The technology introduces a new type of attachment to the shaft of a vibration motor designed to have the dual properties of eccentricity and an aerodynamic shape. This aerodynamic shape is intended to enhance the performance of the ERM-based device, improve its capabilities, or both. In this disclosure the term performance means current draw, noise, or controllability of the aerodynamic vibration attachment. The aerodynamic vibration attachment may have additional properties such as an embedded or otherwise incorporated shape or target that facilitates the estimation or measurement of the aerodynamic vibration attachment's angular position, angular velocity, or both, by a sensor or sensors. Alternatively, the aerodynamic vibration attachment may have additional properties such as an embedded sensor or sensors, and facilitates the estimation or measurement of the aerodynamic vibration attachment's angular position, angular velocity, or both, compared to signals obtained from external, non-rotating sensors, targets, markers or references.

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.

The linear moto includes a bracket, two elastic support modules, a driving assembly, and a motion assembly suspended above the driving assembly. The driving assembly is mounted on the bracket and configured to drive the motion assembly to reciprocate in a predetermined direction. The motion assembly has two ends in the predetermined direction, two elastic support modules are configured to connect the two ends to the bracket, respectively. Each of the two elastic support modules includes a plate spring sheet, an adapter assembly, and a first connection member, the plate spring sheet has a first connection end and a second connection end, the first connection end is fixedly connected to the motion assembly, the first connection member extends through and connects to the second connection end and the adapter assembly, the plate spring sheet is fixedly connected to the bracket via the adapter assembly.

A vibrator-mounted holder is attached to a casing of a vibration generator which moves a vibrator to generate a vibration when used. The vibrator-mounted holder includes a vibrator, a vibrator retention unit retaining the vibrator, a fixing unit fixed to a casing, and an arm. The vibrator includes a magnet having a plate shape parallel to a horizontal surface and a yoke arranged on the magnet. The arm connects the fixing unit to the vibrator retention unit, and supports the vibrator retention unit in a manner that the vibrator retention unit is displaceable with respect to the fixing unit. The yoke has a projecting portion which is projected downward and fixed to the vibrator retention unit. The arm is connected to a portion, at which the projecting portion is arranged, within the vibrator retention units.

A vibrator-mounted holder is attached to a casing of a vibration generator which moves a vibrator to generate a vibration when used. The vibrator-mounted holder includes a vibrator, a vibrator retention unit retaining the vibrator, a fixing unit fixed to a casing, and an arm. The vibrator includes a magnet having a plate shape parallel to a horizontal surface and a yoke arranged on the magnet. The arm connects the fixing unit to the vibrator retention unit, and supports the vibrator retention unit in a manner that the vibrator retention unit is displaceable with respect to the fixing unit. The yoke has a projecting portion which is projected downward and fixed to the vibrator retention unit. The arm is connected to a portion, at which the projecting portion is arranged, within the vibrator retention units.

A linear compressor includes a shell and a frame disposed in the shell, where the frame includes a body portion and a flange portion extending in a radial direction from a front of the body portion. The linear compressor further includes a cylinder coupled to an inside of the body portion, a piston disposed in the cylinder and configured to reciprocate axially, a drive unit coupled to a rear surface of the flange portion, a stator cover coupled to a rear surface of the drive unit, and a heat dissipation member coupled to the drive unit and disposed between the rear surface of the flange portion and a front surface of the stator cover.

This actuator includes a movable body provided with a magnet and a yoke, and a support body provided with a case and a coil, and vibrates the movable body. The yoke includes a first opposing portion and a second opposing portion that oppose the coil from both sides in a Z direction. A pair of second joining plate portions that extend from both ends of the second opposing portion are fitted inside a pair of first joining plate portions that extend from both ends of the first opposing portion. In the yoke, both sides of a pair of first connecting bodies that connect the first opposing portion and a first plate that covers the coil from a Z1 direction, and both sides of a pair of second connecting bodies that connect the second opposing portion and a second plate that covers the coil from a Z2 direction, are notched.

This actuator includes a movable body provided with a magnet and a yoke, and a support body provided with a case and a coil, and vibrates the movable body. The yoke includes a first opposing portion and a second opposing portion that oppose the coil from both sides in a Z direction. A pair of second joining plate portions that extend from both ends of the second opposing portion are fitted inside a pair of first joining plate portions that extend from both ends of the first opposing portion. In the yoke, both sides of a pair of first connecting bodies that connect the first opposing portion and a first plate that covers the coil from a Z1 direction, and both sides of a pair of second connecting bodies that connect the second opposing portion and a second plate that covers the coil from a Z2 direction, are notched.

A frame-type bilateral reverse permanent magnet direct current linear motor is provided, including a support frame, an iron yoke assembly with a first iron yoke, a second iron yoke and a middle iron yoke, a permanent magnet group, a coil winding and a pole piece assembly. Two groups of intermediate transition permanent magnet assemblies are disposed between the first iron yoke and the middle iron yoke and between the second iron yoke and the middle iron yoke. The intermediate transition permanent magnet assemblies includes transition permanent magnets and corresponding transition connection iron yokes; and magnetic pole orientations of the transition permanent magnets of the two groups of intermediate transition permanent magnet assemblies are reverse. The linear motor realizes efficient direct-current linear control, and has a high speed, a precise controllability, a high thrust density and small thrust fluctuation, and easiness in assembling.