JPH05314602A - Rotary drum - Google Patents
Rotary drumInfo
- Publication number
- JPH05314602A JPH05314602A JP4115592A JP11559292A JPH05314602A JP H05314602 A JPH05314602 A JP H05314602A JP 4115592 A JP4115592 A JP 4115592A JP 11559292 A JP11559292 A JP 11559292A JP H05314602 A JPH05314602 A JP H05314602A
- Authority
- JP
- Japan
- Prior art keywords
- unit
- rotating
- fixed
- rotary
- magnetic head
- 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.)
- Withdrawn
Links
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は磁気記録再生装置に使用
される回転ドラムに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary drum used in a magnetic recording / reproducing apparatus.
【0002】[0002]
【従来の技術】従来の回転ドラムは、図2に示すよう
に、磁気ヘッド23が取付けられて回転する回転部21
と、回転部を回転させ支持する固定部22とから成って
いる。2. Description of the Related Art As shown in FIG. 2, a conventional rotating drum has a rotating portion 21 to which a magnetic head 23 is attached and which rotates.
And a fixed portion 22 for rotating and supporting the rotating portion.
【0003】ここで、磁気ヘッド23は、回転部21の
表面に設けられた窓24から十数ミクロン突出して固定
されており、回転ドラム上にヘリカル状に巻かれて走行
する磁気テープ25に対して情報信号の記録再生を行
う。Here, the magnetic head 23 is fixed so as to protrude from the window 24 provided on the surface of the rotating portion 21 by a few tens of microns, and the magnetic head 25 is wound around the rotating drum in a helical shape and runs. To record and reproduce the information signal.
【0004】ところで、磁気ヘッド23と磁気テープ2
5との間に空気の流れによって流体力(エァフィルム)
が発生するが、窓24により空気を逃すことによって流
体力が一定になるようにしている。By the way, the magnetic head 23 and the magnetic tape 2
Fluid force due to the flow of air between (5)
However, the fluid force is made constant by letting air escape through the window 24.
【0005】[0005]
【発明が解決しようとする課題】上述した従来の回転ド
ラムでは、窓を設けて空気を逃すことにより、磁気ヘッ
ドと磁気テープとの間に発生する流体力が一定になるよ
うにしている。しかしながら、回転部21と固定部22
との境界部分には隙間26があり、この隙間の近くに窓
24を設ける必要があるため、隙間の影響を受けて流体
力を均一にすることは困難であり、安定した記録再生が
できないという問題点がある。In the conventional rotary drum described above, a window is provided to allow air to escape so that the fluid force generated between the magnetic head and the magnetic tape becomes constant. However, the rotating portion 21 and the fixed portion 22
Since there is a gap 26 at the boundary portion between and, and it is necessary to provide the window 24 near this gap, it is difficult to make the fluid force uniform due to the influence of the gap, and stable recording / reproduction cannot be performed. There is a problem.
【0006】本発明の目的は、回転部と固定部との隙間
の影響を除去して流体力を均一にでき、安定した高品質
の記録再生が可能な回転ドラムを提供することにある。An object of the present invention is to provide a rotary drum capable of removing the influence of the gap between the rotating portion and the fixed portion to make the fluid force uniform and capable of stable recording and reproduction of high quality.
【0007】[0007]
【課題を解決するための手段】本発明の回転ドラムは、
磁気ヘッドが取付けられて回転する回転部と、この回転
部を回転支持する固定部と、前記回転部と固定部との境
界端面の前記固定部側に設けられて微小振動する電気機
械変換部と、前記回転部の境界端面に圧接して前記超音
波振動を伝達する摺動部とを備えて構成されている。ま
た、前記電気機械変換部は、前記回転部の回転時に超音
波振動し、前記回転部の回転停止時に超音波振動を停止
するように構成される。The rotary drum of the present invention comprises:
A rotating part to which the magnetic head is attached and rotates, a fixed part that rotatably supports the rotating part, and an electromechanical conversion part that is provided on the fixed part side of the boundary end surface between the rotating part and the fixed part and vibrates minutely. And a sliding portion that is in pressure contact with the boundary end surface of the rotating portion and transmits the ultrasonic vibration. In addition, the electromechanical conversion unit is configured to vibrate ultrasonically when the rotating unit rotates and stop ultrasonic vibration when the rotating unit stops rotating.
【0008】[0008]
【実施例】次に本発明について図面を参照して説明す
る。The present invention will be described below with reference to the drawings.
【0009】図1は本発明の一実施例を示す図であり、
(a)は斜視図、(b)はA−A切断線からみた断面図
である。FIG. 1 is a diagram showing an embodiment of the present invention.
(A) is a perspective view, (b) is sectional drawing seen from the AA cutting line.
【0010】さて、回転ドラムは、磁気ヘッド13が窓
14に取付けられて回転する回転部11と、回転部を回
転させ支持する固定部12とから成っており、回転ドラ
ム上にヘリカル状に巻かれて走行する磁気テープ15に
対して情報信号の記録再生を行う。The rotary drum is composed of a rotary portion 11 in which a magnetic head 13 is attached to a window 14 for rotation, and a fixed portion 12 for rotating and supporting the rotary portion. The rotary drum is helically wound on the rotary drum. Information signals are recorded / reproduced on / from the magnetic tape 15 running while being run over.
