JPS5843106Y2 - Reel hub for magnetic tape cartridge - Google Patents
Reel hub for magnetic tape cartridgeInfo
- Publication number
- JPS5843106Y2 JPS5843106Y2 JP1979121417U JP12141779U JPS5843106Y2 JP S5843106 Y2 JPS5843106 Y2 JP S5843106Y2 JP 1979121417 U JP1979121417 U JP 1979121417U JP 12141779 U JP12141779 U JP 12141779U JP S5843106 Y2 JPS5843106 Y2 JP S5843106Y2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- locking
- locking piece
- piece
- reel hub
- 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.)
- Expired
Links
Landscapes
- Storage Of Web-Like Or Filamentary Materials (AREA)
Description
【考案の詳細な説明】
本案は磁気テープカートリッジにおけるリールハブの改
良に関するものであり、特にテープエンドをリールハブ
の外周面に設けた凹所に鞍形のテープ係止片を嵌着する
ことにより係虚するリールハブにおいて、テーパ係止片
の表面に生ずる凹凸面を無くし、バブ表面と同様な適切
な巻取面が得られるよ5にしたことを目的とするもので
ある。[Detailed description of the invention] This invention relates to an improvement of the reel hub of a magnetic tape cartridge. In particular, the tape end is fixed in a recess formed on the outer circumferential surface of the reel hub by fitting a saddle-shaped tape locking piece into the reel hub. The object of the present invention is to eliminate uneven surfaces occurring on the surface of the tapered locking piece in a reel hub for use in the reel hub, and to obtain a suitable winding surface similar to the surface of the bub.
磁気テープを巻付けるためのリールハブは、局長方向に
は真円であると共に、幅方向に対してどの部分もフラッ
トであることが理想的である。Ideally, a reel hub for winding a magnetic tape should be a perfect circle in the direction of the tape, and be flat in all parts in the width direction.
しかるに従来におけるリールハブのうち、第1図に示す
如くバブ1の外周面に凹所2を設けて、この凹所2に鞍
形のテープ係止片3を嵌着することによりテープエンド
4を係止する形式のものにおいては、バブ外周面の一部
がテープ係止片3の表面によって形成されるため、バブ
1自体の表面を適正に仕上げても、テープ係止片3の表
面が凹凸を有する場合には全体として適正な巻取面を得
ることができないという結果になる。However, in the conventional reel hub, as shown in FIG. 1, a recess 2 is provided on the outer peripheral surface of the bub 1, and a saddle-shaped tape locking piece 3 is fitted into the recess 2 to lock the tape end 4. In the case of the type of bub, a part of the outer peripheral surface of the bub is formed by the surface of the tape locking piece 3, so even if the surface of the bub 1 itself is properly finished, the surface of the tape locking piece 3 may have unevenness. If there is a winding surface, the result is that an appropriate winding surface cannot be obtained as a whole.
即ち従来において、この種のリールハブにおけるテープ
係止片は、リールハブ1とは別個に射出成形されたもの
であり、成形のmで表面3′を長さ方向はバブ1の曲率
と同じ曲率の弧面とし、幅方向はフラットな面となるよ
うな形で成形するにも拘らず、成形後金型から取外され
た時点では樹脂の収縮による所謂ヒケが発生して、第2
図及び第、3図に示す如(、幅方向にフラットでなく凹
んだ形となり、リールハブ1はテープ係止片3の表面3
′部分が適正な巻取面でない状態となる。That is, in the past, the tape locking piece in this type of reel hub was injection molded separately from the reel hub 1, and the lengthwise direction of the surface 3' was formed into an arc having the same curvature as the curvature of the bubble 1. Even though the molding is done in such a way that the surface is flat in the width direction, so-called sink marks occur due to shrinkage of the resin when the mold is removed from the mold after molding.
As shown in FIGS.
' portion is not a proper winding surface.
