JPH01124111A - Rotary head assembly for magnetic recording and reproducing device - Google Patents

Rotary head assembly for magnetic recording and reproducing device

Info

Publication number
JPH01124111A
JPH01124111A JP28173487A JP28173487A JPH01124111A JP H01124111 A JPH01124111 A JP H01124111A JP 28173487 A JP28173487 A JP 28173487A JP 28173487 A JP28173487 A JP 28173487A JP H01124111 A JPH01124111 A JP H01124111A
Authority
JP
Japan
Prior art keywords
magnetic
rotary cylinder
magnetic tape
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.)
Pending
Application number
JP28173487A
Other languages
Japanese (ja)
Inventor
Eiji Matsuo
英治 松尾
Hiroshi Kanekawa
金川　裕志
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP28173487A priority Critical patent/JPH01124111A/en
Publication of JPH01124111A publication Critical patent/JPH01124111A/en
Pending legal-status Critical Current

Links

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

PURPOSE:To prevent or suppress abrasion in a rotary cylinder and a magnetic tape, the damage of the magnetic tape, and rotational nonuniformity in the rotary cylinder from occurring by forming a prescribed form of groove at a prescribed part on the outer peripheral plane of the rotary cylinder. CONSTITUTION:The groove 11 inclined from both sides of a magnetic head 7 to the rear side is formed on the outer peripheral plane of the rotary cylinder 3 in a direction advancing from a window 30 side to the rotating locus 10 of the magnetic head in the neighborhood of the rear side of the window for the magnetic head observing from a rotational direction. The groove 11 formed on the outer peripheral plane of the rotary cylinder 3 collects the ambient air to the rotating locus 10, and heightens the floating force of the magnetic tape 1 over the outer peripheral plane of the rotary cylinder. In such a way, it is possible to obtain a rotary head assembly for a magnetic recording and reproducing device in which the magnetic tape 1 is prevented from being brought into contact with the rotary cylinder at the rear side of the magnetic head 7, or in which contact with the rotary cylinder is hard to happen compared with a conventional device.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、ビデオテープレコーダ、デジタルオーディ
オチーブレコーダの如き磁気記録再生装置の回転ヘッド
アセンブリに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotary head assembly for a magnetic recording/reproducing device such as a video tape recorder or a digital audio recorder.

〔従来の技術〕[Conventional technology]

第５図は従来の磁気記録再生装置の回転ヘッドアセンブ
リの縦断面図、第６図は第５図の回転ヘッドアセンブリ
の概略的な斜視図、第７図は磁気ヘッド近傍における磁
気テープの変形を示す図、第８図は第７図の線■−■に
沿った断面図である。FIG. 5 is a longitudinal sectional view of a rotary head assembly of a conventional magnetic recording/reproducing device, FIG. 6 is a schematic perspective view of the rotary head assembly of FIG. 5, and FIG. 7 shows deformation of the magnetic tape near the magnetic head. The figure shown in FIG. 8 is a sectional view taken along the line ■--■ in FIG. 7.

図において、（１）は磁気テープ、（２）は磁気テープ
（１）を螺旋状に案内するリード溝（２０１）を外周面
に有する固定シリンダ、（３）は前記固定シリング（２
）から中心軸（４）およびラジアル流体軸受（５）およ
びスラスト流体軸受（６）を介して回転可能に支持され
た回転シリンダ、（７）は回転シリンダ（３）によって
支持され、磁気テープ（１）に情報を記録再生する磁気
ヘッド、（８）は回転シリンダ（３）を回転駆動するモ
ータであって、（８０１）はその固定子、（８０２）は
回転子である。（９）は記録すべき信号または再生信号
を固定部の信号処理回路と磁気ヘッド（７）との間で無
接触で授受するロータリトランスで、（９０１）はその
固定側ロータリトランス、（９０２）は回転側ロータリ
トランスである。回転シリンダ（３）は磁気ヘッド（７
）のための窓（３０１）を有し、磁気ヘッド（力は窓（
３０１）から磁気テープ（１）に対して突出している。In the figure, (1) is a magnetic tape, (2) is a fixed cylinder that has a lead groove (201) on its outer circumferential surface that spirally guides the magnetic tape (1), and (3) is a fixed cylinder (201) that spirally guides the magnetic tape (1).
) is rotatably supported via a central shaft (4) and radial fluid bearings (5) and thrust fluid bearings (6), (7) is supported by the rotary cylinder (3) and is connected to the magnetic tape (1). ), (8) is a motor that rotationally drives the rotary cylinder (3), (801) is its stator, and (802) is its rotor. (9) is a rotary transformer that transmits and receives signals to be recorded or reproduced signals between the signal processing circuit of the fixed part and the magnetic head (7) without contact; (901) is the rotary transformer on the fixed side; (902) is the rotating side rotary transformer. The rotating cylinder (3) has a magnetic head (7
) and has a window (301) for the magnetic head (the force is
301) and protrudes from the magnetic tape (1).

