JPH0240119A - Rotary head device - Google Patents
Rotary head deviceInfo
- Publication number
- JPH0240119A JPH0240119A JP18849188A JP18849188A JPH0240119A JP H0240119 A JPH0240119 A JP H0240119A JP 18849188 A JP18849188 A JP 18849188A JP 18849188 A JP18849188 A JP 18849188A JP H0240119 A JPH0240119 A JP H0240119A
- Authority
- JP
- Japan
- Prior art keywords
- tape
- running surface
- tape running
- parallel
- video 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.)
- Pending
Links
- 230000010355 oscillation Effects 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 11
- 238000003754 machining Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、ビデオヘッドとビデオテープの衝撃により発
生する騒音、振動を低減する回転ヘッド装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotary head device that reduces noise and vibration caused by impact between a video head and a video tape.
ビデオヘッドとビデオテープとの衝撃を低減する手段と
しては、従来の回転ヘッド装置は、実開昭６１−１１１
０４８号公報に記載のように、テープ走行面に、中央部
からテープ出口部分近傍に突起を設ける方法があり、テ
ープの振動を抑制するとなっている。As a means to reduce the impact between the video head and the video tape, the conventional rotating head device is
As described in Japanese Patent Application No. 048, there is a method of providing a protrusion on the tape running surface from the center to the vicinity of the tape exit portion to suppress vibration of the tape.
上記従来技術は、実際の突部の形成手段には触れておら
ず形成困難である問題があり、又、ヘソドの離脱時のテ
ープ振動抑制効果しかなく、ヘッド突入時に発生する振
動（騒音）の低減効果が無いことに問題があった。The above conventional technology has the problem that it is difficult to form the protrusion because it does not touch on the actual means for forming the protrusion, and it only has the effect of suppressing the tape vibration when the head is removed, which reduces the vibration (noise) generated when the head enters. The problem was that there was no reduction effect.
本発明の目的は、上記した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、テープ走行面にテープガイド部に沿って平
行にわずかの突起を設けることにより達成される。The above object is achieved by providing a slight protrusion on the tape running surface parallel to the tape guide section.
テープ走行面にテープガイド部に沿って平行に設けたわ
ずかな突起によ１バテ一プ入側部のテープをわずかに浮
かせることにより、ビデオヘッドの進入時のテープとの
衝撃を緩和することになるので、テープの振動（騒音）
を低減することができる。By slightly lifting the tape on the entry side of the first batten by a slight protrusion provided parallel to the tape guide section on the tape running surface, the impact with the tape when the video head enters is alleviated. Therefore, the vibration (noise) of the tape
can be reduced.
以下、本発明の一実施例を図を用い説明する。 Hereinafter, one embodiment of the present invention will be described using the drawings.
第１図はシリンダの斜視図であり、第２図は第１図にお
けるＸ−ｘ′断面図である。図において１，４は玉軸受
、２は下シリンダ、３は軸で下シリンダ２に玉軸受１，
４を介し回転自在に支持されており、軸乙の上端部には
ディスク５を嵌合している。FIG. 1 is a perspective view of the cylinder, and FIG. 2 is a sectional view taken along line X-x' in FIG. In the figure, 1 and 4 are ball bearings, 2 is the lower cylinder, 3 is the shaft, and the lower cylinder 2 has ball bearing 1,
4, and a disk 5 is fitted to the upper end of the shaft.
ディスク５には、ビデオヘッド６が固定された上シリン
ダ７が固定され、又ディスク５の他端面にはロータリト
ランス８が接着固定されている。又、軸３の下端部には
、駆動用のロータマグネット９が固定されており、コイ
ルが巻かれたステータ１０により駆動力（回転力）が得
られる。ビデオヘッド６は、上シリンダ７のテープ摺動
面よりわずかに突出させ、磁気テープに接触させること
により記録再生を行なっている。An upper cylinder 7 to which a video head 6 is fixed is fixed to the disk 5, and a rotary transformer 8 is adhesively fixed to the other end surface of the disk 5. Further, a rotor magnet 9 for driving is fixed to the lower end of the shaft 3, and a driving force (rotational force) is obtained by a stator 10 around which a coil is wound. The video head 6 projects slightly from the tape sliding surface of the upper cylinder 7 and performs recording and reproduction by bringing it into contact with the magnetic tape.
