JPH04108049A - Starter device - Google Patents

Abstract

PURPOSE:To surely actuate a plurality of actuators by actuating the one actuator by igniting a cap through the displacement of an energizing means from the second position to the first position and simultaneously the other actuator by moving a contact means, at the time of sudden deceleration of a vehicle. CONSTITUTION:When a vehicle is rapidly decelerated, a ball 44 is large inertia- moved in a direction C to rotate a drive shaft 46 in a direction E with a supporting shaft 46C serving as the center, and a stopper part 46B is dislocated from a flange part 54B of an igniting pin 54. In this way, the igniting pin 54 is moved in a direction D by energizing force of a compression coil spring 58 to collide against a cap 62, and an air bag in a driver's seat side is inflated. On the other hand, on the halfway of moving a movable contact 150, integrally formed with the compression coil spring 58, in the direction D according to extending the compression coil spring 58, the second terminal 160 of the contact 150 is brought into contact with the fourth terminal 176 of a fixed contact 162, and an air bag in an assistant driver's seat side is actuated by conducting the movable contact 150 to the fixed contact 162.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a starting device that operates a plurality of actuators when a vehicle suddenly decelerates.

[Conventional technology]

There are various types of actuators that operate when a vehicle suddenly decelerates, and among them, a case will be described in which an electrically ignited air bag device is installed in both the driver's seat and the passenger's seat.

In this type of airbag device, sensors that detect sudden deceleration of the vehicle are arranged near both front axles of the vehicle. These sensors are connected to the main body of the electrically ignited airbag system installed in the steering wheel of the driver's seat, the control device installed near the center console, and the airbag system for the passenger seat via wire connections. Connected to the main body, etc.

When the vehicle suddenly decelerates, one of the sensors disposed near both front axles detects this sudden deceleration, and the airbag device bodies for the driver's seat and the passenger's seat are activated, respectively, via a wire harness. As a result, the occupants seated in the driver's seat and the front passenger seat are protected by the respective inflatable bags.

[Problem to be solved by the invention]

However, in this type of airbag device, high reliability is required for the wire harness that connects the sensors near both front axles of the vehicle and each airbag device body. Since the electrical signal from the lever sensor must be reliably sent to the airbag device body through the wiring group in the wiring harness, it is necessary to use a wiring harness that strongly protects the wiring group, and the entire airbag device This led to an increase in costs.

In addition, this type of airbag device requires sensors near both front axles in addition to the wire harness mentioned above, which increases the number of parts and complicates the structure, which also increases the cost of the entire airbag device. It was connected.

The present invention has been made in consideration of the above-mentioned facts, and an object of the present invention is to obtain an activation device that can be simplified in structure and that can reliably operate a plurality of actuators when a vehicle suddenly decelerates.

[Means to solve the problem]

The present invention is a starting device that operates a plurality of actuators that are activated when a vehicle suddenly decelerates, with a single starting device main body, wherein the starting device main body includes an inertial body that moves by inertia when a vehicle suddenly decelerates, and the inertial body that moves inertia when a vehicle suddenly decelerates. an ignition member that moves in the direction of the detonator to collide with the detonator and actuate one actuator; and an ignition member that moves in the direction of the detonator by being displaced from a first position to a second position. (20) a first contact means provided integrally with the urging means; and a second contact means of the urging means;
a second contact means provided at a position that interferes with the movement locus of the first contact means that moves by displacement from the position to the first position; the first contact means and the second contact means; control means for inactivating the other actuator when the first contact means and the second contact means are in contact with each other; It is characterized by

[Effect]

According to the above configuration, when the vehicle is normally running, the acceleration applied to the inertial body is small, so the inertial body does not move or the amount of inertial movement is small. Therefore, the biasing means is not displaced from the second position to the first position. Therefore, the ignition member does not move toward the detonator. As a result, one actuator does not operate. Also, in this state,
Since the biasing means is not displaced from the second position to the first position, the first contact means is also not displaced. Therefore, since the first contact means and the second contact means do not interfere with each other, that is, the first contact means and the second contact means are in a non-contact state, the other actuator It is deactivated by.