次に動作について説明する。モ―り（８）によって回転
シリンダ（３）を回転駆動すると磁気ヘッド（７）も中
心軸（４）を中心として回転し、固定シリンダ（２）の
リード溝（２０１）に沿って走行する磁気テープ（１）
に情報を記録し、または磁気テープ（１＞にすでに記録
された情報をピックアップする。Next, the operation will be explained. When the rotary cylinder (3) is rotationally driven by the morley (8), the magnetic head (7) also rotates around the central axis (4), and the magnetic head (7) runs along the lead groove (201) of the fixed cylinder (2). Tape (1)
or pick up information already recorded on a magnetic tape (1).

この間、かかる情報信号はロータリトランス（９）を介
して信号処理回路と磁気ヘッド（７）との間で授受され
る。During this time, such information signals are exchanged between the signal processing circuit and the magnetic head (7) via the rotary transformer (9).

しかして、回転シリンダ（３）は高速回転する（ＶＨ８
方式のビデオテープレコーダでは標準で１８０　Ｏｒ、
ｐ、ｍ　）ので回転シリンダ（３）と磁気テープ（りと
の間に空気膜が形成され、磁気ヘッド（７）はその先端
で磁気テープ（１）と接触しこれを突上げながら情報の
記録再生を行なう。Therefore, the rotating cylinder (3) rotates at high speed (VH8
The standard video tape recorder is 180 Or,
p, m), an air film is formed between the rotating cylinder (3) and the magnetic tape (ri), and the magnetic head (7) contacts the magnetic tape (1) with its tip and records information while pushing it up. Perform playback.

ところで、磁気ヘッド（７）近傍においては磁気テープ
（１）は第７図および第８図に示すように変形する。第
７図では磁気テープ（１）の変形を線（１０１）を用い
て斜視図で示しており、（１０２）は磁気ヘッド（７）
によって突上げられた部分を示している。磁気テープ（
１）は回転シリンダ（３）上ではその回転により形成さ
れる空気膜により回転シリンダ（３）の外周面から浮上
しているが、回転シリンダ（３）の回転方向に見て磁気
ヘッド（７）の後方近傍における磁気テープ（１）の変
形は他の部分と様相が異なる。即ち、前記空気膜を形成
する空気流が回転シリンダ（３）の窓（３０１）の部分
で途切れると共に磁気ヘッド（７）の回転によってその
後方の部分の空気圧が低下し、かつ磁気ヘッド（７）に
よる急激な突上げによる圧力低下があるため、磁気ヘッ
ド（７）の後方の部分では磁気テープ（１）が回転シリ
ンダ（３）から浮上せず、磁気ヘッド（７）の回転軌跡
（回転シリンダ（３）の回転方向に見て磁気ヘッド（７
）に整合した円周方向部分）の中心部付近では第８図に
最も良く示されているように磁気テープ（ｌが回転シリ
ンダ（３）の外周面に接触する。Incidentally, near the magnetic head (7), the magnetic tape (1) deforms as shown in FIGS. 7 and 8. In FIG. 7, the deformation of the magnetic tape (1) is shown in a perspective view using the line (101), and (102) is the magnetic head (7).
It shows the part pushed up by. Magnetic tape(
1) floats above the outer peripheral surface of the rotating cylinder (3) due to the air film formed by the rotation of the rotating cylinder (3), but the magnetic head (7) The deformation of the magnetic tape (1) near the rear of the magnetic tape (1) is different from other parts. That is, the air flow forming the air film is interrupted at the window (301) of the rotating cylinder (3), and the rotation of the magnetic head (7) reduces the air pressure in the rear part, and the magnetic head (7) Because of the pressure drop caused by the sudden thrust upward, the magnetic tape (1) does not float away from the rotating cylinder (3) in the rear part of the magnetic head (7), and the rotation trajectory of the magnetic head (7) (rotating cylinder ( 3) when looking in the direction of rotation of the magnetic head (7).
Near the center of the circumferential portion (aligned with ), the magnetic tape (l) contacts the outer circumferential surface of the rotating cylinder (3), as best shown in FIG.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

