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    • 8. 发明专利
    • OPTICAL SCANNING DEVICE
    • JPH03263025A
    • 1991-11-22
    • JP6334390
    • 1990-03-14
    • COPAL CO LTD
    • KONO TAKANORIOKAJIMA KOICHI
    • G03B27/32
    • PURPOSE:To obtain a vivid image with a simple structure by providing a shutter member which is attached to an optical member so that the aperture part is opened at the time of going of the optical member and is closed at the time of returning. CONSTITUTION:An original picture means 1, a photosensitive member 2, an optical member 3 having the aperture part through which the light from the means 1 is transmitted to the photosensitive member 2, and a shutter member 10 are provided, and this shutter member is attached to the optical member 3 so that the aperture part is opened at the time of going of the optical member and is closed at the time of returning. The optical member 3 is moved back and forth to scan the original picture means 1, and the image of the means 1 is exposed to the photosensitive member 2, and exposure is performed only at the time of going of the optical member 3 because the aperture part of the optical member 3 is opened only at the time of going. Consequently, not only the aperture part is opened and closed in accordance with running of the optical member but also a driving means to open and close the aperture part is unnecessary. Thus, a vivid image is obtained with the simple structure.
    • 9. 发明专利
    • PAD REJECTING DEVICE IN MAGNETIC DISK DRIVE
    • JPH01258261A
    • 1989-10-16
    • JP8407988
    • 1988-04-07
    • COPAL CO LTD
    • OKAJIMA KOICHINAKAMORI MASAOOZEKI YOSHIYUKI
    • G11B17/34
    • PURPOSE:To prevent damage in a housing by fitting the cam follower of a pad rejecting lever to plural recessed parts, which are formed in the outer periphery of a cam to be fixed to a screw shaft, and separating a pad from a magnetic disk. CONSTITUTION:When the driving of a magnetic disk drive is stopped while a magnetic disk 2 is received in a housing 3, when a pad rejecting button is depressed, a pulse motor 15 is driven by a prescribed pulse number and a recessed part 31 formed in the outer periphery of a peripheral surface cam 28 to be co-axial with a screw shaft 11 is faced to a cam follower 27 of a pad rejecting lever 25. Then, the peripheral surface cam 28 is stopped and the cam follower 27 of the pad rejecting lever 25 is fit to the recessed part 31 of the peripheral surface cam 28. After that, an engaging part 26 of the pad rejecting lever 25 keeps a condition such as pressing up a pressing board 22 against respective springs 21. In such a condition, a pad 7 is separated from the magnetic disk 2 and a magnetic head 5 is also separated from the magnetic disk 2. Then, even when the magnetic disk 2 is left in the housing 3 for a long period, the damage is not given to the magnetic disk 2.
    • 10. 发明专利
    • POSITION TRANSDUCER
    • JPS62230397A
    • 1987-10-09
    • JP6829786
    • 1986-03-28
    • COPAL CO LTD
    • OZEKI YOSHIYUKIOKAJIMA KOICHI
    • G01B7/00H02P8/00H02P8/38
    • PURPOSE:To detect a position with extremely high reliability by detecting back electromotive force and detecting an access to a predetermined position. CONSTITUTION:A control section 1 controls a stepping motor 4 through a drive circuit 2 and a phase excitation control circuit 3. A back electromotive force detection circuit 5 detects back electromotive force generated when 1 driven body transferred by the revolution of the stepping moter 4 driven by a drive means is brought into contact with a stopper and the stepping motor is rotated reversely at a stable position determined by the subsequent exciting phase of the stepping motor, thus detecting an access to a prescribed position. Accordingly, a position sensor, which need not use a photosensor and a microswitch for detecting the prescribed position, in which un neccssary signal conductors need not be drawn around and which has simple constitution and extremely high reliability, is acquired.