Patent ID: 8689628

Claim:
A dust-proof structure for a measuring tool, comprising: a case being provided with an opening formed through a surface opposed to a bottom wall thereof; a first electronic component being accommodated in the case through the opening of the case; an intermediate panel being configured to press an outer circumferential portion of the first electronic component against the bottom wall of the case; a second electronic component being disposed at an inward portion of the intermediate panel and being opposed to the first electronic component with a gap; a cover being attached to the opening of the case to close the opening of the case; a securing unit being configured to secure the cover and the intermediate panel to the case; and a temporary-fixing unit being disposed between the intermediate panel and the case, the temporary-fixing unit being configured to temporarily fix the intermediate panel to the case while the outer circumferential portion of the first electronic component is pressed against the bottom wall of the case, the temporary-fixing unit including a recess formed in an inner circumferential surface of the case, and a projecting portion formed on an outer circumference of the intermediate panel to be engageable with the recess.