320 are in one-to-one correspondence with the two seat frame side plates 210 and are fixedly connected. The steel wire frame 310 is provided with two ISOFIX interfaces 330 at intervals, the ISOFIX interfaces 330 are formed by bending a section of steel wire in the same plane, two ends of the steel wire are perpendicularly bent towards the same side of the middle section of the steel wire to form the ISOFIX interfaces 330, two ends of the steel wire are fixed on the steel wire frame 310, and two ends of the steel wire extend forwards and upwards from between the seat frame 200 and the backrest frame 100 along the direction perpendicular to the length direction of the steel wire frame 310, so that the middle section of the steel wire is located above the seat frame 200.

In this embodiment, the mounting bracket 320 is in the shape of a strip plate, the shape of the mounting bracket 320 is adapted to the shape of the seat frame side plate flanging at the rear edge of the seat frame side plate 210 and is arranged along the trend of the seat frame side plate flanging, and one side of the mounting bracket 320 abuts against the corresponding side plate flanging. A pre-positioning connecting part is arranged at one end of the mounting rack 320, a fastening connecting part is arranged at the other end of the mounting rack 320, and the pre-positioning connecting part and the fastening connecting part are connected with the corresponding edge plate flanging.

In this embodiment, since the portion of the seat frame side plate 210 that is matched with the mounting frame 320 is curved, the mounting frame 320 is a strip-shaped arc plate, and the longer side of the arc plate is an arc side. The concave surface of the mounting bracket 320 is flanged against the corresponding seat frame side plate. The prepositioning connecting part is an inserting block 321, the inserting block 321 is connected to one short side of the mounting rack 320, the extending end of the inserting block 321 extends to the concave side of the mounting rack 320 and bends towards the middle part, and the inserting block 321 is inserted into the flanging of the side plate of the seat frame. The fastening connection portion is a fastening screw hole 322 formed in the mounting frame 320, a local plate body of the mounting frame 320 where the fastening screw hole 322 is located protrudes towards the convex surface side to form a screw hole reinforcing protrusion, a fastening bolt penetrates through the fastening screw hole 322, and the mounting frame 320 is connected with the flanging of the seat frame side plate through the fastening bolt.

As shown in fig. 13, a holding bracket 340 is connected between two ends of the steel wire, the holding bracket 340 includes a rigid plate abutting against the same side of the bent steel wire, the other side of the steel wire abuts against the steel wire frame 310, and the rigid plate is bent to wrap the steel wire and is welded to the steel wire corresponding to the portions of the two ends of the steel wire.

The steel wire frame 310 is a U-shaped pipe with a groove-shaped section, and the steel wire frame 310 and the mounting frame 320 are formed by sheet metal processing through one plate, so that the production steps are reduced. The wire frame 310 is formed into a U-shaped pipe, which can improve strength and rigidity. The steel wire is arranged on the outer side surface of the groove wall on any side of the U-shaped pipe, and two ends of the steel wire are perpendicular to the groove wall of the U-shaped pipe and extend to penetrate through the groove walls on two sides of the U-shaped pipe, so that the connection strength between the ISOFIX interface 330 and the steel wire frame 310 is improved, and the stability of the steel wire frame 310 is enhanced.

When the seat frame 200 rotates around the seat frame rear cross bar 220, the angle and relative position of the ISOFIX interface 330 to the seat frame 200 remain unchanged, thereby facilitating installation of the child seat. This scheme has solved among the prior art ISOFIX interface 330 when fixedly mounted on seat frame back horizontal pole 220, is not suitable for the problem of zero gravity seat. Because when the seat frame 200 rotates around the seat frame rear cross bar 220, the angle between the ISOFIX interface and the seat frame 200 changes, so that the child seat cannot be installed, or after the child seat is installed, the seat frame inclination angle adjustment is limited or even cannot be adjusted.

As shown in fig. 13, the reinforcing side plate 211 is located outside the corresponding seat frame side plate 210, the reinforcing side plate 211 is opposite to the seat frame side plate body in parallel, the edge of the reinforcing side plate 211 is connected with a reinforcing side plate flange facing the seat frame side plate 210, and the reinforcing side plate flange is overlapped and welded with the corresponding position of the seat frame side plate flange.