従来の磁気記録再生装置の回転ヘッドアセンブリは以上
のように構成され、磁気ヘッド（７）の後方近傍で磁気
テープ（１）が回転シリンダ（３）の外周面に接触する
ため、磁気テープ（１）と回転シリンダ（３）の外周面
との間に摩擦が生じ、回転シリンダ（３）および磁気テ
ープ（１）が摩耗したり、磁気テープ（１１が損傷した
りし、更には回転シリンダ（３）の回転に回転むらが生
じる等の問題点があった。The rotary head assembly of a conventional magnetic recording/reproducing device is constructed as described above, and the magnetic tape (1) comes into contact with the outer peripheral surface of the rotary cylinder (3) near the rear of the magnetic head (7). ) and the outer circumferential surface of the rotating cylinder (3), the rotating cylinder (3) and the magnetic tape (1) may be worn out, the magnetic tape (11) may be damaged, and the rotating cylinder (3) may be damaged. ) had problems such as uneven rotation.

この発明は従来のもののかかる問題点を解決するために
なされたものであって、磁気ヘッドの後方において磁気
テープが回転シリンダに接触しないようにしたあるいは
少なくとも従来のものより接触しに＜＜シた磁気記録再
生装置の回転ヘッドアセンブリを提供することを目的と
するものである。This invention was made in order to solve the problems of the prior art, and is designed to prevent the magnetic tape from coming into contact with the rotating cylinder behind the magnetic head, or at least to make it less likely to come into contact with the rotating cylinder than in the prior art. An object of the present invention is to provide a rotary head assembly for a magnetic recording/reproducing device.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る磁気記録再生装置の回転ヘッドアセンブ
リは、回転シリンダの外周面にその回転方向に見て磁気
ヘッド用の窓の後方近傍に、前記窓側から磁気ヘッドの
回転軌跡へ向けてその両側から後方へ傾斜した溝を形成
したものである。The rotating head assembly of the magnetic recording and reproducing apparatus according to the present invention is provided with a magnetic head on the outer circumferential surface of the rotating cylinder near the rear of a window for the magnetic head when viewed in the rotational direction of the rotating cylinder, from both sides of the window toward the rotation locus of the magnetic head. A groove is formed that slopes backward.

〔作用〕[Effect]

この発明においては、回転シリンダの外周面に形成され
た溝が周囲の空気を磁気ヘッドの回転軌跡の方へ集め、
この部分での磁気テープの回転シリンダ外周面からの浮
上刃を高める。In this invention, a groove formed on the outer peripheral surface of the rotating cylinder collects surrounding air toward the rotation trajectory of the magnetic head.
The floating edge of the magnetic tape from the outer circumferential surface of the rotating cylinder is increased in this part.

〔発明の実施例〕[Embodiments of the invention]

以下、この発明の一実施例を第１図乃至第３図について
説明する。第１図はこの発明の一実施例による回転ヘッ
ドアセンブリの斜視図、第２図は第１図のものの回転シ
リンダの窓近傍の拡大正面図、第３図は第１図の線■−
■に沿った拡大断面図であり、前記従来のものと同一部
分には同一符号を付してその説明は省略する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. FIG. 1 is a perspective view of a rotating head assembly according to an embodiment of the present invention, FIG. 2 is an enlarged front view of the rotary cylinder shown in FIG. 1 near the window, and FIG. 3 is a line drawn along the line
It is an enlarged cross-sectional view taken along line (2), and the same parts as the conventional one are given the same reference numerals, and the explanation thereof will be omitted.

図において、（１０）は磁気ヘッド（７）の回転軌跡で
あり、（１１）は回転シリンダ（３）の外周面にその回
転方向に見て、磁気ヘッド（７）用の窓（３０１）の後
方近傍に形成されたＶ字形（ヘリングボーン形）の溝で
あって、この実施例では四つのＶ字形の溝（１１）が形
成されている。In the figure, (10) is the rotation locus of the magnetic head (7), and (11) is the window (301) for the magnetic head (7) on the outer peripheral surface of the rotating cylinder (3) when viewed in the rotation direction. A V-shaped (herringbone-shaped) groove is formed near the rear, and in this embodiment, four V-shaped grooves (11) are formed.

