VIBRATION TYPE MOTOR AND LENS DRIVING DEVICE

• Main Author: OSAWA KAZUHARU
• Format: Patent
• Language: English; Japanese
• Published: 25.07.2019
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS

To provide a vibration type motor having good drive efficiency.SOLUTION: A vibration type motor 10 has a transducer 11 including a protrusion 13a and vibrating by application of a driver voltage, a friction member 14 having a slide face 14a formed with a curved surface coming into contact with the protrusion 13a, and compression means P for compressing the transducer 11 against the friction member 14 with a compression force F1, generating a driving force F2 in the tangential direction of the slide face 14a by vibration, and driving the transducer 11 and the friction member 14 relatively. The protrusion 13a is placed in the neighborhood of the node N1 of vibration, generates elliptic motion EM by vibration, and the elliptic motion EM is inclining by a prescribed angle θ for the curved surface of the slide face 14a.SELECTED DRAWING: Figure 4 【課題】駆動効率が良い振動型モータを提供する。【解決手段】振動型モータ１０は、突起部１３ａを備え、駆動電圧の印加により振動する振動子１１と、突起部１３ａが接触する、曲面で形成された摺動面１４ａを有する摩擦部材１４と、振動子１１を摩擦部材１４に加圧力Ｆ１で加圧する加圧手段Ｐと、を有し、振動により摺動面１４ａの接線方向に駆動力Ｆ２を発生させ、振動子１１と摩擦部材１４とを相対的に駆動させ、突起部１３ａは、振動の節Ｎ１の近傍に配置され、突起部１３ａは、振動により楕円運動ＥＭを発生し、楕円運動ＥＭが摺動面１４ａの曲面に対して所定の角度θに傾いて運動する。【選択図】図４