JPS6331207Y2 - - Google Patents

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Publication number
JPS6331207Y2
JPS6331207Y2 JP18696281U JP18696281U JPS6331207Y2 JP S6331207 Y2 JPS6331207 Y2 JP S6331207Y2 JP 18696281 U JP18696281 U JP 18696281U JP 18696281 U JP18696281 U JP 18696281U JP S6331207 Y2 JPS6331207 Y2 JP S6331207Y2
Authority
JP
Japan
Prior art keywords
core
erasing
erasing head
tape
spacer
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
Application number
JP18696281U
Other languages
Japanese (ja)
Other versions
JPS5890522U (en
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 filed Critical
Priority to JP18696281U priority Critical patent/JPS5890522U/en
Publication of JPS5890522U publication Critical patent/JPS5890522U/en
Application granted granted Critical
Publication of JPS6331207Y2 publication Critical patent/JPS6331207Y2/ja
Granted legal-status Critical Current

Links

Description

【考案の詳細な説明】 本考案は消去ヘツドに係り、特に高抗磁力テー
プ(メタルテープ)に適用されて、センターコア
とサイドコアを有する消去ヘツドのコアを一体状
に成形してセンターコアとサイドコア間の各ギヤ
ツプ部にスペーサーを挿入し、総じて4ギヤツプ
構造を有するコアとなし、サイドコア部の巻線を
互いに逆巻にして、消去コアの磁気回路における
磁界の干渉によるロスを防止し、消去効率を向上
させうる交流消去法による消去ヘツドを提供する
ことを目的とするものである。
[Detailed description of the invention] The present invention relates to an erasing head, and is particularly applicable to high coercive force tapes (metal tapes). A spacer is inserted into each gap in between, creating a core with a 4-gap structure in total, and the windings of the side core are reversely wound to prevent loss due to magnetic field interference in the magnetic circuit of the erase core, improving erase efficiency. The object of the present invention is to provide an erasing head using the AC erasing method, which can improve the quality of the data.

従来の消去ヘツドとしては、第1図に示すもの
があつた。図において従来の高抗磁力テープ用消
去ヘツド1はC字型コア2と、コイル4を巻線し
たボビン5に挿通してなるI字型コア3を備え、
C字型コア、I字型コアを接合して、コア3の先
端両側面3a,3bに一対のギヤツプ6a,6b
を形成している。しかるにこの従来消去ヘツド1
ではコア部をC字型コア2とI字型コア3とに2
分割したものであるため、巻線工程としてはコイ
ル4を巻装されたコイル5の穴部にI字型コア3
を挿通するのみであるから巻線を簡単に整例状態
に行なうことができる利点はあるものの、C字型
コア2とI字型コア3のフエライトコア素材を必
要とし、結果的に2部材のコア型材を要し、コス
ト的に一体構造のフエライトコア型材よりも不利
となつている。加えて、この二部材接合型コアを
有する消去ヘツドはコアの接合面で漏れ磁束が発
生し、消去ロスを生じるとともに、コア製作上各
コア型材の寸法精度が巌しく要求されこの点から
も生産上コスト上昇を含んだ要因となつている。
A conventional erasing head is shown in FIG. In the figure, a conventional erasing head 1 for high coercive magnetic tape includes a C-shaped core 2 and an I-shaped core 3 inserted through a bobbin 5 on which a coil 4 is wound.
A C-shaped core and an I-shaped core are joined, and a pair of gaps 6a, 6b are formed on both sides 3a, 3b of the tip of the core 3.
is formed. However, this conventional erasing head 1
Now, the core part is divided into C-shaped core 2 and I-shaped core 3.
Since the coil is divided into parts, the I-shaped core 3 is inserted into the hole of the coil 5 where the coil 4 is wound.
Although there is an advantage in that the winding can be easily made in a regular state because the wires are simply inserted, it requires ferrite core materials for the C-shaped core 2 and the I-shaped core 3, and as a result This method requires a core material, which is disadvantageous in terms of cost compared to a ferrite core material having an integral structure. In addition, the erasing head with this two-component joint type core generates leakage magnetic flux at the joint surface of the core, causing erasure loss, and the dimensional accuracy of each core material is required in manufacturing the core, which also makes production difficult. These factors include an increase in costs.

本考案は上記欠点を除去したものであり、以下
図面とともにその実施例につき説明する。
The present invention eliminates the above-mentioned drawbacks, and embodiments thereof will be described below with reference to the drawings.

