JPH0119614B2 - - Google Patents

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention provides a high-impact detection device having a high-impact detection mechanism that operates when a vehicle crashes, and an abnormal displacement detection device that activates a safety device when a vehicle rolls over. The present invention relates to a vehicle rollover detection device suitable for use in a so-called hybrid rollover high-impact detection device for vehicles, which is equipped with a vehicle rollover detection device having a detection mechanism, and more specifically relates to an improvement of an abnormal displacement detection mechanism of a vehicle rollover detection device. .

(Prior Art) Among vehicle accidents involving automobiles or motorcycles, especially those involving severe impact or serious damage to the vehicle body, fuel may flow out of the vehicle due to breakage of fuel pipes, etc. There is a risk that a spark from a short circuit in the electrical equipment will ignite, causing a vehicle fire and causing a serious secondary disaster.

Therefore, in conventional vehicles, detectors do not operate when the vehicle body accelerates at a low level, such as during sudden braking or when driving on rough roads, but only operate when a large acceleration of 10 G or more is applied to the vehicle body, such as during a vehicle collision.
In other words, a conventional low-acceleration detector is attached to the vehicle body by adding an elastic spring to lower the detection sensitivity, and when the detector is activated, the vehicle's power is cut off in the event of a collision, and electrical equipment is disconnected. Measures have been proposed to prevent the generation of sparks and to stop the installed engine (see Japanese Patent Publication No. 14496/1983).

However, actual vehicle accidents involve not only the above-mentioned collisions that cause severe impact, but also vehicle accidents that do not involve a high impact, such as rollover accidents caused by falls into rice fields or slips on icy or snowy roads. As many accidents involving injury are included,
For example, in modern automobiles in which the occupant restraint belt is moved between the open position and the restraint position by a motor drive, when a collision or rollover accident occurs, the door opens automatically and the belt automatically moves to the open position. There was no way to avoid the risk that the aircraft would be transferred to the ground and the crew would be left unrestrained.

Therefore, the present inventor assumed all kinds of abnormal situations when a vehicle accident occurs, and developed a mechanism for detecting high impact at the time of a collision (high impact detection mechanism) and a mechanism for detecting high impact when a vehicle rolls over.
By separately proposing a detector equipped with a mechanism for detecting abnormal displacement such as overturning (abnormal displacement detection mechanism) and connecting it to the electric circuit of the vehicle, we aim to solve the problems described above when vehicle accidents occur. I tried. However, in the rollover high impact detector proposed by the inventor, a sphere is housed in a vertically extending cylindrical cavity as the abnormal displacement detection mechanism, and a switch is installed in the upper part of the cylindrical cavity. By adopting this configuration, the distance between the spherical body and the switch at the upper part of the cylindrical cavity is made sufficiently large, and even if the spherical body is bounced up by vibrations due to vehicle vibrations caused by driving on a rough road, the above-mentioned spherical body is If the vehicle does not reach the switch position and cannot operate the switch, and an abnormal displacement such as a rollover occurs, the vertical position of the cylindrical cavity is reversed according to the overturning situation of the vehicle, so the sphere moves inside the cylindrical cavity due to gravity. The structure is such that the switch rotates until it reaches the switch position and operates the switch.

(Problem to be Solved by the Invention) However, in the conventional abnormal displacement detection mechanism as described above, when vertical vibrations are repeatedly applied to the vehicle body while driving on a rough road, the jump height of the sphere is adjusted accordingly. However, just like launching a ball, it synchronized with the vibrations of the car body and was amplified, until it finally reached the switch and activated it. This is because the upward vibration of the car body synchronizes with the moment when the ball, which was once thrown up, falls and collides with the bottom of the cylindrical cavity, causing a situation similar to that of the ball being launched from the bottom, and the ball repeats itself. Due to the fact that the result,
There was a problem in that the operation of the switch caused the engine to stop even though the vehicle body was within the normal range.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a vehicle abnormal displacement detection mechanism for a vehicle rollover detection device that does not cause malfunctions due to vibrations as described above.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the abnormal displacement detection mechanism for a vehicle of the present invention includes a case having a vertical cylindrical space, and a case that can be vertically rolled within the cylindrical space. a switch located at the top of the case and operated by the rolling of the sphere; a receiving member located at the bottom of the cylindrical space and having a curved recess for receiving the sphere; It is characterized by comprising an escape space that allows escape movement of the receiving member in the horizontal direction. In this case, the switch may be a non-contact switch.