When the vehicle suddenly decelerates from this state, the acceleration applied to the inertial body increases, so the biasing means moves from the second position to the first position.
Displaced to the position. Therefore, the ignition member moves toward the detonator and collides with the detonator. The second detonator ignites and the first actuator is activated.

Furthermore, the displacement of the biasing means from the second position to the first position causes the first contact means provided integrally with the biasing means to move. Since the movement locus of the first contact means interferes with the second contact means, the first contact means and the second contact means come into contact with each other. The control means therefore actuate the other actuators.

〔Effect of the invention〕

As described above, the activation device according to the present invention has the excellent effect of simplifying the structure and reliably operating a plurality of actuators when the vehicle suddenly decelerates.

〔Example〕

FIG. 2 shows an airbag device A on the driver's seat side according to this embodiment.
A schematic cross-sectional view of the airbag device B on the passenger seat side is also shown.

In the airbag device A on the driver's seat side, a hub 14 of a steering wheel 12 is fixed to the tip of a steering shaft 10, and a substantially box-shaped base plate 16 extends parallel to the hub 14 to support the substantially box-shaped support. It is supported via a bracket 18. Base play H6 has
A pad 20, a bag 22, and an inflator 24 are attached.

The pad 20 is arranged on the passenger side of the base plate 16 (the side opposite to the direction of arrow C in FIG. 1). A frame-shaped core metal (not shown) is embedded around the pad 20, and the base plate 16 is connected to the base plate 16 with rivets or the like via this core metal.
0 is fixed at the peripheral edge. Further, a thin wall portion 26 is formed at a portion of the pad 20 facing the base plate 16, and the pad 20 is easily broken at this thin wall portion 26.

The bag body 22 is arranged in a folded state on the passenger side of the base plate 16 and is connected to the base plate 16 and the pad 20.
is stored between. The opening side edge of the bag body 22 is attached to the approximate center of the base plate 16 via a ring plate 28. The ring plate 28 is fastened to the base plate 16 with bolts (not shown), and the bag body 2
The opening side edge of 2 is pressed against the base plate 16.

The inflator 24 has a cylindrical shape, and the base plate 1
6, and is arranged so as to pass through an elliptical hole. The inflator 24 has a flange 30 extending in the radial direction of the inflator 24 at an axially intermediate portion thereof.
is formed.

The flange 30 is attached to the base plate 16 with bolts (not shown).
It is fixed on the side opposite to the passenger. Also, Inflake 24
A plurality of gas holes (not shown) are formed at predetermined intervals on the circumferential surface of the vehicle on the passenger side. In addition, this inflator 24
A starter main body 32, which will be described later, is built into the shaft core of the starter main body 32, and an explosive charge (not shown) is disposed on the outer periphery of the starter main body 32, and a gas generating substance 34 is sealed.

The starting device main body 32 will be described in detail below with reference to FIGS. 1 and 3.

As shown in FIG. 1, the starting device main body 32 includes a substantially cylindrical upper case 36 and a lower case 38, and when the upper case 36 and the lower case 38 are fitted together, the inside of the cover 40 is The ends are fixed by caulking.

Inside the upper case 36, there is a cylinder 4 along the axial direction.
2 is disposed, and a ball 44 as an inertial body is accommodated in this cylinder 42. This ball 44 moves by inertia in the direction of arrow C in FIG. 1 when the vehicle suddenly decelerates. Note that two of each component in the starting device main body 32, including the ball 44, which will be described later, are arranged in symmetrical positions with respect to the axis of the starting device main body 32, but only one component will be explained below. do.

One end in the axial direction of a shaft 46A of the drive shaft 46, which is disposed within the contact surface between the upper case 36 and the lower case 38, is in contact with the end of the ball 44 on the side opposite to the passenger. This drive shaft 46 has a shaft 4.
A locking portion 46B is formed in the vicinity of the axially intermediate portion of the shirt 6A so as to be orthogonal to the shirt 46A, and a pair of support shafts 46C protrude from the locking portion 46B so that the upper case 36 and the lower case 38 come into contact with each other. It is pivoted at a position within the contact surface.

A bias pin 50 that is biased by a bias spring 48 is disposed inside the upper case 36, and the tip of the bias pin 50 is in contact with the other end of the shaft 46A of the drive shaft 46. .

