| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a foam dispenser capable of preventing air from leaking from a drain hole when pressing a pump head and capable of discharging water entering an air chamber during non-use from the drain hole. <P>SOLUTION: This foam dispenser includes: a cylinder part 17 comprising an air chamber 24 and a liquid introducing chamber 28; and a piston part 39 comprising a cylindrical piston member 15 sliding along an inner peripheral surface of the liquid introducing chamber 28 and an air piston member 16 sliding along an inner peripheral surface of the air chamber 24. An air chamber communicating part 28a disposed above a close-contact sliding part 15a of the cylindrical piston member 15 during non-pressing of a pump head 19 is formed at an upper part of the liquid introducing chamber 28. The drain hole 11 is formed in proximity with the close-contact sliding part 15a during non-pressing of the pump head 19 at a side surface of the air chamber communicating part 28a, and a communication interruption member 20 by means of an upper part cylindrical part 15b of the cylindrical piston member 15 is formed, for interrupting the communication state between the air chamber 24 and the air chamber communicating part 28a during pressing. <P>COPYRIGHT: (C)2013,JPO&INPIT |
