JPH02132375U - - Google Patents
Info
- Publication number
- JPH02132375U JPH02132375U JP3995289U JP3995289U JPH02132375U JP H02132375 U JPH02132375 U JP H02132375U JP 3995289 U JP3995289 U JP 3995289U JP 3995289 U JP3995289 U JP 3995289U JP H02132375 U JPH02132375 U JP H02132375U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic tape
- annular rib
- hub
- lower cassette
- cassette
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Description
第１図は本考案を適用した磁気テープカセツト
の斜視図、第２図及び第３図は第１図の磁気テー
プカセツトを射出成形するとき及び型抜きの工程
を示す概略断面図、第４図は第１図に示す磁気テ
ープカセツトのハブ穴近傍におけるＢ−Ｂ線にそ
つた部分の断面図、第５図及び第６図は従来のカ
セツトハーフの成形工程を示す断面図である。
図中の符号、１０……磁気テープカセツト、２
……ケースボデイ、３ａ……上カセツトハーフ、
３ｂ……下カセツトケース、５……磁気テープ、
１２……ハブ穴、２１……固定金型、２２……可
動金型、２３……突き出し具、２４……キヤビテ
イ、２５……ランナー、２６ａ，２６ｂ……環状
リブ、２７……段差部、２９……フリクシヨンシ
ート。
FIG. 1 is a perspective view of a magnetic tape cassette to which the present invention is applied, FIGS. 2 and 3 are schematic sectional views showing the steps of injection molding and die cutting of the magnetic tape cassette of FIG. 1, and FIG. 4 1 is a sectional view taken along line B--B in the vicinity of the hub hole of the magnetic tape cassette shown in FIG. 1, and FIGS. 5 and 6 are sectional views showing a conventional cassette half forming process. Code in the figure: 10...Magnetic tape cassette, 2
...Case body, 3a...Upper cassette half,
3b...lower cassette case, 5...magnetic tape,
12... Hub hole, 21... Fixed mold, 22... Movable mold, 23... Extruder, 24... Cavity, 25... Runner, 26a, 26b... Annular rib, 27... Step portion, 29... Frixion sheet.
Claims (1)
形成される中空内部に、磁気テープを巻回したハ
ブをハブ穴縁部の環状リブにて回転自在に位置規
制するように構成された磁気テープカセツトにお
いて、前記上下カセツトハーフの成形時に該カセ
ツトハーフを金型から離脱させる突き出し具によ
り、前記ハブと前記環状リブとの接触面を小さく
するように該環状リブの頂部に段差部を形成した
ことを特徴とする磁気テープカセツト。 In the magnetic tape cassette, the hub on which the magnetic tape is wound is rotatably regulated by an annular rib at the edge of the hub hole in a hollow interior formed by overlapping a pair of upper and lower cassette halves. A stepped portion is formed at the top of the annular rib so as to reduce the contact surface between the hub and the annular rib by means of an ejector that separates the upper and lower cassette halves from the mold when the upper and lower cassette halves are molded. Magnetic tape cassette.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3995289U JPH02132375U (en) | 1989-04-06 | 1989-04-06 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3995289U JPH02132375U (en) | 1989-04-06 | 1989-04-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02132375U true JPH02132375U (en) | 1990-11-02 |
Family
ID=31549314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3995289U Pending JPH02132375U (en) | 1989-04-06 | 1989-04-06 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02132375U (en) |
-
1989
- 1989-04-06 JP JP3995289U patent/JPH02132375U/ja active Pending