しかも従来においてこのようなテープ係止片3は、テー
プエンド4を挟着するに際して、両端の係止脚5が夫々
内側方向に押圧された形でリールハブ1の凹所2内に嵌
着され、従ってテープエンド4を挾んだ係止片3の係止
脚5は凹所2内に対して、第3図において矢印にて示す
係止脚5の内側に向う反発力を受けることになる。Moreover, in the past, such a tape locking piece 3 is fitted into the recess 2 of the reel hub 1 with the locking legs 5 at both ends pressed inwardly when the tape end 4 is clamped. Accordingly, the locking leg 5 of the locking piece 3 that holds the tape end 4 is subjected to a repulsive force in the recess 2 toward the inside of the locking leg 5 as indicated by the arrow in FIG.
このため第3図に示す如くテープ係止片の表面3′には
、矢印の如く引張り力Tが作用することとなり、該係止
片表面3′における前記の射出成形後のヒケによる凹み
現象が更に助成されて、凹みが更に大きくなるという問
題がある。Therefore, as shown in FIG. 3, a tensile force T acts on the surface 3' of the tape locking piece as shown by the arrow, and the denting phenomenon caused by the sink mark after injection molding on the surface 3' of the locking piece is prevented. There is a problem that the dent becomes even larger due to further support.
このようにテープ係止片表面3′が凹んだ状態となって
いると、磁気テープをリールハブ1に巻き込んだ際、最
近のテープは厚さが薄くなっているために、前記係止片
表面3′の凹みがテープにヒズ□を与えることとなる。If the tape locking piece surface 3' is in a recessed state, when the magnetic tape is wound around the reel hub 1, since recent tapes are thinner, the locking piece surface 3' The dent ′ will give the tape a scratch □.
この場合そのヒズミはバブ1の表面から第1周回目、第
2周回目のみにとどまらず、上方のかなりの周域にまで
伝播し、第4図の如くリールにはそのヒズミの影響を受
ける部分が放射状に表われることとなる。In this case, the distortion is not limited to only the first and second rotations from the surface of the bubble 1, but also propagates to a considerable area above, and as shown in Figure 4, the reel has a part affected by the distortion. will appear radially.
このような磁気テープをテープデツキにかんで再生した
場合には、ヒズミの影響を受ける部分が再生ヘッドの部
分に来ると、テープのヘッドに対する接触状態が適切に
行われないために、その部分に出力低下現象を生ずると
いう問題がある。When playing such a magnetic tape on a tape deck, if the area affected by distortion comes to the playback head, the tape will not be in proper contact with the head, and the output will not be output to that area. There is a problem in that a deterioration phenomenon occurs.
本案はこのような従来のリールハブの問題点を解消し、
テープ係止片の表面を幅方向にフラットな状態とし、従
って磁気テープにヒズミを与えることのない適正な巻取
面を得られるようなリールハブの提供を目的としたもの
である。This project solves these problems of conventional reel hubs,
The object of the present invention is to provide a reel hub in which the surface of the tape locking piece is made flat in the width direction, thereby providing a proper winding surface without causing distortion to the magnetic tape.
このようなリールハブを得るために、本案においては、
リールハブの外周に設けるテープ係止片嵌着用O凹所中
炎に定着片を突設すると共に、鞍形のテープ係止片の両
端係止脚が、この定着片の両側面に対して夫々内側に向
うような係止応力が与えられるようにしたことを特徴と
するものである。In order to obtain such a reel hub, in this proposal,
A fixing piece is provided protruding in the O-recess for fitting the tape locking piece provided on the outer periphery of the reel hub, and the locking legs at both ends of the saddle-shaped tape locking piece are located on the inner side of both sides of the fixing piece. This feature is characterized in that a locking stress is applied such that the locking stress is directed toward the
次に本案を第5図以下に示す実施例に基いて詳記すれば
、第5図は本案に係るテープ係止片13の構成を示す側
面図であり、第6図はリールバフ11の凹所12内にテ
ープ係止片13が嵌着された状態の側面図である。Next, the present invention will be described in detail based on the embodiment shown in FIG. 12 is a side view of a state in which the tape locking piece 13 is fitted into the inside of the tape locking piece 12. FIG.
