JPH01303683A - Manufacture of tape guide and tape cassette using the tape guide - Google Patents
Manufacture of tape guide and tape cassette using the tape guideInfo
- Publication number
- JPH01303683A JPH01303683A JP63133343A JP13334388A JPH01303683A JP H01303683 A JPH01303683 A JP H01303683A JP 63133343 A JP63133343 A JP 63133343A JP 13334388 A JP13334388 A JP 13334388A JP H01303683 A JPH01303683 A JP H01303683A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- tape guide
- guide
- protrusions
- tool
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 238000005520 cutting process Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 10
- 238000005498 polishing Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 7
- 238000003825 pressing Methods 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 description 9
- 229910001220 stainless steel Inorganic materials 0.000 description 8
- 239000010935 stainless steel Substances 0.000 description 8
- 238000007747 plating Methods 0.000 description 7
- 239000011347 resin Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910001369 Brass Inorganic materials 0.000 description 2
- 229930182556 Polyacetal Natural products 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- -1 shapes Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は磁気テープを上下一対のハーフ内に収納すると
ともに前記上下一対のノ・−7内に前記テープの位置も
しくは走行経路を保持もしくは案内するべく固定される
テープガイドの製造方法、およびテープガイドを備えた
テープカセットに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to storing a magnetic tape in a pair of upper and lower halves and holding or guiding the position or running path of the tape in the pair of upper and lower halves. The present invention relates to a method of manufacturing a fixed tape guide and a tape cassette equipped with the tape guide.
従来の技術
従来、この種のテープカセットとしては、その代表的な
ものの一例としてVH3方式のビデオカセットが挙げら
れる。第6図に従来のテープカセットを示す。第6図に
おいて、ハーフ1の内部には一対のリール2.2に渡っ
て磁気テープ(以下、単にテープと称する)3が巻装さ
れていて、前記テープ3の位置もしくは経路は一対の円
筒状のテープガイド4.4及びガイドボール6、ガイド
ローラeによって保持もしくは案内されている。2. Description of the Related Art Conventionally, as a typical tape cassette of this type, a video cassette of the VH3 system can be mentioned. FIG. 6 shows a conventional tape cassette. In FIG. 6, a magnetic tape (hereinafter simply referred to as tape) 3 is wound around a pair of reels 2 and 2 inside the half 1, and the position or path of the tape 3 is arranged in a pair of cylindrical shapes. It is held or guided by a tape guide 4.4, a guide ball 6, and a guide roller e.
ここで、テープガイド4には第6図に示すように金属の
継目なしのパイプであってSUS 316等のステンレ
ス材の表面をローラバニッシュ加工もしくは超仕上げ加
工で仕上げたもの、もしくは黄銅あるいはアルミニウム
の基体に硬質クロームめっきを施してそのめっき層を研
削加工で仕上げたもの、また第7図に示すように金属板
を丸めて円筒形状にしたものであってステンレスあるい
は黄銅の基体に硬質クロームめっきを施してそのめっき
層を研削加工で仕上げたもの等が使用されている。As shown in Figure 6, the tape guide 4 is a seamless metal pipe whose surface is made of stainless steel such as SUS 316 with roller burnishing or super finishing, or made of brass or aluminum. The base is hard chromium plated and the plating layer is finished by grinding, and the metal plate is rolled into a cylindrical shape as shown in Figure 7, and the hard chrome plating is applied to the stainless steel or brass base. The plated layer is then polished and finished by grinding.
さらに、テープガイド4はポリアセタールを射出成形し
て作ったと思われる樹脂製のもの、及びステンレスの板
金を丸めて円筒にしてバレル研摩加工を施したと思われ
るものが使用されている。Further, the tape guide 4 is made of resin, which is thought to be made by injection molding polyacetal, and what is thought to be made of a stainless steel sheet metal rolled into a cylinder and subjected to barrel polishing.
テープガイド4は、また、第8図に示すように金属又は
樹脂の基体の表面に多数の微小た凹所4aを点在させた
もの、また樹脂の基体の表面に第9図Aに示すように周
方向の突条4bを形成したもの、第9図Bに示すように
突起4Cを点在させたもの、第9図Cに示すように周方
向に断面円弧状の突条4dを設けたもの、第9図りに示
すように周方向の溝4eを設けたもの、第9図Eに示す
ように軸方向の突起4fを周方向に多数設けたもの等が
採用されている。The tape guide 4 also has a metal or resin base with many minute recesses 4a dotted on the surface as shown in FIG. One in which protrusions 4b are formed in the circumferential direction, one in which protrusions 4C are dotted as shown in FIG. As shown in Figure 9, a groove 4e is provided in the circumferential direction, and as shown in Figure 9E, a number of protrusions 4f in the axial direction are provided in the circumferential direction.
