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91. 发明专利

JPH0245169A LASER SCANNER 失效
公开(公告)号：JPH0245169A
公开(公告)日：1990-02-15
申请号：JP19669088
申请日：1988-08-06
申请人： SEIKO INSTR INC
发明人： KAWADA NAOKI
IPC分类号： B41J2/44 , G02B26/10 , G03G15/04 , H04N1/00 , H04N1/10 , H04N1/113 , H04N1/23
摘要： PURPOSE:To synchronize main-scanning and sub-scanning, and to enable the write start of a picture from a desired position in the direction of sub-scanning by using a pulse motor as the driving source of a sub-scanning driving means and driving the driving motor of a polygon mirror and the pulse motor by employing the same fundamental clock signal. CONSTITUTION:A rotating disk 33 is rotated and positioned at a specified position, and a picture on a liquid crystal panel 51 for yellow exposure is projected and exposed to a photosensitive film 21. When the upper section of the film 21 is irradiated with required energy, the rotating disk 33 is turned, a picture on a liquid crystal panel 52 for cyan exposure is projected and exposed onto the same photosensitive film 21, and the pictures for yellow and cyan are superposed and synthesized. Likewise, pictures for yellow, cyan and magenta are superposed onto the photosensitive film 21 and exposed. The positions of the write start of pictures onto each liquid crystal panel 51-53 are aligned by a photosensor 8 in the main-scanning direction and a pulse motor 39 and a write timing in the sub-scanning direction at that time. Accordingly, color drifts are not generated in the pictures for yellow, cyan and magenta on the film 21.

92. 发明专利

JPH0235452A IMAGE RECORDING DEVICE 失效
公开(公告)号：JPH0235452A
公开(公告)日：1990-02-06
申请号：JP18635888
申请日：1988-07-26
申请人： SEIKO INSTR INC
发明人： KAWADA NAOKI , TAKEMURA YASUHIRO
IPC分类号： B41J2/475 , G03D13/00
摘要： PURPOSE:To make it unnecessary to feed recording sheet to a range where transferring is not needed, only transferring on a part of an image, and to prevent the sticking of contents of capsules to pressuring rollers by providing an opening/closing mechanism for the pressuring rollers. CONSTITUTION:The title device is constituted so that the pressuring rollers 101 and 102 press on each other by a pressure spring 106, and their opening/ closing is carried out by an eccentric cam 105 and a cam follower 104. A capsule sheet (A), coated with micro capsules filled with developers of different colors and sensitive substance, is layered on a recording sheet (B), coated with the developer, and the image is formed on the sheet B by pressing between the before mentioned rollers. In this case, for example, at the point when the pressurized contact of the last sheet A and the sheet B is proceeded to a specified length, the cam 105 is rotated to make a space between the two rollers, making it unnecessary to feed sheet B to the range where the sheet A is not needed.

93. 发明专利

JP2001115278A METHOD FOR FORMING GROOVE FOR GENERATING DYNAMIC PRESSURE 失效
公开(公告)号：JP2001115278A
公开(公告)日：2001-04-24
申请号：JP29840399
申请日：1999-10-20
申请人： SEIKO INSTR INC
发明人： NITORI KOJI , IWAKI TADAO , KAWADA NAOKI , OTA ATSUSHI
IPC分类号： H02K7/08 , C23F1/00 , F16C17/10 , F16C33/14
摘要： PROBLEM TO BE SOLVED: To provide a method for forming grooves for generating dynamic pressure which is capable of suppressing the labor and time for processing to a lower level. SOLUTION: This method for forming the grooves for generating dynamic pressure consists in fixing a plurality of original members 10 having hollow parts penetrating in an axial direction onto a shaft 20 (a), (b), then immersing the shaft into a photoresist type solution S to be provided with corrosion resistance by exposure and drying the same to form preresist layers P on the outer peripheral surfaces of the original members 10 (c), (d), mounting cylindrical mask drums 27 formed with light opaque parts 272 in correspondence to the groove forming portions to all the outer circumferences of the original members 10 (e), making the portions exclusive of the groove forming positions among the preresist layers P corrosion resistant by irradiation with light from the outside of the mask drums 27 (f) and immersing the original members 10 into an etchant E to each the groove forming portions (h), then removing the resist layers R remaining on the surfaces of the original members 10.

