JP7032196B2 - Crew restraint device - Google Patents

Description

The present invention relates to a occupant restraint device.

There is known an air belt device that stores a bag inside a seat belt and inflates the bag in the event of a vehicle collision to softly restrain the occupant.
In addition to the air belt, an occupant restraint device equipped with an airbag on the door side of the vehicle to enhance the occupant protection function has also been proposed.
For example, in such a occupant restraint device, in the event of a vehicle collision, an airbag on the door side protects the side of the occupant's chest, and the air belt is delayed to inflate to protect the occupant's head that falls to the outside of the vehicle body. (See Patent Document 1).

Japanese Unexamined Patent Publication No. 11-180241

However, in such an occupant restraint device, it is possible to protect the occupant when the occupant falls to the inflated air belt side, but it is possible to sufficiently protect the occupant when the occupant moves to the opposite side. However, there is a risk that the occupant will come off the air belt, fall down significantly, and move. Specifically, in the event of a collision from the passenger seat side of the vehicle, that is, a side collision from the left in a vehicle with a right-hand drive, the driver is swung to the left. At this time, the air belt easily comes off from the driver's right shoulder, and the driver cannot be firmly restrained and sufficiently protected.

The present invention has been made to solve such a conventional problem, and an object of the present invention is to provide an occupant restraining device capable of reliably restraining an occupant and enhancing a protective function in the event of a vehicle collision. ..

The occupant restraint device according to the present invention has a buckle on the inner side in the vehicle width direction with respect to the seat of the vehicle, and has a shoulder anchor on the outer side in the vehicle width direction from which the shoulder belt is pulled out, and slides along the shoulder belt. In a occupant restraint device using a seatbelt device that restrains an occupant by locking a movably provided tongue to the buckle, when the seatbelt device is attached, the seat is more than the center of the seat in the vehicle width direction. When a side collision between a bag provided in the shoulder belt on the tongue side and deployed upward from the shoulder belt and a side collision from the side opposite to the seating position of the occupant is detected or predicted, the bag It is characterized by being equipped with a bag deploying device that deploys the belt.

Further, the bag may be expanded upward in the round shape of the shoulder belt curved by wearing the seat belt device.

Further, the bag may be expanded more in the position above the shoulder belt away from the tongue than in the position near the tongue.

According to the present invention, it is possible to provide an occupant restraining device capable of reliably restraining an occupant and enhancing a protective function in the event of a vehicle collision.

It is sectional drawing which shows the outline of the vehicle which provided the occupant restraint device in embodiment of this invention. It is a front view when the bag is unfolded in the occupant restraint device of this embodiment. It is a top view when the bag is unfolded in the occupant restraint device of this embodiment. It is a perspective view which shows the outline of the structure of the shoulder belt part in this embodiment. It is a figure for demonstrating the shape of the bag in this embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an outline of a vehicle provided with a occupant restraint device according to an embodiment of the present invention. Further, FIG. 2 is a front view when the occupant restraint device of the present embodiment is activated and the bag is unfolded, and FIG. 3 is a top view when the bag is unfolded.

(Structure of vehicle 1)
As shown in FIG. 1, a seat seat 10 is provided on the floor surface 2 (a portion of the underbody where the floor panel is provided) of the vehicle 1. Further, on the outside of the floor surface 2 in the vehicle width direction (outside of the vehicle), the left and right center pillars 3 constituting the inner side wall of the vehicle body are arranged facing each other. It is integrally connected to 5. Further, a roof 6 is provided substantially horizontally on the upper part of the roof side rail 4.

Each seat 10 is provided with a occupant restraint device 100. Further, the occupant restraint device 100 of the right seat seat 10 and the occupant restraint device 100 of the left seat seat 10 are provided symmetrically.
In the following, the occupant restraint device 100 provided on the right seat 10 (left side in FIG. 1) will be described as an example.

The seat 10 includes a seat cushion 11 (seat portion) that supports the thigh from the buttocks of the occupant P, a reclining seat bag 12 (backrest portion), and a headrest 13 (head) that supports the head of the occupant P. Department) and.

(Structure of Crew Restraint Device 100)
The occupant restraint device 100 includes a seatbelt device 200 that restrains the occupant P, a bag 300 that is deployed at the time of collision detection or collision prediction of the vehicle 1, and an inflator 400 that deploys the bag 300 at the time of collision detection or collision prediction of the vehicle 1. , A collision detection device 500 that performs collision detection and collision prediction of the vehicle 1.