発明が解決しようとする課題
しかしながら、このような従来の構成では、まず金属製
のテープガイドの場合は硬質クロームめっきを施してそ
のめっき層を研削加工したものが多種のテープに対する
摩擦特性や摩耗特性の性能面で最も優秀であるが、めっ
き等の加工コストが高いという欠点があυ、特に金属の
パイプを切断して製作する場合には材料コストが最も高
くなる。Problems to be Solved by the Invention However, with such a conventional configuration, first, in the case of metal tape guides, hard chrome plating is applied and the plating layer is ground, which has poor friction and wear characteristics against various types of tapes. Although it has the best performance, it has the disadvantage of high processing costs such as plating, and especially when manufacturing by cutting metal pipes, the material cost is the highest.
またステンレス材の表面をローラバニッシュ加工あるい
は超仕上げ加工で仕上げたものはめっきと研削を施すも
のほどは高いコストがかからないが、加工条件の変動が
テープとの摩擦摩耗特性に与える影響が大きく、さらに
特定の種類のテープに対しては摩擦摩耗特性が劣るとい
った欠点を有している。In addition, stainless steel surfaces finished with roller burnishing or super finishing do not cost as much as plating and grinding, but variations in processing conditions have a large effect on the friction and wear characteristics with the tape. It has the disadvantage of poor friction and wear properties for certain types of tape.
さらにステンレスの基材の表面を研削加工せずにバレル
加工だけ施したものは、前記のローラバニッシュ加工あ
るいは超仕上げ加工を施したものの欠点が更に顕著に現
われる。Furthermore, when the surface of a stainless steel base material is subjected to only barrel processing without grinding, the drawbacks of those subjected to roller burnishing or superfinishing are even more pronounced.
次に樹脂を基体としたテープガイドの場合は、特にポリ
アセタールのような一般的な樹脂を用いて射出成形で製
作する場合には金属製のものに比べてコスト的に著しく
有利となるが、前述のような様々な表面形状の工夫を加
えても、材料の有する摩擦摩耗特性が金属、特に硬質ク
ロームめっきやステンレス材と大きく異なるため、金属
製のものと同等の性能を有するテープガイドが得られて
いないのが実情である。Next, tape guides based on resin have a significant cost advantage compared to metal ones, especially when manufactured by injection molding using a common resin such as polyacetal. Even if various surface shape improvements are made, it is not possible to obtain a tape guide with performance equivalent to that of metal because the friction and wear characteristics of the material are significantly different from those of metal, especially hard chrome plating and stainless steel. The reality is that it is not.
本発明はこれらの課題を解決するもので、めっきと研削
加工を施したものに匹敵する高性能のテープガイドの製
造方法、および同テープガイドを備えるテープカセット
を提供することを目的とするものである。The present invention solves these problems, and aims to provide a method for manufacturing a tape guide with high performance comparable to that of a tape guide that is plated and ground, and a tape cassette equipped with the same tape guide. be.
課題を解決す、るための手段
これらの課題を解決するために本発明のテープガイドの
製造方法は、非磁性のステンレス材の板金を丸めて少な
くともテープと摺接する範囲の円筒面を有する部分的も
しくは完全な円筒を作成し、前記円筒部の少なくともテ
ープと摺接する部分に工具に設けた複数の刃先を強制的
に押しつけることによって塑性変形させ、前記円筒部外
周面にテープの走行方向に延びる実質的に平行な多数の
溝を形成すると共にそれらの溝の図に断面形状が略円弧
状である多数の突条を形成することを特徴とするもので
ある。Means for Solving the Problems In order to solve these problems, the method for manufacturing a tape guide of the present invention involves rolling a non-magnetic stainless steel sheet metal and forming a part of the tape guide having at least a cylindrical surface in a range that comes into sliding contact with the tape. Alternatively, a complete cylinder is created, and a plurality of cutting edges provided on a tool are forcibly pressed against at least the portion of the cylindrical portion that makes sliding contact with the tape, thereby plastically deforming the cylindrical portion to form a substance extending in the running direction of the tape on the outer peripheral surface of the cylindrical portion. It is characterized by forming a large number of parallel grooves, and forming a large number of protrusions having a substantially arcuate cross-section in the drawing of the grooves.
