JPH10250437A - Seat lock unlocking deivce for vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make applicable for not only a driver's seat but also a passenger seat or the like, enable the seat to surely retract when a vehicle is in head-on collision, and improve ejection of a seated person in the seat. SOLUTION: In this device, lower rails 16a, 16b are arranged to extend in an advancing direction of a vehicle on a floor, upper rails 17a, 17b fixed to a seat cushion 13a, so as to be opposed to the lower rails 16a, 16b, are mounted movably in a longitudinal direction in the lower rails 16a, 16b. In the upper rails 17a, 17b, a first locked part 21 is provided, in the lower rails 16a, 16b, a first lock fixture 31 detachably locked to the first locked part is provided. A knee protector movable in the advancing direction of the vehicle is provided forward of a seat, one end is connected to the knee protector through a link mechanism, in a cable 49, the other end thereof is connected to a first lock part. A knee of a seater comes into contact with the knee protector, when it is relatively advanced relating to a car body, the cable makes the first lock fixture detached from the first locked part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for automatically releasing a seat lock of a seat at the time of a frontal collision of a vehicle.

[0002]

2. Description of the Related Art As a retreating device of this kind, the present applicant has
A large number of locked holes are provided on the lower rail fixed to the floor, and a seat cushion is attached to the upper rail slidably disposed on the lower rail so as to face the steering column. A utility model registration application has been filed for a device for automatically retreating a vehicle driver's seat in which an adjusting handle having a locking claw that can be locked to the upper rail is rotatably attached to the upper rail (Japanese Utility Model Application Laid-Open No. 7-11437). In this device, the locking claw is formed so as to be tapered toward the locked hole, and the rear edge of the locking claw is inclined at a predetermined angle with respect to the direction in which the locking claw is locked. .

In the thus configured device for automatically retreating the vehicle driver's seat, when the vehicle collides from the front, the steering column moves rearward and pushes the cushion frame. At this time, since the rear edge of the locking claw is inclined with respect to the direction in which the locking claw is locked, the locking claw slides and separates from the locked hole. As a result, the cushion frame moves rearward together with the seat cushion and the seat back, so that the driver can easily escape from the colliding vehicle.

[0004]

However, in the above-mentioned conventional device for automatically retreating the driver's seat for a vehicle, if the seat cushion is not pushed by a steering column with a load of a predetermined value or more after the frontal collision of the vehicle, the device retreats. That is, there is a problem that it can be applied only to the driver's seat where the steering column is located forward. An object of the present invention is to provide a seat unlocking device for a vehicle seat that can be applied not only to a driver's seat but also to a passenger seat and the like, can reliably retreat the seat at the time of a frontal collision of the vehicle, and can improve the escape property of the occupant of the seat. To provide. Another object of the present invention is to provide a seat lock release device for a vehicle seat that can prevent the seat from advancing when the first locking member separates from the first locked portion.

[0005]

The invention according to claim 1 is
As shown in FIGS. 1, 4 and 10, a pair of lower rails 16a and 16b extending on the floor 11a in the traveling direction of the vehicle 10, and the lower rails 16a and 16b are provided.
b is fixed to the seat cushion 13a of the seat 13 so as to face the pair of lower rails 16a, 16b, respectively.
b, a pair of upper rails 17a, 17b respectively attached to the front rails so as to be movable in the front-rear direction.
17b or a first rail provided on the lower rails 16a, 16b.
The locked part 21, the first locking member 31 provided on the lower rail 16 a, 16 b or the upper rail 17 a, 17 b and removably locked to the first locked part 21, and the knee of the seated person 15 on the seat 13 A knee protector 46 attached to the vehicle body so as to be movable in front of 15a and in the traveling direction of the vehicle 10 has one end connected to the knee protector 46 via a link mechanism 48 and the other end connected to the first locking member 31. A cable 49 for detaching the first locking member 31 from the first locked portion 21 when the knee 15 a of the seated person 15 contacts the knee protector 46 and the knee protector 46 advances relatively to the vehicle body.
A seat lock release device for a vehicle seat comprising:

In the vehicle seat unlocking device according to the first aspect, when the vehicle 10 collides from the front,
The front of the vehicle 10 enters the passenger compartment and the occupant 1 of the seat 13
5 moves forward by the slack of the seat belt, and the knee 15a of the seated person 15 contacts the knee protector 46 to move the knee protector 46 forward. At this time, since the link mechanism 48 connected to the knee protector 46 rotates in a predetermined direction, the cable 49 causes the first locking member 31 to be detached from the first locked portion 21. As a result, the upper rail 17
Since the upper rails 17a and 17b can move in the front-rear direction with respect to the lower rails 16a and 16b, the upper rails 17a and 17b are intruded into the vehicle compartment at the front of the vehicle 10 or inflated by an airbag or the like.
Retreats with the seat 13.

