An electromagnetic actuator including: an outer tubular member and an inner axial member connected by an elastic member; a coil member attached to the outer tubular member generating electromagnetic force through energization thereto; a magnet member attached to the inner axial member and subjected to the electromagnetic force to exert axial driving force between the inner axial member and the outer tubular member; a first support section provided at the outer tubular member to axially clamp and securely support the coil member; a synthetic resin annular member housed within the outer tubular member including a power feed terminal to the coil member; and a second support section provided at the outer tubular member to axially clamp and securely support the annular member in such a parallel structure that clamping force by the first support section is not exerted on the second support section.

An electromagnetic actuator including: an outer tubular member and an inner axial member connected by an elastic member; a coil member attached to the outer tubular member generating electromagnetic force through energization thereto; a magnet member attached to the inner axial member and subjected to the electromagnetic force to exert axial driving force between the inner axial member and the outer tubular member; a first support section provided at the outer tubular member to axially clamp and securely support the coil member; a synthetic resin annular member housed within the outer tubular member including a power feed terminal to the coil member; and a second support section provided at the outer tubular member to axially clamp and securely support the annular member in such a parallel structure that clamping force by the first support section is not exerted on the second support section.

The present invention relates to wobbly balls and exercise coil springs. A wobbly ball may include a non-spherical rigid, hollow ball body formed of two halves, each half comprising an upper ladle or a lower ladle which are welded together along a central seam therebetween, and defining a hollow cavity therein. A spherical inner ball is captured within the hollow cavity of the hollow ball body of the wobbly ball, so that upon movement of the wobbly ball, the inner ball rolls within the cavity, producing a wobbly, eccentric motion. The exercise coil spring may be formed of a single coiled wire, the coiled spring including a central portion where the coiled wire is coiled to a first diameter that is constant. Opposed flared ends are provided ends of the central portion where the coiled wire is progressively coiled from the first diameter to a second diameter, which is greater.

The present invention relates to wobbly balls and exercise coil springs. A wobbly ball may include a non-spherical rigid, hollow ball body formed of two halves, each half comprising an upper ladle or a lower ladle which are welded together along a central seam therebetween, and defining a hollow cavity therein. A spherical inner ball is captured within the hollow cavity of the hollow ball body of the wobbly ball, so that upon movement of the wobbly ball, the inner ball rolls within the cavity, producing a wobbly, eccentric motion. The exercise coil spring may be formed of a single coiled wire, the coiled spring including a central portion where the coiled wire is coiled to a first diameter that is constant. Opposed flared ends are provided ends of the central portion where the coiled wire is progressively coiled from the first diameter to a second diameter, which is greater.

Provided is a broadband and large displacement angular vibrator, comprising an outer housing, a vibration table, a main spindle, a moving coil assembly, a magnetic circuit assembly, a holding brake assembly, a motor and closed loop control assembly thereof, an electric viscoelastic feedback control assembly, an air bearing, and an angular displacement sensor; the moving coil comprises a moving coil substrate and a coil; the moving coil substrate is fixed to the main spindle; the magnetic circuit assembly comprises a magnetic ring, a central magnetic pole, and magnets; the magnetic ring, central magnetic pole, magnets, and air gap form a closed magnetic circuit; the central magnetic pole is located inside the magnetic ring, the magnets are located between the magnetic ring and the central magnetic pole, and the magnets are attached to the central magnetic pole; the outer housing has the holding brake assembly; the holding brake assembly comprises a brake lining, an oil distribution sleeve, and an oil reservoir having a piston; the brake lining and the oil distribution sleeve enclose a hydraulic oil chamber; when the hydraulic oil is pressed into the hydraulic oil chamber from the oil reservoir, the magnetic circuit assembly brakes; when the hydraulic oil flows back to the oil reservoir, the magnetic circuit assembly rotates with the motor rotor. The present angular shaker has the advantage of being able to switch between intermediate-frequency and low-frequency, and has small output waveform distortion.

