JPH0561803U - Signal transmission device in a rotating cylinder having a magnetic head - Google Patents
Signal transmission device in a rotating cylinder having a magnetic headInfo
- Publication number
- JPH0561803U JPH0561803U JP634692U JP634692U JPH0561803U JP H0561803 U JPH0561803 U JP H0561803U JP 634692 U JP634692 U JP 634692U JP 634692 U JP634692 U JP 634692U JP H0561803 U JPH0561803 U JP H0561803U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic head
- rotary cylinder
- signal
- light
- rotating cylinder
- 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
- 230000008054 signal transmission Effects 0.000 title claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims abstract description 7
- 230000003287 optical effect Effects 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 238000004804 winding Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
(57)【要約】
【目的】ビデオテープレコーダやディジタルオーディオ
テープレコーダ等において、磁気ヘッドを有する回転シ
リンダの回転部と静止部との間の信号の減衰を防止する
ことができる信号伝達装置を提供する。
【構成】磁気テープを巻く回転シリンダ１の外周部に磁
気ヘッド２を取付け、磁気ヘッド２により磁気テープに
記録、再生される信号を回転シリンダ１とステータ５と
の間で伝達する。回転シリンダ１の回転中心部と、これ
に軸心方向に対向するステータ５とに、記録、再生信号
の伝達を光信号により行う受発光部３、４を設ける。回
転シリンダ１およびステータ５に、それぞれ受発光部
３、４に光伝達手段８、９を介して接続される記録、再
生信号の光電変換回路６、７を設けた。
(57) [Abstract] [PROBLEMS] To provide a signal transmission device for a video tape recorder, a digital audio tape recorder, etc., capable of preventing signal attenuation between a rotating part and a stationary part of a rotary cylinder having a magnetic head. To do. [Structure] A magnetic head 2 is attached to an outer peripheral portion of a rotary cylinder 1 around which a magnetic tape is wound, and signals recorded and reproduced on the magnetic tape by the magnetic head 2 are transmitted between the rotary cylinder 1 and a stator 5. The rotation center of the rotary cylinder 1 and the stator 5 opposed to the rotation center in the axial direction are provided with light emitting / receiving sections 3 and 4 for transmitting a recording / reproducing signal by an optical signal. The rotary cylinder 1 and the stator 5 are provided with photoelectric conversion circuits 6 and 7 for recording and reproducing signals, which are connected to the light receiving and emitting portions 3 and 4 through the light transmitting means 8 and 9, respectively.
Description
【０００１】[0001]
本考案は、ビデオテープレコーダ（ＶＴＲ）やディジタルオーディオテープレ コーダ（ＤＡＴ）などの磁気ヘッドを有する回転シリンダ（回転ドラムとも称す る）において、回転部と静止部との間の信号の伝達装置に関する。 The present invention relates to a signal transmission device between a rotating part and a stationary part in a rotary cylinder (also referred to as a rotary drum) having a magnetic head such as a video tape recorder (VTR) or a digital audio tape recorder (DAT). .
【０００２】[0002]
ＶＴＲにおいては、磁気テープを回転シリンダの周囲に巻き、磁気テープを回 転シリンダの外周面に接触させて該磁気テープを送りながら該回転シリンダを高 速で回転させ、該回転シリンダの外周に取付けた磁気ヘッドを磁気テープに対し て斜めに走行させ、記録、再生を行う。そして、磁気テープに記録、あるいは再 生される信号を静止部と回転部との間で伝達するため、従来よりロータリートラ ンスが用いられている。このロータリートランスは、前記シリンダと同軸に固定 された円板状ロータの面または円筒状ロータの外周に巻線を設け、一方、静止部 には前記円板状ロータあるいは円筒状ロータの軸心方向または半径方向に対向し て設けられた円板状ステータ、または円筒状ステータには、前記巻線に軸心方向 または半径方向に対向するように巻線を設けて磁気的に結合させ、非接触で信号 の伝達を行うものである。 In a VTR, a magnetic tape is wrapped around a rotating cylinder, the magnetic tape is brought into contact with the outer peripheral surface of the rotating cylinder, the rotating cylinder is rotated at a high speed while feeding the magnetic tape, and the magnetic tape is mounted on the outer periphery of the rotating cylinder. The magnetic head runs diagonally with respect to the magnetic tape for recording and reproduction. Then, in order to transmit the signal recorded or reproduced on the magnetic tape between the stationary part and the rotating part, a rotary transformer has been conventionally used. In this rotary transformer, windings are provided on the surface of a disk-shaped rotor fixed coaxially with the cylinder or on the outer circumference of a cylindrical rotor, while in the stationary part the axial direction of the disk-shaped rotor or cylindrical rotor is provided. Alternatively, for a disk-shaped stator or a cylindrical stator provided facing each other in the radial direction, a winding is provided so as to face the winding in the axial direction or the radial direction, and the windings are magnetically coupled and non-contact. The signal is transmitted by.
