公开(公告)号：CA1288461C

公开(公告)日：1991-09-03

申请号：CA561043

申请日：1988-03-10

Applicant: SONY CORP

Inventor： SAOTOME TOSHIO ,  NOGUCHI YOSHIYUKI ,  NISHIKAWA MITSUO ,  YAMAZAKI SHIGEKI

IPC: H02K21/00 ,  G11B19/20 ,  H02K7/08 ,  H02K7/09 ,  H02K21/24 ,  H02K1/06 ,  H02K29/06 ,  H04N5/781

Abstract: A flat type DC motor applicable for disc drive of an electronic still camera in which vibrations of the rotor axle are prevented without increasing manufacturing costs by providing the magnetic field between the stator and rotor to be asymmetrical so that the magnetic attracting force of the rotor to the stator is also asymmetrical. The asymmetrical attracting force causes the axle of the rotor to be urged in the same radial direction relative to the axle bearing in the stator, thus, movements of the axle in radial directions in the clearance between the axle and bearing of the stator are eliminated and the rotor rotates without vibrating.

公开(公告)号：MY102417A

公开(公告)日：1992-06-17

申请号：MYPI19880237

申请日：1988-03-08

Applicant: SONY CORP

Inventor： YAMAZAKI SHIGEKI ,  NOGUCHI YOSHIYUKI ,  NISHIKAWA MITSUO ,  SHIGEKI YAMAZAKI

IPC: H02K1/12 ,  G11B19/20 ,  H02K21/00 ,  H02K7/08 ,  H02K7/09 ,  H02K21/24

Abstract: IN A FLAT TYPE D C MOTOR (1) APPLICABLE, FOR EXAMPLE, TO A DRIVING SECTION OF AN ELECTRONIC STILL CAMERA, A MAGNETIC FIELD BETWEEN A STATOR (3) AND A ROTOR (2) IS ASYMMETRICAL SO THAT A MAGNETIC ATTRACTING FORCE OF THE ROTOR TO THE STATOR ACCORDINGLY BECOMES ASYMMETRICAL. THE ASYMMETRICAL ATTRACTING FORCE CAUSES AN AXLE (50) OF THE ROTOR (2) ALWAYS TO BE URGED RADIALLY OF A BEARING (11) OF THE STATOR (3), WHEREBY PLAY OF THE ROTOR AXLE (5) IN THE RADIAL DIRECTION IN A CLEARANCE BETWEEN THE ROTOR AXLE AND THE STATOR BEARING (11) IS CLIMINATED AND THE ROTOR (2) CAN ROTATE WITHOUT VIBRATING.(FIG 1)

公开(公告)号：GB2197991B

公开(公告)日：1990-05-02

申请号：GB8724832

申请日：1987-10-23

Applicant: SONY CORP

Inventor： NISHIKAWA MITSUO ,  MURAKAMI SOUICHI

IPC: H02K29/00 ,  G11B17/028 ,  G11B19/20 ,  H02K1/27 ,  H02K7/14

Abstract: A disc spindle motor of the axial air-gap type includes a record disc chucking portion having a center boss with a disc support surface formed around the center boss. A magnet is arranged adjacent and beneath the disc support surface to hold a magnetic central core of the record disc against the support surface. The rotor of the spindle motor has a rotor magnet affixed to a rotor yoke and facing the stator coils. The center boss and disc support of the disc chucking portion and the rotor yoke of the rotor are all integrally formed in one piece by molding a resin, such as nylon-6, with a magnetic powder, such as iron powder.

公开(公告)号：GB2197991A

公开(公告)日：1988-06-02

申请号：GB8724832

申请日：1987-10-23

Applicant: SONY CORP

Inventor： NISHIKAWA MITSUO ,  MURAKAMI SOUICHI

IPC: H02K29/00 ,  G11B17/028 ,  G11B19/20 ,  H02K1/27 ,  H02K7/14 ,  H02K1/02

Abstract: A disc spindle motor of the axial air-gap type includes a record disc chucking portion having a center boss with a disc support surface formed around the center boss. A magnet is arranged adjacent and beneath the disc support surface to hold a magnetic central core of the record disc against the support surface. The rotor of the spindle motor has a rotor magnet affixed to a rotor yoke and facing the stator coils. The center boss and disc support of the disc chucking portion and the rotor yoke of the rotor are all integrally formed in one piece by molding a resin, such as nylon-6, with a magnetic powder, such as iron powder.

公开(公告)号：GB2202387B

公开(公告)日：1991-05-22

申请号：GB8805626

申请日：1988-03-09

Applicant: SONY CORP

Inventor： SAOTOME TOSHIO ,  NOGUCHI YOSHIYUKI ,  NISHIKAWA MITSUO ,  YAMAZAKI SHIGEKI

IPC: G11B19/20 ,  H02K21/00 ,  H02K7/08 ,  H02K7/09 ,  H02K21/24

Abstract: A flat type DC motor applicable for disc drive of an electronic still camera in which vibrations of the rotor axle are prevented without increasing manufacturing costs by providing the magnetic field between the stator and rotor to by asymmetrical so that the magnetic attracting force of the rotor to the stator is also asymmetrical. The asymmetrical attracting force causes the axle of the rotor to be urged in the same radial direction relative to the axle bearing in the stator, thus, movements of the axle in radial directions in the clearance between the axle and bearing of the stator are eliminated and the rotor rotates without vibrating.

