JPH04102217A - Electromagnetic transform characteristic measuring machine - Google Patents
Electromagnetic transform characteristic measuring machineInfo
- Publication number
- JPH04102217A JPH04102217A JP21818090A JP21818090A JPH04102217A JP H04102217 A JPH04102217 A JP H04102217A JP 21818090 A JP21818090 A JP 21818090A JP 21818090 A JP21818090 A JP 21818090A JP H04102217 A JPH04102217 A JP H04102217A
- Authority
- JP
- Japan
- Prior art keywords
- rotating drum
- magnetic
- magnetic recording
- recording medium
- 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
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 44
- 238000004804 winding Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 5
- 239000002390 adhesive tape Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気記録媒体や磁気ヘッドの電磁変換特性を
評価するための@磁変換特性測定機に関するものであり
、特に回転ドラムと固定ヘッドを用いたtMi変換特性
測定機の改良に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a @magnetic conversion characteristic measuring device for evaluating the electromagnetic conversion characteristics of magnetic recording media and magnetic heads, and particularly relates to a magnetic conversion characteristic measuring device for evaluating the electromagnetic conversion characteristics of magnetic recording media and magnetic heads. This invention relates to an improvement of a tMi conversion characteristic measuring device using a tMi conversion characteristic measuring device.
本発明は、磁気記録媒体が巻き付けられた回転ドラムを
回転させながら固定ヘッドを接触させ、磁気記録媒体や
磁気ヘッドの1を磁変換特性を評価する電磁変換特性測
定機において、磁気ヘッドを回転ドラムの内側より外周
面に巻き付けられた磁気記録媒体に摺接させることによ
り、磁気記録媒体へのダメージを回避しようとするもの
である。The present invention is an electromagnetic conversion characteristic measuring machine that evaluates the magnetic conversion characteristics of a magnetic recording medium or a magnetic head by bringing a fixed head into contact with the rotating drum while rotating the rotating drum around which a magnetic recording medium is wound. This is intended to avoid damage to the magnetic recording medium by slidingly contacting the magnetic recording medium wound around the outer circumferential surface of the magnetic recording medium from the inside.
磁気記録媒体や磁気ヘッドにおける電磁変換特性を評価
する電磁変換特性測定機としては、種々の方式のものが
知られているが、なかでも回転ドラムと固定ヘッドを用
いる測定機は、ビデオテープレコーダのように磁気ヘッ
ドが回転しないので、装置構成が簡単で取扱いも容易で
あり、各種磁気記録媒体や磁気ヘッドの評価に広く用い
られている。Various types of electromagnetic conversion characteristic measuring machines are known for evaluating the electromagnetic conversion characteristics of magnetic recording media and magnetic heads, but among them, measuring machines that use a rotating drum and fixed head are suitable for video tape recorders. Since the magnetic head does not rotate, the apparatus has a simple configuration and is easy to handle, and is widely used for evaluating various magnetic recording media and magnetic heads.
例えば、この種の電磁変換特性測定機としては、第10
図及び第11図に示すように、磁気記録媒体(51)を
巻き付ける円筒状の回転ドラム(52)と、この回転ド
ラム(52)に巻き付けられた磁気記録媒体(51)に
接触して!磁変換特性を測定する固定ヘッド(53)と
からなる。For example, as this type of electromagnetic conversion characteristic measuring machine, the 10th
As shown in the figure and FIG. 11, a cylindrical rotating drum (52) around which a magnetic recording medium (51) is wound, and a magnetic recording medium (51) wound around this rotating drum (52) are contacted! It consists of a fixed head (53) for measuring magnetic conversion characteristics.
上記回転ドラム(52)は、磁気記録媒体(51)を内
周面(52a)に巻き付け、モータ(54)によって回
転駆動されるようになされている。一方、固定へ・ラド
(53)は、ヘッドアーム(55)の先端に取付けられ
、上記回転ドラム(52)の内側より、該回転ドラム(
52)の内周面(52a)に巻き付けられる磁気記録媒
体(5])に接触するようになっている。このときの固
定ヘッド(53)は、磁気記録媒体(51)に対して回
転ドラム(52)の内周面(52a)に設けられる円環
状の逃げ溝(56)位置で接触するようになされている
。The rotating drum (52) has a magnetic recording medium (51) wound around its inner peripheral surface (52a), and is rotationally driven by a motor (54). On the other hand, the fixing rod (53) is attached to the tip of the head arm (55), and is attached to the rotary drum (52) from inside the rotary drum (52).
