Power feed socket and contact point unit used therein

摘要

A terminal/fuse assembly is fitted in a cylindrical, metallic inner case. The terminal/fuse assembly disposes a terminal penetrating through a bottom wall, a fuse and a contact point disc that overlap inside a housing composed of a plastic cover plate and a fuse box. The fuse is provided with a fuse body at a tongue piece extending inward from a ring portion in a peripheral edge of an elastic conductive plate. A part of the ring portion is supported in the upward position from the terminal. The contact point disc in contact with the elastic conductive plate at the support portion presses the fuse body downward, and thereby the tongue piece makes contact with the terminal to be conductive from the contact point disc to the terminal.

主权项

1. A contact point unit used in a power feed socket supplying power to a plug of an electrical product by inserting the plug into a case comprising:
a first housing part made of resin; a second housing part made of resin that the first housing part overlaps to form a housing; a first terminal that extends outside of the housing through a bottom wall of the second housing part from the inside of the housing; a fuse comprising an elastic conductive plate and a fuse body that overlaps over the elastic conductive plate and is melted with overheating, the fuse being disposed in the housing in such a manner that a section of the elastic conductive plate different from an overlapping portion thereof with the fuse body is supported to an upper position separated from the first terminal; and a first contact point that is disposed on the fuse and is pressed from the first housing part, wherein the first housing part is provided with a window for exposing the first contact point in such a manner that an electrode of the plug is contactable with the first contact point, in a coupling state between the first housing part and the second housing part, the first contact point presses the fuse body to elastically deform the elastic conductive plate, which makes contact with the first contact point and the first terminal, thereby causing conduction between the first contact point and the first terminal, and when the fuse body is melted, the elastic conductive plate is elastically restored to be away from the first terminal, thus causing non-conduction between the first contact point and the first terminal.