JPH0528599A - Fixed cylinder for information recording and reproducing device - Google Patents
Fixed cylinder for information recording and reproducing deviceInfo
- Publication number
- JPH0528599A JPH0528599A JP3180934A JP18093491A JPH0528599A JP H0528599 A JPH0528599 A JP H0528599A JP 3180934 A JP3180934 A JP 3180934A JP 18093491 A JP18093491 A JP 18093491A JP H0528599 A JPH0528599 A JP H0528599A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- fixed cylinder
- running surface
- recording medium
- tape running
- 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
- 239000011347 resin Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Magnetic Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、テープ状記録媒体を用
いる情報記録再生装置、例えばビデオテープレコーダ
（以下ＶＴＲ）、ＤＡＴなどにおけるテープ走行の安定
化に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to stabilizing tape running in an information recording / reproducing apparatus using a tape-shaped recording medium, such as a video tape recorder (VTR) or DAT.
【０００２】[0002]
【従来の技術】従来の磁気記録再生装置、例えばＶＴＲ
やＤＡＴにおけるシリンダは、磁気ヘッドが取り付けら
れ回転する回転シリンダと、磁気テープを磁気ヘッドに
対して常に所定の位置を走行させるためのリードが形成
されている固定シリンダより構成されている。2. Description of the Related Art A conventional magnetic recording / reproducing apparatus such as a VTR
The cylinder in the or DAT is composed of a rotary cylinder to which a magnetic head is attached and which rotates, and a fixed cylinder in which a lead for always running the magnetic tape at a predetermined position with respect to the magnetic head is formed.
【０００３】従来、これらのシリンダは、一般的にアル
ミニウム合金を鋳造あるいは鍛造し、その後切削加工及
び鏡面加工して製造されている。図６はＤＡＴのアルミ
ニウム合金製の固定シリンダを示す図である。固定シリ
ンダ１に、磁気テープを押し付け所定の位置で走行させ
るためのリード２が形成されている。３はテープ走行面
であり、直接磁気テープと固定シリンダが接触する部分
である。従って、磁気テープとテープ走行面３の間の摩
擦力が大きいとスティックスリップ現象が発生するた
め、再生信号の時間軸変動に大きな影響を与え、再生画
像を著しく劣化させる。また、両者間の大きな摩擦力
は、磁気テープの表面の劣化、テープの永久伸びなど磁
気テープに損傷を与える。Conventionally, these cylinders are generally manufactured by casting or forging an aluminum alloy, followed by cutting and mirror finishing. FIG. 6 is a view showing a fixed cylinder made of DAT aluminum alloy. A lead 2 is formed on the fixed cylinder 1 for pressing the magnetic tape to run the magnetic tape at a predetermined position. Reference numeral 3 denotes a tape running surface, which is a portion where the magnetic tape directly contacts the fixed cylinder. Therefore, when the frictional force between the magnetic tape and the tape running surface 3 is large, a stick-slip phenomenon occurs, which greatly affects the time-axis fluctuation of the reproduction signal and remarkably deteriorates the reproduced image. Further, a large frictional force between the two causes damage to the magnetic tape such as deterioration of the surface of the magnetic tape and permanent elongation of the tape.
【０００４】以上のような理由により、図７のテープ走
行面の拡大図に示すように固定シリンダ１ではテープ走
行面３に故意に凹凸を設け、磁気テープ４とテープ走行
面３との接触面積を減少させ摩擦力を減少させる方式が
一般的に用いられている。For the above reasons, as shown in the enlarged view of the tape running surface of FIG. 7, the fixed cylinder 1 intentionally has irregularities on the tape running surface 3 so that the contact area between the magnetic tape 4 and the tape running surface 3 is increased. Is generally used to reduce frictional force.
【０００５】そして、アルミニウム合金のような金属材
料を加工して固定シリンダを製造する場合、リード２や
テープ走行面３などの複雑な形状を高精度で加工するこ
とはコスト的に不利である。When manufacturing a fixed cylinder by processing a metal material such as aluminum alloy, it is costly to process complicated shapes such as the leads 2 and the tape running surface 3 with high accuracy.
