JPS632983Y2 - - Google Patents

Description

【考案の詳細な説明】 周知のように磁気ヘツドでは外部磁界によるノ
イズを防止するため、コアを保護ケースで囲んで
いる。そして又磁気ヘツドの大きさは保護ケース
できまり、しばしば顧客の要求で決められるが例
えば磁気ヘツドのチヤンネル数を増やしたい場合
必然的にコアブロツクの個数が増え保護ケース内
のコアブロツクの設置スペースが狭くなる不都合
は避け難い。[Detailed Description of the Invention] As is well known, in a magnetic head, the core is surrounded by a protective case to prevent noise caused by external magnetic fields. Furthermore, the size of the magnetic head is determined by the protective case, and is often determined by customer requirements, but for example, if you want to increase the number of channels of the magnetic head, the number of core blocks will inevitably increase, and the space for installing the core blocks in the protective case will become narrower. Inconveniences are hard to avoid.

たとえば、４トラツク４チヤンネルタイプの磁
気ヘツドでは第１図に示すようなコアを２つ突き
合わせて１つのコアブロツク（磁気回路）を形成
し、このコアブロツクの４個が１つの保護ケース
内におさめられるが、この場合コアに捲かれた巻
線厚みt′の方がコア厚ｔよりも大きくなつてしま
い、従つて保護ケースを不当に大きくしなければ
ならない。 For example, in a 4-track, 4-channel type magnetic head, two cores as shown in Figure 1 are butted together to form one core block (magnetic circuit), and four of these core blocks are housed in one protective case. In this case, the thickness t' of the winding wound around the core is greater than the core thickness t, and therefore the protective case must be made unduly large.

このようなことから、従来までは例えば実公昭
52−17293号のように、相互に積層される各コア
に、該コアの積重ね方向と直角な平面をなす並列
部を設け、この並列部を積重ね方向と直角に並べ
ることによつて、この部分にコイルを巻いたと
き、コイルがコアの合計厚さの範囲に収まるよう
に狭巾にしたものが知られているが、しかし、こ
のものは各コアの並列部を上記のように積重ね方
向と直角に並べるため、各コアの並列部を左右コ
ア同志の突き合せ構造上、どうしても細巾に形成
する必要があり、従つて並列部の並び組立状態の
綜合断面積は、大旨コア１枚の断面積程度と極め
て小さくなり、つまり磁気抵抗が高くなると云う
問題がある。 For this reason, until now, for example,
As in No. 52-17293, each core that is stacked on each other is provided with a parallel part that forms a plane perpendicular to the stacking direction of the cores, and by arranging the parallel parts perpendicular to the stacking direction, this part It is known that when a coil is wound on a coil, the width is narrowed so that the coil falls within the range of the total thickness of the cores, but in this case, the parallel parts of each core are In order to arrange the cores at right angles, it is necessary to make the parallel parts of each core narrow due to the structure in which the left and right cores butt each other. There is a problem that the cross-sectional area becomes extremely small, that is, the magnetic resistance becomes high.

加えて、上記並列部を細巾に形成することはコ
アの加工上、極めて煩雑であると言わねばならな
い。 In addition, it must be said that forming the parallel portions to have a narrow width is extremely complicated in processing the core.

そこでこの考案は、コアの合計厚みの範囲内に
コイルを捲挿させることには相違ないが、そのた
めの構成としてコア部分の断面積をできるだけ減
少させないように、つまり磁気抵抗を低くし且つ
加工性をよくするように工夫したものである。 Therefore, this idea is to wind the coil within the range of the total thickness of the core, but the structure for this purpose is to prevent the cross-sectional area of the core from decreasing as much as possible, that is, to lower the magnetic resistance and improve workability. It has been devised to improve the

以下図面について実施例の詳細を述べる。 The details of the embodiment will be described below with reference to the drawings.

第２図、第３図において、ダミーコア１を挾ん
でその両面に磁気回路形成用コア２，３を重合す
る形式の磁気ヘツド用コアブロツクにおいて、上
記ダミーコア１は、磁気回路形成用コア２，３と
同一磁性材によつて、磁気回路形成用コア２，３
の前部のみに介在するように短小に且つその側面
形状を磁気回路形成用コア２，３との重合部と同
一形状に形成し、この短小により自ずと磁気回路
形成用コア２，３の後部に生じた上記ダミーコア
１の肉厚による対向間隙を該磁気回路形成用コア
の内向きの屈折によつて重合閉塞し、この閉塞に
よつて自ずと肉薄化した磁気回路形成用コア部分
（巻線部）に巻線４を施したものである。 In FIGS. 2 and 3, in a core block for a magnetic head in which a dummy core 1 is sandwiched and magnetic circuit forming cores 2 and 3 are superposed on both sides of the dummy core 1, the dummy core 1 and the magnetic circuit forming cores 2 and 3 are overlapped. Cores 2 and 3 for forming magnetic circuits are made of the same magnetic material.
It is short and small so that it is present only in the front part, and its side surface shape is the same as the overlapping part with the magnetic circuit forming cores 2 and 3. Due to this short and small size, it naturally lies in the rear part of the magnetic circuit forming cores 2 and 3. The resulting opposing gap due to the thickness of the dummy core 1 is polymerized and closed by inward refraction of the magnetic circuit forming core, and the magnetic circuit forming core portion (winding portion) naturally becomes thinner due to this closing. A winding 4 is applied to the wire.

