Motor securing structures and disc drive

A motor-securing structure for securing an electric motor supported on a motor substrate to a chassis, said structure comprising:

• at least three coupling sections which couple the motor substrate and the chassis to each other;
• at least two of said coupling sections being fixed support members which hold and space the motor substrate and the chassis from each other at a prescribed distance and the remaining coupling section being an adjusting support member which holds the motor substrate and the chassis from each other at a variable distance,
• wherein the adjusting support member comprises a first adjustment screw for moving the motor substrate toward the chassis when driven and a second adjustment screw having a head interposed between the motor substrate and the chassis, the motor substrate or the chassis is clamped between the heads of the first and second adjustment screws when the first and second adjustment screws are turned;
• and
• the motor substrate has a reinforcing part which extends in a line connecting the two adjustment screws of the adjusting support member or in parallel to the line.

A disc drive apparatus comprising:

• a turntable for holding a disc-shaped recording medium;
• a spindle motor for rotating the turntable;
• an optical pickup for reading and writing data on and from the disc-shaped recording medium;
• guide shafts supporting the optical pickup, allowing the optical pickup to move in a radial direction of the disc-shaped recording medium;
• a thread motor for moving the optical pickup;
• a tangential-skew adjusting mechanism for adjusting a skew of an optical axis of the optical pickup, mainly with respect to a tangential direction of the recording tracks of the disc-shaped recording medium;
• and
• a radial-skew adjusting mechanism for adjusting a skew of the optical axis of the optical pickup, mainly with respect to a radial direction of the recording tracks of the disc-shaped recording medium.

A disc drive apparatus comprising:

• a turntable for holding a disc-shaped recording medium;
• a spindle motor for rotating the turntable;
• an optical pickup for reading and writing data on and from the disc-shaped recording medium;
• guide shafts supporting the optical pickup, allowing the optical pickup to move in a radial direction of the disc-shaped recording medium;
• a thread motor for moving the optical pickup;
• and
• a radial-skew adjusting mechanism for inclining the guide shafts to the chassis, thereby to adjust a skew of an optical axis of the optical pickup, mainly with respect to a radial direction of the recording tracks of the disc-shaped recording medium,
• wherein the radial-skew adjusting mechanism comprises at least three coupling sections which couple a motor substrate and the chassis to each other;
• at least two of said coupling sections are fixed support members which hold and space the motor substrate and the chassis from each other at a prescribed distance, the remaining coupling section is an adjusting support member which holds the motor substrate and the chassis from each other at a variable distance;
• the motor substrate has slits near the fixed support members, thus having fragile parts;
• the adjusting support member comprises a first adjustment screw for moving the motor substrate toward the chassis when driven and a second adjustment screw having a head interposed between the motor substrate and the chassis, the motor substrate or the chassis is clamped between the heads of the first and second adjustment screws when the first and second adjustment screws are turned;
• and
• the motor substrate has a reinforcing part which extends in a line connecting the two adjustment screws of the adjusting support member or in parallel to the line.