JP2000217660A - Automobile backrest - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a member supporting a pressure receiver member from providing a sensation of foreign matter to a driver even if the pressure receiving member moves backly supporting the pressure receiving member that can move rearward with a link arranged rotatably in a position except the end of a bar- form member straddling horizontally the side ends of a backrest frame. SOLUTION: If a driver 30 seated in an automobile collided from behind, is pushed back by a secondary collision and a pad or the like moves rearward, the back 30a of the driver 30 pushes back the pressure receiver member 6 through the pad or the like. Even if a rearward load due to the driver 30 moves the pad or the like, the shoulder point 31 of the driver 30 is at least that due to an AFO 50% title mannequin, the pad or the like does not penetrate into an armature pipe 7. As the pressure receiver member 6 is held by a link 16, if the pressure receiver member 6 moves by pushing rearward, the link 16 rotates rearward and upward around a bar-shaped member 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat back, and more particularly to a vehicle seat back structure for protecting a passenger's cervical vertebrae when the vehicle is hit.

[0002]

2. Description of the Related Art As a conventional seat back (3) for an automobile, as shown in International Patent Publication No. 98/09838, a seat back frame (9) and front and rear portions at the upper end of the seat back frame (9) are known. A supporting means (5) supported so as to be rotatable and movable up and down, and a stay (27) at an upper end of the supporting means (5).
A headrest (4) supported movably up and down via a headrest holder (not shown) mounted on the
A pressure receiving member (10) supported by the lower end of the support means (5) and movable by receiving the pressure on the back of the occupant;
And the pressure receiving member (10) is attached to the seat back frame (9).
A link member (11) rotatably supported on the pressure receiving member (10) and a pressure receiving member (10) biased to the front side when a load from the front side to the rear side from the occupant is not applied to the pressure receiving member (10). It comprises at least a coil-shaped spring (16), a back element (20) suspended between the seat back frames (9), and a pad disposed on the front side of the back element (20). Become.

[0003] Therefore, for example, when the vehicle is collided, an impact load is applied to the seat back (3) toward the front first, and then a reaction load due to a secondary collision by the occupant. Acts toward the back. That is, the back element (2) erected between the seat back frames (9)
0) and the pressure receiving member (10). At that time, the pressure receiving member (10) moves rearward,
When the lower end of the support means (5) moves rearward and upward, the headrest (4) supported by the upper end of the support means (5) is moved to the upper side (2) of the seat back frame (9).
4) With the rotation fulcrum as a pivot point, it pivots forward and moves upward to operate in a direction approaching the occupant's head.

[0004] Therefore, with this configuration, when the own vehicle is collided, the seat back (3) is caused by the recoil load of the occupant.
The headrest (4) instantaneously approaches the occupant's head even if is bent backward, so that the occupant's head is securely received by the headrest (4), and the occupant's cervical spine is protected. .

[0005]

However, in such a conventional technique, when a load on the rear side of the occupant is applied to the pressure receiving member (10), the pressure receiving member (10) is located on the rear side. When moving, the link member (11) rotatably supporting the pressure receiving member (10) may give a foreign body feeling to the rear flanks of the occupant via the pad. This will have a negative impact on ride quality. Further, the configuration of the occupant cervical vertebra protection means described above is complicated and composed of many parts, which causes a rise in cost.

The present invention has been made by paying attention to such a conventional technique. Even if a load is applied to the rear side of the occupant and the pressure receiving member moves rearward, a member for supporting the pressure receiving member is provided. It is intended to provide an automobile seat back for the purpose of reducing costs by not giving the occupant the sensation of foreign matter due to the above and simplifying the structure.

[0007]

According to a first aspect of the present invention, there is provided a seat back frame having a substantially vertical shape which is supported by an upper end portion of the seat back frame so as to be rotatable back and forth and movable up and down. A support means, a headrest disposed at an upper end of the support means, and a rear end supported by the lower end of the support means and moved rearward by receiving pressure from a back of an occupant due to a secondary collision at the time of a rear-end collision; A possible pressure receiving member, and an automotive seat back comprising at least urging means for urging the pressure receiving member forward, wherein the pressure receiving member is provided between the side end portions of the seat back frame. It is supported by a link rotatably disposed at a position other than the end of the bar-shaped member that is laid horizontally.