各Ｖ字形溝（１１）は前記窓（３０１）側から前記回転
軌跡（１０）へ向けてその両側から後方へ傾斜した溝（
１１１）、（１１２）からなっている。即ち、溝（１１
１）は前記回転軌跡（１０）の上側に形成されて前記窓
（３０１）側から回転軌跡（１０）へ向けて後方へ傾斜
している。また、溝（１１２）は回転軌跡（１０）の下
側に形成されて窓（３０１）側から回転軌跡（１０）へ
向けて後方へ傾斜している。そして、溝（１１１）、（
１１２）の合流点（１１３）は磁気テープ（１）が回転
シリンダ（３）の外周面と最も接触しやすい前記回転軌
跡（１０）上にほぼ位置している。Each V-shaped groove (11) is a groove (
111) and (112). That is, the groove (11
1) is formed above the rotation locus (10) and is inclined rearward from the window (301) side toward the rotation locus (10). Further, the groove (112) is formed on the lower side of the rotation locus (10) and is inclined rearward from the window (301) side toward the rotation locus (10). And the groove (111), (
The merging point (113) of the magnetic tape (112) is located approximately on the rotation trajectory (10) where the magnetic tape (1) is most likely to come into contact with the outer peripheral surface of the rotation cylinder (3).

かくして回転シリンダ（３）が回転すると、谷溝（１１
）の周囲の空気はこの溝（１１）によって前記回転軌跡
（１０）へ向けて集められ、第３図に矢印で示すように
磁気テープ（１）の下に流入して、磁気テープ（１）を
従来のものにおける仮想線で示す位置から実線で示す位
置へ浮上させ、磁気テープ（１）と回転シリンダ（３）
の外周面との接触を防止し、あるいは少なくとも従来の
ものより回転シリンダ（３）の外周面と接触しにくくす
る。Thus, when the rotating cylinder (3) rotates, the valley groove (11
) is collected toward the rotation locus (10) by this groove (11), flows under the magnetic tape (1) as shown by the arrow in FIG. The magnetic tape (1) and rotating cylinder (3) are levitated from the position shown by the imaginary line in the conventional model to the position shown by the solid line.
or at least make contact with the outer circumferential surface of the rotary cylinder (3) more difficult than in the prior art.

従って、かかる接触が原因となる磁気テープ（１）と回
転シリンダ（３）外周面の摩耗や磁気テープ（１１の損
傷および回転シリンダ（３）の回転むらが防止乃至抑制
される。Therefore, wear on the outer peripheral surfaces of the magnetic tape (1) and the rotating cylinder (3), damage to the magnetic tape (11), and uneven rotation of the rotating cylinder (3) caused by such contact are prevented or suppressed.

この発明の他の実施例における回転シリンダ（３）の窓
（３０１）近傍の正面図が第４図に示されている。図に
おいて、（ＩＩＡ）は従来のものの（１１）、（ＩＩＩ
Ａ）は（１１１）、（１１２Ａ）は（１１２）にそれぞ
れ対応する溝であって、この実施例が先の実施例と異な
るのは、溝（ＩＩＩＡ）、（１１２Ａ）が合流せず、そ
れぞれ独立して形成されている点および千鳥状に配列さ
れている点である。これらの溝（ＩＩＩＡ）、（１１２
Ａ）は第４図に仮想線で示すように磁気ヘッド（７）の
回転軌跡（１ｏ）に対して上下対称に設けても良い。い
ずれの場　４今にも、改めて説明するまでもなく、先の
実施例と同様の効果が得られる。A front view of the vicinity of the window (301) of the rotary cylinder (3) in another embodiment of the present invention is shown in FIG. In the figure, (IIA) is the conventional one (11), (III
A) is a groove corresponding to (111) and (112A) is a groove corresponding to (112), respectively. The difference between this example and the previous example is that grooves (IIIA) and (112A) do not merge, and each groove is different from the previous example. These are points that are formed independently and points that are arranged in a staggered manner. These grooves (IIIA), (112
A) may be provided vertically symmetrically with respect to the rotation locus (1o) of the magnetic head (7), as shown by the imaginary line in FIG. In any case, the same effects as in the previous embodiment can be obtained without further explanation.

