JPH053812A - Seat for vehicle - Google Patents

Abstract

PURPOSE:To provide a seat reclining device on one side and an emergency locking device on the other side. CONSTITUTION:The emergency locking device S2 is constituted of an upper tooth 10, a lock limiting plate 20, an arm 30 and the lower tooth 40 and the upper tooth 10 is supported pivotally to a seat back fitting shaft 51 provided projectingly on a base plate 50 and in the upper part of a pivotally supporting part 11, a connecting shaft 11 connected to a seat reclining device S1 is implanted. The lock limiting plate 20 is superposed on the upper tooth 10, supported pivotally to the seat back fitting shaft 51 so as to be movable vertically, forms an engaging hole 22 and is always positioned in the lower part than the upper tooth 10. The arm 30 is superposed on the lock limiting plate 20 and attached to the shaft 51, and an engaging pin 32 engaged with the engaging hole 22 of the lock limiting plate 20 is implanted. As for the lower tooth 40, the base part is supported pivotally to the base plate 50 and on the free end side, a tooth part 40a which can be engaged with a tooth part 10a is formed, and it is energized to the upper tooth 10 side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat in which a seat reclining device is provided on only one side of a seat and the other side is a free hinge. The present invention relates to a vehicle seat provided with an emergency lock device that can lock a side seat back.

[0002]

2. Description of the Related Art Generally, as a seat reclining device for adjusting the inclination angle of a seat back of a vehicle seat, the inclination angle of the seat back is kept constant by the engagement between the teeth of the upper part and the teeth of the lower tooth. , Latch-type stepped adjustment device that can change the seat back inclination angle by changing the meshing position of the lower tooth part with the upper part tooth part, and the gear arranged on the pivot part of the seat back and seat cushion The Taumel mechanical stepless adjustment device that keeps the seat back inclination angle constant by meshing with each other and finely adjusts the seat back inclination angle by rotating the gears, and a device that uses these two types in combination Are known.

By the way, in a vehicle seat of a so-called cantilever seat reclining device in which the seat reclining device described above is provided only on one side of the seat, since the other side of the seat is a free hinge, an impact load or the like acts. In an emergency, there is a risk that the seat back cannot be held sufficiently.

That is, in the event of an emergency such as a sudden start of the vehicle or a collision, the impact causes a load to be applied to the seat back in the front-rear direction via the occupant. In such a case, one side of the seat back is firmly locked by the seat reclining device, but the other side is not locked by the free hinge, so that it is twisted in the front-rear direction due to the load, so that the seat back is sufficiently locked. He could not hold it, and he was concerned about the safety of the passengers.

Therefore, as means for solving the above-mentioned problems, seat reclining devices are provided on both sides of the seat,
There is known a vehicle seat equipped with a so-called double-sided seat reclining device in which these are linked by a connecting rod or a connecting wire.

[0006]

However, in the vehicle seat equipped with the conventional double-sided seat reclining device described above, since the seat back is supported on both sides, this seat has excellent load bearing performance. When operating the operating lever of the seat reclining device provided on one side to adjust the seat back to the desired tilt angle, the operating force of the operating lever is accurately transmitted to the seat reclining device on the other side. Therefore, there is a problem that not only a large force is required to operate the operation lever, but also synchronization failure and a seat back phase shift are likely to occur during operation.

Further, since the structure of the double-sided seat reclining device is required to have high accuracy and the number of parts is increased, there is a problem that the cost is considerably increased.

The present invention has been made to solve the above-mentioned problems of the prior art, and its purpose is to:
In a vehicle seat having a seat reclining device provided on one side of a seat back, the tilt of the seat back on the other side can be locked in an emergency.

[0009]

In order to achieve the above object, in the vehicle seat of the present invention, the seat back is tiltably supported on both sides of the seat cushion, and the tilt angle of the seat back is supported by the support portion on one side. While arranging a seat reclining device for adjusting, a vehicle seat in which an emergency lock device for locking a seat back in an emergency is arranged on the support portion on the other side, wherein the emergency lock device is an upper part lock, a lock limiting plate, The upper part is composed of an arm and a lower tooth, and the upper part is axially mounted on a seat back mounting shaft protruding from a base plate fixed to the other side of the seat cushion, and the seat reclining device is mounted above the shaft mounting portion. A connecting shaft that fits with the connecting rod that is linked to While being axially attached to the seatback mounting shaft so as to be vertically movable by being superposed on the upper part suspension, a mountain-shaped engaging hole is formed below the shaft mounting portion and is normally located below the upper part suspension. Further, the arm is axially attached to the seat back mounting shaft so as to be superposed on the lock limiting plate and displaceable, and an engaging pin which engages with an engaging hole of the lock limiting plate is planted below the axial attaching portion. In addition, the lower tooth is characterized in that the base portion is pivotally attached to the base plate, a tooth portion capable of meshing with the tooth portion of the upper part is formed on the free end side, and further biased to the upper part side. ..

