JPH05282616A - Magnetic recording and reproducing element and recorder using this element - Google Patents

Abstract

PURPOSE:To improve externally induced noise by providing a shielding case formed in a window width to a specific length and magnetic cores having a slope formed in the contact angle with a magnetic tape to a specific angle or below. CONSTITUTION:The magnetic shielding case 11 is formed to in the window width W of the case to the 3+ or -1mm range. The magnetic cores 10a, 10b are formed to slopes in such a manner that the respective peaks attain <=20 deg. contact angle theta1. The induced noise is proportional to the window width and the contour (shape effect) is inversely proportional to the window width. The contour can be reduced to 1/2 to 1/5 within the 2 to 4mm range of the window width W of the case if there are such slopes as to decrease the contact angle of the tape and the cores. Grooves for improving the shape effect may be worked in a track width direction after the surface for sliding with a magnetic head is R worked and may be worked to the shape which have the same groove shape in an initial period with the magnetic cores alone. As a result, the externally induced noise is improved without increasing the production cost and without deteriorating the shape effect characteristic.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は磁気記録再生素子およ
びこれを用いた記録装置、特に磁気媒体に情報を記録し
たり再生したりする磁気記録再生装置の電磁変換素子に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing element and a recording apparatus using the same, and more particularly to an electromagnetic conversion element of a magnetic recording / reproducing apparatus for recording and reproducing information on a magnetic medium.

【０００２】[0002]

【従来の技術】図３は従来例の電磁変換素子、特に外部
誘導ノイズ改善ヘッド（以下磁気ヘッドという）の窓幅
を小さくした状態を示す側断面図、図４は従来例の窓幅
が大きい状態を示す斜視図である。2. Description of the Related Art FIG. 3 is a side sectional view showing a state in which a window width of a conventional electromagnetic conversion element, particularly an external induction noise improving head (hereinafter referred to as a magnetic head) is reduced, and FIG. 4 is a conventional example having a large window width. It is a perspective view showing a state.

【０００３】図３において、１０ａ，１０ｂはそれぞれ
電磁変換用の磁気コア、１１はケース窓幅Ｗを小さくし
た磁気シールドケース、１２は磁気テープ、１３ａ，１
３ｂはそれぞれ磁気コア１０ａ，１０ｂのそれぞれを保
持するコアホルダ、１４は電磁変換用コイル線、θ₂ は
磁気テープ１２と磁気コア１０ａ，１０ｂそれぞれの接
触角である。In FIG. 3, 10a and 10b are magnetic cores for electromagnetic conversion, 11 is a magnetic shield case having a small case window width W, 12 is a magnetic tape, and 13a and 1a.
3b is a core holder for holding each of the magnetic cores 10a and 10b, 14 is a coil wire for electromagnetic conversion, and θ ₂ is a contact angle between the magnetic tape 12 and the magnetic cores 10a and 10b.

【０００４】図４において、１は磁気ヘッド、２は磁気
テープをガイドするテープガイド、３はヘッドを取付け
するヘッド取付足、４は磁気コア、５は遮断板、６は凹
溝、７はシールド板（後述）、Ｗはシールドケース窓幅
（後述）である。In FIG. 4, 1 is a magnetic head, 2 is a tape guide for guiding a magnetic tape, 3 is a head mounting leg for mounting the head, 4 is a magnetic core, 5 is a blocking plate, 6 is a groove, and 7 is a shield. A plate (described later) and W are a shield case window width (described later).

【０００５】従来、図４の従来例に示すように、磁気シ
ールドケースの窓幅Ｗは約５mmであり、磁気テープ走行
面はＲ形状やハイパブリック形状に構成されており、外
部誘導ノイズを改善するためにヘッド外周又はヘッド端
子露出面にシールド板７を配設していた。Conventionally, as shown in the conventional example of FIG. 4, the window width W of the magnetic shield case is about 5 mm, and the magnetic tape running surface is formed in an R shape or a high public shape to improve external induction noise. To this end, the shield plate 7 is arranged on the outer circumference of the head or the exposed surface of the head terminal.

【０００６】この外部誘導ノイズを改善するために、図
３に示すようにシールドケースの窓幅Ｗを小さくすると
磁気コア１０ａ，１０ｂそれぞれのシールドケース窓１
１と対向する斜面Ａ₁ が急になり、磁気コアと磁気テー
プの接触角θ₂ が大きくなる。In order to improve this externally induced noise, if the window width W of the shield case is reduced as shown in FIG. 3, the shield case window 1 of each of the magnetic cores 10a and 10b is reduced.
The slope A ₁ facing ₁ becomes steep, and the contact angle θ ₂ between the magnetic core and the magnetic tape becomes large.