【０００３】 しかしこのロータリートランスを用いたシリンダ部における回転部と静止部と の間の信号伝達装置においては、ロータ、ステータ間の空気層を通して非接触の 磁気的結合により信号の伝達を行うため、トランスの結合係数は小さく、また、 巻線間に分布容量が存在するため、高周波の信号は減衰し、信号品質の低下を招 き、ＶＴＲにおいては画質の向上の妨げになるという問題点があった。また、Ｄ ＡＴにおいても同様の問題を発生するという問題点があった。However, in the signal transmission device using the rotary transformer between the rotating portion and the stationary portion in the cylinder portion, signals are transmitted by non-contact magnetic coupling through the air layer between the rotor and the stator. Since the coupling coefficient of the transformer is small and the distributed capacitance exists between the windings, high-frequency signals are attenuated, resulting in deterioration of signal quality, and there is a problem in that improvement of image quality is impeded in VTR. It was Further, there is a problem that the same problem occurs in DAT.
【０００４】 本考案は、上記問題点に鑑み、ＶＴＲやＤＡＴ等において、磁気ヘッドを有す る回転シリンダの回転部と静止部との間の信号の減衰を防止することができる信 号伝達装置を提供することを目的とする。In view of the above problems, the present invention is a signal transmission device capable of preventing signal attenuation between a rotating part and a stationary part of a rotary cylinder having a magnetic head in a VTR, a DAT or the like. The purpose is to provide.
【０００５】[0005]
この目的を達成するため、本考案は、磁気テープを巻く回転シリンダの外周部 に磁気ヘッドを取付け、該磁気ヘッドにより磁気テープに記録、再生される信号 を回転シリンダと静止部との間で伝達する装置において、前記回転シリンダの回 転中心部と、該回転中心部に軸心方向に対向する静止部とに、前記記録、再生信 号の伝達を光信号により行う受発光部を設け、前記回転シリンダおよび前記静止 部に、それぞれ前記受発光部に光伝達手段を介して接続される記録、再生信号の 光電変換回路を設けたことを特徴とする。 To achieve this object, the present invention mounts a magnetic head on the outer circumference of a rotary cylinder around which a magnetic tape is wound, and transmits signals recorded and reproduced by the magnetic head between the rotary cylinder and a stationary part. In the device described above, a light emitting / receiving unit for transmitting the recording / reproducing signal by an optical signal is provided in a rotation center portion of the rotating cylinder and a stationary portion facing the rotation center portion in an axial direction. The rotary cylinder and the stationary portion are each provided with a photoelectric conversion circuit for recording and reproducing signals, which is connected to the light emitting and receiving portion via a light transmitting means.
【０００６】[0006]
本考案は、上述のように、シリンダの固定部と回転部との間で光により信号の 伝達を行うので、この間における高周波信号の減衰の問題は生じない。 According to the present invention, as described above, the signal is transmitted by light between the fixed portion and the rotating portion of the cylinder, so that the problem of attenuation of the high frequency signal does not occur during this period.
【０００７】[0007]
図１は本考案による磁気ヘッドを有する回転シリンダにおける信号伝達装置の 一実施例を示す側面図である。図１において、１は回転シリンダであり、周囲に 複数個の磁気ヘッド２を取付けてなるものである。３は回転シリンダ１の回転中 心部に設けた受発光部、４は回転シリンダ１に対面したステータ５に、前記受発 光部３に対向させて設けた受発光部であり、これらの部分３、４は回転部、静止 部にそれぞれ設けた光電変換回路６、７に例えば光ファイバーのような光伝達手 段８、９により接続される。 FIG. 1 is a side view showing an embodiment of a signal transmission device in a rotary cylinder having a magnetic head according to the present invention. In FIG. 1, reference numeral 1 is a rotary cylinder, which is provided with a plurality of magnetic heads 2 mounted around it. Reference numeral 3 is a light emitting / receiving portion provided in the center of rotation of the rotary cylinder 1, and 4 is a light emitting / receiving portion provided on a stator 5 facing the rotary cylinder 1 so as to face the light receiving / emitting portion 3, and these portions 3 Reference numeral 4 is connected to photoelectric conversion circuits 6 and 7 provided in the rotating portion and the stationary portion, respectively, by optical transmission means 8 and 9 such as optical fibers.
【０００８】 この構成において、磁気テープ（図示せず）に記録された信号の再生を行う場 合は、磁気ヘッド２より電気信号として取り出された再生信号を光電変換回路６ により光信号に変換して光伝達手段８を通して受発光部３に送り、該受発光部３ は発光部として作用し、ここから空気層を通して静止側の受発光部４に送り、該 受発光部４は受光部として作用し、受光された光は、光伝達手段９を通して光電 変換回路７に伝達され、再び電気信号に変換される。記録動作の際には、静止側 の受発光部４が発光部として作用し、回転側の受発光部３が受光部として作用し 、前記の逆の動作を行う。In this configuration, when reproducing a signal recorded on a magnetic tape (not shown), the reproduction signal extracted as an electric signal from the magnetic head 2 is converted into an optical signal by the photoelectric conversion circuit 6. Through the light transmitting means 8 to the light emitting / receiving unit 3, which acts as a light emitting unit, from which it is sent to the stationary light receiving / emitting unit 4 through the air layer, and the light receiving / emitting unit 4 acts as a light receiving unit. Then, the received light is transmitted to the photoelectric conversion circuit 7 through the light transmission means 9 and is converted into an electric signal again. During the recording operation, the stationary light receiving / emitting section 4 functions as a light emitting section, and the rotating side light receiving / emitting section 3 functions as a light receiving section, and the reverse operation is performed.