第３図に、ビデオヘッド乙によりテープ１３に与える衝
撃の様子を示した。上シリンダ７の回転方向をＦ、テー
プ１６の走行方向なＥとすると、ヘッド６のテープへの
進入側Ｈ部と離脱側Ｇ部に図に示すように振動が発生す
る。本発明によれば、第４図に示す様に、下シリンダ２
のテープ走行面にテープガイド（以下リードと呼ぶ）に
沿って平行にわずかな突起１４を設けることにより、容
易にヘッド乙によりテープの進入側に発生する振動の様
子を分かり易くする為、第５図、第６図、第７図（ａ）
、 （ｂ）のテープ振動の模式図を用い説明する。FIG. 3 shows the impact applied to the tape 13 by the video head B. Assuming that the rotational direction of the upper cylinder 7 is F and the running direction of the tape 16 is E, vibrations are generated at the tape entry side H section and the exit side G section of the head 6 as shown in the figure. According to the present invention, as shown in FIG.
By providing a slight protrusion 14 parallel to the tape guide (hereinafter referred to as lead) on the tape running surface of the fifth head, it is possible to easily see the vibrations generated on the tape entry side by the head. Figure, Figure 6, Figure 7 (a)
This will be explained using the schematic diagram of tape vibration shown in (b).
第５図、第７図（ｂ）は従来の装置におけるヘッド６と
テープ１３のヘッド進入時のテープの振動の様子を示し
た図であり、テープ１６にヘッド６が急激に衝突してい
る為、テープのＨ部に振動が発生する。一方、本発明に
よる装置における、振動の様子を示した図が、第６図、
第７図（ａ）に示しである。図で示す様に、下シリンダ
２のテープ走行面に設けた突起１４により、ヘッド６が
テープに進入する時の衝撃が小さくなり、テープに振動
が発生しなくなる。FIG. 5 and FIG. 7(b) are diagrams showing how the head 6 and tape 13 vibrate when the head enters the tape 13 in a conventional device. , vibration occurs in the H section of the tape. On the other hand, FIG. 6 shows the state of vibration in the device according to the present invention.
This is shown in FIG. 7(a). As shown in the figure, the protrusion 14 provided on the tape running surface of the lower cylinder 2 reduces the impact when the head 6 enters the tape, so that no vibration occurs in the tape.
さらに、テープ走行面のテープ離脱側に、わずかな突起
を設けることにより、テープ０部の振動が低減でき、効
果がさらに大きくなる。Furthermore, by providing a slight protrusion on the tape release side of the tape running surface, the vibration of the tape 0 section can be reduced, further increasing the effect.
本発明による効果の一例を騒音スペクトラムの比較によ
り示す。第９図に、従来実施例と本発明実施例における
騒音の差をスペクトラム表示しであるが、横軸に周波数
（ＫＨｚ ）、縦軸に騒音レベル差（ａＢ）を取っであ
る。図の表示は、従来実施例の騒音から本発明実施例の
騒音を引いである為、ＯｄＢラインより上、すなわちプ
ラスになっている部分が本発明の効果を表わしているこ
とになり、２〜５ＫＨ２付近で効果が大きいことが分か
る。音圧レベルとして約４ ｄＢの効果がある。An example of the effects of the present invention will be shown by comparing noise spectra. FIG. 9 shows a spectrum of the difference in noise between the conventional embodiment and the embodiment of the present invention, with the horizontal axis representing the frequency (KHz) and the vertical axis representing the noise level difference (aB). Since the display in the figure is the noise of the embodiment of the present invention subtracted from the noise of the conventional embodiment, the area above the OdB line, that is, the positive area, represents the effect of the present invention. It can be seen that the effect is large near 5KH2. This has an effect of approximately 4 dB on the sound pressure level.
以下、本発明の加工方法の一実施例について説明する。An embodiment of the processing method of the present invention will be described below.
第１０図（ａ）は、本発明実施例の正面図である。ここ
で、突起１５．１４は形状を強調する為、やや大きめに
書かれている。第１０図（ｂ）はその突起１５．１４を
含む下シリンダ２のＹ−Ｙ′に沿う拡大断面図である。FIG. 10(a) is a front view of an embodiment of the present invention. Here, the protrusions 15 and 14 are drawn slightly larger to emphasize their shape. FIG. 10(b) is an enlarged sectional view along YY' of the lower cylinder 2 including the protrusion 15.14.