It comes into contact with the magnetic recording medium (5]) wound around the inner circumferential surface (52a) of the magnetic recording medium (52). At this time, the fixed head (53) is brought into contact with the magnetic recording medium (51) at the annular relief groove (56) provided on the inner peripheral surface (52a) of the rotating drum (52). There is.
つまり、これら固定ヘッド(53)と磁気記録媒体(5
1)とはある程度弾力を持って突当てられ、良好な当た
り特性が得られるようになっている。In other words, these fixed heads (53) and magnetic recording media (53)
1) is designed to be struck with a certain degree of elasticity and good contact characteristics can be obtained.
ところが、磁気記録媒体(5I)は、幅方向の両端部が
前記回転ドラム(52)の内周面(52a)に押し付け
られることで巻き付けられているため、固定ヘッド(5
3)の突き出し量が少しでも多くなると、磁気記録媒体
(51)にダメージが加わる。特に、C0−Cr系の金
属磁性1膜を磁性層とする磁気記録媒体のように、ヤン
グ率(縦弾性係数)の高い磁気記録媒体においては顕著
である。したがって、上述の測定機では、磁気記録媒体
や磁気へ、ドの正確な電磁変換特性の評価が行えない。However, since the magnetic recording medium (5I) is wound so that both ends in the width direction are pressed against the inner circumferential surface (52a) of the rotating drum (52), the fixed head (5I)
If the amount of protrusion 3) increases even slightly, damage will be added to the magnetic recording medium (51). This is particularly noticeable in a magnetic recording medium having a high Young's modulus (longitudinal elastic modulus), such as a magnetic recording medium whose magnetic layer is a C0-Cr metal magnetic film. Therefore, the above-mentioned measuring device cannot accurately evaluate the electromagnetic conversion characteristics of magnetic recording media and magnetism.
また、磁気記録媒体(51)の回転ドラム(52)への
固定は、第12圀や第13図に示すように、固定ヘッド
(53)が接触する部分を除く磁気記録媒体(51)の
幅方向の両端部をバネ(57)で押さえる方法や回転ド
ラム(52)にエアー吸い込み用の孔(5B)を設はエ
アーの吸引によって押さえる方法等が採用されているが
、ハ* (57)による方法では磁気記録媒体(51)
を押さえ込むのが非常に難しく、エアーによる方法では
装置構成が複雑化する。Furthermore, the magnetic recording medium (51) is fixed to the rotating drum (52) by measuring the width of the magnetic recording medium (51) excluding the portion where the fixed head (53) contacts, as shown in Figure 12 and Figure 13. Methods such as holding both ends of the direction with springs (57), and holding holes (5B) for air suction in the rotating drum (52) by suctioning air have been adopted, but according to Ha* (57) In the method, magnetic recording media (51)
It is very difficult to hold down the air, and the device configuration becomes complicated when using air.
C課題を解決しようとする課題〕
そこで本発明は、かかる従来の実情に鑑みて提案された
ものであり、磁気記録媒体へのダメージを無くし、磁気
記録媒体や磁気ヘッドの正確な電磁変換特性の評価が行
える電磁変換特性測定機を提供することを目的とすると
ともに、磁気記録媒体の回転ドラムへの取付けが容易に
行える簡単な構造の!磁変換特性測定機をgl供するこ
とを目的とするものである。Problem to be Solved by Problem C] Therefore, the present invention has been proposed in view of the conventional situation, and aims to eliminate damage to magnetic recording media and to accurately determine the electromagnetic conversion characteristics of magnetic recording media and magnetic heads. The purpose is to provide an electromagnetic conversion characteristic measuring device that can perform evaluations, and also has a simple structure that allows easy attachment of magnetic recording media to a rotating drum! The purpose is to provide a magnetic conversion characteristic measuring instrument.
上述の目的を達成するために、本発明のtN変換特性測
定機は、上回転ドラムと下回転ドラムが所定の間隙をも
って突き合わされてなり、これら回転ドラムの外周面に
巻き付けられる磁気記録媒体に該回転ドラムの内側より
上記間隙を通して磁気ヘッドが摺接して!磁変換特性を
測定することを特徴とするものである。In order to achieve the above-mentioned object, the tN conversion characteristic measuring device of the present invention comprises an upper rotating drum and a lower rotating drum that are butted against each other with a predetermined gap, and a magnetic recording medium that is wound around the outer peripheral surface of these rotating drums. The magnetic head slides into contact with the rotating drum through the above gap from the inside! This method is characterized by measuring magnetic conversion characteristics.
