Patent ID: 7187516

Claim:
A magnetic recording and reproduction apparatus for recording information to, and/or reproducing information from, a magnetic tape accommodated in a cassette, the magnetic recording and reproduction apparatus comprising: a main chassis on which a rotatable head cylinder for recording information to, and/or reproducing information from, the magnetic tape is mounted; a sub chassis on which the cassette is mountable, the sub chassis being movable relative to the main chassis; and a first guide section for guiding the sub chassis to move relative to the main chassis; wherein: the first guide section includes: a first guide groove provided in one of the main chassis and the sub chassis, the first guide groove extending in a direction in which the sub chassis is movable relative to the main chassis; and a first projection provided on the other of the main chassis and the sub chassis, the first projection being engageable with the first guide groove and movable along the first guide groove; and the first guide groove has two opposing sidewalls and two ends between which the first projection is movable, the first projection is contactable with at least one of the two ends at two points on said opposing sidewalls oppsite to each other with respect to a line which is drawn by a center of gravity of the first projection by the movement of the first projection along the first guide groove and the at least one end is formed such that the movement of the first projection toward the at least one end is stopped by the contact with the two points, and the two points have a distance therebetween which is shorter than a width of the first guide groove in a direction perpendicular to the direction in which the sub chassis is movable.