【０００６】そこで、特開昭６０−４０５５０号公報に
記載されているように樹脂を用いて射出成形などでシリ
ンダを成形する方法が提案されている。Therefore, as disclosed in JP-A-60-40550, a method of molding a cylinder by injection molding using a resin has been proposed.
【０００７】[0007]
【発明が解決しようとする課題】上記従来技術では、シ
リンダを金型を用い樹脂成形するさいに生じるパ−ティ
ングライン上のバリによる成形品の表面精度不良の問題
がある。図８に示すように、テープの巻き付け角１８０
°以上のシリンダ５を金型６で成形すると、金型６の割
り面にパ−ティングライン７がテープ走行面に少なくと
も１本残り、その高さは普通１０〜３０μｍ程度にな
り、テープ走行上問題になる。また、図９に示すように
中心軸方向に金型８、９、１０、１１を抜くと、図７に
示すようなテープ走行面の形状を作ることは困難にな
る。The above-mentioned prior art has a problem in that the surface accuracy of the molded product is poor due to burrs on the parting line which occur when the cylinder is resin-molded using a mold. As shown in FIG. 8, the tape winding angle 180
When the cylinder 5 having a temperature of not less than 0 ° is molded by the mold 6, at least one parting line 7 remains on the split surface of the mold 6 on the tape running surface, and its height is usually about 10 to 30 μm. It becomes a problem. Further, if the dies 8, 9, 10, 11 are removed in the central axis direction as shown in FIG. 9, it becomes difficult to form the shape of the tape running surface as shown in FIG.
【０００８】[0008]
【課題を解決するための手段】テープ状記録媒体を用い
情報の記録再生を行う樹脂により成形されている情報記
録再生装置の固定シリンダであって、固定シリンダに形
成され前記テープ状記録媒体の走行位置を規制するリー
ドと、テープ状記録媒体が接触し走行するテープ走行面
とを有し、テープ走行面に、固定シリンダの中心軸方向
に複数の溝が形成されている構成とする。A fixed cylinder of an information recording / reproducing apparatus formed of resin for recording / reproducing information using a tape-shaped recording medium, the tape-shaped recording medium running on the fixed cylinder. The tape has a lead for regulating the position and a tape running surface on which the tape-shaped recording medium comes into contact and travels, and a plurality of grooves are formed on the tape running surface in the central axis direction of the fixed cylinder.
【０００９】[0009]
【作用】本発明によれば、テープ走行面にパ−ティング
ラインを発生させず、安定したテープ走行が得られる。According to the present invention, stable tape running can be obtained without generating a parting line on the tape running surface.
【００１０】[0010]
【実施例】本発明の実施例を図１〜図６を用いて説明す
る。また、同一部品には同一符号を付し説明を省略す
る。なお、図は、磁気テープを１８０°以上巻き付ける
固定シリンダを示している。図１は、第１実施例を示し
ており、図１（ａ）は正面図、図１（ｂ）はテープ走行
面の断面図、図１（ｃ）は側断面図である。図におい
て、樹脂成形されている固定シリンダ１のテープ走行面
３には、断面が波形状の溝１２が固定シリンダ１の中心
軸と平行に等間隔に全周にわたって形成されている。よ
って、テープ走行面３において磁気テープは、波形状の
溝１２の部分だけ接触面積が減少するので、テープ走行
面３と磁気テープとの間の摩擦力が減少する。そして、
固定シリンダ１は回転ヘッド（図示せず）が搭載されて
いる回転シリンダ（図示せず）とは異なり磁気テープと
テープ走行面３の間に空気膜が発生することはないので
溝１２を中心軸方向に設けても問題はない。更に、以上
のような形状の固定シリンダ１は、金型を図９に示すよ
うな構成とし成形できるので、テープ走行面３にパ−テ
ィングラインが発生しない。Embodiments of the present invention will be described with reference to FIGS. Further, the same parts are designated by the same reference numerals and the description thereof will be omitted. The figure shows a fixed cylinder around which the magnetic tape is wound 180 ° or more. FIG. 1 shows a first embodiment, FIG. 1 (a) is a front view, FIG. 1 (b) is a sectional view of a tape running surface, and FIG. 1 (c) is a side sectional view. In the figure, on a tape running surface 3 of a fixed cylinder 1 which is resin-molded, grooves 12 having a corrugated cross section are formed in parallel with the central axis of the fixed cylinder 1 at equal intervals over the entire circumference. Therefore, since the contact area of the magnetic tape on the tape running surface 3 is reduced only by the corrugated groove 12, the frictional force between the tape running surface 3 and the magnetic tape is reduced. And
Unlike the rotary cylinder (not shown) on which the rotary head (not shown) is mounted, the fixed cylinder 1 does not generate an air film between the magnetic tape and the tape running surface 3, so that the groove 12 has a central axis. There is no problem even if it is installed in the direction. Further, since the fixed cylinder 1 having the above-described shape can be formed by forming the mold as shown in FIG. 9, no parting line is generated on the tape running surface 3.
