JPS5852629U

JPS5852629U - Shield case for magnetic head

Info

Publication number: JPS5852629U
Application number: JP14724981U
Authority: JP
Inventors: 丹治　和夫
Original assignee: 株式会社日立製作所
Priority date: 1981-10-05
Filing date: 1981-10-05
Publication date: 1983-04-09

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、従来のヘッドキャップの概略斜視図、第２図
は、本考案の一実施によるシールドケースの概略斜視図
、第３図は、垂れ下り部長さの変化に対するＳ／Ｎ比の
変化を示す特性図、第４図は、バックシールド長さの変
化に対するＳ／Ｎ比の変化を示す特性図、第５図は、右
シールド長さの変化に対するＳ／Ｎ比の変化を示す特性
図、第６図は、左シールド長さの変化に対するＳ／Ｎ比
の変化を示ヂ特性図である。ａ・・・庇部、ａ′・・・垂れ下り部、ｂ・・・バック
シールド、Ｃ・・・右シールド、ｄ・・・左シールド。Fig. 1 is a schematic perspective view of a conventional head cap, Fig. 2 is a schematic perspective view of a shield case according to one implementation of the present invention, and Fig. 3 is a change in S/N ratio with respect to a change in the length of the hanging portion. FIG. 4 is a characteristic diagram showing changes in the S/N ratio with respect to changes in the back shield length. FIG. 5 is a characteristic diagram showing changes in the S/N ratio with respect to changes in the right shield length. , FIG. 6 is a characteristic diagram showing the change in the S/N ratio with respect to the change in the left shield length. a... Eave part, a'... Hanging part, b... Back shield, C... Right shield, d... Left shield.

Claims

[Scope of utility model registration request]

In a shield case that shields a composite head that combines a VTR audio head, control head, and audio erasing head, 5 mm from the top of the head, excluding the tape sliding surface side and the lower head mounting part.
It is characterized by having an eave shape that surrounds the periphery of the head over the above length, and protrudes toward the tape sliding surface side near the top of the audio/control head, with the tip hanging down in an abbreviated shape. A shield case for magnetic heads.