Electrical apparatus and method of manufacturing the same
AssigneeTamura Corporation
InventorTakayuki Tokairin
Life of this patent
Estimating the term…
Abstract
An electrical apparatus connected to a commercial power source includes: a case made of resin and housing a functional member; blades insert-molded in the case and each having an exposed part connected to the commercial power source and a resin facing part which is enclosed by the resin and all along an outer periphery of which a groove is formed; and elastic members each disposed between the resin and the resin facing part and having a fitting convex coming into close contact with the groove at the time of the insert molding.
Claims17
An electrical apparatus adapted to be connected to a commercial power source, the apparatus comprising:
- a case made of resin and housing a functional member;
- blades insert-molded in said case, wherein each of the blades comprises (i) an exposed part to be connected to the commercial power source, and (ii) and a resin facing part which is enclosed by the resin, wherein a groove is formed in the resin facing part, and the groove extends all the way around an outer periphery of the blade;
- and
- elastic members, each of which is disposed between the resin and the resin facing part of one of the blades and has a fitting convex that comes into close contact with the groove at a time of the insert molding.
A method of manufacturing an electrical apparatus which is adapted to be connected to a commercial power source, wherein the electrical apparatus includes a case that is made of resin and houses a functional member, and blades to be connected to the commercial power source, the method comprising:
- forming a groove all the way around an outer periphery of each of the blades in a resin facing part thereof, wherein the resin facing part of each of the blades faces the resin of the case in the completed electrical apparatus;
- loosely disposing cylindrical elastic members around the resin facing parts, respectively, to cover the resin facing parts by the elastic members;
- inserting the blades in a metal mold such that the elastic members are disposed in the mold;
- injecting the resin into the mold such that the elastic members are pressed into the grooves in the resin facing parts, respectively, thereby causing the elastic members to have fitting convexes which come into close contact with the grooves, respectively, and engaging concaves with which the resin comes into close contact;
- and
- solidifying the resin.
Dependencies are inferred from the claim text.