(Function) The function of the present invention having the above-mentioned configuration is such that even if the vehicle body repeatedly vibrates vertically when driving on a rough road and the ball is thrown up in response, the ball that has been thrown up will not fall. Since it is received by the receiving member when it is flipped up, the height of the jump is not amplified.

(Examples) Hereinafter, specific contents of the present invention will be described in detail based on examples shown in the accompanying drawings.

The figure shows an example of the present invention. In the figure, 1 is a detector case consisting of a lower case 1a and a cap member 1b attached to the upper surface of the lower case 1a. A high impact detection mechanism 2, an abnormal displacement detection mechanism 3, a switch operating rod 4, and a switch 5, which will be described later, are built inside, and the mounting flange 6 provided at the lower end of the lower case 1a is attached to the floor of an automobile or a car using bolts or the like. It is assembled into a vehicle and used by fixing it to an appropriate vehicle body part 7, such as an indoor wall surface or a motorcycle frame.

The lower case 1a, which is one member of the detector case, is provided with a storage hole 9 vertically downward from its upper surface 8 for accommodating the high impact detection mechanism 2. A horizontal acceleration sensing member 11 called a standing weight is housed in the mortar-shaped bottom 10 in an erect state, and a cylinder member 12 fitted into the upper opening of the storage hole 9 is mounted on the upper surface of the sensing member 11. Center hole 13
The lower surface of the lower end large diameter portion 15 of the tappet member 14, which is vertically slidably inserted therein, is in contact with the lower surface.

Thus, the tapepet member 14 has a compression spring 1 interposed between the upper surface of the lower end large diameter portion 15 and the ceiling surface of the center hole 13 of the cylinder member 12.
6, and its upper end 17 is inserted into a through hole 18 bored from the center hole ceiling surface of the cylinder member 12 to the upper surface of the cylinder member, so that the upper surface of the cylinder member It can protrude upward.

Further, the lower case 1a has a cylindrical space 20 that forms a part of the abnormal displacement detection mechanism 3 of the present invention, extending from the upper surface 8 to the lower surface 19 at a position adjacent to the high impact detection mechanism housing hole 9. is bored in the vertical direction, and within the cylindrical space 20, a sphere 21 having a predetermined mass and having a diameter _D1 slightly smaller than the width W of the cylindrical space 20 rolls in the vertical direction. possible storage. The cylindrical space 20 having the configuration described above has a cylindrical relief space 22 having a diameter D ₂ larger than the cylindrical space 20 at its lower end side, and in the escape space 22, the upper surface has the cylindrical relief space 22. Curved recess 23 for receiving sphere 21
The lower opening of the escape space 22 is closed by a lower cover member 25.

Next, on the other hand, 26 in the figure is the cylinder member 1
2, the substrate is erected on the upper surface of the substrate 2
6 swingably supports the switch operating rod 4 by means of a pin 27 protruding from the side surface. The lower surface of the operating rod 4 on its proximal side is connected to the upper end 1 of the tappet member 14.
7, and the lower surface of the extension end side is the cylindrical space 2.
The convex portion 28 provided on the upper surface of the operating rod 4 is configured to be able to engage with the button 29 of the micro switch 5 fixed to the substrate 26. It is becoming.

The curved recess 23 formed on the upper surface of the receiving member 24 may have various shapes, such as an inverted conical shape in contact with the outer surface of the sphere 21 as shown in the figure, or a polygonal shape in point contact with the sphere 21. However, in order to prevent the above-mentioned lifting phenomenon of the sphere 21, the tangent line passing through the point of contact with the sphere 21 is always inclined at a predetermined angle with respect to the center line 1 of the cylindrical space 20. This is an effective mode.

The micro switch 5 attached to the board 26 is connected to the vehicle's electrical equipment circuit, for example, a fuel pump operating circuit, and is activated to stop the fuel pump when a vehicle accident occurs, or is connected to the engine's ignition circuit and activated. It is used by connecting to circuits suitable for various purposes, such as stopping the rotation of the engine at times, or connecting to the power supply circuit to shut off all electrical systems of the vehicle in the event of a collision or rollover. .

