JPH11153613A - Impact detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To visually detect an operating state of a device from the position of a reset member, by a method wherein a turning-on member which is operated according to an electric contact operation and an electric contact release operation is installed between a fixed electrode and a moving electrode. SOLUTION: When an impact at a prescribed value or higher is generated, a ball 3 is subjected to an acceleration due to the impact, it is rolled on a slope 21a, it pushes a shaft member 4 upward, it is then removed from the tip of the shaft member 4, and a shaft member 6 is moved downward due to the urging force of a spring 8, thereby, coupling the shaft member 6 to the contact member 72 of a lever member 7, and turning the lever member 7 downward. When the lever member 7 is turned, the contact of a protrusion part 74 with a wall part 13 is released, and the lever member 7 is moved to the left by a reaction force due to the flexure deformation of a contact 51 of a moving electrode 5. As a result, the flexure deformation of a contact 41 is eliminated, the contact 51 is released from the contact 41 of a fixed electrode 4, both electrodes 4, 5 are set to a noncontinuity state, and an impact detecting device 100 is set to an OFF state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impact detection device for operating an airbag, a seatbelt pretensioner, a fuel cut device, or the like mounted on a vehicle.

[0002]

2. Description of the Related Art As a conventional impact detecting device, Japanese Patent Application Laid-Open No. Sho.
The thing shown in 8-502120 is known. This includes a ball disposed on a conical slope in the housing and capable of rolling on the conical slope, a shaft member movably supported in the housing and capable of contacting the ball, and a fixed electrode fixed in the housing. And a movable electrode that is disposed in the housing near the fixed electrode and is brought into and out of contact with the fixed electrode by movement of the shaft member.

In this conventional device, the fixed electrode and the movable electrode are always in contact with each other, whereby the device is on. In this state, when an impact is input and the ball rolls on the conical slope, the shaft member moves and the fixed contact and the movable contact are released from contact. This allows the device to:
It turns off.

In this conventional device, a reset member is connected to the shaft member, so that the on-state and the off-state of the device can be visually checked at the position of the reset member according to the movement of the shaft member, and the reset member can be connected to the reset member. By operating the device, the device can be returned from the off state to the on state.

[0005]

Generally, this kind of impact detecting device is provided at a position where it is difficult for the occupant to visually recognize the impact detecting device in order to suppress inadvertent operation by the occupant. Therefore, it is inevitably difficult to visually check the operation state of the apparatus from the position of the reset member.

Therefore, an object of the present invention is to make it easier to visually recognize the operation state of the device.

[0007]

The technical means taken in the present invention to solve the above-mentioned technical problem is to electrically connect between the fixed electrode and the movable electrode and to connect the fixed electrode and the movable electrode. A lighting member that operates in response to contact and release of contact.

According to this technical means, when the fixed electrode and the movable electrode are in contact with each other, the device is in an ON state,
The lighting member is turned off. When the contact between the fixed electrode and the movable electrode is released, the device is turned off, and the lighting member is turned on. As described above, the operation state of the device can be visually observed by the operation of the lighting member, and the operation state of the device can be more easily visually recognized than in the related art.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG.
The connector body 2 is accommodated in the housing 1 including the cover 1 and the cover 16. The connector body 2 is integrally provided with a concave portion 21 for accommodating a ball 3 described later and a connector portion 22 for retaining a fixed electrode 4 and a movable electrode 5 described later. The connector portion 22 penetrates through the housing 1 and is exposed to the outside. The bottom surface of the concave portion 21 is formed on a conical slope 21a.

The ball 3 is housed in the recess 21 and is free to roll on the slope 21a. The ball 3 comes into contact with the shaft member 6 described later and is held at the top of the slope 21a. The fixed electrode 4 is integrally fixed to the connector portion 22 by insert molding. One end of the fixed electrode 4 extends into the housing 1 to form a contact 41, and the other end of the connector portion 22 exposed outside the housing 1. The terminal 42 is located in the opening 22a. The movable electrode 5 is integrally held in the connector portion 22 by insert molding, and one end thereof extends in the housing 1 while approaching the fixed electrode 4 to form a contact point 51, and the other end thereof is connected to the housing 1. The terminal 52 is located in the opening 22a of the connector portion 22 exposed to the outside. Also, the contact 51 of the movable electrode 5
Are arranged so as to face the contact 42 of the fixed electrode 4,
In addition, it can be deformed by being pressed by contact with a lever member 7 to be described later.
And is electrically connected to the contact 41.