本発明にかかるitM1変換特性測定機においては、所
定の間隙をもって突き合わされた回転ドラムの外周面に
巻き付けられる磁気記録媒体に、回転ドラムの内側より
上記間隙を通して磁気ヘッドが摺接して電磁変換特性が
測定されるように構成されているので、磁気ヘッドが前
へ突き出てた場合、磁気記録媒体が回転ドラムから浮き
、該磁気記録媒体へのダメージが回避される。In the itM1 conversion characteristic measuring device according to the present invention, a magnetic head slides into contact with a magnetic recording medium wound around the outer circumferential surface of rotating drums that are abutted against each other with a predetermined gap through the gap from the inside of the rotating drum to measure electromagnetic conversion characteristics. Since the magnetic recording medium is configured to be measured, when the magnetic head protrudes forward, the magnetic recording medium is lifted from the rotating drum, thereby avoiding damage to the magnetic recording medium.
また、本発明の測定機では、磁気ヘッドと磁気記録媒体
の接触状態が実際のビデオテープレコーダと同じ状態と
なるので、実際に近い状態の当たり特性が得られ、これ
ら磁気ヘッドと磁気記録媒体の正確な電磁変換特性の評
価が行える。In addition, in the measuring device of the present invention, the contact state between the magnetic head and the magnetic recording medium is the same as that in an actual video tape recorder, so it is possible to obtain contact characteristics that are close to the actual state. Accurate evaluation of electromagnetic conversion characteristics can be performed.
以下、本発明を通用した具体的な実施例を図面を参照し
ながら説明する。Hereinafter, specific embodiments in which the present invention is applied will be described with reference to the drawings.
本実施例の1を磁変換特性測定機は、第1図に示すよう
に、回転ドラム(1)と固定ヘッド(2)とを主な構成
要素とするものであり、前記回転ドラム(1)の外周面
に磁気記録媒体を巻き付けるとともに回転ドラム(])
をモータ(3)によって回転駆動し、該磁気記録媒体に
固定ヘッド(2)を接触させて電磁変換特性を測定する
ものである。As shown in FIG. 1, the magnetic conversion characteristic measuring device according to Embodiment 1 has a rotating drum (1) and a fixed head (2) as main components. A magnetic recording medium is wound around the outer circumferential surface of the rotating drum (]).
is rotated by a motor (3), and a fixed head (2) is brought into contact with the magnetic recording medium to measure electromagnetic conversion characteristics.
前記回転ドラム(1)は、第2図及び第3図に示すよう
に、上回転ドラム(4)と下回転ドラム(5)とからな
り、これらが円柱状の支持部材(6)によって所定の間
隙をもって突合わされてなる。そして、これら上回転ド
ラム(4)と下回転ドラム(5)は、いずれも円環状の
フランジ部(7) 、 (8)を有し、そのフランジ部
(7) 、 (8)に設けられたそれぞの貫通孔(9)
、 (10)に前記支持部材(6)が挿通されて位置
決めされるようになっている。つまり、上記支持部材(
6)が上回転ドラム(4)と下回転ドラム(5)の位置
関係を規制する役目をする。As shown in FIGS. 2 and 3, the rotating drum (1) consists of an upper rotating drum (4) and a lower rotating drum (5), which are held in a predetermined position by a cylindrical support member (6). They are butted together with a gap. The upper rotating drum (4) and the lower rotating drum (5) both have annular flange portions (7) and (8), and the flange portions (7) and (8) are provided with Each through hole (9)
, (10), the support member (6) is inserted through and positioned. In other words, the support member (
6) serves to regulate the positional relationship between the upper rotating drum (4) and the lower rotating drum (5).
また、上記フランジ部(7)、(8)の中心部には、磁
気記録媒体を巻き付けるための円筒状のドラム本体(4
a) 、 (5a)が設けられている。これらドラム本
体(4a) 、 (5a)の周面のうち相対向する先端
部分には段差が設けられ、この段差による段差面(4b
) 。In addition, a cylindrical drum body (4) for winding a magnetic recording medium is provided at the center of the flange portions (7) and (8).
a) and (5a) are provided. A step is provided at the opposing end portions of the circumferential surfaces of these drum bodies (4a) and (5a), and the stepped surface (4b) is formed by this step.
).
