JPS5737207A - Detecting mechanism for projection part on recording medium - Google Patents

Detecting mechanism for projection part on recording medium

Info

Publication number
JPS5737207A
JPS5737207A JP11304680A JP11304680A JPS5737207A JP S5737207 A JPS5737207 A JP S5737207A JP 11304680 A JP11304680 A JP 11304680A JP 11304680 A JP11304680 A JP 11304680A JP S5737207 A JPS5737207 A JP S5737207A
Authority
JP
Japan
Prior art keywords
head
floating
ultrasonic sensor
recording medium
elastic member
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
JP11304680A
Other languages
Japanese (ja)
Inventor
Toshiro Kita
Kenji Kogure
Yasunaga Mitsuya
Takuji Nakanishi
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP11304680A priority Critical patent/JPS5737207A/en
Publication of JPS5737207A publication Critical patent/JPS5737207A/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
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • 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
    • G11B5/58—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 provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion

Landscapes

  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
  • Manufacturing Of Magnetic Record Carriers (AREA)

Abstract

PURPOSE:To detect a projecton part on a recording medium without spoiling a floating property of a head and at a high precision, by a method wherein a large- sized ultrasonic sensor is mounted at a waveguide plate which is constituted in the manner such that a part of an elastic member for holding a floating head which does not exercise an influence on floating of a head, is extended. CONSTITUTION:A large-sized ultrasonic sensor 10 is mounted on a waveguide plate 9 which is formed by extending a part 6, being a part of an elastic member 2 and fixed to a spacer 5, which does not exercise an influence on a floating head 1. Ultrasonic wave, produced resulting from contacting of a projection part 11 with the floating head 1, reaches the ultrasonic sensor 10 through the elastic member 2 and the waveguide plate 9 which are monolithically united together, and thereby damping decreases. Thus, the projection part, coupled with the use of the large- sized ultrasonic sensor 10, can perform a high-precose detection. If the wavegide plate 9 is long to some extent, the projection 11, existing at an inner circumferece side of a recording medium 7, can also be detected.
JP11304680A 1980-08-19 1980-08-19 Detecting mechanism for projection part on recording medium Pending JPS5737207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11304680A JPS5737207A (en) 1980-08-19 1980-08-19 Detecting mechanism for projection part on recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11304680A JPS5737207A (en) 1980-08-19 1980-08-19 Detecting mechanism for projection part on recording medium

Publications (1)

Publication Number Publication Date
JPS5737207A true JPS5737207A (en) 1982-03-01

Family

ID=14602111

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11304680A Pending JPS5737207A (en) 1980-08-19 1980-08-19 Detecting mechanism for projection part on recording medium

Country Status (1)

Country Link
JP (1) JPS5737207A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146142A (en) * 1983-02-10 1984-08-21 Matsushita Electric Ind Co Ltd Planar picture image display device
JPS61124042A (en) * 1984-11-19 1986-06-11 Matsushita Electric Ind Co Ltd Picture display apparatus
JPS6210849A (en) * 1985-07-08 1987-01-19 Ise Electronics Corp Display tube for light source
JPS62134555A (en) * 1985-12-06 1987-06-17 Fujitsu Ltd Method for testing magnetic recording medium

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55108931A (en) * 1979-02-13 1980-08-21 Fujitsu Ltd Inspection method of magnetic disc surface

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55108931A (en) * 1979-02-13 1980-08-21 Fujitsu Ltd Inspection method of magnetic disc surface

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146142A (en) * 1983-02-10 1984-08-21 Matsushita Electric Ind Co Ltd Planar picture image display device
JPS61124042A (en) * 1984-11-19 1986-06-11 Matsushita Electric Ind Co Ltd Picture display apparatus
JPS6210849A (en) * 1985-07-08 1987-01-19 Ise Electronics Corp Display tube for light source
JPS62134555A (en) * 1985-12-06 1987-06-17 Fujitsu Ltd Method for testing magnetic recording medium

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