(Seat belt device 200)
The seatbelt device 200 includes a webbing 210, a lap anchor 220, a shoulder anchor 230, a retractor 240, a tongue 250, and a buckle 260.

The webbing 210 is a band-shaped belt that receives and softens the impact load. Further, one end of the webbing 210 is fixed to the lap anchor 220, is inserted into the center pillar 3 from the opening 3a of the center pillar 3 via the shoulder anchor 230, and the other end is wound by the retractor 240. There is.

The lap anchor 220 is fixed to the side wall surface of the side sill 5, and as described above, one end of the webbing 210 is fixed.
The shoulder anchor 230 is provided on the side wall of the center pillar 3 above the shoulder portion of the occupant P seated on the seat 10, and the webbing 210 is slidably inserted. That is, the shoulder anchor 230 is provided on the outer side in the vehicle width direction, and the webbing 210 (shoulder belt portion 211 described later) is pulled out. The opening 3a of the center pillar 3 is provided in the vicinity of the shoulder anchor 230.

The retractor 240 is a take-up device that winds up the webbing 210 and locks it in an emergency. Further, the retractor 240 is provided inside the center pillar 3 and supports the other end of the webbing 210 so as to be retractable. The retractor 240 applies a loose tension to the webbing 210 in the winding direction. The retractor 240 locks the webbing 210 when a pull-out speed of a certain value or more is applied, and also locks the webbing 210 when an acceleration of a certain value or more is applied to the vehicle body.

The tongue 250 is a T-shaped connecting metal fitting for connecting to the buckle 260. Further, the tongue 250 is a plate-shaped member provided with an insertion hole and a coupling hole. A webbing 210 is inserted into the insertion hole of the tongue 250, and is provided so as to be slidable with respect to the webbing 210. Further, the coupling hole of the tongue 250 is provided for coupling with the buckle 260.

The buckle 260 is a connecting part for attaching and detaching the tongue 250, and can firmly fix the tongue 250 even with a light force. Further, the buckle 260 is provided on the inner side (center side of the vehicle) of the seat cushion 11 of the seat seat 10 in the vehicle width direction. The buckle 260 locks and fixes the coupling hole of the tongue 250 by inserting the tongue 250, while the tongue 250 is detached by operating the removal button of the buckle 260. The tongue 250 can be easily attached and detached.

Further, in the webbing 210, when the tongue 250 inserted through the webbing 210 is inserted into the buckle 260 and locked, the position from the shoulder anchor 230 to the tongue 250 becomes the shoulder belt portion 211 (shoulder belt), and the tongue 250 The position from to the lap anchor 220 is the lap belt portion 212 (lap belt). That is, the webbing 210 includes a shoulder belt portion 211 that restrains the left shoulder of the occupant P through the front part of the chest to the right hip, and a lap belt portion 212 that restrains the occupant P from the right waist to the left waist through the front. , Have.

Further, as shown in FIG. 4, the shoulder belt portion 211 of the webbing 210 has a double-layered structure, and is on the outer side of the first shoulder belt portion 211a on the side in contact with the occupant P and on the front side of the vehicle when mounted. It has a second shoulder belt portion 211b.
In the present embodiment, as will be described later, the shoulder belt portion 211 has a two-sheet stacking structure, and the bag 300 is provided between them. However, the present invention is not limited to this, and the shoulder belt portion 211 has a single-sheet structure. The bag 300 may be provided on the inside (the side in contact with the occupant P), or the bag 300 may be provided on the outside (the front side of the vehicle). Further, the shoulder belt portion 211 may have a structure of three or more stacked, and the bag 300 may be provided at a predetermined position.

(Bag 300)
The bag 300 is provided inside the shoulder belt portion 211, and is deployed by the inflator 400 at the time of collision detection or collision prediction of the vehicle 1. Further, the bag 300 is provided between the first shoulder belt portion 211a and the second shoulder belt portion 211b.

The bag 300 is provided on the tongue 250 side of the shoulder belt portion 211 when the belt is attached, with respect to the vehicle width direction center portion of the seat seat 10. Further, as described above, the bag 300 is provided between the first shoulder belt portion 211a and the second shoulder belt portion 211b, and the first shoulder belt portion 211a and the second shoulder belt portion 211b are the bags. At the location where the 300 is located, the lower side is tightly sewn and the upper side is weakly bound so that it can be easily opened when pressure is applied.

