| 摘要 |
PROBLEM TO BE SOLVED: To prevent a cable from being caught when a light source unit and a display unit are attached to a body unit and improve the workability of attachment work.SOLUTION: A body unit 12 includes: a housing; and a lighting device. The housing has an opening. The lighting device is incorporated in the opening of the housing. A display unit 14 has a display part. The display part shows a predetermined pattern. The display unit 14 engages with the housing and thereby is fixed to a position such that the display unit 14 closes the opening of the housing. A light source unit has a light source. The light source is turned on by electric power output by the lighting device. The light source unit detachably engages with the housing or the display unit in a state that the display unit 14 is fixed to the housing. |