(5b)が前記磁気記録媒体を巻き付ける巻回面となっ
ている。また、上記ドラム本体(4a) 、 (5a)
の周面と段差面(4b) 、 (5b)間に設けられる
段差部(4c)(5c)は、上記磁気記録媒体の幅を規
制する面となされており、これら段差部(4c) 、
(5c)間距離は前記支持部材(6)の長さ調節により
磁気記録媒体の幅に応じて調整可能となされている。ま
た、上記ドラム本体(4a) 、 (5a)の相対向す
る側の開口周縁部には、内方へ傾斜する傾斜面(4d)
、 (5d)が設けられ、後述する固定ヘッド(2)
の前記間隙への挿入が容易なものとなされている。(5b) is the winding surface around which the magnetic recording medium is wound. In addition, the drum bodies (4a) and (5a)
The stepped portions (4c) and (5c) provided between the circumferential surface and the stepped surfaces (4b) and (5b) are surfaces that regulate the width of the magnetic recording medium, and these stepped portions (4c) and
(5c) can be adjusted according to the width of the magnetic recording medium by adjusting the length of the support member (6). Further, on the opening periphery of the opposing sides of the drum bodies (4a) and (5a), there is a sloped surface (4d) that slopes inward.
, (5d), and a fixed head (2) to be described later.
can be easily inserted into the gap.
なお、前記上回転ドラム(4)のドラム本体(4a)の
中心部には、固定ベント’(2)を内部に臨ませるため
の円形状のヘッド挿入用孔(4e)が貫通して設けられ
ているが、下回転ドラム(5)では、モータ(3)の回
動輪(3a)の先端部に固定されるため、ヘッド挿入用
孔(5e)が止まり孔とされている。A circular head insertion hole (4e) is provided through the center of the drum body (4a) of the upper rotating drum (4) to allow the fixed vent' (2) to face inside. However, in the lower rotating drum (5), the head insertion hole (5e) is a blind hole because it is fixed to the tip of the rotating wheel (3a) of the motor (3).
上記構成の回転ドラム(1)に巻き付けられる磁気記録
媒体(11)は、第4図及び第5図に示すように、前記
上回転ドラム(4)と下回転ドラム(5)とが突き合わ
されてなる段差面(4b) 、 (5b)に巻き付けら
れ、これら回転ドラム(4) 、 (5)を支える一対
の支持部材(6)にその両端部(lla) 、 (Il
b)が粘着テープ(図示は省略する。)等ムこよって固
定される。このように、磁気記録媒体(11)の回転ド
ラム(1)への巻き付は作業は、該回転ドラム(1)の
外側より行えるため容易にできる。また、磁気記録媒体
(11)の固定も、支持部材(6)に設けた粘着テープ
に貼り付けるだけなので容易である。したがって、測定
時における磁気記録媒体(11)の交換作業の手間が簡
略化できる。As shown in FIGS. 4 and 5, the magnetic recording medium (11) wound around the rotating drum (1) having the above-mentioned structure is arranged so that the upper rotating drum (4) and the lower rotating drum (5) are butted against each other. A pair of supporting members (6) that support these rotating drums (4), (5) are wrapped around the stepped surfaces (4b), (5b), and have both ends (lla), (Il
b) is fixed with adhesive tape (not shown). In this way, winding the magnetic recording medium (11) around the rotating drum (1) can be easily done since the work can be done from the outside of the rotating drum (1). Further, fixing of the magnetic recording medium (11) is also easy because it is simply pasted onto an adhesive tape provided on the support member (6). Therefore, the effort required to replace the magnetic recording medium (11) during measurement can be simplified.
一方、固定ヘッド(2)は、ビデオテープレコーダ等に
搭載される磁気ヘッドからなり、基台(12)に設けら
れたヘッドアーム(13)の先端部に設けられるように
なっている。この固定ヘッド(2)には、記録系として
記録アンプ及びシグナルジェネレータが、再生系として
再生アンプ及びスペクトラムアナライザがそれぞれ切り
換えスイッチを介して接続されており、前記切り換えス
イッチを切り換えることで、磁気記録媒体(11)に対
して記録あるいは再生を行うことができるように構成さ
れている。On the other hand, the fixed head (2) is a magnetic head mounted on a video tape recorder or the like, and is arranged at the tip of a head arm (13) provided on a base (12). A recording amplifier and a signal generator are connected to this fixed head (2) as a recording system, and a reproduction amplifier and a spectrum analyzer are connected as a reproduction system through changeover switches. (11) is configured to be capable of recording or reproducing.
上述のように構成された!磁変換特性測定機を用いて磁
気記録媒体、例えば磁気テープの!磁変換特性を測定す
るには、次のようにして行う。Configured as above! Use a magnetic conversion characteristic measuring machine to measure magnetic recording media, such as magnetic tape! The magnetic conversion characteristics are measured as follows.