発明者はVHSテープカセットの構成部材の中で比較的
高価であるテープガイドのコスト低減を図るために前述
のような様々の材質・形状・仕上げ方法のテープガイド
を市販のカセットや部品メーカからのサンプル品や自ら
の試作といった形で手に入れてベースフィルムや磁性塗
膜が異なる種々のテープとの摩擦テストを行なった結果
、現時点では金属製のものに匹敵する樹脂製のテープガ
イドが得難いという結論に達し、樹脂製のものに匹敵す
る低コストの金属製テープガイドとしてステンレスの板
金を生産性が高くて加工コストの低いプレス加工及びバ
レル研摩加工を主体とする加工方法で製作することを試
みた。In order to reduce the cost of tape guides, which are relatively expensive among the components of VHS tape cassettes, the inventor has developed tape guides made of various materials, shapes, and finishing methods as described above from commercially available cassette and component manufacturers. As a result of friction tests with various tapes obtained in the form of sample products and own prototypes with different base films and magnetic coatings, it was found that at present it is difficult to obtain a tape guide made of resin that is comparable to a tape guide made of metal. We reached a conclusion and attempted to manufacture a stainless steel sheet metal tape guide at a low cost comparable to resin ones using a processing method mainly based on press processing and barrel polishing, which have high productivity and low processing costs. Ta.
しかしながらそのようなテープガイドは前述のような欠
点を有しているため、これを補うことのできる表面形状
を種々検討した。前述の第9図の例は樹脂製のテープガ
イドを対象としたものであることが明らかであるが、発
明者はこれらの形状についても検討を加え、試作して実
験を行なった。However, since such tape guides have the above-mentioned drawbacks, we have investigated various surface shapes that can compensate for these drawbacks. It is clear that the example shown in FIG. 9 mentioned above is intended for a tape guide made of resin, but the inventors also studied the shapes of these tape guides, produced prototypes, and conducted experiments.
その結果、第8図に示されるような多数の微小な凹部を
有するものは凹部の形状や寸法などを正確に作るのが容
易でなくて不完全な試作品しか得られず、そのテスト結
果もテープに傷がつきやすくて良い結果が得られなかっ
た。As a result, it is not easy to accurately make the shape and dimensions of the recesses in products with many minute recesses as shown in Figure 8, and only incomplete prototypes are obtained, and the test results are also poor. I could not get good results because the tape was easily scratched.
次に第9図に示されるような形は金属の場合は試作も実
際の生産も容易でなく、また第9図のA。Next, the shape shown in FIG. 9 is not easy to prototype or actually produce if it is made of metal, and the shape shown in FIG.
B 、D 、Eのような突起部の周囲に尖ったエツジを
有する形状の場合は、これらのテープガイドを装着した
テープカセットを高温環境下に長時間放置したときにこ
れらの突起の形がそこに接触しているテープに転写され
てしまって磁気ヘッドとテープの密接な接触を阻害する
ようになることが分った。In the case of shapes with sharp edges around the protrusions such as B, D, and E, the shape of these protrusions may change when the tape cassette with these tape guides is left in a high-temperature environment for a long time. It has been found that the magnetic head is transferred to the tape that is in contact with the magnetic head, which prevents close contact between the magnetic head and the tape.
また、第8図及び第9図のB、Eのようにテープの走行
方向に立ち向かう立ち上がった面を有する形状の場合は
、その部分に掃き貯められた埃等が不定期的に脱落して
テープに付着してテープと磁気ヘッドの接触を阻害する
という、実験では確認することが難しい現象に対する懸
念が残る。In addition, if the shape has a surface that stands up against the running direction of the tape, as shown in B and E in Figures 8 and 9, dust etc. that has been swept up in that area may fall off irregularly and cause the tape to Concerns remain about a phenomenon that is difficult to confirm through experiments, such as adhesion to the tape and obstructing contact between the tape and the magnetic head.
さらに、これらの実験を通じてテープガイドの表面に突
起あるいは凹部を設けてテープの接触面積を減らすとテ
ープとの摩擦係数が減る傾向のあることが確認できた。Furthermore, through these experiments, it was confirmed that when protrusions or recesses are provided on the surface of the tape guide to reduce the contact area with the tape, the coefficient of friction with the tape tends to decrease.
