JPS58137173A - Tape cassette case - Google Patents

Tape cassette case

Info

Publication number
JPS58137173A
JPS58137173A JP1826082A JP1826082A JPS58137173A JP S58137173 A JPS58137173 A JP S58137173A JP 1826082 A JP1826082 A JP 1826082A JP 1826082 A JP1826082 A JP 1826082A JP S58137173 A JPS58137173 A JP S58137173A
Authority
JP
Japan
Prior art keywords
tape
case
cassette case
abs
composite material
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
Application number
JP1826082A
Other languages
Japanese (ja)
Inventor
Shuichi Sato
修一 佐藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
I Pex Inc
Original Assignee
Dai Ichi Seiko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dai Ichi Seiko Co Ltd filed Critical Dai Ichi Seiko Co Ltd
Priority to JP1826082A priority Critical patent/JPS58137173A/en
Publication of JPS58137173A publication Critical patent/JPS58137173A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/02Containers; Storing means both adapted to cooperate with the recording or reproducing means
    • G11B23/04Magazines; Cassettes for webs or filaments
    • G11B23/08Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends
    • G11B23/087Magazines; Cassettes for webs or filaments for housing webs or filaments having two distinct ends using two different reels or cores

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)

Abstract

PURPOSE:To eliminate the frictional electricity and to obtain stable recording/ reproducing performance, by producing a tape cassette case with a material obtained by compounding metallic powder or metallic oxide of Zn, etc., a lubricant and reinforcing fibers with a specific range of each quantity to the thermoplastic resin such as ABS. CONSTITUTION:A composite material is obtained by mixing 150-500pts.wt. metallic powder or metallic oxide of Zn, Al, Fe, etc. with 100pts.wt. thermoplastic resin such as ABS, polyamide or acetal resin with addition of 1pts.wt. lubricant (calcium stearate, etc.) and 1-50pts.wt. aromatic polyamide fibers (reinforcing material). A cassette case 1 is produced with such a composite material. This case 1 has a small heat contraction factor, excellent restoring performance, virtually no change due to the temperature of tape guides 1a, no deformation after molding, smooth travelling of tape and no frictional electricity. This eliminates the attraction of dust as well as dropout to ensure stable recording/reproducing of a cassette tape.

Description

【発明の詳細な説明】 本発明は、テープカセットのケースに関し、熱変化によ
る安定性を良くして変形を少なくシ、高密度にして成形
時の過充填による残留応力による変形を少なくシ、潤滑
性を改善してテープ走行を円滑にし、導電率を高くして
帯電による悪影響を防止するようにしたものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette case that has improved stability due to thermal changes to reduce deformation, high density to reduce deformation due to residual stress due to overfilling during molding, and lubrication. This improves the properties of the tape to make it run smoothly, and increases the electrical conductivity to prevent the negative effects of charging.

従来、図面に示した如く、内部にテープガイド1aとガ
イドローラー2を枢支するだめの支軸1bとが一体形成
されていて該テープガイド1aと該ガイドローラー2と
により磁気テープ3を案内するようにしたカセットケー
ス1は、一般にABS樹脂等の合成樹脂のみをもって成
形されているのが一般的である。ところが、このような
材料で形成されるケース1は、その構成材料の性質上熱
収縮率が大きく且つ熱膨張に対する復元性が悪いために
、温度変化によってテープガイド1a及び支軸1b等の
テープガイド構成部の垂直度が変化し、その結果テープ
2の位置が変化するため温度変化により録音再生特性が
変化するという問題があった。父、ケース1は、その構
成材料の性質上成形後過充填による残留応力により変形
するので、内側に変形することによりケース1内のテー
プ3の走行が妨げられたり、特にテープガイドla及び
支軸1b等のテープガイド構成部においては成形後ヒケ
により垂直度が変化し、その結果テープ30走行が片寄
るためテープ3の正規の位置での録音が不可能となり、
録音再生特性が著しく劣化するという問題があった。又
、ケース1は、その構成材料の性質上内部をテープ3が
走行することにより摩擦帯電が生じ、その結果テープ3
に埃が付着してドロップアウトの原因となるため、良好
な録音再生が期待出来なかった。
Conventionally, as shown in the drawings, a tape guide 1a and a support shaft 1b for pivotally supporting a guide roller 2 are integrally formed inside, and the magnetic tape 3 is guided by the tape guide 1a and the guide roller 2. The cassette case 1 is generally molded only from synthetic resin such as ABS resin. However, the case 1 made of such a material has a high thermal contraction rate due to the nature of its constituent materials and has poor resilience against thermal expansion, so the tape guides such as the tape guide 1a and the support shaft 1b may be damaged due to temperature changes. There is a problem in that the perpendicularity of the components changes, and as a result, the position of the tape 2 changes, resulting in changes in recording and playback characteristics due to temperature changes. Due to the nature of its constituent materials, the case 1 deforms due to residual stress caused by overfilling after molding, so the inward deformation may impede the running of the tape 3 inside the case 1, especially the tape guide la and the support shaft. In the tape guide components such as 1b, the perpendicularity changes due to sink marks after molding, and as a result, the tape 30 runs unevenly, making it impossible to record at the normal position of the tape 3.
There was a problem in that the recording and playback characteristics deteriorated significantly. In addition, due to the nature of the constituent material of the case 1, frictional charging occurs when the tape 3 runs inside, and as a result, the tape 3
Good recording and playback could not be expected because dust would adhere to the disc and cause dropouts.