The invention according to claim 2 is the invention according to claim 1, and as shown in FIGS. 2 and 8, at predetermined intervals along the lower rails 16a, 16b or the upper rails 17a, 17b. The plurality of second locked portions 22 provided and the upper rails 17a, 17b or the lower rail 1
A second locking member that is pivotally attached to the first and second lockable portions and is configured to be selectively locked to the plurality of second locked portions, and that allows the upper rails to be retracted and prevents the upper rails from moving forward; It is characterized by. In the vehicle seat unlocking device according to the second aspect, when the first locking member 31 is detached from the first locked portion 21, even if the seat 13 is released.
Even if a forward load acts on the upper rails 17a, 17b
Can be prevented from moving forward with the seat 13.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. As shown in FIGS.
A cab 11 of the cab-over type truck 10 is provided with a driver's seat 13 facing a steering column 12 for rotatably holding a steering shaft.
Is attached to the floor 11a via the seat lock release device 14. The driver's seat 13 includes a seat cushion 13a that receives the buttocks of the driver 15 and a seatback 13c that is attached to the rear end of the seat cushion 13a via a reclining adjuster 13b and receives the back of the driver 15 (FIGS. 2 and 5). 3 and FIG. 10). Seat cushion 13
A cushion frame 13d in which a round pipe is formed in the shape of a square frame is built in a lower part of a (FIGS. 1, 8, and 9).
The seat unlocking device 14 includes a pair of lower rails 1 extending on the floor 11a in the traveling direction of the truck 10.
6a, 16b, a pair of upper rails 17a, 17b fixed to the seat cushion 13a via a seat track 19 so as to face the pair of lower rails 16a, 16b, respectively, and a first locked member provided on the upper rail 17a. Part 21 and a first locking member 31 provided on the lower rail 16a and removably locked to the first locked part 21
(FIGS. 1 to 3 and FIGS. 5 to 7).

The lower rails 16a and 16b are connected to the floor 11a.
It is attached via a seat leg 18 and a seat bracket 20 (FIGS. 2 and 3). Lower rail 16a,
A single roller housing 23 and a pair of steel ball housings 24, 24 are formed between the upper rail 16b and the upper rails 17a, 17b (FIG. 9). A roller 27 (FIGS. 2, 3 and 9) rotatably mounted on each of the upper rails 17a and 17b via a roller bracket 26 is accommodated in the roller accommodating portion 23.
The upper rails 17a, 17b are rolled on the roller rolling surface 16c of the lower rails 16a, 16b.
6b is configured to be movable along the longitudinal direction. The roller 27 is mounted on the pair of upper rails 17a and 17b respectively.
They are attached individually (FIGS. 2 and 3). A pair of steel balls 28, 28 for preventing rattling between the lower rails 16a, 16b and the upper rails 17a, 17b in the width direction and the vertical direction are respectively accommodated in the pair of steel ball storage portions 24, 24 (FIG. 9). .

The seat track 19 has a pair of lower rails 19a and 19b fixed to the upper surfaces of the pair of upper rails 17a and 17b by rivets 30 (FIG. 8), respectively.
A pair of upper rails 19c fixed to the seat cushion 13a via the first and second connection brackets 51, 52 (FIGS. 1, 8 and 9) so as to face the pair of lower rails 19a, 19b, respectively. , 19d (FIGS. 1 to 3, 8 and 9). The lower rail 19a,
19b and the upper rails 19c and 19d are the lower rail 16
a, 16b and the upper rails 17a, 17b are formed in the same shape, respectively, and between the lower rails 19a, 19b and the upper rails 19c, 19d, a roller housing 19e having the same shape as the roller housing 23 and the steel ball housing 24 is provided. And a steel ball housing 19f are formed respectively. The rollers 27 and the steel balls 28 are accommodated in these accommodation portions 19e, 19f.
A roller 19g and a steel ball 19h having the same shape as above are accommodated respectively.