As shown in fig. 1 to 2 and 21 to 22, the backrest side plate includes a side plate metal plate 130, the side plate metal plate 130 includes a backrest side plate body 131 extending vertically, two side surfaces of the backrest side plate body 131 face the left and right sides of the seat respectively, a front edge of the backrest side plate body 131 is connected with a side plate front flange 133, a rear edge of the backrest side plate body 131 is connected with a side plate rear flange 132, and the side plate rear flange 132 and the side plate front flange 133 are located on the inner side of the backrest side plate body 131. The front edge of the back side plate body 131 extends forward from the upper end to the middle of the back side plate body 131, so that the upper end to the middle of the back side plate body 131 is widened gradually, thereby satisfying the purposes of installing various seat accessory structural members, connecting with an angle adjuster, and increasing the strength of a seat frame side plate.

The two ends of the upper backrest cross tube 110 extend downward to form side tubes 120, and the side tubes 120 are attached to the front sides of the corresponding side plate rear flanges 132 and the inner sides of the backrest side plate bodies 131. The upper portion of the side panel rear flange 132, the upper portion of the side panel front flange 133 and the upper portion of the back side panel body 131 are wrapped around and abut the side tube 120.

One of the side tubes 120 extends down to the middle of the side panel rear flange 132, and the other side tube 120 extends down to the lower end of the side panel rear flange 132, and a back side panel reinforcement is provided on the back side panel on that side. The back side panel reinforcement includes a first reinforcement sheet 140 and a second reinforcement sheet 150.

The first reinforcing metal plate 140 is connected between the corresponding side tube 120 and the front flange 133 of the side plate, and the three form a hollow box-shaped structure. The first reinforcing sheet metal 140 includes a first reinforcing plate 141, the first reinforcing plate 141 is disposed parallel to the backrest side plate body 131, and a rear edge of the first reinforcing plate 141 is provided with a first rear flange 142, and the first rear flange 142 abuts against and is welded to the side tube 120. The front edge of the first reinforcing plate 141 is provided with a first forward flange 143 facing the backrest side plate body 131, the first forward flange 143 is adapted to the shape of the side plate forward flange 133, and the first forward flange 143 abuts against the side plate forward flange 133 and is welded thereto.

The second reinforcing metal plate 150 is arranged on the outer side of the backrest side plate body 131, the second reinforcing metal plate 150 is attached to the outer side face of the backrest side plate body 131 and the rear side face of the side plate rear flange 132, and the second reinforcing metal plate 150 is connected with the backrest side plate body 131 in a welded mode. The second reinforcing sheet metal 150 includes a second reinforcing plate 151, the second reinforcing plate 151 is attached to the side plate rear flange 132, the second reinforcing plate 151 is close to the edge of the back side plate body 131 and is connected with a second flange 152 facing forward, the second flange 152 is attached to the back side plate body 131 and is welded to the back side plate body 131, and the lower portion of the second flange 152 is identical to the lower portion of the back side plate body 131 in shape. A bar-shaped reinforcing rib protruding backward is formed on the second reinforcing plate 151 to improve the strength thereof.

The left and right side plate metal plates 130 of the seat back frame are in mirror symmetry, so that the production is convenient, and only the first reinforcing metal plate 140 and the second reinforcing metal plate 150 are added to reinforce the side plate of the seat back frame. During assembly, the side tube 120 and the two side plate panels 130 are assembled first, and then the first reinforcing panel 140 and the second reinforcing panel 150 are welded to the side of the backrest side plate to be reinforced.

As shown in fig. 15 to 17, a guide restricting mechanism 170 is provided on the rear side of the back side plate having the back side plate reinforcement. The guiding and restraining mechanism 170 has a sliding cavity 176 for sliding the seat belt, the sliding cavity 176 is a continuous cavity or at least two separated cavities on the same curve, the sliding cavity 176 defines a seat belt sliding path for sliding the seat belt, and an elastic disturbance member 172 is disposed on the seat belt sliding path. The elastic disturbance member 172 generates elastic vibration when being touched by the sliding seat belt, thereby playing a role of shifting the seat belt and reducing resistance when the seat belt retracts.

The guide restricting mechanism 170 includes a guide bar 171, one side of the guide bar 171 faces the corresponding back side plate, and a stopper plate 173 is provided at the other side of the guide bar 171.

