Alarm device for diaper

Abstract

An alarm device for a diaper includes a substrate, a cathode partially covering a surface of the substrate, an anode partially covering the surface of the substrate and spaced from the cathode, an absorbent layer covering the surface of the substrate and connecting the cathode and the anode, and an alarm electrically connecting with the cathode and the anode. The absorbent layer is made of polymer material containing electrolyte. Once the absorbent layer absorbs water, the ions of the electrolyte in the absorbent layer can move so that a battery is formed with the cathode and the anode to turn on the alarm. By means of the aforesaid arrangement, the alarm device of the present invention sends out warning while the diaper is wetted by urine or water. There is no battery-exhausting problem so that the alarm device is convenience in use.

Dependencies are inferred from the claim text.