テープ係止片13の射出成形に際しては、表面13′の
長さ方向の曲率がリールハブ110曲率よりもやや小さ
くなるような形で幅方向にはフラットな形となると共に
、両端の係止脚15は先端の鉤部16が夫々内側方向に
向い合うような形で成形される。When the tape locking piece 13 is injection molded, the curvature in the length direction of the surface 13' is slightly smaller than the curvature of the reel hub 110, and the shape is flat in the width direction. are formed such that the hook portions 16 at the tips thereof face each other inward.
このように成形されたテープ係止片13はこれを金型よ
り抜出した後においては、表面13′が弧状に形成され
ていることにより、第1図に示す如く、従来のテープ係
止片と同様に樹脂の収縮により表面13′が幅方向に僅
かに凹むことになる。After the tape locking piece 13 molded in this way is extracted from the mold, the surface 13' is formed in an arc shape, and as shown in FIG. 1, it is different from the conventional tape locking piece. Similarly, the surface 13' is slightly recessed in the width direction due to contraction of the resin.
一方このテープ係止片13を嵌め込むためのり−ルハブ
1の凹所12内には、バブ1の成形の段階でテープ係止
片13の両係止脚15,15の間に嵌着される定着片1
γが突設されるようになっている。On the other hand, in the recess 12 of the glue hub 1 into which the tape locking piece 13 is fitted, it is fitted between both locking legs 15, 15 of the tape locking piece 13 at the stage of molding the bubble 1. Fixing piece 1
γ is provided in a protruding manner.
この定着片1γの両側には夫々前記テープ係止片13の
係止脚先端における鉤部16が嵌り込む雌形の凹欠部1
8が設けられると共に、該定着片17は両雄形凹欠部1
8,18間の距離W1が成形された前記テープ係止片1
3の両係止脚先端における鉤部t6.i6間の距離W2
よりも若干大きくなるように形成されている。On both sides of this fixing piece 1γ, there are female-shaped recessed notches 1 into which the hooks 16 at the tips of the locking legs of the tape locking piece 13 are fitted.
8 is provided, and the fixing piece 17 is provided with a hermaphrodite recessed part 1
The tape locking piece 1 is formed with a distance W1 between 8 and 18.
The hook portion t6 at the tip of both locking legs of No.3. Distance W2 between i6
It is formed to be slightly larger than the
更にリールハブ1の凹所12は、第6図に示すようにテ
ープ係止片13の両係止脚is、isを押し拡げた形で
凹所12に対し側面から嵌め込む際に便利なように、両
側端19を定着片17の両雄形凹欠部18から大きく離
した形として、係止脚15の可動スペース20が設けら
れるようになっている。Furthermore, the recess 12 of the reel hub 1 is designed so that it is convenient when fitting the tape locking piece 13 into the recess 12 from the side with the two locking legs IS, IS of the tape locking piece 13 being pushed apart as shown in FIG. A movable space 20 for the locking leg 15 is provided by separating both side ends 19 from the double male-shaped recessed portion 18 of the fixing piece 17.
チー7”1%止片13によるテープエンド4のILLは
、第6図に示す如くまずテープエンド4を凹所12の定
着片1γ上に配置した状態で、テープ係止片13の両係
止脚15,15を夫々外側方向に押し拡げた形で両係止
脚15.15が定着片11を抱きかかえる形となるよう
に凹所12内に嵌着する。ILL of the tape end 4 by the 1% locking piece 13 is performed by first placing the tape end 4 on the fixing piece 1γ of the recess 12, as shown in FIG. The legs 15, 15 are fitted into the recess 12 in such a manner that the locking legs 15, 15 are each pushed outward and are in a shape that hugs the fixing piece 11.