Inside the lower case 38, a coil spring 52 is arranged on the side opposite to the ball 44 with the shaft 46A of the drive shaft 46 as the center. The coil spring 52 includes a coil portion 52A and a hook portion (not shown) that protrudes radially from the passenger side end of the coil portion 52A.

Although the hook portion is not shown in FIG. 1, the coil portion 5
The 2A side is locked to a release pin (not shown) inserted into the axis of the starter main body 32, and the tip end is locked to the other ball (in FIG. 1, the ball 44 is centered around the axis of the starter main body 32). (opposite position) is located at the opposite end of the passenger side. Before the airbag device A is assembled to the steering wheel 12, the coil spring 52 prevents the other ball from moving in the inertial movement direction and from rotating the drive shaft 46, but after the airbag device A is assembled, , the release pin is pressed by the protrusion 18A of the support bracket 18 and the coil spring 52
By moving toward the passenger side against the urging force of the hook portion, the device main body 32, which is configured from the above-mentioned position, is brought into an operable state.

Furthermore, an ignition bottle 54 (also shown in FIG. 3) serving as an ignition member is disposed within the starter main body 32.

The ignition pin 54 has a shaft portion 54A, and a flange portion 54B is formed in the axially intermediate portion thereof. Further, a disc-shaped locking plate 54C is integrally formed on the passenger side surface of the collar 54B, and a stepped portion formed by the locking plate 54C and the collar 54B is connected to the drive shaft 46. Locking part 4
6B is locked. The portion of the shaft portion 54A on the side opposite to the passenger is inserted into a cylindrical spring support portion 56 formed within the lower case 38. Further, a detonator 62 is disposed on the movement trajectory of the ignition pin 54.

Now, a compression coil spring 58 is wound around the outer circumferential portion of the spring support portion 56 as a biasing means. The passenger side end of the compression coil spring 58 is connected to the collar 54B of the ignition pin 54.
The compression coil spring 5 is held in contact with the opposite surface of the
The end portion on the side opposite to the passenger of the lower case 8 is abutted and locked to the bottom portion 38A of the lower case 38. Therefore, the compression coil spring 58 presses and biases the ignition pin 54 in the direction of the detonator (in the direction of the arrow in FIG. 1).

The compression coil spring 58 has a first
A disk-shaped movable contact 150 serving as a contact means is integrally formed with the compression coil spring 58. Due to this contract, the movable contact 150 moves to the first position as the compression coil spring 58 expands.
Move in the direction of the arrow in the diagram. This movable contact 150 is made of an insulating material.

The movable contact 150 has a spring support portion 56 at its axis.
A circular hole 152 with a slightly larger diameter than the 20 circular hole 15 is formed.
A spring support portion 56 is inserted into the spring support portion 2 . Therefore, the outer circumferential surface of the spring support 56 and the inner circumferential surface of the movable contact 150 are always separated from each other, and when the compression coil spring 58 expands during sudden vehicle deceleration, the inner circumferential surface of the movable contact 150 and the spring support No energy is lost due to contact with the outer peripheral surface of 58.

Further, a first terminal 154 is disposed on a part of the outer periphery of the passenger side surface of the movable contact 150. One end of a wiring 156 is connected to the first terminal 154, and an intermediate portion of the wiring 156 is guided out of the starter main body 32 through a small hole 158 formed in the bottom 38A of the lower case 38. moreover,
A second terminal 160 is disposed on the passenger side surface of the movable contact 150 at a position radially opposite to the first terminal 154. The first terminal 154 and the second terminal 160 are connected to each other by printed wiring (not shown).

A fixed contact 162 as a second contact means is arranged adjacent to the movable contact 150.

This fixed contact 162 is formed by bending an elastic conductive material. That is, the fixed contact 162 is formed by bending the longitudinal middle part of the rectangular conductive material so that both longitudinal ends of the conductive material are parallel to each other in plan view. One end 162A is connected to the bottom 38 of the lower case 38.
It is fixed to a rectangular convex portion 164 provided at A so as to protrude toward the passenger side.

One end 162A has a third terminal 1 on its passenger side surface.
68 is formed, and the wiring 1 is connected to this third terminal 168.
One end of 70 is connected. The middle portion of the wiring 170 passes through a small hole 174 formed in the bottom 38A of the lower case 38 and is guided out of the starting device main body 32.

