JPH0728569Y2 - Centrifugal magnetic head device - Google Patents
Centrifugal magnetic head deviceInfo
- Publication number
- JPH0728569Y2 JPH0728569Y2 JP5522188U JP5522188U JPH0728569Y2 JP H0728569 Y2 JPH0728569 Y2 JP H0728569Y2 JP 5522188 U JP5522188 U JP 5522188U JP 5522188 U JP5522188 U JP 5522188U JP H0728569 Y2 JPH0728569 Y2 JP H0728569Y2
- Authority
- JP
- Japan
- Prior art keywords
- head chip
- substrate
- rotary drum
- magnetic tape
- spring
- 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.)
- Expired - Lifetime
Links
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、ばね、例えば２枚の平行板ばねを用いた遠心
力型磁気ヘッド装置に係り、特に回転ドラム式の8mmビ
デオやR-DAT用として最適な磁気ヘッド装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a centrifugal force type magnetic head device using a spring, for example, two parallel leaf springs, and in particular, a rotary drum type 8 mm video and R-DAT. The present invention relates to a magnetic head device most suitable for use.
第１の基板が第１のばねにより回転ドラムに装着され、
ヘッドチップを有する第２の基板が第２のばねにより第
１の基板に装着されてなる遠心力磁気ヘッド装置におい
て、前記回転ドラムの回転による遠心力により、前記第
１のばねに抗して前記第１の基板を前記ヘッドチップ突
出方向に微動させ、前記第２のばねに抗して前記第２の
基板を前記ヘッドチップ突出方向に微動されることによ
り、停止時に前記ヘッドチップが前記回転ドラム外周よ
り突出することなく、前記ヘッドチップの欠けや磁気テ
ープの傷の発生を防止する。The first substrate is attached to the rotating drum by the first spring,
In a centrifugal magnetic head device in which a second substrate having a head chip is mounted on the first substrate by a second spring, the centrifugal force generated by the rotation of the rotating drum resists the first spring and By finely moving the first substrate in the head chip projecting direction and slightly moving the second substrate in the head chip projecting direction against the second spring, the head chip is stopped when the rotary drum is stopped. The protrusion of the head chip and the damage of the magnetic tape are prevented without protruding from the outer periphery.
〔従来の技術〕 第３図（Ａ）、（Ｂ）は本出願人が出願し公開された実
開昭57-87338に開示される従来の遠心力型磁気ヘッド装
置を説明するための平面図および要部断面図である。こ
れらの図において、第１の基板51は回転ドラム（図示し
ていない）に取付けられ、Ｉ形部材52とこれと直交する
２本の平行部材53、54とにより一体に構成されている。
ばね３、４は、例えば２枚の平行板ばねであって、この
ばね３、４の一端が前記Ｉ形部材52に形成された溝に入
り、前記平行部材54を挟むように適宜手段で固着され
る。そして、このばね３、４の各他端には、第２の基板
２が固着される。この第２の基板２の先端には、ヘッド
チップ５が取付けられる。且つ、前記回転ドラムの停止
時には、前記ばね３、４は、前記平行部材54との間に間
隔l3、l4があくように取付けられる。ブチルゴムなどよ
りなるダンパー６は、Ｌ字形の形状をしており，このダ
ンパー６の一端は、前記平行部材54に固着され、他端は
前記第２の基板２に固着される。このように組立られた
第１の基板51は、取付孔60、61、62を介してビスにより
前記回転ドラムに取付けられ従来の遠心力型磁気ヘッド
装置を構成する。[Prior Art] FIGS. 3 (A) and 3 (B) are plan views for explaining a conventional centrifugal force type magnetic head device disclosed in Japanese Utility Model Application Laid-Open No. 57-87338 filed and filed by the present applicant. FIG. 3 is a sectional view of a main part. In these figures, the first substrate 51 is attached to a rotary drum (not shown), and is integrally formed by an I-shaped member 52 and two parallel members 53 and 54 orthogonal to the I-shaped member 52.
The springs 3 and 4 are, for example, two parallel plate springs, and one end of the springs 3 and 4 enters a groove formed in the I-shaped member 52 and is fixed by appropriate means so as to sandwich the parallel member 54. To be done. Then, the second substrate 2 is fixed to the other ends of the springs 3 and 4, respectively. A head chip 5 is attached to the tip of the second substrate 2. In addition, when the rotary drum is stopped, the springs 3 and 4 are mounted so that there are gaps l 3 and l 4 between the springs 3 and 4 and the parallel member 54. The damper 6 made of butyl rubber or the like has an L shape, and one end of the damper 6 is fixed to the parallel member 54 and the other end is fixed to the second substrate 2. The first substrate 51 thus assembled is attached to the rotary drum with screws through the attachment holes 60, 61, and 62, and constitutes a conventional centrifugal magnetic head device.