[0010]

According to the above construction, the seat back on the other side, which is normally a free hinge, can be locked only in an emergency when the vehicle receives a collision load or the like. That is, in an emergency, the lower end edge surface of the lock limiting plate located below the tooth portion of the upper part moves upward due to the cooperative action of the engagement pin and the engagement hole of the lock limiting plate due to the torsional displacement of the arm. .. As a result, the tooth portion of the lower tooth and the tooth portion of the upper part are engaged with each other, and the seat back on the other side can be locked.

Therefore, according to the vehicle seat of the present invention, the seat back on the other side can be reliably locked only in an emergency, and the safety of the occupant in an emergency can be improved together with the locking effect on the one side. be able to.

Further, since the cantilever seat reclining device is normally used, it is possible to eliminate the poor synchronization and the phase shift of the seat back at the time of operation, which are problems in the conventional double-supporting seat reclining device. Moreover, the number of assembling steps can be significantly reduced, and the weight and cost can be reduced.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in the drawings.

1 to 7 relate to a first embodiment of the present invention, FIG. 1 is a schematic perspective view of a vehicle seat, FIG. 2 is a front view of an emergency lock device, and FIG. 3 is a front view of an upper part. 4 and 5 are front explanatory views of the lock limiting plate, and FIG.
Is a front explanatory view of the arm, FIG. 6 is a front explanatory view of the lower tooth, and FIG. 7 is an operation explanatory view of the emergency locking device at the time of locking.

In the figure, S is a vehicle seat, which supports the seat backs S and B on both sides of the seat cushions S and C so as to be tiltable, and the seat back S on one side support portion.
・ Seat reclining device S that adjusts the inclination angle of B
1 is arranged, and an emergency lock device S2 for locking the seat back is arranged on the support portion on the other side only in an emergency.

The present invention is particularly applicable to the emergency lock device S.
2 are upper parts 10, lock limiting plates 20,
The upper part 10 is composed of an arm 30 and a lower tooth 40. The upper part 10 is axially mounted on a seat back mounting shaft 51 projecting from a base plate 50 fixed to the other side of the seat cushions S and C, and the shaft mounting part 11 is also provided.
A connecting shaft 12 that fits into a connecting rod 60 that is linked to the seat reclining device S1 is planted above.

The lock limiting plate 20 overlaps with the upper parts 10 and is axially mounted on the seat back mounting shaft 51 so as to be vertically movable, and a mountain-shaped engaging hole 22 is formed below the shaft mounting portion 21. It is normally located below the upper part.

Further, the arm 30 overlaps with the lock limiting plate 20 and is axially attached to the seat back mounting shaft 51 so as to be displaceable, and is engaged with the engagement hole 22 of the lock limiting plate 20 below the axial attachment portion 31. The engaging pin 32 which does is planted.

Further, the lower tooth 40 has a base portion axially attached to the base plate 50 and has a tooth portion 40a which can be meshed with the tooth portion 10a of the upper spout 10 on the free end side.
Furthermore, it is urged to the upper part 10 side.

Next, the structure of the first embodiment of the present invention will be described in more detail.

The vehicle seat S is a seat cushion S.
On one side of C, a known seat reclining device S such as the above-described latch type stepped adjusting device, Taumel mechanism stepless adjusting device, and a device using these two types in combination.
1 and an emergency lock device S2 on the other side, respectively. By operating the operation lever 61 of the seat reclining device S1, the seat backs S and B can be tilted at a desired inclination angle with respect to the seat cushions S and C. It is configured to be adjustable.

The upper part 10 has a shaft mounting hole 11 which is a shaft mounting portion formed in an intermediate portion and is fitted into the seat back mounting shaft 51, and the lower edge thereof has the center P of the shaft mounting hole 11 as a center. An arcuate tooth portion 10a having a radius R is formed.
In addition, above the shaft attachment hole 11 of the upper part 10, a connecting rod 60 linked to the seat reclining device S1 is provided.
A connecting shaft 12 that is fitted into a round hole formed in the base plate 50 is planted.
Is inserted into the long hole 52 formed over the tilting range of
It projects from the base plate 50. Further, the shaft mounting hole 1
1, a pair of guide pins 13 are planted on the circumference centered on the center P of the shaft attachment hole 11 at predetermined intervals.

