| 摘要 |
PURPOSE:To facilitate the management of production or the like by forming a land for switching functions including time setting, continuous striking, skipping and stopping and a land for switching the volume of time striking sound into one printed board. CONSTITUTION:A function switching land 4 and a sound volume switching land 5 each to be connected to the time striking sound function switching circut and the sound volume switching circuit are separately arranged in the electronic time striking circuit 3 formed on the printed board A. An inside contact plate 8 and a outside contact plate 9 each sliding in contact with the rands 4 and 5 are connected to the inner cylinder 11 and the outer cylinder 12 which are rotatable on the center equipped with the knobs 11a and 12a. The function and volume switching of the time striking sound is conducted separately by turning the knob 11a or 12a. A spring 13 is pressed against the spring setting groove formed on the outer surface of the inner cylinder and the inner surface of the outer cylinder to retain the switch setting position with both the cylinders securely. |
