JPH1183893A - Detecting device for collision on automobile body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To quickly operate an airbag device by immediately detecting the deformation of an automobile due to collision in the event of collision resulting from travel and collision against another automobile, even if the collision is not head-on but from one side along a diagonal direction or side-on. SOLUTION: A disconnectable conducting rod is split into an automobile body front conducting rod 1', a conducting rod 1" for a front door, and a conducting rod 1"' for a rear door, which are fixed, respectively, along the outer peripheral part of the front of an automobile body and the outer plates of the front and rear doors. Since the disconnectable conducting rod is long and can be disconnected over a wide range throughout its length, no matter which position the deformation of the outer plate is caused by impact the corresponding part of the disconnectable conducting rod mounted along the outer plate is curved and a conducting wire 3 attached to its tensile side is cut to cut off electricity, so that the ammeter 7 of an impact detector circuit 6 indicates zero. The impact detector circuit 6 is put into operation by means of the difference between the ammeter 7 and the ammeter 10 of a reference circuit 9, thereby operating an airbag safety device 15.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention
Also, the present invention relates to a vehicle body collision detection device for activating a safety device for protecting an occupant by instantaneously expanding an airbag when a vehicle body is deformed by a collision with another vehicle. 2. Description of the Related Art When a running automobile collides, an airbag is often provided to protect an occupant. However, the prior art detects a collision due to a change in inertia at the time of collision. Often done. [0003] In order to detect a collision due to a change in inertia, the vehicle body is deformed by the collision and decelerates.
Or, after the body is collided and deformed and pushed, the inertial object moves for the first time and is detected by this. It is hard to expect reliable detection of [0004] In order to solve the above-mentioned problems, at the time of a collision due to running or a collision with another vehicle, the collision of the vehicle body occurs not only in the front but also in the oblique side or the right side. It is necessary to immediately detect the deformation due to. For this reason, the present invention breaks the disconnectable conductive rod fixed along the entire circumference or a part of the outer peripheral portion of the vehicle body or along the bumper or the like by deformation of the vehicle body generated at the time of collision, and cuts the conductive wire attached thereto. Thus, a collision can be detected. [0005] In the present invention, in order to grasp a wide range of deformation of the vehicle body due to a collision, a disconnectable conductive rod 1 is shown in FIG. 1 as a vehicle front conductive rod 1 'and a front door conductive rod. 1 "and a rear door conductive rod 1"", which are fixed along the outer peripheral portion of the front part of the vehicle body and the outer plates of the front door and the rear door, respectively. The disconnectable conductive rod 1 has a long rod shape. Since the wire can be disconnected over a wide range over the entire length, no matter where the outer plate is deformed due to the collision, a portion corresponding to that of the disconnectable conductive rod 1 attached along the outer plate is bent. The conductive wire 3 attached to the pulling side is cut off, the power supply is cut off, and the ammeter 7 of the collision detection circuit 6 is turned off.