According to a second aspect of the present invention, there is provided a seat back frame, a substantially vertical support means rotatably supported on an upper end portion of the seat back frame in a forward and backward direction and vertically movable; A headrest disposed at the upper end of the means, and a pressure receiving member supported by the lower end of the support means and capable of being moved rearward by receiving the pressure of the occupant's back due to a secondary collision at the time of a rear-end collision, An automobile seat back comprising at least urging means for urging the pressure receiving member to the front side, wherein one end of a link is rotatably supported at a side end of the pressure receiving member. The other end of the link is rotatably supported by a side end of the seat back frame, and the one end and the other end of the link are bent at positions other than the one end. Make a link.

According to a third aspect of the present invention, there is provided the automobile seat back according to the first or second aspect, wherein the urging means is provided between the side end of the seat back frame and the link. And a coil-shaped spring suspended from the coil spring.

According to a fourth aspect of the present invention, there is provided the automobile seat back according to the first aspect, wherein the urging means is formed of a torsion coil spring wound around the rod-shaped member.

[0011]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Note that FR is described as a front side, RR is a rear side, UP is an upper side, and LWR is a lower side.

FIGS. 1 to 4 show a first embodiment of the present invention, wherein reference numeral 1 denotes an automobile seat back, and reference numeral 3 denotes a headrest.

The seat back 1 includes a seat back frame 2 made of an iron plate, a plurality of S-shaped springs 11 bridged between side frames 2b and 2b 'of the seat back frame 2 described below, and an S-shaped spring. 11, a pad (not shown) formed of polyurethane foam or the like and a skin (not shown) made of cloth or the like covering the pad.

The seat back frame 2 is formed in a substantially horizontal shape and has an upper frame 2a formed with a back member 4 hanging down from the rear side RR, and is hung down from left and right ends of the upper frame 2a. Frame (side end portion) 2 which is arranged in a substantially symmetrical shape and arranged at
b, 2b 'and an underframe 2c spanned between lower ends of the side frames 2b, 2b'.
Mutually supported by welding SW.

On the front FR surface of the back member 4, an armature holder 5 for holding the armature pipes 7, 7 as supporting means in a freely movable manner so as to be able to move up and down and rotate back and forth is provided at an appropriately spaced position. Be arranged.

The lower end 7 of the armature pipes 7, 7
The arrangement position of the pressure receiving member 6 bridged to b and 7b is near the back 30a of the occupant 30, and is a position easily pressed by the rear side RR due to the behavior of the occupant 30 described later. The pressure receiving member 6 is formed in a rectangular shape extending right and left by a rigid body such as an iron plate.

The holding part 5 of the armature holder 5
Since a ring (not shown) made of synthetic resin is built in each of the insides a and 5a, no rubbing noise or the like occurs when the armature pipes 7 move.

The armature pipes 7, 7 are arranged side by side on the left and right as viewed from the front, and form a vertical shape. The holding position of the armature pipes 7, 7 is at least AF0 in the front view.
It is arranged on the center side of the shoulder point of the 5% tile mannequin (SAE). It is located on the center side of the shoulder point of the AF05% tile mannequin (SAE). This means that most occupants of the adult physique 30
Armature pipes 7, 7 are arranged inside the shoulder point 31 of the vehicle, and the rear-end collision of the own vehicle causes the load by the occupant 30 from the front FR of the seat back frame 2, that is, the occupant 30 Even when pressed against the back 1, the shoulder point 31 on the back 30 a of the occupant 30 is
Will not interfere.

Further, the rear portions of the armature pipes 7, 7 are, as viewed from the side as shown in FIG.
It is formed to be bent in the shape of a "ku". The bent portion 7a
Lower ends 8 of stays 8 supporting the headrest 3
a, 8a are formed close to each other so as not to interfere with each other,
The inner surface of the bent portion 7a is a curved surface having a radius of 20 mm.

As described above, the headrest holders 9, 9 which support the stays 8, 8 of the headrest 3 so as to be vertically slidable are provided in the upper end portions 7c, 7c of the armature pipes 7, 7, respectively. Be arranged.

Reference numeral 10 denotes the seat back frame 2.
The stopper 10 is made of a rubber material and held so as to determine the positions of the rear surfaces of the armature pipes 7 and 7.

