JPH0438710A - Permanent magnet type erasing head and magnetizing device for the same - Google Patents
Permanent magnet type erasing head and magnetizing device for the sameInfo
- Publication number
- JPH0438710A JPH0438710A JP14478890A JP14478890A JPH0438710A JP H0438710 A JPH0438710 A JP H0438710A JP 14478890 A JP14478890 A JP 14478890A JP 14478890 A JP14478890 A JP 14478890A JP H0438710 A JPH0438710 A JP H0438710A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- magnetic pole
- magnetizing
- pole part
- magnetic
- 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
- 230000005415 magnetization Effects 0.000 claims abstract description 17
- 230000007423 decrease Effects 0.000 claims description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 210000003128 head Anatomy 0.000 description 14
- 230000004907 flux Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000696 magnetic material Substances 0.000 description 2
- 241000345998 Calamus manan Species 0.000 description 1
- 208000003251 Pruritus Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 235000012950 rattan cane Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は主にオーディオ用などの磁気テープに記録され
たデータの消去に用いられる永久磁石型消去ヘッドと、
その着磁装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a permanent magnet type erasing head used mainly for erasing data recorded on magnetic tapes such as audio tapes;
The present invention relates to the magnetizing device.
従来の技術
一般に永久磁石型消去へ、ラドはテープ走行面の必要部
分に磁石材料を設けた形状で構成され、前記磁石材料に
対面密着するように設けた着磁ヨークおよび着磁コイル
に電流を印加することにより磁界を発生させて着磁を行
う方法をとっており、代表的な従来例について添付図面
を用いて説明する。第６図、第６図は永久磁石型消去ヘ
ッドを着磁する工程を示したものであり、１ず消去ヘッ
ド本体１３に設けた磁石部１４のテープ走行面に対面密
着する形状に加工しだコ字状の着磁ヨーク１６３、Ｘ
を当て、着磁ヨーク１５の一方の磁脚に設けた着磁コイ
ル１６に着磁電源１７を介して電流を印加し第９図、第
１ｏ図に示すように磁界を発生させて消去ヘッドの１磁
石部１４に着磁を行っていた。Conventional technology Generally speaking, permanent magnet type erasing is required, but RAD is constructed with a magnetic material provided on the necessary part of the tape running surface, and a current is applied to a magnetizing yoke and a magnetizing coil that are provided in close contact with the magnetic material. A typical conventional example will be described with reference to the accompanying drawings. Figures 6 and 6 show the process of magnetizing a permanent magnet type erasing head. First, the magnet section 14 provided in the erasing head body 13 is shaped so that it comes into close contact with the tape running surface. A U-shaped magnetizing yoke 163, A magnetic field is generated in this manner to magnetize one magnet portion 14 of the erasing head.
着磁後の磁石部１４の表面状態を第７図’ａ） 、 （
ｂ）に示す。第７図（ａ） ’ｊ： ＠ ［の状態を示
し、この従来例ではテープ走行方向の出口側にテープ走
行に沿って斜め状にＮ極→Ｓ極→Ｎｉ→・・と交番した
構成で、その磁界強度は第７図（ｂ）に示すようにテー
プ走行方向の出口側に向かって漸減するように着磁され
ている。The surface condition of the magnet part 14 after magnetization is shown in Figure 7'a), (
Shown in b). Figure 7 (a) shows the state of 'j: @ [, and in this conventional example, the N poles are alternated diagonally along the tape running direction, such as N pole → S pole → Ni →... on the exit side of the tape running direction. The magnetic field strength is magnetized so as to gradually decrease toward the exit side in the tape running direction, as shown in FIG. 7(b).
