34results about How to "Change use" patented technology

The utility model relates to a shouting fountain which comprises a fountain opening and a shouting microphone and further comprises a lower telescopic rod, an upper telescopic rod, a telescopic sleeve, a positioning piece, a reset piece and a driving piece, the inner diameter of the upper telescopic rod and the inner diameter of the telescopic sleeve are both larger than the outer diameter of the lower telescopic rod, and the telescopic sleeve is connected with the bottom of the upper telescopic rod. The shouting microphone is connected with the top of the upper telescopic rod, the inner ring of the telescopic sleeve is provided with a driving hole matched with the positioning piece, the outer wall of the lower telescopic rod is provided with a plurality of positioning holes which are vertically arranged and matched with the positioning piece, the reset piece applies acting force towards the positioning holes to the positioning piece, and the shouting microphone is connected with the top of the upper telescopic rod. And the driving piece controls the positioning piece to move back to the positioning hole. The utility model provides a shouting fountain of which the height is convenient to adjust.