以上のような実験結果や考察を基に発明者は、プレス加
工等の簡易な方法で加工でき、埃等が貯まりに<<、テ
ープに突起等が転写されにくい、という条件を満たす表
面形状を作成選定して比較評価した結果、前述のような
形状・寸法・加工法を最適なものとして導き出したもの
である。Based on the above experimental results and considerations, the inventors have created a surface shape that satisfies the following conditions: it can be processed using simple methods such as press processing, it is difficult for dust to accumulate, and it is difficult for protrusions to be transferred to the tape. As a result of the selection and comparative evaluation, the shape, dimensions, and processing method described above were determined to be optimal.
作 用
かかる構成により、テープガイドの表面に設けられた突
条は尖ったエツジのないゆるやかな曲率を持ち、テープ
の走行方行に延びた突条であるため、テープとの接触面
積が減ってテープとの摩擦係数が繰り返し摩擦を行なっ
ても高くならず、埃等が貯1って脱落する懸念もなく、
またプレスあるいは転造などの方法により容易に安価に
高精度でかかる形状の付与が出来ることとなる。Effect With this configuration, the protrusions provided on the surface of the tape guide have a gentle curvature without sharp edges, and the protrusions extend in the running direction of the tape, reducing the contact area with the tape. The coefficient of friction with the tape does not increase even after repeated friction, and there is no risk of dust etc. accumulating and falling off.
Moreover, such a shape can be easily and inexpensively and highly accurately formed by methods such as pressing or rolling.
実施例
第1図は本発明の一実施例によるテープカセットのテー
プガイドの斜視図であって、テープガイド7にはテープ
の走行方向に多数の突条7aが設けられている。Embodiment FIG. 1 is a perspective view of a tape guide of a tape cassette according to an embodiment of the present invention, and the tape guide 7 is provided with a large number of protrusions 7a in the running direction of the tape.
第2図は突条7aの拡大した断面図であって突条7aは
ほぼ円弧状の断面形状を有している。隣9合う二つの突
条7a、?aの間には溝7bが設けられている。この溝
7bは第3図に示すように工具8に設けられた多数の直
線状の刃先8aがテープガイド7に押しつけられること
によって形成され、第2図における突条7aの突起部の
ほぼ円弧状の断面形状はこの刃先8aによって溝7bが
形成された結果、必然的に、かつ工具による直接の圧力
等が強制を受けない自由形成でもって形成される。FIG. 2 is an enlarged sectional view of the protrusion 7a, and the protrusion 7a has a substantially arcuate cross-sectional shape. Two adjacent protrusions 7a, ? A groove 7b is provided between the grooves a. This groove 7b is formed by pressing a large number of straight cutting edges 8a provided on the tool 8 against the tape guide 7, as shown in FIG. The cross-sectional shape of is naturally formed as a result of the groove 7b being formed by the cutting edge 8a, and is formed freely without being forced by direct pressure or the like from a tool.
その結果、突条7aのテープに接する突起部は尖ったエ
ツジを持たず、また工具8の刃先8aに微小な欠けや傷
等があってもそれらの形状がテープに接する部分に転写
されてテープを傷めるということがなく、さらにテープ
ガイド7にバレル研摩加工を施した後に工具8を押し当
てて突条7aを形成しても突条7aのテープに接する部
分は工具8に当らないからその表面性は損なわれること
がなくて工程編成の順序の自由度が大きい。As a result, the protrusions of the protrusions 7a that come into contact with the tape do not have sharp edges, and even if there are minute chips or scratches on the cutting edge 8a of the tool 8, those shapes are transferred to the parts that come into contact with the tape. Moreover, even if the tool 8 is pressed against the tape guide 7 after barrel polishing to form the protrusion 7a, the part of the protrusion 7a that contacts the tape will not be in contact with the tool 8, so the surface of the tape guide 7 will not be damaged. There is a high degree of freedom in the order of process organization without compromising the quality of the process.
工具8はその刃先8aが直線であるから製作に第8図や
第9図のBに示される形状を得るに必要な工具の場合の
ような放電加工等の加工コストの高い加工が必要で、碌
り、そ、の刃先8aが損耗した場合の修正加工も容易で
ある。また工具8はその実質的に尖った刃先8aのみが
テープガイド7を圧迫するから、その押しつける力は全
体の形状を強制的に創成しようとする場合に比べて極め
て小さくて済む。Since the cutting edge 8a of the tool 8 is straight, manufacturing requires high-cost machining such as electrical discharge machining, as is the case with the tools necessary to obtain the shape shown in FIGS. 8 and 9B. If the cutting edge 8a of the cutting edge 8a is worn out, correction processing is also easy. Moreover, since only the substantially sharp cutting edge 8a of the tool 8 presses against the tape guide 7, the pressing force can be extremely small compared to the case where the entire shape is forcibly created.
