| 摘要 |
PURPOSE:To position the stem relative to the housing so as to positively guide the stem in the direction in which it ought to move as intended and tighten the seal between the stem and a blocking part in such a manner as to prevent an impulse therebetween. CONSTITUTION:Inside a housing 2 in which a through hole 3 is formed a stem is provided, which moves with its outward circumferential surface 6a separated from an inward circumferential surface 2a and between a first position wherein a space 4 does not communicate with the outside and the contents are allowed in through the through hole 3 and a second position wherein the inflow of the contents is stopped and the space 4 communicates with the outside. Projections 13 are provided at arbitrary intervals circumferentially on the outward circumferential surface 6a and placed virtually in contact with the inward circumferential surface 2a. Furthermore, the stem 6 is provided with a projection for blocking up the inlet of a passageway 7 until, when the stem 6 moves from the first position to the second position, a bending working part 16 causes a blocking part 8 to assume a bent state corresponding to a closed state of the inflow channel from the through hole 3. |
