CHECK VALVE, CAP WITH CHECK VALVE, JETTING PUMP PROVIDED WITH CHECK VALVE, AND FLUID VESSEL

摘要

Provided are: a check valve that is highly reliable with respect to sealing, is easily mass produced, and is compact; a check valve cap; a jetting pump provided with a check valve, and a fluid vessel. The check valve has a base (51), which is provided with a valve hole (52), and a film (71), which opens and closes the valve hole (52). The check valve (41) has a seal surface at the top surface thereof that is attached to an attachment subject. The film (71) overlaps in a manner so as to cover the valve hole (52) excepting a portion of the top surface of the base (51), and is adhered to a covered section in a manner so that: a discharge opening (76) is provided at a portion of the boundary line between the covered section at which the film (71) overlaps and a non-covered section at which the film does not overlap; and a discharge pathway is formed from the valve hole (52) to the discharge opening (76). The seal surface includes a portion of the boundary line, of the seal surface, the covered section at which the film (71) overlaps is adhered in a manner so that there is no greater than a predetermined level difference at the boundary with the non-covered section.