Canon Kabushiki Kaisha

Shinichi Koreeda

Takayuki Tsukimoto

Akio Atsuta

Nobuyuki Kojima

Hitoshi Mukohjima

Takashi Maeno

Hajime Kanazawa

Mitsuo Nishimura

Ichiro Chiba

A vibration driven motor including a vibration member for generating a vibration therein as a driving force, and a contact member in press contact with the vibration member, wherein a vibration generated in the vibration member causes relative movement between the vibration member and the contact member. The vibration member includes an elastic contact portion, and the contact member includes an elastic contact portion in contact with the contact portion of the vibration member.

Vibration driven motor including a vibration member having an elastic

In a vibration driven motor or actuator, which has members for generating a first bending vibration and a second bending vibration in a direction different from the first bending vibration therein, and in which a combined vibration of the first bending vibration and the second bending vibration is caused, rigidities in two directions of the vibration member are set to be equal to or substantially equal to each other.

Vibration driven motor

A vibration driven motor or actuator includes a vibrating member for generating a vibration therein in response to an electrical signal applied thereto, and a contact member frictionally engaged with the vibrating member to be driven by the vibration. The contact member has a structure for causing sin and cos modes of the vibration generated in the contact member to have different natural frequencies when the contact member is driven by the vibration.

Vibration driven actuator

In a vibration wave driven motor wherein an AC electric field is applied to an electro-mechanical energy conversion element secured to an elastic member to thereby excite a plurality of standing waves differing in phase from each other in the elastic member and a travelling wave is formed in the elastic member by the combination of the standing waves, whereby a member which is in pressure contact with the elastic member and the elastic member are moved relative to each other by a frictional force, provision is made of means for making the contact pressure on the surface of contact between the elastic member and the member which is in pressure contact with the elastic member non-uniform, and means for making the dynamic rigidity of a vibration member non-uniform in an unnecessary vibration mode created by the means for making the contact pressure non-uniform, whereby the occurrence of noise is prevented by simple and inexpensive means.

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Kawasaki, Japan

Shinichi Koreeda