Supporting device of a shaft drive of a magnetic record and reproduction device

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT OF THE INVENTION The present invention will be explained in reference to an embodiment shown in the attached drawings.
The numeral 1 designates a base of a mechanism.
Numeral 2 is a control motor secured to a vertical wall of the base such that a rotation shaft of the motor is arranged horizontally.
Numeral 3 designates a feed screw which is rotated reciprocally and angularly by control motor.
4 is a follower of needle shape which is placed at its end between the threads of the feed screw 3 and is moved in an axial direction of the screw by the rotation of the feed screw 3.
5 is a carriage which supports follower 4 horizontally at its end, and is movably supported on two guide shafts 7 provided horizontally on the base 1 so that it is movable on a magnetic disc set with the recording and reproducing head 6 in a normal position.
The numeral 8 denotes a pad arm which is swingably supported on the carriage 5, and moderately presses down the magnetic disc to the head 6 with a pad 9 provided at its end portion.
The numerals 10 (10) are support pins for holding the disc cassette 11, housing the magnetic disc therein in the normal position, said pin 10 being positioned in holes formed in the disc cassette 11.
The numeral 12 designates an eject button which is an operating member for taking out the disc cassette 11 accommodated in cassette holder 13 which is, at its one end, pivoted to the base 1 at pivot 14 and is, at the other end, biased downward by a spring 15.
If the eject button 12 is pushed, by an operator cassette holder 13 is upheld to a level of setting the disc cassette 11, via a cross member 16 cooperating with the end of the button, against the action of spring 15.
The numeral 17 denotes a spindle which is rotatably supported in the base 1 through a bearing 18, and is fixed with a spindle hub 19 at its upper portion, said spindle hub 19 being provided with a driving pin 21 secured to a spring plate 20 in its eccentric position.
The numeral 22 is a pulley which is fixed at the lower end of the spindle 17 and is rotated via a belt 24 by a motor 23 positioned on an appropriate portion of the base