本発明は、上記問題点に鑑み、熱変化による安定性を良
くして変形を少なくシ、高密度にして成形時の過充填に
よる残留応力による変形を少なくし、潤滑性を改善して
テープ走行を円滑にし、導電率を高くして帯電による悪
影響を防止するようにしたケースを提供せんとするもの
である。即ち、本発明によるケースは、ABS樹脂、ポ
リアミド。
In view of the above problems, the present invention improves stability due to thermal changes to reduce deformation, increases density to reduce deformation due to residual stress due to overfilling during molding, and improves lubricity to allow tape running. It is an object of the present invention to provide a case that has smooth conductivity and high conductivity to prevent adverse effects caused by charging. That is, the case according to the present invention is made of ABS resin or polyamide.

アセタール系樹脂等の熱可塑性樹脂100重量部に対し
亜鉛、アルミニウム、鉄等の金属粉或はその酸化物を1
50〜500重量部混入し、更に潤滑性を増すための添
加剤として例えばステアリン酸カルシウム1重社部及び
補強材として例えば芳香族ポリアミド繊維1〜50重置
部を加えた複合材料により形成して成るものである。
1 part by weight of metal powder such as zinc, aluminum, iron, or its oxide per 100 parts by weight of thermoplastic resin such as acetal resin.
It is formed from a composite material in which 50 to 500 parts by weight are mixed, and an additive for increasing lubricity, such as one layer of calcium stearate, and a reinforcing material, for example, 1 to 50 parts of aromatic polyamide fiber are added. It is something.

本発明によるケースは上述の如く構成されており、合成
樹脂に混入される亜鉛、アルミニウム。
The case according to the present invention is constructed as described above, and contains zinc and aluminum mixed in the synthetic resin.

鉄等の金属粉或はその酸化物は熱収縮率が小さく且つ熱
膨張に対する復元性が良いから、テープガイド構成部の
垂直度が温度変化によって変化することは#1とんどな
く、録音再生特性が温度変化に対して安定する。父、上
記金属粉或はその酸化物は高密度であって成形時の過充
填による残留応力による変形がないから、本発明による
ケースは成形後内側に変形することがなく、而も潤滑剤
も含んでいることからテープ走行は円滑となる。父、同
じ理由によりテープガイド構成部の垂直度が変化しない
から、テープは常に正規の位置に保持され、その結果良
好な録音再生が可能となる。父、本発明によるケースは
、合成樹脂に金属或は金属酸化物を混入することにより
導電率を高くしているので、テープ走行による摩擦帯電
はなくテープに埃が付着しない。従って、ドロップアウ
トの原因がなくなるので、良好な録音再生が可能となる
Metal powder such as iron or its oxide has a low thermal contraction rate and good resilience against thermal expansion, so the perpendicularity of the tape guide component rarely changes due to temperature changes, making recording and playback possible. Characteristics are stable against temperature changes. Since the metal powder or its oxide has a high density and is not deformed by residual stress due to overfilling during molding, the case according to the present invention does not deform inward after molding, and also does not require lubricant. Since it contains the tape, the tape runs smoothly. For the same reason, the verticality of the tape guide component does not change, so the tape is always held in the correct position, resulting in good recording and playback. Since the case according to the present invention has high electrical conductivity by mixing metal or metal oxide into the synthetic resin, there is no frictional electrification caused by the running of the tape, and no dust adheres to the tape. Therefore, since the cause of dropout is eliminated, good recording and playback is possible.

尚、合成樹脂に金属粉等を多量に混入すると強度が低下
するが、本発明によるケースの場合は補強材として炭素
繊維等を加えることによシ解決している。父、合成樹脂
に金属粉等を多量に混入すると潤滑性も低下するが、本
発明によるケースの場合は、ステアリン酸等の添加剤を
加えることにより潤滑性を増している。以上の二点の改
良によシ、本発明によるケースは、金属粉混入前の樹脂
の特性を維持している。
Incidentally, if a large amount of metal powder or the like is mixed into the synthetic resin, the strength will decrease, but this problem is solved in the case of the present invention by adding carbon fiber or the like as a reinforcing material. However, if a large amount of metal powder or the like is mixed into a synthetic resin, the lubricity will be reduced, but in the case of the present invention, the lubricity is increased by adding an additive such as stearic acid. In addition to the above two improvements, the case according to the present invention maintains the characteristics of the resin before mixing the metal powder.