このようにテープ走行方向の出口側に漸減交番型の副磁
憧部１８を着磁して後、別工程でテープ走行方向の入口
側に主磁極部１９を、副磁極部１８と同じ要領で着磁し
第８図（＋ａ）で示す磁極の状態ならびに同第８図（ｂ
）で示す磁界の強度に着磁をして製品化されている。After magnetizing the sub magnetic pole part 18 of the gradually decreasing alternating type on the exit side in the tape running direction, the main magnetic pole part 19 is attached to the inlet side in the tape running direction in a separate process in the same manner as the sub magnetic pole part 18. The state of the magnetized magnetic poles shown in Fig. 8 (+a) and the state of the magnetic poles shown in Fig. 8 (b)
) The products are manufactured by magnetizing to the magnetic field strength shown in ).
発明が解決しようとする課題
しかしながら、従来の着磁方法では、２工程に分割して
着磁をするために主意コスト面で不利なことと製品が小
さい上に微細な着磁を必要とすることから、着磁装置の
寸法９作業などのわずかな誤差が着磁状態に悪影響を及
し、製品の性能を劣化させるという品質面の課題も同時
に有しているものとなっていた。Problems to be Solved by the Invention However, in the conventional magnetization method, magnetization is divided into two steps, which is disadvantageous in terms of main cost, and the product is small and requires fine magnetization. Therefore, a slight error in the dimensions of the magnetizing device, etc., has an adverse effect on the magnetized state, resulting in a quality problem in that the performance of the product is degraded.
ま走、この構成では永久磁石型消去ヘッドの基本性能で
ある消去率を安定させるために、主磁極部１９の磁界強
度を大きくしようとすると、副磁極部１８に着磁した磁
極ならびに磁界強度に影響を及し、製品性能を劣化させ
る間頌もあった。However, with this configuration, if you try to increase the magnetic field strength of the main magnetic pole part 19 in order to stabilize the erasure rate, which is the basic performance of a permanent magnet type erase head, the magnetic pole magnetized to the sub magnetic pole part 18 and the magnetic field strength will increase. There were also interludes that affected and degraded product performance.
本発明は以上のような従来の欠点を除去し、品質的に安
定した性能を発揮し、コスト的にも大きく改善可能な永
久磁石型消去ヘッド及びその着磁装置を提供するもので
ある。The present invention eliminates the above-mentioned conventional drawbacks, and provides a permanent magnet type erasing head and its magnetizing device that exhibits stable performance in terms of quality and can be significantly improved in terms of cost.
課題を解決するための手段
上記課題を解決するために本発明Ｉは、主磁極部と副Ｉ
Ｅ６４ｉ部およびテープ走行方向の入口側側面に接する
磁極部を１つの着磁ヨークで構成し、１回の着磁作業で
主磁極部と副磁極部およびテープ走行方向の入口側に主
磁極部に対して０．２以上の磁５、、−
界強度比の反転磁界部の３つの磁極部を同時に設けるＩ
Ｎ ’Ｍにするものである。Means for Solving the Problems In order to solve the above problems, the present invention I has a main magnetic pole part and a sub I
The E64i part and the magnetic pole part in contact with the side surface on the inlet side in the tape running direction are constructed with one magnetizing yoke, and one magnetization operation can separate the main magnetic pole part, the sub magnetic pole part, and the main magnetic pole part on the inlet side in the tape running direction. I provide three magnetic pole parts of the reversal magnetic field part at the same time with a magnetic field strength ratio of 0.2 or more.
This is what makes N'M.
作用
この１１４成により、１回の着磁作業で高いレベルで品
質を安定させると同時にコスト面でも半減が可能となる
。Effect: This 114 structure makes it possible to stabilize the quality at a high level with a single magnetization operation and at the same time reduce the cost by half.
実施例
以下、本発明の一実施例を図面を用いて説明する。第１
図は永久り石型消去ヘッドを着磁する工程を示したもの
であり、消去ヘッド本体１に設けた磁石部２のテープ摺
動面（Ｒ形状部）に着磁処理を行うため、前記テープ摺
動面に相対する形伏の着磁装置を用いる。着磁装置は第
１図で示すごとくテープ摺動面に密着する２木の磁極部
３ａ。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure shows the process of magnetizing a permanent stone type erasing head. A shaped magnetizing device is used that faces the sliding surface. As shown in FIG. 1, the magnetizing device has two magnetic pole parts 3a that are in close contact with the tape sliding surface.
