CN212604692U - Backrest assembly for three-door vehicle seat and vehicle seat - Google Patents

Abstract

The utility model relates to a back assembly and vehicle seat for three door vehicle seat, the utility model discloses a back assembly has back skeleton and locates the elastic support portion on the back skeleton, and two back sideboard about relative are had to the back skeleton, connects entablature and bottom end rail between two back sideboard to and two connecting plates that set up with each back sideboard one-to-one, each connecting plate via EZ-entry mechanism and the back sideboard pivotal connection that corresponds with adjusting back skeleton angle, and two back sideboard are the gradually big formula setting that expands outward of interval between the two to all be equipped with the installation notch with installation EZ-entry mechanism in the bottom of each back sideboard. The utility model discloses a back assembly for three door vehicle seat, through constructing two back sideboard for the interval between the two is the gradually big formula structure that expands outward, can receive when the vehicle strikes for in the passenger embedding seat on the vehicle seat, thereby can effectively reduce the damage that the passenger received.

Description

Backrest assembly for three-door vehicle seat and vehicle seat

Technical Field

The utility model relates to a vehicle parts technical field, in particular to a back assembly for three door vehicle seats, simultaneously, the utility model discloses still relate to a vehicle seat who has this back assembly.

Background

A vehicle seat is an indispensable component in a vehicle, and serves to support an occupant and provide better comfort to the occupant. In daily travel, the backrest assembly of the conventional vehicle seat can only support the back of a human body and cannot protect passengers when the vehicle collides, so that the using effect of the backrest assembly is greatly reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a backrest assembly for a three-door vehicle seat, which can effectively reduce the damage to the passenger when the vehicle is impacted.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a backrest assembly for a three-door vehicle seat is provided with a backrest framework and an elastic supporting part arranged on the backrest framework, wherein the backrest framework is provided with two backrest side plates which are opposite to each other in the left-right direction, an upper cross beam and a lower cross beam which are connected between the two backrest side plates, and two connecting plates which are arranged in one-to-one correspondence with the two backrest side plates, each connecting plate is in pivot connection with the corresponding backrest side plate through an EZ-entry mechanism for adjusting the angle of the backrest framework, the two backrest side plates are arranged in an outward expanding mode with gradually enlarged distance between the two backrest side plates, and the bottom end of each backrest side plate is provided with a mounting notch with an opened bottom for mounting the EZ-entry mechanism.

Furthermore, an energy absorption part which can form the self-collapsing energy absorption of the connecting plate is constructed on the connecting plate.

Furthermore, the connecting plate comprises a main body with an angle adjuster through hole and a first flanging turned towards one side of the main body, and the energy absorbing part is a crumple slot which is formed on the first flanging and extends to the main body.

Furthermore, the two backrest side plates are both provided with a pull wire mounting hole for mounting an EZ-entry pull wire.

Furthermore, the backrest side plate and the connecting plate are respectively provided with a torsion spring connecting part for connecting a torsion spring.

Furthermore, the connecting plate is provided with an ISOFIX mounting hole for mounting an ISOFIX support.

Furthermore, side air bag mounting holes are formed in the two backrest side plates, and far-end air bag mounting holes are formed in the backrest side plate on at least the right side.

Furthermore, the elastic supporting part is a backrest spring arranged on the backrest framework, and a backrest spring mounting part for mounting the backrest spring is arranged on each backrest side plate and the lower cross beam.

Compared with the prior art, the utility model discloses following advantage has:

a back assembly for three door vehicle seat, through constructing two back sideboard for interval between the two is the gradually big formula structure that expands outward, can receive when the vehicle strikes for in the passenger embedding seat on the vehicle seat, thereby can effectively reduce the damage that the passenger received, and then can make this back assembly have better result of use.

Furthermore, the utility model discloses a set up energy-absorbing portion on the connecting plate, can effectively prevent EZ-entry mechanism inefficacy after the vehicle bumps to can improve the guard action to the passenger. And energy-absorbing portion adopts the groove that contracts of ulcerating, and its simple structure, the design implementation of being convenient for, and through setting up ISOFIX mounting hole, can be convenient for install ISOFIX mechanism.