先ず、測定する磁気テープ(11)を適当な長さに切断
し、これを第4図及び第5図に示すように、回転ドラム
(1)の外周面に巻き付ける。First, the magnetic tape (11) to be measured is cut to an appropriate length and wound around the outer peripheral surface of the rotating drum (1) as shown in FIGS. 4 and 5.
磁気テープ(11)は、磁性面を内側にして上記回転ド
ラム(1)に設けられた巻き付は面となる段差面(4b
)、 (5b)に沿って巻き付ける。このとき、磁気テ
ープ(11)の幅方向の両端縁が上回転ドラム(4)や
下回転ドラム(5)の段差部(4c) 、 (5c)に
当たる場合には、これら上回転ドラム(4)と下回転ド
ラム(5)の何れかを動かしてこれら段差部(4c)
、 (5c)の間隔を広げるようにする。The magnetic tape (11) is provided on the rotating drum (1) with the magnetic surface inside, and has a stepped surface (4b) where the winding is a surface.
), (5b). At this time, if both ends of the magnetic tape (11) in the width direction hit the stepped portions (4c) and (5c) of the upper rotating drum (4) and the lower rotating drum (5), these upper rotating drums (4) and the lower rotating drum (5) to remove these stepped portions (4c).
, Increase the distance in (5c).
そして、上記磁気テープ(11)の両端部(lla)、
(11b)を上回転ドラム(4)と下回転ドラム(5)
を支える支持部材(6)、(6)の周面に固定する。and both ends (lla) of the magnetic tape (11),
(11b) to the upper rotating drum (4) and lower rotating drum (5)
It is fixed to the peripheral surface of the support members (6), (6) that support the.
なお、磁気テープ(11)の支持部材(6)への固定は
、粘着テープによるが、他の方法でも差し支えない。Note that the magnetic tape (11) is fixed to the support member (6) using adhesive tape, but other methods may also be used.
この結果、磁気テープ(11)は、回転ドラム(1)に
対して両端部(lla) (llb)(llb)だけで
固定された形となる。As a result, the magnetic tape (11) is fixed to the rotating drum (1) only at both ends (lla) (llb) (llb).
次に、ヘッドアーム(13)の先端に固定された固定ヘ
ッド(2)を、第6図に示すように、前記回転ドラム(
1)の内側より上回転ドラム(4)と下回転ドラム(5
)間の間隙に臨ませる。Next, as shown in FIG. 6, the fixed head (2) fixed to the tip of the head arm (13) is attached to the rotating drum (
1) from the inside of the upper rotating drum (4) and lower rotating drum (5).
) to face the gap between.
そして、上記固定ヘッド(2)の先端部を磁気テープ(
11)に接触させ、良好な当たり特性が得られる位置ま
で固定ヘッド(2)を前に突き出す。Then, attach the tip of the fixed head (2) to the magnetic tape (
11) and push the fixed head (2) forward to a position where good contact characteristics can be obtained.
このとき、磁気テープ(11)は、回転ドラム(1)に
対して両端部(lla) 、 (llb)のみで固定さ
れているため、回転ドラム(1)への巻き付は部では固
定ヘッド(2)の突き出しに対してドラム(1)より逃
げる方向に浮くようになっている。したがって、不用意
な固定ヘッド(2)の突き出しに対して、該固定ヘッド
(2)の前記磁気テープ(11)へのダメージが回避さ
れるようになされている。At this time, since the magnetic tape (11) is fixed to the rotating drum (1) only at both ends (lla) and (llb), the winding around the rotating drum (1) is done by the fixed head ( It floats in the direction away from the drum (1) with respect to the protrusion of (2). Therefore, damage to the magnetic tape (11) by the fixed head (2) is avoided even if the fixed head (2) inadvertently protrudes.
また、このときの固定ヘッド(2)と磁気テープ(11
)との接触状態は、第7図に示すように、磁気テープ(
11)の凹形状と固定ヘッド(2)の凸形状の接触とな
っており、実際のビデオテープレコーダにおけるヘッド
と磁気テープの接触形態と同し接触形態がとられている
。したがって、実際のビデオテープレコーダと同様の当
たり特性が得られ、より実際に近い形で電磁変換特性を
評価することができる。Also, the fixed head (2) and magnetic tape (11) at this time are
), as shown in Figure 7, the contact state with the magnetic tape (
The concave shape of the fixed head (2) makes contact with the convex shape of the fixed head (2), which is the same contact form as the head and magnetic tape in an actual video tape recorder. Therefore, it is possible to obtain hit characteristics similar to those of an actual video tape recorder, and to evaluate electromagnetic conversion characteristics in a form closer to reality.