３ｂをもった着磁ヨーク３にテープ走行方向の入口側面
に接する磁極部１１を有する３つの磁極部を一体品で設
けたものであり、第２図（ａ）に記載のテープ走行方向
にγａっで反転磁界部４．主磁極部６、副ｆｆ１ｌｉ部
６を各々独立して構成する目的で、各線（が部１１，３
ａ、３ｂには着磁コイル７．８６７．７
９を設け、このフィル７〜９を直列に接続し着磁電源１
ｏより電流を印加し着磁を行うようにしている。着磁後
の磁石部２０表面状態を第２図（ａ）。A magnetizing yoke 3 having a magnetization yoke 3b is integrally provided with three magnetic pole parts including a magnetic pole part 11 in contact with the entrance side surface in the tape running direction. The reversal magnetic field section 4. For the purpose of configuring the main magnetic pole part 6 and the sub ff1li part 6 independently, each wire (the part 11, 3
Magnetizing coils 7,867,79 are provided in a and 3b, and these filters 7 to 9 are connected in series to the magnetizing power source 1.
Magnetization is performed by applying a current from the point o. FIG. 2(a) shows the surface state of the magnet portion 20 after magnetization.
（ｂ）で示す。第２図（ａ）は磁極の状態を示し、テー
プ走行方向に沿って反転磁界部４．主ｍｉ部６．副ｌａ
瞳部６０組合せにしている。その磁界の強度は第２図（
１））に示すように■方向にＮ極戎分が、０方向にＳ極
成分が発生する状態になる。本発明による永久磁石型消
去ヘッドの着磁装置は主磁極部６と副Ｂ＆甑部６を同時
に着磁し、かつ安定した性能を引出すために第２図（ａ
）で示す反転磁界部４を得るために第１図で示すように
テープ走行方向の入口側側面に接する着磁ヨーク３の磁
極部１１を設けた構造にしている。こうすることにより
、着磁の際の磁束の流れは第３図で示すように主磁極部
５から反転磁界部４へ流れる磁束の流れ１２が新たに発
生するために、主磁極部６の磁界強度は高いレベルで安
定することが可能になる。参考に従来例の着磁の際の磁
束の流れを第９図と第１０図で示す。従来は着磁工程１
で副磁極部を着磁し磁束の流れは第９図のようになり、
次の工程で主磁極部を着磁し、磁束の流れは第１０図の
ようになっていた。なお、本発明による反転磁界部４の
磁界強度比Ｂ／Ａば、第２図（ｂ）で示す反転磁界部磁
界強度Ｂを王滋庵部磁界強度Ａで割った比率で表わし、
第３図で示すように０．２以上の範囲の磁界強度比に設
定すれｉず品゛Ｕ的に安定することを確認した。Shown in (b). FIG. 2(a) shows the state of the magnetic poles, showing the reversal magnetic field portion 4. along the tape running direction. Main mi part 6. deputy la
There are 60 combinations of pupil parts. The strength of the magnetic field is shown in Figure 2 (
As shown in 1)), a state is reached in which an N-pole component occurs in the ■ direction and a S-pole component occurs in the 0 direction. The magnetizing device for the permanent magnet erase head according to the present invention magnetizes the main magnetic pole part 6 and the sub-B &
) In order to obtain the reversal magnetic field portion 4 shown in FIG. 1, a magnetic pole portion 11 of the magnetizing yoke 3 is provided in contact with the side surface on the entrance side in the tape running direction. By doing this, the flow of magnetic flux during magnetization is as shown in FIG. The strength can be stabilized at a high level. For reference, the flow of magnetic flux during magnetization in a conventional example is shown in FIGS. 9 and 10. Conventionally, magnetization process 1
The sub magnetic pole part is magnetized and the flow of magnetic flux is as shown in Figure 9.
