JPH0212712U

JPH0212712U -

Info

Publication number: JPH0212712U
Application number: JP8976188U
Authority: JP
Priority date: 1988-07-05
Filing date: 1988-07-05
Publication date: 1990-01-26

Description

[Brief explanation of drawings]

第１図ないし第３図は請求項第１項に係る考案
の一実施例を示すものであつて、第１図は回転ド
ラムに対する各磁気ヘツドの基本的な配設状態を
示む説明図、第２図は回転ドラムに対する各磁気
ヘツドの具体的な配設状態を示す説明図、第３図
は長時間記録モードにより磁気テープ上に記録さ
れたトラツクパターンを示す説明図、第４図は請
求項第２項に係る考案の一実施例を示すものであ
つて、回転ドラムに対する各磁気ヘツドの具体的
な配設状態を示す説明図、第５図ないし第７図は
従来例を示すものであつて、第５図は回転ドラム
に対する各磁気ヘツドの配設状態を示す説明図、
第６図は標準記録モードにより磁気テープ上に記
録されたトラツクパターンを示す説明図、第７図
は長時間記録モードにより磁気テープ上に記録さ
れたトラツクパターンを示す説明図である。１１は回転ドラム、１２は磁気テープ、Ａ_１，
Ａ_２，Ｂ_１，Ｂ_２は磁気ヘツドである。 1 to 3 show an embodiment of the invention according to claim 1, and FIG. 1 is an explanatory diagram showing the basic arrangement of each magnetic head with respect to the rotating drum; Fig. 2 is an explanatory diagram showing the specific arrangement of each magnetic head with respect to the rotating drum, Fig. 3 is an explanatory diagram showing the track pattern recorded on the magnetic tape in the long-time recording mode, and Fig. 4 is an explanatory diagram showing the track pattern recorded on the magnetic tape in the long-time recording mode. This is an explanatory diagram showing an embodiment of the invention related to item 2, and shows the specific arrangement of each magnetic head with respect to the rotating drum, and FIGS. 5 to 7 show conventional examples. FIG. 5 is an explanatory diagram showing the arrangement of each magnetic head with respect to the rotating drum;
FIG. 6 is an explanatory diagram showing a track pattern recorded on the magnetic tape in the standard recording mode, and FIG. 7 is an explanatory diagram showing a track pattern recorded on the magnetic tape in the long-time recording mode. 11 is a rotating drum, 12 is a magnetic tape, A ₁ ,
A ₂ , B ₁ and B ₂ are magnetic heads.

Claims

[Claims for Utility Model Registration] 1. Along the outer periphery of the rotating drum, _A1 and _A2 heads having azimuth angles in the same direction, either positive or negative, and azimuth angles in the opposite direction from these _A1 and _A2 heads. Four magnetic heads are provided, with _B1 and _B2 heads having a magnetic field, and the _A1 and _B1 heads described above are arranged at an angle of 180°, while the _B2 head and the _A1 head are arranged at an angle of 180°. Close to A
It is placed on the rotation direction side of the _first head, A _{and the second} head is B.
In a double azimuth 4-head device that is placed close to _the _B1 head in the rotational direction, the _A2 head and _B2 head described above are defined by the distance between the _A1 head and the _B2 head, and the distance between the B2 head and the B1 head. The distances between the _1st head and the _2nd head are different, and the _2nd head is 180 degrees away from the _2nd head _. It is characterized by being arranged at a position shifted by an amount corresponding to ΔαH in the direction of rotation of the head, where 1H is one horizontal period and the H shift between adjacent tracks during recording in long-time recording mode is ΔαH. Double azimuth 4 head device. 2 Along the outer circumference of the rotating drum, A1 _and _A2 heads having azimuth angles in the same direction, either positive or negative, and _B1 and _B2 heads having azimuth angles in the opposite direction to these _A1 and _A2 heads. The _A1 head and the _B1 head are arranged at an angle of 180 degrees, while the _B2 head is adjacent to the _A1 head.
It is placed on the rotation direction side of the _first head, A _{and the second} head is B.
In a double azimuth 4-head device that is placed close to _the _B1 head in the rotational direction, the _A2 head and _B2 head described above are defined by the distance between the _A1 head and the _B2 head, and the distance between the B2 head and the B1 head. The distances between the _1st head and the _A2 head are different, and the _B2 head is separated from the A1 head by ₂ times, with 1H being one horizontal period.
A double azimuth four-head device characterized in that the _A2 head is arranged at a distance corresponding to 1H from the _B1 head.