JPH01137423A - Rotary magnetic recording and reproducing device - Google Patents
Rotary magnetic recording and reproducing deviceInfo
- Publication number
- JPH01137423A JPH01137423A JP29520887A JP29520887A JPH01137423A JP H01137423 A JPH01137423 A JP H01137423A JP 29520887 A JP29520887 A JP 29520887A JP 29520887 A JP29520887 A JP 29520887A JP H01137423 A JPH01137423 A JP H01137423A
- Authority
- JP
- Japan
- Prior art keywords
- oscillation system
- natural frequency
- inner wheel
- rotating drum
- viscoelastic body
- 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
- 230000010355 oscillation Effects 0.000 abstract 10
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/60—Guiding record carrier
- G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/02—Cabinets; Cases; Stands; Disposition of apparatus therein or thereon
- G11B33/08—Insulation or absorption of undesired vibrations or sounds
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はＶＴＲのシリンダ構造に関するもので、シリン
ダの振動の抑制に好適な吸振構造に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cylinder structure for a VTR, and more particularly to a vibration absorbing structure suitable for suppressing cylinder vibration.
従来の装置は、実開昭５８−１０１５１９号公報に記載
のように、慣性体とインナーホイールに双方に透孔を設
は締結して弾性部のパスを長くし吸振効果を向上させる
となっていた。In the conventional device, as described in Japanese Utility Model Application No. 101519/1980, through holes are formed in both the inertial body and the inner wheel, which are then fastened together to lengthen the path of the elastic part and improve the vibration absorption effect. Ta.
上記従来技術は、個々のシリンダに対する吸振特性の最
適化については配慮されておらず、個々のシリンダのば
らつきに対する効果に問題がありた。The above-mentioned conventional technology does not take into consideration the optimization of vibration absorption characteristics for each cylinder, and has a problem in its effectiveness against variations in individual cylinders.
本発明の目的は、上記問題点を排除することにある。An object of the present invention is to eliminate the above-mentioned problems.
上記目的は、慣性体とインナーホイール間に介している
粘弾性体を、慣性体とインナーホイール間をネジ締結し
、締付トルクを可変することにより、圧縮又は膨張させ
ることによりみかけの剛性を謂整することにより達成さ
れる。The above purpose is to reduce the apparent rigidity by compressing or expanding the viscoelastic body interposed between the inertial body and the inner wheel by tightening screws between the inertial body and the inner wheel and varying the tightening torque. This is achieved by adjusting the
インナーホイール、粘弾性体及び慣性体で一つの副振動
系を成している。又、回転ドラム、シャフト、及びモー
タロータで主振動系を構成している。一般的に主振動系
の振動を吸振させる為に、副振動系の固有振動数を主振
動系の固有振動数に一致させることにより行なわれてい
る。慣性体とインナーホイールを締結するネジの締付ト
ルクを変えると、粘弾性体の体積も変わることになる。The inner wheel, viscoelastic body, and inertial body form one sub-vibration system. The main vibration system is composed of a rotating drum, a shaft, and a motor rotor. Generally, in order to absorb the vibrations of the main vibration system, this is done by matching the natural frequency of the sub-vibration system to the natural frequency of the main vibration system. If you change the tightening torque of the screw that fastens the inertial body and the inner wheel, the volume of the viscoelastic body will also change.
それによって、粘弾性体のみかけの剛性が変わり、副振
動系の固有振動数を調整できる。すなわち、ネジ締めの
トルクを調整することにより、容易に主振動系の固有振
動数と副振動系の固有振動数を一致させることができる
。As a result, the apparent stiffness of the viscoelastic body changes, and the natural frequency of the sub-oscillation system can be adjusted. That is, by adjusting the screw tightening torque, the natural frequency of the main vibration system and the natural frequency of the sub-vibration system can be easily matched.
以下、本発明の実施例を図面を用いて説明する。、第１
図及び第２図に回転磁気記録再生装＆（以下シリンダと
呼ぶ）の−例を示し、第１図は本発明実施例の断面図、
第２図は従来実施例の断面図である。同図において１は
回転ドラムであり、該ドラムにはビデオヘッド２が取付
けられている。この回転ドラム１は、シャフト５の上部
に嵌合同着されたディスク４の上面に固定されている。Embodiments of the present invention will be described below with reference to the drawings. , 1st
2 and 2 show an example of a rotating magnetic recording/reproducing device & (hereinafter referred to as a cylinder), and FIG. 1 is a sectional view of an embodiment of the present invention.
FIG. 2 is a sectional view of a conventional embodiment. In the figure, 1 is a rotating drum, and a video head 2 is attached to the drum. This rotating drum 1 is fixed to the upper surface of a disk 4 which is fitted onto the upper part of a shaft 5.
シャフト６は玉軸受５．６を介し固定ドラム７に回転自
在に支持され、回転ドラム１を回転できるようにしであ
る。また、ディスク４０丁部ニは、ビデオヘッド２を信
号処理部（図示せず）とｔｆｉ的に結合させるためのロ
ータリトランス８が接着固定されている。シャフトの下
部には、回転ドラム１を回転駆動するためのモータを構
成するモータｅｔ −タ９が固定されており、このモー
タロータ９に対向するように、コイル１０を備えたステ
ータ１１が固定ドラム７ｖｃ固定されている。The shaft 6 is rotatably supported by a fixed drum 7 via a ball bearing 5.6, so that the rotary drum 1 can be rotated. Further, a rotary transformer 8 for coupling the video head 2 to a signal processing section (not shown) in a TFI manner is adhesively fixed to the disk 40 part D. A motor 9 constituting a motor for rotationally driving the rotary drum 1 is fixed to the lower part of the shaft, and a stator 11 equipped with a coil 10 is connected to the fixed drum 7vc so as to face the motor rotor 9. Fixed.
