A device (10′) for welding components by ultrasound. The device (10′) comprises a sonotrode (11′) having a sonotrode head (12′) which can be excited by a vibration generator to produce torsion vibrations with respect to a torsion axis (T). At least one welding surface (14′) is arranged on the peripheral side on the sonotrode head (12′) with respect to the torsion axis (T). The device (10′) also comprises a support device (15′) which supports the sonotrode head (11′) in a support area (16′), which contains a vibration node of the sonotrode head (12′). The support area (16′) and the welding surface (14′) at least partially extend along a common plane (E) which extends perpendicular to the torsion axis (T). A device (10′) for welding components by ultrasound by using a temperature control device are also disclosed.

The present invention concerns a processing element for processing a material, like for example a sonotrode or an anvil, comprising a carrier surface which is substantially in the form of a cylinder or in the form of a segment of a cylinder and which is intended to come into contact with the material during processing, wherein the processing element is intended to be rotated about its longitudinal axis during processing so that the carrier surface rolls on the material to be processed, wherein arranged on the carrier surface is at least one structure element which projects beyond the carrier surface in the radial direction, wherein the structure element has a top side which is provided to come into contact with the material to be processed. To provide a processing element which reduces the abrupt deflection of the sonotrode when the material comes into engagement with and/or comes out of engagement with the carrier surface it is proposed according to the invention that the top side is at least portion-wise convexly curved in the peripheral direction with a radius of curvature which is less than the greatest spacing of the top side from the cylinder axis or comprises at least two surface portions which include an angle <180°.

The present invention concerns a processing element for processing a material, like for example a sonotrode or an anvil, comprising a carrier surface which is substantially in the form of a cylinder or in the form of a segment of a cylinder and which is intended to come into contact with the material during processing, wherein the processing element is intended to be rotated about its longitudinal axis during processing so that the carrier surface rolls on the material to be processed, wherein arranged on the carrier surface is at least one structure element which projects beyond the carrier surface in the radial direction, wherein the structure element has a top side which is provided to come into contact with the material to be processed. To provide a processing element which reduces the abrupt deflection of the sonotrode when the material comes into engagement with and/or comes out of engagement with the carrier surface it is proposed according to the invention that the top side is at least portion-wise convexly curved in the peripheral direction with a radius of curvature which is less than the greatest spacing of the top side from the cylinder axis or comprises at least two surface portions which include an angle <180°.

A haptic actuator includes mechanical links defining a first J-trajectory and mechanical links defining a second J-trajectory as well as a motor coupled to the mechanical links so as to synchronously accelerate a first mass over the first J-trajectory and a second mass over the second J-trajectory. During a first time interval, reactive forces of the first mass accelerating substantially balance reactive forces of the second mass accelerating and during a second time interval reactive forces of the first mass accelerating do not substantially balance reactive forces of the second mass accelerating. This un-balanced condition results in a tap signal being produced.

A haptic actuator includes mechanical links defining a first J-trajectory and mechanical links defining a second J-trajectory as well as a motor coupled to the mechanical links so as to synchronously accelerate a first mass over the first J-trajectory and a second mass over the second J-trajectory. During a first time interval, reactive forces of the first mass accelerating substantially balance reactive forces of the second mass accelerating and during a second time interval reactive forces of the first mass accelerating do not substantially balance reactive forces of the second mass accelerating. This un-balanced condition results in a tap signal being produced.

A circuit for 3D ultrasound imaging systems includes multiple sensor units, multiple unit circuits and multiple row sharing circuits. The unit circuits are connected with the sensor units respectively. Each row of unit circuits share a row sharing circuit. Each unit circuit includes a first electrically controlled switch, a second electrically controlled switch and a control circuit. Each row sharing circuit includes a signal transmission bus, a signal receiving bus and a row main control circuit. The signal transmission bus and the signal receiving bus of each row sharing circuit extend through a corresponding row of unit circuits. The row main control circuit of each row is configured to transmit main control signals, transmission control signals and receiving control signals to a corresponding row of unit circuits so as to select the corresponding sensor units to transmit or receive ultrasound signals.

A circuit for 3D ultrasound imaging systems includes multiple sensor units, multiple unit circuits and multiple row sharing circuits. The unit circuits are connected with the sensor units respectively. Each row of unit circuits share a row sharing circuit. Each unit circuit includes a first electrically controlled switch, a second electrically controlled switch and a control circuit. Each row sharing circuit includes a signal transmission bus, a signal receiving bus and a row main control circuit. The signal transmission bus and the signal receiving bus of each row sharing circuit extend through a corresponding row of unit circuits. The row main control circuit of each row is configured to transmit main control signals, transmission control signals and receiving control signals to a corresponding row of unit circuits so as to select the corresponding sensor units to transmit or receive ultrasound signals.

An ultrasonic transmitting unit includes a first vibrating section and a second vibrating section vibrating at the same predetermined frequency with respect to each other. The ultrasonic transmitting unit includes a relay portion transmitting an ultrasonic vibration from the first vibrating section to the second vibrating section and positioned at a position corresponding to one of an antinode position of the vibration in the first vibrating section and a position different from an antinode position and a node position of the vibration in the second vibrating section, and a non-contact vibrating portion extending in the second vibrating section from the relay portion toward a first vibrating section side with being not in contact with the first vibrating section.

An electroacoustic transducer is provided that combines the properties and advantages of the known concepts of the thickness mode transducer and of the bending transducer with each other. For this purpose, an electroacoustic transducer is provided, which includes a housing and an oscillating structure. The oscillating structure is formed by at least one piezoelectric element, a diaphragm, and an acoustic transmitter. It is provided that the diaphragm is designed as a bending transducer, and the acoustic transmitter is designed as a thickness mode transducer.

An electroacoustic transducer is provided that combines the properties and advantages of the known concepts of the thickness mode transducer and of the bending transducer with each other. For this purpose, an electroacoustic transducer is provided, which includes a housing and an oscillating structure. The oscillating structure is formed by at least one piezoelectric element, a diaphragm, and an acoustic transmitter. It is provided that the diaphragm is designed as a bending transducer, and the acoustic transmitter is designed as a thickness mode transducer.