JPH0534461Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> The present invention relates to a seat belt device with an air bag, in which an air bag is connected in the middle.

<Prior art> Conventional seat belts have one end connected to the right side or left side of the car seat, the other end wound around the upper side of the car center frame, and the middle part connected to the left side or right side of the seat. It was detachably connected to the side.

<Problem to be solved by the invention> Since the seat belt locks when the car suddenly stops, when the car suddenly stops due to a collision and the person tries to move forward due to inertia, the seat belt will cause the person's chest to be There was a possibility that I would get hit in the lower back area.

<Means for solving the problem> The present invention was made to solve the above-mentioned problem. One end of the seat belt is connected to the right side or left side of the car seat, and the other end is connected to the center of the car. The seatbelt is wound up on the upper side of the frame, and the intermediate connecting part is removably connected to the left or right side of the seat, and a locking device is provided that locks the other end of the seatbelt when an impact force due to sudden braking is applied. In the seat belt device equipped with the above-mentioned seat belt device, a mouth of an air bag that is inflated by the impact of a car collision is attached to the upper rear part of the seat, and one end of the belt is attached to the inner surface of the air bag on the opposite side from the mouth through the mouth of the air bag, The other end of the belt is connected between the intermediate connecting part and the other end of the seat belt, and the air bag is provided with a gas release port, and when the air bag is inflated, the seat belt is unlocked by the locking device. It is equipped with a device.

<Operation> When an impact force is applied due to sudden braking, the locking device locks the other end of the seatbelt,
It can prevent people from moving forward. Furthermore, when an impact force is applied due to a collision, the air bag inflates and the lock release device releases the lock. The inertial force of a person trying to move forward is absorbed by the air bag through the seat belt and belt, and furthermore, by releasing the gas from the air bag's release port, it is possible to prevent the pressure of the gas inside the air bag from increasing. At the same time, the inertial force can be gradually absorbed.

<Examples> Examples of the present invention will be described below based on the drawings. In Figure 1, 10 is the steering wheel of the car, 2
0 is a floor panel, 30 is a front seat placed on the floor panel, 40 is a rear seat placed on the floor panel, 50 is a seat belt for the front seat, and 60 is a seat belt for the back seat. , 70 is an airbag, and 80 and 81 are dolls sitting on the seats.

A folding member 51 is attached to the upper part of the center frame (not shown) between the front door and the rear door of the automobile, and one end of the seat belt 50 that is bent toward the center frame through the folding member 51 is attached to the lower part of the center frame. It is being wound up.
The seat belt 50, which is bent toward the doll 80 via the folding member 51, passes over the chest of the doll 80, and the intermediate connecting portion is detachably connected to the right side of the seat. The seat belt 50 connected to the right side of the seat is now folded back toward the doll 80, passes around the waist of the doll 80, and the other end is connected to the left side of the seat.
When the seat belt 50 is subjected to a large acceleration such as a sudden stop of the automobile, the pendulum 55 swings as shown in FIG.
When the seatbelt 50 is tilted, the pawl 56 rises, and the pawl 56 is caught on the ratchet 57, thereby locking the seatbelt 50 from being pulled out. The pendulum 55, pawl 56 and ratchet 57 constitute a locking mechanism for the seat belt 50. Reference numeral 58 designates an unlocking device that returns the pendulum 55 tilted in the deceleration direction when the airbag 70 is operated to a straight state and unlocks the seatbelt 50. The device 58 ruptures the gunpowder 58a with the fuse 58b and releases the gunpowder 58a into the spring 58c. This is to overcome this and move the rod 58d to the forward end. 5
Reference numeral 8e designates a one-way rubber valve for preventing the gas expanded by the bursting of the gunpowder 58a from escaping to the outside.

The seat belt 50 between the chest of the doll 80 and the folding member 51 is folded back at the first pin portion 53 of the connecting member 52 as shown in FIG.
is held at any position on the seat belt 50.
One end of the band 90 is connected to the second pin portion 54 of the connecting member 52 .

The air bag 70 is connected to the opening 7 as shown in FIG.
1 is fixed to the upper part of the back of the seat 30 by a metal band 72. A band 90 passes through the opening 71, and the other end of the band 90 is connected to the inner surface of the air bag 70 on the side opposite to the opening 71. air bag 7
0 expands when the gunpowder ruptures upon impact. Airbag 70 has a second
As shown in the figure, a small escape port 73 is provided to allow air to escape to the outside.

Next, the seat belt 50 is
The operation of this will be explained. When a car collides, the first thing that happens is the airbag 70 due to the impact that occurs during the collision.
The gunpowder 58a expands instantly, causing the rod 58d to move forward and unlock the seatbelt 50. The expansion of the air bag 70 causes the band 90 to be pulled rearward. When the car suddenly stops due to a collision, the dolls 80 and 81 try to move forward due to inertia, but at this time, the air bags 7
By pulling 0, the inertial force is absorbed by the air bag 70. At this time, air bag 7
Since the gas inside the air bag 70 leaks to the outside through the escape port 73, it is possible to prevent the pressure of the gas inside the air bag 70 from increasing, and it can gradually absorb the inertia force of the person trying to move forward, thereby reducing the pressure on the chest and waist. The impact on the hit is alleviated. Further, a person sitting in the rear seat 40 comes into contact with the air bag 70 to prevent impact force from acting on the head.

Sudden stopping of a car by stepping on the brake is
The winding of the seat belt 50 is locked, and the locked seat belt 50 prevents the person from moving forward.

<Effects of the invention> As described above, the present invention prevents the seat belt from being locked by the locking device due to the impact force when the brakes are suddenly applied, and the person from moving forward due to inertia. can. Additionally, as the air bag inflates due to the impact force at the time of a car collision, the locking device is unlocked by the lock release device, and the inertial force of the person trying to move forward is transferred to the air bag through the seat belt and belt. It is then absorbed. Furthermore, it is possible to prevent the pressure of the gas inside the air bag from increasing due to the gas inside the air bag leaking to the outside from the escape port.
The inertial force can be gradually absorbed. Therefore, it is possible to obtain the effect of preventing strong blows to the human chest and lower back.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention. Fig. 1 shows the state when the air bag is stored behind the seat, Fig. 2 shows the state when the air bag is inflated, and Fig. 3 shows the connecting member. FIG. 4 is a sectional view of the air bag opening, and FIG. 5 is a perspective view of the seat belt pull-out lock device. 30...seat, 50...seat belt, 52...
...Connecting member, 58... Lock release device, 70...
Air bag, 71...mouth, 73...escape port,
90... Obi.

Claims (1)

[Scope of utility model registration request] One end of the seatbelt is connected to the right side or left side of the seat of an automobile, the other end is wound around the upper side of the center frame of the automobile, and the intermediate connecting part is detachably connected to the left side or right side of the seat. In a seatbelt device equipped with a locking device that locks the other end of the seatbelt when an impact force is applied due to sudden braking, the mouth of an airbag that is inflated by the impact of a car collision is attached to the upper rear part of the seat. One end of the band is attached to the inner surface of the air bag on the side opposite to the opening of the air bag through the opening of the air bag, the other end of the band is connected between the intermediate connection part of the seat belt and the other end, and the air bag is provided with a gas release port. 1. A seat belt device with an air bag, comprising: a lock release device for releasing the lock of the seat belt by the lock device when the air bag is inflated.