Compression spring member and discharge device

Abstract

To provide a compression spring member that can be elastically deformed uniformly in a length direction and can obtain necessary elastic force.SOLUTION: A compression spring member 1 is made of synthetic resin and can be elastically deformed in a direction along a center axis O. Diameters of inner peripheral surfaces 2c, 3c of annular parts 2, 3 and inner peripheral surfaces 4g, 5g of elastic parts 4, 5 are expanded along the center axis O from the inner side toward the outer side of the compression spring member 1. Diameters of outer peripheral surfaces 2a, 3a of the annular parts 2, 3 and outer peripheral surfaces 4e, 5e of the elastic parts 4, 5 are expanded along the center axis O from the inner side toward the outer side of the compression spring member 1. Inclination angles of the outer peripheral surfaces 2a, 3a of the annular parts 2, 3 and the outer peripheral surfaces 4e, 5e of the elastic parts 4, 5 to the center axis O are equal to those of the inner peripheral surfaces 2c, 3c of the annular parts 2, 3 and the inner peripheral surfaces 4g, 5g of the elastic parts 4, 5 to the center axis O.SELECTED DRAWING: Figure 1

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