次に、このような遠心力型磁気ヘッド装置の動作を説明
する。前記回転ドラムが停止している状態では、第３図
（Ａ）、（Ｂ）に示す位置に前記ヘッドチップ５がある
が、前記回転ドラムの回転により、遠心力が働くと、矢
印Ａ方向、即ち前記回転ドラムの外周方向に前記ヘッド
チップ５は移動し、磁気テープ９に接触し、記録・再生
を行う。この場合、遠心力の大きさは可動部（前記ヘッ
ドチップ５が固着された第２の基板２）の等価質量およ
び等価半径に比例し且つ回転数の２乗に比例する。例え
ばβ方式のビデオテープレコーダーの回転ドラムの場
合、ドラム径が74.5mm、そしてドラム回転数が1800r.p.
mで、約10gr-fの遠心力が発生し、前記ヘッドチップ５
は60μｍ以上矢印Ａ方向に移動する。しかし、前記磁気
テープ９がこのヘッドチップ５に接触しているため、前
記磁気テープ９の押圧力により前記ヘッドチップ５の前
記回転ドラム外周からの突出量は約45μｍとなり、前記
ヘッドチップ５と前記磁気テープ９との押圧力は約2.5g
r-fとなる。Next, the operation of such a centrifugal force type magnetic head device will be described. In the state where the rotary drum is stopped, the head chip 5 is located at the position shown in FIGS. 3A and 3B, but when centrifugal force is exerted by the rotation of the rotary drum, an arrow A direction, That is, the head chip 5 moves in the outer peripheral direction of the rotary drum, contacts the magnetic tape 9, and performs recording / reproduction. In this case, the magnitude of the centrifugal force is proportional to the equivalent mass and the equivalent radius of the movable part (the second substrate 2 to which the head chip 5 is fixed) and the square of the rotation speed. For example, in the case of the rotating drum of a β-type video tape recorder, the drum diameter is 74.5 mm and the drum rotation speed is 1800 r.p.
At m, a centrifugal force of about 10 gr-f is generated, and the head chip 5
Moves in the direction of arrow A over 60 μm. However, since the magnetic tape 9 is in contact with the head chip 5, the protrusion amount of the head chip 5 from the outer circumference of the rotary drum is about 45 μm due to the pressing force of the magnetic tape 9, and the head chip 5 and the Pressing force with magnetic tape 9 is about 2.5g
It becomes rf.
次に、異常のとき、前記ヘッドチップ５が遠心力により
飛び出そうとしても前記ばね３、４の一方のばね４が前
記平行部材54に当接して間隔l4が０になり、前記平行部
材54がストッパーの役目をすることで、破損から保護す
る。また、前記ヘッドチップ５をクリーニングするとき
には、逆に矢印Ｂ方向、即ち前記回転ドラムの中心方向
に異常力が加わることがあるが、このときは前記ばね
３、４の一方のばね３が前記平行部材54に当接して間隔
l3が０となり、やはり破損から保護する。Next, when an abnormality occurs, even if the head chip 5 tries to pop out due to centrifugal force, one spring 4 of the springs 3 and 4 comes into contact with the parallel member 54 and the interval l 4 becomes 0, and the parallel member 54 Protects against damage by acting as a stopper. On the contrary, when cleaning the head chip 5, an abnormal force may be applied in the direction of the arrow B, that is, in the direction of the center of the rotary drum. Abutting member 54 and spacing
l 3 becomes 0, also protecting from damage.
次に前述の前記磁気テープ９が前記ヘッドチップ５に接
触しているため、前記磁気テープ９の押圧力により、前
記ヘッドチップ５の前記回転ドラム外周からの突出量は
約45μｍとなり、前記ヘッドチップ５と前記磁気テープ
９との接触力は約2.5gr-fとなる点に関し、第４図を使
って更に詳しく説明する。第４図において、横軸はヘッ
ドチップ５の前記回転ドラム外周からの突出量に対する
前記ヘッドチップ５を含む可動部に加わる遠心力と前記
ばね３、４の復元力との差の力（第３図矢印Ａ方向の
力）の変化を示したものである。即ち、回転ドラムが回
転を開始し遠心力とバネ３、４による復元力がバランス
するまでの経時変化であり、バランス点は（ル）であ
る。（イ）はテープがヘッドと接触していない状態での
変化を示す。（ロ）は前記ヘッドチップ５の前記回転ド
ラム外周からの突出量に対する前記磁気テープ９の押圧
力磁気テープの張力によりヘッドチップが受ける押圧力
の変化を示したものである。これら（イ）、（ロ）の直
線が交差する点（ハ）が前記ヘッドチップ５を含む可動
部に加わる遠心力と前記ばね３、４の復元力との差の力
と前記磁気テープ９の押圧力がバランスした点で、横軸
は前記ヘッドチップ５の突出量で約45μｍであり、磁気
テープ９によるヘッドチップ５による押圧力は約2.5gr-
fを示す。Next, since the magnetic tape 9 is in contact with the head chip 5, the pressing force of the magnetic tape 9 causes the protrusion amount of the head chip 5 from the outer periphery of the rotary drum to be about 45 μm. The contact force between the magnetic tape 5 and the magnetic tape 9 is about 2.5 gr-f, which will be described in more detail with reference to FIG. In FIG. 4, the horizontal axis represents the force of the difference between the centrifugal force applied to the movable portion including the head chip 5 and the restoring force of the springs 3 and 4 with respect to the protrusion amount of the head chip 5 from the outer periphery of the rotary drum (third part). The change in the force in the direction of arrow A) is shown. That is, it is a change with time until the rotating drum starts rotating and the centrifugal force and the restoring force by the springs 3 and 4 are balanced, and the balance point is (L). (A) shows a change in a state where the tape is not in contact with the head. (B) shows a change in the pressing force received by the head chip due to the pressing force of the magnetic tape 9 with respect to the protrusion amount of the head chip 5 from the outer circumference of the rotary drum. The point (c) where these straight lines (a) and (b) intersect is the difference between the centrifugal force applied to the movable part including the head chip 5 and the restoring force of the springs 3 and 4 and the magnetic tape 9 In terms of the balance of the pressing force, the horizontal axis indicates the protrusion amount of the head chip 5 of about 45 μm, and the pressing force of the head chip 5 by the magnetic tape 9 is about 2.5 gr-
Indicates f.