Another objective of the present invention is to provide a vehicle seat, which includes a seat cushion assembly, and further includes a backrest assembly for a three-door vehicle seat as described above, and a locking mechanism configured between the backrest assembly and the seat cushion assembly for locking the relative positions of the backrest assembly and the seat cushion assembly, and an unlocking structure configured for unlocking the locking mechanism; wherein, the unlocking structure includes:

the unlocking wheel disc is pivotally arranged on the backrest framework, and is provided with an execution line connected with an external execution end and a first unlocking line connected with the locking mechanism;

the execution line restriction portion and the first unlocking line restriction portion are configured to restrict the execution lines and the first unlocking lines which are in one-to-one correspondence with the execution lines and the first unlocking lines to slide around the unlocking wheel disc respectively, and the execution line restriction portion is far away from the pivoting shaft of the unlocking wheel disc relative to the unlocking line restriction portion.

Furthermore, both ends of the execution line constraint portion are provided with execution line connection points which can be connected with the execution line, both ends of the first unlocking line constraint portion are provided with first connection points which can be connected with the first unlocking line, one side of the unlocking wheel disc is provided with a line hanging block which is arranged in a protruding mode, the line hanging block is provided with a second connection point, the second connection point is connected with a second unlocking line, one end of the second unlocking line is connected with the locking mechanism, a second unlocking line constraint portion is formed between the line hanging block and the unlocking wheel disc, the second unlocking line constraint portion and the first unlocking line constraint portion are of an arc structure which is arranged in an equal diameter mode, and the second unlocking line constraint portion is configured to constrain the second unlocking line to slide around the line hanging block.

Compared with the prior art, the utility model discloses following advantage has:

the utility model discloses a vehicle seat, through adopting as above backrest assembly, can have better security performance, simultaneously, through setting up the unblock rim plate of being connected with execution line and first unblock line, and construct the about portion of execution line and the about portion of first unblock line of arc structure on this unblock rim plate, and make the pivot axis setting that the unblock rim plate was kept away from to the about portion of execution line for the about portion of unblock line, thereby can be according to the principle that moment equals, make required unblock power invariant and power value less when unblock vehicle seat, and then can solve the unstable difficult problem of unblock power of current unblock structure when the unblock.

Additionally, the utility model discloses make the about portion of executive line and the about portion of first unblock line arrange relatively on the unblock rim plate, can be favorable to realizing the unblock to locking mechanism. And the two ends of the execution line restriction part and the first unlocking line restriction part are respectively provided with an execution line connection point and a first connection point which can be connected with the execution line and the first unlocking line in one-to-one correspondence with the execution line and the first unlocking line, so that the unlocking structure can be applied to both the main driver seat and the assistant driver seat.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

FIG. 1 is a schematic structural view of a backrest assembly for a three-door vehicle seat according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a backrest frame according to a first embodiment of the present invention;

fig. 3 is a schematic partial structural view of a left backrest side plate according to a first embodiment of the present invention;

fig. 4 is a schematic structural view of a left reinforcing plate according to a first embodiment of the present invention;

fig. 5 is a schematic structural view of a torsion spring according to a first embodiment of the present invention;

fig. 6 is a schematic partial structural view of a right backrest side plate according to a first embodiment of the present invention;

fig. 7 is a schematic structural view of a back spring according to a first embodiment of the present invention;

fig. 8 is a schematic structural diagram of a connection plate according to a first embodiment of the present invention;

fig. 9 is a schematic structural view of a connection plate according to a first embodiment of the present invention at another viewing angle;

fig. 10 is a schematic structural view of an unlocking structure for a vehicle seat according to a second embodiment of the present invention;

fig. 11 is an exploded perspective view of an unlocking structure for a vehicle seat according to a second embodiment of the present invention;

