DOOR LOCK EMPLOYING PUNCH CARD KEY RECOGNITION MECHANISM, AND HANDLE DEVICE FOR THE DOOR LOCK

摘要

The present invention relates to a door lock employing a punch card key recognition mechanism and a handle device for the same. The handle device for a door lock employing a punch card key recognition mechanism comprises a case, a handle, an elastic member for returning, a drive gear, a one-directional rotation inducing unit, and a motion transfer unit. The case is mounted on an outdoor side of a door. The handle rotates on the outside of the case back and forth between an initial position and an operational position. The elastic member for returning applies an elastic force to the handle in a direction in which the handle is returned to the initial position in the case. The drive gear is arranged coaxially with a rotational center axis of the handle in the case to rotate relative to the handle. The one-directional rotation inducing unit transfers a rotational force of the handle to the drive gear to rotate the drive gear in one direction only while the handle rotates from the initial position to the operational position when the handle rotates and returns once. The motion transfer unit receives a rotational motion of the drive gear to alternately output a forward rotational motion and a reverse rotational motion each time the handle rotates and returns once.