Provided is a broadband and large displacement angular vibrator, comprising an outer housing, a vibration table, a main spindle, a moving coil assembly, a magnetic circuit assembly, a holding brake assembly, a motor and closed loop control assembly thereof, an electric viscoelastic feedback control assembly, an air bearing, and an angular displacement sensor; the moving coil comprises a moving coil substrate and a coil; the moving coil substrate is fixed to the main spindle; the magnetic circuit assembly comprises a magnetic ring, a central magnetic pole, and magnets; the magnetic ring, central magnetic pole, magnets, and air gap form a closed magnetic circuit; the central magnetic pole is located inside the magnetic ring, the magnets are located between the magnetic ring and the central magnetic pole, and the magnets are attached to the central magnetic pole; the outer housing has the holding brake assembly; the holding brake assembly comprises a brake lining, an oil distribution sleeve, and an oil reservoir having a piston; the brake lining and the oil distribution sleeve enclose a hydraulic oil chamber; when the hydraulic oil is pressed into the hydraulic oil chamber from the oil reservoir, the magnetic circuit assembly brakes; when the hydraulic oil flows back to the oil reservoir, the magnetic circuit assembly rotates with the motor rotor. The present angular shaker has the advantage of being able to switch between intermediate-frequency and low-frequency, and has small output waveform distortion.

A linear vibration motor includes a bracket, a coil provided to the bracket, a case for covering the bracket, a mass positioned in the case, at least two or more springs, each of which one end is connected to the mass and the other end is connected to one surface of the case, a magnet coupled to the mass to be integrated therewith and facing the coil, a plate coupled to the mass to be integrated therewith and positioned on the magnet, and a friction reducing part provided on at least one surface of the mass and reducing friction between the mass and the bracket. The mass vibrates in the horizontal direction such that the thickness of the linear vibration motor is not increased but can be manufactured thin. Therefore, it is advantageous in terms of space when the linear vibration motor is arranged in a mobile phone.

A linear vibration motor includes a bracket, a coil provided to the bracket, a case for covering the bracket, a mass positioned in the case, at least two or more springs, each of which one end is connected to the mass and the other end is connected to one surface of the case, a magnet coupled to the mass to be integrated therewith and facing the coil, a plate coupled to the mass to be integrated therewith and positioned on the magnet, and a friction reducing part provided on at least one surface of the mass and reducing friction between the mass and the bracket. The mass vibrates in the horizontal direction such that the thickness of the linear vibration motor is not increased but can be manufactured thin. Therefore, it is advantageous in terms of space when the linear vibration motor is arranged in a mobile phone.

A rotary electric machine including a rotor having salient poles, each salient pole comprising a pole body surrounded by at least one coil, and at least one pair of wedges comprising a first wedge positioned against the coil of a first salient pole and a second wedge positioned against the coil of a second salient pole consecutive with the first. The first and second wedges are able to move in the inter-pole space with respect to one another along the longitudinal axis of the rotor, and each having at least one contact surface, the contact surface or surfaces of the first wedge being configured to come into contact with the contact surface or surfaces of the second wedge as one wedge is moved longitudinally with respect to the other in such a way that the movement of one wedge with respect to the other induces a pressing of these wedges against the coils so as to hold the coils of the first and second salient poles respectively against the pole bodies of the first and second salient poles.

A linear actuator for pumping comprising a stator having an inner opening, a shaft having a plurality of permanent magnets spaced linearly in the axial direction, the shaft disposed in the stator opening and configured to reciprocate linearly in the axial direction relative to the stator, the stator comprising a first stator assembly having a plurality of pole sections spaced linearly in the axial direction and a plurality of coils disposed therebetween, a second stator assembly having a plurality of pole sections spaced linearly in the axial direction and a plurality of coils disposed therebetween, a bearing assembly positioned axially between the first stator assembly and the second stator assembly, and the bearing assembly having a width that is a function of the spacing of the plurality of pole sections of the first stator assembly and the second assembly and the spacing of the plurality of permanent magnets of the shaft.