JPH03164347A - Crew protecting device - Google Patents

Abstract

PURPOSE:To reduce the relative speed between a crew and a vehicle body at the time of collision and improve safety by providing a low-deceleration generating mechanism easily deformed by a collision load and a mechanism releasing the lock mechanism of a seat at the time of collision and again locking it when the relative movement between the crew and the vehicle body is stopped. CONSTITUTION:When a vehicle frontally collides, low deceleration is generated on a vehicle body by a low-deceleration generating mechanism 1 at the initial stage of collision. A collision detecting sensor 2 detects collision, a signal is sent from a control unit 3 to a seat slide unit 5, a reclining unit 6 and an air bag device 4, then an inflator 52 is ignited, and an air bag 53 starts to be deployed. solenoids 18 and 44 are operated, and the lock of units 5 and 6 is released. The mechanism 1 is deformed by a low load, a crew is moved at a reduced speed and starts to be moved at a low relative speed against a vehicle body together with a seat 8, and the air bag 53 completes its deployment to hold the shape during this time. Units 4 and 6 are again locked by the stop of the relative movement between the seat 8 and the vehicle body.

Description

[Detailed description of the invention] Industrial applications The present invention relates to an occupant protection device.

2. Description of the Related Art As a conventional occupant protection device, there is, for example, one shown in FIG. 8 (see Japanese Patent Laid-Open No. 64-90842).

That is, in an emergency such as a car collision, the occupant 101 moves due to inertia and collides with the steering wheel 102, etc. In order to protect the occupant from the risk of a secondary collision, the gas is rapidly filled from the center of the steering wheel 102. The airbag 103 is inflated, and the occupant 101 and the steering wheel 102 are inflated.
This prevents collisions.

Problems to be Solved by the Invention However, in such a conventional occupant protection device, the occupant 101 cannot move the steering wheel 1 due to the relative speed caused by the difference in deceleration between the vehicle body 104 and the occupant lot.
When interfering with the vehicle body 104 side unit such as 02,
Since the airbag 103 absorbs the energy of the 01 by deforming, when the collision speed of the vehicle increases, such as in a collision at high speed, the vehicle body 104 and the occupants lol
The relative speed with respect to the steering wheel 103 also increases, and the energy 7 that the occupant 101 has when interfering with the steering wheel 103 and the like also increases, so there is a problem that the air pack must be made large.

The present invention has been developed by focusing on these conventional problems, and its purpose is to reduce the relative speed between the passenger and the vehicle body at the time of a collision, thereby increasing the safety of the passenger. It is intended to provide a protective device.

Means for Solving the Problems Therefore, the present invention provides a reduction speed generation mechanism that is provided at the front of the vehicle body and easily deforms when subjected to a load due to a collision, and a seat locking mechanism that releases the seat lock mechanism in the event of a collision. and a mechanism that locks again when there is no movement relative to the
At the initial stage of a vehicle collision, the deceleration of the vehicle body is lowered and the seat is moved so that the occupant can be restrained by the vehicle body and the seat.

In the early stages of a collision, the vehicle decelerates at a low rate, and the seat moves forward, trapping the occupant between the seat and the vehicle body.

After that, while maintaining this state, the vehicle accelerates at the same high deceleration rate as before.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. Figures 1 to 5
The figure shows an embodiment of the present invention.

First, the configuration will be explained. In Figure 1 showing the overall configuration,
1 is a low deceleration generating mechanism for decelerating the vehicle at a low deceleration in the initial stage of a vehicle collision; 2 is a collision detection sensor that outputs a collision signal to the control unit 3;

4 is an air bag device, which is inflated by a signal from the control unit 3; 5 is a seat slide unit and control unit 3
The seat cushion 8 is set in a free or fixed state with respect to the vehicle body (not shown). 6 is a reclining unit that locks or frees the reclining of the seat back 9 in response to a signal from the control unit 3.

A sheet movement amount detection sensor 7 detects the movement amount of the sheet 8 and outputs a signal to the control unit 3.

Next, each unit will be explained.