そして、回転ドラム(1)をモータ(3)によって回転
駆動し、前記切り換えスイッチを必要に応して切り換え
、磁気テープ(11)に対して記録あるいは再生を行い
磁気テープ(11)と固定ヘッド(2)の電磁変換特性
をそれぞれ測定する。Then, the rotary drum (1) is rotationally driven by the motor (3), the changeover switch is switched as necessary, and recording or reproduction is performed on the magnetic tape (11). Measure the electromagnetic conversion characteristics of 2).
なお、上述の電磁変換特性測定機においては、磁気テー
プ(11)と固定ヘッド(2)の電磁変換特性を測定し
たが、固定ヘッド(2)の代わりにガラスよりなるヘッ
ドを取付け、これを顕微鏡と組み合わせることで、干渉
縞によるガラスヘッドでのヘッドと磁気テープとの接触
状態を解析することもできる。特に、本例の測定機にお
いては、測定点が連続的に観察することができるため、
C0Cr系の金属磁性El膜を磁性層とする磁気記録媒
体等の当たりが数層単位で激変しているものに関しては
最適である。In addition, in the above-mentioned electromagnetic conversion characteristic measuring machine, the electromagnetic conversion characteristics of the magnetic tape (11) and the fixed head (2) were measured, but a head made of glass was attached in place of the fixed head (2), and this was measured using a microscope. In combination with this, it is also possible to analyze the state of contact between the glass head and the magnetic tape using interference fringes. In particular, with the measuring device of this example, since the measurement points can be observed continuously,
It is most suitable for magnetic recording media whose magnetic layer is a C0Cr-based metal magnetic El film, in which the contact strength changes dramatically in units of several layers.
以上、本発明を適用したit電磁変換特性測定機一実施
例について説明したが、本発明は、上述の実施例に限定
されることなく種々の変更が可能である。Although one embodiment of the IT electromagnetic conversion characteristic measuring device to which the present invention is applied has been described above, the present invention is not limited to the above-described embodiment and can be modified in various ways.
例えば、上述の電磁変換特性測定機では、上回転F′ク
ラム下回転ドラムを所定の間隙となるように突き合わせ
るのに、円筒状の支持部材を使用したが、これを第8図
及び第9図に示すように、略同−形状とした円筒状の上
回転ドラム(14)と下回転ドラム(15)を、これら
回転ドラム(14) 、 (15)を内部に収容する外
枠回転ドラム(17)によって所定の間隙をもって突き
合わせるようにしてもよい。For example, in the above-mentioned electromagnetic conversion characteristic measuring machine, a cylindrical support member was used to butt the upper rotary F' crumb lower rotary drum so as to have a predetermined gap. As shown in the figure, a cylindrical upper rotating drum (14) and a lower rotating drum (15) having approximately the same shape are connected to an outer frame rotating drum ( 17), they may be butted against each other with a predetermined gap.
すなわち、上回転ドラム(14)と下回転ドラム(15
)の外形状に応じた円形状の止まり孔の嵌合孔(18)
を外枠回転ドラム(17)に設け、この嵌合孔(18)
にこれら回転ドラム(14) 、 (15)を圧入して
はめ込み、これら下回転ドラム(15)と上回転ドラム
(14)の間隔を調節する。That is, the upper rotating drum (14) and the lower rotating drum (15)
) A circular blind hole fitting hole (18) according to the external shape of the
is provided on the outer frame rotating drum (17), and this fitting hole (18)
The rotary drums (14) and (15) are press-fitted into the drum, and the interval between the lower rotary drum (15) and the upper rotary drum (14) is adjusted.
磁気記録媒体(19)は、外枠回転ドラム(17)の内
周面に周方向に延在して設けた断面略矩形状の円環状溝
(20)と前記回転ドラム<14) 、 (15)の間
に、これら回転ドラム(14) 、 (15)の外周面
に沿って巻き付ける。そして、磁気記録媒体(19)の
両端部を上記外枠回転ドラム(17)の周面に設けたス
リット(20) 、 (20)より外方へ引き出し、こ
のスリット(20) 、 (20)の近傍に設けた粘着
テープ(21)に貼着して固定する。なお、磁気記録媒
体(19)の回転ドラム(14)、(15)への巻き付
けは、上記外枠回転ドラム(17)の周面に周方向に適
当な間隔で設けた窓部(22)より挿入して行う。The magnetic recording medium (19) has an annular groove (20) with a substantially rectangular cross section provided extending in the circumferential direction on the inner peripheral surface of the outer frame rotating drum (17) and the rotating drum (14), (15). ) along the outer peripheral surfaces of these rotating drums (14) and (15). Then, both ends of the magnetic recording medium (19) are pulled out through slits (20), (20) provided on the circumferential surface of the outer frame rotating drum (17), and the slits (20), (20) are It is fixed by pasting it on the adhesive tape (21) provided nearby. The magnetic recording medium (19) is wound around the rotating drums (14) and (15) through windows (22) provided at appropriate intervals in the circumferential direction on the circumferential surface of the outer frame rotating drum (17). Insert it.