The lock limiting plate 20 has a shaft mounting hole 21 which is a shaft mounting portion extending in the up-down direction and having an upper arc portion 21a, a lower arc portion 21b, and a straight portion 21c connecting the arc portions 21a and 21b above the lock limiting plate 20. The seat back mounting shaft 51 is inserted into the shaft mounting hole 21.
A pair of mountain-shaped engaging holes 22 are formed below the shaft attaching holes 21 and extend vertically so that the guide pins 13 of the upper parts 10 are inserted on both sides of the engaging holes 22. Guide holes 23 are formed respectively. Furthermore, an arcuate lock limiting surface 24 having a radius R ₁ centered on the center P ₁ of the upper arc portion 21 a is formed at the lower edge of the lock limiting plate 20, and the radius R ₁ is the tooth of the upper part tooth 10. The radius R of the portion 10a is set to be substantially the same.

In the arm 30, a seat back mounting shaft 51 is fitted and inserted into a shaft mounting hole 31 which is a shaft mounting portion formed below the arm 30, and the lock limiting plate 20 is engaged below the shaft mounting hole 31. An engagement pin 32 that engages with the hole 22 is implanted. Further, an elongated hole 33 into which the connecting shaft 12 of the upper part 10 is loosely fitted is formed above the shaft attachment hole 31.

The base of the pair of lower teeth 40 is pivotally mounted on the pivot 41 fixed to the base plate 50, and the upper end of the free end thereof has a tooth portion capable of meshing with the tooth portion 10a of the upper part tooth 10. 40a is formed. An abutting member 42 is superposed and integrally fixed to the lower tooth 40, and an abutting member 42 that can abut against the lock limiting surface 24 of the lock limiting plate 20 at an upper edge portion of the abutting member 42 on the free end side. The part 42a is formed. Further, both end hook portions of the tension spring 43 are locked to the spring attachment portion 42b projecting downward from the free end side of each abutting member 42, and the tension spring 43 causes the lower tooth 40 to move to the upper part 10 side. It is urged to rotate.

The arm 30 is provided outside the arm 30.
And a holder plate 53 fixed to the seat back attachment shaft 51 and the pivot shaft 41 so as to sandwich the contact member 42.
Are arranged.

Next, the operation of the first embodiment of the present invention will be described.

At normal times, as shown in FIG. 2, the tension spring 43
The abutting portion 42a of the abutting member 42 abuts on the lock limiting surface 24 of the lock limiting plate 20 by the spring force in the directions of arrows A and B due to the tooth portion 40a of the lower tooth 40a.
Is not in mesh with the tooth portion 10a of the upper part 10 and is in a free hinge state. Also, the arm 30
The engagement pin 32 of the lock limiting plate 20
It engages with the central part of 2.

In this state, the seat reclining device S1
When the seat back S / B is tilted by releasing the lock of the seat back S / B, the connecting shaft 12 moves in the direction of arrow CD through the connecting rod 60, and the back frame of the seat back S / B tilts. Along with this, the upper parts 10, the lock limiting plate 20, and the arm 30 move integrally in the same direction, whereby the normal inclination angle of the seat backs S and B can be adjusted.

By the way, in a seated state in which the seat backs S and B are locked, in an emergency such as a sudden start or collision of the vehicle, the impact causes the seat backs S and B through the occupant.
A front-back load is applied to B. In this case, the arm of the seat reclining device S1 is locked, whereas the arm 30 on the free hinge side is not locked, so that the arm 30 is twisted and displaced. For example, as shown in FIG. 7, when the arm 30 undergoes torsional displacement in the direction of arrow C, the engagement pin 32 rotates in the direction of arrow E with this displacement.

By this rotation, the lock limiting plate 2
0 rises along the guide pin 13 and reaches the top dead center at the position where the engagement pin 32 moves near the left end of the engagement hole 22.
Then, as shown in FIG. 7, from the lock limiting surface 24 of the lock limiting plate 20 to the tooth portion 10a of the upper part 10
Is projected, and the tooth portion 40a of the lower tooth 40 is pressed and meshed with the tooth portion 10a by the spring force of the tension spring 43. This ensures that the tilt of the arm 30 can be locked.

When the impact load is removed in an emergency, the rigidity of the back frame causes the arm 30 to rotate in the direction of arrow D and the torsional displacement of the arm 30 disappears. Then, the engagement pin 32
Rotates in the direction of arrow G, the lock limiting plate 20 descends with this rotation, and the lock limiting surface 24 presses the contact portion 42a of the contact member 42, so that the lower tooth 40 moves downward. The tooth portion 40a of the lower tooth 40 and the tooth portion 10a of the upper part 10 are disengaged from each other, and the free hinge state is established again.