また、回転ドラム１の上ＷＪＶｃは、インナーホイール
１５が同定ネジ１６ｖｃより固定されている。またイン
ナーホイールには、粘弾性体１４を介し慣性体１５がネ
ジ１２により固定されている。以下、インナーホイール
１人ネジ１２．粘弾性体１ζ慣性体１５で構成されたア
センブリをダンパーと呼ぶ。Further, the inner wheel 15 is fixed to the upper WJVc of the rotating drum 1 by an identification screw 16vc. Further, an inertial body 15 is fixed to the inner wheel with a screw 12 via a viscoelastic body 14 . Below is the inner wheel 1 screw 12. The assembly composed of the viscoelastic body 1ζ and the inertial body 15 is called a damper.
ダンパーの詳細断面を第６図に示し、斜視図を第４図を
示す。A detailed cross section of the damper is shown in FIG. 6, and a perspective view is shown in FIG. 4.
本発明のダンパーの効果を第５図により説明する。横軸
に撮動数、縦軸に主撮動系の振動レベルを示す。従来シ
リンダの場合、実線（−）で示すように、１０００８Ｊ
近傍で鋭いＱ値を示し、回転成分の高調波と重なった場
合、共振現象を起こしジッターの劣化を生ずる。本発明
のダンパーによれば、ネジ１２によりダンパーの固有振
動数を調整することにより、（ｂ）から＜ｃ＞と最適に
特性にすることができ、吸振効果を効率の良いものにす
ることができる。The effects of the damper of the present invention will be explained with reference to FIG. The horizontal axis shows the number of shots, and the vertical axis shows the vibration level of the main camera system. In the case of the conventional cylinder, as shown by the solid line (-), 10008J
It exhibits a sharp Q value in the vicinity, and when it overlaps with the harmonics of the rotational component, a resonance phenomenon occurs and jitter deterioration occurs. According to the damper of the present invention, by adjusting the natural frequency of the damper with the screw 12, the characteristics can be optimized from (b) to <c>, and the vibration absorption effect can be made efficient. can.
本発明によれば、副振動系の固有振動数をネジの給付に
より容易に調整でき、ばらつきをもつシリンダの個々に
対しても最適な吸振特性を持たせることができる。According to the present invention, the natural frequency of the auxiliary vibration system can be easily adjusted by adjusting screws, and even individual cylinders having variations can be provided with optimal vibration absorption characteristics.
第１図は本発明の一実施例のシリンダの断面図、第２図
は従来のシリンダの断面図、＠５図は一実施例のダンパ
ーの断面図、第４図はダンパーの斜視図、第５図は振動
特性図である。
１・・・回転ドラム、２・・・ヘッド、５・・・シャフ
ト、４・・・ディスク、５・・・軸受、６・・・軸受、
７固定ドラム、８・・・ロータリトランス、９・・・モ
ータロータ、１０・・・コイル、１１・・・ステータ、
１２・・・ネジ、１６・・・インナーホイール、１４−
・・粘弾性体、１５・・・慣性体、１６・・・固定ネジ
。
７・“
代理人弁理士 小 川 勝 男゛
第１ 圀
／′。
捲２目
あ〕必
第４１Fig. 1 is a sectional view of a cylinder according to an embodiment of the present invention, Fig. 2 is a sectional view of a conventional cylinder, Fig. 5 is a sectional view of a damper of an embodiment, Fig. 4 is a perspective view of the damper, Figure 5 is a vibration characteristic diagram. DESCRIPTION OF SYMBOLS 1...Rotating drum, 2...Head, 5...Shaft, 4...Disc, 5...Bearing, 6...Bearing,
7 fixed drum, 8... rotary transformer, 9... motor rotor, 10... coil, 11... stator,
12...screw, 16...inner wheel, 14-
...Viscoelastic body, 15...Inertial body, 16...Fixing screw. 7. “Representative Patent Attorney Katsutoshi Ogawa゛1st Country/’. Turn 2nd page, Must be No.41
Claims (1)
ドラムと、該回転ドラムに締結されてこれと一体に回転
するシャフトと、該シャフトにモータロータが締結され
て、上記回転ドラム又は上記モータロータの近傍におい
て、該回転ドラム又は該モータロータに粘弾性体を介し
て、慣性体を取付けて成るシリンダにおいて、該慣性体
と上記回転ドラム又は上記モータロータをネジにより締
結したことを特徴とする回転磁気記録再生装置。1. A rotating drum to which at least one video head is attached, a shaft fastened to the rotating drum and rotating integrally therewith, and a motor rotor fastened to the shaft, in the vicinity of the rotating drum or the motor rotor. A rotating magnetic recording and reproducing device characterized in that, in a cylinder, an inertial body is attached to the rotating drum or the motor rotor via a viscoelastic body, and the inertial body and the rotating drum or the motor rotor are fastened with screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29520887A JPH01137423A (en) | 1987-11-25 | 1987-11-25 | Rotary magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29520887A JPH01137423A (en) | 1987-11-25 | 1987-11-25 | Rotary magnetic recording and reproducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01137423A true JPH01137423A (en) | 1989-05-30 |
Family
ID=17817604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29520887A Pending JPH01137423A (en) | 1987-11-25 | 1987-11-25 | Rotary magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01137423A (en) |
-
1987
- 1987-11-25 JP JP29520887A patent/JPH01137423A/en active Pending
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