【０００９】 このように、光によって回転部と静止部との間の信号の伝達を行うことにより 、回転部と静止部との間の空気層を介する高周波信号の伝達も減衰を生じること なく行われ、ＶＴＲにおける画質の低下の問題が解消される。As described above, by transmitting the signal between the rotating portion and the stationary portion by the light, the transmission of the high frequency signal through the air layer between the rotating portion and the stationary portion can be performed without causing any attenuation. That is, the problem of image quality deterioration in the VTR is solved.
【００１０】 なお、上記実施例においては、光伝達手段８、９に受発光部３、４を設けるこ ととしたが、これらの受発光部３、４は、発光部と受光部とをそれぞれ別々に備 え、発光部と受光部にそれぞれ発光用光伝達手段、受光用光伝達手段を接続した ものであっても良い。In the above embodiment, the light transmitting / receiving sections 3 and 4 are provided in the light transmitting means 8 and 9. However, these light receiving / emitting sections 3 and 4 have a light emitting section and a light receiving section, respectively. The light emitting section and the light receiving section may be separately provided, and the light emitting section and the light receiving section are respectively connected to the light emitting section and the light receiving section.
【００１１】[0011]
本考案によれば、ＶＴＲやＤＡＴ等の回転シリンダにおいて、回転部と静止部 との間の空気層を介する信号の伝達を光により行うようにしたので、高周波信号 の減衰の問題が解決され、伝達される信号の品質が高品位に保持される。 According to the present invention, in a rotating cylinder such as a VTR or a DAT, a signal is transmitted by light through an air layer between a rotating part and a stationary part, so that the problem of attenuation of high frequency signals is solved. The quality of the transmitted signal is kept high.
【図１】本考案による信号伝達装置の一実施例を示す側
面図である。FIG. 1 is a side view showing an embodiment of a signal transmission device according to the present invention.
１ 回転シリンダ ２ 磁気ヘッド ３、４ 受発光部 ５ ステータ ６、７ 光電変換回路 ８、９ 光伝達手段 DESCRIPTION OF SYMBOLS 1 rotating cylinder 2 magnetic heads 3 and 4 light receiving and emitting section 5 stators 6 and 7 photoelectric conversion circuit 8 and 9 light transmission means
Claims (1)
磁気ヘッドを取付け、該磁気ヘッドにより磁気テープに
記録、再生される信号を回転シリンダと静止部との間で
伝達する装置において、前記回転シリンダの回転中心部
と、該回転中心部に軸心方向に対向する静止部とに、前
記記録、再生信号の伝達を光信号により行う受発光部を
設け、前記回転シリンダおよび前記静止部に、それぞれ
前記受発光部に光伝達手段を介して接続される記録、再
生信号の光電変換回路を設けたことを特徴とする磁気ヘ
ッドを有する回転シリンダにおける信号伝達装置。1. A device for mounting a magnetic head on an outer peripheral portion of a rotating cylinder around which a magnetic tape is wound, and transmitting a signal recorded / reproduced on / from the magnetic tape by the magnetic head between a rotating cylinder and a stationary portion. A rotation center part of the cylinder and a stationary part opposed to the rotation center part in the axial direction are provided with light receiving and emitting parts for transmitting the recording and reproduction signals by optical signals, and the rotating cylinder and the stationary part, A signal transmission device in a rotary cylinder having a magnetic head, characterized in that a photoelectric conversion circuit for recording and reproducing signals, which is connected to each of the light receiving and emitting parts via a light transmitting means, is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP634692U JPH0561803U (en) | 1992-01-20 | 1992-01-20 | Signal transmission device in a rotating cylinder having a magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP634692U JPH0561803U (en) | 1992-01-20 | 1992-01-20 | Signal transmission device in a rotating cylinder having a magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0561803U true JPH0561803U (en) | 1993-08-13 |
Family
ID=11635820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP634692U Pending JPH0561803U (en) | 1992-01-20 | 1992-01-20 | Signal transmission device in a rotating cylinder having a magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0561803U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041901A (en) * | 1990-04-18 | 1992-01-07 | Nec Corp | Rotary drum device |
-
1992
- 1992-01-20 JP JP634692U patent/JPH0561803U/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH041901A (en) * | 1990-04-18 | 1992-01-07 | Nec Corp | Rotary drum device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19980616 |