Further, at the other end 162B of the fixed contact 162, a fourth
A terminal 176 is provided. The fourth terminal 176 is placed apart from the second terminal 160 on the movement trajectory of the second terminal 160. This separation distance is within the movement stroke of the ignition pin 54, and when the ignition pin 54 moves toward the detonator 62 when the vehicle suddenly decelerates, the second terminal 160 of the movable contact 150 connects to the fourth terminal 176 of the fixed contact 162. interfere with
Conducted.

The state shown in FIG. 3(A) is a normal vehicle running state, and in this state, the second terminal 160 and the fourth terminal 176 are in a non-contact state. Note that the position of the compression coil spring 58 in this state, that is, the compressed position, is the second position of the biasing means. When the vehicle suddenly decelerates from this state as shown in FIG. 3(B), the second terminal 160 and the fourth terminal 176 come into contact and are electrically connected. Furthermore, after the second terminal 160 and the fourth terminal 176 come into contact as shown in FIG. 3(C), the fixed contact 162 uses one end 162A as a fulcrum and the other end 162B ) is elastically deformed to rotate in the direction of arrow F, but even if this state is
The contact state between the terminal 160 and the fourth terminal 176 is maintained. Note that the position of the compression coil spring 58 in this state, that is, the expanded and almost restored position is the first position of the biasing means.

As shown in FIG.
0, and is bent and hung on the side opposite to the passenger of the hub 14.

A connector 122 is provided at the end of the wire harness 120. This connector 122 is connected to a connector 130 of a roll connector 124, which will be described next.

The roll connector 124 has a hollow cylindrical shape, and a hollow cylindrical boss 126 is coaxially formed at the core of the roll connector 124 . The outer peripheral surface of the roll connector 124 is fixed to the vehicle body 70, and a steering shaft 1Ω is rotatably inserted into the boss 126. Roll connector 12
A ring-shaped groove 128 is formed in the end surface of the vehicle 4 on the passenger side.

The above-described connector 130 is disposed within the groove 128 and connected to the connector 122. This roll connector 1
A wire harness 132 connected to a connector 130 is accommodated within the wire harness 24 .

The wire harness 132 is wound around the boss 126 several times with ample space, and the connector 13 is attached to the end of the wire harness 132.
4 are provided. This roll connector 124 connects four contacts (two sets of movable contacts 150, fixed contacts 162 to control device 76).
The connection state of the wires 156 and 170 (number of wires 2) is reliably maintained. That is, since the wire harness 132 changes its winding diameter according to the amount of rotation of the steering wheel 12, even when the steering wheel 12 rotates to the maximum, the winding diameter of the wire harness 132 is only reduced or expanded, and the wire is not disconnected. It never happens.

The connector 134 is further connected to a connector 136;
The four wires 156 and 170 are branched from the connector 136. The other end of the wiring 170 of the fixed contact 162 is directly connected to the negative terminal of the vehicle power source 82. The positive terminal of the vehicle body power supply 82 is connected via a wiring 178 to a control device 76 that ignites an electric detonator 78 disposed in an electrically ignited airbag device B on the passenger seat side.

Further, the other end of the wiring 156 of the movable contact 150 is connected to the control device 76. Note that the wiring 177 is connected to the control device 7.
This is the negative power line of No.6.

The control device 76 is connected to a seat switch 86 on the passenger seat side via a wiring 88. This seat switch 86
indicates a contact point of a sensor (not shown), and this sensor detects whether or not an occupant is seated in the passenger seat. When the sensor detects that a passenger is seated in the passenger seat, the seat switch 86 is turned on.

Airbag device B on the passenger seat side has seat switch 86 set to O.
A current is allowed to flow to the filament only when the movable contact 150 and the fixed contact 162 are connected to each other, and when the current flows to the filament, Joule heat is generated, the electric detonator 78 ignites, and the gas The generator 90 reacts to inflate the bag 92.

Next, the operation of this embodiment will be explained.

