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US5927112A Theft detection mechanism and anti-theft device for vehicle 失效
车辆防盗检测机构及防盗装置

Theft detection mechanism and anti-theft device for vehicle
摘要:
A theft detection mechanism is provided with a top ring which is depressed when a foreign object other than a key is inserted into a key inserting hole. A sensor is provided for detecting that the top ring is depressed. A top ring is inevitably pushed down when a foreign object other than a key is inserted into a key inserting hole to activate the sensor, thereby reliably detecting a stealing action. Moreover, the structure of a theft detection mechanism is made simple to reduce the cost thereof.
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