fig. 12 is an assembly state diagram of the unlocking wheel disc and the lower housing according to the second embodiment of the present invention;

fig. 13 is a schematic structural view of an upper housing according to a second embodiment of the present invention;

fig. 14 is a schematic structural view of a lower housing according to a second embodiment of the present invention;

fig. 15 is a schematic structural view of an unlocking wheel disc according to a second embodiment of the present invention;

fig. 16 is a schematic structural view of an unlocking wheel disc according to another viewing angle in the second embodiment of the present invention;

fig. 17 is a diagram illustrating an application state of the unlocking structure for a vehicle seat to a manual main driver seat according to the second embodiment of the present invention;

fig. 18 is an application state diagram of the unlocking structure for the vehicle seat according to the second embodiment of the present invention to the manual passenger seat;

fig. 19 is a connection state diagram of the unlocking wheel disc, the actuating line and the first unlocking line according to the second embodiment of the present invention;

fig. 20 is another schematic structural diagram of an unlocking wheel disc according to the second embodiment of the present invention;

fig. 21 is a diagram illustrating an application state of the unlocking structure for a vehicle seat to an electric main driving seat according to the second embodiment of the present invention;

fig. 22 is an application state diagram of the unlocking structure for the vehicle seat according to the second embodiment of the present invention to the electric front passenger seat;

description of reference numerals:

1-a shell;

11-an upper shell, 111-a shaft sleeve, 112-a clamping head, 113-an inserting plate and 114-an upper groove;

12-lower shell, 121-slot, 122-clamp hole, 123-lower groove, 124-mounting column;

2-unlocking the wheel disc;

21-execution block, 211-execution arc slot, 212-execution line connection hole;

22-unlocking block, 221-shaft hole, 222-first connecting hole, 223-first arc-shaped groove;

23-harness guide, 231-arcuate guide surface;

24-wire hanging block, 241-second arc groove, 242-second connecting hole;

3-an actuating wire, 4-a first unlocking wire, 5-a protective pipe, 6-a pull belt, 7-a core wire joint and 8-a second unlocking wire;

101-backrest framework, 1011-right backrest side plate and 10111-far-end air bag mounting hole;

1012-upper beam;

1013-left backrest side plate, 10131-mounting notch, 10132-stay wire mounting hole, 10133-clamping hole, 10134-side air bag mounting hole, 10135-backrest spring mounting hole, 10136-torsion spring connecting hole;

1014-a lower cross beam;

102-left reinforcement plate, 103-torsion spring, 104-backrest spring;

105-connecting plate, 1051-cushion connecting hole, 1052-first flanging, 10521-ISOFIX mounting hole, 1053-second flanging and 1054-collapsing groove.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Example one

The present embodiment relates to a back assembly for a three-door vehicle seat, which has a back frame and an elastic support portion provided on the back frame. The backrest framework is provided with two backrest side plates which are opposite left and right, an upper cross beam and a lower cross beam which are connected between the two backrest side plates, and two connecting plates which are arranged in one-to-one correspondence with the backrest side plates, each connecting plate is in pivot connection with the corresponding backrest side plate through an EZ-entry mechanism for adjusting the angle of the backrest framework, the two backrest side plates are arranged in an outward expanding mode with gradually increased distance between the two backrest side plates, and the bottom end of each backrest side plate is provided with an installation notch for installing the EZ-entry mechanism.

The back assembly for three door vehicle seat of this embodiment, through constructing two back sideboard for the interval between the two is the expanding structure outward that gradually enlarges, can receive when the vehicle strikes for in the passenger embedding seat on the vehicle seat, thereby can effectively reduce the damage that the passenger received, and then can make this back assembly have better result of use.

An exemplary structure of the backrest assembly for a three-door vehicle seat of the present embodiment is shown in fig. 1 and 2 based on the above overall design, in which a hollow portion is formed between two backrest side plates of the backrest frame 101, the upper cross member 1012, and the lower cross member 1014. For the sake of convenience, the left side back side plate in fig. 2 is referred to as "right back side plate 1011" and the right side back side plate is referred to as "left back side plate 1013" in the occupant seating state.