ところで、例えば8mmビデオやR-DATのようにドラム径
（前者は40mm、後者は30mm）が小さくなると遠心力も小
さくなる。第４図に示すように、前記ヘッドチップ５の
前記回転ドラム外周からの突出量に対する前記ヘッドチ
ップ５を含む可動部に加わる遠心力と前記ばね３、４の
復元力との差の力（第３図矢印Ａ方向の力）の変化は
（ニ）となり、前記磁気テープ９による磁気テープに対
する押圧力は点（ホ）の横軸で示され、前記ヘッドチッ
プ５の突出量は点（ホ）の縦軸で示される。By the way, if the drum diameter (40 mm for the former and 30 mm for the latter) becomes smaller as in the case of 8 mm video and R-DAT, the centrifugal force also becomes smaller. As shown in FIG. 4, the difference between the centrifugal force applied to the movable portion including the head chip 5 and the restoring force of the springs 3 and 4 with respect to the protrusion amount of the head chip 5 from the outer periphery of the rotary drum ( The change in the force in the direction of arrow A in FIG. 3 is (d), the pressing force of the magnetic tape 9 against the magnetic tape is indicated by the horizontal axis of the point (e), and the protrusion amount of the head chip 5 is the point (e). Is indicated by the vertical axis.
最近は、長時間記録を行うために、磁気テープの厚さが
薄くなり、前記ヘッドチップ５の前記回転ドラム外周か
らの突出量に対する前記磁気テープ９の押圧力（第３図
矢印Ｂ方向の力）の変化が（ヌ）の特性を示すような磁
気テープが使用される。前記ヘッドチップ５と前記磁気
テープ９との押圧力は点（ヘ）の縦軸で示され、前記ヘ
ッドチップ５の突出量は点（ヘ）の横軸で示される。こ
の場合、前記ヘッドチップ５に対する前記磁気テープ９
との押圧力は小さく、また前記ヘッドチップ５の突出量
も小さいため、前記ヘッドチップ５と前記磁気テープ９
が最適な当りを示さず、信号の欠損を生じる状態で記録
・再生することになる。Recently, since the magnetic tape is thinned for long-time recording, the pressing force of the magnetic tape 9 (force in the direction of arrow B in FIG. 3) with respect to the protrusion amount of the head chip 5 from the outer circumference of the rotating drum. The magnetic tape whose change of () shows the characteristic of (nu) is used. The pressing force between the head chip 5 and the magnetic tape 9 is indicated by the vertical axis of the point (f), and the protrusion amount of the head chip 5 is indicated by the horizontal axis of the point (f). In this case, the magnetic tape 9 for the head chip 5
Since the pressing force of the head chip 5 is small and the protruding amount of the head chip 5 is small, the head chip 5 and the magnetic tape 9 are
Does not show the optimum hit, and recording / reproduction is performed in a state where a signal loss occurs.
