JP3360556B2 - Vehicle seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat and, more particularly, to a vehicle seat such as an automobile when an impact of a predetermined value or more acts on an occupant seated on a vehicle seat from behind the vehicle.
The present invention relates to a vehicle seat that supports an occupant's head with a headrest.

[0002]

2. Description of the Related Art Conventionally, in a seat of a vehicle such as an automobile, for example, a driver's seat, when a load exceeding a predetermined value acts on a driver due to a rear-end collision of another vehicle from behind the own vehicle, an occupant of the vehicle is required. Vehicle seats that can reduce the gap between the head and the headrest have already been proposed. Hereinafter, this type of vehicle seat is disclosed.
The configuration shown in -1842 will be described.

[0003] As shown in FIG.
At 00, the load from the occupant 102, which is applied to the seat back 104 by the movement of the upper body of the occupant 102 moving rearward due to the impact at the time of the rear impact, is applied to the shock receiving frame disposed in front of the seat back frame 106. 108
Of the impact pressure receiving frame 1
08, the impact pressure receiving frame 108
Headrest support frame 110 connected to the upper end of the
Is moved rearward. The intermediate portion of the headrest support frame 110 is rotatably supported by the seat back frame 106 by the rotating member 112, and the rearward movement of the lower end portion causes the headrest 114 fixed to the upper end portion of the headrest support frame 110 to move forward. It is possible to move and reduce the gap between the head 102A of the occupant 102 and the headrest 114.

[0004]

However, in the vehicle seat 100, the upper back 10 of the occupant 102 is not provided.
The headrest 114 is substantially in proportion to the backward movement amount of the 2B.
The vehicle seat 100 moves forward depending on the physique, driving posture, and the like of the occupant 102.
Upper part 102B and head 102A of the occupant 102 seated at
If the positional relationship in the front-rear direction changes, the headrest 114A cannot effectively support the head 102A.

In view of the above, it is an object of the present invention to provide a vehicle seat capable of effectively supporting the occupant's head by a headrest at the time of a rear collision.

[0006]

SUMMARY OF THE INVENTION According to the present invention, there is provided a vehicle seat having a headrest supported by a seatback, the chest provided at a position corresponding to the chest of an occupant in the seatback. Support means and said chest support
The rearward movement of the occupant's chest support position
Move the headrest toward the occupant's head
Means and the headrest abuts against the occupant's head;
To prevent the headrest from moving toward the occupant's head.
Moving amount adjusting means for preventing the occupant's chest from moving backward by the chest supporting means .

Accordingly, when the load of the occupant is loaded on the seat back in the vehicle rear crash, moving occupant chest backward, the passenger
As the chest moves backward, the headrest
The headrest moves to the occupant head side. Then
When the rest comes in contact with the occupant's head,
This prevents the headrest from moving toward the occupant's head
At the same time, the rearward movement of the occupant's chest by chest support means
Will be blocked. In other words, the headrest
Movement of the occupant's chest backwards based on the chest support means
The amount is adjusted. For example, if the occupant is leaning forward
In the case of a rear collision, the contact position of the headrest with the occupant's head
Is on the front side of the vehicle, so the headrest and the occupant's head
Back of occupant's chest by chest support until contact
The headrest abuts the occupant's head.
The occupant's posture in the event of a collision is maintained in a forwardly inclined state. Also squared
If the posture of the worker is up, the headrest
The contact position with the head of the occupant is on the rear side of the vehicle.
Chest support until the rest rests against the occupant's head
The amount of rearward movement of the occupant's chest due to
A state in which the occupant's posture when the strike abuts the occupant's head is raised
To hold. As a result, when the head of the occupant abuts on the headrest, the posture variation of the occupant, that is, the relative displacement between the head and the chest in the front-rear direction can be reduced, and the head and the chest of the occupant can be effectively supported. .

The present invention according to claim 2 provides a seat back
Vehicle seat with headrest supported by
At the position corresponding to the occupant's chest in the seat back
Chest support means, and an occupant chest support of the chest support means
With the rearward movement of the holding position, the headrest
A headrest moving means for moving the head side, the header
The chest support means based on the front-rear adjustment position of the drest
Forward and backward of the occupant's chest by the chest support means
Moving amount adjusting means for adjusting the moving amount of
Features .