The two ends of the pressure receiving member 6 are shown in FIGS.
As shown in FIG. 7, flanges 6a and 6a 'are formed on the rear side RR. The flange 6a, 6a 'has a link 1
6 is rotatably supported by a pin 17 at its upper end 16a. The lower end 16b of the link 16 is
Are rotatably disposed at left and right positions except for both end portions 15a and 15a '. Both ends 15a, 1 of the rod-shaped member 15
5a 'are members 2ba, 2b projecting toward the center of the side frames 2b, 2b' of the seat back frame 2.
It is horizontally mounted by welding EW between the surfaces of the rear side RR of a ′.

The pressure receiving member 6 is connected to the link 16 of the pressure receiving member 6 and the side frames 2b, 2b 'of the seat back frame 2 at a predetermined position, that is, through the armature pipe 7 to the pressure receiving member 6. A return spring (biasing means) 18 which is a coil-shaped spring that is biased so that the connected headrest 3 can be held at a neutral position (the position shown in FIG. 2) is suspended. . Reference numerals 2bb and 2bb ′ are used to suspend the return springs 18 so as to suspend the side frames 2b and 2bb.
This is a through hole formed in b ′.

Next, the operation according to this embodiment will be described.

As shown in FIG. 2, when the occupant 30 is seated on a seat cushion (not shown) of the seat, the back 30a rests on the seat back 1 and is supported by the S-shaped spring 11, 30 heads 3
0b and the headrest 3 have a slight gap 32, and a small gap 33 is formed between the back 30a of the occupant 30 and the pressure receiving member 6. Although a pad and a skin member (not shown) are interposed between the back 30 a of the occupant 30 and the pressure receiving member 6, the load from the occupant 30 is not applied to the pressure receiving member 6.

In this state, when the own vehicle is collided and the seated occupant 30 is pushed by the rear RR due to the secondary collision and the pad or the like moves to the rear RR, the back 30a of the occupant 30
As a result, the pressure receiving member 6 is pushed toward the rear side RR via a pad or the like. Due to the load in the rear RR direction by the occupant 30,
Even if the pad or the like moves to the rear side RR, the pad or the like does not bite into the armature pipe 7 because the shoulder point 31 of the occupant 30 is at least the shoulder point of the AF05% tile mannequin. For this reason, the rising UP caused by the rotation of the armature pipe 7 is not hindered,
The operation amount of the headrest 3 can be sufficiently ensured.

Since the pressure receiving member 6 is held by the link 16, when the pressure receiving member 6 is pushed and moved by the rear side RR, the link 16 rotates around the rod-shaped member 15, and the rear side RR and the upper side RR. It is rotated to UP. Due to the rotation, the upper end of the armature pipe 7, that is, the headrest holders 9, 9, center on the armature holder 5,
It rises to the upper side UP and the front side FR. Due to the upward movement, the stay 8 of the headrest 3 is also moved to the upper side UP and the front side FR.

The pressure receiving member 6 is located at a position excluding the ends 15a and 15a 'of the bar-like member 15 which is laid between the side frames 2b and 2b' of the seat back frame 2, that is, the pressure receiving member 6 and the side flap 30c of the occupant 30. Since it is supported by the link 16 rotatably disposed at a position where it does not interfere, when the load on the rear RR of the occupant 30 is applied and the pressure receiving member 6 moves to the rear RR, the pressure receiving member 6 is moved. Since it does not interfere with the supporting link 16, a foreign object sensation is not given to the side of the occupant. Further, the cost can be reduced by simplifying the structure.

As described above, the headrest holders 9, 9 are arranged such that the upper
Further, since the headrest 3 is supported by the stays 8 and 8, the headrest 3 supported by the stays 8, as shown in FIG.
Abuts on the head 30b. In FIG. 4, the headrest 3 is illustrated as biting into the head 30 b of the occupant 30, but the headrest 3 is depressed at the center in the left and right direction, and the head 30 b of the occupant 30 is also cross-sectionally known. It is not a bite because it is almost cylindrical.

In this way, the back 30a of the occupant 30 moves to the rear side RR, so that the head 30b of the occupant 30 that is left behind can be reliably held by the movement of the headrest 3. In this state, the rear surface of the armature pipe 7 moves forward with respect to the pressure receiving member 6.
When the pressure receiving member 6 moves to the rear side RR, the pressure receiving member 6 does not protrude to the rear side RR as shown in FIG. become.

The headrest holders 9, 9
In addition, since the stays 8, 8 of the headrest 3 are supported so as to be able to move up and down, the heads 3 of the occupants 30 having different physical sizes are
The headrest 3 can be appropriately adjusted to the position of 0b.

