Patent ID: 8238969

Claim:
A mobile device comprising: a trigger having a rod-like body fixed at one end; a housing having a first hole into which the rod-like body is inserted, the first hole being taperingly formed such that an entrance portion of the hole is larger in diameter than the rod-like body and a step is formed at a predetermined place between both ends of the hole; a sensor for detecting that the trigger has been operated in the direction in which the rod-like body is pulled from the hole; a buzzer activated in response to the sensor's having detected the operation of the trigger; a firmly fitted member in which a second hole is formed so that the rod-like body is inserted in the second hole so as to be freely slid forward or backward against the second hole, the firmly fitted member being firmly fitted in the entrance portion of the first hole; and a sealing member disposed between the step and the firmly fitted member in the first hole so as to be in contact with the internal wall of the first hole and the rod-like body.