| 摘要 |
A bellows pump which is further improved so that, without causing performance reduction and increases of the installation place and the cost, shock vibration which is generated in the timing of switching between suction and discharge can be suppressed is provided. A bellows pump having: a pump body 1 including a suction path 12 and discharge path 13 for a fluid; a bellows 2 which is placed in a state where a basal end flange 2a is airtightly fixed to the pump body 1 to form a pump chamber 11 with respect to the pump body 1; and an actuation plate 15 which is attached to a head portion 2c of the bellows 2 so as to cause the bellows 2 to expand and contract with respect to the pump body 1 is configured so that an airtight-like space portion 19 is formed with respect to the actuation plate 15 by forming the head portion 2c into a raised bottom shape, and a pressure rise can be absorbed and relaxed by contraction of the space portion 19 caused by elastic film deformation of the thin head portion 2c which faces the space portion 19.
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