Most vibration generators that use rotating eccentric masses of prior arts have disadvantages in controlling vibration magnitude such as stopping equipment, adjusting intermittently, or limitation on control range. In the present invention to continuously change the direction of a generated vibration force or its magnitude, the principle of synthesizing simple harmonic motions by phase shifting is used and two methods, called a mechanical phase shifting and a motor speed controlled phase shifting, are provided. A mechanical phase shifting device includes an angle adjusting plate to change the phases of two eccentric mass rotators and two pairs of gears and links for a reverse rotation of eccentric masses. A motor speed controlled phase shifting is enabled by acceleration and deceleration of a motor. A moment generator comprises two sets of eccentric mass vibrators connected by extending shafts between them and can be used for industry shakers, stabilizer's for floating bodies, and so on.

There is provided a vibration generation device superior in responsivity compared to the related art. The vibration generation device includes a stator, a rotor provided to the stator so as to be able to rotate around the central axis, and having a weight having a gravity center at a position shifted from the central axis, and an air resistance reduction part provided to the weight, and reducing the air resistance to the weight when the rotor rotates. The weight is formed to have a semicircular shape viewed from the axial direction, and the air resistance reduction part has an arcuate part adapted to connect an end edge on the upstream side in the rotational direction of the rotor in the outer circumferential surface of the weight and an end edge on the downstream side in the rotational direction to each other so as to form a circular arc shape.

There is provided a vibration generation device superior in responsivity compared to the related art. The vibration generation device includes a stator, a rotor provided to the stator so as to be able to rotate around the central axis, and having a weight having a gravity center at a position shifted from the central axis, and an air resistance reduction part provided to the weight, and reducing the air resistance to the weight when the rotor rotates. The weight is formed to have a semicircular shape viewed from the axial direction, and the air resistance reduction part has an arcuate part adapted to connect an end edge on the upstream side in the rotational direction of the rotor in the outer circumferential surface of the weight and an end edge on the downstream side in the rotational direction to each other so as to form a circular arc shape.

The torque motor in this patent depends on decreasing the gap between a surface on a fixed part and a corresponding inclined facing surface on a rotating part, where the gap width is proportional to its distance from the angle vertex, in magnifying the electromagnetic force and its resulting torque. Therefore, the surface on the fixed part starts directly ator close toa point in align with the rotating part center of rotation, and hence the gap width is minimum at the start point and increases away from this point due to the inclination angle. The motor may have various features such as utilizing many pairs of facing surfaces, many electromagnetic circuits; arrange the surfaces in pairs for balanced forces, works in one or two directions, the two directions electromagnetic circuits installed in one or two levels. Precautions and ways to avoid magnetic field interference and leakage should be considered.

The torque motor in this patent depends on decreasing the gap between a surface on a fixed part and a corresponding inclined facing surface on a rotating part, where the gap width is proportional to its distance from the angle vertex, in magnifying the electromagnetic force and its resulting torque. Therefore, the surface on the fixed part starts directly ator close toa point in align with the rotating part center of rotation, and hence the gap width is minimum at the start point and increases away from this point due to the inclination angle. The motor may have various features such as utilizing many pairs of facing surfaces, many electromagnetic circuits; arrange the surfaces in pairs for balanced forces, works in one or two directions, the two directions electromagnetic circuits installed in one or two levels. Precautions and ways to avoid magnetic field interference and leakage should be considered.

A vibration motor includes a stationary portion, a vibrating body, an elastic member, and a damper member. The elastic member includes a first extending portion, a second extending portion, a first connection portion, a second connection portion, a third extending portion, a fourth extending portion, a third connection portion, a fourth connection portion, and a fifth connection portion. The damper member includes a first longitudinal portion and a second longitudinal portion. An inner section including the first extending portion, the third extending portion, and the fifth connection portion directly opposes an upper surface of a weight in plan view in an up-down direction.

An oscillating power generator may include an oscillating apparatus, an assisting oscillation apparatus, and a power generation apparatus. The oscillating apparatus has an oscillating portion, and at least a clump weight is installed inside the oscillating portion to change the position of the gravity center of the oscillating portion, and to keep the horizontal position of the gravity center of the oscillating portion below the rotational center of the oscillating portion, so that the oscillating portion is adapted to oscillate from side to side and eventually return to a stable state where the rotational center, the gravity center, and the pivot point are aligned in a straight line. Each of two lateral sides of the oscillating portion comprises an oscillating magnetic portion. The assisting oscillation apparatus has two fixed magnetic portions, and the oscillating magnetic portion and fixed magnetic portion are adapted to repel each other.

An oscillating power generator may include an oscillating apparatus, an assisting oscillation apparatus, and a power generation apparatus. The oscillating apparatus has an oscillating portion, and at least a clump weight is installed inside the oscillating portion to change the position of the gravity center of the oscillating portion, and to keep the horizontal position of the gravity center of the oscillating portion below the rotational center of the oscillating portion, so that the oscillating portion is adapted to oscillate from side to side and eventually return to a stable state where the rotational center, the gravity center, and the pivot point are aligned in a straight line. Each of two lateral sides of the oscillating portion comprises an oscillating magnetic portion. The assisting oscillation apparatus has two fixed magnetic portions, and the oscillating magnetic portion and fixed magnetic portion are adapted to repel each other.

A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.

A holder is used while attached to a chassis of a vibration generator that moves a vibrator to generate a vibration. The holder includes a vibrator retention unit retaining the vibrator, a fixed unit fixed to the chassis, and an arm. The arm connects the fixed unit and the vibrator retention unit, and the arm supports the vibrator retention unit while the vibrator retention unit can be displaced with respect to the fixed unit. The fixed unit, the arm, and the vibrator retention unit are integrally formed using resin.