下シリンダ２は従来より、外周面１７より内側で、外周
面１７に平行のテープ走行面１６と、該テープ走行面１
６の下端にあってテープ走行面に直角で、外周面１７に
のびる＋７−ド１８を有している。下シリンダ２を切削
する際には、シリンダの外周よりかつ上側からバイトで
切削していってテープ走行面１６を順次シタシリンダの
下側に向けて作り、テープ走行面１６の下端をテープ走
行面１６と直角な面に切削してすド１８としている。本
発明の突起１５．１４は外周の切削加工の際に、切削を
わずかに削り残したものであるから、その突起の端部は
リード１８に沿った平行の形状となる。Conventionally, the lower cylinder 2 has a tape running surface 16 that is inside the outer circumferential surface 17 and parallel to the outer circumferential surface 17, and a tape running surface 16 that is parallel to the outer circumferential surface 17.
It has a +7- door 18 located at the lower end of the tape 6 and extending to the outer circumferential surface 17 at right angles to the tape running surface. When cutting the lower cylinder 2, use a cutting tool to cut from the outer periphery and upper side of the cylinder so that the tape running surface 16 is sequentially directed toward the bottom of the cylinder, and the lower end of the tape running surface 16 is It is cut into a surface perpendicular to the surface 18. Since the protrusions 15 and 14 of the present invention are slightly uncut after cutting the outer periphery, the ends of the protrusions have a parallel shape along the lead 18.
以下、本発明の実施例加工法の一例を図を用い詳しく説
明する。第１１図は、一般に下シリンダ２を加工する際
に用いられている油圧カム倣いカム式す−ド加工型数値
制御施盤の加工部分の概略図である。この様な施盤は例
えば日立精工株式会社製Ｉ）ＰＬ−３で公知である。下
シリンダ２は、その円周突部２ａが主軸１９に固定され
たカム２０に固定されたチャック２１に対してスライド
可能なツメ２２にはさまれて高精度に保持され、主軸１
９の回転方向工と同方向に回転する。Hereinafter, an example of the processing method of the present invention will be explained in detail using the drawings. FIG. 11 is a schematic diagram of a machining section of a hydraulic cam copying cam type numerically controlled machining lathe that is generally used when machining the lower cylinder 2. Such a lathe is known, for example, I) PL-3 manufactured by Hitachi Seiko Co., Ltd. The lower cylinder 2 is held with high precision by having its circumferential protrusion 2a sandwiched between slideable claws 22 with respect to a chuck 21 fixed to a cam 20 fixed to the main shaft 19.
It rotates in the same direction as the rotation direction of 9.
一方カムフォロワ２３は、リードターナ２４に回転自在
に取付けられており、主軸１９の回転に伴い、カム２０
のカム面２０ａに倣い矢印Ｊで示す様に往復運動するこ
と（二より、リードターナ２４にＹ軸制御可能に取付け
られているバイトホルダ２５に取付けられたバイト２６
も、カム２０のカム面２０ａの形状に倣った動きをする
。このカム面２０ａはその形状がシリンダ２のリード１
８の所望の形状になるよう予め設定されている。On the other hand, the cam follower 23 is rotatably attached to the lead turner 24, and as the main shaft 19 rotates, the cam 20
(Secondly, the cutting tool 26 attached to the cutting tool holder 25 which is attached to the lead turner 24 so as to be able to control the Y axis.)
The movement also follows the shape of the cam surface 20a of the cam 20. This cam surface 20a has a shape similar to that of the lead 1 of the cylinder 2.
It is preset to have a desired shape of 8.
本装置を使用し、突部１４，１５を加工する方法につい
て、従来実施例と比軸して説明する。第１２図に従来実
施例を加工する際のバイト２６の制御方法、第１６図に
第１２図の下シリンダ２のＷ−Ｗ′の線に沿う拡大断面
図を示す。バイト２６の切込み量Ｔを第１１図のＸ軸数
値制御系２９により設定し、バイト２６の送り長さＬを
Ｙ軸数値制御系２８により設定する。このことにより、
第１２図のバイト２６は、図示の２６ａの位置から切込
み量Ｔだけシリンダ２の内側に図示の２６ｂ迄移動し、
第１１図のカム２０のカム面２０ａの形状に倣って図１
２の矢印に方向に移動し一周毎に７０ミクロンのピッチ
で矢印Ｍ方向に移動し、速り長さＬ分移動して止まり、
次いで第１１図の他のバイト２７が切削端部を切削加工
して直角な面に仕上げて、テープ走行面１６とり一ド１
８を切削加工することができる。A method of machining the protrusions 14 and 15 using this apparatus will be explained in comparison with the conventional example. FIG. 12 shows a method of controlling the cutting tool 26 when machining a conventional example, and FIG. 16 shows an enlarged sectional view of the lower cylinder 2 in FIG. 12 along the line W-W'. The depth of cut T of the cutting tool 26 is set by the X-axis numerical control system 29 in FIG. 11, and the feed length L of the cutting tool 26 is set by the Y-axis numerical control system 28. Due to this,
The cutting tool 26 in FIG. 12 is moved from the position 26a shown in the figure to the inside of the cylinder 2 by the cutting amount T to the position 26b shown in the figure,
Figure 1 follows the shape of the cam surface 20a of the cam 20 in Figure 11.