尚、上記ダミーコア１がコア２，３間に挾合さ
れることは、ダミーコアの漏洩磁束を少くするた
めなることは勿論である。 It goes without saying that the reason why the dummy core 1 is inserted between the cores 2 and 3 is to reduce the leakage magnetic flux of the dummy core.

上述のように本考案によれば、磁気回路形成用
コアと同一磁性材よりなるダミーコアを磁気回路
形成用コアより短く形成して、これを上記磁気回
路形成用コアの前部のみにその重合部の側面形状
を上記磁気回路形成用コアと同一形状として、図
のように介在させたので、磁気回路形成用コアの
後部には上記ダミーコアの肉厚による間隙が自ず
と生じ、この間隙を利用して磁気回路形成用コア
を内向きに対称的に重合させ、もつて肉薄化され
た巻線部を構成するので、この巻線部はコア自身
の本来の巾そのものであり、換言すれば先に述べ
た従来品のように巻線部を細巾に形成する必要は
全くなくなり、上記磁気回路形成用コアをその厚
さ方向に対称的に内向きに屈折させて単に曲げ加
工すればよいので、加工が簡単になると同時に上
記従来品に比して磁気回路形成用コアの断面積を
大きくとることができるので結局それだけ磁気抵
抗を小さくすることができ、さらに磁気回路形成
用コアをその厚さ方向に対称的に内向きに屈折さ
せてるようにしたので巻線部を上記磁気回路形成
用コアの中心部に収納することができ、且つ上記
ダミーコアの形状を磁気回路形成用コアの重合部
の形状と同一形状にしたので、上記ダミーコアと
磁気回路形成用コアとの積層作業が行い易いとい
つた効果を奏する。 As described above, according to the present invention, a dummy core made of the same magnetic material as the magnetic circuit forming core is formed shorter than the magnetic circuit forming core, and the overlapping portion is formed only in the front part of the magnetic circuit forming core. Since the side shape of the dummy core is the same as that of the magnetic circuit forming core and is interposed as shown in the figure, a gap is naturally created at the rear of the magnetic circuit forming core due to the thickness of the dummy core, and this gap can be used to Since the magnetic circuit forming core is symmetrically polymerized inward to form a thinned winding section, this winding section has the original width of the core itself; in other words, it has the same width as described above. There is no need to form the winding part narrowly as in conventional products, and the magnetic circuit forming core can be bent inward symmetrically in the thickness direction and simply bent. At the same time, the cross-sectional area of the core for forming a magnetic circuit can be made larger than that of the conventional product, so the magnetic resistance can be reduced accordingly. Since the dummy core is bent symmetrically inward, the winding part can be housed in the center of the magnetic circuit forming core, and the shape of the dummy core is similar to the shape of the overlapping part of the magnetic circuit forming core. Since they have the same shape, the dummy core and the magnetic circuit forming core can be laminated easily.

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

第１図は従来例の説明図、第２図は本考案によ
る斜面図、第３図は同上側面図である。 １……ダミーコア、２，３……磁気回路形成用
コア、４……コイル。 FIG. 1 is an explanatory diagram of a conventional example, FIG. 2 is a perspective view of the present invention, and FIG. 3 is a side view of the same. 1... Dummy core, 2, 3... Core for magnetic circuit formation, 4... Coil.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 磁気回路形成用コアと、該磁気回路形成用コア
と同一磁性材よりなりその側面形状を上記磁気回
路形成用コアとの重合部と同一形状にしたダミー
コアとを有し、上記ダミーコアを挟んでその両面
に対称的に上記磁気回路形成用コアを重合する形
式の磁気ヘツド用コアーブロツクであつて、上記
ダミーコアは上記磁気回路形成用コアの前部のみ
に介在する短小に形成し、この短小によつて自ず
と上記磁気回路形成用コアの後部に生ずる上記ダ
ミーコアの肉厚による対向間隙を上記磁気回路形
成用コアの内向きの対称的な屈折によつて重合閉
塞し、この閉塞によつて自ずと肉薄化された上記
磁気回路形成用コアの後部部分を巻線部となした
ことを特徴として成る磁気ヘツド用コアーブロツ
ク。 It has a core for forming a magnetic circuit, and a dummy core made of the same magnetic material as the core for forming a magnetic circuit and having a side surface having the same shape as the overlapping part with the core for forming a magnetic circuit, with the dummy core sandwiched therebetween. A core block for a magnetic head in which the magnetic circuit forming cores are superimposed symmetrically on both sides, and the dummy core is formed into a short and small shape interposed only in the front part of the magnetic circuit forming core, and the short and small size The opposing gap that naturally occurs at the rear of the magnetic circuit forming core due to the wall thickness of the dummy core is polymerized and closed by the inward symmetrical bending of the magnetic circuit forming core, and the thickness is naturally reduced by this closing. A core block for a magnetic head, characterized in that the rear portion of the magnetic circuit forming core is a winding portion.