As shown in fig. 2, a mounting notch 10131 for mounting an EZ-entry mechanism is formed at a bottom end of the left back plate 1013, and a wire mounting hole 10132 for mounting an EZ-entry wire is formed thereon. In addition, as shown in fig. 3, a side airbag mounting hole 10134 is formed in the left back frame 1013, the side airbag mounting hole 10134 specifically includes two spaced apart holes, and an oblong hole is used as one side airbag mounting hole 10134 for the convenience of the flatbed design. In addition, as a possible embodiment, the distance between the two side airbag mounting holes 10134 formed on the left back side plate 1013 of the present embodiment is 55 mm.

In addition, in order to improve the structural strength of each backrest side plate, a reinforcing plate is arranged at the bottom end of each backrest side plate. Specifically, as shown in fig. 4, a left reinforcing plate 1022 is welded to a bottom end of the left backrest side plate 1013, and a through hole corresponding to the recliner mounting hole 10131 is formed in the left reinforcing plate 1022. In addition, a torsion spring connecting portion, specifically a torsion spring connecting hole 10136 formed on the left back edge plate 1013 for connecting the torsion spring 103 shown in fig. 5, is provided on the left back edge plate 1013, and the torsion spring connecting hole 10136 is provided through the left reinforcement plate 1022.

In this embodiment, a locking hole 10133 is formed at an upper portion of the left back side plate 1013 adjacent to the side air bag installation hole 10134, and a plastic buckle for hooking a back spring 104 described below is locked in the locking hole 10133. The elastic support portion is specifically a back arm spring 104 provided on the back frame 101, and a back spring mounting portion for mounting the back spring 104 is provided on each back side plate and the lower cross beam 1014. Specifically, the lower portion of the left back sideplate 1013 is configured with a back spring mounting hole 10135 provided through itself and the left reinforcement plate 1022. Thus, when the backrest spring 104 is installed, the upper end thereof is hooked in the plastic button, and the lower end thereof is inserted into the backrest spring installation hole 10135. The back spring mounting portion formed on the lower cross member 1014 is embodied as two spaced hook plates formed on the lower cross member 1014, and the lower end of the back spring 104 is engaged with the two hook plates.

As shown in fig. 6, the specific structure of the right back edge plate 1011 of the present embodiment is similar to that of the left back edge plate 1013. Except that the distance between the two side airbag mounting holes 10134 formed on the right back panel 1011 is 70 mm. In addition, a far-end airbag mounting hole 10111 is further formed on the right backrest edge plate 1011 for mounting a far-end airbag. And the distal airbag mounting holes 10111 specifically include two spaced apart distal airbag mounting holes 10111, wherein the upper distal airbag mounting hole 10111 coincides with the upper side airbag mounting hole 10134. In addition, as a possible implementation, the distance between the two distal balloon mounting holes 10111 of the present embodiment is 80 mm.

The connecting plate 105 of the present embodiment is constructed as shown in fig. 8 and 9, and includes a main body, a first flange 1052 folded toward one side of the main body, and a second flange 1053 formed by continuously folding twice toward the same side of the main body, and a recliner through hole formed on the main body corresponding to the recliner, and a seat cushion connecting hole 1051 for connecting with a seat cushion assembly. In addition, in order to constitute the installation of the torsion spring 103 shown in fig. 5 on the present back frame 101, a torsion spring coupling hole to couple the torsion spring 103 is also constituted on the coupling plate 105. As shown in fig. 8, the torsion spring connection hole is specifically an oblong hole configured on the second flange 1053, so that the other end of the torsion spring 103 can be bent and clamped on the second flange 1053.

