| 摘要 |
PROBLEM TO BE SOLVED: To provide a laser inking unit employing a level in which the level can be adjusted even in a dark construction site. SOLUTION: The laser inking unit incorporates a light emitting component 12 for irradiating a level 1 so that it can be seen even in a dark place. More specifically, side face and bottom face of the level 1 are covered with a light reflecting structure, and 1 light emitted from the light emitting component 12 is irradiated from a part of the side face within the level. Since a bubble tube is illuminated by direct irradiation and by the light reflected on the side face and the bottom face, the level can be adjusted even in a dark place.
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