A technology for improving a device structure so that an external impact does not occur in a coil in order to solve a problem in that several attachments, such as coil, included in a linear vibration generator are separated or broken due to a small impact test or drop test on the linear vibration generator. The attachments, such as coil, included in the linear vibration generator can be prevented from being disconnected, separated or broken due to the execution of a small impact test and drop test on the linear vibration generator.

A flange part is formed in a shape whose diameter increases toward an outer diameter side of a center core. The flange part closes a space between an end of a magnetic delivery core on a second side in the axial direction and an end of the center core on the second side in the axial direction. An output member includes a contact part, which is brought into contact with an end of the center core on a first side in the axial direction when a plunger moves toward the second side in the axial direction. When the contact part is brought into contact with the end of the center core on the first side in the axial direction, the plunger defines an axial clearance between the plunger and the flange part.

A flange part is formed in a shape whose diameter increases toward an outer diameter side of a center core. The flange part closes a space between an end of a magnetic delivery core on a second side in the axial direction and an end of the center core on the second side in the axial direction. An output member includes a contact part, which is brought into contact with an end of the center core on a first side in the axial direction when a plunger moves toward the second side in the axial direction. When the contact part is brought into contact with the end of the center core on the first side in the axial direction, the plunger defines an axial clearance between the plunger and the flange part.

A rotary power generating apparatus has the first, second piston magnet members, the crankshaft, the first, second guide members and the first, second fixed magnet members and the first, second demagnetizing belts. The first, second piston magnet members and the first, second fixed magnet members are arranged so that the top pole surfaces and fixed pole surfaces having equal polarity, oppose each other. The first, second demagnetizing belts have demagnetizing magnet parts, having magnetic forces weaker than that of the magnetic poles of the top pole surfaces and different from the polarity of the top pole surfaces, and non-magnetic force parts.

A rotary power generating apparatus has the first, second piston magnet members, the crankshaft, the first, second guide members and the first, second fixed magnet members and the first, second demagnetizing belts. The first, second piston magnet members and the first, second fixed magnet members are arranged so that the top pole surfaces and fixed pole surfaces having equal polarity, oppose each other. The first, second demagnetizing belts have demagnetizing magnet parts, having magnetic forces weaker than that of the magnetic poles of the top pole surfaces and different from the polarity of the top pole surfaces, and non-magnetic force parts.

A plural magnet arrangement of a matrix of rows and columns having an altered magnet field alignment of a plurality of the magnets in a matrix comprising rows and columns of magnets in such a manner that there are at times a co-existing combination of changing attractive and repelling magnetic field regions all throughout the coil winding volume, reducing the counter electromotive force (voltage) during electrically connecting a load to the coil winding terminals and extends the time duration of the output voltage waveform and this is accomplished wherein the rotational torque required to rotate the centre magnet through the coil of which it is centred within is reduced.

A plural magnet arrangement of a matrix of rows and columns having an altered magnet field alignment of a plurality of the magnets in a matrix comprising rows and columns of magnets in such a manner that there are at times a co-existing combination of changing attractive and repelling magnetic field regions all throughout the coil winding volume, reducing the counter electromotive force (voltage) during electrically connecting a load to the coil winding terminals and extends the time duration of the output voltage waveform and this is accomplished wherein the rotational torque required to rotate the centre magnet through the coil of which it is centred within is reduced.

Provided is a protruding-based smart tablet including an expression area sensed by a user, the protruding-based smart tablet including a plurality of expression units formed to perform a protruding movement so that the user senses the protruding, a movement control unit configured to control the movement of the expression units, an information control unit configured to control the movement control unit to transmit one or more pieces of information through the expression units, a sensing unit configured to sense an object on the expression area, and an operation control unit configured to control an operation of the expression unit according to a sensing result by the sensing unit.

Presented are a single coil apparatus and a method of forming. An exemplary apparatus includes solenoid assembly. The solenoid assembly includes a core tube extending along a longitudinal axis. The solenoid assembly further includes a first magnet and a second magnet located outside the core tube, the first magnet spaced along the longitudinal axis from the second magnet, and an excitation coil disposed radially outward of the first magnet and the second magnet.

Presented are a single coil apparatus and a method of forming. An exemplary apparatus includes solenoid assembly. The solenoid assembly includes a core tube extending along a longitudinal axis. The solenoid assembly further includes a first magnet and a second magnet located outside the core tube, the first magnet spaced along the longitudinal axis from the second magnet, and an excitation coil disposed radially outward of the first magnet and the second magnet.