Disk cartridge and method for constructing the same

A method for constructing a disk cartridge, comprising the steps of:

• placing a disk in either one of an upper half or a lower half, the upper half and the lower half composing a cartridge box having a center hole for receiving a motor for rotating the disk, a head slit for receiving a recording and playback head, and a window on its side wall;
• inserting a slider into a first guide groove provided on one side wall of the one of the halves;
• inserting an opener belt into a second guide groove which is provided over two side walls including the one side wall so as to cover a corner of the one of the halves;
• placing the one of the halves provided with the disk, the slider, and the opener belt on the other of the halves to form the cartridge box;
• inserting an elastic body inside the cartridge box through the window and fixing one end of the elastic body to the cartridge box and the other end thereof to the slider;
• engaging one end of the slider with one end of the opener belt under a condition that the elastic body is inside the cartridge box;
• and
• attaching a shutter for opening or closing at least the head slit to the slider.

A method for constructing a disk cartridge, comprising the steps of:

• placing a disk in either one of an upper half or a lower half, the upper half and the lower half composing a cartridge box having a center hole for receiving a motor for rotating the disk, a head slit for receiving a recording and playback head, and a window including an opening on its side wall;
• inserting a slider into a first guide groove provided on one side wall of the one of the halves;
• placing the one of the halves provided with the disk, and the slider on the other of the halves to form the cartridge box;
• inserting an elastic body inside the cartridge box through the window and fixing one end of the elastic body to the cartridge box and the other end thereof to the slider;
• inserting an opener belt through the opening into a second guide groove which is provided over two side walls including the one side wall so as to cover a corner of the one of the halves, under a condition that the elastic body is inside the cartridge box;
• engaging one end of the slider with one end of the opener belt;
• and
• attaching a shutter for opening or closing at least the head slit to the slider.

A disk cartridge rotatably accommodating a disk, comprising:

• a cartridge box composed of an upper half and a lower half, including a center hole for receiving a motor for rotating the disk, a head slit for receiving a recording and playback head, and a side wall having a window;
• a shutter movably provided on the cartridge box, the shutter including sheet portions for opening or closing at least the head slit, and connecting portions;
• a slide member covering the window, connected to the shutter through the connecting portions of the shutter and slidably guided inside the cartridge box so that the shutter moves in a direction for opening or closing the head slit;
• and
• an elastic body which is provided inside the cartridge box so as to pass through the window, one end of the elastic body being fixed to the cartridge box and the other end thereof being fixed to the slide member, the elastic body pushing the shutter in a direction for closing the head slit,
• wherein the slide member comprises a slider positioned at the side wall having the window, and an opener belt movably guided along a guide groove provided over two side walls including the side wall having the window so as to cover a corner of the cartridge box, one end of the opener belt including engagement means for engaging the opener belt with the slider to cover the window and the elastic body subsequent to the elastic body being provided inside the cartridge box via the window.