| 摘要 |
PURPOSE:To execute continuous adjustment of sound volume of an alarm watch by a simple constitution, by controlling the opening extent of a sound leading groove, through a sound volume variable element. CONSTITUTION:When a sound volume variable element 6 is turned through a stem 11, the extent of a gap opening which is formed by superposition of a sound leading groove 4 and a sound leading-in port 7, and is usually closed for waterproofing is varied, and the sound volume emitted through an opening window 9, a mesh cover 10, etc. is varied. Accordingly, it is possible to execute continuous adjustment of sound volume of an alarm watch without obstructing its waterproof property, by a simple constitution. |