When the arm 30 is twisted in the direction of arrow D, the arm 30 can be locked by the same procedure.

As described above, according to the first embodiment of the present invention, since the tooth portions 10a and 40a of the upper tooth 10 and the lower tooth 40 are meshed with each other by the torsional displacement of the arm 30, the free hinge side in an emergency. Arm 3
0, that is, the tilting of the seat backs S and B can be locked instantaneously and reliably. As a result, the safety of the occupant can be improved, the structure can be simplified, and the weight and cost can be reduced.

FIG. 8 is an operation explanatory view of the emergency lock device at the time of locking according to the second embodiment of the present invention.

In the arm 30 of the second embodiment, the spring mounting pin 34 and the spring engaging pin 34 are vertically arranged on both sides of the elongated hole 33 on the axis connecting the center of the shaft attaching hole 31 and the axis of the engaging pin 32. Locking pins 35 are respectively implanted, a base portion 36 a of a torsion coil spring 36 is wound around the spring mounting pin 34, and both hook portions 36 b of the torsion coil spring 36 are wound around the spring locking pin 35.
Is locked. Then, when the impact load in an emergency is removed, the arm 30 rotates in the direction of arrow D by the spring force of the torsion coil spring 36. As a result, the torsional displacement of the arm 30 can be forcibly eliminated.

The other structure and operation are the same as those shown in the first embodiment, and the description thereof will be omitted.

[0038]

As described above, according to the vehicle seat of the present invention, the seat back on the other side can be reliably locked only in an emergency, and the locking effect on the one side (seat reclining device side) is also provided. The safety of passengers in an emergency can be improved.

Further, since the cantilever seat reclining device is normally used, it is possible to eliminate the synchronization failure and the phase shift of the seat back at the time of operation, which are problems in the conventional two-sided seat reclining device. Moreover, the number of assembling steps can be significantly reduced, and the weight and cost can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective explanatory view of a vehicle seat according to the present invention.

FIG. 2 is a front explanatory view of an emergency lock device for a vehicle seat according to the present invention.

FIG. 3 is a front explanatory view of the upper part.

FIG. 4 is a front explanatory view of a lock limiting plate.

FIG. 5 is a front explanatory view of the arm.

FIG. 6 is a front explanatory view of a lower tooth.

FIG. 7 is a diagram for explaining the operation of the emergency locking device when locked.

FIG. 8 is an operation explanatory view of the emergency lock device at the time of locking according to the second embodiment of the present invention.

[Explanation of symbols]

 S Vehicle seat S1 Seat reclining device S2 Emergency locking device S / C Seat cushion S / B Seat back 10 Upper parts 10a Teeth 11 Shaft mounting part (shaft mounting hole) 12 Connecting shaft 13 Guide pin 20 Lock limiting plate 21 Shaft mounting Part (shaft attachment hole) 22 Engagement hole 24 Lock limiting surface 30 Arm 31 Shaft attachment part (shaft attachment hole) 32 Engagement pin 40 Lower tooth 40a Teeth 41 Axis 42 Abutment member 42a Abutment portion 50 Base plate 51 Seat back attachment Axis 60 connecting rod

Claims (1)

Claim: What is claimed is: 1. A seat back is tiltably supported on both sides of a seat cushion, and a seat reclining device for adjusting a tilt angle of the seat back is arranged on a support portion on one side, and the other side is arranged. A vehicle seat in which an emergency lock device for locking a seat back in an emergency is arranged on a support portion of the emergency lock device,
It is composed of a lock limiting plate, an arm and a lower tooth, and the upper part is axially mounted on a seat back mounting shaft projecting on a base plate fixed to the other side of the seat cushion, and above the shaft mounting portion. The connecting shaft that fits the connecting rod that is linked to the seat reclining device is planted, and the lock limiting plate is
While being axially attached to the seatback mounting shaft so as to be vertically movable by being superposed on the upper part suspension, a mountain-shaped engaging hole is formed below the shaft mounting portion and is normally located below the upper part suspension. Further, the arm is axially attached to the seat back mounting shaft so as to be superposed on the lock limiting plate and displaceable, and an engaging pin which engages with an engaging hole of the lock limiting plate is planted below the axial attaching portion. The lower tooth has a base portion pivotally attached to the base plate,
A vehicle seat characterized in that a tooth portion capable of meshing with the tooth portion of the upper part is formed on the free end side and is further urged toward the upper part.