【０００７】[0007]

【発明が解決しようとする課題】以上のように、前記従
来例では、外部誘導ノイズ特性を改善するためになされ
た図４のシールド板の配設のために部品点数が増え、部
品費，組立費等のコストアップにつながるという課題が
あった。次に外部誘導ノイズを改善するためにシールド
ケースの窓幅Ｗを小さくすると、図３に示すように磁気
コア１０ａ，１０ｂのケース窓と対向する斜面Ａ₂ の角
度が急になるため、磁気コアと磁気テープとの接触角θ
₂ が大きくなり、形状効果が悪くなってしまうという課
題があった。As described above, in the above-mentioned conventional example, the number of parts is increased due to the arrangement of the shield plate shown in FIG. 4 for improving the externally induced noise characteristic, resulting in an increase in parts cost and assembly. There was a problem that it would lead to higher costs such as expenses. Next, when the window width W of the shield case is reduced in order to improve the externally induced noise, the angle of the slope A ₂ facing the case windows of the magnetic cores 10a and 10b becomes steep as shown in FIG. Angle θ between the magnetic tape and
There was a problem that ₂ became large and the shape effect deteriorated.

【０００８】この発明は上記のような課題を解決するた
めになされたもので、製造コストを上昇させず、形状効
果特性を劣化させないで、外部誘導ノイズを改善するこ
とを目的とする。The present invention has been made to solve the above problems, and an object thereof is to improve external induction noise without increasing the manufacturing cost and deteriorating the shape effect characteristics.

【０００９】[0009]

【課題を解決するための手段】このため、この発明の請
求項１においては、窓幅を３±１mmとしたシールドケー
スと、磁気テープとの接触角を２０度以下に形成した斜
面を有する磁気コアと、を具備して成る磁気記録再生素
子により、前記課題を解決し、前記目的を達成しようと
するものである。For this reason, in claim 1 of the present invention, a magnetic shield having a window width of 3 ± 1 mm and a magnetic surface having a slope formed with a contact angle with the magnetic tape of 20 degrees or less is provided. A magnetic recording / reproducing element including a core is intended to solve the above problems and achieve the above objects.

【００１０】また、この発明の請求項２においては、請
求項１記載の磁気記録再生素子を用いて成る記録装置に
より、前記課題を解決し、前記目的を達成しようとする
ものである。According to a second aspect of the present invention, the recording apparatus including the magnetic recording / reproducing element according to the first aspect solves the above problems and achieves the above object.

【００１１】[0011]

【作用】この発明の磁気記録再生素子はシールドケース
の窓幅を３±１mmとし、磁気コアと磁気テープとの接触
角を２０度以下に形成した斜面を有することにより、形
状効果（以下コンターという）を小さくする（図５参
照）。In the magnetic recording / reproducing element of the present invention, the window width of the shield case is 3 ± 1 mm, and the inclined surface is formed so that the contact angle between the magnetic core and the magnetic tape is 20 degrees or less. ) Is reduced (see FIG. 5).

【００１２】[0012]

【実施例】以下、この発明の実施例を図面に基づいて説
明する。Embodiments of the present invention will be described below with reference to the drawings.

【００１３】図１はこの発明の一実施例である磁気記録
再生素子の側断面図、図２はこの実施例の磁気記録再生
素子を示す図であり、（ａ）は側面図、（ｂ）は正面図
である。図５は磁気記録再生素子のケース窓幅およびコ
ンターと誘導ノイズの関係を示すグラフである。FIG. 1 is a side sectional view of a magnetic recording / reproducing element according to an embodiment of the present invention, FIG. 2 is a diagram showing the magnetic recording / reproducing element of this embodiment, (a) is a side view, and (b) is a side view. Is a front view. FIG. 5 is a graph showing the relationship between the case window width and contour of the magnetic recording / reproducing element and the induced noise.

【００１４】図中、前記従来例の符号と同一符号は同一
又は相当部分を示し、一部重複して説明する。In the figure, the same reference numerals as those used in the conventional example indicate the same or corresponding portions, and the description will be partially repeated.

【００１５】図１において、１１はケース窓幅Ｗを３±
１mmの範囲にした磁気シールドケース、１０ａ，１０ｂ
それぞれは電磁変換用の磁気コア、１２は磁気テープ、
１３ａ，１３ｂそれぞれは磁気コアを保持するコアホル
ダ、１４は電磁変換用コイル線である。θ₁ は磁気テー
プ１２と磁気コア１０ａ，１０ｂそれぞれとの接触角で
あり、磁気コア１０ａ，１０ｂそれぞれの頂部を前記接
触角θ₁ が２０度以下になるようにした斜面である。In FIG. 1, 11 is a case window width W of 3 ±.
Magnetic shield case in the range of 1 mm, 10a, 10b
Each is a magnetic core for electromagnetic conversion, 12 is a magnetic tape,
Each of 13a and 13b is a core holder for holding a magnetic core, and 14 is a coil wire for electromagnetic conversion. θ ₁ is the contact angle between the magnetic tape 12 and each of the magnetic cores 10a and 10b, and the top of each of the magnetic cores 10a and 10b is an inclined surface such that the contact angle θ ₁ is 20 degrees or less.

