| 摘要 |
<p>An earplug frame is provided, in which the length of earplug is controlled freely according to the top of the head of a user and which improves binding intensity. An earplug frame comprises: a coil spring(30); and a pair of ear cover frames which are inserted into the coil spring and are formed in a ring shape to cover the ear of the user. The radius of both ends of the coil spring decreases than the center and raises binding intensity of the earpiece frame. In the other end of the earplug frame inserted into the coil spring, a ball is formed. The ball hangs on the coil spring.</p> |