第2図は本考案になる消去ヘツドの基本的構成
を示す概略図であり、第3図は本考案消去ヘツド
の全体を示す分解斜視図で、第4図は本考案消去
ヘツドに使用されるギヤツプスペーサーの実施例
を示す拡大斜視図である。
Fig. 2 is a schematic diagram showing the basic structure of the erasing head of the invention, Fig. 3 is an exploded perspective view showing the whole erasing head of the invention, and Fig. 4 is a diagram showing the erasing head of the invention. FIG. 2 is an enlarged perspective view showing an embodiment of a gear spacer.

第2図において、消去ヘツド7はセンターコア
9とサイドコア8,8a,8bを一体に成型され
たE字型コアからなり、ギヤツプ部10,11に
はバーマロイからなる磁性体のスペーサー12
a,12bを嵌挿し、全体として4つのギヤツプ
10a,10b,11a,11bを形成するとと
もに巻線14はセンターコアとサイドコアの各間
13a,13bに直列状に巻線され、かつ巻線の
方向はセンターコア9を介して、互いに逆巻とな
るように巻線14a,14bされている構成を基
本とするものである。
In FIG. 2, the erasing head 7 is composed of an E-shaped core formed by integrally molding a center core 9 and side cores 8, 8a, 8b, and gap portions 10, 11 are provided with magnetic spacers 12 made of barmalloy.
a, 12b are fitted and inserted to form four gaps 10a, 10b, 11a, 11b as a whole, and the winding 14 is wound in series between the center core and the side cores 13a, 13b, and the direction of the winding is This is based on a configuration in which wires 14a and 14b are wound in opposite directions with respect to each other via a center core 9.

すなわち本考案になる消去ヘツド7は記録テー
プ進入側と抜け側にそれぞれ複数のギヤツプ10
a,10bと11a,11bを備えたダブルギヤ
ツプ構造の消去ヘツドを並設したのと同様の構成
を施こして、高抗磁力テープの消磁に関し、ダブ
ルギヤツプ消去ヘツドを2回使用したことと同様
の効果を与えることにより、高抗磁力テープの消
磁を行なおうとする考案に係る。
That is, the erasing head 7 according to the present invention has a plurality of gaps 10 on the recording tape entrance side and on the recording tape exit side.
By applying a configuration similar to that of arranging double-gap structure erasing heads with a, 10b and 11a, 11b in parallel, the same effect as using the double-gap erasing head twice in demagnetizing a high coercive force tape can be obtained. This invention relates to a device that attempts to demagnetize a high coercive force tape by providing .

さらに本考案に係る消去ヘツドコアの巻線に関
して説明すると、本考案のコア巻線はテープ進入
側巻線14aと抜け側巻線14bとがセンターコ
ア9を介して直列に巻回接続され、かつ、進入側
巻線14aと抜け側巻線14bの巻線方向は各巻
線によつて誘起される磁束がセンターコア9で互
いに干渉してロスを発生しないよう逆方向に巻線
されている。
Further, to explain the winding of the erasing head core according to the present invention, in the core winding of the present invention, the tape entry side winding 14a and the tape exit side winding 14b are wound and connected in series via the center core 9, and, The winding directions of the incoming winding 14a and the outgoing winding 14b are opposite to each other so that the magnetic fluxes induced by each winding do not interfere with each other in the center core 9 and cause loss.

加えて、巻線の回数に関し、テープ走行に対し
て侵入側の巻数と抜け側の巻数の比と消去効果に
明白な相関関係が見られ、侵入側の巻数が大きい
場合消去効果が劣化する。しかし抜け側の巻数が
大きい場合と同巻数の場合とは消去効果はほぼ同
レベルであることが側定されており、テープ進入
側と抜け側の巻線数による消去特性変化は第5図
に示すグラフのようになつている。第5図のグラ
フにおいて曲線Aは進入側巻線数90回、抜け側巻
線数45回とした場合の消去効果を示し、この場合
消去効果は40dB位で通常要求される消去効果
60dB以上を満足することができない。曲線Bに
おいても同様であることがグラフより判明してい
る。さらに曲線CとDに関して見ると、曲線Cは
テープ進入側と抜け側との巻線数を同数にした場
合であり、曲線Dは進入側よりも抜け側の巻線数
を大きくした場合の消去効果を示し、共にほぼ同
レベル(65dB〜70dB)で必要消去レベル60dB以
上を十分に満足しているものである。
In addition, regarding the number of windings, there is a clear correlation between the erasing effect and the ratio of the number of turns on the intrusion side and the number of turns on the exit side with respect to tape running, and the erasing effect deteriorates when the number of turns on the intrusion side is large. However, it has been determined that the erasing effect is approximately the same when the number of windings on the exit side is large and when the number of windings is the same, and the change in erasing characteristics due to the number of windings on the tape entry and exit sides is shown in Figure 5. It looks like the graph shown. In the graph of Figure 5, curve A shows the cancellation effect when the number of windings on the entering side is 90 and the number of windings on the exit side is 45. In this case, the cancellation effect is about 40 dB, which is usually required.
Unable to satisfy 60dB or higher. It is clear from the graph that the same holds true for curve B. Furthermore, looking at curves C and D, curve C is the case where the number of windings on the tape entry side and tape exit side is the same, and curve D is the case where the number of windings on the tape exit side is larger than the tape entry side. Both of them are at almost the same level (65 dB to 70 dB) and fully satisfy the required erasure level of 60 dB or more.