By providing the oblong holes and the torsion spring connection holes 10136, two ends of the torsion spring 103 can be respectively disposed in the torsion spring connection hole 10136 on one side and the oblong hole on the other side, thereby realizing the installation of the torsion spring 103 on the backrest frame 101. In addition, in order to improve the safety of the backrest assembly, as shown in fig. 9, an energy absorbing portion is further formed on the connecting plate 105 to absorb energy when the connecting plate 105 itself collapses, and the energy absorbing portion is specifically a collapsing groove 1054 formed on the first flange 1052 and extending to the main body. By the arrangement, the angle adjuster can be effectively prevented from being out of work after the vehicle is collided, so that the protection effect on passengers can be improved. In addition, in order to further improve the using effect, an ISOFIX mounting hole 10521 is further configured on the first flange 1052 to mount an ISOFIX mechanism in the prior art.

Finally, it is worth noting that in order to improve the structural stability of the backrest frame, the welding positions of the parts connected by welding are that the planes of the lug bosses and the grooves are connected.

Example two

The present embodiment relates to a vehicle seat, which includes a seat cushion assembly, a backrest assembly for a three-door vehicle seat as described in the first embodiment, a locking mechanism configured between the backrest assembly and the seat cushion assembly for locking the relative positions of the backrest assembly and the seat cushion assembly, and an unlocking mechanism configured to unlock the locking mechanism. Wherein, the concrete structure of seatpad assembly and locking mechanism refers to prior art can.

The unlocking structure of this embodiment mainly includes an unlocking wheel disc, an execution line restriction portion and a first unlocking line restriction portion, and an execution line connected to an external execution end and a first unlocking line connected to a locking mechanism are provided on the unlocking wheel disc. The unlocking wheel disc is arranged on the backrest framework 101 in a pivoting mode, and the external execution end is a pull belt arranged on the backrest framework 101.

The execution line restriction portion and the first unlocking line restriction portion are both constructed on the unlocking wheel disc 2 and are both arc-shaped structures arranged along a pivot shaft of the unlocking wheel disc. In addition, the actuation wire restraint portion and the first unlocking wire restraint portion are configured to restrain the actuation wire and the first unlocking wire, which correspond one-to-one to the actuation wire and the first unlocking wire, from sliding around the unlocking wheel disc, respectively, and the actuation wire restraint portion is disposed away from the pivot shaft of the unlocking wheel disc with respect to the unlocking wire restraint portion.

The unlocking structure for the vehicle seat of the embodiment is characterized in that the unlocking wheel disc connected with the actuating line and the first unlocking line 4 is arranged, the actuating line constraint part and the first unlocking line constraint part of the arc-shaped structure are constructed on the unlocking wheel disc, and the actuating line constraint part is far away from the pivot shaft relative to the unlocking line constraint part, so that the vehicle seat can be unlocked by constant and small unlocking force input by the actuating line according to the principle that the moment is equal, and the vehicle seat can have good operation perception.

Based on the above design concept, an exemplary structure of the unlocking structure for the vehicle seat of the present embodiment is as shown in fig. 10 to 12, and the unlocking wheel 2 is specifically installed in the housing 1 and is installed on the upper cross beam 1012 via the housing 1. As shown in fig. 11, for the convenience of manufacturing, the housing 1 of the present embodiment has a substantially rectangular structure, and includes an upper housing 11 and a lower housing 12 which are connected by being fastened up and down and are surrounded to form a receiving cavity. In addition, for the convenience of connection, the upper shell 11 and the lower shell 12 of the present embodiment are connected by clipping. In addition, as shown in fig. 10, a plurality of bundle holes are formed on two opposite sides of the housing 1.

Specifically, as shown in fig. 13, the upper case 11 of the present embodiment is formed with a boss 111 projecting toward the inside thereof for mounting the pivot shaft of the unlocking wheel 2. A plurality of clips 112 are formed on each side of the upper housing 11 to be connected with the lower housing 12 in a snap-fit manner, and the structure of the clips 112 is similar to that of the prior art. In addition, as shown in the state of fig. 4, two insertion plates 113 protruding outward are respectively formed on the left and right side plates of the upper case 11.

