| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a suction passage device to the outside of an oral cavity for dental use capable of being miniaturized and made light in weight as the whole. <P>SOLUTION: This suction passage device 2 is formed of serially connected pipes 10-20 and a suction hood 30 is provided on the suction direction upstream end of the suction passage 2. Also, the suction passage 2 is provided with joint mechanisms 41-44 at intervals from a suction direction upstream side to a downstream side, and by turning the joint mechanisms 41-44, the direction of the suction passage 2 is changed at the joint mechanisms. Torque required for turning the joint mechanisms 41-44 is successively increased from the suction direction upstream side to the downstream side and the structure of the joint mechanisms is miniaturized and made light in weight when it is set more on the upstream side. <P>COPYRIGHT: (C)2004,JPO</p> |
