| 摘要 |
A tip-stop mechanism that can be efficiently and easily assembled. The rear side of a spout (1) fitted to the stem of a pump/aerosol container is opened and a needle valve (2) is placed from the opening side into a passage area (1f) formed in the front-rear direction. Next, a peripheral-wall rear cover (3) is fitted to the spout (1) from the rear. As a result, leg parts (3a) are latched and held in recesses (lc) of the spout (1), plate springs (3b) engage the tapered surfaces (2c) of the needle valve (2), and, by the action of the plate springs, the conical portion (2a) of the needle valve (2) closes a discharge hole (lh). When an operation lever (4) that is supported at its pivot shafts (4a) by recesses (lb) of the spout (1) and is in a stationary mode is pivoted, a receiving section (2e) of the needle valve (2) receives force from a portion (4b) of the lever to cause the needle valve (2) to move backward, setting the discharge hole (1h) to an open state. After that, the operation lever (4) engages the upper surface (lg) of the spout (1) and moves downward together with the spout and the stem, thereby the lever (4) is shifted to an operation mode. A tip-stop mechanism in which a vertical motion-type operation button is used is also disclosed.
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