| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problems that a connection tube is bent to be a substantially L shape in a conventional suction port, so that the stream of an air current becomes out of order in the part, and noise is generated. SOLUTION: A mouthpiece includes: a suction port body formed by putting an upper case over a lower case; a casing to be rotated in a height direction with respect to the suction port body; and a suction port joint to be rotated in a left and right direction with respect to the casing. The suction port joint is arranged in the lower part of the casing, and a tongue part is formed to be superimposed on the inner surface of the suction port joint. COPYRIGHT: (C)2004,JPO
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