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1. 发明专利

JPH04125077A ULTRASONIC WAVE MOTOR 失效
公开(公告)号：JPH04125077A
公开(公告)日：1992-04-24
申请号：JP24408790
申请日：1990-09-17
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO , MASUKO TSUTOMU
IPC分类号： H02N2/00
摘要： PURPOSE:To obtain an ultrasonic wave motor used for a card reader/writer having a small size and a large torque by opposing a piezoelectric longitudinal vibrator for vibrating to elongate and contract to the end of a piezoelectric twisting vibrator for vibrating to twist, and interposing a ringlike or disclike rotor between the ends of the vibrators. CONSTITUTION:One end of a longitudinal vibrator 8 is secured to a support 10, which is supported by a bearing 11, one end of a piezoelectric twisting vibrator 6 is similarly secured to a support 12, which is supported by a bearing 13, the other ends 10, 12 of the vibrators 6, 8 are opposed, a rotor 14 rotatably supported by the bearings 11, 13 is interposed between the ends of the vibrators 6 and 8, and a roller 15 integrally rotated with the rotor 14 is so formed as to include a piezoelectric ceramic hollow columnar longitudinal-twisting vibrator. At least one of the bearings 11, 13 is axially energized to the rotor 14 to press the ends of the vibrators 6, 8.

2. 发明专利

JPH03181814A PIEZOELECTRIC OSCILLATING GYRO 失效
公开(公告)号：JPH03181814A
公开(公告)日：1991-08-07
申请号：JP32048289
申请日：1989-12-12
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO
IPC分类号： G01C19/56 , G01C19/5698
摘要： PURPOSE:To make the structure simple by providing first inclining electrodes as first two terminals and second longitudinal electrodes as second two terminals to an axial direction of a piezoelectric hollow cylinder of ceramic, and using the one as input terminals and the other as output terminals. CONSTITUTION:Electrodes 15, 16 are formed in the outer peripheral surface of the central part of a piezoelectric hollow cylinder 14 of ceramic with an inclination of 45 deg. to the axial direction of the cylinder. The inclining electrodes 15, 16 are connected to common electrodes 15', 16', thereby constituting first two terminals. Moreover, longitudinal electrodes 17, 18 are formed in the vicinity of an end of the cylinder 14 and connected to coupling electrodes 17', 18', thus constituting second two terminals. When a direct current high voltage is impressed between the electrodes 15' and 16', the ends of the cylinder 14 resonate to be twisted. If the cylinder 14 is rotated in this state, an expanding vibration is brought about in the vicinity of the ends of the cylinder 14 in a direction perpendicular to the twisting direction by the Coliolis' action. As a result, an output voltage is generated between the electrodes 17 and 18, which is detected between the second two terminals. Since the detected output voltage is proportional to the size of the twisting vibration and rotating angular velocity, the rotating angular velocity can be detected by controlling the twisting vibration constant.

3. 发明专利

JPH0316188A PIEZOELECTRIC ELLIPTIC MOVEMENT OSCILLATOR 失效
公开(公告)号：JPH0316188A
公开(公告)日：1991-01-24
申请号：JP31184488
申请日：1988-12-12
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO
IPC分类号： B06B1/18 , H01L41/09 , H02K37/24 , H02N2/00
摘要： PURPOSE:To reduce an irregularity in a resonance frequency in a bending mode by a method wherein electrodes are executed in positions which divide an outer circumference face of a piezoelectric ceramic hollow cylinder into four, a direct-current voltage is applied and is polarized in a circumferential direction or a diameter direction and a first alternating-current voltage which is equal to a resonance frequency of piezoelectric elliptic movement oscillator is applied. CONSTITUTION:A first split electrode to a fourth split electrode 11 to 14 are executed in parallel along a length direction of a piezoelectric ceramic hollow cylinder 11 in positions which divide an outer circumference face of the hollow cylinder 10. The first and third split electrodes 11, 13 which are faced mutually are connected electrically by using a first connection wire 15; the second and fourth electrodes 12, 14 are connected by using a second connection wire 16. In addition, a first AC voltage whose frequency is equal to a resonance frequency of the piezoelectric ceramic hollow cylinder 10 and which is provided with a first phase is applied between the first and fourth split electrodes 11, 14 and between the second and third split electrodes 12, 13 so that a bending oscillation can be excited at the piezoelectric ceramic hollow cylinder 10. Thereby, a high-accuracy processing operation can be executed; an irregularity in the resonance frequency in mutually perpendicular directions can be reduced.

