JPH02123781U

JPH02123781U -

Info

Publication number: JPH02123781U
Application number: JP3235889U
Authority: JP
Priority date: 1989-03-22
Filing date: 1989-03-22
Publication date: 1990-10-11

Description

[Brief explanation of drawings]

第１図は本考案を適用したオーデイオテープカ
セツト用上ハーフの窓部付近の構造を示す縦断面
図であり、第３図における上ハーフの−線断
面図に相当する。第２図ａ，ｂは同上ハーフの製
造過程を示すコアバツク方式による金型装置の縦
断面図である。第３図は同上ハーフを示す平面図
である。第４図は同上ハーフを用いて組み立てた
オーデイオテープカセツトの斜視図である。第５
図は従来のオーデイオテープカセツト用上ハーフ
の窓部付近の構造を示す縦断面図、第６図ａ，ｂ
は同上ハーフの製造過程を示すコアバツク方式に
よる金型装置の縦断面図である。第７図は従来の
他のオーデイオテープカセツト用上ハーフの窓部
付近の構造を示す縦断面図、第８図ａ，ｂは同上
ハーフの製造過程を示すコアバツク方式による金
型装置の縦断面図である。３０，７８……上下ハーフ、３２……上ハーフ
の窓部、３４……上ハーフの本体、３６，３８…
…窓部、本体の各外面、４０……平面、４２……
接着面、４４，４８……内面、４６……中央面、
５２……固定金型、５４……可動金型、５６……
摺動金型、６０……可動金型本体、６４……先端
部、６６……突出部、６８……接触面、８０……
ケース、８２，８４……ハブ、８６……テープ。 FIG. 1 is a longitudinal cross-sectional view showing the structure of the upper half of an audio tape cassette near the window to which the present invention is applied, and corresponds to the cross-sectional view taken along the line -- of the upper half in FIG. FIGS. 2a and 2b are longitudinal cross-sectional views of a molding device using the core back method, showing the manufacturing process of the same half. FIG. 3 is a plan view showing the same half. FIG. 4 is a perspective view of an audio tape cassette assembled using the same half. Fifth
The figure is a vertical cross-sectional view showing the structure near the window of the upper half of a conventional audio tape cassette.
FIG. 2 is a longitudinal cross-sectional view of a molding device using the core back method, showing the manufacturing process of the same half. Fig. 7 is a longitudinal cross-sectional view showing the structure of the window portion of another conventional upper half for audio tape cassettes, and Fig. 8 a and b are longitudinal cross-sectional views of a molding device using the core-back method showing the manufacturing process of the same half. It is. 30, 78... Upper and lower halves, 32... Window portion of upper half, 34... Main body of upper half, 36, 38...
...window, each outer surface of the main body, 40...plane, 42...
Adhesive surface, 44, 48...Inner surface, 46...Central surface,
52...Fixed mold, 54...Movable mold, 56...
Sliding mold, 60...Movable mold body, 64...Tip, 66...Protrusion, 68...Contact surface, 80...
Case, 82, 84...hub, 86...tape.

Claims

[Scope of Claim for Utility Model Registration] (1) A half with a transparent or translucent window integrally molded into the main body through which the amount of tape winding can be seen is used in at least one of the upper and lower halves, and the upper and lower halves are combined in a case. In a tape cassette that stores a tape wound around a hub, the outer surface of the window portion and the outer surface of the main body located near the window portion are at least coincident with each other and are formed on the same continuous plane. A tape cassette characterized in that the adhesive surface to the main body is composed of a plurality of faces in different directions, and the center of the inner surface of the window portion is set back one step from the inner surface of the main body. (2) A fixed mold that molds the half transparent or translucent window and the outer surface of the main body, and a movable mold that molds the inner surface of the half transparent or translucent window, and the movable mold has a sliding mold that integrally molds the window into the main body. In a core-back type half-forming mold device comprising a mold, the window portion of the fixed mold and the surface of the main body to be molded near the window portion are formed to be at least flat, and the center of the tip of the sliding mold is formed into a flat surface. A half-forming mold device characterized in that the protruding portion has an end surface that is a contact surface with a fixed mold.