工具8はプレスを用いてテープガイド7(この場合は丸
めて円筒にする前の平板)に垂直に押しつけてもよく、
またローラの円周面に刃先8aを形成してテープガイド
7の板材の移動に合せてその刃先8aを回転圧接させる
、いわゆる転造の方式であってもよい。この場合は工具
8は旋盤によって製作できるからその製作や修正はさら
に容易になる。The tool 8 may be pressed vertically against the tape guide 7 (in this case, a flat plate before being rolled into a cylinder) using a press.
Alternatively, a so-called rolling method may be used in which a cutting edge 8a is formed on the circumferential surface of a roller and the cutting edge 8a is rotated and pressed against the movement of the plate material of the tape guide 7. In this case, the tool 8 can be manufactured using a lathe, making its manufacture and modification even easier.
工具8の刃先8aの先端は工具寿命を伸ばす一般的手法
として小さなアールあるいは平坦部が設けられてもよい
。The tip of the cutting edge 8a of the tool 8 may be provided with a small radius or a flat portion as a general method to extend tool life.
テープガイド7は平板の状態あるいはプレスによって丸
めて円筒にされてからバレル研摩加工によって表面粗さ
を0.1ないし0.8μm(ピークツウピーク)の粗さ
に仕上げられる。テープは部分的にテープガイド7に接
触するから、粗さが0.2μm以下でもテープはテープ
ガイド7に張り付きにぐい。The tape guide 7 is in the form of a flat plate or rolled into a cylinder by pressing, and then finished by barrel polishing to a surface roughness of 0.1 to 0.8 μm (peak-to-peak). Since the tape partially contacts the tape guide 7, the tape does not easily stick to the tape guide 7 even if the roughness is 0.2 μm or less.
工具の製作の面から突条7aの間隔は0.1mm以上が
望ましく、テープに対する効果の面からその間隔は2m
111以下が望ましい。From the viewpoint of manufacturing the tool, it is desirable that the interval between the protrusions 7a is 0.1 mm or more, and from the viewpoint of effectiveness on the tape, the interval is 2 m.
Desirably 111 or less.
第2図における突条の高さhは加工の容易性の点から0
.2薗以下が望ましく、テープに対する効果の点から0
.005μm 以上が望ましい。The height h of the protrusion in Fig. 2 is 0 from the viewpoint of ease of processing.
.. 2 or less is desirable, and from the point of view of the effect on the tape, it is 0.
.. 0.005 μm or more is desirable.
工具8がローラである場合は刃先8aはら旋でもよく、
したがって突条7aはテープの走行方向に対して僅かに
傾いていても効果は保たれる。If the tool 8 is a roller, the cutting edge 8a may be spiral,
Therefore, even if the protrusion 7a is slightly inclined with respect to the running direction of the tape, the effect is maintained.
テープガイド7は研削等の回転を伴う加工を受けなくて
済むから閉じた(完全な)円筒である必要はなく、第4
図に示すようにテープに接触する部分だけに限定して使
用材料の節約を図った半円筒状もしくはU字形断面のも
のであってもよい。Since the tape guide 7 does not need to undergo processing involving rotation such as grinding, it does not need to be a closed (complete) cylinder;
As shown in the figure, it may have a semi-cylindrical or U-shaped cross-section, limiting the use of material to only the portion that contacts the tape.
隣り合う突条7aの間隔が広い場合、もしくは溝7bが
浅い場合に突条7aの頂部に多少の平坦部が現れてもよ
い。When the distance between adjacent protrusions 7a is wide, or when the groove 7b is shallow, some flat portions may appear at the tops of the protrusions 7a.
工具8の刃先8aが著しく損耗しない限り、テープガイ
ド70表面に形成される突条7aの高さhやその形状は
ほぼ工具8を押しつける力だけで決まるために多量の生
産を行なう場合もその高さや形状は安定している。Unless the cutting edge 8a of the tool 8 is significantly worn out, the height h and shape of the protrusion 7a formed on the surface of the tape guide 70 are determined almost solely by the force with which the tool 8 is pressed, so the height should be adjusted even when mass production is performed. The shape of the pod is stable.