Therefore, when the load of the occupant is applied to the seat back at the time of a rear collision, the occupant's chest moves rearward, and the headrest is moved to the occupant's head side by the headrest moving means with the occupant's chest moving backward. I do. At this time,
Based on the front and rear adjustment position of the headrest adjusted by the member,
The amount of movement adjustment means allows the chest support
The amount of rearward movement of the occupant's chest by the head support means has been adjusted.
You. For example, the occupant adjusts the front / rear adjustment position of the headrest forward.
If set to, the occupant's head will be
The amount of backward movement of the occupant head before contacting
At the same time as the occupant's chest
The momentum is also reduced. Also, the occupants adjust the front and rear of the headrest
If the rearrangement position is set to the rear,
Move the occupant's head backwards until it touches the headrest
As the momentum increases, the occupant's chest by means of chest support
The amount of rearward movement becomes larger. As a result, the occupant's head
Back of the occupant's head until
The amount of movement and the amount of backward movement of the occupant's chest are substantially proportional, and the occupant's posture variation, that is, the relative displacement of the head and chest in the front-rear direction can be reduced, and the occupant's head and chest can be effectively supported. .

[0010]

[0011]

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] A first embodiment of a vehicle seat according to the present invention will be described below with reference to FIGS. In addition,
In the figure, an arrow FR indicates a vehicle forward direction, an UP indicates a vehicle upward direction, and an arrow IN indicates a vehicle width inside direction.

As shown in FIG. 2, the vehicle seat 10 of the present embodiment is a driver's seat of an automobile, and an occupant (driver) 11 sits thereon.

As shown in FIG. 1, the seat back 12 of the seat 10 has a structure including a well-known seat back frame 14, a seat back cushion 15, and a seat cover 16. At the lower position of the seat back 12 corresponding to the pelvis 11A (see FIG. 2) of the occupant 11 seated on the seat 10, an S spring 17 for supporting the pelvis of the occupant is provided horizontally. Both ends of the S spring 17 are fixed to the lower part 14A of the seat back frame 14, and the lower part 15A of the seat back cushion 15 located on the front side of the S spring 17
To support the rearward displacement.

The chest 11 of the occupant 11 sitting on the seat 10
B (see FIG. 2), an upper panel 22 as a chest support means is provided horizontally on an upper portion 14B of the seat back frame 14 of the seat back 12 corresponding to B. Back panel 22
Is configured by an arc-shaped plate material in a side view shape,
At both ends of the back panel 22, front ends 24A of arms 24 as headrest moving means extending substantially rearward of the vehicle are fixed. The arm 24 is in the middle 2
4B is rotatably supported by a shaft 26 erected in the upper portion 14B of the seat back frame 14 in a direction facing each other. The counterclockwise rotation direction of FIG. 2 can be rotated clockwise in FIG. 2 (direction of arrow B in FIG. 2).

An elongated hole 28 is formed in the vicinity of the rear end 24C of the arm 24 along the longitudinal direction of the arm 24. The elongated hole 28 is provided in the lower end 3 of the headrest stay 30.
0A is slidably engaged.

As shown in FIG. 2, a vertical intermediate portion 30B of the headrest stay 30 is supported by a pair of left and right mounting brackets 32 fixed to the upper side 14C of the seat back frame 14. These mounting brackets 3
2, a through hole 34 is formed substantially in the vertical direction, and a headrest stay 30 is obliquely upwardly forward (in the direction of arrow C in FIG. 2) and obliquely downwardly downward (see FIG. 2).
(In the direction of arrow D).

Therefore, when the upper back 11C of the occupant 11 moves rearward, the upper panel 22 moves rearward, and the arm 2
4 moves counterclockwise in FIG. 2 (direction of arrow A in FIG. 2) about the shaft 26, and the headrest stay 30 moves diagonally forward and upward (direction of arrow C in FIG. 2).

A plurality of engagement grooves 36 as moving amount adjusting means are formed at predetermined intervals along the axial direction on the front side of the outer peripheral portion of the intermediate portion 30B of the headrest stay 30 corresponding to the left mounting bracket 32. The mounting bracket 32 has an engaging claw 38 as a moving amount adjusting means that can be engaged with these engaging grooves 36. The engaging claw 38 is urged by the coil spring 40 toward the side away from the headrest stay 30. The engaging claw 38 is connected to the headrest stay 30 by a wire 42.
Is connected to a push switch 46 as a moving amount adjusting means provided on a headrest 44 provided at the upper end of the headrest. The push switch 46 is connected to the headrest 44
When the head 11D of the occupant 11 comes into contact with the headrest 44, the head 11D of the occupant 11 is pressed by the head 11D. When the push switch 46 is pressed by the head 11D of the occupant 11, the engaging claw 38 moves to the headrest stay 30 side via the wire 42 against the urging force of the coil spring 40, and the engaging groove 36 , To prevent the headrest 44 from moving.