従つて、これらの結果より消去ヘツド量産時の
工程管理上から、侵入側と抜け側巻線数は同数に
説定しても消去特性は満足できる消去ヘツドが得
られる。尚、この側定の条件としては、テープ速
度4.76cm/s、録音周波数80Hz、消去周波数
100KHzで交流消去したものである。
Therefore, from the viewpoint of process control during mass production of erase heads, it is possible to obtain an erase head with satisfactory erase characteristics even if the number of windings on the entry side and the number of windings on the exit side are assumed to be the same. The conditions for this specification are: tape speed 4.76 cm/s, recording frequency 80 Hz, and erasing frequency.
It is AC erased at 100KHz.

次に、上述の結果から、第3図について、本考
案の具体的実施例につき、その構成及び組付けに
関して説明する。図において、センターコア9と
サイドコア8を有するE字型コアからなる消去ヘ
ツド7はサイドコア間13a,13bに渡つてコ
ア基部7′に、開口部15′を有して1対の金属製
端子16と共に樹脂によりインサート成形された
コイルボビン15をコア基部7′を被覆するよう
に装着し、E字型コアのギヤツプ10,11を通
して巻線14a,14bをそれぞれ逆巻となるよ
うに同巻回数巻線し、巻線端部をコイルボビン1
5に設けた金属製端子16に半田付されて巻線を
完了する。
Next, based on the above results, the structure and assembly of a specific embodiment of the present invention will be explained with reference to FIG. In the figure, an erasing head 7 consisting of an E-shaped core having a center core 9 and side cores 8 has an opening 15' in a core base 7' extending between side cores 13a and 13b, and a pair of metal terminals 16. At the same time, a coil bobbin 15 insert-molded from resin is attached so as to cover the core base 7', and the windings 14a and 14b are wound with the same number of turns so as to be reversely wound through the gaps 10 and 11 of the E-shaped core. Then, attach the winding end to the coil bobbin 1.
It is soldered to the metal terminal 16 provided at 5 to complete the winding.

