JPS6198212U

JPS6198212U -

Info

Publication number: JPS6198212U
Application number: JP18318584U
Authority: JP
Priority date: 1984-12-04
Filing date: 1984-12-04
Publication date: 1986-06-24

Description

[Brief explanation of the drawing]

第１図〜第２図は本考案の実施例を示し、第１
図ａは本考案に係るＶＴＲに用いられる磁気ヘツ
ドの一実施例を示す側面図、同図ｂは第１図ａに
示す磁気ヘツドの平面図、第２図は該磁気ヘツド
による出力波形を示す特性図、第３図〜第８図は
従来例を示し、第３図はＶＴＲのドラム付近のテ
ープ走行状態を示す概略平面図、第４図はその概
略側面図、第５図はそこに用いられる磁気ヘツド
の従来例を示す拡大平面図、第６図は該磁気ヘツ
ドと磁気テープとの接触状態を示す要部断面図、
第７図は回転ドラムの入口付近における上記磁気
ヘツドと磁気テープとの接触状態を示す要部断面
図、第８図は上記磁気ヘツドによる出力波形を示
す特性図である。１…磁気テープ、３…回転ドラム、４…固定ド
ラム、８…磁気ヘツドチツプ、９…ギヤツプ、１
０…磁気コア、１０ａ…磁気コアの磁気テープ走
行方向に沿う中心線、１０ｂ…中心線１０ａに直
交する方交の磁気コアの中心線、１０Ａ…中心線
１０ａをはさんで回転ドラム側に位置する磁気コ
アの磁気テープ摺接部分、１０Ｂ…中心線１０ａ
をはさんで固定ドラム側に位置する磁気コアの磁
気テープ摺接部分。 Figures 1 and 2 show embodiments of the present invention.
Figure a is a side view showing an embodiment of the magnetic head used in the VTR according to the present invention, Figure b is a plan view of the magnetic head shown in Figure 1a, and Figure 2 shows the output waveform of the magnetic head. Characteristic diagrams, Figures 3 to 8 show conventional examples, Figure 3 is a schematic plan view showing the tape running state near the drum of a VTR, Figure 4 is a schematic side view thereof, and Figure 5 is a conventional example. FIG. 6 is an enlarged plan view showing a conventional example of a magnetic head, and FIG.
FIG. 7 is a sectional view of a main part showing the state of contact between the magnetic head and the magnetic tape near the entrance of the rotating drum, and FIG. 8 is a characteristic diagram showing the output waveform of the magnetic head. 1... Magnetic tape, 3... Rotating drum, 4... Fixed drum, 8... Magnetic head chip, 9... Gap, 1
0... Magnetic core, 10a... Center line of the magnetic core along the magnetic tape running direction, 10b... Center line of the magnetic core orthogonal to the center line 10a, 10A... Located on the rotating drum side across the center line 10a. The magnetic tape sliding contact portion of the magnetic core, 10B...center line 10a
The magnetic tape sliding contact part of the magnetic core located on the fixed drum side.

Claims

[Scope of utility model registration request]

A rotatable rotating drum, a fixed drum arranged in parallel in the axial direction of the rotating drum, and a magnetic tape having a gap in the sliding contact surface between the rotating drum and the magnetic tape and provided at the edge of the rotating drum on the fixed drum side. In a magnetic recording/reproducing device equipped with a magnetic head, the area of the magnetic tape sliding contact area located on the rotating drum side is equal to the area of the magnetic tape sliding contact area located on the fixed drum side with respect to the center line of the magnetic head along the magnetic tape running direction. A magnetic recording/reproducing device characterized by being set larger than the area of the part.