【００１１】図２に第２実施例を示す。図２はテープ走
行面の断面図を示しており、テープ走行面３には断面が
三角形状の溝１３が固定シリンダ１の中心軸方向に等間
隔に全周にわたって形成されている。また、図３に第３
実施例を示す。図３はテープ走行面の断面図を示してお
り、テープ走行面３には断面が長方形状の溝１４が固定
シリンダ１の中心軸方向に等間隔に全周にわたって形成
されている。そして、図４に第４実施例を示す。図４は
固定シリンダ１の側面図を示しており、テープ走行面３
にはリード２から遠ざかるにつれて幅が広くなる溝１５
が固定シリンダ１の中心軸方向に等間隔に全周にわたっ
て形成されている。上述の第２、第３及び第４実施例も
第１実施例と同様な効果を得ることができる。また、溝
１２、１３、１４、１５は固定シリンダ１の全周にわた
って形成されているが、磁気テープが接触する部分だけ
でもよい。更に、溝１２、１３、１４、１５は、等間隔
に形成されているが、磁気テープとの接触面積が磁気テ
ープ入口側Ａから出口側Ｂにかけて一定となるように溝
１２、１３、１４、１５の幅を変化させてもよい。FIG. 2 shows a second embodiment. FIG. 2 shows a sectional view of the tape running surface. Grooves 13 having a triangular cross section are formed on the tape running surface 3 at equal intervals in the central axis direction of the fixed cylinder 1 over the entire circumference. Also, in FIG.
An example is shown. FIG. 3 shows a cross-sectional view of the tape running surface. Grooves 14 having a rectangular cross section are formed on the tape running surface 3 at equal intervals along the entire circumference in the central axis direction of the fixed cylinder 1. Then, FIG. 4 shows a fourth embodiment. FIG. 4 is a side view of the fixed cylinder 1, which shows the tape running surface 3
The groove 15 has a width that increases with distance from the lead 2.
Are formed at equal intervals over the entire circumference in the central axis direction of the fixed cylinder 1. The above-mentioned second, third and fourth embodiments can also obtain the same effect as the first embodiment. Further, the grooves 12, 13, 14, and 15 are formed over the entire circumference of the fixed cylinder 1, but they may be formed only at the portions in contact with the magnetic tape. Further, the grooves 12, 13, 14, 15 are formed at equal intervals, but the grooves 12, 13, 14, so that the contact area with the magnetic tape is constant from the magnetic tape inlet side A to the magnetic tape outlet side B. The width of 15 may be changed.
【００１２】次に図５を用いて第５実施例を説明する。
テープ走行面３には、磁気テープの入口側Ａから出口側
Ｂにかけて磁気テープとの接触面積が変化しないように
固定シリンダ１の中心軸方向に形成された溝１６と、溝
１６につながりその上方に位置する溝１７が形成されて
いる。また、溝１６が形成されていなくても良い。よっ
て、磁気テープの入口側Ａから出口側Ｂにかけて磁気テ
ープとテープ走行面の接触面積が増加しないので、摩擦
力が増加せず安定したテープ走行が得られ、第１実施例
と同様の効果が得られる。Next, a fifth embodiment will be described with reference to FIG.
On the tape running surface 3, a groove 16 formed in the central axis direction of the fixed cylinder 1 from the inlet side A to the outlet side B of the magnetic tape so that the contact area with the magnetic tape does not change, and above the groove 16 The groove 17 located at is formed. Further, the groove 16 may not be formed. Therefore, since the contact area between the magnetic tape and the tape running surface does not increase from the entrance side A to the exit side B of the magnetic tape, stable tape running can be obtained without increasing the frictional force, and the same effect as the first embodiment can be obtained. can get.