なお、溝（１１）、（ＩＩＡ）の数は図示の特定の数に
限られるものではなく、他の任意の数にすることができ
るし、谷溝（１１１）。Note that the number of grooves (11) and (IIA) is not limited to the specific number shown in the drawings, and can be any other number.

（１１２）、（ＩＩＩＡ）、（１１２Ａ）の形状も図示
の直線状のものに限らず、曲線形状、屈曲形状のもので
あっても良く、要するに、磁気ヘッド（７）の回転軌跡
（１０）近傍に空気を集めることのできる形状であれば
良い。The shapes of (112), (IIIA), and (112A) are not limited to the linear shapes shown in the drawings, but may also be curved or bent shapes.In short, the rotation locus (10) of the magnetic head (7) Any shape is sufficient as long as it can collect air nearby.

〔発明の効果〕〔Effect of the invention〕

以上のように、この発明によれば、回転シリンダの外周
面の所定の部分に所定の形態の溝を形成するという極め
て簡単な構成により、磁気テープが回転シリンダの外周
面に接触するのを防止乃至抑制し、回転シリンダおよび
磁気テープの摩耗、磁気テープの破損および回転シリン
ダの回転むらを防止乃至抑制しうる効果が得られる。As described above, according to the present invention, the magnetic tape is prevented from coming into contact with the outer circumferential surface of the rotary cylinder by an extremely simple structure in which a groove of a predetermined shape is formed in a predetermined portion of the outer circumferential surface of the rotary cylinder. This provides the effect of preventing or suppressing wear of the rotating cylinder and magnetic tape, damage to the magnetic tape, and uneven rotation of the rotating cylinder.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図はこの発明の一実施例による磁気記録再生装置の
回転ヘッドアセンブリの斜視図、第２図は第１図のもの
における回転シリンダの磁気ヘッド用窓近傍の正面図、
第３図は第１図の線１１−１に沿った拡大断面図、第４
図はこの発明の他の実施例による回転ヘッドアセンブリ
の磁気ヘッド用窓近傍の正面図、第５図は従来の回転ヘ
ッドアセンブリの軸方向縦断面図、第６図は第５図の回
転ヘッドアセンブリの斜視図、第７図は第６図のものに
おける磁気ヘッド近傍の磁気テープの変形を示す斜視図
、第８図は第７図の線■−■に沿った拡大断面図である
。 図において、（１）は磁気テープ、（２）は固定シリン
ダ、（２０１）はリード溝、（３）は回転シリンダ、（
力は磁気ヘッド、（１０）は磁気ヘッド（７）の回転軌
跡、（１１）ｓ（ＩＩＡ）＊（１１１）＊（１１２）、
（ＩＩＩＡ）、（１１２Ａ）はそれぞれ溝である。 なお、各図中同一符号は同一部または相当部を示す。 代理人　弁理士　　大　　岩　　増　　雄第１図 第２図 第３図 第４図 第５図FIG. 1 is a perspective view of a rotary head assembly of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is a front view of the rotary cylinder in the vicinity of the magnetic head window in FIG. 1.
Figure 3 is an enlarged cross-sectional view taken along line 11-1 in Figure 1;
The figure is a front view of the vicinity of the magnetic head window of a rotating head assembly according to another embodiment of the present invention, FIG. 5 is an axial longitudinal cross-sectional view of a conventional rotating head assembly, and FIG. 6 is the rotating head assembly of FIG. 5. 7 is a perspective view showing deformation of the magnetic tape in the vicinity of the magnetic head in the one shown in FIG. 6, and FIG. 8 is an enlarged sectional view taken along line 1--2 in FIG. 7. In the figure, (1) is a magnetic tape, (2) is a fixed cylinder, (201) is a lead groove, (3) is a rotating cylinder, (
The force is the magnetic head, (10) is the rotation trajectory of the magnetic head (7), (11) s (IIA) * (111) * (112),
(IIIA) and (112A) are grooves, respectively. Note that the same reference numerals in each figure indicate the same or equivalent parts. Agent: Masuo Oiwa, Patent Attorney Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (3)