4. 发明专利

JPH02299477A ULTRASONIC MOTOR 失效
公开(公告)号：JPH02299477A
公开(公告)日：1990-12-11
申请号：JP5210889
申请日：1989-03-06
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , TAMURA MITSUO , YOSHIDA TETSUO
IPC分类号： H01L41/09 , H02N2/00
摘要： PURPOSE:To set the diameter of a rotor to 10mm or less and to reduce a cost by providing a vibration/rotation converting member on the outer periphery of cylindrical piezoelectric ceramics. CONSTITUTION:An ultrasonic motor 10 is composed of a collar 17, a screw 18, a stationary shaft 21, a ringlike frictional member 23, a rotor 25, etc. A piezoelectric elliptical vibrator of the motor 10 is formed of cylindrical piezoelectric ceramics 11, and first - fourth split electrodes 1-4 are provided in parallel with the longitudinal direction. As a result, since the antinode of vibration is provided at both ends and center of a central axis direction, and n pieces of nodes of the vibration are provided between the antinodes, a bending vibration is transmitted to the rotor 25 to rotate it.

5. 发明专利

JPH0284078A ULTRASONIC MOTOR 失效
公开(公告)号：JPH0284078A
公开(公告)日：1990-03-26
申请号：JP23380388
申请日：1988-09-20
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO , SHIRATORI AKIRA
IPC分类号： H02N2/00 , H01L41/09
摘要： PURPOSE:To obtain a miniature ultrasonic motor with the diameter of its rotor reduced small by supporting the node of vibration of a piezoelectric elliptic movement vibrator with a ring-shaped supporting frame to equalize the influence on the vibration and to allow the motor to excite stable elliptic movement. CONSTITUTION:The node of vibration of a piezoelectric ceramic column 11 is supported by a ring-shaped supporting frame 12. On both ends of the column 11 a cup-shaped rotor 13 is installed with the end of the column 11 inserted into its hollow cylinder section with minute clearance. The ring-shaped supporting frame 12 is inserted into a cylindrical outer frame 14 and fixed to it. A lead wire is pulled out from a lead wire outlet hole 16 provided to the cylindrical outer frame 14. When the end of the column 11 performs elliptic movement, the shaft of the cup-shaped rotor 13 rotates stably as it is rotatably supported by a bearing 17 inserted into the outer frame.

6. 发明专利

JPH0236776A PIEZOELECTRIC ELLIPTICAL MOTION VIBRATOR 失效
公开(公告)号：JPH0236776A
公开(公告)日：1990-02-06
申请号：JP18541488
申请日：1988-07-27
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO
IPC分类号： B06B1/06 , H02N2/00 , H03H9/17
摘要： PURPOSE:To easily assembly by providing a plurality of electrode pairs on the outer periphery of a piezoelectric ceramic column, polarizing the column in a direction perpendicular to a longitudinal direction, and applying an AC voltage thereto. CONSTITUTION:Electrodes 2-5 are formed in parallel with its longitudinal direction at quartered positions of circumference of the side face of a piezoelectric ceramic column 1. When the electrodes 2, 3 and 4, 5 of the column 1 are respectively connected, a positive voltage is applied to the electrodes 2, 3 and a negative voltage is applied to the electrodes 4, 5, a distortion is generated in its sectional direction. Thus, it is accurately formed as a piezoelectric vibrator, and an irregularity in the resonance frequency can be reduced in the perpendicular direction to each other.

7. 发明专利

JPH0579844A PIEZOELECTRIC VIBRATION GYRO 失效
公开(公告)号：JPH0579844A
公开(公告)日：1993-03-30
申请号：JP2384491
申请日：1991-01-25
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO , MASUKO TSUTOMU
IPC分类号： G01C19/56 , G01C19/5663
摘要： PURPOSE:To obtain a piezoelectric vibration gyro wherein a structure is simple, adhesive agent is not needed, a fluctuation in characteristics is small and zero balance adjustment at the time of no rotation is possible by a simple electric circuit. CONSTITUTION:2n (n is an integer of 3 or larger) stripe electrodes 2l which equally divide a circumference are formed in parallel with a lengthwise direction of a piezoelectric ceramic cylinder 10 on an outer peripheral surface of the piezoelectric ceramic cylinder 10. The piezoelectric ceramic cylinder 10 is bent and vibrated substantially in the direction of a symmetric surface by applying exciting ac voltage having frequency approximately equal to the resonant frequency of a bending vibration mode of the piezoelectric ceramic cylinder to (m) (m is a natural number) stripe electrode slits which are arranged symmetrically with respect to the surface containing the center line of one of the stripe electrodes 21 and the center axis of the piezoelectric ceramic cylinder 10. In addition, a piezoelectric vibration gyro for detecting voltage generated on one or a plurality of stripe electrode slits located symmetrically with respect to the symmetric surface can be obtained.