At least two limiting plate groups are arranged on the guide bar 171, each limiting plate group comprises two limiting plates 173, and the two limiting plates 173 are arranged oppositely and are respectively positioned on two sides of the guide bar 171. The limiting plate 173 is strip-shaped, the limiting plate 173 extends along the direction of the guide bar 171, the cross section of the limiting plate 173 is L-shaped, one long edge of the limiting plate 173 is connected with the edge of the rear side of the guide bar 171, and the other long edge of the limiting plate 173 is located at the rear side of the guide bar 171 and is parallel to the guide bar. The limiting plate 173 and the guide bar 171 enclose a flat cavity, which forms the sliding cavity 176.

The guide strip 171 has at least one bend to accommodate the curvature of the rear side of the back side panel. In this embodiment, as shown in fig. 17, the back side plate includes a rear convex section at the upper part and a front convex section at the lower part, and the rear convex section and the front convex section are smoothly and transitionally connected. The bending part is positioned between the limiting plate groups.

One form of the elastic disturbance 172 is a corrugated plate formed by partial segments of the guide bars 171 being deformed alternately to both sides thereof, the corrugation of which is perpendicular to the extension direction of the belt slip path. The corrugated plate is positioned between the limiting plate groups.

At least three guide bar seats 174 are fixed on the rear side of the backrest side plate where the guide bars 171 are located, all the guide bar seats 174 are distributed along the backrest side plate, the same guide bar 171 is installed on all the guide bar seats 174, and the limiting plate groups are distributed among the guide bar seats 174.

As shown in fig. 15 and 16, the guide bar seat 174 is disposed at the rear recess of the front convex section, a curved limiting steel wire 175 is fixedly disposed on the guide bar seat 174, the limiting steel wire 175 passes backwards around the guide bar 171, both ends of the limiting steel wire 175 are fixedly connected to the guide bar seat 174, respectively, and the middle section of the limiting steel wire 175 is parallel to the guide bar 171. Since the direction of the seat belt is largely changed at the stopper wire 175, the stopper wire 175 capable of receiving a large tension is provided to restrain the seat belt in order to slide the seat belt along the rear side of the back plate.

In use, a seat belt (not shown) is threaded through the sliding chamber 176 and slides along a seat belt sliding path, the seat belt abutting against the corrugated plate on a side of the curved intrados of the seat belt sliding path. Since the seat belt is inserted into the sliding cavity 176 along the guide strip 171, the seat belt bends along the direction of the guide strip 171, and particularly at the position of the stopper wire 175, the rear side of the seat belt abuts against the stopper wire 175. But where the front side of the safety belt abuts against the buckle. Since the webbing passes through the plurality of curved portions and rubs against the sliding chamber 176 and the inner wall of the guide bar 171 during sliding, the webbing may be jammed during retraction. When the corrugated plate is triggered by the safety belt to vibrate towards two sides, the safety belt is always in a state of small-amplitude vibration when retracting and sliding, and clamping stagnation can be effectively prevented.

As shown in fig. 18 to 20, the support frame 160 includes a support body, a reversing through slot 164 is fixedly disposed above the support body, the reversing through slot 164 is disposed along a front-back direction, and a rear end of the reversing through slot 164 corresponds to the belt sliding path. The positioning connecting part is fixedly arranged below the bracket body, and the bracket body is a box-shaped structure which is surrounded by plates and has an internal cavity, so that the bracket body is allowed to collapse downwards when the load loaded on the reversing through groove 164 exceeds the compressive strength of the bracket body.

Specifically, the support body includes first backup pad 161 and the second backup pad 162 of vertical setting, and the two sets up relatively, the top of first backup pad 161 and second backup pad 162 is supported has same the logical groove 164 of switching-over, first backup pad 161 and second backup pad 162 are located respectively the both sides cell wall below of the logical groove 164 of switching-over, it has rib 163 to shape respectively on first backup pad 161 and the second backup pad 162. The ribs 163 extend parallel to the bottom surface of the reversing through slots 164, and the ribs 163 are formed by partially inward or outward protruding plates that surround the bracket body.

After the ribs 163 are formed, the local areas of the board where the ribs 163 are located have an increased resistance to forces acting in the direction along the ribs 163, and a relatively small increase in resistance to compressive stresses perpendicular to the ribs 163. When the tension applied to the bottom surface of the reversing through groove 164 by the safety belt exceeds the compressive strength of the bracket body, the whole bracket body collapses downwards, the height is reduced, and the bracket body is not easy to deform in other directions. After the whole support body is collapsed downwards, the safety belt is closer to the seat backrest, the trunk of the passenger is bound at the position close to the seat backrest, the forward moving range of the trunk of the passenger is reduced, and the safety is further improved.