そのため前記回転ドラムの停止状態で、前記回転ドラム
の外周から予め前記ヘッドチップ５を（ト）だけ、例え
ば約20μｍ位突出させておかないと使用できないという
ことになった。予め前記ヘッドチップ５を約20μｍ突出
させると、前記ヘッドチップ５の前記回転ドラム外周か
らの突出量に対する前記ヘッドチップ５を含む可動部に
加わる遠心力と前記ばね３、４の復元力との差の力（第
３図矢印Ａ方向の力）の変化は（チ）となる。予め前記
ヘッドチップ５を約20μｍ突出させることにより、これ
ら（チ）と（ヌ）の直線が交差する交点（リ）が前記ヘ
ッドチップ５を含む可動部に加わる遠心力と前記磁気テ
ープ９の弾性力がバランスした点で、前記ヘッドチップ
５と前記磁気テープ９の接触力は約0.5gr-f、そして前
記ヘッドチップ５の突出量は約30μｍが得られ、前記ヘ
ッドチップ５と前記磁気テープ９が適当な当たりを示
し、信号の欠損を生じることなく記録・再生をすること
ができるようになった。Therefore, when the rotary drum is stopped, the head chip 5 cannot be used unless the head chip 5 is protruded from the outer periphery of the rotary drum by (g) in advance, for example, about 20 μm. When the head chip 5 is projected by about 20 μm in advance, the difference between the centrifugal force applied to the movable portion including the head chip 5 and the restoring force of the springs 3 and 4 with respect to the amount of projection of the head chip 5 from the outer circumference of the rotary drum. The change in the force (the force in the direction of arrow A in FIG. 3) is (H). By projecting the head chip 5 by about 20 μm in advance, the intersection point (i) where the straight lines of (h) and (n) intersect is applied to the movable portion including the head chip 5 and the elasticity of the magnetic tape 9 is applied. From the point that the forces are balanced, the contact force between the head chip 5 and the magnetic tape 9 is about 0.5 gr-f, and the protrusion amount of the head chip 5 is about 30 μm. Indicates an appropriate hit, and recording / playback can be performed without causing signal loss.
ところが、このように停止時に前記ヘッドチップ５を前
記回転ドラム外周より突出させることは、前記ヘッドチ
ップ５の欠けや前記磁気テープ９に傷をつける原因とな
っていた。However, the protrusion of the head chip 5 from the outer periphery of the rotary drum at the time of stopping as described above causes the chip of the head chip 5 and the magnetic tape 9 to be damaged.
本考案は斯る点に鑑みてなされたもので、ヘッドチップ
を予め回転ドラムの外周から突出させておかなくても、
突出させたのと同様な効果を有し、従ってヘッドチップ
の欠けと磁気テープの傷の発生を防止した遠心力型磁気
ヘッド装置を提供することを目的とする。The present invention has been made in view of such a point, and even if the head chip is not previously projected from the outer circumference of the rotary drum,
It is an object of the present invention to provide a centrifugal force type magnetic head device which has the same effect as when it is made to project and therefore prevents the occurrence of chipping of the head chip and scratches of the magnetic tape.
上述の目的を達成するために、本考案は、遠心力型磁気
ヘッド装置において、第１の基板が回転ドラムに微動自
在に装着され第１のばねにより前記回転ドラムの中心方
向に偏倚され、ヘッドチップを有する第２の基板が前記
第１の基板に微動自在に装着され第２のばねにより前記
回転ドラムの中心方向に偏奇し、静止時にはヘッドチッ
プをドラム面から突出させず、ついでドラムの回転開始
と共に、前記回転ドラムの回転による遠心力により、前
記第１のばねに抗して前記第１の基板を前記ヘッドチッ
プの突出方向に微動させ、前記第２のばねに抗して前記
第２の基板を前記ヘッドチップの突出方向に微動させ
る。In order to achieve the above-mentioned object, the present invention provides a centrifugal force type magnetic head device in which a first substrate is mounted on a rotating drum so as to be finely movable, and is biased toward the center of the rotating drum by a first spring. A second substrate having a chip is mounted on the first substrate so as to be capable of fine movement, and is biased toward the center of the rotary drum by a second spring, so that the head chip does not protrude from the drum surface when stationary and then the drum rotates. At the same time, the centrifugal force generated by the rotation of the rotary drum slightly moves the first substrate in the protruding direction of the head chip against the first spring and the second spring against the second spring. The substrate is finely moved in the protruding direction of the head chip.
このように、第１の基板が回転ドラムに微動自在に装着
されて第１のばねにより前記回転ドラムの中心方向に偏
倚され、ヘッドチップを有する第２の基板が前記第１の
基板に微動自在に装着され第２のばねにより前記回転ド
ラムの中心方向に偏倚されてなり、前記回転ドラムの回
転による遠心力により、前記第１のばねに抗して前記第
１の基板を前記ヘッドチップ突出方向に微動させ、前記
第２のばねに抗して前記第２の基板を前記ヘッドチップ
突出方向に微動させることにより、停止時のヘッドチッ
プを予め回転ドラム外周より突出させておかなくても、
ドラムの回転による遠心力により突出させる事ができ従
来の様なヘッドチップの欠けや磁気テープの傷の発生を
防止する。In this way, the first substrate is mounted on the rotary drum so that it can be finely moved, and is biased toward the center of the rotary drum by the first spring, and the second substrate having the head chip can be finely moved on the first substrate. Mounted on the first substrate and biased toward the center of the rotary drum by a second spring, the centrifugal force generated by the rotation of the rotary drum causes the first substrate to move in the head chip projecting direction against the first spring. By slightly moving the second substrate in the head chip projecting direction against the second spring, so that the head chip at the time of stop does not have to be projected from the outer circumference of the rotating drum in advance.