A plurality of engagement grooves 50 are formed at predetermined intervals along the axial direction on the rear surface side of the outer peripheral portion of the headrest stay 30, and the mounting bracket 32 is engaged with these engagement grooves 50. A matable engaging claw 52 is provided inside. The engaging claw 52 is urged by the coil spring 54 toward the headrest stay 30. A rod 56 is connected to the engagement claw 52. The rear end 56A of the rod 56 projects toward the upper rear side of the seat back 12. When the rear end 56A is gripped and the rod 56 is pulled out against the urging force of the coil spring 54, the rod 56 engages with the engaging claw 52. The engagement with the mating groove 50 is released.

The engagement relationship between the engagement claw 52 and the engagement groove 50 is such that the headrest stay 3
When 0 moves obliquely upward and forward, that is, when the headrest 44 moves obliquely upward and forward, the engaging claw 52 retreats against the urging force of the coil spring 54, the engagement is released, and the headrest stay 30 moves. Becomes possible. On the other hand, when the headrest stay 30 moves obliquely rearward and downward with respect to the mounting bracket 32, that is, the headrest 44 moves obliquely rearward and downward, the engagement between the engaging claw 60 and the engaging groove 58 is ensured, and the headrest stay The movement of 44 is prohibited. Therefore, when adjusting the position of the headrest 44 downward, the rod 56 is pulled out rearward.

Next, the operation of the present embodiment will be described. In the seat 10 of the present embodiment, when the own vehicle is hit by another vehicle, the occupant 11 moves rearward with respect to the vehicle. At this time, as shown in FIG. 3, the upper panel 22 is pressed rearward by the upper back 11C of the occupant 11, and the arm 24 is rotated counterclockwise in FIG. ). This rotation causes the arm 24
The headrest stay 30 with the lower end 30A slidably inserted into the long hole 28 moves obliquely upward and forward (in the direction of arrow C in FIG. 2). As a result, the headrest 44 moves obliquely upward on the front side. At this time, the engagement claw 38 is urged by the coil spring 40 toward the side away from the headrest stay 30. Further, the engaging claw 52 retreats against the urging force of the coil spring 54, and the engagement with the engaging groove 50 is released. For this reason, the headrest 44 moves diagonally forward and upward (in the direction of arrow C in FIG. 2), and the head 1 of the occupant 11 moves.
Touch 1D.

The headrest 44 is the head 11D of the occupant 11.
, The push switch 46 is pressed by the head 11D of the occupant 11, and the engaging claw 38 moves to the headrest stay 30 side via the wire 42 against the urging force of the coil spring 40, and It engages with the groove 36 to prevent the headrest stay 30 from moving. As a result, the movement of the headrest 44 stops, and the upper panel 22
Is also stopped, and the movement of the head 11D of the occupant 11 to the rear and the movement of the upper back 11C (chest 11B) to the rear are prevented. That is, based on the stop position of the front surface 44A of the headrest 44, the stop position of the back panel 22, ie,
The upper back 11C of the occupant 11 by the back panel 22 (the chest 1)
The backward movement amount of 1B) is adjusted.

For this reason, for example, when the driving posture of the occupant 11 is such that the upper back 11A is largely offset backward with respect to the head 11D (the upper body is bent forward and the head 11D is forward. In this case, the amount of rearward movement of the upper back 11A until the head 11D comes into contact with the headrest 44 increases. Therefore, by increasing the amount of rearward movement of the upper panel 22 when the headrest 44 abuts on the head 11D, the head 11D and the upper back 11A are maintained in a state where the occupant 11 maintains the driving posture. Can be reliably supported by the headrest 44 and the upper panel 22.

On the other hand, when the driving posture of the occupant 11 is such that the upper back 11A is not so offset rearward from the head 11D (when the upper body is standing and the head 11D is rearward), The amount of rearward movement of the upper back portion 11A until the portion 11D contacts the headrest 44 is reduced. For this reason, by reducing the amount of rearward movement of the upper panel 22 when the headrest 44 abuts on the head 11D, the head 11D can be maintained while maintaining the driving posture of the occupant 11.
And the upper back 11A, the headrest 44 and the upper panel 22
Can be reliably supported.

