Abstract: A loading completion of small and large diameter disks is mechanically controlled to provide a mechanical control of clamping operation and the like. An elongated hole of a third arm with a pin engagable with an elongated hole formed in a chassis couples with a pin mounted on a second arm. As a large diameter disk is loaded, the motion of the second arm is transmitted via the third arm to a slider. As a small diameter disk is loaded, the small diameter disk pushes a pin mounted on the third arm to rotate the third arm. The motion of the third arm is transmitted to the slider. The motion of the slider activates a power transmission mechanism which transmits power of the loading motor to a disk clamping mechanism and a driving mechanism for driving a loading roller supporting lever.

Abstract: A vibration proofing mechanism whose springs are not required to be newly extended when the mounting position of an apparatus using the mechanism is changed. Two types of vibration proofing springs extend between the cabinet of the apparatus and a floating chassis in different directions. A displacement adjusting spring extends between a spring latch movably supported by the cabinet and the floating chassis. The displacement adjusting spring corrects the displacement of the floating chassis relative to the cabinet caused by the force acting to the vibration proofing springs in the direction different from the direction of gravitational force.

Abstract: In a disc-record player comprising a turntable which is mounted for rotation in a frame there is provided a pressure lever which is pivotally connected to the frame by a spindle. The pressure lever comprises an arm portion and a pressure portion, the arm portion being connected to the frame by said spindle and the pressure portion being connected to the arm portion by another spindle which extends parallel to the first-mentioned spindle. The pressure portion carries a pressure member which can be moved towards the turntable from an inoperative position into a press-on position by pivoting the arm portion. In the press-on position the pressure portion exerts pressure on the pressure member via a ball, the ball and the pressure member being at least substantially coaxial with the turntable in the press-on position.