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公开(公告)号：DE2916334A1
公开(公告)日：1979-10-31
申请号：DE2916334
申请日：1979-04-23
Applicant: CANON KK
Inventor： TSUNEKAWA TOKUICHI , DATE NOBUAKI , AIZAWA HIROSHI , HOSOE KAZUYA , URUSHIBARA KAZUNORI
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公开(公告)号：DE2757777A1
公开(公告)日：1978-06-29
申请号：DE2757777
申请日：1977-12-23
Applicant: CANON KK
Inventor： KOZUKI SUSUMU , UCHIDOI MASANORI , DATE NOBUAKI , SHIMIZU MASAMI , AIZAWA HIROSHI , TAKISHIMA YOSHIYUKI
Abstract: A motor drive unit adapted for use with a camera having a motorized shutter speed adjusting device. When a continuous series of frame exposures are to be made at a predetermined frame frequency, the set value of shutter time in the camera is made to be compared with the longest possible shutter time dependent upon that frame frequency by a comparator provided in the motor drive unit. When the actual shutter time value exceeds the longest possible one, the motorized shutter speed adjusting device is actuated, causing the shutter time value to change itself to the longest possible value.
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公开(公告)号：DE2703391A1
公开(公告)日：1977-08-04
申请号：DE2703391
申请日：1977-01-27
Applicant: CANON KK
Inventor： DATE NOBUAKI
Abstract: A device for releasing a film wind-up mechanism used for winding up film by driving a sprocket which is interlocked with a film wind-up means. The device is provided with a means for releasing the sprocket and the film wind-up mechanism from their states of being interlocked with each other when a preset number of film frames have been wound up.
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公开(公告)号：DE2637404A1
公开(公告)日：1977-02-24
申请号：DE2637404
申请日：1976-08-19
Applicant: CANON KK
Inventor： TAGUCHI TATSUYA , DATE NOBUAKI
Abstract: In a reflex camera a mirror support is composed of a base with flexible members and arms carried by the base. Each arm has one end bendable to position the mirror on the base, while the other end forms a stop to restrict movement of the mirror. The arms also have axle bearing support for positioning the base relative to the light path and the reflective plane of the mirror. The flexible members of the base are adhesively coated for holding the mirror in position relative to the light path.
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公开(公告)号：JPH11352437A
公开(公告)日：1999-12-24
申请号：JP17670998
申请日：1998-06-09
Applicant: CANON KK
Inventor： DATE NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To prevent noises due to air sound when a rotary polyhedral mirror is rotated at a high speed by providing the inside wall of a cover for covering the circumference of this rotary polyhedral mirror with a plurality of annular peak-shaped projections. SOLUTION: The annular peak-shaped projections 3 which are sound absorption means having a special sound absorption effect are disposed on the inside wall of the cover 3. The peak-shaped projections 13 are formed in a plurality to an annular shape in the circumferential direction of the inside wall of the cylindrical portion 3a of the cover 3. The cross-sectional shape of the respective peak-shaped projections 13 is a peak shape and sound waves repetitively come into collision against the slopes thereof, by which the energy of the sound is successively annihilated on the principle similar to that of pyramidal projects disposed on the inside wall of a so-called acoustic chamber. As a result, the sound absorption effect of the cover 3 is increased and the noises due to the air sound when the rotary polyhedral mirror 1 is rotated at a high speed are lowered. Then, even if the number of revolutions of the rotary polyhedral mirror 1 exceeds 30,000 rpm, there is the sound absorption effect by the inside wall of the cover 3 provided with the peak-shaped projections 13 and, therefore, the scanning optical device of the silent running sound may be obtd.
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Patent Agency Ranking
公开(公告)号：JPH11249060A
公开(公告)日：1999-09-17
申请号：JP6613598
申请日：1998-03-02
Applicant: CANON KK
Inventor： DATE NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To correct the change of optical performance due to deformation of a polygon mirror caused by a centrifugal force during its rotation irrelevantly to the shape of the polygon mirror and its fixing method. SOLUTION: This electrophotographic device performs laser writing by forming a latent image on the surface of a photosensitive drum 9 by deflecting laser light through the rotation of the polygon mirror 3. A return mirror 6 which can deform is provided between the polygon mirror 3 and photosensitive drum 9 and optical characteristic variation due to the deformation of a polygon mirror surface caused by the centrifugal force during the rotation of the polygon mirror 3 and reverse optical characteristic variation due to the deformation of the return mirror 6 correct each other.