上述の如く、本発明によるテープカセットのケースによ
れば、録音再生特性が温度変化に対して安定し、テープ
走行が円滑となり、テープが常に正規の位置に保持され
、テープ走行による摩擦帯電がなくなるので、良好な録
音再生が可能になるという実際上重要な利点を有してい
る。
As described above, according to the tape cassette case of the present invention, the recording and playback characteristics are stable against temperature changes, the tape runs smoothly, the tape is always held in the correct position, and frictional charging due to tape running is eliminated. Therefore, it has an important practical advantage of being able to perform good recording and playback.

【図面の簡単な説明】[Brief explanation of the drawing]

図面はテープカセットのケース及びその内部構造を示す
斜視図である。 1・・・・カセットケース、1a・・・・テープガイド
、1b・・・・支軸、2・・・・ガイドローラー、3・
・・・磁気テープ。 し
The drawing is a perspective view showing the case of the tape cassette and its internal structure. 1...Cassette case, 1a...Tape guide, 1b...Spindle, 2...Guide roller, 3...
···Magnetic tape. death

Claims (1)

【特許請求の範囲】[Claims] ABS樹脂、ポリアミド、アセタール系樹脂等の熱可塑
性樹脂100重量部に対し亜鉛、アルミニウム、鉄等の
金属粉或はその酸化物を150〜500重量部混入し、
更に潤滑性を増すための添加剤として例えばステアリン
酸カルシウム1重量部及び補強材として例えば芳香族ポ
リアミド繊維1〜50重量部を加えた複合材料により形
成して成るテープカセットのケース。
150 to 500 parts by weight of metal powder such as zinc, aluminum, iron, or its oxide is mixed into 100 parts by weight of a thermoplastic resin such as ABS resin, polyamide, or acetal resin,
A tape cassette case made of a composite material to which additives for increasing lubricity, such as 1 part by weight of calcium stearate, and reinforcing materials, such as 1 to 50 parts by weight of aromatic polyamide fibers, are added.
JP1826082A 1982-02-09 1982-02-09 Tape cassette case Pending JPS58137173A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1826082A JPS58137173A (en) 1982-02-09 1982-02-09 Tape cassette case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1826082A JPS58137173A (en) 1982-02-09 1982-02-09 Tape cassette case

Publications (1)

Publication Number Publication Date
JPS58137173A true JPS58137173A (en) 1983-08-15

Family

ID=11966702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1826082A Pending JPS58137173A (en) 1982-02-09 1982-02-09 Tape cassette case

Country Status (1)

Country Link
JP (1) JPS58137173A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538938A1 (en) * 1982-12-29 1984-07-06 Sony Corp MAGNETIC STRIP CASSETTE IN WHICH THE ELEMENTS CONTAIN CERAMIC OR SYNTHETIC MATERIALS OR A MIXTURE OF BOTH
JPS60124077A (en) * 1983-12-08 1985-07-02 Yoshiro Nakamatsu Package for recording and reproducing medium
JPS6187286A (en) * 1984-10-05 1986-05-02 Sony Corp Tape cassette and cassette mechanism parts
EP0223538A2 (en) * 1985-11-13 1987-05-27 Minnesota Mining And Manufacturing Company Plastic supply tape guide for videocassette
EP0528300A2 (en) * 1991-08-16 1993-02-24 BASF Magnetics GmbH Cassette with record carrier, particularly magnetic tape cassette

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5133539U (en) * 1974-09-03 1976-03-12
JPS56127984A (en) * 1980-03-10 1981-10-07 Sony Corp Hub piece of tape cassette

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5133539U (en) * 1974-09-03 1976-03-12
JPS56127984A (en) * 1980-03-10 1981-10-07 Sony Corp Hub piece of tape cassette

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538938A1 (en) * 1982-12-29 1984-07-06 Sony Corp MAGNETIC STRIP CASSETTE IN WHICH THE ELEMENTS CONTAIN CERAMIC OR SYNTHETIC MATERIALS OR A MIXTURE OF BOTH
JPS60124077A (en) * 1983-12-08 1985-07-02 Yoshiro Nakamatsu Package for recording and reproducing medium
JPS6187286A (en) * 1984-10-05 1986-05-02 Sony Corp Tape cassette and cassette mechanism parts
EP0223538A2 (en) * 1985-11-13 1987-05-27 Minnesota Mining And Manufacturing Company Plastic supply tape guide for videocassette
EP0528300A2 (en) * 1991-08-16 1993-02-24 BASF Magnetics GmbH Cassette with record carrier, particularly magnetic tape cassette

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