94. 发明专利

JP2001069774A OPERATION CONTROL METHOD FOR FLUID BEARING MOTOR 失效
公开(公告)号：JP2001069774A
公开(公告)日：2001-03-16
申请号：JP24014999
申请日：1999-08-26
申请人： SEIKO INSTR INC
发明人： OTA ATSUSHI , IWAKI TADAO , KAWADA NAOKI , OKI SHIGERU , OGAWA SHINJI
IPC分类号： H02P1/46 , F16C17/00
摘要： PROBLEM TO BE SOLVED: To start a fluid bearing motor smoothly even under low temperature. SOLUTION: When a fluid bearing motor 101 is started, a heating current control unit supplies a heating current, having a level corresponding to an outer air temperature detected by a temperature sensor, to the winding 8B of a motor coil 8 through an inverter. Consequently, a hydrodynamic bearing 4 is warmed to decrease the viscosity of lubricant for generating a dynamic pressure pooled thereat thus ensuring smooth starting of the fluid bearing motor 101.

95. 发明专利

JP2001069718A HYDRAULIC BEARING MOTOR AND HARD DISK DRIVER USING THIS 失效
公开(公告)号：JP2001069718A
公开(公告)日：2001-03-16
申请号：JP24015099
申请日：1999-08-26
申请人： SEIKO INSTR INC
发明人： OTA ATSUSHI , IWAKI TADAO , KAWADA NAOKI , OKI SHIGERU , OGAWA SHINJI
IPC分类号： H02K5/16 , F16C17/10 , H02K7/08
摘要： PROBLEM TO BE SOLVED: To suppress a negative pressure state inside the space of a hydraulic bearing motor generated by the motor. SOLUTION: In a hydraulic bearing motor composed by fitting cap-shaped hubs 3 to a base 2 by the use of a dynamic pressure bearing 4 freely-rotatably, labyrinth seals 20 are provided in the confronting parts between the base 2 and the hubs 3. Since air at the peripheries of the hubs 3 enters a motor space 10 through minute gaps 24 by the rotation of the hubs 3, air inside the motor space 10 is prevented from passing through the minute gaps 23 and escaping outside, and a negative pressure state inside the motor space 10 is suppressed.

96. 发明专利

JP2001065555A GAS DYNAMIC PRESSURE BEARING AND SPINDLE MOTOR 失效
公开(公告)号：JP2001065555A
公开(公告)日：2001-03-16
申请号：JP24015199
申请日：1999-08-26
申请人： SEIKO INSTR INC
发明人： OTA ATSUSHI , IWAKI TADAO , KAWADA NAOKI , NITORI KOJI
IPC分类号： H02K7/08 , F16C17/10 , F16C33/10 , H02K21/22
摘要： PROBLEM TO BE SOLVED: To provide a gas dynamic pressure bearing and a spindle motor capable of providing large spindle rigidity even at a low speed rotation. SOLUTION: A cylindrical spindle 12 formed with dynamic pressure generating groove G1-G3 is provided in a fixed spindle 11 and surrounded by a rotating sleeve 14. A gap 15 between the fixed spindle 11 and the rotating sleeve 14 is provided with a magnetic fluid seal 16, and the fixed spindle 11 is provided with a gas outlet hole 11B for spilling dynamic pressure acting on the magnetic fluid seal 16 to the outside. Gas inlet hole 14A-14D are also provided to cancel negative pressure generated at a boundary between a thrust spindle and a radial spindle of the rotating sleeve 14.

97. 发明专利

JP2001065551A LIQUID DYNAMIC PRESSURE BEARING, MOTOR, AND ROTOR DEVICE 失效
公开(公告)号：JP2001065551A
公开(公告)日：2001-03-16
申请号：JP23654999
申请日：1999-08-24
申请人： SEIKO INSTR INC
发明人： NITORI KOJI , IWAKI TADAO , KAWADA NAOKI , OTA ATSUSHI
IPC分类号： H02K7/08 , F16C17/10 , F16C33/10
摘要： PROBLEM TO BE SOLVED: To provide a liquid dynamic pressure bearing causing less wear and damage to a member at the time of resting and at a low speed rotation of a rotor while providing excellent durability. SOLUTION: This liquid dynamic pressure bearing is provided with a stator part 10 comprising a cylindrical supporting hole 11a opened at one end, a rotor part 20 comprising a shaft 21 relatively rotatably provided in the supporting hole 11a, magnetic fluid F laying between the stator part 10 and the shaft 21 in the supporting hole 11a of the stator part 10, dynamic pressure generating grooves 25a, 25b, 25c to generate dynamic pressure between the stator part 10 and the shaft 21 by involving the magnetic fluid F at the time of relative rotation of the shaft 21 to the stator part 10, and magnets M1, M2 magnetically attracting the magnetic fluid F to an adjacent part of the shaft 21 to the stator part 10.