The shaft member 6 is supported in the housing 1 so as to be movable in the axial direction. The tip of the shaft member 6 is opposed to the apex portion of the slope 21 a of the concave portion 21 of the connector body 2, and can contact the surface of the ball 3. Around the shaft member 6, there is disposed a spring 8 having one end locked to the bearing portion 11 a of the housing 1 and the other end locked to the shaft member 6. The tip is constantly urged in the direction toward the apex portion of the slope 21a by the urging force, and the moving operation is performed by receiving the urging force.

The lever member 7 is movably and rotatably supported in the housing 1. One end of the lever member 7 has a contact portion 7 that can contact the contact 51 of the movable electrode 5.
1 is formed, and at the other end, a contact portion 72 that can contact the shaft member 6 is formed. Also, the lever member 7
On the side surface on the cover 16 side is formed a projection 74 projecting in a direction orthogonal to the longitudinal direction. The thus configured lever member 7 includes a contact portion 71 and a movable electrode 5.
The contact 51 is bent and deformed by the contact with the contact 51, and is brought into contact with the contact 42 of the fixed electrode 4. The contact portion 71 receives a reaction force due to the deformation of the contact 52 to perform the movement operation. Further, the lever member 7 receives the moving operation of the shaft member 7 by the engagement between the contact portion 72 and the shaft member 6, and performs a rotating operation.

The cover 16 of the housing 1 has a wall 13
Are formed facing the projection 74 of the lever member 7.
The wall portion 13 can be brought into contact with the projection 74, and the lever member 7 is brought into contact with the projection 74 by the contact between the projection 74 and the wall 13.
The movement of the movable electrode 5 is restricted in a state where the contact 1 is brought into contact with the contact 51 of the movable electrode 5 and the contact 51 is deformed. The shock detection device 100 thus configured operates as follows.

In FIG. 1, the ball 3 is located at the apex of the slope 21a of the concave portion 21. The tip of the shaft member 6 is in contact with the surface of the ball 3 so as to ride on the ball 3. The lever member 7 is held in a state where the wall 13 and the protrusion 74 are in contact with each other.
4, the movement of the lever member 7 is regulated,
The contact portion 71 is brought into contact with the contact 51 of the movable contact 5 so that the contact 5
1 is bent and the contact 51 is changed to the contact 41 of the fixed contact 4.
In contact with In this state, both electrodes 4,
The connection between the five terminals is made conductive, and the shock detection device 100 is in a shock non-detection state (ON state).

In this state, when an impact equal to or more than a predetermined value is generated, the ball 3 rolls on the slope 21a due to the acceleration due to the impact, pushes the shaft member 4 slightly upward, and then from the tip of the shaft member 4. Come off. When the contact between the shaft member 6 and the ball 3 is released, the shaft member 6
Move downward in FIG. 1 by the urging force of the spring 8. Thereby, the shaft member 6 and the contact portion 72 of the lever member 7 are engaged, and the lever member 7 is rotated downward in FIG. When the lever member 7 rotates, the protrusion 74 and the wall 13
Is released, and the lever member 7 moves leftward in FIG. 1 due to the reaction force due to the bending deformation of the contact point 51 of the movable electrode 5. As a result, as shown in FIG. 4, the bending deformation of the contact 41 disappears, the contact between the contact 51 and the contact 41 of the fixed electrode 4 is released, and the electrodes 4 and 5 become non-conductive,
The impact detection device 100 enters an impact detection state (OFF state).

