Canon Kabushiki Kaisha

Seiko Instruments Inc

Wd Media (singapore) Pte. Ltd.

Seiko Seiki Kabushiki Kaisha

Hoya Corporation

Mitsubishi Jukogyo Kabushiki Kaisha

Taiheiyo Cement Corporation

Nihon Ceratec Co., Ltd.

Calsonic Compressor Manufacturing Inc.

Akira Shimada

Tsunenori Ashibe

Atsushi Tanaka

Akio Maruyama

Hiroki Uematsu

Minoru Shimojo

Akihiko Nakazawa

Takashi Kusaba

Hidekazu Matsuda

Harunobu Ogaki

Masataka Kawahara

Toshihiro Kikuchi

Atsushi Ochi

Takayuki Sumida

Akio Koganei

Kyoichi Teramoto

Hiroyuki Kobayashi

Yoshinobu Ohtachi

Hiroyuki Osada

Koichi Suzuki

Koichi Nakata

Tatsuya Ikezue

Shoji Amamiya

Shintetsu Go

Shuji Ishii

Kazuma Sato

Takahiro Mitsui

Tsutomu Mita

Yutaka Maruyama

Yoshio Kashizaki

Norio Yokoshima

Makoto Watanabe

Toshihiro Ifuku

Akio Atsuta

Hiroyuki Seki

Daisuke Sato

Atsushi Kimura

Masashi Matsumoto

Takashi Anezaki

Takao Mori

Takahiro Onoue

Kaishi Ohashi

Kenji Inoue

Yoshiaki Sonobe

Satoshi Tsuchiya

Hirotoshi Uesugi

Kei Suefuji

Yongwei Shi

Toshikuni Sera

Hirotaka Namiki

Masahide Nagai

Mitsugi Suehiro

Tsuyoshi Ozawa

Masanori Aniya

Ikuo Muto

Shinichi Ishibashi

Mei Inoue

Yutaka Inada

Yuu Itou

Ito Nakamura

Kenzou Nonami

Yutaka Segawa

Hideshi Kamiya

Hiroyuki Sakamaki

Hiroyuki Makinoshima

Shoji Kawase

A vibration type actuator comprises a vibrator including an electro-mechanical energy conversion element and an elastic member; a holding member holding the vibrator; a guide member guiding the vibrator and the holding member in a first direction; a contact member in contact with the vibrator; and a pressure member pressurizing the vibrator and the contact member in a second direction intersecting the first direction. The vibrator and the contact member generate power activating in the first direction by a vibration of the vibrator, the holding member engages with the guide member to be rotatable around, as an axis, a third direction intersecting the first and the second directions, the holding member has a recess where the vibrator is held, and an output portion transmitting the power is formed on a part of a wall surface on which the recess is formed.

Vibration type actuator, imaging apparatus, and electronic equipment

A vibration-type actuator includes a vibrator, a contact member, a ball, and a base table having a third guide. The vibrator has an elastic member and an energy conversion element. The contact member is fixed to the base table, contacts the elastic member, and extends in a predetermined direction. The vibrator and the contact member are driven along the predetermined direction due to a vibration generated by a voltage applied to the energy conversion element. A first guide provided on the contact member extends in the predetermined direction and a second guide that is connected with the vibrator faces the first guide and moves integrally with the vibrator. The ball is held between the first guide and the second guide rollably in the predetermined direction. The second guide extends in the predetermined direction and includes a fitting projection portion loosely fitted to a groove portion provided on the third guide.

Vibration-type actuator, and optical apparatus and electronic apparatus including the same

A vibration wave driving apparatus includes a vibration actuator; and a driven member configured to be driven by the vibration actuator. The vibration actuator includes a vibrator having an electric-mechanical energy conversion element and an elastic member to which the electric-mechanical energy conversion element is fixed; a pressurizing member configured to pressurize the vibrator; a contacting member configured to pressurizing-contact with the vibrator by pressurizing the vibrator by the pressurizing member and move relative to the vibrator; and an outputting member configured to output a driving force to the driven member, the driving force generated by the movement of the contacting member relative to the vibrator. The driven member includes an output transmission member configured to hold the outputting member in a direction of the relative movement with a predetermined spring force.

