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公开(公告)号：JPH0991584A
公开(公告)日：1997-04-04
申请号：JP26645395
申请日：1995-09-20
Applicant: SONY CORP
Inventor： MORO SHUJI , SAKAMOTO SATOSHI , NISHIDA YASUO , OSHIMA EIJI
Abstract: PROBLEM TO BE SOLVED: To eliminate the restrictions of the quantity of rotation on the base of a turntable and securely transmit signal data to a signal ource by supplying electric power from the base to the turntable side in a noncontact manner and sending and receiving signal data as light signal data between the base and turntable in a noncontact manner. SOLUTION: The turntable is equipped with, for example, a video camera M and the turntable 12 rotates on the base 10, so that the device is used as, for example, a video monitor device for security. A noncontact power supply part 14 is provided opposite the base 10 and turntable 12 and supplies electric power to the 2nd processing circuit 44 of a noncontact signal transmission processing means 16 and the video camera M on the side of the turntable 12 without contacting. The noncontact signal transmission processing means 16 sends and receives the signal data of the video camera M as a signal source between the base 10 and turntable 12 as the light signal data through the hollow part 20a of a shaft 20 in a noncontact manner.
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公开(公告)号：JPH08322190A
公开(公告)日：1996-12-03
申请号：JP15086395
申请日：1995-05-25
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , NAKAYAMA AKIHITO , MORO SHUJI
Abstract: PURPOSE: To realize highly precise high speed feeding at low cost using a DC motor by constituting a small-sized simple linear feeder. CONSTITUTION: The linear feeder comprises a drive source 11, a lead screw 12 provided integrally on the rotary shaft of drive source, a nut member 13 screwed to the lead screw, a magnet 14 fixed to the rotary shaft of drive source while being magnetized alternately with N and S poles in the circumferential direction, and a magnetoresistive effect element 15 fixed oppositely to the magnet. The magnetoresistive effect element has a magnetosensitive part comprising a basic magneto-sensitive pattern extending normally to the circumferential direction of the magnet. A DC voltage is applied across the magneto-sensitive part and an output is taken out from the neutral point. In such linear feeder 1O, the basic magneto-sensitive pattern extends obliquely to the direction normal to the circumferential direction.
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公开(公告)号：JPH07120653A
公开(公告)日：1995-05-12
申请号：JP26890293
申请日：1993-10-27
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , KAWAMURA HIROSHI , ORIMO SHINICHI
Abstract: PURPOSE:To prevent the limitation of moving range and reduction in moving speed due to wiring of a movable member, smoothly move the movable member according to the current supply to a coil, substantially uniform the thrust added to the movable member, and facilitate the position control of the movable member. CONSTITUTION:The electromagnetic driving device has a fixed member 2 having an outside yoke 7, an inside yoke 6, and a thrust generating magnet 9 fixed to either one of the outside yoke 7 and the inside yoke 6, a lens holder for holding a lens l0, and an A-phase coil C1 and B-phase coil C2 axially wound between the outside yoke 7 and the inside yoke 6. This device also has a movable member 5 axially movable to the fixed member 2, the movable member 3 has a position detecting magnet 20 for position detection, and the fixed member 2 has a Hall element 26 for detecting the magnetic field from the position detecting magnet 20 to detect the position of the movable member 3 and generating a position detection signal for controlling the current supply to the coils C1 and C2.
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公开(公告)号：JPH0622394B2
公开(公告)日：1994-03-23
申请号：JP451783
申请日：1983-01-14
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , UZUKA MITSUO
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公开(公告)号：JPH02119555A
公开(公告)日：1990-05-07
申请号：JP27280488
申请日：1988-10-28
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: PURPOSE:To improve accuracy by inclining the pattern of magnetic sensitive resistance elements formed by resistance-value division of reference potential to the pattern of a plurality of magnetic sensitive resistance elements arranged so as to face magnets for detecting the revolution of a body of revolution and alternately bringing the two patterns close to each other. CONSTITUTION:FG magnets 5 are shaped onto the outer circumferential surface of a magnet 2 for driving a rotor 1 while being alternately magnetized at N and S at regular magnetizing pitches lambda. A magnetic sensitive resistance element sensor 7 is fixed to a stator not shown by a fixing member 7c. The sets A-D and E-H of the magnetic sensitive resistance elements are arranged to the sensor 7 at the intervals of 3/8lambda in a sensor pattern 7a, and the A-D and E-H of each set are disposed at lambda/4 and the FG magnets 5 are detected. A reference- positional preparation pattern 7b is folded back at a middle point X, and divided into mutually adjacent I and J groups, and the direction of a magnetic field is inclined at a approximately 20 deg. to the FG magnets 5. Accordingly, detection being stable to a temperature change and having high accuracy is conducted.