Further, the bag 300 can supply gas to the inside from the inflator 400. When gas is supplied from the inflator 400, the bag 300 expands to open the upper bond between the first shoulder belt portion 211a and the second shoulder belt portion 211b, and the left armpit (one armpit) of the occupant P. It is designed to expand upward aiming at the direction. Since the bag 300 expands to the vicinity of the armpit of the occupant P, it is supported by the ribs when the occupant P is restrained, and it is possible to avoid pressure on a weak part such as the abdomen as much as possible. Further, since it can be supported by a portion separated from the shoulder belt portion 211, the binding force of the occupant P can be increased.

Further, the bag 300 has a curved round shape along the shape of the shoulder belt portion 211 when the shoulder belt portion 211 is inserted, but when deployed, the round shape remains as it is. Deploy upwards.
Further, in the bag 300, the upper portion 300a of the bag 300 on the side closer to the shoulder anchor 230 away from the tongue 250 is expanded more than the lower portion 300b of the bag 300 on the side closer to the tongue 250. ing. That is, the bag 300 is expanded on the side closer to the center of the seat 10 in the vehicle width direction than on the side (left side) that hits the outside of the seat 10.

(Inflator 400)
The inflator 400 supplies gas to the bag 300. More specifically, the inflator 400 is activated when the collision detection device 500 performs collision detection or collision prediction of the vehicle 1, ignites the explosive based on the signal sent from the collision detection device 500, and undergoes a chemical reaction by combustion. It generates gas, supplies gas to the bag 300, and expands the bag 300. That is, the inflator 400 plays the role of a bag deploying device that deploys the bag 300 when the collision detection or collision prediction of the vehicle 1 is performed.

(Collision detection device 500)
The collision detection device 500 performs collision detection and collision prediction of the vehicle 1. Further, the collision detection device 500 operates the inflator 400 when the collision is detected or the collision is predicted. For example, the collision detection device 500 detects and predicts a side collision (side collision) of an obstacle from the side (left side) opposite to the position where the occupant P sits, or an oblique collision (diagonal collision) from the front left. do.

In the present embodiment, the collision detection device 500 performs both the prediction of the collision with the vehicle 1 and the detection of the collision, but the collision detection device 500 is not limited to this. It may be the one that only predicts the collision with respect to 1 or the one that only detects the collision with respect to the vehicle 1.
Further, the collision detection device 500 and the inflator 400 may be controlled by an ECU (Electronic Control Unit).

(Operation of occupant restraint device 100)
When the seatbelt device 200 is inserted in such an occupant restraint device 100, it is in an operation ready state. Specifically, when the tongue 250 is inserted into the buckle 260 and engaged, the inflator 400 with respect to the target seat 10 becomes the target of the signal output destination from the collision detection device 500.
Then, when the collision detection device 500 performs collision detection or collision prediction of the vehicle 1, it transmits a signal to the target inflator 400 to operate the inflator 400.

When a signal is sent by the collision detection device 500 or the collision prediction by the collision detection device 500, the inflator 400 generates gas and supplies the gas to the bag 300.

The bag 300 expands in the shoulder belt portion 211 when gas is supplied from the inflator 400. When the bag 300 expands, the adhesion between the first shoulder belt portion 211a and the second shoulder belt portion 211b at the upper position of the bag 300 is opened, and the bag 300 protrudes from the shoulder belt portion 211. When the gas of the inflator 400 is supplied to the bag 300, the bag 300 expands and expands to the vicinity of the armpit of the occupant P.

At this time, since the shoulder belt portion 211 is curved and inserted along the waist of the occupant P, the bag 300 protrudes upward while maintaining this curved round shape, and is attached to the wall surrounding the occupant P. Appears like.
As described above, since the bag 300 protrudes in a round shape, even if the occupant P falls down in the direction of the bag 300, the occupant P is hard to break due to the shape and is hard to fall down, so that the occupant P can be firmly received. Further, since the bag 300 expands to the vicinity of the armpit of the occupant P, the bag 300 can be brought into contact with the vicinity of the ribs of the occupant P, and the binding force of the occupant P can be enhanced.

