| 摘要 |
A stretchable tube equipped microphone comprises a base, a supporting shall, and an acoustic head, in which the supporting shaft is pivotally jointed to the base at one end and connected to the acoustic head at the other; a switch is disposed on the base; the supporting shaft is a stretchable two-piece tube composed of an upper and a lower tube, in which the upper tube is an unbendable but stretchable hard copper tube; the diameter of the upper tube is slightly smaller than that of the lower tube; the upper tube is composed of a plurality of stretching segments and one segment thereof is buried in the lower tube; the upper tube and the lower tube are connected with the acoustic head and the base, respectively. The height and angle of the acoustic head can be adjusted according to a user's stature when using the microphone. Besides, an electric cord in helical form is arranged in the supporting shaft such that it can be stretched together with the shaft, and the structure of stretchable tube could be applied to an ear-carrying microphone.
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