It can be projected by centrifugal force due to the rotation of the drum, and prevents the conventional chipping of the head chip and the scratching of the magnetic tape.
以下、第１図及び第２図を参照しながら本考案の遠心力
型磁気ヘッド装置を説明するに、従来技術として説明し
た第３図の部材で本考案と同様なものは、従来技術と対
応する部分に同一符号を付して説明する。The centrifugal force type magnetic head device of the present invention will be described below with reference to FIGS. 1 and 2. The members of FIG. 3 described as the prior art are similar to those of the present invention and correspond to the prior art. The same reference numerals are given to the parts to be described.
第１図は本考案の遠心力型磁気ヘッド装置であって、
（Ａ）は平面図で、（Ｂ）は正面図である。第２図はヘ
ッドチップが組み込まれた本考案の第１のヘッド基板
で、（Ａ）は平面図で、（Ｂ）は正面図、そして（Ｃ）
は側面図である。FIG. 1 shows a centrifugal magnetic head device according to the present invention,
(A) is a plan view and (B) is a front view. FIG. 2 is a first head substrate of the present invention in which a head chip is incorporated, (A) is a plan view, (B) is a front view, and (C).
Is a side view.
第１図において、本考案では、第１の基板１は同図
（Ａ）平面図に示すように略平行の２辺を含む略半円状
の外形を有し、この略平行の２辺に平行な２条の溝を有
する。第２のばね３、４は、例えば２枚の平行板ばね
（第２のばねＡ、Ｂと図示）であって、この第２のばね
３、４が前記第１の基板１に前記平行な２条の溝の中に
設けられ、この第２のばね３、４の一端はこの第１の基
板１は適宣手段で固着され、この各他端には第２の基板
２が固着される。この第２の基板２の先端には、ヘッド
チップ５が取付けられる。即ち、このヘッドチップ５を
有する前記第２の基板２が前記第１の基板１に微動自在
に装着され、前記第２のばね３、４により回転ドラム10
の中心方向に偏倚されている。且つ前記回転ドラム10の
停止時には、前記第２のばね３、４は前記第１の基板１
の平行な２条の溝と間隔l1、l2があくように取付けられ
る。ブチルゴムなどよりなるダンパー６は、（第２図に
示すように）Ｌ字状の形状をしており、このダンパー６
の一端は前記第１の基板１に固着され、他端は前記第２
の基板２に固着される。このように前記第２の基板２が
組付けられた前記第１の基板１は、第１及び第２の取付
孔７、８を介してビスにより前記回転ドラム10に微動自
在に装着される。即ち、前記第２の取付孔８は長孔にな
っており、前記第２の基板２が組付けられた第１の基板
１は、前記第１の取付孔７を回転中心に前記第２の取付
孔８の長い方の半径の長さだけ、矢印Ａ及びＢ方向、即
ち前記回転ドラム10の外周（前記ヘッドチップ５の突出
方向）及び中心方向に微動自在になっている。前記回転
ドラム10の停止時には、前記第２の基板２が組み付けら
れた第１の基板１は、第１のばね11により矢印Ｂ方向、
即ち前記回転ドラム10の中心方向に偏倚されていて、前
記ヘッドチップ５は前記回転ドラム10の外周より内側に
入った所に位置する。以上のように本考案の遠心力型磁
気ヘッド装置は構成される。Referring to FIG. 1, in the present invention, the first substrate 1 has a substantially semicircular outer shape including substantially parallel two sides as shown in the plan view of FIG. It has two parallel grooves. The second springs 3 and 4 are, for example, two parallel leaf springs (shown as second springs A and B), and the second springs 3 and 4 are parallel to the first substrate 1. The second springs 3 and 4 are provided in two grooves, and one end of each of the second springs 3 and 4 is fixed to the first substrate 1 by an appropriate means, and each of the other ends is fixed to the second substrate 2. . A head chip 5 is attached to the tip of the second substrate 2. That is, the second substrate 2 having the head chip 5 is mounted on the first substrate 1 so as to be finely movable, and the rotary drum 10 is moved by the second springs 3 and 4.
Is biased toward the center of. In addition, when the rotary drum 10 is stopped, the second springs 3 and 4 cause the first substrate 1 to move.
It is installed so that there are two parallel grooves and the intervals l 1 and l 2 . The damper 6 made of butyl rubber or the like has an L-shape (as shown in FIG. 2).
Has one end fixed to the first substrate 1 and the other end connected to the second substrate 1.
Is fixed to the substrate 2. The first substrate 1 to which the second substrate 2 is assembled in this way is finely attached to the rotary drum 10 by means of screws through the first and second mounting holes 7 and 8. That is, the second mounting hole 8 is a long hole, and the first substrate 1 to which the second substrate 2 is assembled has the second mounting hole 7 with the second mounting hole 7 as the center of rotation. The length of the longer radius of the mounting hole 8 allows fine movement in the directions of arrows A and B, that is, in the outer circumference of the rotary drum 10 (the protruding direction of the head chip 5) and the central direction. When the rotary drum 10 is stopped, the first substrate 1 on which the second substrate 2 is assembled is moved by the first spring 11 in the direction of arrow B,
That is, the head chip 5 is offset toward the center of the rotary drum 10, and the head chip 5 is located inside the outer periphery of the rotary drum 10. The centrifugal force type magnetic head device of the present invention is constructed as described above.
