JPH0337682U - - Google Patents

Description

[Brief explanation of drawings]

Figures 1a, b, and c are views showing one embodiment of the magnetic disk cartridge of the present invention, and Figure 1a is an expanded view showing the peripheral wall of each case member that houses the accidental erasure prevention piece, and Figure b is a longitudinal cross-sectional view showing the peripheral wall in Figure 1, Figure c is a transverse cross-sectional view at a protrusion showing the peripheral wall in Figure 1, and Figures 2 a to e are views showing a conventional magnetic disk cartridge. Figure a is a developed view showing the inner surfaces of a pair of case members, Figure b is an enlarged view of the peripheral wall of each case member housing the accidental erasure prevention piece in Figure A, and Figure C is a developed view showing the inner surfaces of the pair of case members. Figure b is a perspective view showing the mistaken erasure prevention piece stored, Figure d is a cross-sectional view showing the accidental erasure prevention piece stored and locked on the peripheral wall, and Figure e is a perspective view showing the accidental erasure prevention piece stored in the peripheral wall. FIG. 7 is a cross-sectional view of the curved surface forming portion showing a state in which the protrusion is located on the curved surface, accommodated and assembled. 1... Case, 2... Case member, 4... Erroneous erasure prevention piece, 4A... Body part, 4B... Arm part,
4C... Protrusion, 22... Peripheral wall, 22A... Peripheral wall, 22B... Locking protrusion, 22C... Curved portion, 22D... Pocket portion, 22E... Protrusion, 2
2F...Notch.

Claims (1)

[Claims for Utility Model Registration] An erroneous erasure prevention piece that prevents erroneous erasure of recorded information on a magnetic disk housed in a case formed by combining a pair of case members, and a slidable storage of the erroneous erasure prevention piece. and a peripheral wall defined on the inner surface of each corner of the pair of case members, and the accidental erasure prevention piece has a pair of arm parts extending from both sides of the body part, and a peripheral wall defined on the inner surface of the corner of each of the pair of case members. A protrusion protruding outward is formed at the tip of the arm part, and the peripheral wall formed on one of the case members is formed on each of the opposing peripheral wall parts along the sliding direction of the accidental erasure prevention piece. Two pairs of locking protrusions that lock the ends of the pair of protrusions of the accidental erasure prevention piece are formed on the inside, and two pairs of locking protrusions formed on the same peripheral wall are formed on the inside. A curved surface that curves in the opposite direction to the protruding direction is formed between them, and a pocket portion is formed by a pair of these curved surfaces, and when the accidental erasure prevention piece is slid, the accidental erasure prevention piece In the magnetic disk cartridge, the pair of protrusions of the one case member engage with the two pairs of locking protrusions, respectively, and the accidental erasure prevention piece is locked. A protrusion is provided in at least a portion of the peripheral wall where the curved surface is formed, so that the height of the wall surface of the portion is equal to or higher than the wall thickness of the protrusion of the accidental erasure prevention piece, and the peripheral wall A magnetic disk cartridge characterized in that a notch portion for accommodating the protruding portion is provided in a peripheral wall portion of the other case member corresponding to the portion.