A vibration type motor includes a limiter configured to limit a distance between a movable guide member and a fixed guide member. The limiter has first, second, and third limiting areas. The first limiting area is disposed between a first roll member and a second roll member in one direction. The second limiting area is disposed on the same side as the second roll member with respect to the first roll member and distant from the second roll member in the one direction. The third limiting area is disposed on an opposite side of the second roll member with respect to the first roll member in the one direction. A length of the first limiting area in another direction orthogonal to the one direction is equal to or longer than that of each of the second limiting area and the third limiting area in the one direction.

An electromechanical motor (1) comprises a stator (2) and a translator (10). The stator has two electromechanical actuators (20) having electromechanically active material (26) and means (35) for providing exciting signals. The translator is arranged between, and in driving contact with, driving portions (22) of the electromechanical actuators. The stator has a spring element (30) arranged for holding the driving portions against the translator. The electromechanical actuators are arranged for providing a vibration, which gives rise to a driving action, directed in a driving direction (X) perpendicular to the direction of the normal force, against the surface of the translator. The electromechanical motor further comprises a guiding means (50) having a circular hole (52). The translator has a cylindrically shaped guidance part (16) arranged at least partly in the circular hole. A tunable high-frequency filter comprising such a motor is also disclosed.

A micromechanical component comprising a bracket and an adjustable portion arranged in an adjustable manner on the bracket. The micromechanical component includes a first bender actuator and a first support structure for the first bender actuator. The first bender actuator is arranged in or on the first support structure and is configured to bend the first support structure at least in the area of the first bender actuator arranged in or on the first support structure, such that the adjustable portion is displaceable relative to the bracket about a first rotational axis. The first support structure is directly connected to the adjustable portion. The micromechanical component additionally includes a first spring configured to suspend the first support structure for the first bender actuator and the adjustable portion from the bracket.

A vibration wave motor includes a vibrator, a contact body to be brought into contact with the vibrator, a shaft fixed to the contact body, and a fixing member configured to fix the contact body and the shaft from the shaft side.

A vibration wave motor includes a vibrator including a piezoelectric element and a vibratory plate, a friction member configured to make a frictional contact with the vibrator, a pressurizer configured to press the vibrator and the friction member against each other, and a guide unit configured to guide a relative movement between the vibrator and the friction member. The guide unit includes a plurality of rollers configured to move relative to the pressurizer, and a guide member that includes a guide portion, the guide portion being configured to extend along a relative movement direction between the vibrator and the friction member and to guide the plurality of rollers. The guide member includes a reinforcer configured to extend along the relative movement direction near a roller closest to a center position of a pressing force by the pressurizer.

A piezoelectric drive device includes a vibrator having a vibrating portion including a piezoelectric element, and a convex portion placed in the vibrating portion, an urging member including a base, a holding portion holding the vibrator, and a spring portion coupled to the base at one end and coupled to the holding portion at another end and urging the convex portion toward a driven unit, wherein d1>d2 in a natural state in which the vibrator is not urged by the urging member, where a separation distance between the one end and the convex portion along directions of the longitudinal direction is d1 and a separation distance between the other end and the convex portion is d2, and |d1−d2| in an urging state in which the vibrator is urged toward the driven unit by the urging member is smaller than |d1−d2| in the natural state.

An electromagnetic-piezoelectric composite vibration control device based on a synchronized switch damping technology is provided. An upper guiding component is installed inside the upper rigid frame, a lower guiding component is installed inside a lower rigid component, a guide rod is nested inside the upper guiding component and the lower guiding component, an upper idler wheel mechanism and a lower idler wheel mechanism are fixedly sleeved on the guide rod and are positioned between the upper guiding component and the lower guiding component respectively, an electromagnetic mechanism is fixedly sleeved outside the guide rod, one end of each piezoelectric cantilever beam is fixed between the upper rigid frame and the lower rigid frame, the other end is arranged between the upper idler wheel mechanism and the lower idler wheel mechanism, and the piezoelectric cantilever beams and the electromagnetic mechanism are connected with a circuit system respectively.

Disclosed is a self-powered vibration damper based on piezoelectricity and a control method. The damper comprises a loading platform, an energy collecting mechanism, a curved leaf spring, a vibration control mechanism and a substrate all connected in sequence, the circuit system comprises a rectifier circuit, a DC-DC voltage conversion circuit, an energy storage circuit, a control circuit and a charging battery, a first piezoelectric stack is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the input end of the DC-DC voltage conversion circuit, the output end of the DC-DC voltage conversion circuit is connected with the input ends of the energy storage circuit and the charging battery, the output end of the energy storage circuit is connected with the input end of the control circuit, the output end of the control circuit is connected with the second piezoelectric stack.

A piezoelectric driving device includes a piezoelectric vibrating body and a driving circuit. The piezoelectric vibrating body includes a contact which extends in a first direction and comes into contact with a driven member, a first piezoelectric element which generates bending vibration in a direction intersecting with the first direction in accordance with a first driving voltage, and a second piezoelectric element which generates longitudinal vibration in the first direction in accordance with a second driving voltage. The piezoelectric vibrating body is configured such that a resonance frequency of the longitudinal vibration is higher than a resonance frequency of the bending vibration. The driving circuit sets a driving frequency of each of the first driving voltage and the second driving voltage to be equal to or higher than the resonance frequency of the longitudinal vibration.

A piezoelectric drive device includes two vibrators having vibrating portions with piezoelectric elements and transmitting portions placed in the vibrating portions and transmitting drive forces to a driven member (e.g. a slider), and a fixing portion having through holes (first through hole, second through hole)into which pins or screws are inserted. The two vibrators are placed adjoiningly along a drive direction of the slider, and the fixing portion is placed between the two vibrators and fixing the two vibrators.