【0011】ところで、回転部11と固定部12との境
界端面の隙間を埋めるように、電気機械変換部16およ
び摺動部17が固定部12側に接合されている。ここ
で、電気機械変換部16は、圧電材あるいは電歪材等で
形成されて電気信号を外部から印加されて微小振動す
る。また、摺動部17は、耐磨耗材で形成されて回転部
11側の境界端面に圧接し、電気機械変換部の振動を伝
達する。By the way, the electromechanical conversion portion 16 and the sliding portion 17 are joined to the fixed portion 12 side so as to fill the gap at the boundary end surface between the rotating portion 11 and the fixed portion 12. Here, the electromechanical conversion unit 16 is made of a piezoelectric material, an electrostrictive material, or the like, and an electric signal is externally applied to cause a slight vibration. Further, the sliding portion 17 is made of a wear resistant material and is pressed against the boundary end surface on the rotating portion 11 side to transmit the vibration of the electromechanical conversion portion.
【0012】周知のように、2つの圧接した物体の一方
に超音波振動を与えた場合は、圧接面は微小変位して摩
擦は無くなる。従って、回転部11を回転させるとき
は、電気機械変換部16に20kHz以上の電気信号を
印加して超音波振動させることにより、固定部との摩擦
が無くなり、回転部は自由に回転する。なお、回転部1
1の回転を停止させるときは、電気機械変換部の励振を
停止することにより圧接力により急速に停止させること
ができる。As is well known, when ultrasonic vibration is applied to one of two pressure-contacted objects, the pressure-contact surface is slightly displaced to eliminate friction. Therefore, when rotating the rotating part 11, by applying an electric signal of 20 kHz or more to the electromechanical conversion part 16 to cause ultrasonic vibration, friction with the fixed part is eliminated, and the rotating part freely rotates. The rotating unit 1
When the rotation of No. 1 is stopped, the excitation of the electromechanical conversion unit is stopped so that the rotation can be rapidly stopped by the pressure contact force.
【0013】このようにすることにより、回転部11と
固定部12との隙間はミクロン単位となり空気流体の乱
れは生じないので、磁気ヘッドと磁気テープとの間に発
生する流体力は均一となり、従って、安定した記録再生
が可能になる。By doing so, the gap between the rotating portion 11 and the fixed portion 12 is in the unit of micron, and the air fluid is not disturbed, so that the fluid force generated between the magnetic head and the magnetic tape becomes uniform, Therefore, stable recording / reproducing is possible.
【0014】[0014]
【発明の効果】以上説明したように本発明によれば、回
転部と固定部との隙間に、超音波振動する電気機械変換
部および超音波振動を回転部に伝達する摺動部を設けて
隙間を微小にすることにより、隙間によって発生する空
気流体の乱れを除去でき、磁気ヘッドと磁気テープとの
間に発生する流体力を均一にでき、安定した高品質の記
録再生が可能になる。As described above, according to the present invention, the electromechanical conversion section for ultrasonic vibration and the sliding section for transmitting ultrasonic vibration to the rotary section are provided in the gap between the rotary section and the fixed section. By making the gap small, the turbulence of the air fluid generated by the gap can be removed, the fluid force generated between the magnetic head and the magnetic tape can be made uniform, and stable high-quality recording and reproduction can be performed.
【図1】本発明の一実施例を示す図であり、(a)は斜
視図であり、(b)はA−A切断線からみた断面図であ
る。1A and 1B are views showing an embodiment of the present invention, in which FIG. 1A is a perspective view and FIG. 1B is a sectional view taken along the line AA.
【図2】従来の回転ドラムの一例を示す斜視図である。FIG. 2 is a perspective view showing an example of a conventional rotary drum.
13 磁気ヘッド 11 回転部 12 固定部 15 磁気テープ 16 電気機械変換部 17 摺動部 13 magnetic head 11 rotating part 12 fixed part 15 magnetic tape 16 electromechanical conversion part 17 sliding part
Claims (2)
部と、この回転部を回転支持する固定部と、前記回転部
と固定部との境界端面の前記固定部側に設けられて微小
振動する電気機械変換部と、前記回転部の境界端面に圧
接して前記超音波振動を伝達する摺動部とを備えること
を特徴とする回転ドラム。1. A rotary unit, to which a magnetic head is attached and rotates, a fixed unit that rotatably supports the rotary unit, and a fixed end of a boundary end face between the rotary unit and the fixed unit, which is provided with a small vibration. A rotary drum, comprising: an electromechanical conversion unit; and a sliding unit that is in pressure contact with a boundary end surface of the rotating unit to transmit the ultrasonic vibration.
記電気機械変換部は、前記回転部の回転時に超音波振動
し、前記回転部の回転停止時に超音波振動を停止するこ
とを特徴とする回転ドラム。2. The rotary drum according to claim 1, wherein the electromechanical conversion unit vibrates ultrasonically when the rotary unit rotates and stops the ultrasonic vibration when the rotary unit stops rotating. Rotating drum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4115592A JPH05314602A (en) | 1992-05-08 | 1992-05-08 | Rotary drum |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4115592A JPH05314602A (en) | 1992-05-08 | 1992-05-08 | Rotary drum |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05314602A true JPH05314602A (en) | 1993-11-26 |
Family
ID=14666425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4115592A Withdrawn JPH05314602A (en) | 1992-05-08 | 1992-05-08 | Rotary drum |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05314602A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20080006296A (en) * | 2006-07-12 | 2008-01-16 | 씨앤에스 (주) | Ultra sonic generator for roller |
CN100380451C (en) * | 2004-08-04 | 2008-04-09 | 三星电子株式会社 | Head drum assembly having a rotary head drum and a method for processing a rotary drum |
-
1992
- 1992-05-08 JP JP4115592A patent/JPH05314602A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100380451C (en) * | 2004-08-04 | 2008-04-09 | 三星电子株式会社 | Head drum assembly having a rotary head drum and a method for processing a rotary drum |
KR20080006296A (en) * | 2006-07-12 | 2008-01-16 | 씨앤에스 (주) | Ultra sonic generator for roller |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990803 |