【００１３】[0013]
【発明の効果】以上のように本発明によれば、固定シリ
ンダのテープ走行面にパ−ティングラインを発生させる
ことなく、樹脂により固定シリンダを成形することがで
き、テープ走行面に溝を形成し、テープとテープ走行面
との間の接触面積を減少させることにより摩擦力が減少
し安定したテープ走行が得られ、テープを損傷すること
もない。As described above, according to the present invention, the fixed cylinder can be molded with resin without forming a parting line on the tape running surface of the fixed cylinder, and the groove is formed on the tape running surface. However, by reducing the contact area between the tape and the tape running surface, the frictional force is reduced, stable tape running is obtained, and the tape is not damaged.
【図１】本発明の第１実施例を説明するための図であ
る。FIG. 1 is a diagram for explaining a first embodiment of the present invention.
【図２】本発明の第２実施例を説明するための図であ
る。FIG. 2 is a diagram for explaining a second embodiment of the present invention.
【図３】本発明の第３実施例を説明するための図であ
る。FIG. 3 is a diagram for explaining a third embodiment of the present invention.
【図４】本発明の第４実施例を説明するための図であ
る。FIG. 4 is a diagram for explaining a fourth embodiment of the present invention.
【図５】本発明の第５実施例を説明するための図であ
る。FIG. 5 is a diagram for explaining a fifth embodiment of the present invention.
【図６】従来の固定シリンダの側断面図。FIG. 6 is a side sectional view of a conventional fixed cylinder.
【図７】従来のテープ走行面の拡大断面図。FIG. 7 is an enlarged cross-sectional view of a conventional tape running surface.
【図８】金型を割る方向によるパ−ティングラインの発
生を説明するための図。FIG. 8 is a view for explaining the generation of a parting line depending on the direction of breaking the mold.
【図９】固定シリンダの中心軸方向に金型を割る方法を
説明するための図。FIG. 9 is a view for explaining a method of breaking the mold in the central axis direction of the fixed cylinder.
１ 固定シリンダ ２ リード ３ テープ走行面 １２ 溝 １３ 溝 １４ 溝 １５ 溝 １６ 溝 １７ 溝 1 fixed cylinder 2 leads 3 Tape running surface 12 grooves 13 groove 14 groove 15 grooves 16 grooves 17 groove
Claims (2)
を行う樹脂により成形されている情報記録再生装置の固
定シリンダであって、前記固定シリンダに形成され、前
記テープ状記録媒体の走行位置を規制するリードと、前
記テープ状記録媒体が接触し走行するテープ走行面とを
有し、前記テープ走行面に、前記固定シリンダの中心軸
方向に複数の溝が形成されていることを特徴する情報記
録再生装置の固定シリンダ。1. A fixed cylinder of an information recording / reproducing apparatus, which is molded from resin for recording / reproducing information using a tape-shaped recording medium, wherein the fixed cylinder is formed on the fixed cylinder and the traveling position of the tape-shaped recording medium is set. Information having a lead for regulation and a tape running surface on which the tape-shaped recording medium comes into contact and travels, and a plurality of grooves are formed on the tape running surface in the central axis direction of the fixed cylinder. Fixed cylinder for recording / playback device.
体の入口側から出口側にかけて前記テープ状記録媒体と
前記テープ走行面との接触面積が一定となるように溝を
設けたことを特徴とする請求項１記載の情報記録再生装
置。2. A groove is provided on the tape running surface so that the contact area between the tape recording medium and the tape running surface is constant from the entrance side to the exit side of the tape recording medium. The information recording / reproducing apparatus according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3180934A JPH0528599A (en) | 1991-07-22 | 1991-07-22 | Fixed cylinder for information recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3180934A JPH0528599A (en) | 1991-07-22 | 1991-07-22 | Fixed cylinder for information recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0528599A true JPH0528599A (en) | 1993-02-05 |
Family
ID=16091834
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3180934A Pending JPH0528599A (en) | 1991-07-22 | 1991-07-22 | Fixed cylinder for information recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0528599A (en) |
-
1991
- 1991-07-22 JP JP3180934A patent/JPH0528599A/en active Pending
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