JPS57164479A - Safety device of optical disk device - Google Patents

Safety device of optical disk device

Info

Publication number
JPS57164479A
JPS57164479A JP4958881A JP4958881A JPS57164479A JP S57164479 A JPS57164479 A JP S57164479A JP 4958881 A JP4958881 A JP 4958881A JP 4958881 A JP4958881 A JP 4958881A JP S57164479 A JPS57164479 A JP S57164479A
Authority
JP
Japan
Prior art keywords
rotation
disk
speed
cover
safety
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
JP4958881A
Other languages
Japanese (ja)
Inventor
Hideo Inuzuka
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP4958881A priority Critical patent/JPS57164479A/en
Publication of JPS57164479A publication Critical patent/JPS57164479A/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
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B19/10—Control of operating function, e.g. switching from recording to reproducing by sensing presence or absence of record in accessible stored position or on turntable

Landscapes

  • Rotational Drive Of Disk (AREA)

Abstract

PURPOSE:To secure safety during disk rotation by interlocking the opening and closure of a safety cover with the safety energizing of a safety energizing means when the rotation of an optical information disk is detected. CONSTITUTION:A thermistor unit 30 is fixed on a cover 12 and installed where wind generated by the rotation of a disk 1 is strong so that wind generated by the high-speed rotation of the disk is detected. Thus, the wind by the high-speed rotation of the optical information disk 11 is detected to detect the high-speed rotation of the disk 11 and cover locking mechanisms 31 and 32 are energized to perform locking during the high-speed rotation. Consequently, when the rotation of the disk 11 is speeded at a prescribed speed or above, the cover 12 is locked automatically and disabled to be opened. When the rotation speed of the disk decreases below the prescribed speed, the cover 12 is unlocked.
JP4958881A 1981-04-02 1981-04-02 Safety device of optical disk device Pending JPS57164479A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4958881A JPS57164479A (en) 1981-04-02 1981-04-02 Safety device of optical disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4958881A JPS57164479A (en) 1981-04-02 1981-04-02 Safety device of optical disk device

Publications (1)

Publication Number Publication Date
JPS57164479A true JPS57164479A (en) 1982-10-09

Family

ID=12835379

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4958881A Pending JPS57164479A (en) 1981-04-02 1981-04-02 Safety device of optical disk device

Country Status (1)

Country Link
JP (1) JPS57164479A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03116477A (en) * 1990-09-17 1991-05-17 Sony Corp Optical disk player
JPH0590648U (en) * 1991-02-12 1993-12-10 アイワ株式会社 Disk rotation control device
WO2000072320A1 (en) * 1999-05-25 2000-11-30 Fujitsu Limited Information storage device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03116477A (en) * 1990-09-17 1991-05-17 Sony Corp Optical disk player
JPH0590648U (en) * 1991-02-12 1993-12-10 アイワ株式会社 Disk rotation control device
WO2000072320A1 (en) * 1999-05-25 2000-11-30 Fujitsu Limited Information storage device

Similar Documents

Publication Publication Date Title
EP0342711A3 (en) Method of preventing undesired passage through revolving door system
JPS57164479A (en) Safety device of optical disk device
FR2353909A1 (en) Controlled access gate system - has turnstile pivoting about vertical axis in response to release signal
DE59407974D1 (en) Procedure for arming an intruder alarm system using a mortise lock with integrated block lock function
FR2545139B1 (en) SAFETY DEVICE WITH AUTOMATIC ACTION AGAINST FALSE OPERATIONS OF A LOCKING ROD EQUIPPED WITH A WINDOW FLAP OR THE LIKE
DE69107985T2 (en) Revolving door, especially for securing room access.
KR850002424A (en) Cable and Chain Stoppers
FR2454507A1 (en) SAFETY CABINET WITH SECONDARY CLOSURE DEVICE
JPS5360229A (en) Paper loading system
JPS54156339A (en) Manhole lid
JPS5385032A (en) Elevator system
FR2410799A1 (en) Domestic spin drier drum cover interlock - has vane operated by air vortex induced by drum rotation and engaging a pawl on cover to prevent opening
FR2603321B1 (en) DEVICE FOR LOCKING, IN THE OPEN POSITION, SHUTTERS AND SHUTTERS OPENING ON THE OUTSIDE
JPS5375651A (en) Door orening and closing system for elevator
SE8500447L (en) SEKERHETSLASTKROK
JPS6449073A (en) Image forming device
JPS54108798A (en) Double door locking device
JPS5653920A (en) Opening and shutting apparatus for vehicle door moving vertically
Campbell The formation and development of the security and intelligence branch of the Royal Canadian Mounted Police
JPS55113112A (en) Read error detection system of magnetic disk memory unit
FR2602538B1 (en) LOCK FOR DOORS OR WINDOWS, EQUIPPED WITH A BRAKING DEVICE PREVENTING THE INTEMPESTIVE ROTATION OF THE CANON MENTONNET
JPS52133646A (en) Emergency escape device for elevator
JPS5715260A (en) Disk deformation detection system
JPS54113363A (en) Entrance and exit administering gate
Warren What Is Ahead in Conveying Equipment