次にギヤツプ10,11に両面を本案消去ヘツ
ドの消去ギヤツプを形成する厚さ30μmの薄膜材
17で被覆されたパーマロイからなる磁性体のス
ペーサー12a,12bをそれぞれギヤツプ1
0,11に嵌挿固着して本考案の特徴である4ギ
ヤツプ10a,10b,11a,11bを形成す
る。ここにおいてスペーサー12a,12bは高
周波μ特性がフエライトを比較して劣るパーマロ
イを使用しているため、スペーサー12a,12
b部で過電流損による磁化量の飽和からくる発熱
温度上昇が問題となつており、この対策として、
第4図に示すようにスペーサー12a,12bに
それぞれスリツト18a1〜a4,18b1〜b3を設け
てパーマロイスペーサー12a,12bの体積を
減少させラミネート効果を持たせて過電流損低減
を計つている。さらにスリツト18a1〜a4と18
b1〜b3はスペーサー12a,12bを重ねた場
合、スリツト部が合致しないように互いにずらし
た位置に設けられてクロス消去により消去残りは
発生しない。また、テープ侵入側と抜け側に関す
るスペーサー12a,12bのスリツト数として
は、テープ侵入側スペーサー12aに4カ所のス
リツト18a1〜a4を設け、抜け側スペーサー12
bに3カ所のスリツト18b1〜b3を設けている。
これは前記テープ侵入側と抜け側の巻線回数の巻
数比に対応したもので、テープ侵入側にはスペー
サーの断面積が少なくなるように4カ所のスリツ
ト18a1−a4を設けたスペーサー12aとし、抜
け側にはスペーサーの断面積を大きくして磁束密
度を進入側よりも大きくするようにした3カ所の
スリツト18b1〜b3を設けたスペーサー12bと
しているものである。
Next, magnetic spacers 12a and 12b made of permalloy coated on both sides with a thin film material 17 having a thickness of 30 μm to form the erase gap of the erase head of the present invention are attached to the gaps 10 and 11, respectively.
0 and 11 to form four gaps 10a, 10b, 11a, and 11b, which are a feature of the present invention. Here, the spacers 12a, 12b are made of permalloy, which has inferior high frequency μ characteristics compared to ferrite.
In part b, heat generation temperature rise due to saturation of magnetization due to overcurrent loss is a problem, and as a countermeasure to this problem,
As shown in FIG. 4, spacers 12a and 12b are provided with slits 18a 1 to a 4 and 18b 1 to b 3 , respectively, to reduce the volume of permalloy spacers 12a and 12b and provide a laminating effect to reduce overcurrent loss. It's on. Furthermore, slits 18a 1 to a 4 and 18
When the spacers 12a and 12b are overlapped, b1 to b3 are provided at positions shifted from each other so that the slit portions do not coincide with each other, so that no erased residue is generated due to cross erase. Furthermore, as for the number of slits in the spacers 12a and 12b regarding the tape entry side and exit side, the tape entry side spacer 12a has four slits 18a1 to 18a4 , and the exit side spacer 12a has four slits 18a1 to 18a4.
Three slits 18b 1 to b 3 are provided in b.
This corresponds to the ratio of the number of windings on the tape entry side and the tape exit side, and the spacer 12a is provided with four slits 18a 1 -a 4 on the tape entry side so that the cross-sectional area of the spacer is reduced. The spacer 12b is provided with three slits 18b 1 to b 3 on the exit side so that the cross-sectional area of the spacer is increased to make the magnetic flux density larger than on the entrance side.

次に、上記の構成で組みたてられた消去ヘツド
部7はケース体16に挿入され、ケース体16の
窓部19で、案内突起20の先端を押圧しながら
案内されて、ケース体16の基準窓縁部21に消
去ヘツド7の前部上面を接してギヤツプ10a,
10b,11a,11bを突出させた状態で係止
される。ついでケース体16内に消去ヘツド7を
組込んだ後ケース体16後部の開口部(図示せ
ず)を金属端子16を突出させて樹脂により封止
し、封完了後、ケース体16の下部に設けた樹脂
注入口(図示せず)よりケース体16内部に高熱
伝導性の樹脂を注入してケース体16内の消去ヘ
ツド7を固着し、樹脂の固着後、ケース体16の
窓部19より突出した消去ヘツド7の前端部を第
4図点線で区別された各スペーサー12a,12
bの余部12a′,12b′と、窓部19より漏出し
た高熱伝導性樹脂をともに研摩加工を施こして本
考案になる4ギヤツプを有する消去ヘツドを完成
させている。
Next, the erasing head section 7 assembled with the above configuration is inserted into the case body 16, and is guided by the window section 19 of the case body 16 while pressing the tip of the guide protrusion 20. With the front upper surface of the erasing head 7 in contact with the reference window edge 21, the gap 10a,
It is locked with 10b, 11a, and 11b protruding. Next, after the erasing head 7 is assembled into the case body 16, the opening (not shown) at the rear of the case body 16 is sealed with resin with the metal terminal 16 protruding from it. A highly thermally conductive resin is injected into the case body 16 through a resin injection port (not shown) provided to fix the erase head 7 in the case body 16, and after the resin is fixed, the erase head 7 is injected into the case body 16 through the window 19 of the case body 16. The front end of the protruding erase head 7 is connected to each spacer 12a, 12, which is distinguished by dotted lines in FIG.
The remaining portions 12a', 12b' of b and the highly thermally conductive resin leaked from the window 19 are polished to complete the four-gap erasing head of the present invention.

これらから第6図に示すように高抗磁力テープ
に対する従来消去ヘツドと本考案消去ヘツドとの
消去特性を比較してみると、本考案による消去ヘ
ツドは従来消去ヘツドに比し、消去効果は10dB
程向上し、最大消去効果は約70dBとなつている
とともに高調波電流歪率も従来消去ヘツドに比し
てすぐれた特性をもつている。
Comparing the erasing characteristics of the conventional erasing head and the erasing head of the present invention for high coercive tape as shown in Fig. 6, the erasing effect of the erasing head of the present invention was 10 dB higher than that of the conventional erasing head.
The maximum erasing effect is approximately 70 dB, and the harmonic current distortion rate is also superior to that of conventional erasing heads.