The front and rear ends of the roller rolling surface 16c of the lower rails 16a and 16b are provided with upper rails 17a and 17b.
Forward stopper (not shown) and backward stopper (not shown) for determining the most advanced position and the most retracted position of the
Are protruded, and the upper rails 19c and 19c are also provided at the front end and the rear end of the roller rolling surface 19i of the lower rails 19a and 19b.
A forward stopper (not shown) and a backward stopper (not shown) for determining the most advanced position and the most retracted position of 19d are respectively protruded.

A short pipe 34 is fixed to the outer surface of one of the upper rails 17a, 17b via a pipe support 33, as shown in FIGS.
And FIG. 7), the vertically extending hole formed in the short tube 34 is the first locked portion 21. A cable support 35 having a channel cross section is fixed to the bottom surface of one of the lower rails 16a, 16b of the pair of lower rails 16a, 16b. 34 first locked part 2
A holding pipe 36 having a sliding hole 36a having the same hole center as 1 is fixed. The first locking member 31 is a pin slidably inserted into the sliding hole 36a.
a is formed. A compression coil spring 37a is provided between the lower surface of the first locking member 31 and the lower piece 35b of the cable support 35.
The first locking member 31 is pushed upward by the elastic force of the spring 37a, and its tip is inserted into the first locked portion 21 of the short pipe 34.

Reference numeral 37b in FIGS. 6 and 7 denotes a leaf spring fitted to the lower end of the short tube 34. The leaf spring 37b is formed of an extremely thin steel plate or resin. This spring 37b
When the first locking member 31 is inserted and locked in the first locked portion 21, the first locking member 31 is elastically deformed and abuts on the outer peripheral surface of the first locking member 31. When the first locked portion 21 is pulled out of the first locked portion 21 and separated from the first locked portion 21, it comes into close contact with the lower surface of the short pipe 34 so as to cover a part of the first locked portion 21. As a result, the first locking member 31 can be prevented from being inserted into the first locked portion 21 again.

On the other hand, as shown in detail in FIG. 4, FIG. 5 and FIG. 10, an instrument panel 45 is provided in front of the steering column 12, and a seated person in the driver seat 13 is provided below the instrument panel 45. That is, the driver 15
A knee protector 46 is provided to face the knee 15a. A front end of the knee protector 46 is provided with a guide member 47 provided in the instrument panel 45 so as to extend in the front-rear direction.
The knee protector 46 is configured to be movable along the guide member 47 in the traveling direction of the track 10. The knee protector 46 is connected to one end of a cable 49 via a link mechanism 48, and the link mechanism 48
Is housed in the knee protector 46 and the guide member 47.

One end of the link mechanism 48 is the knee protector 4.
6 has a first link 48a pivotally attached to the inner surface thereof, and a second link 48b having a center pivotally attached to the guide member 47 and one end connected to the other end of the first link 48a. The cable 49 has one end fixed to the dash panel 45a and the other end fixed to the lower piece 35b of the cable support 35, and an outer cable 49a slidably inserted through the outer cable 49a and one end connected to the second link 48b. An inner cable 49b connected to the other end and the other end connected to the lower end of the first locking member 31; Reference numeral 50 in FIGS. 4 and 5 denotes a tension coil spring that urges the knee protector 46 in a retreating direction.

A rail stopper 38 projecting outward and extending along the longitudinal direction of the rail 16a is fixed to the bottom surface of one of the lower rails 16a, 16b by a rivet 38a (FIGS. 2 and 3). 3 and FIG. 8). A plurality of second locked portions 22 are provided on the outer upper surface of the rail stopper 38 at predetermined intervals in the longitudinal direction of the rail 16a.
a, a plurality of second rails
Single second locking member 3 that can be selectively locked to locked portion 22
2 is pivotally connected via a pin 39. The second locked portion 22 is a concave portion formed in a substantially V shape.
2 has a front surface 22a formed on an upright surface extending in a substantially vertical direction, and a rear surface 22b formed on an inclined surface gently climbing rearward (FIGS. 2 and 3).

