| 摘要 |
PURPOSE:To facilitate the rescue activity and the search activity at night by providing the switch of an automatic light emitting device instantly separated and turned on to emit light in the sea water, and sealing a battery box to prevent the infiltration of the sea water. CONSTITUTION:A main body 1 is divided into an automatic light emitting device and a handle/float storage section. The automatic light emitting device can be removed with a hand. It is automatically separated by buoyancy in the sea water or in the water, and a switch is automatically turned on. A conducting hollow ball is separated by buoyancy from a fixed plate and brought into contact with a positive electrode terminal to turn the switch on outside a battery box 5. A water-soluble insulating material is coated between the positive electrode and negative electrode of contacts utilizing the expanding force expanding when water is absorbed, thus the switch is instantly turned on in the sea water or in the water. |
