JPS5534355A - Rotating magnetic head device - Google Patents

Rotating magnetic head device

Info

Publication number
JPS5534355A
JPS5534355A JP10701278A JP10701278A JPS5534355A JP S5534355 A JPS5534355 A JP S5534355A JP 10701278 A JP10701278 A JP 10701278A JP 10701278 A JP10701278 A JP 10701278A JP S5534355 A JPS5534355 A JP S5534355A
Authority
JP
Japan
Prior art keywords
rotor
rotating
detected
magnetic head
magnetic
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
JP10701278A
Other languages
Japanese (ja)
Inventor
Shigeki Morinaga
Seiji Yamashita
Kunio Miyashita
Tadashi Takahashi
Takeo Maeda
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 JP10701278A priority Critical patent/JPS5534355A/en
Publication of JPS5534355A publication Critical patent/JPS5534355A/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
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
    • G11B5/53—Disposition or mounting of heads on rotating support

Abstract

PURPOSE:To shorten the length of the axis of the rotating magnetic head and make VTR compact by providing the rotating number detecting means and the position detecting means of the non-commutator motor around the rotor of the non-commutator motor in the fixed drum. CONSTITUTION:On the lower surface of the yoke 17 in the fixed drum 5, print circuit board 38 is mounted at portion except the fixed member 19. On this printed circuit board 38, magnetic sensitive elements 39 are disposed around the rotor 20 at 60 spacings, the leakage magnetic flux of the rotor 20 is detected and the position of the rotor 20 is detected. On the board 38, iron core of shape 41 is mounted. The iron core 41, the circumference wall of the rotor cover 22 and the teeth shape protrusion 43 constitute the magnetic circuit of magnetic flux of the permanent magnet. Accordingly, when the teeth shaped protrusion 43 together with thr rotor 20, the magnetic flux changes periodically. This is detected by the detecting coil 42 to obtain the number of the rotation of the rotating drum. According to the such construction, the axis length of the rotating magnetic head can be shortened and VTR be made compact.
JP10701278A 1978-09-02 1978-09-02 Rotating magnetic head device Pending JPS5534355A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10701278A JPS5534355A (en) 1978-09-02 1978-09-02 Rotating magnetic head device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10701278A JPS5534355A (en) 1978-09-02 1978-09-02 Rotating magnetic head device

Publications (1)

Publication Number Publication Date
JPS5534355A true JPS5534355A (en) 1980-03-10

Family

ID=14448254

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10701278A Pending JPS5534355A (en) 1978-09-02 1978-09-02 Rotating magnetic head device

Country Status (1)

Country Link
JP (1) JPS5534355A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284418A (en) * 1985-10-09 1987-04-17 Hitachi Ltd Rotating head device
US4891726A (en) * 1986-12-30 1990-01-02 Sony Corporation Rotary magnetic head and guide drum assembly with reduce mounting height

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284418A (en) * 1985-10-09 1987-04-17 Hitachi Ltd Rotating head device
US4891726A (en) * 1986-12-30 1990-01-02 Sony Corporation Rotary magnetic head and guide drum assembly with reduce mounting height

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