Under normal vehicle running conditions, the ball 44 does not move or the amount of inertial movement is small, so the locking portion 46B of the drive shaft 46 comes off from the collar 54B of the ignition bottle 54 due to the biasing force of the bias spring 48. Never. As a result, the airbag device A on the operating speed side does not operate.

In addition, in this state, the ignition pin 54 is in the state shown in FIG.
are spaced apart from each other, and the second terminal 160 and the fourth terminal
The terminal 176 is not electrically connected. As a result, the air ts and Pg device B on the passenger seat side also do not operate. In this way, normal vehicle running conditions are maintained.

When the vehicle suddenly decelerates from this state, the ball 44 moves to the first position.
Large inertial movement in the direction of arrow C in the figure.

As a result, the drive shaft 46 rotates about the support shaft 46C in the direction of the arrow E in FIG.

As a result, the ignition pin 54 moves in the direction of the arrow in FIG. 1 due to the urging force of the compression coil spring 58 and collides with the detonator 62. As a result, the detonator 62 ignites and the gas generating substance 34 reacts via a booster (not shown), generating a large amount of gas. Accordingly, the bag body 22 expands, causing the pad 20 to break at the thin portion 26. The inflated bag 22 after being broken is interposed between the steering wheel 12 and the passenger. As a result, the occupant on the driver's seat side is reliably protected from impact when the vehicle suddenly decelerates.

On the other hand, in order to move the ignition pin 54 toward the detonator 62, the compression coil spring 58 is expanded as shown in FIG. It moves together with the compression coil spring 58 in the direction of the arrow in FIG. And this movable contact 150
During the movement, the second terminal 160 of the movable contact 150 comes into contact with the fourth terminal 176 of the fixed contact 162. The folded movable contact 150 and fixed contact 162 are electrically connected. moreover,
After the second terminal 160 and the fourth terminal 176 come into contact with each other, as shown in FIG.
The other end 16 of the fixed contact 162 as shown in C)
2B is shown in FIG. 3(C) with one end 162A as a fulcrum.
It bends slightly in the direction of arrow F. During this time, movable contact 1
50 second terminal 160 and fixed contact 162 fourth terminal 17
6 is maintained.

Here, if the passenger is not seated in the passenger seat, that is, if the seat switch 86 on the passenger seat side is not turned on, the judgment circuit of the control device 76 operates, and the second terminal 160 of the movable contact 150 is fixed. Regardless of whether or not the fourth terminal 176 of the contact 162 is electrically connected, this airbag device B
doesn't work.

However, when a passenger is seated in the passenger seat, that is, when the seat switch 86 is turned on, the control device 76
Since the determination circuit determines that an occupant is seated in the passenger seat, and since the second terminal 160 of the movable contact 150 and the fourth terminal 176 of the fixed contact 162 are electrically connected, the control device 76 connects the filament to the Electric current flows and Joule heat is generated, the electric detonator 78 ignites, and the gas generating agent 90 generates a large amount of gas. As a result, the airbag device B on the passenger seat side is activated and the bag 92 is inflated, thereby protecting the passenger seated in the passenger seat.

As described above, in this embodiment, a mechanically ignited airbag device A is disposed on the driver's seat side, an electrically ignited airbag device B is disposed on the passenger's seat side, and a compressor is installed in the activation device main body 32. Movable contact 1 that moves together when the coil spring 58 is expanded
50 is disposed, and the fixed contact 162 is disposed at a position that interferes with the movement locus of the movable contact 150. Therefore, the single activation device main body 32 activates the airbag device A on the driver's seat side and the airbag device A on the passenger's seat side. The airbag device B can be activated simultaneously when the vehicle suddenly decelerates.

Additionally, compared to the conventional case where electric ignition airbag devices are installed on both the driver's and passenger's seats, sensors and wire harnesses installed near both front wheels of the vehicle are no longer required. Therefore, the number of parts can be reduced and costs can be significantly reduced. Furthermore, since there is no need to secure space in the vehicle body for arranging sensors, wire harnesses, etc., there is an advantage in terms of design.

Furthermore, in this embodiment, the control device 76 prevents the airbag device B on the passenger seat side from operating when no occupant is seated in the passenger seat. can be prevented from operating unnecessarily, and can contribute to improving safety conditions.

