Electric Actuator And Electric Parking Brake Device

Abstract: Provided is an electric actuator in which the number of movable parts in a motion conversion mechanism is small, and which has quietness of a small striking sound when an electrical driving part is operated. This electric actuator comprises: an electrical driving source which generates a rotary motion as a driving force; and a motion conversion mechanism which converts the rotary motion into a linear motion. The motion conversion mechanism has: a first member which is prevented from a rotary motion and a linear motion; and a second member which engages with the first member and rotates relative to the first member, thereby generating a linear motion, wherein the second member is rotationally driven by the driving force of the electrical driving source.

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