Vibration-type driving apparatus and apparatus having the same

An apparatus comprising:

• a vibration-type driving apparatus;
• and
• a driven member driven by the vibration-type driving apparatus,
• wherein the vibration-type driving apparatus includes:
• a vibrator unit including:
• a vibrator in which vibration is excited by an electro-mechanical energy convertor;
• and
• a holder configured to hold the vibrator;
• a contact body in contact with the vibrator, and
• a pressurizing unit configured to pressurize the vibrator so as to make the vibrator come into contact with the contact body,
• wherein the pressurizing unit includes:
• a first pressurizing plate;
• a vibration isolating member provided between the first pressurizing plate and the vibrator;
• a second pressurizing plate facing the first pressurizing plate on an opposite side from the vibration isolating member, and having a protrusion coming into contact with the first pressurizing plate, and
• a pressurizing member configured to provide the second pressurizing plate with a pressurizing force,
• wherein the vibrator and the contact body move relative to each other when vibration at a frequency higher than an audible range is excited in the vibrator, and
• wherein the contact body has a shape that satisfies a following condition:
• fD±fSMN≠fSL
• where fD represents a driving frequency of the vibrator, fSMN (N is an integer) represents a frequency of a vibration mode in the audible range among a plurality of vibration modes of the vibrator unit, and fSL represents a frequency of out-of-plane vibration occurring in the contact body.

A vibration-type driving apparatus comprising:

• a vibrator unit including:
• a vibrator in which vibration is excited by an electro-mechanical energy convertor;
• and
• a holder configured to hold the vibrator;
• and
• a contact body in contact with the vibrator,
• wherein the vibrator and the contact body move relative to each other when vibration at a frequency higher than an audible range is excited in the vibrator, and
• wherein the contact body has a shape that satisfies a following condition:
• fD±fSMN≠fSL
• where fD represents a driving frequency of the vibrator, fSMN (N is an integer) represents a frequency of a vibration mode in the audible range among a plurality of vibration modes of the vibrator unit, and fSL represents a frequency of out-of-plane vibration occurring in the contact body,
• wherein the contact body has a shape with which rigidity in an out-of-plane direction at an anti-node portion of out-of-plane vibration at fSL closest to fD±fSMN is different from rigidity in the out-of-plane direction at a portion other than the anti-node portion.

A vibration-type driving apparatus comprising:

• a vibrator unit including:
• a vibrator in which vibration is excited by an electro-mechanical energy convertor;
• and
• a holder configured to hold the vibrator;
• and
• a contact body in contact with the vibrator,
• wherein the vibrator and the contact body move relative to each other when vibration at a frequency higher than an audible range is excited in the vibrator,
• wherein the contact body has a shape with which rigidity in an out-of-plane direction in a first range is different from rigidity in the out-of-plane direction in a second range, the first range overlapping a range in which the vibrator moves when viewed from a direction in which the vibrator comes into contact with the contact body, a second range not overlapping the range in which the vibrator moves, and
• wherein the contact body has a shape that satisfies a following condition:
• fD±fSMN≠fSL
• where fD represents a driving frequency of the vibrator, fSMN (N is an integer) represents a frequency of a vibration mode in the audible range among a plurality of vibration modes of the vibrator unit, and fSL represents a frequency of out-of-plane vibration occurring in the contact body.

A vibration-type driving apparatus comprising:

• a vibrator unit including:
• a vibrator in which vibration is excited by an electro-mechanical energy convertor;
• and
• a holder configured to hold the vibrator;
• and
• a contact body in contact with the vibrator,
• wherein the vibrator and the contact body move relative to each other when vibration at a frequency higher than an audible range is excited in the vibrator, and
• wherein the contact body has a shape that satisfies a following condition:
• fD±fSMN≠fSL
• where fD represents a driving frequency of the vibrator, fSMN (N is an integer) represents a frequency of a vibration mode in the audible range among a plurality of vibration modes of the vibrator unit, and fSL represents a frequency of out-of-plane vibration occurring in the contact body,
• wherein among frequencies of vibration modes in the audible range of the vibrator unit, the fSMN is (a) a lowest-order vibration mode of vibration in a direction in which the vibrator comes into contact with the contact body, and (b) a lowest-order vibration mode of vibration mainly including rotation around an axis in a direction orthogonal to both directions in one of which the vibrator and the contact body move relative to each other and in the other of which the vibrator comes into contact with the contact body.