Patent application number | Description | Published |
20090015100 | VIBRATION WAVE DRIVEN APPARATUS AND VIBRATOR - A vibration wave driven apparatus which makes it possible to secure a required component accuracy obtained by machining and can increase a power ratio to the size of the apparatus. A plurality of contact parts are formed on one surface of an elastic vibration plate of a vibrator, and are disposed in contact with a friction member of a slider. A piezoelectric element plate is joined to the other surface of the vibration plate. Thinner parts as recessed parts are formed in the vibration plate at locations other than the contact parts, whereby the vibration plate is disposed in contact with the friction member of the slider at the contact parts. | 01-15-2009 |
20110278987 | VIBRATION WAVE ACTUATOR - Provided is a vibration wave actuator including: a vibrator including at least an electro-mechanical energy conversion element and an elastic body to which the electro-mechanical energy conversion element is joined, the elastic body including a contact portion formed therein, the vibrator being configured to provide elliptic motion to the contact portion; and a driven element that is in pressure contact with the contact portion of the vibrator, the driven element being moved by the elliptic motion, wherein the vibration wave actuator includes a vibrator holding portion that holds the vibrator via a first elastic member having a stiffness lower than that of the vibrator; and wherein a magnet is arranged on the vibrator holding portion, the driven element includes a magnetic substance, and the contact portion of the vibrator and the driven element are brought into pressure contact with each other by an attraction force of the magnet. | 11-17-2011 |
20110304242 | VIBRATION-TYPE DRIVING DEVICE - A vibration-type driving device according to the present invention includes a plurality of vibrators in which contact portions perform an elliptical motion using a combination of vibrations in different vibration modes; and a driven object having contact regions that come into contact with the contact portions and move relative to the plurality of vibrators, wherein the contact regions for the individual vibrators differ in position so as not to overlap. | 12-15-2011 |
20120146459 | VIBRATION TYPE DRIVING APPARATUS - A vibrator according to an aspect of the present invention is provided with an adjustment region which is realized with use of an electro-mechanical energy conversion element that is designed for an adjustment on a resonance frequency, and an impedance element is arranged to be connected to the adjustment region. | 06-14-2012 |
20120248934 | VIBRATION WAVE DRIVING APPARATUS - Provided is a vibration wave driving apparatus which can restrain increases in the number of components and in necessary space and which can maintain a stable contact state of frictional surfaces of a vibrator and a driven body. | 10-04-2012 |
20130113339 | VIBRATION TYPE DRIVING DEVICE - A vibration type driving device includes a vibrator configured to make an elliptic motion of a contact portion by combining vibrations in different vibration modes, and a driven body configured to be rotated relative to the vibrator by the elliptic motion while being in contact with the contact portion. A contact pressure of the contact portion with the driven body is lower on a radial inner side than on a radial outer side in a radial direction of the rotation. | 05-09-2013 |
20140125200 | VIBRATION WAVE ACTUATOR - A vibration wave actuator includes a vibrator, a driven element, and a magnet. The vibrator has at least an electro-mechanical energy conversion element and an elastic body to which the electro-mechanical energy conversion element is joined, the elastic body including a contact portion. The driven element is in pressure contact with the contact portion of the vibrator, and includes a magnetic substance. The magnet is arranged such that the vibrator is placed between the driven element and the magnet. | 05-08-2014 |
20140152149 | VIBRATION-TYPE DRIVING DEVICE - A vibration-type driving device according to the present invention includes a plurality of vibrators in which contact portions perform an elliptical motion using a combination of vibrations in different vibration modes; and a driven object having contact regions that come into contact with the contact portions and move relative to the plurality of vibrators, wherein the contact regions for the individual vibrators differ in position so as not to overlap. | 06-05-2014 |