Abstract: A tape cartridge of the type having a pocket for drawing out a recording tape from the cartridge for tape loading and a shutter slidably mounted on the bottom portion of the cartridge for opening and closing the bottom opening of the pocket, and a plurality of ribs extending in a frontward and backward direction on the inner face of the shutter so as to assure a smooth sliding movement of the shutter.

Abstract: In a tape cartridge of the type having a front lid for protection of the tape and the position thereof in a tape player is decided by a positioning member of the tape player, a reference face of the tape cartridge to which the positioning member of the tape player abuts is provided on the front end portion of the side wall of the cartridge so as to avoid interference with the front lid and the positioning member and to avoid the need for providing an opening in the front lid for passing the positioning member.

Abstract: In a tape cartridge comprising a case body having an opening for viewing the amount of roll of tape, at least one hub accommodated in the case body for winding a recording tape, a plate for closing the opening and a braking member for stopping rotation of the hub when not in use, the plate is composed of a support plate and a transparent window plate portion and is assembled in the case body defining a gap g between the support plate and the inner face of the top wall of the case body. The brake member is slidably inserted in the gap g with a part of the brake member engaging a part of the hub to stop rotation thereof.

Abstract: A method for fabricating a rear core for the magnetic circuit of a Hall effect magnetic head is disclosed. The bottom size of the rear core protrusion is made substantially equal to the size of a Hall element. A gap is provided between the Hall element and the rear core. In order to minimize the gap, the rear core block is provided with supports for fabrication, whereby the gap between the Hall element and the bottom protrusion of the rear core is positioned accurately. The supports are removed at the end of fabrication. The bottom protrusion of the rear core prevented pressure from being applied to the Hall element, thus improving the sensitivity of the Hall effect magnetic head without increasing noises.