Recording medium clamping apparatus

A recording medium clamping apparatus, comprising:

• a spindle, rotatable to rotate a disc-shaped recording medium thereon;
• a clamping member cooperatable with said spindle to clamp the recording medium at a center portion;
• a clamp operating member having a first end and a second end opposite said first end, rotatably supporting said clamping member at said first end, said clamp operating member being bendable at a bending portion of said clamp operating member spaced from and located between said first and second ends, in a direction toward said spindle;
• a supporting member pivotably supporting said clamp operating member at said second end, for pivotal movement between a first position of said clamp operating member in which said clamping member clamps the recording member and a second position of said clamp operating member in which said clamping member is released from clamping of the recording member;
• said clamp operating member, when between said first and second positions, being pivotable at said supporting member so as to pivot both said bending portion and first end together about said supporting member either toward or away from said spindle;
• a restraining member disposed so as to engage a portion of said clamp operating member and bend said clamp operating member at said bending portion toward said spindle, when said clamp operating member is in said second position;
• and
• means, including a pressing member engageable with said operating member at a pressing portion in the vicinity of said first end, for pressing said clamp operating member toward said spindle in said vicinity of said first end, so as to clamp said recording medium to said spindle with said clamping member, when said clamp operating member is moved from said second position to said first position.

A recording medium clamping apparatus comprising:

• a base;
• a driving member means, having a rotary shaft, for rotating a disc-shaped recording medium thereon;
• a pushing member having means for releasably pushing the recording medium against said rotary shaft;
• and
• a supporting means for supporting said pushing member and moving said pushing member between respective portions engaging and remote from the recording medium, said supporting means having
• a first supporting member having a first end and a second end opposite said first end, rotatably supporting said pushing member at a said first end, and
• a second supporting member pivotably supported on said base and pivotably supporting and carrying said first supporting member at a connection therebetween at said second end;
• and
• a control member having means for preventing relative pivotal movement between said first and second supporting members in a direction away from which said pushing member pushes the recording medium against said rotary shaft, when said pushing member pushes the recording medium against said rotary shaft, and for making said first supporting member pivotable at said connection when said pushing member is remote from said rotary shaft.

A recording medium clamping apparatus comprising:

• a base;
• a spindle, rotatable to rotate a recording medium thereon;
• a clamping member having means for clamping said recording medium to said spindle;
• a clamp operating member having first and second members pivotally joined to each other, said first member having a free end and supporting said clamping member at said free end, said second member being pivotally supported on said base;
• a control mechanism having means for moving said clamp operating member between a first position and a second position, said clamping member being pressed against said spindle to clamp said recording medium to said spindle when said clamp operating member is in said first position, said clamping member being separated from said spindle when said clamp operating member is in said second position;
• and
• a restricting member having means for restricting the pivoting direction of said first member, said restricting means comprising means for preventing said first member from pivoting relative to said second member toward a position adopted by said first member when said clamp operating member is positioned at said second position, when said clamp operating member is positioned at said first position by said control mechanism, said restricting means permitting said first member to pivot relative to said second member toward a position adopted by said first member when said clamp operating member is positioned at said first position, when said clamp operating member is positioned at said second position by said control mechanism.