8. 发明专利

JPH04125076A ULTRASONIC WAVE MOTOR 失效
公开(公告)号：JPH04125076A
公开(公告)日：1992-04-24
申请号：JP24408690
申请日：1990-09-17
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO , MASUKO TSUTOMU
IPC分类号： H02N2/00
摘要： PURPOSE:To relatively increase a torque in a small size by inserting a protrusion of a stationary plate to the bore of a rotor, and bringing the plate axially into pressure contact with the rotor through an elastic element by a spring. CONSTITUTION:The end of a twisting vibrator of a longitudinal-twisting composite vibrator 10 is secured by a support 3 including a first bearing 12 so as to be excited by a twisting vibration of 1/4 wavelength. A wear resistant member layer 14 is formed on the end of the vibrator 10, the protrusion 17a of a rotor stationary plate 17 is engaged within a rotor bore 15a through a ringlike rotor 15 and an elastic element 16, and brought into pressure contact therewith by a leaf spring 18. In the case of operation, a shaft 20 which passes through the bearing 12 and a second bearing 19 is rotated integrally with the rotor 15.

9. 发明专利

JPH03235678A ULTRASONIC MOTOR 失效
公开(公告)号：JPH03235678A
公开(公告)日：1991-10-21
申请号：JP2713590
申请日：1990-02-08
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO , MASUKO TSUTOMU
IPC分类号： H01L41/09 , H02N2/00
摘要： PURPOSE:To reduce fluctuation in motor characteristics by supporting a piezoelectric vibrator which is to be a stator, at nodal points of vibration with supports comprising elastic members such as hard rubbers. CONSTITUTION:A double mode flexible vibrator 11' consisting of a piller shaped piezoelectric ceramic substance, is suspended at its nodal points of vibration with suspension rings 12 and 13 made of hard rubber, and brought into pressure contact with a cup shaped rotor 15 by using the elasticity of rubber. Therefore, the suspension rings 12 and 13 absorb change of stress imparted on a rotor shaft and fluctuation of the pressure-contact force during rotation due to dimentional changes of the rotor 15 and the double mode flexible vibrator 11'.

10. 发明专利

JPH0322876A ULTRASONIC MOTOR 失效
公开(公告)号：JPH0322876A
公开(公告)日：1991-01-31
申请号：JP15211289
申请日：1989-06-16
申请人： TOKIN CORP , SHIMIZU HIROSHI
发明人： SHIMIZU HIROSHI , YOSHIDA TETSUO
IPC分类号： H01L41/09 , H02N2/00
摘要： PURPOSE:To obtain a piezoelectric torsional oscillator, simple in working, having no bonding process and small in variability, by a method wherein an ultrasonic motor is provided with a piezoelectric torsional oscillation unit and a piezoelectric longitudinal oscillation unit while a first AC driving voltage and a second AC driving voltage are impressed on corresponding electrodes respectively. CONSTITUTION:A piezoelectric composite longitudinal-torsional oscillation unit 21 is provided with diagonal electrodes 22, 23, formed on the outer peripheral surface of the central part of a piezoelectric ceramics hollow column 20' so as to have the angle of 45 deg. with respect to the longitudinal direction of the column 20' whereby a torsional oscillation unit 21a is formed. A plurality of circumferential electrodes 24, 25 as well as the circumferential electrodes 26, 27 are formed on the outer peripheral surfaces of both end sides of the diagonal electrodes 22, 23 in parallel to the circumferential direction of the column 20' whereby longitudinal oscillation units 21c, 21c are formed. When an AC driving voltage having a first frequency is impressed on the diagonal electrodes 22, 23 and another AC driving voltage having a second frequency is impressed on the circumferential electrodes 24, 25 as well as the circumferential electrodes 26, 27, expanding oscillation is excited in the piezoelectric ceramics hollow column 20'.

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