Therefore, when the head of the occupant abuts on the headrest at the time of a rear collision, a change in the posture of the occupant, that is, a relative displacement between the head and the chest in the front-rear direction can be reduced. Can be effectively supported. [Second Embodiment] A second embodiment of the vehicle seat according to the present invention will be described below with reference to FIGS. In addition,
The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 4, in the present embodiment, the back panel 70 is composed of a plate 72 and an energy absorbing member 74 arranged on the front side of the plate 72. The back panel 70 is provided in a back panel support unit 76 as a moving amount adjusting means provided laterally on the upper portion 14B of the seat back frame 14, and the back panel support unit 7
6 along a pair of left and right guides 76A and 76B, and is movable in the front-rear direction (the direction of arrow E and the direction of arrow F in FIG. 5).

The back panel 70 is urged toward the rear wall 76C of the back panel support unit 76 by urging means such as a spring (not shown).

At both ends of the back panel 70, one ends 7 of wires 78 and 80 as movement amount adjusting means are respectively provided.
8A and 80A are connected. These wires 78,
The other end portions 78B and 80B of the head 80 are connected to the lower end portion 30A of the headrest stay 30, respectively. An intermediate portion of the wires 78 and 80 is connected to two pulleys rotatably supported by the seat back frame 14. 82, 84 are engaged.

As shown in FIG. 5, a vertically intermediate portion 30B of the headrest stay 30 is rotatably supported by shafts 88 of a pair of left and right mounting brackets 86 fixed to the upper side 14C of the seat back frame 14. I have. Headrest stay 30 corresponding to right mounting bracket 86
The intermediate portion 30B has a circular shape in a side view, and a plurality of engagement grooves 90 are formed on the outer peripheral portion at predetermined intervals along the circumferential direction. The mounting bracket 86 is internally provided with an engagement claw 92 that can be engaged with these engagement grooves 90, and the engagement claw 92 is moved by the coil spring 94 inscribed in the mounting bracket 86.
Is biased to the side. Note that a release button 96 provided on the upper portion of the seat back 12 is connected to the engagement claw 92 by a wire, and by pulling the release button 96 to the rear of the seat back, the engagement claw 92 and the engagement groove 90 are formed. Is released.

The engaging relationship between the engaging claw 92 and the engaging groove 90 is determined by the mounting bracket 86 and the headrest stay 3.
0 is the counterclockwise rotation direction (the direction of arrow G in FIG. 5), that is, when the headrest 44 moves substantially forward,
Retreats against the urging force of the coil spring 94, the engagement with the engagement groove 90 is released, and the headrest stay 30 can be rotated with respect to the mounting bracket 86 in the clockwise direction (the direction of arrow H in FIG. 5). That is, when the headrest 44 moves substantially rearward, the engagement between the engagement claw 92 and the engagement groove 90 is ensured, and the rotation is prevented.

Accordingly, when the headrest 44 is moved substantially forward, the headrest stay 30 is rotated in the direction of arrow G, and the upper panel 70 is moved forward (in the direction of arrow E) via the wires 78 and 80, and the release button is pressed. When the headrest 44 is moved substantially rearward with the 96 pulled out to the rear of the seat back, the headrest stay 30 rotates in the direction of the arrow H, and the back panel 70 is moved rearward (by the urging force of the urging means not shown). (In the direction of arrow F).

Next, the operation of the present embodiment will be described. In the seat 10 of the present embodiment, the occupant 11
If the position of the headrest 44 is adjusted when the user sits at 0, the position of the back panel 70 in the front-rear direction changes due to the adjustment. For example, when the headrest 44 is moved substantially forward, the headrest stay 30 rotates in the direction of arrow G in FIG.
Moves forward (in the direction of arrow E in FIG. 5). When the headrest 44 is moved rearward with the release button 96 pulled out to the rear of the seat back, the headrest stay 30 rotates in the direction of arrow H in FIG. The upper panel 70 moves backward (in the direction of arrow F in FIG. 5).

Accordingly, as shown in FIG. 6, when the own vehicle is hit by another vehicle and the occupant 11 moves rearward with the headrest 44 set at the front position, the head 11D of the occupant 11 is moved downward. In a state where the occupant 11 is in the forward position, that is, in a state where the amount of movement of the head 11D to the rear is small, the upper back 11A of the occupant 11A
Are supported by the upper panel 70, and are prevented from moving backward. In a state where the headrest 44 is set to the rear position and the own vehicle is rearranged by another vehicle and the occupant 11 moves rearward, the head 11D of the occupant 11 reaches the rear position, that is, the head When the amount of rearward movement of the portion 11D is large, the upper back 11A of the occupant 11 is
And is prevented from moving backward.