【特許請求の範囲】[Claims] （１）磁気テープの走行を案内するリード溝を外周面に
有する固定シリンダ、この固定シリンダから回転可能に
支持され、前記磁気テープに情報を記録再生する磁気ヘ
ッドを支持する回転シリンダを備え、前記回転シリンダ
がその外周面から前記磁気ヘッドを前記磁気テープに対
して突出させる窓を有する磁気記録再生装置の回転ヘッ
ドアセンブリにおいて、前記回転シリンダの外周面にそ
の回転方向に見て前記窓の後方近傍に、前記窓側から前
記磁気ヘッドの回転軌跡へ向けてその両側から後方へ傾
斜した溝を形成したことを特徴とする磁気記録再生装置
の回転ヘッドアセンブリ。(1) A fixed cylinder having a lead groove on its outer circumferential surface for guiding the running of the magnetic tape, a rotary cylinder rotatably supported from the fixed cylinder and supporting a magnetic head for recording and reproducing information on the magnetic tape; In a rotary head assembly of a magnetic recording/reproducing device in which a rotary cylinder has a window for protruding the magnetic head toward the magnetic tape from an outer circumferential surface of the rotary cylinder, the outer circumferential surface of the rotary cylinder is provided near the rear of the window when viewed in the direction of rotation of the rotary cylinder. A rotary head assembly for a magnetic recording/reproducing device, characterized in that a groove is formed that slopes backward from both sides toward the rotation locus of the magnetic head from the window side. （２）溝が、合流点がほぼ磁気ヘッドの回転軌跡上に位
置するＶ字形に形成されていることを特徴とする特許請
求の範囲第１項記載の磁気記録再生装置の回転ヘッドア
センブリ。(2) A rotary head assembly for a magnetic recording/reproducing device according to claim 1, wherein the groove is formed in a V-shape with a confluence point located approximately on the rotation locus of the magnetic head. （３）溝が、磁気ヘッドの回転軌跡に対して千鳥状に形
成されていることを特徴とする特許請求の範囲第１項記
載の磁気記録再生装置の回転ヘッドアセンブリ。(3) A rotary head assembly for a magnetic recording/reproducing device according to claim 1, wherein the grooves are formed in a staggered manner with respect to the rotation locus of the magnetic head.
JP28173487A 1987-11-07 1987-11-07 Rotary head assembly for magnetic recording and reproducing device Pending JPH01124111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28173487A JPH01124111A (en) 1987-11-07 1987-11-07 Rotary head assembly for magnetic recording and reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28173487A JPH01124111A (en) 1987-11-07 1987-11-07 Rotary head assembly for magnetic recording and reproducing device

Publications (1)

Publication Number Publication Date
JPH01124111A true JPH01124111A (en) 1989-05-17

Family

ID=17643241

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28173487A Pending JPH01124111A (en) 1987-11-07 1987-11-07 Rotary head assembly for magnetic recording and reproducing device

Country Status (1)

Country Link
JP (1) JPH01124111A (en)

Similar Documents

Publication Publication Date Title
JPH0243263B2 (en)
EP0463750A1 (en) Rotary magnetic head drums
US6362932B1 (en) Disk drive spindle air bearing with features to improve start-stop performance
US6435721B1 (en) Spindle motor unit having hydrodynamic bearing
US5008769A (en) Rotary head type magnetic recording/reproducing device
JPH0214455A (en) Rotary head assembly for magnetic recording and reproducing device
JPH0281311A (en) Rotary head assembly of magnetic recording and reproducing device
WO1998026414A1 (en) Bearing for pinch roller and pinch roller using the bearing
US4262316A (en) Record storage apparatus
JP3819472B2 (en) Thrust dynamic pressure bearing
US5774307A (en) Head drum assembly designed to prevent a magnetic tape from adhering to a drum surface
JP3508318B2 (en) Dynamic pressure type fluid bearing device
JPH01155511A (en) Rotary head assembly in magnetic recording and reproducing device
US6457867B1 (en) Method and apparatus for replenishing oil in a fluid dynamic bearing using a sleeve groove
JP2796192B2 (en) Head drum device for magnetic recording / reproducing device
JP2641658B2 (en) Rotating head assembly
JPH01135912A (en) Magnetic record play back device
JPH0449164B2 (en)
JPS61236068A (en) magnetic disk device
JPH0529962B2 (en)
JPH02183456A (en) Rotary head assembly of magnetic recording and reproducing device
KR200194911Y1 (en) Rotary cylinder apparatus for magnetic recording/reproducing player
JP2604420Y2 (en) Rotating head drum
JP3106539B2 (en) Rotating head drum device
KR200142934Y1 (en) Pinch roller assembly