Locking device

A locking device for locking a tongue, comprising:

• a main body having a tongue insertion port through which the tongue is inserted;
• a locking member for locking the tongue when the tongue reaches a predetermined position in the main body;
• a lock releasing operation member operated for releasing a lock of the tongue due to the locking member;
• a tongue guiding and discharging member provided in the main body so as to be slidably moved along an insertion direction of the tongue, wherein the tongue guiding and discharging member is slid along the insertion direction of the tongue in the main body to guide the tongue until the locking member locks the tongue when the tongue is inserted into the main body through the tongue insertion port and discharge the tongue from the main body when the lock of the tongue due to the locking member is released;
• a power generator fixedly provided in the main body, wherein the power generator has an operation member pushed by the tongue guiding and discharging member slid in the main body along the insertion direction of the tongue and pivotally moved in a plane parallel to the insertion direction of the tongue when the tongue is inserted into the main body, and wherein the power generator generates electric power by utilizing external force applied from the tongue guiding and discharging member through the operation member;
• and
• a wireless transmitting part driven by the electric power generated by the power generator.