A mode setting device for establishing various driving modes in a magnetic tape driving apparatus, comprises a cam member, and a cam guide member guided by the cam member to be shifted between a plurality of positions. And a brake member and a pinch roller are located in positions corresponding to a plurality of magnetic tape driving modes as the cam guide member is shifted between the plurality of positions.
In a magnetic tape recording and playback device, a resilient body is engaged with a head base. At the time of recording and playing back a tape, the head base is pressed and fixed when the resilient member is directly pushed by a drive plate, and at the time of withdrawing the head, the head base driven by the drive plate, through the resilient member, and the head base is pressed and fixed. In this way, a force given to the resilient body is reduced at the time of head base movement. It is possible to reduce the required head base drive force at the time of head base movement.
A VCR (Video Cassette Tape Recorder) deck tape loading mechanism comprising a first cam gear driven by a loading motor, and a second cam gear, and a loading gear, moving in response to the movement of the first cam gear. The first cam gear drives a pinch lever to a loading position and the second cam gear drives a take up arm so as to make it possible for the take up arm to guide the pinch lever. The loading gear drives a slant base to move along a rail on a base so that the tape is able to take the most optimum path because each moving part can move smoothly in sequence without interference from one another due to the independent movement of the pinch lever and the take up lever. A thinner model of the mechanism is made available by placing first cam gear and second cam gear on the bottom of main base and cam lever and take up lever above them.
In a magnetic tape recording and playback device, a resilient body is engaged with a head base. At the time of recording and playing back a tape, the head base is pressed and fixed when the resilient body is directly pushed by a lever, and at the time of withdrawing the head, the head base is directly driven by the lever, so that an engaging member of a main base is engaged with a pressing member, and the head base is pressed and fixed. In this way, a force given to the resilient body is reduced at the time of head base movement. It is possible to reduce the required head base drive force at the time of head base movement.