これにより両係止脚15,15は先端の鉤部16が夫々
テープエンド4を挟着する形で定着片11の雌形凹欠部
18,18に嵌合するが、定着片1γの幅Wlは、両係
止脚t5.iS間の距離W2よりも若干大きいので、両
係止脚15.15には夫々内側に向けてテープエンドの
係止応力が作用し、テープエンド4を定着片110両側
面に圧接挟着することとなる。As a result, both the locking legs 15, 15 fit into the female-shaped recessed portions 18, 18 of the fixing piece 11 in such a way that the hook portions 16 at the tips thereof pinch the tape end 4, respectively, but the width Wl of the fixing piece 1γ are both locking legs t5. Since the distance between iS is slightly larger than the distance W2, the tape end's locking stress acts inward on both locking legs 15 and 15, respectively, and the tape end 4 is pressure-bonded and clamped to both sides of the fixing piece 110. becomes.
このようにテープ係止片13の両係止脚15゜15が、
定着片17を両側から挾み付けるような形で凹所12内
に嵌着された状態においては、常に両係止脚15.15
には内側に向く係止応力が与えられ第8図に示す如く外
側に向う反撥力を受けることになり、従って係止片13
の表面13′には常に圧縮力Cが作用することとなる。In this way, both the locking legs 15°15 of the tape locking piece 13 are
When the fixing piece 17 is fitted into the recess 12 in such a way that it is sandwiched from both sides, both locking legs 15 and 15 are always attached.
is given an inward locking stress and receives an outward repulsive force as shown in FIG. 8, so that the locking piece 13
A compressive force C always acts on the surface 13'.
その結果係止片表面13′は***する形となり、射出成
形後に生じた表面13′のヒケによる凹みは前記の圧縮
力Cに基く***作用により打消され、表面13′は第9
図に示す如く幅方向に対して平坦な面を形成することと
なる。As a result, the locking piece surface 13' has a raised shape, and the dents caused by sink marks on the surface 13' after injection molding are canceled out by the raised action based on the compressive force C, and the surface 13'
As shown in the figure, a flat surface is formed in the width direction.
以上の如く本案によるリールハブは、テープ係止片13
の係止脚15が凹所12内に嵌着された状態で、該係止
脚15によるテープエンド係止応力が内側に向くように
したので、外側に向う反撥力を受は係止片表面13′は
***して成形後の樹脂の収縮によって生ずる凹みが打消
されて輻方向に平坦な面とすることができ、従ってリー
ルハブの全周にわたって適正な巻取面を得ることができ
るので従来品の如くテープ係止片部分に接する磁気テー
プに対してヒズミを与えることを防ぎ、出力低下の生じ
ない良好な磁気テープカートリッジが得られるという実
益を有するものである。As described above, the reel hub according to the present invention has the tape locking piece 13.
When the locking leg 15 is fitted into the recess 12, the tape end locking stress due to the locking leg 15 is directed inward, so that the repulsive force directed outward is received by the surface of the locking piece. 13' is raised to cancel out the dents caused by the contraction of the resin after molding, making it possible to create a flat surface in the radial direction. Therefore, it is possible to obtain an appropriate winding surface over the entire circumference of the reel hub, which is different from conventional products. This has the practical benefit of preventing distortion from being applied to the magnetic tape in contact with the tape locking piece portion, and providing a good magnetic tape cartridge that does not cause a drop in output.