In the next step, the main magnetic pole was magnetized, and the flow of magnetic flux was as shown in Figure 10. In addition, the magnetic field strength ratio B/A of the reversal magnetic field section 4 according to the present invention is expressed as the ratio of the reversal magnetic field section magnetic field strength B divided by the Ojian section magnetic field strength A shown in FIG. 2(b),
As shown in FIG. 3, it was confirmed that the product was stable even if the magnetic field strength ratio was set in a range of 0.2 or more.
発明の効果
以ｔのように本発明の永久磁石型消去ヘッドおよびその
着磁装置は構成されるため、テープ走行方向の入口側に
、主磁極部に対して０．２以上の磁界強度比の反転磁界
部を設けることにより消去率を始めとした総合性能およ
び品質の大幅な向上が図れるとともに着磁作業も１回で
完了することが可能なため、コスト面でも半減するなど
の効果が得られ、産業的ｇｆＩ（ｌｆＯ犬なるものであ
る。Effects of the Invention Since the permanent magnet erasing head and its magnetizing device of the present invention are constructed as described above, a magnetic field strength ratio of 0.2 or more to the main magnetic pole is provided on the inlet side in the tape running direction. By providing a reversal magnetic field section, the overall performance and quality including the erasure rate can be significantly improved, and the magnetization work can be completed in one time, resulting in costs such as being halved. , an industrial gfI (lfO dog).
第１図は本発明による永久磁石型消去ヘッドの着磁装置
の一実施ｌ！Ａ］を示す正面図、第２図（ａ、 （ｂ）
はそれによって得られる永久磁石型消去ヘッドの着磁の
状態を示す説明図、第３図は本発明の着磁装置により発
生する磁束の流れを示した説明図、第４図は本発明の反
転＠痒部の磁界強度比と消去率との特性図、第６図、第
６図は従来％Ｊの永久磁石型消去ヘッドの副、主磁籐部
着磁装置の一実施例を示す正面図、第７図（Ｑ 、 （
ｂ） 、第８図Ｃａ） 、 （ｂ）はそれによって得ら
れる永久磁石型消去ヘッドの着磁の状態を示す説明図、
第９図は従来列の副磁極部の着磁装置により発生する磁
束の流れを示した説明図、第１０図は同じ〈従来例の主
磁極部の着磁装置によ多発生する磁束の流れを示した説
明図である。
１・・・・・消去ヘッド本体、２・・・・・磁石部、３
・・・・着磁ヨーク、３ａ 、３ｂ・・・・・・磁ＦＭ
部、４・・・・・反転磁界部、５・・・・・・主Ｉａ極
部、６・・・・・・副磁極部、７〜９・・・・・・着磁
コイル、１０・・・・・着磁電源、１１・・・・・・磁
極部、１２・・・・・・磁束の流れ。
代理人の氏名 弁理士 粟 野 重 孝 ほか１名−８
１）−匂す
を球
球
埴
第
図FIG. 1 shows one embodiment of a magnetizing device for a permanent magnet erase head according to the present invention! Front view showing [A], Figure 2 (a, (b)
is an explanatory diagram showing the state of magnetization of the permanent magnet erase head obtained thereby, FIG. 3 is an explanatory diagram showing the flow of magnetic flux generated by the magnetizing device of the present invention, and FIG. @Characteristic diagram of the magnetic field strength ratio and erasure rate of the itchy area, Fig. 6, Fig. 6 is a front view showing an example of the sub and main magnetic rattan part magnetizing device of the conventional %J permanent magnet type erasing head. , Figure 7 (Q, (
b) , FIG. 8 Ca) , (b) is an explanatory diagram showing the state of magnetization of the permanent magnet type erasing head obtained thereby;
Fig. 9 is an explanatory diagram showing the flow of magnetic flux generated by the magnetizing device of the sub-pole section of the conventional row, and Fig. 10 is an explanatory diagram showing the flow of magnetic flux generated by the magnetizing device of the main pole section of the conventional example. FIG. 1... Erasing head body, 2... Magnet part, 3
...Magnetizing yoke, 3a, 3b...Magnetic FM