上記構成の電磁変換特性測定機においては、やはり前述
の実施例の測定機と同様に、磁気記録媒体(19)は回
転ドラム(14) 、 (15)への巻き付は部では固
定ヘッド(2)の突き出しに対してドラム(14)(1
5)より逃げる方向に浮くようになっており、不用意な
固定へッF (2)の突き出しに対して、該固定ヘッド
(2)の前記磁気記録媒体(19)へのダメージが回避
されるようになっている。また、このときの固定ヘッド
(2)と磁気記録媒体(19)は、実際のビデオテープ
レコーダ等におけるヘッドと磁気テープの接触形態と同
じ接触形態がとられ、実際のビデオテープレコーダと同
様の当たり特性が得られ、より実際に近い形で電磁変換
特性を評価することができる。In the electromagnetic conversion characteristic measuring device having the above configuration, similarly to the measuring device of the above-described embodiment, the magnetic recording medium (19) is wound around the rotating drums (14) and (15) in part by the fixed head (2). ) against the protrusion of the drum (14) (1
5) It is designed to float in the direction of escape, thereby avoiding damage to the magnetic recording medium (19) of the fixed head (2) due to inadvertent protrusion of the fixed head (2). It looks like this. In addition, the fixed head (2) and the magnetic recording medium (19) at this time are in the same contact form as the head and magnetic tape in an actual video tape recorder, etc., and the contact is similar to that in an actual video tape recorder. The characteristics can be obtained, and the electromagnetic conversion characteristics can be evaluated in a form that is closer to reality.
(発明の効果〕
以上の説明からも明らかなように、本発明の電磁変換特
性測定機においては、所定の間隙をもって突き合わされ
た回転ドラムの外周面に巻き付けられる磁気記録媒体に
、該回転ドラムの内側より上記間隙を通して磁気ヘッド
を摺接させるように構成されているため、磁気ヘッドの
突き出しに対して磁気記録媒体が回転ドラムから浮くよ
うになっており、不用前な磁気へノドの突き出しに対し
て磁気記録媒体へのダメージを回避することができる。(Effects of the Invention) As is clear from the above description, in the electromagnetic conversion characteristic measuring device of the present invention, the magnetic recording medium that is wound around the outer peripheral surface of the rotating drums that are abutted against each other with a predetermined gap is Since the magnetic head is configured to slide into contact from the inside through the above gap, the magnetic recording medium floats from the rotating drum when the magnetic head protrudes, and the magnetic recording medium is prevented from protruding into the magnetic field when not in use. damage to the magnetic recording medium can be avoided.
また、本発明の電磁変換特性測定機においては、磁気ヘ
ッドと磁気記録媒体との接触状態が実際のビデオテープ
レコーダのヘッドと媒体との接触形態と同しになるため
、実際により近い状態で電磁変換特性を測定することが
でき、磁気記録媒体及び磁気ヘッドの正確な電磁変換特
性の評価が行える。In addition, in the electromagnetic conversion characteristic measuring device of the present invention, the contact state between the magnetic head and the magnetic recording medium is the same as the contact state between the head and the medium of an actual video tape recorder, so the electromagnetic conversion characteristics measurement device can measure the electromagnetic characteristics in a state closer to the actual state. The conversion characteristics can be measured, and the electromagnetic conversion characteristics of magnetic recording media and magnetic heads can be accurately evaluated.
さらに、本発明の!磁変換特性測定機においては、磁気
記録媒体の回転ドラムへの取付けが極めて容易であり、
該磁気記録媒体の交換に要する手間が少なくて済むとと
もに、その取付は構造も簡素化できる。Furthermore, the present invention! In the magnetic conversion characteristic measuring machine, it is extremely easy to attach the magnetic recording medium to the rotating drum.
The effort required to replace the magnetic recording medium can be reduced, and the mounting structure can be simplified.
