Abstract: An ultrasonic horn (50) includes: a vibration source part (53) to which an ultrasonic vibrator (58) is mounted; a tip end part (56) to which a capillary (18) is mounted; and an intermediate part (54) which is interposed between the tip end part (56) and the vibration source part (53) and propagates vibration generated by the ultrasonic vibrator (58) to the tip end part (56). The intermediate part (54) is formed with a single spiral hole (68) which is a hole penetrating in a radial direction of the ultrasonic horn (50) and advances in an axial direction as the spiral hole advances in a circumferential direction.

Abstract: An ultrasonic horn (50) includes: a vibration source part (53) to which an ultrasonic vibrator (58) is mounted; a tip end part (56) to which a capillary (18) is mounted; and an intermediate part (54) which is interposed between the tip end part (56) and the vibration source part (53) and propagates vibration generated by the ultrasonic vibrator (58) to the tip end part (56). The intermediate part (54) is formed with a single spiral hole (68) which is a hole penetrating in a radial direction of the ultrasonic horn (50) and advances in an axial direction as the spiral hole advances in a circumferential direction.

Abstract: A rotor applied to an inner rotor brushless motor includes: a rotor core having a laminate of a plurality of annular thin plate-shaped core pieces, the rotor core being configured to rotate together with a shaft in an integrated manner; a cylindrical resin magnet mounted on an outer peripheral surface of the rotor core via a gap; a groove-shaped adhesive admission portion in a straight line along the entire length of the rotor core in an axial direction thereof, the adhesive admission portion being recessed into the outer peripheral surface of the rotor core; and an adhesive configured to bond and fix the rotor core and the magnet. The adhesive is filled in an entire adhesive allowance having both of the gap and the adhesive admission portion between the outer peripheral surface of the rotor core and an inner peripheral surface of the magnet.

Abstract: An ultrasound horn is provided which vibrates a bonding tool, attached at a tip, in a plurality of directions with a simple structure. There is provided an ultrasound horn having: a longitudinal vibration generator; a horn portion; and a torsional vibration generator. The torsional vibration generator includes a body including a polygonal pillar portion, second layered elements in which a plurality of second piezoelectric elements are layered, and which are attached to side surfaces of the polygonal pillar portion, weights, and a pressure application ring which applies a pressure by pressing the second piezoelectric elements against the polygonal pillar portion via the weights.

Abstract: An ultrasound horn is provided which vibrates a bonding tool, attached at a tip, in a plurality of directions with a simple structure. There is provided an ultrasound horn having: a longitudinal vibration generator; a horn portion; and a torsional vibration generator. The torsional vibration generator includes a body including a polygonal pillar portion, second layered elements in which a plurality of second piezoelectric elements are layered, and which are attached to side surfaces of the polygonal pillar portion, weights, and a pressure application ring which applies a pressure by pressing the second piezoelectric elements against the polygonal pillar portion via the weights.

Abstract: Even in a case of a rotor having a thick laminate, avoidance of nonuniform adhesive application and an increase in quality is achieved with a simple configuration. A rotor applied to an inner rotor brushless motor includes: a rotor core having a laminate of a plurality of annular thin plate-shaped core pieces, the rotor core being configured to rotate together with a shaft in an integrated manner; a cylindrical resin magnet mounted on an outer peripheral surface of the rotor core via a gap; a groove-shaped adhesive admission portion in a straight line along the entire length of the rotor core in an axial direction thereof, the adhesive admission portion being recessed into the outer peripheral surface of the rotor core; and an adhesive configured to bond and fix the rotor core and the magnet. The adhesive is filled in an entire adhesive allowance having both of the gap and the adhesive admission portion between the outer peripheral surface of the rotor core and an inner peripheral surface of the magnet.