発明の効果
以上のように本発明によれば高性能で安定した品質のテ
ープガイドを高い生産性で安価に生産することが出来て
、これを用いて安価なテープカセットを供給できるとい
う効果が得られる。Effects of the Invention As described above, according to the present invention, tape guides with high performance and stable quality can be produced at low cost with high productivity, and by using this, inexpensive tape cassettes can be supplied. It will be done.
第1図は本発明の一実施例によるテープカセットのテー
プガイドを示す斜視図、第2図はその部分断面図、第3
図はその製造方法を示す部分断面図、第4図は本発明の
他の実施例によるテープカセットのテープガイドを示す
斜視図、第5図は本発明のテープカセットのテープガイ
ドが適用されるテープカセットの内部の要部を示す平面
図、第6図75会第9図は従来から用いられているテー
プガイドの形状を示す図である。
7・・・−・・テープガイド、7a・・・・・・突条、
h・・・・・・突条の突出高さ、7b・・・・・・溝、
8・・・・・・工具。
代理人の氏名 弁理士 中 尾 敏 男 ほか1名7〜
テープガイド
安−一一架蒸
第1図
第2図
ハ
第3図
第4図
第5図
第6図 第7図FIG. 1 is a perspective view showing a tape guide of a tape cassette according to an embodiment of the present invention, FIG. 2 is a partial sectional view thereof, and FIG.
FIG. 4 is a perspective view showing a tape guide of a tape cassette according to another embodiment of the present invention, and FIG. 5 is a tape to which the tape guide of the tape cassette of the present invention is applied. FIG. 6 is a plan view showing the main parts inside the cassette, and FIG. 9 is a diagram showing the shape of a conventionally used tape guide. 7...Tape guide, 7a...Protrusion,
h...Protrusion height of the protrusion, 7b...Groove,
8...Tools. Name of agent: Patent attorney Toshio Nakao and 1 other person7~
Tape Guide An-11 Frame Evaporation Figure 1 Figure 2 C Figure 3 Figure 4 Figure 5 Figure 6 Figure 7
Claims (4)
けた複数の刃先を強制的に押しつけることによって塑性
変形させ、前記円筒部外周面にテープ走行方向に実質的
に平行な多数の溝を形成すると共に、それらの隣り合う
溝の間に断面略円弧状の突条を形成することを特徴とす
るテープガイドの製造法。(1) A plurality of cutting edges provided on a tool are forcibly pressed against the outer circumferential surface of the cylindrical portion of a metal tape guide to plastically deform the outer circumferential surface of the cylindrical portion, and a large number of grooves substantially parallel to the tape running direction are formed on the outer circumferential surface of the cylindrical portion. 1. A method for manufacturing a tape guide, characterized in that a protrusion having a substantially arcuate cross section is formed between adjacent grooves.
的に平行な多数の溝を有し、かつ前記隣り合う溝の間に
断面略円弧状の突条を形成した請求項1記載の製造法に
より得られた金属製のテープガイドを備えたテープカセ
ット。(2) The manufacturing method according to claim 1, wherein the outer circumferential surface in sliding contact with the tape has a large number of grooves substantially parallel to the tape running direction, and protrusions having a substantially arcuate cross section are formed between the adjacent grooves. A tape cassette with a metal tape guide obtained by the method.
て仕上げられていることを特徴とする請求項2記載のテ
ープカセット。(3) The tape cassette according to claim 2, wherein the surface of the tape guide is finished by barrel polishing.
る請求項2記載のテープカセット。(4) The tape cassette according to claim 2, wherein the tape guide has a substantially semi-cylindrical shape.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63133343A JPH01303683A (en) | 1988-05-31 | 1988-05-31 | Manufacture of tape guide and tape cassette using the tape guide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63133343A JPH01303683A (en) | 1988-05-31 | 1988-05-31 | Manufacture of tape guide and tape cassette using the tape guide |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01303683A true JPH01303683A (en) | 1989-12-07 |
Family
ID=15102503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63133343A Pending JPH01303683A (en) | 1988-05-31 | 1988-05-31 | Manufacture of tape guide and tape cassette using the tape guide |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01303683A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016501418A (en) * | 2012-11-15 | 2016-01-18 | オラクル・インターナショナル・コーポレイション | Thin web optical media guiding method |
-
1988
- 1988-05-31 JP JP63133343A patent/JPH01303683A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016501418A (en) * | 2012-11-15 | 2016-01-18 | オラクル・インターナショナル・コーポレイション | Thin web optical media guiding method |
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