| 摘要 |
PURPOSE: A dynamic damper is provided to secure durability by preventing the separation of a mass body with a safety unit and to improve the reliability of the damper by preventing other parts from being broken down by the separation of the mass body. CONSTITUTION: A dynamic damper(100) is composed of a mounting structure body(20) mounted to an object body(10) of which vibration is to be reduced; a mass body(30) combined along the longitudinal direction of the mounting structure body; and a hanging safety unit(40) for preventing the mass body from being separated out of the mounting structure. The hanging safety unit comprises an extension protruded unit(41) extended to both ends of the mass body and a combining unit(43) protruded at both ends of the mounting structure body and composed of a through-hole(45) formed in the center and mounted with the extension protruded unit.
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