第1図は本発明を適用した電磁変換特性測定機の一例を
示す斜視図であり、第2回は回転ドラムの一例を示す分
解斜視図であり、第3図は回転ドラムの要部断面図であ
り、第4図は磁気記録媒体を回転ドラムに巻き付けた状
態の斜視図であり、第5図は上回転ドラムを外した状態
の平面図であり、第6図は磁気記録媒体に固定へノドを
接触させた状態の要部断面図であり、第7図は固定ヘッ
ドと磁気記録媒体との接触状態を示す模式図である。
第8図及び第9図は回転ドラムの他の例を示し、第8図
は回転ドラムの斜視図であり、第9図はこの回転ドラム
に巻き付けられた磁気記録媒体に固定ヘッドが接触して
いる状態を示す要部断面図である。
第10図及び第11図は従来のilt磁変換特性測定機
の一例を示し、第10図は斜視図であり、第11図は要
部断面図である。
第12図及び第13図は従来の電磁変換特性測定機にお
ける磁気記録媒体の回転ドラムへの固定方法の例を示し
、第12図はバネで磁気記録媒体を固定した状態の平面
図、第13図はエアーの吸引により固定した状態の平面
図である。
・上回転ドラム
・下回転ドラム
・支持部材
・・磁気記録媒体(磁気テープ)Fig. 1 is a perspective view showing an example of an electromagnetic conversion characteristic measuring device to which the present invention is applied, Fig. 2 is an exploded perspective view showing an example of a rotating drum, and Fig. 3 is a sectional view of the main parts of the rotating drum. Fig. 4 is a perspective view of the magnetic recording medium wound around the rotating drum, Fig. 5 is a plan view of the upper rotating drum removed, and Fig. 6 is a perspective view of the magnetic recording medium wound around the rotating drum. FIG. 7 is a cross-sectional view of the main part in a state where the throats are in contact with each other, and FIG. 7 is a schematic diagram showing the state of contact between the fixed head and the magnetic recording medium. 8 and 9 show other examples of rotating drums, FIG. 8 is a perspective view of the rotating drum, and FIG. 9 shows a fixed head in contact with a magnetic recording medium wound around the rotating drum. FIG. 10 and 11 show an example of a conventional ILT magnetic conversion characteristic measuring device, with FIG. 10 being a perspective view and FIG. 11 being a sectional view of a main part. 12 and 13 show an example of a method of fixing a magnetic recording medium to a rotating drum in a conventional electromagnetic conversion characteristic measuring machine, FIG. 12 is a plan view of the magnetic recording medium fixed with a spring, and FIG. The figure is a plan view of a state in which it is fixed by air suction.・Upper rotating drum ・Lower rotating drum ・Supporting member...Magnetic recording medium (magnetic tape)
Claims (1)
合わされてなり、これら回転ドラムの外周面に巻き付け
られる磁気記録媒体に該回転ドラムの内側より上記間隙
を通して磁気ヘッドが摺接して電磁変換特性を測定する
ことを特徴とする電磁変換特性測定機。An upper rotating drum and a lower rotating drum are butted against each other with a predetermined gap, and a magnetic head slides into contact with the magnetic recording medium wound around the outer peripheral surface of these rotating drums from the inside of the rotating drum through the gap to measure electromagnetic conversion characteristics. An electromagnetic conversion characteristic measuring device characterized by:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21818090A JPH04102217A (en) | 1990-08-21 | 1990-08-21 | Electromagnetic transform characteristic measuring machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21818090A JPH04102217A (en) | 1990-08-21 | 1990-08-21 | Electromagnetic transform characteristic measuring machine |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04102217A true JPH04102217A (en) | 1992-04-03 |
Family
ID=16715869
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21818090A Pending JPH04102217A (en) | 1990-08-21 | 1990-08-21 | Electromagnetic transform characteristic measuring machine |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04102217A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1298593C (en) * | 2001-03-15 | 2007-02-07 | 株式会社吴羽 | Packing container |
US8054577B2 (en) * | 2006-04-07 | 2011-11-08 | International Business Machines Corporation | Tape roller guide with integral recording head |
-
1990
- 1990-08-21 JP JP21818090A patent/JPH04102217A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1298593C (en) * | 2001-03-15 | 2007-02-07 | 株式会社吴羽 | Packing container |
KR100781305B1 (en) * | 2001-03-15 | 2007-11-30 | 가부시키가이샤 쿠레하 | Container for package |
US8054577B2 (en) * | 2006-04-07 | 2011-11-08 | International Business Machines Corporation | Tape roller guide with integral recording head |
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