# US 11,442,242 B2 · Vibration wave motor and lens driving device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,442,242 B2 - Document ID: US11442242B2 - Status: Granted - Kind: B2 - Application number: 16/590,682 - Filed: 2019-10-02 - Published: 2020-04-09 - Granted: 2022-09-13 - Earliest claimed: 2018-10-03 - Assignees: Canon Kabushiki Kaisha - Applicants: Canon Kabushiki Kaisha - Inventors: Ryo Abe; Makoto Oikawa; Yasufumi Yamamoto - Web page: https://patentgrep.com/patent/US11442242B2 ## CPC - G02B 7/102: {controlled by a microcomputer (cameras with interchangeable lenses G03B17/14)} - G02B 7/09: adapted for automatic focusing or varying magnification - G02B 7/38: measured at different points on the optical axis {, e.g. focussing on two or more planes and comparing image data} - G03B 3/10: Power-operated focusing - H02N 2/001: {Driving devices, e.g. vibrators} - H02N 2/0055: {Supports for driving or driven bodies; Means for pressing driving body against driven body} - H02N 2/006: {Elastic elements, e.g. springs (in general F16F1/00)} - H02N 2/026: {by pressing one or more vibrators against the driven body} - G03B 17/425: {motor drive cameras} - G03B 2205/0053: Driving means for the movement of one or more optical element - G03B 2205/0061: using piezoelectric actuators - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D) - H02N: ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR ## Abstract Provided is a vibration wave motor including: a vibrator; a friction member; a pressurizing mechanism; a first holding mechanism; and a second holding mechanism, wherein the vibrator and the friction member are configured to perform relative movement with respect to each other, wherein the first holding mechanism includes a first holding portion and a second holding portion which is longer than the first holding portion in a direction of the relative movement, wherein the friction member is arranged between the first holding portion and the second holding portion, wherein the first holding portion includes a first restriction portion, wherein the second holding portion includes a second restriction portion, and wherein the first restriction portion and the second restriction portion are brought into abutment against the second holding mechanism to restrict movement in directions other than the direction of the relative movement of the vibrator and the first holding mechanism. ## Claims ### Claim 1 A vibration wave motor comprising: a vibrator; a friction member held in friction contact with the vibrator; a pressurizing mechanism configured to pressurize the vibrator against the friction member; a first holding mechanism configured to hold the vibrator; and a second holding mechanism configured to hold the friction member, wherein the vibrator and the friction member are configured to perform relative movement with respect to each other, wherein the first holding mechanism includes a first holding portion and a second holding portion which is longer than the first holding portion in a direction of the relative movement, wherein the friction member is arranged between the first holding portion and the second holding portion, wherein the first holding portion includes a first restriction portion, wherein the second holding portion includes a second restriction portion, and wherein the first restriction portion and the second restriction portion are brought into abutment against the second holding mechanism to restrict movement in directions other than the direction of the relative movement of the vibrator and the first holding mechanism. ### Claim 2 (depends on 1) The vibration wave motor according to claim 1, wherein the second holding portion comprises a guide portion, which is configured to guide the relative movement, and is arranged on a side opposed to the vibrator and the first holding portion over the friction member. ### Claim 3 (depends on 2) The vibration wave motor according to claim 2, wherein the guide portion comprises a guide member and a rolling member, and wherein the second restriction portion is arranged on an outer side with respect to the rolling member in the direction of the relative movement. ### Claim 4 (depends on 1) The vibration wave motor according to claim 1, wherein the second holding mechanism comprises: a holding casing configured to hold the friction member; and a fixing member configured to fix the friction member to the holding casing, and wherein the holding casing is arranged on a side opposed to the second holding portion over the friction member. ### Claim 5 (depends on 4) The vibration wave motor according to claim 4, wherein, when the vibrator and the friction member perform the relative movement with respect to each other, the second holding portion overlaps with the fixing member and the holding casing as viewed from the pressurizing direction of the pressurizing mechanism. ### Claim 6 (depends on 1) The vibration wave motor according to claim 1, wherein the vibration wave motor comprises an ultrasonic motor configured to generate vibration with a frequency in an ultrasonic range. ### Claim 7 A lens driving device comprising a vibration wave motor, the vibration wave motor including: a vibrator; a friction member held in friction contact with the vibrator; a pressurizing mechanism configured to pressurize the vibrator against the friction member; a first holding mechanism configured to hold the vibrator; and a second holding mechanism configured to hold the friction member, wherein the vibrator and the friction member are configured to perform relative movement with respect to each other, wherein the first holding mechanism includes a first holding portion and a second holding portion which is longer than the first holding portion in a direction of the relative movement, wherein the friction member is arranged between the first holding portion and the second holding portion, wherein the first holding portion includes a first restriction portion, wherein the second holding portion includes a second restriction portion, and wherein the first restriction portion and the second restriction portion are brought into abutment against the second holding mechanism to restrict movement in directions other than the direction of the relative movement of the vibrator and the first holding mechanism.