A transverse connecting plate 165 is further arranged between the first supporting plate 161 and the second supporting plate 162, the transverse connecting plate 165 is located in a vertical plane, two side edges of the transverse connecting plate 165 are respectively connected with the same side edges of the first supporting plate 161 and the second supporting plate 162, and the transverse connecting plate 165 and the first supporting plate 161 and the second supporting plate 162 are integrally formed, so that the bracket body is formed.

The second supporting plate 162 extends downward beyond the lower edge of the transverse connecting plate 165, and at least two ribs 163 are formed on the second supporting plate 162.

The positioning connection portion is an arc-shaped plate, and the number of the arc-shaped plates is two, namely a first arc-shaped plate 166 and a second arc-shaped plate 167. The first arc plate 166 is integrally formed under the first support plate 161, and the inner arc surface of the first arc plate 166 faces downward. The second arc-shaped plate 167 is integrally formed below the second supporting plate 162, and the inner arc surface of the second arc-shaped plate 167 faces the first supporting plate 161. When the backrest frame is assembled, the inner curved surface of the first arc-shaped plate 166 falls on and is welded to the backrest upper cross tube 110, and the inner curved surface of the second arc-shaped plate 167 abuts against and is welded to the corresponding side tube 120, so that the support frame 160 is fixedly mounted on the backrest frame. The reversing channel 164 is spaced from the upper cross tube 110 of the backrest to allow room for the collapse of the bracket.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. A compact multidirectional-adjustment zero-gravity seat framework comprises a base (501), wherein a seat frame (200) is arranged above the base (501), and the rear part of the seat frame (200) is connected with a backrest framework (100);

the seat frame (200) comprises two seat frame side plates (210) which are oppositely arranged left and right, the backrest framework (100) comprises two backrest side plates which are oppositely arranged left and right, the two backrest side plates are vertically arranged, and the two backrest side plates are respectively connected with the corresponding seat frame side plates (210) through angle adjusters;

the method is characterized in that:

seat frame adjusting connecting rods (580) are arranged between the front portion and the rear portion of the seat frame (200) and the base (501), the seat frame adjusting connecting rods (580) rotate in a vertical plane, and each seat frame adjusting connecting rod (580) is hinged to the base (501) through a hinge shaft (502);

the seat frame adjusting connecting rod (580) positioned at the rear part of the seat frame (200) is hinged with the seat frame (200), and the seat frame adjusting connecting rod (580) positioned at the front part of the seat frame (200) is connected with the seat frame (200) through an inclination angle adjusting connecting rod (590);

the seat frame adjusting connecting rods (580) positioned at the front part and the rear part of the seat frame (200) are respectively connected with a rotation driving mechanism (500);

the seat frame side plate (210) on any side of the seat frame (200) is provided with a reinforcing side plate (211), the backrest side plate on the side is provided with a backrest side plate reinforcing piece, and the rear side of the backrest side plate on the side is provided with a guide restraining mechanism (170) for guiding a safety belt to slide.

2. The compact multidirectional adjustment zero-gravity seat frame as in claim 1, wherein: the rotational drive mechanism (500) comprises an arcuate rack (511) and a drive wheel assembly comprising a drive gear (530) in meshing engagement with the arcuate rack (511);

the arc-shaped rack (511) is fixedly connected with the base (501), the arc-shaped rack (511) is positioned in a vertical plane, and the circular axis of the arc-shaped rack (511) is collinear with the axial axis of the corresponding hinge shaft (502);

the drive wheel assembly is disposed on and rotates with the seat frame adjustment link (580).

3. The compact multidirectional adjustment zero-gravity seat frame as in claim 2, wherein: the rack support (520) is arranged on the base (501), the rack support (520) is plate-shaped, the rack support (520) is vertically arranged, a toothed plate (510) is fixedly attached to one side of the rack support (520), a sector annular hole (512) is formed in the toothed plate (510), and the arc-shaped rack (511) is arranged on any one arc-shaped edge of the sector annular hole (512);

an arc-shaped hole (522) is formed in the rack bracket (520) opposite to the arc-shaped rack (511), and the circular axis of the arc-shaped hole (522) is collinear with the axial axis of the hinged shaft (502);

the driving wheel assembly further comprises a support group and a driving motor (560), and the support group is fixedly connected with the seat frame adjusting connecting rod (580);

the driving motor (560) is fixedly installed on the bracket set, an output shaft (570) of the driving motor (560) is installed on the bracket set in a rotating manner, and the output shaft (570) penetrates through the arc-shaped hole (522) and the fan-shaped annular hole (512);

the output shaft (570) is fixedly provided with the driving gear (530), and the driving gear (530) is positioned in the fan-shaped annular hole (512).