The abnormal displacement detection mechanism for a vehicle according to the present invention has the above-mentioned configuration. Next, we will discuss its function. First, when the vehicle is running normally without any abnormality, When the spherical body 21 vibrates within the cylindrical space 20 due to vibrations of the vehicle body during running, the spherical body 21 jumps up, and then falls into the curved recess 23 on the upper surface of the receiving member 24 and is received. At this time, the receiving member 24 also moves horizontally within the escape space 22 at the same time as the above-mentioned springing up. This is an effect that arises because the vibration direction of vehicle body vibration always has not only a vertical component but also a horizontal component. Therefore, sphere 21
However, when it falls back to its original position, the receiving member 24
has already escaped and moved within the escape space 22, so the sphere 21 and the recess 23 of the receiving member 24 contact at one point and collide. As a result, the vertical downward stress exerted by the sphere 21 on the receiving member 24 and the
The vertical upward stress applied to the sphere 21 is converted and consumed into a horizontal component force for returning the receiving member 24 to its original central position, and the receiving member 24 returns to its original central position. In this way, the energy that tries to raise the sphere 21 again is absorbed as the energy that causes the receiving member 24 to move back, so that the sphere 21
Even if the fall of the ball 21 and the upward vibration of the vehicle body 7 are synchronized, the height of the ball 21 jumping up is not amplified, the ball 21 does not reach the operating rod 4, and the switch 5 remains inactive.

On the other hand, if the vehicle collides with a high impact and a large horizontal acceleration (approximately 10 G or more acceleration) is applied to the vehicle body 7, the horizontal acceleration sensing member 11 will tilt due to its own inertial force. However, in order to push up the tappet member 14 against the elasticity of the spring 16, the upper end 17 of the tappet member 14 comes into contact with the lower surface of the switch actuating rod 4, pushing up the actuating rod 4, and the actuating rod 4 pushes up the micro switch 5. By pressing the button 29, the safety device is activated to prevent secondary damage in the event of a vehicle accident.

In addition, when the vehicle overturns or overturns, the vehicle body 7
without applying a high impact to the horizontal acceleration sensing member 1.
1 does not operate, the vertical position of the cylindrical space 20 is reversed according to the overturning situation of the vehicle.
The sphere 21 housed in the cylindrical space 20 rolls within the cylindrical space 20 due to gravity and collides with the switch operating rod 4, causing the operating rod 4 to swing upward. The button 29 of the micro switch 5 is pressed by the protrusion 28 of the rod 4, the micro switch 5 is activated, and the vehicle body 7 is notified of a large abnormal displacement such as overturning or overturning to the vehicle safety device.
It is possible to avoid secondary disasters such as vehicle fires, or to call for rescue by continuously sounding the horn.

In the above embodiment, a micro switch equipped with an internal contact point is used as the switch, and the micro switch is connected to the electrical equipment circuit of the vehicle. It is also possible to use a non-contact switch that turns on and off the sensor, and by taking advantage of the characteristics of such a non-contact switch, it is possible to eliminate malfunctions caused by rough or corroded contacts and improve the reliability of the detection device. I can do it. Therefore, when using the above-mentioned non-contact switch, a magnet is attached to the switch operating rod 4 so that the switch 5 is actuated by the swinging of the operating rod 4, or a magnet is attached to the switch operating rod 4 so that the switch 5 is operated, or a magnet is attached to the switch operating rod 4 so that the switch 5 is operated. The switch 5 is attached to the spherical body 21, and the spherical body 21 itself is made of a magnetic material.
It is necessary to make some modifications, such as detecting the displacement of the vehicle with a non-contact switch and controlling the vehicle's electrical circuit.

〔Effect of the invention〕

As described in detail above, according to the abnormal displacement detection mechanism for a vehicle of the present invention, the vertical movement of the sphere is absorbed by the receiving member, and its bouncing (upheaval) is prevented, and the vibration of the vehicle when driving on a rough road is prevented. Therefore, the sphere does not activate the switch, and the switch can be activated only when the vehicle exceeds the dangerous slope angle due to overturning, etc., and slopes approximately 90 degrees or more, and the switch is activated only when the vehicle is tilted within the normal slope range. While the sensor is inside the sensor, the abnormal displacement detection mechanism is reliably disabled, preventing the detector from malfunctioning and further improving vehicle safety.

[Brief explanation of drawings]

The figure is a sectional view showing an example of the abnormal displacement detection mechanism for a vehicle according to the present invention. 1...Detector case, 2...High impact detection mechanism,
3...Abnormal displacement detection mechanism, 5...Switch, 20
... Cylindrical space, 21 ... Sphere, 22 ... Escape space, 23 ... Curved recess, 24 ... Reception member.

Claims (1)

[Scope of Claims] 1. A case having a vertical cylindrical space; a spherical body housed in the cylindrical space so as to be vertically rollable; Vehicle rollover detection comprising: an actuated switch; a receiving member having a curved recess at the bottom of the cylindrical space for receiving the sphere; and an escape space that allows escape movement of the receiving member in the horizontal direction. Abnormal displacement detection mechanism for vehicles. 2. The abnormal displacement detection mechanism for a vehicle according to claim 1, wherein the switch is a non-contact switch.