Abstract: A weight with optimum weight and high strength can be easily manufactured and the vibration actuator with excellent vibration characteristic is provided. The vibration actuator is formed by a casing 2 with cylindrical shape, a coil 21 provided in the casing 2, and a mover 4 that vibrates along an vibration-axis direction of the casing 2. The mover 4 includes a mover body and a weight fixed to the mover body. A protrusion 311 protruding toward an opening of the casing 2 is provided at a central portion of the mover body, and a recess 321 which is recessed toward the opening of the casing 2 is provided at the central portion of the weight 32. The mover body and the weight 32 is fixed in a state in which the protrusion 311 is inserted into the recess 321.

Abstract: With an object to provide easy-to-assemble headphones with a stable waterproof performance, a headphone is formed of a mechanical attaching mechanism mechanically putting a front housing 5 and a rear housing 3 together, a waterproof mesh portion 11 having a first waterproof mesh 9 of a shape larger than a shape of a sound releasing hole 5c of the front housing 5 and disposed on an inner surface side of the front housing 5 so as to cover the sound releasing hole 5c, a first elastic ring 13 allowed to abut on an inner surface of the front housing 5 and a peripheral portion of the first waterproof mesh 9 of the waterproof mesh portion 11, and an inner housing 51 pressed by the rear housing 3 when the front housing 5 and the rear housing 3 are put together and in turn pressing the waterproof mesh portion 11 toward the inner surface of the front housing 5.