The insertion board 113 of the present embodiment can be inserted into the insertion slot 121 described below to form the wiring harness hole, and the insertion connection between the insertion board 113 and the insertion slot 121 can also improve the connection firmness between the upper housing 11 and the lower housing 12. As a preferred embodiment, the inserting plate 113 of the present embodiment is tapered, and an arc-shaped notch is formed at the free end of the inserting plate 113. Further, as shown in fig. 13, an upper groove 114 is formed on the upper case 11 between the two insert plates 113 to form the above-described harness hole around a lower groove 123 described below.

The structure of the lower housing 12 of the present embodiment is as shown in fig. 14, wherein the lower housing 12 is configured with latches corresponding to the respective chucks 112, and the latches are formed with latch holes 10133122 for latching connection with the chucks 112. In addition, corresponding to the insertion plate 113, the lower housing 12 is configured with insertion grooves 121 adapted to the insertion plate 113, and due to the insertion of the insertion plate 113 into each insertion groove 121, a wire harness hole for passing a wire harness is formed therebetween as shown in fig. 1.

Meanwhile, as shown in fig. 14 in combination with fig. 10, a lower groove 123 is formed on the lower housing 12 corresponding to the upper groove 114 of the upper housing 11, and is configured to form the wiring harness hole with the upper groove 114. In addition, based on the state shown in fig. 14, three mounting posts 124 are formed at intervals on the top of the lower housing 12, and mounting holes are formed on the mounting posts 124, through which the housing 1 is mounted on the upper cross beam 1012.

The structure of the unlocking wheel 2 is shown in fig. 15 and fig. 16, and comprises an actuating block 21 and an unlocking block 22 which are fixedly connected together, wherein the actuating block 21 and the unlocking block 22 are both arc-shaped blocks, and the two arc-shaped blocks are coaxially arranged but have different radiuses. In addition, the central angle of the unlocking block 22 is larger than that of the actuating block 21, and a shaft hole 221 is formed on the unlocking block 22, so that the shaft hole 221 can be sleeved on the shaft sleeve 111 of the shell 1, and the pivoting arrangement of the unlocking wheel disc 2 is realized. In addition, in order to effectively ensure the tangential sliding of the actuating wire 3 along the actuating block 21, a wire harness guide 23 is formed on the unlocking wheel 2, which is located outside the end of the arc-shaped groove on the actuating block 21, as shown in fig. 15. And the wire harness guide portion 23 has an arc-shaped guide surface 231 provided with the same diameter as the groove bottom of the arc-shaped groove.

In addition, in order to improve the operation feeling when the seat is unlocked, the executive line restraint portion and the first unlocking line restraint portion of the present embodiment are disposed oppositely on the unlocking wheel 2. Based on the above-described specific structure of the unlocking wheel 2, as shown in fig. 15 and 16, the actuation line restraint portion is specifically an arc-shaped groove configured thereon along the edge of the actuation piece 21, and the first unlocking line restraint portion is an arc-shaped groove configured thereon along the edge of the unlocking piece 22. Here, for the convenience of the following description, the arc-shaped grooves configured on the actuating block 21 and the unlocking block 22 will be referred to as "actuating arc-shaped groove 211" and "first arc-shaped groove 223", respectively.

In addition, in order to make the unlocking structure of this embodiment be applicable to both the manual main driver seat and the manual assistant driver seat, in this embodiment, the two ends of the executing arc-shaped groove 211 are both provided with the executing line 3 connecting points which can be connected with the executing line 3, and the two ends of the first arc-shaped groove 223 are both provided with the first connecting points which can be connected with the first unlocking line 4. With this arrangement, as shown in fig. 21 and 22, the arrangement positions of the actuation wire 3 and the first unlocking wire 4 on the actuation arc-shaped groove 211 and the first arc-shaped groove 223 are changed, so that the unlocking structure can be applied to both the main driver seat and the front passenger seat.