Vibration wave driving apparatus and image pickup apparatus using output transmission member

A vibration wave motor, includes a vibrator including an electro-mechanical energy conversion element and an elastic body, and a contact body, wherein the elastic body includes a flat plate portion on which the electro-mechanical energy conversion element is fixed, and a protruding portion, wherein the protruding portion includes a contact portion, a side wall portion, and a coupling portion that is configured to couple the contact portion and the side wall portion, and wherein a predetermined inequality is satisfied, where a thickness of the side wall portion in a direction orthogonal to the pressure direction is t, and a distance in the pressure direction from a second surface of the flat plate portion to the coupling portion is h, the second surface of the flat plate portion facing a first surface of the flat plate portion on which the electro-mechanical energy conversion element is fixed.

Vibration wave motor and imaging apparatus and electronic apparatus including vibration wave motor

Provided is a vibration wave driving apparatus comprising: a vibration actuator; and a driven member configured to be driven by the vibration actuator, wherein the vibration actuator includes: a vibrator having an electric-mechanical energy conversion element and an elastic member to which the electric-mechanical energy conversion element is fixed; a pressurizing member configured to pressurize the vibrator; a contacting member configured to pressurizing-contact with the vibrator by pressurizing the vibrator by the pressurizing member and move relative to the vibrator; an outputting member configured to output a driving force to the driven member, the driving force generated by the relative-moving of the contacting member to the vibrator, and wherein the driven member includes an output transmission member configured to hold the outputting member in a direction of the relative-moving with a predetermined spring force.

Vibration wave driving apparatus and image pickup apparatus

A drive control device, which controls driving of a vibration type actuatorincluding a vibratorthat includes a piezoelectric element, and a rotor, includes amplifier circuitsandamplifying a power supply voltage to generate a drive voltage to be applied to the piezoelectric element, and a microcomputer unit. The microcomputer unitperforms a control to increase the amplitude of the drive voltage to perform acceleration from when the vibration type actuatoris started to when a target speed of the rotoris reached, decrease the frequency of the drive voltage without changing the amplitude of the drive voltage when power supplied to the piezoelectric elementexceeds a first power limit P-Lim, and increase the amplitude of the drive voltage when the power falls below a second power limit P-Limduring an operation of decreasing the frequency.

Drive control device and drive control method that enable stable output to be obtained from vibration type actuator, vibration type drive device including vibration type actuator, and apparatus

A vibration type actuator includes a vibrating body including an elastic body and an electro-mechanical energy conversion element, a contact body contacting the vibrating body, a flexible printed board provided with a concave portion on a surface opposite to a surface contacting the electro-mechanical energy conversion element and configured to supply electric power to the electro-mechanical energy conversion element, and a holding member provided with a projection portion engaging with the concave portion.

Vibration type actuator, optical apparatus, and electronic apparatus

A vibration wave motor includes a vibrator including an electrical-mechanical energy conversion element and an elastic member, a contact member in contact with the elastic member, and a supporting member that supports the vibrator, wherein the supporting member supports an outer periphery portion of the vibrator so as to be movable along a direction in which the vibrator is pressed toward the contact member, and selectively supports a node of a vibration of the vibrator.

Vibration wave motor and electronic apparatus having an electrical-mechanical energy conversion element

A vibration actuator includes an electro-mechanical transducer, a vibrating body fixed to the electro-mechanical transducer, the vibrating body being vibrated by applying a voltage to the electro-mechanical transducer, and a driven body contacting the vibrating body. The driven body is frictionally driven by a vibration of the vibrating body. The driven body includes a first extended portion extending from a main body portion of the driven body towards an inside diameter side of the vibrating body, a second extended portion extending from the first extended portion towards the outside diameter side of the vibrating body, and a contact surface provided at a tip of the second extended portion. The contact surface contacts the vibrating body. The first extended portion, the second extended portion, and the contact surface are each capable of elastically deforming in a rotational axis direction of the driven body.