As shown in FIGS. 2 and 3, the shaft member 6 has an arm 65 extending toward the cover 16 side.
Are formed. The reset member 15 is fixed to the tip of the arm 65. On the outside of the cover 16, a housing recess 16b communicating with the inside of the housing 1 and opening outside the housing is formed.
Are arranged in the accommodation recess 16b. The reset member 15 moves integrally with the movement of the shaft member 6, and is located in the housing recess 16b when the impact detection device 100 is turned on (FIG. 1).
In the off state (shown in FIG. 4) (see FIG. 4). The shaft member 6 has a projection 66 protruding toward the cover 16.
6 can be engaged with the lower surface of the lever member 7. Therefore, when the user pushes the reset member 15 into the housing recess 16b with a finger or the like in the off state of the impact detection device 100, the shaft member 6 moves upward in FIG. When engaged, the lever member 7 rotates upward in FIG. Thereby, the impact detection device 100
Can be returned from the off state shown in FIG. 4 to the on state shown in FIG. As shown in FIG. 5, a known fuel supply pump 101 of the vehicle is connected to a battery 107 of the vehicle via a known ignition switch 102 and a fuel cut switch 103 of the vehicle. The shock detection device 100 is electrically connected between the ignition switch 102 and the fuel cut switch 103 and is grounded via the ECU 104. The fuel cut switch 103 is turned on and off by the operation of the shock detection device 100. The relay is connected to the impact detection device 100 so as to be turned off. Further, an LED (light emitting diode) 105 is electrically connected via a resistor 106 in parallel with the shock detection device 100. The ECU 104 controls the operation of the fuel supply pump 101, as is well known, and the resistor 106 prevents an excessive current from flowing through the LED 105.

As shown in FIG. 1 and FIG.
Numeral 05 is held in the housing 1 so as to be exposed outside the housing 1, and is electrically connected to the fixed contact 4 and the movable contact 5 by an electric wire 105 a in the housing 1.

In such a configuration, normally, when the ignition switch 102 is turned on, the fuel cut switch 103 is turned on in response to the operation of the fuel supply pump 1 since the impact detection device 100 is in the on state.
01 operates by being supplied with power from the battery 107. At this time, both ends of the LED 105 are
Are at the same potential in the ON state of
5, no current flows, and the LED 105 is turned off.

When an impact is generated due to a collision of the vehicle and the impact detection device 100 is turned off, the fuel cut switch 103 is turned off in response to the operation of the impact detection device 100 and supplies power to the fuel supply pump 101. Is stopped. In addition, since the electric potential at both ends of the LED 105 changes when the impact detection device 100 is turned off, a current flows through the resistor 106, thereby
105 lights up.

The operation of the LED 105 described above may be such that the shock detection device 100 is turned off and blinks when the shock detection device 100 is turned off from the on state. The light may be turned off by being turned on by being turned off from the on state, and various operation variations can be taken.

[0021]

According to the present invention, since the lighting member which operates according to the contact and the release of the contact between the fixed electrode and the movable electrode is provided, the operating state of the device can be visually observed by the operation of the lighting member. The operation state of the device becomes easier to visually recognize than in the past.

[Brief description of the drawings]

FIG. 1 is a front view showing the internal structure of an impact sensing device according to the present invention.

FIG. 2 is a front view showing the appearance of the impact detection device according to the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2 of the impact detection device according to the present invention.

FIG. 4 is a front view, corresponding to FIG. 1, showing the operation of the impact detection device according to the present invention.

FIG. 5 is a diagram showing an electric circuit configuration of the shock detection device according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 housing 3 ball 4 fixed electrode 5 movable electrode 6 shaft member 21a slope (conical slope) 105 lighting member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kazuya Tanaka 2-3-3 Showa-cho, Kariya-shi, Aichi Prefecture Inside Ishin Engineering Co., Ltd.

Claims (1)

[Claims] A ball disposed on a conical slope in the housing and capable of rolling on the conical slope; a shaft member movably supported in the housing and abuttable on the ball; A fixed electrode fixed to the
In a shock detection device having a movable electrode that is disposed in the vicinity of the fixed electrode in the housing and is in contact with and released from the fixed electrode by movement of the shaft member,
An impact detection device having a lighting member that is electrically connected between the fixed electrode and the movable electrode and that operates in accordance with contact and release of the contact between the fixed electrode and the movable electrode.