Still referring to fig. 15 and 16, the actuating wire 3 connecting point of the present embodiment is embodied as a connecting hole formed in the actuating block 21 and communicating with the actuating arc-shaped groove 211, and the first connecting point is embodied as a connecting hole communicating with the first arc-shaped groove 223. And as a preferred embodiment the axial direction of each coupling hole is arranged in the axial direction of the pivot axis of the unlocking wheel 2. In addition, for convenience of the following description, the connection hole on the execution block 21 is referred to as "execution line connection hole 212" herein, and the connection hole on the unlocking block 22 is referred to as "first connection hole 222".

In the present embodiment, to improve the unlocking effect, as shown in fig. 19, no matter the actuation wire 3 or the first unlocking wire 4 is hung in the respective corresponding connecting holes via the core wire joints 7 provided at the end portions thereof, and the core wire joints 7 are cylindrical in shape and are fitted with the connecting holes. As shown in fig. 19, the protection tube 5 is provided on each of the actuating wire 3 and the first unlocking wire 4, and the actuating wire 3 and the first unlocking wire 4 pass through the harness hole via the protection tube 5. So set up, not only can effectively prevent to carry out line 3 and first unlocking line 4 by the 1 incised wound of casing, also can effectively guarantee simultaneously that each pencil slides along the tangential of unblock rim plate 2.

In addition, in order to make the unlocking structure of the present embodiment applicable to a power seat, as shown in fig. 20, based on a conventional power seat having a locking mechanism with two unlocking wires, in the present embodiment, a convex wire hanging block 24 is provided on one side of the unlocking wheel 2, the wire hanging block 24 is specifically configured on the unlocking block 22, and a second connecting point arranged opposite to the first connecting point is provided thereon. The second connection point is used for arranging a second unlocking wire 8 connected with a locking mechanism of the electric seat.

In addition, a second unlocking line restraining portion is formed between the wire hanging block 24 and the execution block 21, the second unlocking line restraining portion and the first unlocking line restraining portion are of arc-shaped structures with equal diameters, and the second unlocking line restraining portion is configured to restrain the second unlocking line 8 from sliding around the wire hanging block 24. The second unlocking wire 8 of the present embodiment is constrained by a second arc-shaped slot 241 formed by enclosing the wire hanging block 24 and the actuating block 21. Based on the arc-shaped groove structure of the second unlocking line restriction portion, similar to the above structure, the second connection point of the present embodiment is a connection hole communicated with the second arc-shaped groove 241, and specifically, is respectively disposed at two ends of the second arc-shaped groove 241. And for convenience of description, the connection hole constituting the second connection point will be referred to as "second connection hole 242".

As shown in fig. 21, by providing the second arc-shaped groove 241 and the second connection hole 242, the first unlocking line 4 and the second unlocking line 8 can be connected to the locking mechanism of the electric main driving seat, respectively, and then the unlocking wheel disc 2 can be rotated by pulling the pull belt 6 connected to the actuating line 3, so that the first unlocking line 4 and the second unlocking line 8 can be pulled to unlock the locking mechanism. In addition, as shown in fig. 22, the unlocking structure of the present embodiment can be applied to the electric front passenger seat by changing the hooking positions of the actuation wire 3, the first unlocking wire 4, and the second unlocking wire 8 on the unlocking wheel 2.

Based on the above overall description, the vehicle seat of the present embodiment not only reduces the required unlocking force by making the radius of the actuating arc-shaped groove 211 larger than the radii of the first arc-shaped groove 223 and the second arc-shaped groove 241, but also makes the required unlocking force constant, thereby solving the difficult problem of poor operation perception caused by the instability of the unlocking force in the existing unlocking structure.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A backrest assembly for a three-door vehicle seat, the backrest assembly having a backrest frame (101) and an elastic support provided on the backrest frame (101), characterized in that: the backrest frame (101) is provided with two backrest side plates which are opposite left and right, an upper cross beam (1012) and a lower cross beam (1014) which are connected between the two backrest side plates, and two connecting plates (105) which are arranged in a one-to-one correspondence manner with the two backrest side plates, each connecting plate (105) is in pivot connection with the corresponding backrest side plate through an EZ-entry mechanism which adjusts the angle of the backrest frame (101), the two backrest side plates are arranged in an outward expanding manner with gradually enlarged distance between the two backrest side plates, and the bottom end of each backrest side plate is provided with a mounting notch (10131) with an open bottom for mounting the EZ-entry mechanism.

