| 摘要 |
PROBLEM TO BE SOLVED: To provide a game machine that can suppress occurrence of a situation with erroneous detection by a detection part that detects the presence of a substance.SOLUTION: A transparent plate holding frame 91 has a flat part 911 in a peripheral edge part 91a in an opposite position of a motion sensor 172 across virtual ranges (ranges (1,1) to ranges (3,3)) corresponding to the motion sensor 172. Even if the flat part 911 on which infrared light H1 is reflected is displaced due to displacement of the optical axis of the motion sensor 172 or other causes, reflected light H2 travels in a certain direction. The flat part 911 of the peripheral edge part 91a is inclined relative to a light receiving/emitting surface 54b of the motion sensor 172, and the reflected light H2 resulting from reflection of the infrared light H1 on the flat part 911 travels in a direction other than a direction to the corresponding motion sensor 172. |
