JPH0250883U

JPH0250883U -

Info

Publication number: JPH0250883U
Application number: JP13021188U
Authority: JP
Priority date: 1988-10-04
Filing date: 1988-10-04
Publication date: 1990-04-10
Anticipated expiration: 2003-10-04
Also published as: JPH0544943Y2

Description

[Brief explanation of the drawing]

第１図は本考案の磁気テープカセツトにおける
ロツクプレートの斜視図、第２図ａ，ｂは上記ロ
ツクプレートの突起を示す斜視図および平面図、
第３図は上記ロツクプレートの断面図、第４図は
磁気テープカセツトの斜視図、第５図は上記磁気
テープカセツトの要部の分解斜視図、第６図は従
来のロツクプレートの斜視図、第７図は従来のロ
ツクプレートの突起の拡大斜視図、第８図は従来
のロツクプレートの断面図である。３……カセツトケース本体、６……ガードパネ
ル、１０……ロツクプレート、１１……プレート
本体、１２，１３……突部、１４……軸部、１５
……トーシヨンバネ、１５ａ……コイル部、１５
ｂ，１５ｃ……脚部、２６，２７……突起、２６
ａ，２７ａ……第１のテーパ面、２７ｂ……第２
のテーパ面、２８……溝部。 FIG. 1 is a perspective view of a lock plate in the magnetic tape cassette of the present invention, FIGS. 2a and 2b are a perspective view and a plan view showing protrusions of the lock plate,
FIG. 3 is a sectional view of the lock plate, FIG. 4 is a perspective view of the magnetic tape cassette, FIG. 5 is an exploded perspective view of the main parts of the magnetic tape cassette, and FIG. 6 is a perspective view of a conventional lock plate. FIG. 7 is an enlarged perspective view of a protrusion of a conventional lock plate, and FIG. 8 is a sectional view of the conventional lock plate. 3...Cassette case body, 6...Guard panel, 10...Lock plate, 11...Plate body, 12, 13...Protrusion, 14...Shaft part, 15
... Torsion spring, 15a ... Coil part, 15
b, 15c... Leg, 26, 27... Protrusion, 26
a, 27a...first tapered surface, 27b...second
Tapered surface, 28...groove portion.

Claims

[Claims for Utility Model Registration] The cassette case body is composed of a cassette case body which stores a magnetic tape, and a guard panel attached to the magnetic tape sliding surface of the cassette case body, and the cassette case body has a plate-shaped The plate body,
a protrusion implanted in the plate body and protruding in a direction substantially perpendicular to the plate body; a shaft part adjacent to the plate body and integrally formed with the plate body and extending substantially parallel to the plate body; A torsion spring comprising a coil part and two legs extending from the coil part in two directions, and the coil part is engaged with the shaft part by moving the coil part along the shaft part. A lock plate is attached, and the protrusion is caused to protrude out of the cassette case body and engage with the guard panel by the biasing force of the torsion spring, and the guard panel is positioned above the magnetic tape sliding surface. In the magnetic tape cassette to be fixed, two protrusions are provided on a surface of the plate body opposite to the surface on which the protrusion is formed, and are arranged in a direction in which the shaft extends, and the torsion spring is attached to the two legs. one of the legs is brought into contact with a wall formed within the cassette case body, and the other leg is brought into contact with the plate body between the two projections, and the other leg is brought into contact with the mutually opposing inner wall surfaces of the projections. , a first tapered surface that gradually narrows the interval between the two protrusions toward the plate main body is formed, and the shaft portion side of the protrusion is located on the upstream side in the direction of movement of the coil portion. A magnetic tape cassette characterized in that a second tapered surface is formed on the end portion of the protrusion so that the height of the protrusion gradually decreases toward the shaft portion.