Further, in this embodiment, a movable contact 150 is integrally formed at the intermediate portion in the expansion/contraction direction of the compression coil spring 58 that presses and biases the ignition pin 54 toward the detonator 62.
The other end 162B of the fixed contact 162 is arranged at a position where it interferes with the movement locus of the second terminal 160, and the one end 162
Since A is fixed to the protrusion 164 on the bottom 38A of the lower case 38, movement of the ignition pin 54 during sudden vehicle deceleration can be detected without contacting the ignition pin 54.
The airbag device B on the passenger seat side can be operated reliably without losing the kinetic energy until the ignition pin 54 collides with the detonator 62.

Furthermore, since both the movable contact 150 and the fixed contact 162 are disposed within the lower case 38, the shaft portion 54A of the ignition pin 54 is connected to the detonator 6 disposed on the passenger side of the starter body 32.
2, the movable contact 150 and the fixed contact 162 will not be affected by blowback when the detonator 62 ignites.

In this embodiment, the driver's seat side airbag device A is used as one actuator, and the passenger seat side airbag device B is used as another actuator. However, the present invention is not limited to this. The take-up shaft drive member of the preloader, which is installed in the webbing take-up device on the seat side and forcibly winds the webbing onto the take-up shaft when the vehicle suddenly decelerates, is installed as another actuator in the webbing take-up device on the passenger seat side. The present invention is applicable to any device in which a plurality of actuators are actuated by a single actuator, such as applying a take-up shaft drive member of a preloader having a similar structure.

Further, in this embodiment, the airbag device B on the passenger seat side is applied as the other actuator, but the invention is not limited to this.
It is also possible to apply both the above-mentioned preloader and the airbag device B separately provided in the rear seat so that not only the airbag device B on the passenger seat side but also the airbag device B in the rear seat is activated. You can.

Furthermore, in this embodiment, the control device 76 controls the movable contact 150
, the fixed contact 162 is only connected to the airbag device B on the passenger seat side and the seat switch 86, but there is also a failure memory that stores information in the event that the electrical ignition type airbag device B malfunctions for some reason. It may also be configured to connect to, etc.

Further, in this embodiment, the movable contact 150 is formed integrally with the compression coil spring 58 at the middle part of the compression coil spring 58 in the direction of expansion and contraction, and the wiring 156 is connected to the first terminal 1 of the movable contact 150.
54, but is not limited to this, for example, the wiring 1
56 is directly connected to the end of the compression coil spring 58 on the side opposite to the passenger, and a second
Any configuration can be applied as long as the movable contact that moves together with the compression coil spring 58 is electrically connected to the fixed contact, such as by integrally forming a tongue piece made of a conductive material with the terminal 160 on the compression coil spring 58. be able to.

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a cross-sectional view showing a state in which a main body of the starting device including a movable contact and a fixed contact according to the present embodiment is cut along the axial direction, and Fig. 2 is a sectional view showing a state in which the main body of the starting device is cut along the axial direction. FIG. 3 is a schematic configuration diagram of the airbag device on the driver's seat side and the passenger seat side to which the device is applied, and FIG. 3 explains the operation of the movable contact and fixed contact in FIG. It is an explanatory diagram. A... Airbag device (first actuator), B...
・・Airbag device (other actuator), 32・・
・Starting device main body, 44... Ball (inertial body), 54... Ignition pin (ignition member), 58... Compression coil spring (biasing means), 62... Detonator, 7G... Control Device (control means, starting device main body), 15
0: Movable contact (first contact means), 162: Fixed contact (second contact means).

Claims (1)

[Claims] (1) A starting device that operates a plurality of actuators that operate when a vehicle suddenly decelerates, with a single starting device main body, wherein the starting device main body includes an inertial body that moves by inertia when a vehicle suddenly decelerates; an ignition member that moves in the direction of the detonator and collides with the detonator to activate one actuator; and an ignition member that moves in the direction of the detonator by being displaced from the first position to the second position a biasing means for biasing the ignition member; a first contact means provided integrally with the biasing means; A second contact means provided at a position that interferes with the movement locus of the first contact means, and when the first contact means and the second contact means are not in contact with each other, other actuators are inactivated. and control means for activating the other actuator when the first contact means and the second contact means are in contact with each other.