The return spring 18 is a coil-shaped spring suspended between the side frames 2b and 2b 'of the seat back frame 2 and the link 16, so that the pressure receiving member 6 is moved. The spring to be pulled, that is, the return spring 18 avoids the flank 30c of the occupant 30 and reduces the feeling of foreign matter by the flank 30c of the occupant 30.
Never give to.

In the above description of operation, the head 30b of the occupant 30
Although it is assumed that the headrest 3 is securely held by the movement of the headrest 3, the movement of the headrest 3 and the movement of the seatback 1 are relative, and the seatback 1 is moved backward by the back 30a of the occupant 30. Even if it moves to RR, the headrest 3 does not move with respect to the head 30b of the occupant 30,
This also includes a description that the head 30b of the occupant 30 is protected by being held at that position.

FIG. 5 shows both ends 15 of the rod-shaped member 15.
a and 15a 'show another embodiment in which both ends 15a and 15a' of the rod-shaped member 15 project toward the center of the side frames 2b and 2b 'of the seat back frame 2. E on the front FR surface of
It may be one that is laid horizontally by W.

FIGS. 6 and 7 show still another embodiment of both ends 15a and 15a 'of the rod-like member 15. FIG.
Both ends 15a, 15a 'of the rod-shaped member 15 are crushed back and forth to be thin, and through-holes 15c, 15c' are formed in the crushed surfaces 15b, 15b '. The members 2ba, 2ba 'projecting toward the center of the frames 2b, 2b' are laterally suspended by being screwed to a nut 20 supported by the members 2ba, 2ba 'by bolts 19 on the rear RR surface. It may be something.

FIGS. 8 to 11 show another embodiment of the urging means, wherein the urging means comprises:
5, one end 21a of the torsion coil spring 21 is supported by a boss 22 protruding from the rod member 15, and the torsion coil spring 2
The other end 21b of 1 is always urged to the front side FR by being hooked on a stopper 16c (FIG. 11) which protrudes from the upper and lower middle position of the link 16. Reference numeral 16d is a through hole formed so that the pin 17 formed in the upper end 16a can move. Reference numeral 16e is a through hole formed in the lower end 16b. Reference numeral 23 denotes a bush made of a synthetic resin for preventing generation of abnormal noise when the link 16 rotates.

According to this configuration, since the torsion coil spring 21 is formed of the torsion coil spring 21 wound around the rod-shaped member 15, the torsion coil spring 21 is tightened by moving the pressure receiving member 6. The torsion coil spring 21
The foreign body sensation is not given to the flank 30c of the occupant 30 because the flank 30c is avoided.

FIGS. 12 to 16 show a second embodiment of the present invention. The main difference from the first embodiment is the link structure. That is, one end 35 of the link 35 is attached to the flanges 6a, 6a at the side ends of the pressure receiving member 6.
a is rotatably supported by a bracket 38 supported by screwing a bolt 36 to a nut 37. The other end 35b of the link 35 is connected to the side frames 2b, 2b 'of the seat back frame 2. It is rotatably supported, and has one end 35a and the other end 3 of the link 35.
5b, the position excluding the one end 35a is bent to form a link.

The return spring 18 is suspended between one end 35a of the link 35 and the side frames 2b, 2b 'of the seat back frame 2.

According to the second embodiment, the flanges 6a, 6a at the side ends of the pressure receiving member 6 are provided with the links 35.
One end 35a of the link 35 is rotatably supported, and the other end 35b of the link 35 is rotatably supported by the side frames 2b, 2b 'of the seat back frame 2, and one end of the link 35 The link 35a and the other end 35b are bent at a position excluding the one end 35a, that is, at a position not interfering with the flanks 30c of the occupant 30, so that a load is applied to the rear RR of the occupant 30. When the pressure receiving member 6 moves to the rear side RR, the foreign body does not interfere with the link 35 supporting the pressure receiving member 6, so that a foreign body sensation is not given to the flank 30 c of the occupant 30. Further, the cost can be reduced by simplifying the structure.

[0041]

According to the first aspect of the present invention, the pressure receiving member is located at a position excluding an end of a rod-shaped member which is laterally suspended between the side ends of the seat back frame, that is, the flank of the occupant. Is supported by a link that is rotatably disposed at a position that does not interfere with the occupant, so that when a load is applied to the rear side of the occupant and the pressure-receiving member moves rearward, it does not interfere with the link that supports the pressure-receiving member. As a result, no foreign-body sensation is imparted to the side of the occupant. In addition, by simplifying the structure,
Cost reduction can be achieved.