Becomes zero. The difference between the ammeter 10 and the reference circuit 9 activates the collision detection circuit 6, thereby activating the airbag safety device 15. As shown in FIG. 2, the structure of the disconnectable conductive rod 1 is a rod body made of a material having a relatively high rigidity, or a conductive line or a thin ribbon which is easily cut on one surface of a rod body 2 having a shape that is easily broken. Alternatively, a band 3 of adjacent small pieces is attached to be integrated. When an external force is applied in the direction of the arrow due to the collision, as shown in FIG. 3, when the conductive wire 3 is bent so as to be on the tensile side, the conductive wire 3 is pulled and cut, and the current is cut off to detect a collision. The circuit 6 is operated. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a disconnectable conductive rod 1 has a rod shape that is straight or partially curved as shown in FIG. 2 and can be disconnected over a wide range over its entire length. When the attached surface is bent so as to be on the tension side, the conductive wire is pulled and easily cut, so that a circuit which has been energized up to now can be cut off. The disconnectable conductive rod 1 is attached to the front outer periphery of the vehicle body in a bow shape as shown in Fig. 1, and is also mounted to the front and rear doors. However, a portion corresponding to that of the disconnectable conductor 1 is bent so that the conductive wire 3 attached to the pulling side is cut. The electric current generated by the power supply 12 enters the conductive rod 1 '''for the rear door on the left side of the vehicle body, and then is connected in series to the conductive rod 1' for the front door on the left side. The front door conductive rod 1 ″ is connected to the right rear door conductive rod 1 ″ ″ and enters the collision detection circuit 6. When the conductive wires 3 of the above-described serial conductive rods are deformed due to a collision, the conductive rods 1
If the breakage of the wire or the disconnection of the conductive wire 3 occurs at any point, the ammeter 7 of the collision detection circuit 6 becomes zero. However, the reference circuit ammeter 10 provided separately has the same current as before the collision. By detecting the difference between the two, the airbag safety device 15 can be started. As another example, if the detection circuit electromagnetic coil 8 and the reference circuit electromagnetic coil 11 are interposed in the above two circuits, the electromagnetic core 13 in it was at the center neutral position before the collision, but was detected by the collision. When the circuit electromagnetic coil 8 is interrupted, the magnetic force of the coil is lost, and the electromagnetic core 13 is connected to the reference circuit electromagnetic coil 1.
The airbag safety device 15 can be started by operating the limit switch 14 by being drawn to one side by the operation of 1. The power supply 12 is supplied by starting the engine or by a battery. When the power is not supplied, the electromagnetic core 13 maintains the neutral position, and the airbag safety device 15
Does not work. It is also possible to separate the front conductive rod 1 'of the vehicle body into bumpers and the front side surface of the vehicle body and put them in a circuit in series. As shown in FIG. 2, the structure of the disconnectable conductive rod 1 has a long rod shape that is straight or partially curved, and the conductive wire 3 is attached over the entire length.
The rod body 2 is desirably made of a material having a relatively high rigidity, for example, cut-out wood, synthetic wood made of compression-molded small pieces, a foamed inorganic material, or a material that is easily broken. As the conductor that is easy to cut, a sintered metal wire, a band, or a thin plate or foil having a large number of diamond-shaped holes as shown in FIG. According to the present invention, at the time of a collision caused by traveling or a collision caused by another vehicle, even if the collision is not the front but the oblique side or the right side, the deformation due to the collision of the vehicle body can be immediately detected. Then, the airbag device can be operated promptly.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram showing one embodiment of the present invention. FIG. 2 is a perspective view showing an example of a disconnectable conductive rod. FIG. 3 is a perspective view showing a state in which the conductive rod is broken by a bending force. [Description of Signs] 1... Disconnectable conductive rod 1 ′... Front body conductive rod 1 ″... Front door conductive rod 1 ′ ″… Rear door conductive rod 2. Reference numeral 3 denotes a conductive wire of a disconnectable conductive rod 4... A diamond-shaped hole drilled in a conductor 5... A detection circuit wire 6... A collision detection circuit 7... A detection circuit ammeter 8 ... a detection circuit electromagnetic coil 9. Circuit wire 10 Reference circuit ammeter 11 Reference circuit electromagnetic coil 12 Power supply 13 Electromagnetic core 14 Limit switch 15 Airbag safety device 16 Car body 17 Bumper

Claims (1)

Claims: 1. A body collision detection device for detecting a collision of a vehicle body and activating a safety device such as an air bag, the vehicle body being fixed along the entire circumference or a part of an outer peripheral portion of the vehicle body or along a bumper or the like. A collision detection sensor that breaks the broken wire due to deformation of the vehicle body generated at the time of a collision and cuts the conductive wire attached thereto, and a collision detection circuit that operates a safety device such as an air bag by the broken wire. And a vehicle collision detection device. 2. A rod body made of a material having a relatively high rigidity or a rod body having a shape that is easily broken, a conductive wire, a thin band, or a band of adjacent fine pieces that is easily cut is attached to one surface of the rod body to integrally form the rod body. None, when the attached surface is bent so as to be on the tensile side, the conductive wire is pulled and easily cut to cut off a circuit that has been energized up to now. The structure of the conductive rod that can be disconnected.