次に、このような遠心力型磁気ヘッド装置の動作を説明
する。前記回転ドラム10の停止時には、前述のように、
前記第２の基板２が組付けられた前記第１の基板１は、
前記第１のばね11により、矢印Ｂ方向に偏倚されてい
て、前記ヘッドチップ５は前記回転ドラム10の外周より
内側に入った所に位置している。前記回転ドラム10の回
転により、前記第２の基板２が組付けられた前記第１の
基板１に遠心力が働くと、矢印Ａ方向、即ち前記回転ド
ラム10の外周方向（前記ヘッドチップ５の突出方向）に
この遠心力が働き、前記第２の基板２が組付けられた前
記第１の基板１は、前記第１のばね11に抗して矢印Ａ方
向に微動し、前記回転ドラム10の内周に前記ヘッド基板
１の略半円状の外形が突き当って停止する。この時、前
記第２の基板２の先端に取付けられた前記ヘッドチップ
５は、その突出方向に前記回転ドラム10の外周から約20
μｍ微動し突出する。一方、前記ヘッドチップ５が組付
けられた前記第２の基板２にも遠心力が加わり、この遠
心力と前記第２のばね３、４の復元力の差の力により、
前記へっドチップ５がその突出方向に前記回転ドラム10
の外周から微動し突出する。このような前記ヘッドチッ
プ５の前記回転ドラム10からの微動突出により、前記ヘ
ッドチップ５は磁気テープ９に接触し、記録・再生を行
う。Next, the operation of such a centrifugal force type magnetic head device will be described. When the rotary drum 10 is stopped, as described above,
The first substrate 1 to which the second substrate 2 is assembled is
The head spring 5 is biased in the direction of arrow B by the first spring 11, and the head chip 5 is located inside the outer circumference of the rotary drum 10. When a centrifugal force acts on the first substrate 1 to which the second substrate 2 is attached by the rotation of the rotary drum 10, the direction of arrow A, that is, the outer peripheral direction of the rotary drum 10 (of the head chip 5). This centrifugal force acts in the projecting direction), and the first substrate 1 to which the second substrate 2 is attached slightly moves in the direction of arrow A against the first spring 11 to rotate the rotary drum 10. The substantially semicircular outer shape of the head substrate 1 abuts on the inner circumference of the and stops. At this time, the head chip 5 attached to the tip of the second substrate 2 is about 20 degrees from the outer circumference of the rotary drum 10 in the protruding direction.
It moves slightly by μm and protrudes. On the other hand, centrifugal force is also applied to the second substrate 2 to which the head chip 5 is attached, and due to the difference between the centrifugal force and the restoring force of the second springs 3 and 4,
The head chip 5 is arranged in the protruding direction of the rotary drum 10.
It slightly moves from the outer periphery of the and protrudes. By such fine movement protrusion of the head chip 5 from the rotary drum 10, the head chip 5 contacts the magnetic tape 9 to perform recording / reproduction.
最近では、長時間記録を行うための薄い磁気テープ９が
使用され、この薄い磁気テープ９が前記回転ドラム10の
外周に巻きつけられ、前記ヘッドチップ５がこの磁気テ
ープ９に接触しているため、この磁気テープ９の弾性力
により、前記ヘッドチップ５の前記回転ドラム10の外周
からの突出量は約30μｍとなり、前記磁気テープ９との
接触力は約0.5gr-fとなる。Recently, a thin magnetic tape 9 for recording for a long time is used, and the thin magnetic tape 9 is wound around the outer circumference of the rotary drum 10, and the head chip 5 is in contact with the magnetic tape 9. Due to the elastic force of the magnetic tape 9, the protrusion amount of the head chip 5 from the outer periphery of the rotary drum 10 is about 30 μm, and the contact force with the magnetic tape 9 is about 0.5 gr-f.
次に異常なとき、前記ヘッドチップ５が遠心力により飛
び出そうとしても、前記第２のばね３、４が前記第１の
基板１の前記２条の溝の側壁に当接して間隔l1が０にな
り、前記第１の基板１がストッパーの役目をすること
で、破損から保護する。また、前記ヘッドチップ５のク
リーニングのときには、逆に矢印Ｂ方向、即ち前記回転
ドラムの中心方向に異常力が加わることがあるが、この
ときは前記第２のばね３、４が前記第１の基板１の前記
２条の溝の側壁に当接して間隔l2が０となり、やはり破
損から保護する。Next, when the head chip 5 tries to jump out due to a centrifugal force in an abnormal condition, the second springs 3 and 4 come into contact with the side walls of the two grooves of the first substrate 1 and the gap l 1 is reduced. It becomes 0, and the first substrate 1 serves as a stopper to protect it from damage. On the contrary, when the head chip 5 is cleaned, an abnormal force may be applied in the direction of the arrow B, that is, in the direction of the center of the rotary drum, but at this time, the second springs 3 and 4 cause the first spring to move. By contacting the side walls of the two grooves of the substrate 1, the distance l 2 becomes 0, which also protects from damage.