98. 发明专利

JP2001056021A FLUID DYNAMIC PRESSURE BEARING, MOTOR AND ROTOR DEVICE 失效
公开(公告)号：JP2001056021A
公开(公告)日：2001-02-27
申请号：JP23089199
申请日：1999-08-17
申请人： SEIKO INSTR INC
发明人： NITORI KOJI , IWAKI TADAO , KAWADA NAOKI , OTA ATSUSHI
IPC分类号： H02K5/16 , F16C17/10 , H02K7/08
摘要： PROBLEM TO BE SOLVED: To support a rotor with large rigidity while restraining a load small at rotation. SOLUTION: A retreating part B which retreats from a stator part 10 and whose distance from the stator part 10 is larger than the downstream part, is formed on the upstream part in a storing direction of oil by herring bone grooves 25b, 25c on a plate part 23 on a fluid bearing having a rotor part 20 including a shaft 21 having the plate part 23 extended in the radial direction, the stator part 10 having a support hole 11a in which the shaft 21 is installed free to rotate, fluid interposed between the stator part 10 and the shaft 21 in the support hole 11a of the stator part 10 and the herringbone grooves 25b, 25c to generate dynamic pressure in the thrust direction by storing fluid as well as formed on the plate part 23.

99. 发明专利

JP2001045705A FLUID BEARING MOTOR AND HARD DISK DRIVE THERWITH 失效
公开(公告)号：JP2001045705A
公开(公告)日：2001-02-16
申请号：JP21835199
申请日：1999-08-02
申请人： SEIKO INSTR INC
发明人： OTA ATSUSHI , IWAKI TADAO , KAWADA NAOKI , NITORI KOJI
IPC分类号： G11B19/20 , F16C17/02 , H02K7/08 , H02K21/22
摘要： PROBLEM TO BE SOLVED: To facilitate positional adjustment of the magnet center of a magnetic circuit part in a fluid bearing motor. SOLUTION: This fluid bearing motor 10, formed by mounting a magnet 16 on a hub 11 fitted on a support shaft 14 via a dynamic-pressure bearing 15 and mounting a motor coil 17 on the support shaft 14 through a hole 17A, is provided with a positioning adjustment mechanism 20, having a stationary washer 22 and a movable washer 23 on the threaded rod part 21 of the leg part of the support shaft 14. By turning the movable washer 23 around the threaded rod part 21 to change the contact condition of mating surfaces 22A, 23A formed as an inclined surface, axial positioning for the supporting shaft 14 of the motor coil 17 can be conducted.

100. 发明专利

JP2001027225A HYDRODYNAMIC PRESSURE BEARING MADE OF RESIN, AND SPINDLE MOTOR 失效
公开(公告)号：JP2001027225A
公开(公告)日：2001-01-30
申请号：JP19696799
申请日：1999-07-12
申请人： SEIKO INSTR INC , KAKIZAKI MAMUFACUTURING CO LTD
发明人： IWAKI TADAO , KAWADA NAOKI , OTA ATSUSHI , NITORI KOJI , HYOBU YUKITO
IPC分类号： H02K7/08 , F16C17/10 , F16C33/20
摘要： PROBLEM TO BE SOLVED: To prevent the damage during manufacture of a dynamic pressure generating groove formed simultaneously with the manufacture of bearing constituent members by resin molding in a hydrodynamic pressure bearing made of resin with a disc-like thrust bearing and a cylindrical radial bearing formed adjacently. SOLUTION: This hydrodynamic pressure bearing made of resin is composed of a flanged shaft member 1 having a resin flange part 3 and a resin shaft part 2 with its outer peripheral surface inclined at a specified angle, formed by applying resin to a metal core material 1a, and a sleeve member 4 having a resin sleeve part 4b with its inner peripheral surface inclined at the same angle as the specified angle of inclination by applying resin to the inner surface of a metal sleeve part 4a. An angle defined by the specified angle of inclination and a rotation axis is set to 5 deg.-75 deg., and the flanged shaft member 1 and the sleeve member 4 are manufactured by molding liquid crystal polymeric material.

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