Electrical connectors – Contact comprising cutter – Insulation cutter
Reexamination Certificate
2000-07-28
2001-05-01
Sircus, Brian (Department: 2839)
Electrical connectors
Contact comprising cutter
Insulation cutter
C439S405000
Reexamination Certificate
active
06224416
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to an insulator-displacement type connector.
There has been disclosed in U.S. Pat. No. 4,435,035 an insulator-displacement type connector of such a structure. When assembling the connector, an insulator displacing terminal is set in a terminal accommodation chamber of a connector housing, and an insulated wire is pressed to the terminal, using an opening part of the housing. Then, an engagement projection at a front end of the cover is inserted under a front edge of the opening part from rearward, and a rear end locking part is locked with a rear end licking part of the housing from rearward, thus assembling the cover to the housing.
SUMMARY OF THE INVENTION
It therefore is an object of the present invention to provide an insulator-displacement type connector in which a series from pressure-fitting connection to assembly of a cover is automated.
To achieve the object, the invention provides an insulator-displacement type connector. The connector has a connector housing which has a terminal accommodating chamber for a terminal and has an upper wall defining an opening part for insulator displacement. The connector housing has a flexible engagement piece at a front edge of the opening part. The connector housing has a first locking piece at a rear end thereof. The connector has a cover which is assembled to the connector housing for closing the opening part. The cover has a second locking piece at a rear end thereof. The cover has an engagement projection at a front end thereof. When the cover is pushed down toward the opening part, the flexible engagement piece is locked with the engagement projection and the first locking piece is locked with the second locking piece.
Preferably, the first locking piece is provided on a first side of the connector housing and the second locking piece is provided on a second side of the cover.
A second aspect of the invention provides an insulator-displacement type connector. The connector has a connector housing defining a terminal accommodation chamber for an insulator displacing terminal. The connector housing has a wall covering the terminal accommodation chamber. The wall defines an opening corresponding to an insulator displacing part of the terminal. The connector has a first lug which projects from the wall toward the opening and has a first distal end. The connector has a cover to be pushed down normally to the wall of the connector housing for closing the opening of the wall. The connector has a second lug which projects from the cover for locking with the first lug and has a second distal end overlapping with the first distal end of the first lug.
Preferably, the first distal end of the first lug has a first inclined part relative to the second distal end of the second lug.
Preferably, the second end of the second lug has a second inclined part relative to the first distal end of the first lug.
A third aspect of the invention provides a manufacturing method for an insulator-displacement connector. The method has a step of pressing an insulated wire to an insulator displacing terminal in a terminal chamber of a connector housing, using a opening defined by the wall covering the terminal chamber. The method has a step of pushing down a cover toward the opening normally to the wall for a second lug to pass over a first lug to be locked with the second lug, the first lug projecting from the wall toward the opening, the second lug projecting from the cover.
According to the invention, when assembling the insulator-displacement type connector, an insulated wire is pressed to an insulator displacing terminal for contacting a conductor of the wire with the terminal, and a cover is pushed down toward an opening part from above as well as the wire. Then, an engagement projection at a front end of the cover is brought in contact with a flexible engagement piece. The engagement projection passes over the engagement piece with the engagement piece being flexed, thus to be locked with the engagement piece. At the same time, the second locking piece is locked with the first locking piece. Therefore, the cover is pushed down toward the opening part from above, so that a front end and a rear end of the cover are locked simultaneously.
REFERENCES:
patent: 4435035 (1984-03-01), Berry et al.
patent: 5123859 (1992-06-01), Davis et al.
patent: 5895285 (1999-04-01), Okabe
patent: 5980303 (1999-11-01), Lee et al.
Dinh Phuong K T
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Sircus Brian
Yazaki -Corporation
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