公开(公告)号：FR2612701A1

公开(公告)日：1988-09-23

申请号：FR8803230

申请日：1988-03-11

Applicant: SONY CORP

Inventor： SAOTOME TOSHIO ,  NOGUCHI YOSHIYUKI ,  NISHIKAWA MITSUO ,  YAMAZAKI SHIGEKI

IPC: G11B19/20 ,  H02K7/08 ,  H02K7/09 ,  H02K21/00 ,  H02K21/24 ,  H02K1/06 ,  H02K7/04

Abstract: A flat type DC motor applicable for disc drive of an electronic still camera in which vibrations of the rotor axle are prevented without increasing manufacturing costs by providing the magnetic field between the stator and rotor to by asymmetrical so that the magnetic attracting force of the rotor to the stator is also asymmetrical. The asymmetrical attracting force causes the axle of the rotor to be urged in the same radial direction relative to the axle bearing in the stator, thus, movements of the axle in radial directions in the clearance between the axle and bearing of the stator are eliminated and the rotor rotates without vibrating.

公开(公告)号：DE3808222A1

公开(公告)日：1988-09-22

申请号：DE3808222

申请日：1988-03-11

Applicant: SONY CORP

Inventor： SAOTOME TOSHIO ,  NOGUCHI YOSHIYUKI ,  NISHIKAWA MITSUO ,  YAMAZAKI SHIGEKI

IPC: H02K21/00 ,  G11B19/20 ,  H02K7/08 ,  H02K7/09 ,  H02K21/24 ,  H02K29/06 ,  H02K5/16

Abstract: A flat type DC motor applicable for disc drive of an electronic still camera in which vibrations of the rotor axle are prevented without increasing manufacturing costs by providing the magnetic field between the stator and rotor to by asymmetrical so that the magnetic attracting force of the rotor to the stator is also asymmetrical. The asymmetrical attracting force causes the axle of the rotor to be urged in the same radial direction relative to the axle bearing in the stator, thus, movements of the axle in radial directions in the clearance between the axle and bearing of the stator are eliminated and the rotor rotates without vibrating.

公开(公告)号：GB2202387A

公开(公告)日：1988-09-21

申请号：GB8805626

申请日：1988-03-09

Applicant: SONY CORP

Inventor： SAOTOME TOSHIO ,  NOGUCHI YOSHIYUKI ,  NISHIKAWA MITSUO ,  YAMAZAKI SHIGEKI

IPC: G11B19/20 ,  H02K21/00 ,  H02K7/08 ,  H02K7/09 ,  H02K21/24

Abstract: A flat type DC motor applicable for disc drive of an electronic still camera in which vibrations of the rotor axle are prevented without increasing manufacturing costs by providing the magnetic field between the stator and rotor to by asymmetrical so that the magnetic attracting force of the rotor to the stator is also asymmetrical. The asymmetrical attracting force causes the axle of the rotor to be urged in the same radial direction relative to the axle bearing in the stator, thus, movements of the axle in radial directions in the clearance between the axle and bearing of the stator are eliminated and the rotor rotates without vibrating.

公开(公告)号：JPS63224654A

公开(公告)日：1988-09-19

申请号：JP5596887

申请日：1987-03-11

Applicant: SONY CORP

Inventor： SAOTOME TOSHIO ,  NOGUCHI YOSHIYUKI ,  NISHIKAWA MITSUO ,  YAMAZAKI SHIGEKI

IPC: H02K21/00 ,  G11B19/20 ,  H02K7/08 ,  H02K7/09 ,  H02K21/24

Abstract: PURPOSE:To prevent shaft blurring caused by the rattle of shaft in the radial direction, by imbalancedly setting the magnet field between a stator and a rotor so that the shaft of rotor will be pressed to one direction in the radial direction of bearing of the stator. CONSTITUTION:In a brushless motor 1, a stepped section 10a to a part of a stator yoke 10 of a stator 3 is formed in projecting on the side of sheet coil 14. In rotating a rotor 2, imbalance is caused to magnetic attractive force of a rotor magnet 8 against the stator yoke 10, and the rotor magnet 8 will always be pulled to rotate to the stepped section 10a of the stator yoke 10, so that the whole of a shaft 5 for rotor 2 is pressed to one direction in the radial direction of a bearing 11 of the stator 3 and rotates under the so-called laterally pressed condition.

公开(公告)号：JPS61277354A

公开(公告)日：1986-12-08

申请号：JP11826385

申请日：1985-05-31

Applicant: SONY CORP

Inventor： INOUE RYOKATSU ,  NISHIKAWA MITSUO ,  WATANABE TOSHIYUKI

IPC: H02K3/04 ,  H02K21/24 ,  H02K29/14

Abstract: PURPOSE:To elevate an output level, and to obtain a generating signal at stable frequency by properly connecting generating wire elements annularly arranged at regular intervals in response to multipolar magnets. CONSTITUTION:When a driving coil for a motor is supplied with fixed currents, a rotor is turned, and magnetic flux by a four-pole magnet crosses generating wire elements 11a1-11a24. When the four-pole magnet is rotated at 4X2pi/28 (rad) so that a specific point on the four-pole magnet crosses four generating wire elements, a generating signal at one period is acquired. A signal obtained by adding generating signals severally induced in the generating wire elements 11a1-11a24 for a generating coil 12a and the generating wire elements 11a1-11a23 for a second generating coil 12b is acquired as a generating signal.