It moves in the direction of arrow 2, moves in the direction of arrow M at a pitch of 70 microns every round, moves a speed length L and stops,
Next, the other cutting tool 27 shown in FIG.
8 can be cut.
次に、第１４図に本実施例を加工する際のバイトの制御
方法、第１５図に第１４図の下シリンダ２のｚ−ｚ’の
線に沿う拡大断面図を示す。第１１図のＸ軸数値制御系
２９により突起１５の所定の高さを得る為、シリンダ２
の外周面１７の切込み量Ｔ−ｔ、を設定し、第１１図の
Ｙ動油圧制御系２８によ１バ突起の所定の長さｔ、を加
工制御する。Next, FIG. 14 shows a method of controlling the cutting tool when machining this embodiment, and FIG. 15 shows an enlarged sectional view of the lower cylinder 2 in FIG. 14 along the line zz'. In order to obtain a predetermined height of the protrusion 15 using the X-axis numerical control system 29 shown in FIG.
The depth of cut T-t of the outer circumferential surface 17 is set, and the predetermined length t of the protrusion 1 is controlled by the Y hydraulic pressure control system 28 shown in FIG.
所定の長さｔ、を加工後、さらに、第１１図のＸ軸数値
制御系２９、Ｙ動油圧制御系２８を制御し、テープ走行
面１６を切込みｉ−ｔ、、所定の長さｔ２で切削加工す
る。次に、再度第１１図のＸ軸数値制御系２９、Ｙ動油
圧制御系２８を制御し、突起１４を所定の高さｔ２、所
定の長さｔ３を得ている。After machining the predetermined length t, the X-axis numerical control system 29 and Y hydraulic control system 28 in FIG. 11 are further controlled to cut the tape running surface 16 to a predetermined length t2. Cutting. Next, the X-axis numerical control system 29 and the Y-hydraulic control system 28 shown in FIG. 11 are controlled again to obtain the predetermined height t2 and predetermined length t3 of the protrusion 14.
次いで第１１図の他のバイト２７が切削端部を切削加工
して直角な面に仕上げてリード１８を切削加工すること
ができる。Next, the other cutting tool 27 shown in FIG. 11 cuts the cutting end to make a perpendicular surface, so that the lead 18 can be cut.
この様な加工方法により得られた突起１４．１５の外周
端面の形状は、加工方法で明らかな様に、リード１８と
同一形状となることが特徴である。The shape of the outer peripheral end surface of the protrusion 14, 15 obtained by such a processing method is characterized in that the shape is the same as that of the lead 18, as is clear from the processing method.
又、突起１４．ｉ５のテープ走行面１６からの高さ１２
、１．は、第１１図のＸ軸数値制御系２９により卑独に
かつ任意の値に簡枢に設定できることが特徴である。Also, the protrusion 14. Height 12 from tape running surface 16 of i5
, 1. is characterized in that it can be easily and independently set to any value using the X-axis numerical control system 29 shown in FIG.
同、突起の高さ１２．１１の関係としては、一般に第１
６図で示す様にテープの巻付に伴ないヘッド面圧が増大
していくことからｔ２〈ｔｌが望ましい。Similarly, the relationship between the height of the protrusion 12.11 is generally the first
As shown in FIG. 6, since the head surface pressure increases as the tape is wound, it is desirable that t2<tl.
以上述べた様に、本発明の突起はテープ走行面及びリー
ドを加工する際に、所定のタイミングで切込みを入れる
だけで容易にかつ高精度に設けることができるので、容
易に安定してテープ振動（騒音）を低減できる効果があ
る。As described above, the protrusions of the present invention can be easily and precisely provided by making cuts at predetermined timings when processing the tape running surface and leads, so that tape vibrations can be easily and stably produced. It has the effect of reducing (noise).