Part, 4... Reversal magnetic field part, 5... Main Ia pole part, 6... Sub magnetic pole part, 7-9... Magnetizing coil, 10... ... Magnetizing power supply, 11 ... Magnetic pole part, 12 ... Magnetic flux flow. Name of agent: Patent attorney Shigetaka Awano and 1 other person-8
1) - Smell the ball and ball diagram
Claims (2)
方向の入口側に主磁極部を、出口側に斜め状に構成しテ
ープ走行方向に沿ってＮ極→Ｓ極→Ｎ極→・・・と交番
し、且つ各々の磁極の磁界強度がテープ入口側では強く
、出口側では弱い漸減交番型の副磁極部を各々独立して
設け、上記主磁極部に対してテープ走行方向の入口側に
０．２以上の磁界強度比の反転磁界部を着磁により設け
た永久磁石型消去ヘッド。(1) The main magnetic pole part is formed in the magnet section incorporated in the erase head main body on the entrance side in the tape running direction, and the main magnetic pole part is arranged obliquely on the exit side, so that the main magnetic pole part is formed obliquely on the exit side in the tape running direction, from N pole → S pole → N pole →... Alternating alternating magnetic poles are provided, and the magnetic field strength of each magnetic pole is strong on the tape entrance side and gradually decreases on the exit side. A permanent magnet erasing head that is provided with a reversal magnetic field portion with a magnetic field strength ratio of 0.2 or more by magnetization.
永久磁石型消去ヘッドのテープ走行面に密着するような
２つの磁極部を設けた着磁ヨークに、この永久磁石型消
去ヘッドのツープ走行方向の入口側側面に接する磁極部
を設け、上記着磁ヨークのそれぞれの磁極部に着磁コイ
ルを設け、これらの着磁コイルに電流を印加し、テープ
走行方向入口側に主磁極部に対して０．２以上の磁界強
度比の反転磁界部を着磁するようにした永久磁石型消去
ヘッドの着磁装置。(2) The permanent magnet erase head has a magnet section on the tape running surface of the erase head body. A magnetic pole part is provided in contact with the side surface on the entrance side in the tape running direction, a magnetizing coil is provided in each magnetic pole part of the magnetizing yoke, a current is applied to these magnetizing coils, and a main magnetic pole part is provided on the entrance side in the tape running direction. A magnetizing device for a permanent magnet erasing head, which magnetizes a reversal magnetic field portion having a magnetic field strength ratio of 0.2 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14478890A JPH0438710A (en) | 1990-06-01 | 1990-06-01 | Permanent magnet type erasing head and magnetizing device for the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14478890A JPH0438710A (en) | 1990-06-01 | 1990-06-01 | Permanent magnet type erasing head and magnetizing device for the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0438710A true JPH0438710A (en) | 1992-02-07 |
Family
ID=15370464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14478890A Pending JPH0438710A (en) | 1990-06-01 | 1990-06-01 | Permanent magnet type erasing head and magnetizing device for the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0438710A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0710638A (en) * | 1993-03-02 | 1995-01-13 | Korea Advanced Inst Of Sci Technol | Oxide piezoelectric material |
| US5605648A (en) * | 1994-12-28 | 1997-02-25 | Nippon Soken Inc. | Piezoelectric ceramic |
-
1990
- 1990-06-01 JP JP14478890A patent/JPH0438710A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0710638A (en) * | 1993-03-02 | 1995-01-13 | Korea Advanced Inst Of Sci Technol | Oxide piezoelectric material |
| US5605648A (en) * | 1994-12-28 | 1997-02-25 | Nippon Soken Inc. | Piezoelectric ceramic |
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