第1図は従来のリールハブにおけるテープ係止片の構成
を示すハブ側面図、第2図は第1図の■−■線における
断面図、第3図はリールハブ凹所に嵌着された状態のテ
ープ係止片の斜視図、第4図はテープに生じたヒズミの
伝播状態を示すテープリールの側面図、第5図は本案に
係るテープ係止片の構成を示す側面図、第6図は係止片
の係合状態を示す側面図、第1図は第5図の■−■線に
おける断面図、第8図は本案に係るテープ係止片のリー
ルハブ凹所に対する係合状態時の斜視図、第9図は第6
図におけるIX−IX線における断面図である。
図において、1,11・・・・・・リールハブ、2,1
2・・・・・・凹所、3,13・・・・・・テープ係止
片、3’、13’・・・・・・係止片表面、4・・・・
・・テープエンド、5,15・・・・・・係止脚、16
・・・・・・鉤部、1γ・・・・・・定着片、18・・
・・・・雌形凹欠部、19・・・・・・凹所両側端、2
0・・・・・・可動スペース。Fig. 1 is a side view of a conventional reel hub showing the configuration of the tape locking piece, Fig. 2 is a cross-sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a view of the reel hub fitted in the reel hub recess. FIG. 4 is a side view of the tape reel showing the state of propagation of distortion generated in the tape; FIG. 5 is a side view showing the structure of the tape locking piece according to the present invention; FIG. FIG. 1 is a sectional view taken along the line ■-■ in FIG. 5; FIG. 8 is a perspective view of the tape locking piece according to the present invention when it is engaged with the reel hub recess. Figure 9 is the 6th
It is a sectional view taken along the line IX-IX in the figure. In the figure, 1, 11... Reel hub, 2, 1
2... Recess, 3, 13... Tape locking piece, 3', 13'... Locking piece surface, 4...
... Tape end, 5, 15 ... Locking leg, 16
...Hook part, 1γ...Fixing piece, 18...
...Female recess notch, 19...Both ends of recess, 2
0...Movable space.
Claims (1)
嵌着してテープエンドを挟着固定するリールハブにおい
て、テープ係止片13が嵌着される凹所12には、両側
面下部に夫々テープ係止片両端の係止脚15における内
向きの鉤部16が嵌り込む凹欠部18を設けた中央部の
定着片11と、該凹欠部18の対向側に凹所両端面19
を凹欠部18から大きく離すようにした可動スペース2
0とを設け、テープ係止片13を両鉤部16間の距離W
2が定着片17の凹欠部18間の距離W1よりも若干小
さくなるように成形することにより、係止脚15が定着
片17の両側から外側に向けて反撥力を受げることによ
り係止片表面13′に圧縮力を作用させて係止片表面1
3′の歪みを矯正させた磁気テープカートリッジ用リー
ルハブ。In a reel hub in which a saddle-shaped tape locking piece is fitted into a recess provided in a part of the outer circumferential surface to clamp and fix the tape end, the recess 12 into which the tape locking piece 13 is fitted has two sides. A fixing piece 11 in the center has a recessed part 18 on the lower part of the surface into which the inward hooks 16 of the locking legs 15 at both ends of the tape securing piece are fitted, and a recessed part on the opposite side of the recessed part 18. Both end faces 19
The movable space 2 is separated from the recessed part 18 by a large distance.
0, and the tape locking piece 13 is set at a distance W between both hook parts 16.
2 is formed so that it is slightly smaller than the distance W1 between the concave notches 18 of the fixing piece 17, so that the locking legs 15 receive repulsive force outward from both sides of the fixing piece 17, thereby locking the locking leg 15. By applying a compressive force to the locking piece surface 13', the locking piece surface 1
Reel hub for magnetic tape cartridges with 3' distortion corrected.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979121417U JPS5843106Y2 (en) | 1979-09-04 | 1979-09-04 | Reel hub for magnetic tape cartridge |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1979121417U JPS5843106Y2 (en) | 1979-09-04 | 1979-09-04 | Reel hub for magnetic tape cartridge |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5641876U JPS5641876U (en) | 1981-04-17 |
JPS5843106Y2 true JPS5843106Y2 (en) | 1983-09-29 |
Family
ID=29353562
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1979121417U Expired JPS5843106Y2 (en) | 1979-09-04 | 1979-09-04 | Reel hub for magnetic tape cartridge |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5843106Y2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54113318A (en) * | 1978-02-24 | 1979-09-04 | Dai Ichi Seiko Co Ltd | Hub for cassette tape |
-
1979
- 1979-09-04 JP JP1979121417U patent/JPS5843106Y2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS54113318A (en) * | 1978-02-24 | 1979-09-04 | Dai Ichi Seiko Co Ltd | Hub for cassette tape |
Also Published As
Publication number | Publication date |
---|---|
JPS5641876U (en) | 1981-04-17 |
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