| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a waterproof structure which can prevent the invasion of a liquid via a slit for passing a buzzer sound from a built-in buzzer unit to the outside in a printer. <P>SOLUTION: The buzzer unit 10 is arranged on the rear surface side inside the printer case 2 of the roll paper printer 1. The slits 14(1)-14(6) are formed in its protective cover 13 at constant intervals in the vertical direction horizontally for outputting the buzzer sound. The protective cover 13 is covered at constant intervals with the rear plate 25 of the printer case 2. Slits 29(1)-29(6) are formed also in the rear plate 25 at constant intervals in the vertical direction horizontally. The slits 29(1)-29(6) are arranged so as to be offset below the slits 14(1)-14(6). The liquid can be surely blocked from invading from the outside to a substrate 11 and a buzzer body part 12 in the buzzer unit 10. <P>COPYRIGHT: (C)2010,JPO&INPIT |
