| 摘要 |
PROBLEM TO BE SOLVED: To improve voice transmission efficiency, to reduce cost, to improve cost effectiveness and to prevent damage caused by rolling fall. SOLUTION: A heat case part 2 and a grip part 3 are arranged in a dogleg- shape inclined at an obtuse angle. On the outside where the angle formed from the head case part 2 and the grip part 3 is big, the section of grip part 3 closer to the head case is protruded outside by a step part 4 and an infrared transmission part 6 is provided at the protruding part 5. When the grip part 3 is naturally grasped, the infrared transmission part 6 is set on the opposite side of human body without fail, the dead angle of infrared irradiation is minimized, and infrared irradiation efficiency can be improved. Besides, even when the hand is gradually shifted upwards from the first grasped position, it is regulated by the step part 4 and the infrared transmission part 6 can be prevented from being shielded by the hand. Besides, since the head case part 2 and the grip part 3 are inclined, even when the microphone is left on the table or the like, it can be prevented from rolling and falling. |