The second locking member 32 is bent in a substantially inverted L-shape, and its center is pivotally connected to the upper rail 17a via the pin 39. Further, a tension coil spring 40 is stretched between the other end of the second locking member 32 and the upper rail 17a. When one end of the second locking member 32 is pressed against the rear surface 22b of the second locked portion 22 by the elastic force of the tension coil spring 40, the second locking member 32 becomes a plurality of second locked portions. 22. When a backward load acts on the upper rail 17a, the second
The locking member 32 is successively locked to the rear locked portion 22 by the elastic force of the tension coil spring 40 while the upper rail 17 is being locked.
a, the locking device 32 is moved back together with the upper rail 1
7a and 17b are configured to allow retreat.

A plate 41 with holes is interposed between the other upper rail 17b and the other lower rail 19b, and a large number of square holes are formed in the plate 41 with holes along the longitudinal direction of the rails 17b and 19b. 41a are formed (FIG. 8). A base end of a handle holder 42 is fixed to the upper surface of the other upper rail 19d.
Is bent in a ring shape. This handle holder 4
An adjustment handle 43 is rotatably inserted into the distal end bent into a ring shape. A base end of a claw member 44 is fixed to the adjustment handle 43, and a distal end of the claw member 44 is bent so as to be selectively inserted into the plurality of square holes 41a. A torsion coil spring (not shown) is wound around the adjustment handle 43, and this spring urges the adjustment handle 43 to rotate in a direction of inserting the claw member 44 into the square hole 41a.

In this embodiment, a cab-over type truck is described as a vehicle, but a passenger car or another vehicle may be used. Further, in this embodiment, the first locked portion is provided on the upper rail and the first locking device is provided on the lower rail. However, the first locked portion is provided on the lower rail, and the first locking device is provided on the upper rail. It may be provided. Further, in this embodiment, the plurality of second locked portions are provided on the lower rail, and the second locking tool is pivotally mounted on the upper rail. However, the plurality of second locked portions are provided on the upper rail, and the second rail is provided on the lower rail. Two locking devices may be pivotally connected. In this embodiment, the driver's seat is described as a seat, but a passenger seat or another seat may be used. Further, in this embodiment, the seat track is mounted on the upper surface of the upper rail, but the seat track may be mounted on the lower surface of the lower rail.

The operation of the seat lock release device 14 of the driver's seat 13 for the truck 10 thus configured is shown in FIGS.
1 will be described. When the truck 10 collides from the front, a shocking and large forward load acts on the driver's seat 13 (range in FIG. 11). At this time, the front of the truck 10 enters the passenger compartment and the driver 15 moves forward by the slack of the seat belt (not shown), so that the knee 15a of the driver 15 contacts the knee protector 46, and the knee protector 46 Move 46 forward. When the knee 15a of the driver 15 starts to contact the knee protector 46, the load acting on the driver's seat 13 has already shifted to the range shown in FIG. 11, and the first link 48a connected to the knee protector 46 is connected to the knee protector 46 in FIG.
Move in the direction of the solid arrow, and the second link 48b rotates in the direction of the dashed arrow against the elastic force of the tension coil spring 50, so that one end of the inner cable 49b is
It is drawn into 7. As a result, the other end of the inner cable 49b pulls the first locking member 31 downward, so that the first locking member 31 is separated from the first locked portion 21.

Immediately after this, a rearward load is applied to the driver's seat 13 when the retreating steering column 12 abuts on the seat cushion 13a or an airbag (not shown) is inflated (see FIG. 11). ), The upper rails 17a, 17b move backward along with the driver's seat 13 along the lower rails 16a, 16b. As a result, the driver's seat 13 can be reliably retreated at the time of a frontal collision of the truck 10, and the escape property of the driver 15 can be improved. Further, as the upper rails 17a, 17b retreat together with the driver's seat 13, the second locking members 32 are sequentially locked to the rear second locked portion 22, so that the upper rails 17a, 17b are held at the retracted positions, Even if a forward load is applied to the driver's seat 13 again, the driver's seat 13 does not move forward.