2. A backrest assembly for a three door vehicle seat as defined in claim 1, wherein: the connecting plate (105) is provided with an energy absorbing part which can form the self-collapsing energy absorption of the connecting plate (105).

3. A backrest assembly for a three door vehicle seat as defined in claim 2, wherein: the connecting plate comprises a main body with a through hole of the angle adjuster, and a first flanging (1052) turned towards one side of the main body, and the energy absorbing part is a crumple groove (1054) formed on the first flanging (1052) and extending to the main body.

4. A backrest assembly for a three door vehicle seat as defined in claim 1, wherein: and the two backrest side plates are both provided with a pull wire mounting hole (10132) for mounting an EZ-entry pull wire.

5. A backrest assembly for a three door vehicle seat as defined in claim 1, wherein: and the backrest side plate and the connecting plate (105) are respectively provided with a torsion spring connecting part for connecting a torsion spring (103).

6. A backrest assembly for a three door vehicle seat as defined in claim 1, wherein: and ISOFIX mounting holes (10521) for mounting the ISOFIX supports are formed in the connecting plate (105).

7. A backrest assembly for a three door vehicle seat as defined in claim 1, wherein: side air bag mounting holes (10134) are formed in the two backrest side plates, and far-end air bag mounting holes (10111) are formed in at least the right backrest side plate.

8. A backrest assembly for a three door vehicle seat as defined in claim 1, wherein: the elastic supporting part is a backrest spring (104) arranged on the backrest framework (101), and a backrest spring mounting part for mounting the backrest spring (104) is arranged on each backrest side plate and the lower cross beam (1014).

9. A vehicle seat comprising a seat cushion assembly, characterized in that: the backrest assembly for a three-door vehicle seat as claimed in any one of claims 1 to 8, wherein a locking mechanism for locking the relative positions of the backrest assembly and the seat cushion assembly and an unlocking mechanism for unlocking the locking mechanism are arranged between the backrest assembly and the seat cushion assembly; wherein, the unlocking structure includes:

the unlocking wheel disc (2) is pivotally arranged on the backrest framework (101), and an actuating line (3) connected with an external actuating end and a first unlocking line (4) connected with the locking mechanism are arranged on the unlocking wheel disc (2);

the unlocking device comprises an execution line constraint part and a first unlocking line constraint part, wherein the execution line constraint part and the first unlocking line constraint part are constructed on the unlocking wheel disc (2) and are arc-shaped structures which encircle a pivoting shaft of the unlocking wheel disc (2), the execution line constraint part and the first unlocking line constraint part are configured to respectively constrain the execution lines (3) and the first unlocking lines (4) which are in one-to-one correspondence with the execution lines and the first unlocking lines to slide around the unlocking wheel disc (2), and the execution line constraint part is far away from the pivoting shaft of the unlocking wheel disc (2) relative to the unlocking line constraint part.

10. The vehicle seat according to claim 9, characterized in that: execution line connection points which can be connected with the execution lines (3) are arranged at both ends of the execution line constraint part, first connection points which can be connected with the first unlocking lines (4) are arranged at both ends of the first unlocking line constraint part, a convex wire hanging block (24) is arranged on one side of the unlocking wheel disc (2), a second connecting point is arranged on the wire hanging block (24), a second unlocking wire (8) with one end connected with the locking mechanism is connected to the second connecting point, and a second unlocking line restraining part is formed between the wire hanging block (24) and the unlocking wheel disc (2), the second unlocking line constraint part and the first unlocking line constraint part are arc structures arranged in an equal diameter way, and the second unlocking line restraint portion is configured to restrain the second unlocking line (8) from sliding around the line hanging block (24).

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