4. The compact multidirectional adjustment zero-gravity seat frame as in claim 3, wherein: the bracket group comprises a driving wheel bracket (550) and a motor bracket (540), the driving wheel bracket and the motor bracket are respectively formed by sheet metal machining and fixedly connected with the corresponding seat frame adjusting connecting rod (580), and the driving wheel bracket and the motor bracket are both positioned in a vertical plane and are respectively arranged on two sides of the toothed plate (510) and the rack bracket (520);

two ends of the output shaft (570) are respectively and rotatably arranged on the driving wheel bracket (550) and the motor bracket (540);

the driving wheel bracket (550) and the motor bracket (540) are both long strips, the motor bracket (540) and the seat frame adjusting connecting rod (580) are formed by machining the same sheet metal, and the driving motor (560) is installed on the motor bracket (540);

one end of the driving wheel bracket (550) is connected with the motor bracket (540) through a connecting rod, and the end part of the other end of the driving wheel bracket is provided with the output shaft (570) in a penetrating way.

5. The compact multidirectional adjustment zero-gravity seat frame as in any one of claims 1 to 4, wherein: a seat frame front cross rod (230) is connected between the front ends of the two seat frame side plates (210), a seat frame rear cross rod (220) is connected between the rear ends of the two seat frame side plates, and two ends of the seat frame rear cross rod (220) are respectively and rotatably arranged in the corresponding seat frame side plates (210) in a penetrating manner;

the seat frame adjusting connecting rods (580) are connected between two end parts of the seat frame rear cross rod (220) and the base (501), the two seat frame adjusting connecting rods (580) are arranged right and left oppositely, the upper ends of the two seat frame adjusting connecting rods (580) are welded with the seat frame rear cross rod (220), and any one seat frame adjusting connecting rod (580) is connected with the rotation driving mechanism (500);

two the front end of seat frame sideboard (210) respectively with be connected with one between base (501) seat frame regulation connecting rod (580) and an inclination regulation connecting rod (590), two about seat frame regulation connecting rod (580) just to setting up, two inclination regulation connecting rod (590) also just to setting up about, two be connected with synchronizing rod (503) between seat frame regulation connecting rod (580), wherein arbitrary one seat frame regulation connecting rod (580) are connected with rotation actuating mechanism (500).

6. The compact multidirectional adjustment zero-gravity seat frame as in claim 5, wherein: the synchronous rod (503) is a hollow rod, the two ends of the synchronous rod (503) are respectively provided with a hinged reinforcing piece (504), the hinged reinforcing piece (504) is tubular, the hinged reinforcing piece (504) comprises an inserting section and a shearing section which are coaxially connected, the inserting section is inserted into the synchronous rod (503), the outer wall of the shearing section is fixedly connected with the seat frame adjusting connecting rod (580), an outward convex annular flange is arranged between the inserting section and the shearing section, and the annular flange separates the synchronous rod (503) from the seat frame adjusting connecting rod (580);

the hinge reinforcing piece (504) is internally provided with a hinge bolt (505) in a penetrating way, a screw rod of the hinge bolt (505) is arranged in the hinge reinforcing piece (504) in a penetrating way and is in threaded fit with the hinge reinforcing piece, and the hinge bolt (505) is rotatably sleeved with the inclination angle adjusting connecting rod (590).

7. The compact multidirectional adjustment zero-gravity seat frame as in claim 5, wherein: the guiding and restraining mechanism (170) is provided with a sliding cavity (176) for sliding the safety belt, the sliding cavity (176) is a continuous cavity or at least two separated cavities positioned on the same curve, the sliding cavity (176) defines a safety belt sliding path for sliding the safety belt, and an elastic disturbance element (172) is arranged on the safety belt sliding path;

a support frame (160) used for reversing the safety belt is arranged at the upper end of the backrest side plate where the guide constraint mechanism (170) is located, the support frame (160) comprises a support body, a reversing through groove (164) is fixedly arranged above the support body, the reversing through groove (164) is arranged along the front-back direction, and the rear end of the reversing through groove (164) corresponds to the sliding path of the safety belt;

the support body is fixedly provided with a positioning connecting part below, and the support body is a box-shaped structure which is surrounded by plates and has an internal cavity so as to allow the support body to collapse downwards when the load loaded on the reversing through groove (164) exceeds the compressive strength of the support body.

