Switch and method for manufacturing same
AssigneesCitizen Electronics Co., Ltd., Citizen Watch Co., Ltd.
InventorsTetsu Oyamada, Tsuyoshi Miura, Mitsunori Miura
Life of this patent
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Abstract
A switch that more reliably prevents solvent permeation from the outside, and a manufacturing method thereof are provided. The switch includes a first molded resin molded integrally with a plurality of fixed contacts by insert molding, a movable member disposed above the first molded resin to bring the plurality of fixed contacts into and out of contact with each other, and a second molded resin molded so as to close a through hole of the first molded resin formed by a pin supporting the plurality of fixed contacts at a time of the insert molding.
Claims4
A switch comprising:
- a first molded resin molded integrally with a plurality of fixed contacts, the first molded resin including a first through hole formed under the plurality of fixed contacts and a first projection portion formed on a bottom surface of the first molded resin;
- a movable member disposed above the first molded resin to bring the plurality of fixed contacts into and out of electrical contact with each other;
- and
- a second molded resin molded so as to cover at least the bottom surface of the first molded resin, the second molded resin including a second projection portion filling the first through hole and a second through hole filled with the first projection portion, the second through hole being formed in a bottom surface of the second molded resin,
- wherein the bottom surface of the second molded resin is a flat surface on which a resin boundary between the first molded resin and the second molded resin is formed.
A method of manufacturing a switch comprising:
- supporting a plurality of fixed contacts with a pin from below;
- molding a first molded resin integrally with the plurality of fixed contacts by insert molding so that a first through hole is formed at a position of the pin and that a portion of a bottom surface of the first molded resin projects downward;
- disposing a movable member for bringing the plurality of fixed contacts into and out of electrical contact with each other above the first molded resin;
- and
- molding a second molded resin by insert molding so as to cover at least the bottom surface of the first molded resin and fill the first through hole,
- wherein
- the second molded resin is molded so that a second through hole filled with a projection portion of the first molded resin is formed in a bottom surface of the second molded resin, and thereby the bottom surface of the second molded resin becomes a flat surface on which a resin boundary between the first molded resin and the second molded resin is formed.
Dependencies are inferred from the claim text.