| 摘要 |
PROBLEM TO BE SOLVED: To obtain a laser marking device in which a laser beam is not emitted to the outside when the deflection angle of a support arm is at a limit or higher by a method wherein a slender slit hole in the vertical direction in a laser radiation window and angles of inclination along two equiangular sides in which a prescribed position on the extension line of the center line in the longitudinal direction of the slit hole is used as a vertex are formed at opposite long sides. SOLUTION: Angles of inclination along an equiangular sideΔ1 and an equiangular sideΔ2 in which a prescribed position on the extension line H of the center line C in the longitudinal direction of a slit hole is used as a vertex O are formed at two opposite long sides 321 of a laser emission window 32. The interval between the long sides 321 of the emission window 32 is made larger with reference to a laser beam B. When a laser marking device is placed on a horizontal fixed face so as not to be tilted, the emission window 32 is situated in an erect position N, and the laser beam B is emitted to the outside via the emission window 32. In addition, when the laser marking device is placed so as to be tilted, the emission window 32 is tilted to a tilted position L or R. However, the laser beam B holds its vertical state due to the pendulum motion of a support arm. In addition, the angle of inclination of the emission window 32 is set preferably at 6 deg. or lower.
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