Abstract: A disc drive is constructed from a main body which includes a mechanism unit having a disc rotating mechanism for rotating a disc and a play back mechanism for playing back information recorded on the disc, disc tray movably provided with respect to the main body for supporting a disc and a casing for housing the main body. The disc drive is provided with vibration absorbing members for suppressing transmission of vibration caused by high speed rotation of the disc from the main body to the casing. The vibration absorbing members are formed of elastical members and they are arranged between the side portions of the main body and the inside of the casing, thereby the main body is supported by the casing through the vibration absorbing members to prevent vibrations caused in the main body from being transmitted to the casing.

Abstract: A track ball coordinate data inputting device includes a coordinate data inputting ball rotatably accommodated in an accommodating portion of a frame; a pair of drivers abutted against the ball in two directions forming right angles, the drivers respectively having a rotary shaft supported at one end thereof, respectively; a pair of detecting members for detecting an amount of rotation of the ball, the detecting member including: a pair of encoders mounted near one end of the rotary shafts of the drivers, respectively; a pair of photo-sensers provided for the encoders, respectively, each photo-senser having a light emitting member and a light receiving member which are confronted with each other through the respective encoder; and a holding device for holding the other end of the rotary shafts; and an urging device for urging the other end of the rotary shafts to push the drivers against the ball.

Abstract: An object of this invention is to provide a track ball coordinate data inputting device in which means for holing supporting ball elements adapted to support the ball is simplified in structure, so that the supporting ball elements can be built in it with ease. In a track ball coordinate data inputting device, supporting ball element holding sections for holding supporting ball elements adapted to support a ball have inserting grooves which are each like a cut circle in section which is obtained by cutting a true circle equal in diameter to the supporting ball element with a chord shorter than the diameter. Each of the inserting grooves is engraved in the spherical inner wall surface of the accommodating section in such a manner that it is extended downwardly from the upper edge of the spherical inner wall surface and is wide enough to allow the passage of the supporting ball element.