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Patent Agency Ranking
公开(公告)号：JPH0297261A
公开(公告)日：1990-04-09
申请号：JP24774188
申请日：1988-09-30
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , YAMAZAKI SHIGEKI , MARUYAMA TAKAO
Abstract: PURPOSE:To obtain a sine-wave magnetization without generating low- temperature demagnetization and high-temperature demagnetization by maximizing a magnetizing width in the center of a magnetic pole and by decreasing said magnetizing width or increasing a reversed polarity magnetizing part as the magnetizing part is closer to the edge part relative to an adjacent magnetic pole. CONSTITUTION:Magnetic poles 4 of a hollow cylindrical magnet 1 are alternately formed in a reversed polarity manner. The broad width part 4a of the vertical width of the magnetic pole 4 faces a coil 2 and the narrow width part 4b thereof, a Hall element 3. In respective parts 4a, 4b of the magnetic pole 4, the magnetizing width of the vertical magnetizing part 4c is maximized in the central part C of the pole 4, and the magnetizing width is decreased curvilinearly as the magnetizing part is closer to the edge part D being the boundary between the pole and an adjacent pole. Thus, a magnetic flux received by the coil 2 and Hall element 3 can be made in sine waves or nearly into sine waves.
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公开(公告)号：JPS6418015A
公开(公告)日：1989-01-20
申请号：JP17423387
申请日：1987-07-13
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: PURPOSE:To enable the detection of a low consumption power at a high accuracy without lowering an output, by arranging a magnetosensitive sensor to have magnetosensitive elements placed with magnetic poles set at an interval of roughly 1/4 thereof in the same polarity and jump-connected in series to form one side of a detection circuit while grouping those performing the resistance changing in the same phase as one set. CONSTITUTION:Eight magnetosensitive elements A-H as indicated by Fig. (a) are arranged as opposed to one another on a plane with magnetic poles of the same polarity at an interval lambda of almost 1/4 as magnetized on an FG magnet 5. Sets of magnetosensitive elements A, C, E and G and B, D, F, H receive magnetic fields in the direction roughly vertical to the plane or in the direction of the plane separately as indicated by the arrow and the resistance thereof remains unchanged or decreases. These sets are built each reciprocating as indicated by a wire pattern of Fig. (b), jump-connected in series to form a bridge circuit in Fig. (c). The sets of A and C, F and H, B and D and E and F are connected to each other in series per set between a power source Vcc and the ground G. Then, an FG output is obtained indicating the state of rotation from an intermediate potential difference between midpoints x and y.
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公开(公告)号：JPS63268460A
公开(公告)日：1988-11-07
申请号：JP10403787
申请日：1987-04-27
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI , NAKAHARA TORU
Abstract: PURPOSE:To improve an output and performance by forming a conductor pattern for detection so as to surround the base section of an output terminal section. CONSTITUTION:A printed substrate 5 is formed to a circular shape in conformity with the shape of a rotor for a motor, and a conductor pattern is formed by a printed wiring by using only one surface of the substrate 5. A fitting hole 5a for fitting to a fixed shaft is bored at the central section of said substrate 5. A conductor pattern 10 for a frequency generator is shaped where (near the outside of the circular surface of the printed substrate 5) surface-opposed to a magnet for the rotor, and connected to rounds 12a, 12b. A round 12 conducting and fixing a terminal 9a is wired at one end of a conductor pattern 15 for the pulse generator. Accordingly, even when the conductor pattern 15 is formed around the base section of an output terminal 6, the winding-end of the conductor pattern is formed to a shape that it is connected directly to a terminal 12c, thus eliminating the need for a wiring for leading-out.
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公开(公告)号：JPS63161893A
公开(公告)日：1988-07-05
申请号：JP31379786
申请日：1986-12-24
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
Abstract: PURPOSE:To prevent the generation of electromagnetic sound, and to reduce vibrations by using a driving current waveform in the vicinity of phase changeover by linearly amplifying a waveform from a magnetic detector. CONSTITUTION:Drive coils L1, L2 are arranged concentrically to a stator for a two-phase brushless motor at a regular interval, and Hall elements H1, H2 are mounted. N poles and S poles are disposed alternately in the circumferential direction and magnetized in a rotor, and angular ranges AS in S-pole magnetizing regions facing the Hall elements H are made wider than N-pole sides AN. A driver circuit for the motor is constituted of differential linear amplifiers 1, 2 with two operational amplifiers A1, A2. Accordingly, output voltage from the Hall elements H1, H2 slowly fluctuating with the revolution of the rotor is amplified in a waveform as it is and output from the operational amplifiers A1, A2, and the inclinations of the rise and fall of the driving currents of the coils L1, L2 turned ON/OFF by transistors TR1, TR2 are made gentle.
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公开(公告)号：JPS6220608B2
公开(公告)日：1987-05-08
申请号：JP7299077
申请日：1977-06-20
Applicant: SONY CORP
Inventor： SAKAMOTO SATOSHI
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