| 摘要 |
PURPOSE:To realize an instant attachment of the receptacle of an acoustic coupling device and to simplify the structure of the coupling device, by securing such constitution in that the cut edge of a circular holding bar of a receptable is put into the cut groove of the opening part of a casing and then the receptacle is turned to attach the same to the opening part of the casing. CONSTITUTION:A circular holding bar 13 having a cut part 17 at a part of the circumference surface is provided on the outer circumference surface of a receptacle 10 to which a transmitter microphone piece 12 is fitted in a body. An opening part 18 having a diameter smller than the outer diameter of the bar 13 and containing a cut groove 19 at a part of the circumference surface is formed to a casing 16. At the same time, a hooking projected part 20 is provided at the fringe part of the part 18 at the side of the back of the casing 16, and close to the groove 19. Thus either one of the edges 13a and 13b of the part 17 is put into the groove 19 and the receptacle 10 is turned. Accordingly the bar 13 is inserted into the part 18 through the groove 19 to ensure an instant attachment of the receptacle 10. |