As a result, at the time of a rear collision, the head 11D of the occupant 11
The amount of rearward movement of the occupant's head and the amount of rearward movement of the occupant's chest until the abutment with the headrest 44 are substantially proportional, and the occupant's posture changes, that is, the relative displacement of the head and the chest in the front-rear direction. And effectively support the occupant's head and chest.

In the vehicle seat of the present embodiment, the energy absorbing member 74 provided on the back panel 70 provides
The shock of the occupant's chest can be absorbed.

In the above, the present invention has been described in detail with respect to a specific embodiment. However, the present invention is not limited to such an embodiment, and various other embodiments are included within the scope of the present invention. It is clear to a person skilled in the art that is possible. For example, the vehicle seat of the present invention can be applied to a driver's seat, that is, a passenger seat and a rear seat.

[0038]

According to the first aspect of the present invention, in a vehicle seat having a headrest supported by a seatback, a chest support means provided at a position corresponding to a chest of an occupant in the seatback; Chest support means for occupant chest
Move the headrest toward the occupant's head as the position moves backward.
Headrest moving means to move to the headrest
When it comes into contact with the occupant's head, the headrest
Inhibits movement and behind the occupant's chest by means of chest support
And movement amount adjusting means for preventing movement toward the headrest when the occupant's head comes into contact with the headrest during a rear collision.
However, there is an excellent effect that the occupant's posture variation can be reduced and the occupant's head and chest can be effectively supported.

The present invention according to claim 2 provides a seat back
Vehicle seat with headrest supported by
At the position corresponding to the occupant's chest in the seat back
Chest support means and the occupant chest support position of the chest support means
The headrest moves toward the occupant's head as the
Headrest moving means to move and in front of the headrest
Based on the rear adjustment position, the front and rear position of the chest support means and the chest
Movement to adjust the amount of back movement of the occupant's chest by the support means
And the momentum adjusting means, the rearward movement of the occupant's head until the occupant's head comes into contact with the headrest at the time of a rear collision
The amount of movement and the amount of backward movement of the occupant's chest are substantially proportional, and there is an excellent effect that the occupant's head and chest can be effectively supported.

[0040]

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a vehicle seat according to a first embodiment of the present invention, which is partially obliquely viewed from a diagonally front part of a cross section.

FIG. 2 is a side sectional view showing a main part of the vehicle seat according to the first embodiment of the present invention.

FIG. 3 is a side sectional view showing a rear collision state of the vehicle seat according to the first embodiment of the present invention.

FIG. 4 is a perspective view showing a main part of a vehicle seat according to a second embodiment of the present invention, as viewed obliquely from the front of the vehicle.

FIG. 5 is a side sectional view showing a main part of a vehicle seat according to a second embodiment of the present invention.

FIG. 6 is a side sectional view showing a rear collision state of a vehicle seat according to a second embodiment of the present invention.

FIG. 7 is a schematic side view of a vehicle seat according to a conventional embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vehicle seat 12 Seat back 14 Seat back frame 22 Back panel (chest support means) 24 Arm (headrest moving means) 30 Headrest stay 36 Engagement groove (movement amount adjustment means) 38 Engagement claw (movement amount adjustment means) 44 Headrest 46 Push switch (moving amount adjusting means) 70 Back panel (chest supporting means) 76 Back panel supporting unit (moving amount adjusting means) 78 Wire (moving amount adjusting means) 80 Wire (moving amount adjusting means)

Continuation of front page (56) References JP-A-7-291005 (JP, A) JP-A-4-197840 (JP, A) JP-A-10-6832 (JP, A) JP-A-7-1842 (JP, A) , U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B60N 2/42 A47C 7/38 B60N 2/48 B60R 21/02

Claims (2)

(57) [Claims] 1. A vehicle seat provided with a headrest supported by a seatback, comprising: a chest support means provided at a position corresponding to a chest of an occupant in the seatback; and an occupant chest support position of the chest support means. With backward movement
Not move the headrest toward the occupant's head.
And dressed moving means, when the headrest is in contact to the rider's head, said head
It prevents the rest from moving toward the occupant's head and
And a moving amount adjusting means for preventing the occupant's chest from moving backward by the supporting means . 2. A headrest supported by a seat back.
The vehicle seat provided with at the position corresponding to the occupant's chest in the seat back
Chest support means and the occupant chest support position of the chest support means moving backward.
Not move the headrest toward the occupant's head.
The chest part is moved based on a drest moving means and a front / rear adjustment position of the headrest.
The front and rear positions of the support means and the occupant chest by the chest support means
And a moving amount adjusting means for adjusting a moving amount of the vehicle rearward .