FIG. 2 shows an example of a low deceleration generating mechanism l. The figure shows a bellows structure that deforms under low loads, and is incorporated into the bumper stay and vehicle body structure. Alternatively, configure a separate device and attach it to the front end of the vehicle body. Note that the structure is not limited to a bellows structure as long as it is deformed under a predetermined load.

FIG. 3 shows an example of the locking mechanism of the seat slide unit 5. The figure shows the component parts exploded, and the seat slide unit 5 has three rails I1.12.13, first, second, and third, combined so that they can slide in three layers.

Gear on the first rail 1l! 4 is rotatably fixed by a pin 15 and meshes with the teeth of a spur gear 16 provided inside the second rail I2. Gear +4 is stopper 17
It is configured so that rotation can be controlled by locking or freeing the rotation by moving it in and out using a solenoid l8. The stopper 17 is fixed to the solenoid l8 with screws (not shown), and a spring 19
4 so that the gear 14 does not rotate under normal conditions.

Further, the solenoid 18 is fixed to a metal fitting 20 with screws 2I, and the L metal fitting 20 is fixed around the 1st rail 11 with rivets or the like, and the 1st rail is fixed to the vehicle body (not shown).

The third rail 13 is configured to be able to slide on the outside of the second rail 12, and the lock handle 22 is rotatably attached to the third rail l3 via a bracket 23. A lock plate 24 is crimped onto the lock handle 22. The lock plate 24 is urged by a spring 25 toward a lock pin 26 provided on the second rail 12, and the lock pin 26 is inserted into a hole 27 formed in the lock plate 24. The rail 13 is the second rail l
Make sure not to slide on the outside of 2.

The third rail 13 is fixed to the seat cushion 8 by a bracket 28.

FIG. 4 illustrates an example of the reclining unit 6. In the reclining unit 6, a base plate 31 is fixed to the seat cushion 8, and a knobby plate 32 is fixed to the seat back 9j.

The notch plate 32 is rotatably attached to a pin 33 provided on the base plate 3l, and is rotated by a coiled spring 34.
The notch plate 32 is biased toward the L4 side. One end of the existing spring 34 is fixed to the notch 35 of the pin 33, and the other end is hooked and fixed to the claw 36 of the notch plate 32.

The lock handle 37 is attached to the pin 3 on the base plate 3l.
8, and a plate 40 is fixed to the lock handle 37 via a spacer 39.
Plate 40 is rotatably attached to pin 38.

4I is a lock gear, one side of which is rotatably attached to the base plate 31 via a pin 42, and the lock gear 4!
The solenoid 44 is attached to the bracket 43 provided on the screw 45.
The tip 46 of the pin of the solenoid 44 is fitted into the hole 47 of the pin 42. The other side of the lock gear 4l is sandwiched between a lock handle 37 and a plate 40 and supported by a spacer 39.

The lock gear 4l is rotated by a spring 48 on one side and a lock handle 37 on the other side pulled counterclockwise in the figure by a spring 49, so both are urged upward and mesh with the teeth 50 of the notch plate 32. So,
Normally, the notch plate 32 is locked and the seat back 9 is fixed.

FIG. 5 shows an example of the air pack device 4. The air pack device 4 is attached to the center of the steering wheel, and in the event of an emergency such as a collision, an inflator 52 is ignited by a signal from the control unit 3, and the air pack device 4 is injected into a bag 53 that is normally folded as shown by the solid line. Gas is sent to rapidly expand it to the state shown by the two-dot chain line. In this example, a small airbag 54 is also inflated at the end of the steering wheel 5l.

Next, the operation will be explained according to the flowchart of FIG. 6 showing the operation of the apparatus of the present invention.

When a vehicle collides head-on (61), at the initial stage of the collision, the reducing speed generating mechanism 1, which generates a low deceleration as shown in FIG. 2, generates a low deceleration in the vehicle body as shown in FIG. 7a (61). 2) At the same time, collision detection sensor 2
A collision is detected (63), and a signal is sent from the control unit 3 to the seat slide unit 5, reclining unit 6, and airbag device 4, and the signal causes the inflator 52 to fire, causing the airbag 53 to fire as shown in FIG.
As shown by the dotted chain line, deployment is started (64), and at the same time, the solenoid l8 of the seat slide unit 5 and the solenoid 44 of the reclining unit 6 are activated.
The seat slide unit 5 and reclining unit 6 are unlocked (65).

