Radial magnet actuator with moving mass having a magnet moving vertically and a coil

A radial magnet actuator, comprising:

• a housing having an inner space;
• a moving body including a mass body provided to be relatively movable in the inner space, and a hollow radial magnet provided in the mass body;
• an elastic member configured to connect the housing and the moving body;
• a coil part provided in the inner space and at least a part of which is inserted into the hollow of the radial magnet;
• and
• a controller configured to apply an alternating current to the coil part,
• wherein the radial magnet is magnetized in a radial direction, and an inner side of the radial magnet has a polarity of N pole or S pole, and an outer side of the radial magnet has a polarity opposite to the inner side of the radial magnet,
• wherein the coil part receives an alternating current from the controller to generate a magnetic field whose polarity alternately changes, and
• wherein a magnitude of a vibration force generated between a first driving frequency and a second driving frequency which is greater than the first driving force is measured to be 0.5G or more, and a bandwidth, which is a difference between the first driving frequency and the second driving frequency, is greater than 200 Hz,
• wherein the second driving frequency is greater than 400 Hz.