| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent deterioration in durability of a valve part due to deformation of the bent part of a retainer formed integrally with a gasket during regulation of the opening of a valve part of a lead type discharge valve, to prevent the change of the elastic factor of the valve part of a discharge valve and deterioration in durability due to deformation of the bent part of a retainer owing to crushing of an elastic layer during assembly, and to reduce a manufacturing cost. SOLUTION: A discharge chamber 92b is formed in a rear housing by a partition wall 92c. The partition wall 92c comprises a most protruding first end face 92i; a taper surface 92j formed in an inclining-rearward state; and a second end face 92k protruding to a level lower than that of the first end face 92i. The first end face 92i forms a press part 1, and a clearance between the taper surface 92j and the second end face 92k forms a release part 2. A chamfer 921 is formed, and a boundary 92m between the second end face 92k and the chamber 921 forms a support part 3.</p> |
