Patent ID: 6056224
Filing Date: 2000-05-02
Classification: G11B

Abstract:
A magnetic tape cassette comprising:a casing body which contains a magnetic tape and is provided in a bottom thereof with an opening through which a tape loading mechanism of at least one of a recording and reproducing system is inserted into the casing body, anda slider provided opposed to a lower surface of the bottom of the casing body to be slidable back and forth in a direction of loading of the magnetic tape cassette into the recording and reproducing system between a closing position where it closes the opening and an opening position where it opens the opening,said casing body including a resilient locking piece having an engagement head which is rotatable up and down on the bottom of the casing body, andsaid slider including:a pair of through holes which are brought into engagement with the engagement head of the resilient locking piece respectively in the closing position and the opening position of the slider, to lock the slider,a guide channel substantially rectangular in cross-section being formed on a side of the slider remote from the casing body to extend in the direction of loading of the cassette and adapted to guide a lock release member of the recording and reproducing system to abut against the engagement head of the locking piece to disengage the engagement head of the locking piece from one of the pair of through holes, andan elevated area formed on a surface of the slider facing the casing body and in sliding contact with a lower surface of the bottom of the casing body, the elevated area being formed so as to surround an area corresponding to the guide channel and extending from one end of the slider near the opening of the casing body no more than halfway toward the other end of the slider, said elevated area having an arcuate portion.