[0022]

As described above, according to the present invention, the upper rail fixed to the seat cushion is attached to the lower rail arranged on the floor so as to be movable in the front-rear direction.
A first locking member which is detachably locked to a first locked portion provided on the upper rail or the lower rail is provided on the lower rail or the upper rail, and a knee protector movable in a traveling direction of the vehicle is provided in front of the seat; Connect the other end of the cable, one end of which is connected to the knee protector via the link mechanism, to the first
Since it is configured to be connected to the locking device, when the vehicle collides from the front, the knee of the occupant abuts the knee protector due to the intrusion of the front of the vehicle into the passenger compartment and the forward movement of the occupant to the seat. The knee protector moves forward. As a result, the cable separates the first locking member from the first locked portion by the rotation of the link mechanism connected to the knee protector.
The upper rail can move in the front-rear direction with respect to the lower rail. Therefore, the upper rail is retracted together with the seat due to intrusion into the vehicle compartment at the front of the vehicle or expansion of the airbag or the like.

Further, a plurality of second locked portions are provided at predetermined intervals along the lower rail or the upper rail, and the upper rails are allowed to retreat by being selectively locked to the plurality of second locked portions. In addition, if the second locking member for preventing advancement is pivotally attached to the upper rail or the lower rail, the upper rail can be moved even when a forward load is applied to the seat when the first locking member is separated from the first locked portion. It can be prevented from moving forward with the seat.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view taken along the line AA of FIG. 2, showing a seat lock release device for a vehicle seat according to an embodiment of the present invention.

FIG. 2 is an enlarged side view of a portion B in FIG. 10;

FIG. 3 is a side view corresponding to FIG. 2, showing a state in which the upper rail has moved rearward with the seat.

FIG. 4 is an enlarged sectional view of a portion C in FIG. 10;

5 is a cross-sectional view corresponding to FIG. 4, showing a state where the knee protector is relatively pushed forward by being pushed by a knee of a seated person.

FIG. 6 is an enlarged sectional view of a part D in FIG. 1;

FIG. 7 is a cross-sectional view corresponding to FIG. 6, showing a state in which the first locking tool is detached from the first locked portion.

FIG. 8 is a sectional view taken along line EE of FIG. 2;

FIG. 9 is a sectional view taken along line FF of FIG. 2;

FIG. 10 is a cross-sectional configuration diagram of a cab of a truck including a driver's seat showing a state before a frontal collision.

FIG. 11 is a diagram showing a change in load acting on a seat when the truck collides with the vehicle from the front;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Truck (vehicle) 11a Floor 13 Driver's seat (seat) 13a Seat cushion 14 Seat unlocking device 15 Driver (seater) 15a Knee 16a, 16b Lower rail 17a, 17b Upper rail 21 First locked part 22 Second engaged Stop part 31 First locking tool 32 Second locking tool 46 Knee protector 48 Link mechanism 49 Cable

Claims (2)

[Claims] 1. A pair of lower rails (16a, 16b) extending on a floor (11a) in a traveling direction of a vehicle (10) and facing a pair of lower rails (16a, 16b), respectively. A pair of upper rails (17a, 17b) fixed to a seat cushion (13a) of a seat (13) and movably attached to the pair of lower rails (16a, 16b) in the front-rear direction; and the upper rails (17a, 17b). Or the lower rail (16a, 16
b) provided on the lower rail (16a, 16b) or the upper rail (17a, 17).
b) a first locking member (31) which is provided on the first locked portion (21) and is detachably locked to the first locked portion (21); and a knee (15a) of a seated person (15) on the seat (13). A knee protector (46) attached to the vehicle body so as to be movable forward and in the traveling direction of the vehicle (10); one end connected to the knee protector (46) via a link mechanism (48) and the other end The knee (15a) of the seated person (15) is connected to the first locking member (31) and abuts the knee protector (46) so that the knee protector (46) moves forward relative to the vehicle body. And a cable (49) for releasing the first locking member (31) from the first locked portion (21) when the vehicle is locked. 2. Lower rail (16a, 16b) or upper rail
(17a, 17b), a plurality of second locked portions (22) provided at predetermined intervals, and the upper rail (17a, 17b) or the lower rail (16a, 16
b) a second locking member which is pivotally mounted on the second rail and which can be selectively locked to the plurality of second locked portions (22), and which allows the upper rails (17a, 17b) to retreat and prevents advancement. The seat lock release device for a vehicle seat according to claim 1, further comprising (32).