Patent ID: 8378967

Claim:
A wearable electrical apparatus comprising: a signal supply section having a pair of ring-shaped signal electrodes configured to be wearable around a conductor path on a body surface of a user where a closed annular conductor path is formed by contact of two body sites that are brought into or out of contact with each other through the body surface, and configured to apply an electrical signal to the body site formed between the pair of signal electrodes so that a first closed ring formation site and a second ring formation site are formed, the first closed ring formation site being formed between the pair of the signal electrodes with intervention of a point of contact between the two body sites in a path along the conductor path when the two body sites are in contact with each other, and the second ring formation site being formed as the body site sandwiched between the pair of signal electrodes without the intervention of the point of contact; a measuring section integrated with the signal supply section and configured to measure a physical parameter quantity of an electrical signal produced in the first closed ring formation side; and a detecting section configured to detect that the two body sites are brought into or out of contact with each other by a user's body movement based on the physical parameter quantity of the electrical signal measured by the measuring section.