According to the second aspect of the present invention, one end of a link is rotatably supported at the side end of the pressure receiving member, and the other end of the link is connected to the seat back frame. Since one end and the other end of the link are bent at a position excluding the one end, that is, at a position that does not interfere with the flank of the occupant, a link is formed. When a pressure is applied to the rear side of the occupant and the pressure receiving member moves rearward, the pressure receiving member does not interfere with the link supporting the pressure receiving member. Further, the cost can be reduced by simplifying the structure.

According to the third aspect of the present invention, the urging means is formed of a coiled spring suspended between the side end of the seat back frame and the link. The spring that is pulled by being moved does not give a foreign body feeling to the occupant's flanks, because the spring avoids the occupants' flanks.

According to the fourth aspect of the present invention, the urging means is formed of a torsion coil spring wound around the rod-shaped member. , Avoiding the crew's side,
There is no foreign body sensation on the side of the occupant.

[Brief description of the drawings]

FIG. 1 is a front view showing the periphery of a frame of a seat back according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line SA-SA of FIG. 1;

FIG. 3 is a perspective view around a frame of a seat back excluding a headrest in FIG. 1;

FIG. 4 is a sectional view showing the operation embodiment of FIG. 2;

FIG. 5 is a side view showing another embodiment of the support position of the rod-shaped member of FIG. 1;

FIG. 6 is a front view showing another embodiment of the means for supporting the rod-shaped member of FIG. 1;

FIG. 7 is an exploded perspective view of FIG. 6;

FIG. 8 is a perspective view showing another embodiment of the urging means of FIG. 3;

FIG. 9 is a side view of FIG. 8;

FIG. 10 is a sectional view taken along the line SB-SB in FIG. 9;

FIG. 11 is a perspective view of a single piece of the link of FIG. 8;

FIG. 12 is a front view showing the periphery of a frame of a seat back according to a second embodiment of the present invention.

FIG. 13 is a sectional view taken along the line SC-SC of FIG. 12;

14 is a perspective view of the periphery of a frame of a seat back excluding a headrest in FIG. 12;

FIG. 15 is an exploded perspective view of a support portion of the link in FIG. 14;

FIG. 16 is a sectional view showing the operation embodiment of FIG. 13;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat back 2 Seat back frame 2a Upper frame 2b Side frame (side end) 3 Headrest 5 Armature holder 6 Pressure receiving member 7 Armature pipe as supporting means 8 Stay 9 Headrest holder 15 Rod member 16, 35 Link 18 Return spring (with 21 torsion coil spring (biasing means) 30 occupant 30a occupant's back 30b occupant's head 30c occupant's flank FR front side RR rear side UP upper side LWR lower side

Claims (4)

[Claims] 1. A seat back frame, a substantially vertical supporting means rotatably movable back and forth at the upper end of the seat back frame and movably up and down, and disposed at an upper end of the supporting means. A pressure receiving member that is supported by the lower end of the support means and that can be moved rearward by receiving the pressure of the occupant's back due to a secondary collision at the time of a rear-end collision; and An automotive seat back comprising at least biasing means for biasing, wherein the pressure receiving member is located at a position excluding an end of a rod-shaped member that is laterally bridged between side ends of the seat back frame. An automobile seat back characterized by being supported by a link rotatably disposed on the vehicle. 2. A seat back frame, a substantially vertical support means rotatably movable back and forth at the upper end of the seat back frame and movably up and down, and disposed at the upper end of the support means. A pressure receiving member that is supported by the lower end of the support means and that can be moved rearward by receiving the pressure of the occupant's back due to a secondary collision at the time of a rear-end collision; and An automobile seat back comprising at least biasing means for biasing, wherein one end of a link is rotatably supported at a side end of the pressure receiving member, and the other end of the link is provided. The portion is rotatably supported at a side end of the seat back frame, and the link has one end and the other end bent at a position excluding the one end to form a link. And automotive Back. 3. The vehicle seat back according to claim 1, wherein said biasing means is coil-shaped and suspended between a side end of said seat back frame and said link. An automotive seat back comprising a spring. 4. The vehicle seat back according to claim 1, wherein said urging means comprises a torsion coil spring wound around said rod-shaped member.