| 摘要 |
A device for activating a switch includes a thread connected to a switc h and a hollow casing is connected to a free end of the thread. A body is received in the casing and a space is defined between the body and an inside of the casing. An earth line is connected to the body and extends through the casing so that when touching the casing or the earth line, the body is shake and contacts the inside of the casing to form a circuit to activate the switch.
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