JPS5760524A - Magnetic head with low sliding noise - Google Patents

Magnetic head with low sliding noise

Info

Publication number
JPS5760524A
JPS5760524A JP13443780A JP13443780A JPS5760524A JP S5760524 A JPS5760524 A JP S5760524A JP 13443780 A JP13443780 A JP 13443780A JP 13443780 A JP13443780 A JP 13443780A JP S5760524 A JPS5760524 A JP S5760524A
Authority
JP
Japan
Prior art keywords
core
sound wave
magnetic head
absorbing body
wave absorbing
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.)
Pending
Application number
JP13443780A
Other languages
Japanese (ja)
Inventor
Hideo Fujiwara
Takeshi Kimura
Nobuo Kobayashi
Yoshihiro Shiroishi
Sanehiro Kudo
Teizou Tamura
Kageyoshi Katakura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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 by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP13443780A priority Critical patent/JPS5760524A/en
Publication of JPS5760524A publication Critical patent/JPS5760524A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/133—Structure or manufacture of heads, e.g. inductive with cores composed of particles, e.g. with dust cores, with ferrite cores with cores composed of isolated magnetic particles
    • G11B5/1335—Assembling or shaping of elements

Abstract

PURPOSE:To reduce sliding noise remarkably, by acoustically coupling a sound wave absorbing body having acoustic impedance in matching with a magnetic head core, to said core. CONSTITUTION:For example, core hemispheres 2, 2' made of single crystal of Mn- Zn ferrite are glass-bonded via an operation gap 3, a glass 4 is incorporated near the gap 3 to protect the gap 3 and to form a magnetic head core 1. A coil 11 is wound in a winding hole 5 of the core 1. >=60% Powder such as W powder having several- several tens mu of particle diameter is mixed in a thermosetting resin such as an epoxy resin, and a sound wave absorbing body 12 in which the acoustic impedance is >= about 1X10<7>kg/cm<2>.s to longitudinal waves in MHz band is attached so that the head core 1 can be covered in about 1mm. thickness, is bonded to a brass- made head base 9. The said sound wave absorbing body is inserted and bonded to the winding hole 5 of the core 1. Thus, the magnetic head remarkably lowering sliding noise can be achieved by using the >=10dB/cm sound wave absorbing body in sound wave attenuation rate to MHz band longitudinal waves.
JP13443780A 1980-09-29 1980-09-29 Magnetic head with low sliding noise Pending JPS5760524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13443780A JPS5760524A (en) 1980-09-29 1980-09-29 Magnetic head with low sliding noise

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13443780A JPS5760524A (en) 1980-09-29 1980-09-29 Magnetic head with low sliding noise

Publications (1)

Publication Number Publication Date
JPS5760524A true JPS5760524A (en) 1982-04-12

Family

ID=15128337

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13443780A Pending JPS5760524A (en) 1980-09-29 1980-09-29 Magnetic head with low sliding noise

Country Status (1)

Country Link
JP (1) JPS5760524A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795852A2 (en) * 1996-03-14 1997-09-17 Sony Corporation Magnetic head

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795852A2 (en) * 1996-03-14 1997-09-17 Sony Corporation Magnetic head
EP0795852A3 (en) * 1996-03-14 1999-04-07 Sony Corporation Magnetic head

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