(57) A pump dispenser is characterized by including a cap that is coupled with an opening
of a container, a button (150) that is ascendably provided in an upper end of the
cap (110) and that has a nozzle (170), a cylinder housing (210) that includes an inlet
through which contents of the container are received and a pump chamber (250) in which
the contents that are received from the inlet flow and that is coupled with the cap,
a check valve (310) that is provided in the inlet of the cylinder housing to prevent
the contents of the pump chamber from flowing backward to the container, a piston
(350) that gets close to and separated from the check valve, that includes a guiding
channel (370) in which the contents received to the pump chamber flow, and that ascends
together with the pump chamber, a stem (510) that includes a connecting channel (530)
that connects the guiding channel and the nozzle to each other and one end of which
is coupled with the button and the other end of which is coupled with the piston so
that the stem ascends, and a spring that is provided outside the stem to apply elastic
force to the stem. The pump dispenser includes a sealing member (410) that is provided
between the internal circumference of the cylinder housing and the external circumference
of the piston to seal a gap between the cylinder housing and the piston.
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