Further, the bag 300 is expanded on the side closer to the center of the seat 10 in the vehicle width direction than on the side corresponding to the outside of the seat 10 (left side). Here, as shown in FIG. 5, when the occupant P is a thin person or a small person, when the seatbelt device 200 is inserted, the shoulder belt portion 211 is not pulled out so much and the tongue 250 is pulled out. It can be engaged with the buckle 260. Therefore, the portion of the bag 300 where the deployment is small hits the side portion of the occupant P, but since the weight of the occupant P is considered to be light, the occupant P can be sufficiently protected. Further, since the bag 300 does not protrude too much for a small person, it can be appropriately restrained without imposing a load on the occupant P, such as an excessive force being applied to the armpit.

Further, when the occupant P is a fat person or a large person, when the seatbelt device 200 is inserted, the shoulder belt portion 211 is largely pulled out and the tongue 250 is engaged with the buckle 260. Therefore, the portion where the bag 300 is largely deployed hits the side portion of the occupant P. Therefore, even if the weight of the occupant P is heavy, the occupant P can be sufficiently protected.

Further, as described above, since the expansion amount is changed depending on the location of the bag 300 according to the application (deployment position), the gas of the inflator 400 can be effectively used, and the increase in size of the inflator 400 can be suppressed. ..
In the present embodiment, the bag 300 is expanded on the side closer to the center of the seat 10 in the vehicle width direction than on the side corresponding to the outside of the seat 10. Not limited to this, the amount of deployment may be the same, or the side of the seat 10 closer to the center in the vehicle width direction may be deployed smaller than the side corresponding to the outside of the seat 10. For example, the tip of the unfolded portion of the bag 300 is substantially unfolded so that the side of the bag 300 closer to the center of the seat 10 in the vehicle width direction is expanded smaller than the side of the seat 10 that is in contact with the outside of the seat 10. It may be horizontal.

As described above, in the occupant restraint device 100 according to the present embodiment, when the seatbelt device 200 is attached, the bag 300 is placed in the shoulder belt portion 211 which is on the tongue 250 side of the center of the seat 10 in the vehicle width direction. When the collision with the vehicle 1 is detected or predicted, the bag 300 is deployed upward from the inside of the shoulder belt portion 211, so that the occupant P can be reliably restrained and the protection function can be enhanced at the time of the collision of the vehicle 1. can. In particular, in the case of a side collision from the side opposite to the position where the occupant P is seated, the bag 300 is deployed on the side where the occupant P moves, so that the occupant P can be reliably restrained and the protection function can be enhanced.

Further, in the occupant restraint device 100 according to the present embodiment, the bag 300 is expanded upward in the round shape of the shoulder belt portion 211 curved by the seatbelt device 200, so that the bag 300 is hard to break and is hard to fall down. , The strength is increased, the occupant P can be reliably restrained, and the protective function can be enhanced.

Further, in the occupant restraint device 100 in the present embodiment, the bag 300 is deployed more greatly in the position above the shoulder belt portion 211 away from the tongue 250 than in the position near the tongue 250. Depending on the body shape of P, it can be protected with an appropriate deployment amount, and the gas of the inflator 400 can be effectively used to enhance the protection function of the occupant P.

1 vehicle, 2 floors, 3 center pillars, 3a openings, 4 roof side rails, 5 side sills, 6 roofs, 10 seat seats, 11 seat cushions, 12 seat bags, 13 headrests, 100 occupant restraint devices, 200 seat belt devices. , 210 webbing, 211 shoulder belt, 211a 1st shoulder belt, 211b 2nd shoulder belt, 212 lap belt, 220 lap anchor, 230 shoulder anchor, 240 retractor, 250 tongue, 260 buckle, 300 bag, 400 Inflator, 500 collision detector

Claims (3)

The tongue is slidably provided along the shoulder belt, having a buckle inside the vehicle width direction and having a shoulder anchor from which the shoulder belt is pulled out with respect to the vehicle seat. In an occupant restraint device using a seatbelt device that restrains an occupant by locking it to a buckle,
When the seatbelt device is attached, a bag provided in the shoulder belt on the tongue side of the center of the seat in the vehicle width direction and deployed upward from the inside of the shoulder belt.
A bag deploying device that unfolds the bag when a side collision from the side opposite to the seating position of the occupant is detected or predicted.
A occupant restraint device characterized by being equipped with. The bag is deployed upward in the round shape of the shoulder belt curved by the attachment of the seat belt device.
The occupant restraint device according to claim 1. The bag is expanded more in the position above the shoulder belt away from the tongue than in the position near the tongue.
The occupant restraint device according to claim 1 or 2, wherein the occupant restraint device is characterized in that.

Images