【００１６】次に、この実施例で動作した場合の磁気記
録再生素子のケース窓幅とコンター（形状効果）と誘導
ノイズの関係について図５を用いて説明する。Next, the relationship between the case window width of the magnetic recording / reproducing element, the contour (shape effect) and the induced noise when operating in this embodiment will be described with reference to FIG.

【００１７】図５において、Ｂ₁ は誘導ノイズ（ｄＢ
_v ，斜面有無共）の特性曲線、Ｂ₂ は従来例の斜面無し
のときの特性曲線、Ｂ₃ は斜面有りのときの特性曲線図
である。In FIG. 5, B ₁ is the induced noise (dB
_{v is} a characteristic curve (with or without slope), B ₂ is a characteristic curve without a slope in the conventional example, and B ₃ is a characteristic curve diagram with a slope.

【００１８】図５からもわかるように、誘導ノイズは窓
幅に比例し、コンター（形状効果）は窓幅に反比例して
いる。さらに、テープとコアとの接触角を小さくするよ
うな斜面がある場合、ケース窓幅が２〜４mmの範囲内
で、コンターを１／２〜１／５に小さくすることができ
る。As can be seen from FIG. 5, the induced noise is proportional to the window width, and the contour (shape effect) is inversely proportional to the window width. Further, when there is a slope that reduces the contact angle between the tape and the core, the contour can be reduced to 1/2 to 1/5 within the case window width of 2 to 4 mm.

【００１９】なお、形状効果を改善するための溝は、磁
気ヘッド摺動面をＲ加工した後にトラック幅方向に加工
してもよいが、磁気コアのみ凹形状になっていればよい
ので、磁気コア単体で初期に同一溝形状になるような形
に加工しておいてもよい。The groove for improving the shape effect may be processed in the track width direction after R-processing the magnetic head sliding surface, but since only the magnetic core has a concave shape, The core alone may be initially processed into the same groove shape.

【００２０】[0020]

【発明の効果】以上説明したように、この発明では、磁
気ヘッドのシールドケースの窓幅を小さくし、かつ磁気
コアのテープとの接触角を小さくするような斜面をテー
プ出入側に設けることにより、製造コストを上げず、形
状効果特性を劣化させないで、外部誘導ノイズを改善す
ることができる。As described above, according to the present invention, the sloped surface is provided on the tape loading / unloading side to reduce the window width of the shield case of the magnetic head and to reduce the contact angle of the magnetic core with the tape. The external induction noise can be improved without increasing the manufacturing cost and without deteriorating the shape effect characteristic.

【図面の簡単な説明】[Brief description of drawings]

【図１】 この発明の一実施例における磁気記録再生素
子の側断面図FIG. 1 is a side sectional view of a magnetic recording / reproducing element according to an embodiment of the present invention.

【図２】 この実施例の磁気記録再生素子の外観を示す
図FIG. 2 is a diagram showing the appearance of a magnetic recording / reproducing element of this example.

【図３】 従来例の磁気記録再生素子の窓幅を小さくし
た状態を示す側断面図FIG. 3 is a side sectional view showing a state in which the window width of the conventional magnetic recording / reproducing element is made small.

【図４】 従来例の窓幅の大きい状態を示す斜視図FIG. 4 is a perspective view showing a state where the window width of the conventional example is large.

【図５】 磁気記録再生素子の窓幅およびコンターと誘
導ノイズの関係を示すグラフFIG. 5 is a graph showing the relationship between the window width and contour of a magnetic recording / reproducing element and induced noise.

【符号の説明】[Explanation of symbols]

１１ シールドケース １２ 磁気テープ １３ａ，１３ｂ 磁気コアホルダ １４ コイル線 θ₁ ，θ₂ 接触角 Ａ₁ ，Ａ₂ 斜面11 shield case 12 magnetic tape 13a, 13b magnetic core holder 14 coil wire θ ₁ , θ ₂ contact angle A ₁ , A ₂ slope

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 窓幅を３±１mmとしたシールドケース
と、磁気テープとの接触角を２０度以下に形成した斜面
を有する磁気コアと、を具備して成ることを特徴とする
磁気記録再生素子。1. A magnetic recording / reproducing apparatus comprising: a shield case having a window width of 3 ± 1 mm; and a magnetic core having a slope formed with a contact angle with a magnetic tape of 20 degrees or less. element. 【請求項２】 請求項１記載の磁気記録再生素子を用い
て成ることを特徴とする記録装置。2. A recording apparatus comprising the magnetic recording / reproducing element according to claim 1.