従つて、本考案による消去ヘツドは前述したよ
うにコアを一体に形成するとともにセンターコア
とサイドコア間の巻線をE字型コアのギヤツプ部
を通して二カ所に行ない、加えて、各ギヤツプ部
にスペーサーを設けて4ギヤツプ構造からなる構
成とともに、スペーサー部にも過電流損による磁
束のロスや発熱による温度上昇に対する対策を施
こしたものであるから従来消去ヘツドに比して、
コア一体構造であることによりコアが安価であ
り、コア接合面がないため消去電流歪率が良好で
あるとともに高抗磁力テープに対して深い最大消
去効果の得られる消去ヘツドとなつている。
Therefore, in the erasing head according to the present invention, the core is integrally formed as described above, and the winding between the center core and the side cores is carried out in two places through the gap part of the E-shaped core, and in addition, a spacer is provided in each gap part. In addition to the 4-gap structure, the spacer section also takes measures against magnetic flux loss due to overcurrent loss and temperature rise due to heat generation.
Since the core is of an integrated structure, the core is inexpensive, and since there is no core joint surface, the erase current distortion rate is good, and the erase head has a deep maximum erase effect on high coercive force tapes.

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

第1図は従来消去ヘツドの概略図、第2図は本
考案消去ヘツドの概略図、第3図は本考案消去ヘ
ツドの全体を示す分解斜視図、第4図はギヤツプ
スペーサーの実施例を示す拡大斜視図。第5図は
巻線の巻線数をテープ侵入側と抜け側とで変化さ
せた場合の消去特性を示す曲線図、第6図は従来
消去ヘツドと本考案消去ヘツドとの消去特性比軸
曲線図。 7,7……消去ヘツド、8,8a,8b……サ
イドコア、9……センターコア、10,10a,
10b,11,11a,11b……ギヤツプ、1
2,12a,12b……スペーサー、12a′12
b′……スペーサー余部、14a,14b……巻
線、17……薄膜材、18a1〜18a4,18b1
18b3……スリツト。
Fig. 1 is a schematic diagram of a conventional erasing head, Fig. 2 is a schematic diagram of the erasing head of the present invention, Fig. 3 is an exploded perspective view showing the entire erasing head of the present invention, and Fig. 4 is an embodiment of a gear spacer. FIG. Figure 5 is a curve diagram showing the erasing characteristics when the number of turns of the winding is changed between the tape entry side and the tape exit side, and Figure 6 is the erasing characteristic ratio axis curve of the conventional erasing head and the erasing head of the present invention. figure. 7, 7... Erasing head, 8, 8a, 8b... Side core, 9... Center core, 10, 10a,
10b, 11, 11a, 11b...gap, 1
2, 12a, 12b...Spacer, 12a'12
b'... Spacer remainder, 14a, 14b... Winding wire, 17... Thin film material, 18a 1 to 18a 4 , 18b 1 to
18b 3 ...slit.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] センターコアとサイドコアを一体に成形してダ
ブルギヤツプ構造とした消去ヘツドにおいて、前
記ギヤツプ部に挿入されて4ギヤツプを形成する
磁性体のスペーサーと、前記スペーサーには複数
のスリツトが設けられていることを特徴とする消
去ヘツド。
In an erasing head that has a double gap structure by integrally molding a center core and side cores, a magnetic spacer is inserted into the gap part to form four gaps, and the spacer is provided with a plurality of slits. Features an erasing head.
JP18696281U 1981-12-15 1981-12-15 erase head Granted JPS5890522U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18696281U JPS5890522U (en) 1981-12-15 1981-12-15 erase head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18696281U JPS5890522U (en) 1981-12-15 1981-12-15 erase head

Publications (2)

Publication Number Publication Date
JPS5890522U JPS5890522U (en) 1983-06-18
JPS6331207Y2 true JPS6331207Y2 (en) 1988-08-22

Family

ID=29989370

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18696281U Granted JPS5890522U (en) 1981-12-15 1981-12-15 erase head

Country Status (1)

Country Link
JP (1) JPS5890522U (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH042412Y2 (en) * 1985-08-26 1992-01-28

Also Published As

Publication number Publication date
JPS5890522U (en) 1983-06-18

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