8. The compact multidirectional adjustment zero-gravity seat frame as in claim 8, wherein: the guide constraint mechanism (170) comprises a guide strip (171) arranged at the rear side of the backrest frame, one side of the guide strip (171) faces the backrest frame, a limit plate (173) is arranged at the other side of the guide strip (171), a flat cavity is enclosed between the limit plate (173) and the guide strip (171), and the cavity forms the sliding cavity (176);

local sections of the guide strips (171) are alternatively deformed towards two sides of the guide strips to form corrugated plates, the corrugated plates form the elastic disturbance elements (172), and lines on the corrugated plates are perpendicular to the extending direction of the sliding path of the safety belt;

the guide bar (171) has at least one bend.

9. A compact multidirectional adjustment zero-gravity seat frame as in claim 1 or claim 2, wherein: a backrest upper transverse pipe (110) is connected between the upper ends of the two backrest side plates, and a backrest lower transverse plate is connected between the lower ends of the two backrest side plates;

the backrest side plate comprises a side plate metal plate (130), the side plate metal plate (130) comprises a backrest side plate body (131) which extends vertically, two side surfaces of the backrest side plate body (131) face the left side and the right side of the seat respectively, the front edge of the backrest side plate body (131) is connected with a side plate front flanging (133), the rear edge of the backrest side plate body (131) is connected with a side plate rear flanging (132), and the side plate rear flanging (132) and the side plate front flanging (133) are positioned on the inner side of the backrest side plate body (131);

two ends of the backrest upper transverse pipe (110) respectively extend downwards to form side pipes (120), and the side pipes (120) are attached to the front sides of the corresponding side plate rear flanges (132) and the inner sides of the backrest side plate bodies (131) and are connected with the side plates;

the backrest side plate reinforcing part comprises a first reinforcing sheet metal (140) and a second reinforcing sheet metal (150);

the side pipe (120) where the guide constraint mechanism (170) is located extends to the lower end of the side pipe along the side plate rear flanging (132), and a first reinforcing metal plate (140) is connected between the side pipe (120) and the side plate front flanging (133) and forms a hollow box-shaped structure in a surrounding mode;

the second is strengthened panel beating (150) set up in the outside of back sideboard body (131), this second is strengthened panel beating (150) and is leaned on the lateral surface of back sideboard body (131) and the trailing flank of sideboard back turn-ups (132), this second strengthen panel beating (150) with back sideboard body (131) welded connection.

10. A compact multidirectional adjustment zero-gravity seat frame as in claim 1 or claim 2, wherein: the seat frame side plate (210) comprises a seat frame side plate body, the edge of the seat frame side plate body is connected with a seat frame side plate flanging facing outwards, the reinforced side plate (211) is positioned at the corresponding outer side of the seat frame side plate (210), the reinforced side plate (211) is parallel to and opposite to the seat frame side plate body, the edge of the reinforced side plate (211) is connected with a reinforced side plate flanging facing towards the seat frame side plate (210), and the reinforced side plate flanging is overlapped and welded with the corresponding position of the seat frame side plate flanging;

the rear parts of the two seat frame side plates (210) are provided with ISOFIX supports (300), each ISOFIX support (300) comprises a strip-shaped steel wire frame (310), two ends of each steel wire frame (310) are respectively and fixedly provided with a mounting frame (320), and the two mounting frames (320) are in one-to-one correspondence with the two seat frame side plates (210) and are fixedly connected with the two seat frame side plates;

the steel wire frame (310) is provided with two ISOFIX interfaces (330) at intervals, the ISOFIX interfaces (330) are formed by bending a section of steel wire in the same plane, two ends of the steel wire are perpendicularly bent towards the same side of the middle section of the steel wire to form the ISOFIX interfaces (330), two ends of the steel wire are fixed on the steel wire frame (310), and two ends of the steel wire extend forwards and upwards from the space between the seat frame (200) and the backrest framework (100) along the length direction perpendicular to the steel wire frame (310), so that the middle section of the steel wire is located above the seat frame (200).