Ddk Ltd.

Daiichi Denshi Kogyo Kabushiki Kaisha

Yukio Saitoh

Akio Yamada

Yoshiaki Igarashi

Jin-ichi Mashiyama

Fumio Furuya

Toru Shinozaki

An electrical connector includes a pin connector and a socket connector. The pin connector has a plurality of pin contacts, a required number of grand contacts and a block for holding the pin and ground contacts. The socket connector has a plurality of socket contacts, a required number of ground contacts and a housing for holding the socket and ground contacts. The block and housing are each formed from an insulating plastic material and formed with contact insertion apertures into which the contacts are inserted and fixed. Further, the block and housing each have metallized surfaces around the contact insertion apertures in a manner to electrically insulate these contact insertion apertures for pin and socket contacts independently from one another. The electrical connector thus constructed is easily and economically manufactured while being capable of achieving sufficient shielding effect leading to sufficiently high speed transmission.

Connector for use with high frequency signals

A socket contact includes a connection portion, a fixing portion, contact portions and connecting portions for connecting the contact portions to the fixing portion. The center axis of the contact portions are shifted from the fixing portion by bending the connecting portions in their planes. In producing the socket contact, a blank material is punched to form a flat socket contact whose two contact pieces arranged in parallel with each other are then bent inwardly to form a U-shaped form. Thereafter, connecting portions of the two contact pieces are bent in the planes of the connecting portions. This socket contact fulfills the requirement with respect to the miniaturization of connectors with very narrow pitches. There is no longer any risk of the distal end of a mating contact contacting the bottom surface of the fixing portion of the socket contact, so that the assembling of the connector becomes easy and the stable contact between the socket and mating contacts can be obtained.

Socket contact and method for producing the same

An electrical connector includes a plug connector and a receptacle connector to be fitted with each other. The plug connector includes a number of metal contact layers alternately formed on both sides of a flexible insulating plate, and a plug housing of an insulator for holding and fixing the insulating plate. Each of the metal contact layers has a contact portion and a tail portion, the former being thinner than the latter for maintaining the flexibility and electric conductivity of the former and maintaining the mechanical strength of the latter. The receptacle connector includes a receptacle housing of an insulator having a fitting groove into which the metal contact layers together with the insulating plate are inserted, and receptacle contacts made of worked elastic metal pieces mounted alternately on both sides of the fitting groove correspondingly to the metal contact layers of the plug connector. With such alternate arrangement of the metal contact layers or receptacle contacts, the spaced distances between the metal contact layers or receptacle contacts on one side are about twice the spaced distances between all the metal contact layers or the receptacle contacts.

Electrical connector

A miniature multiple electrical connector consists of a plug connector and a receptacle connector having an insulating block and a metal shell. The metal shell is fixed to the insulating block by fitting anchoring protrusions provided along both sides of the insulating block in anchoring apertures of fixing tongues provided on the metal shell. When the plug connector is being inserted into the receptacle connector, the metal shell of the receptacle connector is likely to be deformed by a metal shell of the plug connector. In order to prevent such a deformation of the metal shell, there is provided means for anchoring the center of the metal shell weakest in mechanical strength to the insulating block or means for preventing application of a force to the center of the metal shell when the plug connector is being inserted into the receptacle connector.

Growing community of inventors

Tokyo, Japan

Yukio Saitoh