Vibration actuator

A vibration actuator includes a vibrator including a shaft, an output transmission member penetrated by the shaft, and configured to rotate about the axis of the shall, and a fixed member configured not to move relative to the shaft and configured to move relative to the output transmission member. The fixed member includes a base portion and a projection portion protruding from the base portion to the output transmission member side, the vibration actuator includes a pressure reception member between the base portion and the output transmission member in an axial direction of the shaft, and wherein the projection portion and the output transmission member are in contact with each other in a direction orthogonal to the axial direction of the shaft, and the projection portion and the output transmission member are not in contact with each other in the axial direction of the shaft.

Vibration actuator and electronic device including the same

A vibration-type actuator that is capable of reducing an unnecessary vibration during driving includes a vibration body configured by connecting an electro-mechanical energy conversion element and an elastic body. A driven body is in pressure contact with the vibration body. A controller moves the vibration body and the driven body relatively by a vibration that is excited in the vibration body by applying driving voltage to the electro-mechanical energy conversion element so that a difference between a resonance frequency in a natural vibration mode of the vibration body that is higher than an upper limit frequency of a predetermined driving frequency range and that is nearest to the upper limit frequency and a frequency of the driving voltage is greater than a difference between a resonance frequency in a natural vibration mode used for moving the vibration body and the driven body relatively and the frequency of the driving voltage.

Vibration-type actuator, driving method for vibration-type actuator, and electronic apparatus equipped with vibration-type actuator

A vibration driving device that is capable of exciting a vibration of desired amplitude with a low voltage. A vibration body has a plate-like elastic body and an electro-mechanical energy conversion element that is joined to the elastic body. A control unit excites a vibration in a first vibration mode and a vibration in a second vibration mode in the vibration body by applying alternation voltages to the electro-mechanical energy conversion element. Orders or numbers of nodes of the vibrations in the first and second modes in a first direction that intersects perpendicularly with a thickness direction of the elastic body are mutually different by one. And orders or numbers of nodes of the vibrations in the first and second modes in a second direction that intersects perpendicularly with the thickness direction of the elastic body and the first direction are mutually different by one.

Driving method for vibration body, vibration driving device, and image pickup apparatus

The present invention provides a vibration-type actuator that makes it possible to improve and stabilize yields. A vibration-type actuator includes a vibrator including an elastic body with a protrusion having a contact portion, and an electromechanical transducer attached to a surface of the elastic body; and a flexible printed circuit board having an electrode portion and attached to the electromechanical transducer. There is a space between the contact portion and the electromechanical transducer. No end portion of the electrode portion of the flexible printed circuit board is overlapped with the space in a direction perpendicular to the surface of the elastic body.

Vibration-type actuator, interchangeable lens, image pickup apparatus, and automatic stage

Method for manufacturing an optical lens in which coating solution curing conditions are satisfied and a coating solution is cured. The coating solution curing conditions include the angle of the axis of an optical lens substrate with respect to the horizontal direction falls within a predetermined angle range, and a second condition that the optical lens substrate rotates around the axis at a predetermined rotational speed. The predetermined angle range is between a maximum inclination angle of the axis at which the peripheral edge of a lens surface is positioned at the highest position of the lens surface, and a maximum inclination angle of the axis at which the peripheral edge of the lens surface is positioned at the lowest position of the lens surface. The predetermined rotational speed is a speed at which the coating solution applied to the lens surface is held in a coating position.

Method for manufacturing optical lens

A vibration-type driving device includes a vibrator including an electro-mechanical transducer and an elastic portion supported by a shaft, and a rotor the position of which relative to the vibrator changes. The rotor includes a first rotor having a threaded portion engaging with a first threaded portion formed on the elastic portion, and a second rotor having a threaded portion engaging with a second threaded portion formed on the shaft. The first rotor and the second rotor are configured to be driven integrally with each other, with a spring member between the first rotor and the second rotor.

Vibration-type driving device

Growing community of inventors

Saitama, Japan

Akira Shimada