| 摘要 |
PURPOSE:To always adjust a rocking body to a vertical position by sliding the rocking body with driving of a solenoid to bring the rocking body in the vertical position into contact with the inside wall surface of a case body. CONSTITUTION:A freely rockable rocking body 2 is provided in a case body 1, and a solenoid 3 is provided in the rocking body 2 and slides the rocking body 2. The rocking body 2 is fixed to both ends of a fixing plate 13 provided in the front end of a plunger 10 and is slided in accordance with movement of the plunger 10. The rocking body 2 rocked together with the solenoid 3 pivotally control to the case body 1 is moved toward the inside wall surface of the case body 1 by movement of the plunger 10 of the solenoid 3 and is brought into contact with this inside wall surface and is topped from shaking and is fixed in prescribed position. If a mercury ball stored in the rocking body 2 is brought into contact with an electric contact 11 at this time, the alarm preparation state is set; and if the mercury ball 4 is separated from the contact 11, that is, if a vehicle body is inclined, an alarm is operated to sound alarm. |