第１図は本発明実施例の斜視図、第２図は本発明実施例
の断面図、第３図〜第５図は従来実施例のテープ振動モ
デル、第６図、第８図は本発明実施例のテープ振動モデ
ル、第７図（ａ）は本発明実施例のテープ振動拡大モデ
ル、第７図（ｂ）は従来実施例のテープ振動拡大モデル
、第９図は騒音効果比較スペクトラム、第１０図（ａ）
は本発明実施例の正面図、第１０図（ｂ）は本発明実施
例の断面図、第１１２・・・下シリンダ
６・・・ビデオヘッド
７・・・上シリンダ
１４．１５・・・突起
１６・・・テープ走行面
１８・・・リード。FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a sectional view of an embodiment of the present invention, FIGS. 3 to 5 are tape vibration models of conventional embodiments, and FIGS. 6 and 8 are in accordance with the present invention. The tape vibration model of the embodiment, FIG. 7(a) is the tape vibration enlargement model of the embodiment of the present invention, FIG. 7(b) is the tape vibration enlargement model of the conventional embodiment, and FIG. 9 is the noise effect comparison spectrum. Figure 10(a)
10(b) is a sectional view of the embodiment of the present invention, 112th...Lower cylinder 6...Video head 7...Upper cylinder 14, 15...Protrusion 16...Tape running surface 18...Lead.
Claims (1)
ンダとテープガイド及びテープ走行面を外周に具備した
固定シリンダからなるシリンダにおいて、テープ走行面
にテープガイドに沿って平行に突起Ａを設けた事と特徴
とする回転ヘッド装置。 ２、前記突起Ａは、前記テープ走行面と一体で前記テー
プ走行面と平行な面Ｂを設けた事を特徴とする請求項１
記載の装置。 ３、前記テープ走行面のテープ離脱側に、前記テープガ
イドに平行な端面を有し、かつ、テープ走行面と一体加
工されたわずかな突起Ｃを設けた事を特徴とする請求項
２記載の回転ヘッド装置。 ４、前記突起Ｃに、前記テープ走行面に平行な面Ｄを設
けた事を特徴とする請求項３記載の回転ヘッド装置。 ５、前記面Ｄの前記テープ走行面からの高さは、前記面
Ｂの前記テープ走行面からの高さより大きい事を特徴と
する請求項４記載の回転ヘッド装置。[Claims] 1. In a cylinder consisting of a rotating cylinder equipped with at least one video head, a fixed cylinder equipped with a tape guide and a tape running surface on the outer periphery, a projection A is provided on the tape running surface parallel to the tape guide. A rotating head device characterized by the provision of. 2. Claim 1, wherein the protrusion A is provided with a surface B that is integral with the tape running surface and parallel to the tape running surface.
The device described. 3. The tape according to claim 2, characterized in that a slight protrusion C, which has an end face parallel to the tape guide and is integrally processed with the tape running surface, is provided on the tape release side of the tape running surface. Rotating head device. 4. The rotary head device according to claim 3, wherein the projection C is provided with a surface D parallel to the tape running surface. 5. The rotary head device according to claim 4, wherein the height of the surface D from the tape running surface is greater than the height of the surface B from the tape running surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18849188A JPH0240119A (en) | 1988-07-29 | 1988-07-29 | Rotary head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18849188A JPH0240119A (en) | 1988-07-29 | 1988-07-29 | Rotary head device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0240119A true JPH0240119A (en) | 1990-02-08 |
Family
ID=16224660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18849188A Pending JPH0240119A (en) | 1988-07-29 | 1988-07-29 | Rotary head device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0240119A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5526207A (en) * | 1991-08-07 | 1996-06-11 | Matsushita Electric Industrial Co., Ltd. | Rotary head cylinder having a fixed cylinder projection generating a lifting force at a lower edge of a tape on the cylinder to increase an upper edge restricting force |
-
1988
- 1988-07-29 JP JP18849188A patent/JPH0240119A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5526207A (en) * | 1991-08-07 | 1996-06-11 | Matsushita Electric Industrial Co., Ltd. | Rotary head cylinder having a fixed cylinder projection generating a lifting force at a lower edge of a tape on the cylinder to increase an upper edge restricting force |
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