次に、前述のように前記磁気テープ９が前記ヘッドチッ
プ５に接触しているため、前記磁気テープ９の弾性力に
より、前記ヘッドチップ５の前記回転ドラム10の外周か
らの突出量が約30μｍであり、前記磁気テープ９との接
触力は約0.5gr-fとなる点に関し第４図を使って更に詳
しく説明する。前記回転ドラム10の回転により、前記第
２の基板２が組付けられた前記第１の基板１に遠心力が
働くと、前記第２の基板２が組付けられた前記第１の基
板１は、前記第１のばね11に抗して第１図矢印Ａ方向に
微動し、前記第２の基板２の先端に取付けられた前記ヘ
ッドチップ５はその突出方向に前記回転ドラム10の外周
から、第４図（ト）に示すように、約20μｍ微動し突出
する。基板１に生じる遠心力とバネ11の復元力がバラン
スし（ト）の範囲で静止する、ついでヘッドチップ５が
組付けられた前記第２の基板２にも遠心力が加わり、こ
の遠心力と前記第２のばね３、４の復元力との差（第１
図矢印Ａ方向の力）の経時変化は（チ）に示すようにな
る。Next, since the magnetic tape 9 is in contact with the head chip 5 as described above, the amount of protrusion of the head chip 5 from the outer periphery of the rotary drum 10 by the elastic force of the magnetic tape 9 is about 30 μm. The contact force with the magnetic tape 9 is about 0.5 gr-f, which will be described in more detail with reference to FIG. When a centrifugal force acts on the first substrate 1 to which the second substrate 2 is attached due to the rotation of the rotating drum 10, the first substrate 1 to which the second substrate 2 is attached becomes , The head chip 5 mounted on the tip of the second substrate 2 slightly moves in the direction of arrow A in FIG. 1 against the first spring 11, and in the protruding direction thereof, from the outer periphery of the rotary drum 10, As shown in Fig. 4 (g), it slightly moves and protrudes by about 20 µm. The centrifugal force generated on the substrate 1 and the restoring force of the spring 11 are balanced, and the stationary state is maintained within the range of (g). Then, the centrifugal force is also applied to the second substrate 2 having the head chip 5 attached, and this centrifugal force Difference from the restoring force of the second springs 3 and 4 (first
The change with time of the force in the direction of arrow A in the figure is as shown in (h).
最近では、長時間記録を行うための薄い磁気テープ９が
使用され、前記ヘッドチップ５の前記回転ドラム10の外
周からの突出量に対するこの磁気テープ９の押圧力（第
１図矢印Ｂ方向の力）の変化は、（ヌ）で示される。こ
れら（チ）と（ヌ）の直線が交差する交点（リ）が前記
ヘッドチップ５に加わる遠心力と前記磁気テープ９の押
圧力がバランスした点であり、前記ヘッドチップ５と前
記磁気テープ９の接触力は約0.5gr-f、そして前記ヘッ
ドチップ５の突出量は約30μｍが、前記ヘッドチップ５
を予め突出させることなく得られ、前記ヘッドチップ５
と前記磁気テープ９が適当な当たりを示し、信号の欠損
を生じることなく記録・再生をすることができる。Recently, a thin magnetic tape 9 is used for long-time recording, and the pressing force of the magnetic tape 9 (force in the direction of arrow B in FIG. 1) with respect to the protrusion amount of the head chip 5 from the outer periphery of the rotary drum 10 is used. ) Changes are indicated by (nu). An intersection (i) where these straight lines of (h) and (n) intersect is a point where the centrifugal force applied to the head chip 5 and the pressing force of the magnetic tape 9 are balanced, and the head chip 5 and the magnetic tape 9 are balanced. The contact force of the head chip 5 is about 0.5 gr-f, and the protrusion amount of the head chip 5 is about 30 μm.
Is obtained without preliminarily protruding the head chip 5
Thus, the magnetic tape 9 shows a proper hit, and recording / reproducing can be performed without loss of signal.
以上、本考案の遠心力型磁気ヘッド装置の一実施例につ
いて説明したが、本考案は上述の実施例に限定されるも
のでなく、本考案の趣旨を逸脱しない範囲で種々の応用
が取り得る。An embodiment of the centrifugal magnetic head device of the present invention has been described above, but the present invention is not limited to the above-mentioned embodiment, and various applications can be made without departing from the spirit of the present invention. .