The low deceleration generating mechanism l deforms under a low load, and the occupant moves at a reduced speed, so the seat 8 is moved at a low relative speed to the vehicle body.
and begins to move (66). Meanwhile, airbag 53
ends the expansion (67) and retains the shape. Note that in this embodiment, the bag is not provided with holes for releasing gas.

After that, the occupants placed the seventh airbag in the airbag 53, which had finished deploying.
It overturns at a low deceleration as shown in Figure b, is received by the wide area of the bag (68), and completes its movement at a low deceleration while deforming the airbag 53 (69). During this time, the seat cushion 8 moves forward together with the occupant, and the seat back 9 is tilted forward to restrain the occupant.

In this state, when the seat movement amount detection sensor 7 determines that the relative movement of the seat with respect to the vehicle body has stopped, a signal is sent from the control unit 3 to the solenoid I8 of the seat slide unit 5 and the solenoid 44 of the reclining unit 6. , respectively lock the seat slide unit 4 and the reclining unit 6 again (70). As a result, the occupant can use the airbag 53 and the seat cushion 8.
Then, it is caught and restrained by the seat back 9, and there is no relative speed with the vehicle body (7l).

After that, as in the past, the vehicle generates a high deceleration as shown in Figure 7a due to the deformation of the vehicle body components such as the front side members and cross members (72), and absorbs the energy of the vehicle body due to the collision (73). End the collision (74). During this time, as shown in FIGS. 7a and 7b, only the deceleration generated by the vehicle body acts on the occupant, and no deceleration due to interference with the vehicle interior unit occurs.

Therefore, the occupant receives only the minimum amount of deceleration in the event of a vehicle collision, and does not receive any impact.

As described above, in this embodiment, since the occupant can be reliably restrained, the air pack can be made smaller.

Furthermore, although both the reclining and sliding locking mechanisms are released in the above-described embodiments, only one of them may be released.

Furthermore, although the occupant was restrained by sandwiching the air pack between the seat and the air pack, this is not the only option; it could also be sandwiched between other body parts such as the steering wheel or the 21 pad.

Effects of the Invention Since the structure is as explained above, according to the present invention, an occupant who is not restrained by a belt can be protected by the minimum amount of deceleration that is applied in the event of a vehicle collision, thereby preventing the occurrence of impact. do. Furthermore, safety devices such as airbags can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an overview of the present invention, FIG. 2 is a side view showing an example of a reduction speed generating mechanism, and FIG. 3 is an exploded perspective view showing the constituent units of the seat slide unit.
Fig. 4 is an exploded perspective view of the constituent units of the reclining unit, Fig. 5 is a side sectional view showing an example of the airbag device, Fig. 6 is a flowchart showing the operation of the device of the present invention, and Fig. 7a is FIG. 7B is a diagram showing the deceleration of a vehicle body during a vehicle collision, FIG. 7B is a diagram showing the deceleration of an occupant during a vehicle collision, and FIG. 8 is a side view showing a conventional occupant protection device. ! ... Reduction speed generation mechanism, 2... Collision detection sensor,
3... 1+111 unit, 4... Air pack device, 5... Seat slide unit, 6... Reclining unit, 7... Seat movement amount detection sensor, 8
... Seat cushion, 9... Seat back, I1
,12.13...rail, l4...gear, z6...
・Spur gear, 17... Stopper 18... Solenoid, 19... Spring, 31... Base plate, 32... Notch plate, 34... Winding spring, 3
7...Lock handle, 38...Pin, 39...
Spacer, 40...Plate, 4l...Lock gear, 44...Solenoid, 52...Inflake. Figure 5 Figure 7a

Claims (1)

[Claims] (1) A reduction speed generating mechanism that is installed at the front of the vehicle body and easily deforms when subjected to a load from a collision, and a mechanism that releases the seat locking mechanism in the event of a collision and locks it again when the occupant stops moving relative to the vehicle body. An occupant protection device that reduces the deceleration of the vehicle body at the initial stage of a vehicle collision and moves the seat to restrain the occupant between the vehicle body and the seat.