The Furukawa Electric Co., Ltd.

Yuzo Nakajima

Yasuki Kimura

Satoshi Kozawa

Masaaki Yamamoto

Takahiro Shimura

Hisao Enomoto

A ring member is disposed on a ring member mounting position. The ring member mounting position is a region between a pair of locking walls and is formed in a straight pipe shape. The ring member is in a substantially C shape with an opening at a part of its circumferential direction. The ring member may also be formed in a ring shape being connected at ring member joint parts. The ring member includes a reduced diameter part and first click parts protruding from the reduced diameter part substantially parallel in the pipe axial direction to form a slide guide. The ring member also includes second click parts of which outer diameters expand gradually from the reduced diameter part toward their tip ends. A male fitting part and a female fitting part are fitted with each other using the above ring member to obtain an electrical conduit. A connection structure for the electrical conduits, a bell block, a method for connecting electrical conduits, a method for connecting an electrical conduit and a bell block, a pipe coupling, and a ring member can be obtained thereby. The present invention can also provide a double-wall conduit of which an outer conduit is the electrical conduit having the same structures as the male fitting part and the female fitting part, a connection structure for the double-wall electrical conduits, and a conduit line using the connection structure.

Electrical conduit, connection structure for electrical conduit, bell block, method for connecting electrical conduit, method for connecting electrical conduit and bell block, pipe coupling, ring member, double-wall electrical conduit, and connection structure and conduit line for double-wall electrical conduit

A heat sink with fins comprising: a base plate made of a heat conductive material; a plurality of heat dissipating fins which are positioned in heat-dissipating-fin mounting portions formed on one surface of said base plate and are jointed to said base plate by mechanical crimping; and at least one heat pipe which is positioned in a heat-pipe mounting portion formed on an opposite surface of said base plate, portions in the vicinity of said heat pipe being crimped to joint said heat pipe to said base plate.

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Tokyo, Japan

Yuzo Nakajima