以上の説明で明らかなように、本考案の遠心力型磁気ヘ
ッド装置であっては、第１の基板が回転ドラムに微動自
在に装着されて第１のばねにより前記回転ドラムの中心
方向に偏倚され、ヘッドチップを有する第２の基板が前
記第１の基板に微動自在に装着され第２のばねにより前
記回転ドラムの中心方向に偏倚されてなり、前記回転ド
ラムの回転による遠心力により、前記第１のばねに抗し
て前記第１の基板を前記ヘッドチップ突出方向に微動さ
せ、前記第２のばねに抗して前記第２の基板を前記ヘッ
ドチップ突出方向に微動させることにより、停止時のヘ
ッドチップを予め回転ドラム外周より突出させておかな
くても、突出させたのと同様な効果を得て、従ってヘッ
ドチップの欠けや磁気テープの傷の発生を防止する。As is apparent from the above description, in the centrifugal magnetic head device of the present invention, the first substrate is mounted on the rotating drum so that it can be finely moved, and is biased toward the center of the rotating drum by the first spring. A second substrate having a head chip is mounted on the first substrate so as to be capable of fine movement, and is biased toward the center of the rotary drum by a second spring. Stop by finely moving the first substrate in the head chip protruding direction against the first spring and finely moving the second substrate in the head chip protruding direction against the second spring. Even if the head chip is not protruded from the outer circumference of the rotary drum in advance, the same effect as when the head chip is protruded is obtained, and therefore, chipping of the head chip and damage to the magnetic tape are prevented.
第１図は本考案の遠心力型磁気ヘッド装置であって、
（Ａ）は平面図で、（Ｂ）は正面図である。第２図はヘ
ッドチップが組み込まれた本考案の第１のヘッド基板
で、（Ａ）は平面図で、（Ｂ）は正面図、そして（Ｃ）
は側面図である。 第３図は従来の遠心力型磁気ヘッド装置であって、
（Ａ）は平面図で、（Ｂ）は要部断面図である。 第４図はヘッドチップと磁気テープの接触力を説明する
ための図である。 １……第１の基板 ２……第２の基板 ３……第２のばねＡ ４……第２のばねＢ ５……ヘッドチップ ６……ダンパー ７……第１の取付孔 ８……第２の取付孔 ９……磁気テープ 10……回転ドラム 11……第１のばねFIG. 1 shows a centrifugal magnetic head device according to the present invention,
(A) is a plan view and (B) is a front view. FIG. 2 is a first head substrate of the present invention in which a head chip is incorporated, (A) is a plan view, (B) is a front view, and (C).
Is a side view. FIG. 3 shows a conventional centrifugal magnetic head device,
(A) is a plan view and (B) is a cross-sectional view of a main part. FIG. 4 is a diagram for explaining the contact force between the head chip and the magnetic tape. 1 ... 1st board 2 ... 2nd board 3 ... 2nd spring A 4 ... 2nd spring B 5 ... Head chip 6 ... Damper 7 ... 1st mounting hole 8 ... Second mounting hole 9 ... Magnetic tape 10 ... Rotating drum 11 ... First spring
Claims (1)
され第１のばねにより前記回転ドラムの中心方向に偏奇
されるとともに、ヘッドチップを有する第２の基板が前
記第１の基板に微動自在に装着されるとともに、前記回
転ドラムの中心方向に偏奇されてなり、静止時には前記
ヘッドチップをドラム面より突出させず、前記回転ドラ
ムの回転開始時に遠心力により、前記第１のばねに抗し
て前記第１の基板を前記ヘッドチップの突出方向に微動
させて、前記ヘッドチップをドラム面より突出させ、次
いで前記第２のばねに抗して前記第２の基板を前記ヘッ
ドチップの突出方向に微動させる事を特徴とした遠心力
型磁気ヘッド装置。1. A first substrate is mounted on a rotating drum so that it can be moved slightly, and is biased toward the center of the rotating drum by a first spring, and a second substrate having a head chip is attached to the first substrate. It is mounted so that it can be moved slightly, and is biased toward the center of the rotary drum. The head chip does not protrude from the drum surface when stationary, and the first spring is rotated by centrifugal force when the rotary drum starts rotating. Against this, the first substrate is finely moved in the projecting direction of the head chip to project the head chip from the drum surface, and then the second substrate is mounted to the head chip against the second spring. Centrifugal force type magnetic head device characterized by finely moving in the protruding direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5522188U JPH0728569Y2 (en) | 1988-04-26 | 1988-04-26 | Centrifugal magnetic head device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5522188U JPH0728569Y2 (en) | 1988-04-26 | 1988-04-26 | Centrifugal magnetic head device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01159209U JPH01159209U (en) | 1989-11-02 |
| JPH0728569Y2 true JPH0728569Y2 (en) | 1995-06-28 |
Family
ID=31281119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5522188U Expired - Lifetime JPH0728569Y2 (en) | 1988-04-26 | 1988-04-26 | Centrifugal magnetic head device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0728569Y2 (en) |
-
1988
- 1988-04-26 JP JP5522188U patent/JPH0728569Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01159209U (en) | 1989-11-02 |
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