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公开(公告)号：JPH06187644A
公开(公告)日：1994-07-08
申请号：JP35469892
申请日：1992-12-17
Applicant: CANON KK
Inventor： DATE NOBUAKI
Abstract: PURPOSE:To correct an actuator without causing an arc motion of the actuator by driving the base end part of an actuator-holding composite parallel plate spring in the direction orthgonal to the tracking direction of the actuator in response to the motion of the actuator set in its tracking direction. CONSTITUTION:When a current is supplied to a tracking coil 4, a composite parallel plate spring 2 is bent by an actuator with the current of the coil 4 as well as the magnetic flux of a magnetic circuit consisting of an inner yoke 8, a magnet 9 and an outer yoke 1. Thus, the seeking direction of the spring 2 moves forward or backward. Under such conditions, the actuator 1 tries to have an arc motion in the direction tangential to a rail 17 by the flection of the spring 2. Thus, the irradiating distribution to a sensor 6 with laser varies owing to the inclination of the actuator 1. Therefore, a difference of output is caused between two areas. Basing on this difference signal, a drive means is controlled and a current is supplied to a correction coil 12 for actuation of a carriage 11. Therefore, the spring 2 whose base is connected to the carriage 11 can correct the inclination of the actuator not allowing to take arc locus, to make the actuator 1 move straight.
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公开(公告)号：JPH06119641A
公开(公告)日：1994-04-28
申请号：JP28713792
申请日：1992-10-02
Applicant: CANON KK
Inventor： DATE NOBUAKI
Abstract: PURPOSE:To prevent the up and clown movement of a mirror through the focusing of an objective lens, to increase the twist rigidity of a composite parallel leaf spring and to minimize the light axis tilt of the mirror. CONSTITUTION:An actuator 5 with an objective lens 6 moving in a tracking direction to an optical information recording medium is held on the composite parallel leaf spring 9; and focusing, tracking and access operation are performed for the optical information recording medium by the control of the movement of the above actuator 5. In this objective lens driving device, the mirror by which a laser beam is directed to the objective lens 6 is provided in a carriage through an optical system, and the carriage is structured to be held or guided independently of the actuator 5.
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公开(公告)号：JPH05342684A
公开(公告)日：1993-12-24
申请号：JP17152792
申请日：1992-06-08
Applicant: CANON KK
Inventor： DATE NOBUAKI , FUJINO MASAHISA
IPC: G11B11/10 , G11B11/105 , G11B19/02 , G11B21/12
Abstract: PURPOSE:To prevent the damage of a magnetic head or a magneto-optical recording medium by detecting frictional resistance between the loaded magnetic head and the magneto-optical recording medium and retracting the magnetic head to an unloading position based on the detected signal. CONSTITUTION:The magneto-optical disk device is constituted so that a retracting means 11 for retracting the magnetic head 7 from the magneto-optical recording medium 1 to the unloading position is driven, when the frictional resistance between the magneto-optical recording medium 1 and the magnetic head 7 at the loading position of the magnetic head 7 exceeds a prescribed value.
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公开(公告)号：JPH05144040A
公开(公告)日：1993-06-11
申请号：JP33159391
申请日：1991-11-21
Applicant: CANON KK
Inventor： DATE NOBUAKI
Abstract: PURPOSE:To realize a high speed access by supporting the actuator of the objective lens movably in a tracking direction with a support means and correcting the positional shift of the actuator. CONSTITUTION:A required drive quantity is generated by the workings of a DC current impresses to coils 4 and 4 and the magnetic flux of a magnetic circuit and when an actuator 1 is moved along yokes 8 and 8, the movement toward the tracking direction is allowed in the condition that parallel leaf springs are 2A and 2B are deflected and the actuator 1 is supported. In this case, the actuator 1 is given an elastic force so as to draw the circular locus of a movement by the deflections of the leaf springs 2A and 2B of a parallel linkage mechanism, a positional shift is generated in the right and left directions of an optical axis, but the optical axis is parallely moved right and left as much as the positional shift by the correction optical system and thus, an optical spot is correctly formed by the laser light.
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