Electrical connectors – Electromagnetic or electrostatic shield – Multi-part shield body
Reexamination Certificate
1999-08-20
2001-10-16
Sircus, Brian (Department: 2839)
Electrical connectors
Electromagnetic or electrostatic shield
Multi-part shield body
C439S939000
Reexamination Certificate
active
06302739
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an electro magnetic shield connector having a shield shell made of conductive metal for cover circumferences of a pair of male and female connecting terminals fitted into each other so as to electro-magnetically shield them.
2. Description of Relevant Art
As such an electro magnetic shield connector In the relevant art, there exists an electro magnetic shield connector which is includes a shield shell made of conductive metal for cover circumferences of a male and female connecting terminals fitted into each other. According to the construction, wire is electro-magnetically shielded.
However, faulty contact occurs in the electro magnetic shield connector. In addition, insertion operation can hardly be performed in a normal insertion position smoothly and easily. Furthermore, the shield shell can hardly be electrically connected with a case securely. Therefore, waterproofness of the electro magnetic shield connector in the relevant art is hardly improved.
SUMMARY OF THE INVENTION
The present invention has been achieved with such points in mind.
It therefore is an object of the present invention to provide an electro magnetic shield connector that even if a diameter of an insertion section of a mated connector scatters, faulty contact does not occur.
To achieve the object, according to a first aspect of the present invention, there is provided an electro magnetic shield connector comprising: a connector housing to be mounted to a case of an electrical equipment, a connector insertion chamber being formed inside the connector housing; a shield shell provided in the connector insertion chamber of the connector housing, the shield shell having a plurality of terminal contact spring pieces; a mated connector housing having an insertion section to be inserted into the connector insertion chamber; and another shield shell provided in the mated connector housing, wherein when the insertion section of the mated connector housing is inserted into the connector insertion chamber of the connector housing, the terminal contact spring pieces of the shield shell are elastically deformed so as to come in contact with the another shield shell provided in the mated connector housing; and the plural terminal contact spring pieces are composed of plural wider terminal contact spring pieces and plural narrower terminal contact spring pieces.
In the construction according to the first aspect, the wider terminal contact spring pieces and the narrower terminal contact spring pieces have different allowable stresses, and the terminal contact spring pieces with a larger diameter are inserted as the insertion section of the mated connector housing. Even if the wider terminal contact spring pieces function defectively due to excessive displacement, the narrower terminal contact spring pieces do not function defectively. As a result, faulty contact does not occur.
According to a second aspect of the present invention, as it depends from the first aspect, there is provided a electro magnetic shield connector wherein, the shield shell is formed into a cylindrical shape; the plural terminal contact spring pieces are provided on a peripheral direction of the cylindrical shape of the shield shell; the plural wider terminal contact spring pieces are arranged on a cylindrical portion of the shield shell so as to face each other; and the plural narrower terminal contact spring pieces are arranged on the cylindrical portion of the shield shell so as to face each other.
In the construction according to the second aspect, since spring forces are applied to the insertion section of the mated connector housing in a balanced state, the insertion operation can be performed in a normal insertion position smoothly and easily.
According to a third aspect of the present invention, as it depends from the first or the second aspect, there is provided an electro magnetic shield connector further comprising: case contact pieces provided on the shield shell, wherein when the connector housing is inserted into a connector insertion hole formed on the case of the electrical equipment, the case contact pieces are elastically deformed so as to come in contact with an inner surface of the connector insertion hole.
In the construction according to the third aspect, even if the mounting seat section is deformed due to a heat, the shield shell can be electrically connected with the case securely.
According to a fourth aspect of the present invention, as it depends from the first, second or third aspect, there is provided an electro magnetic shield connector further comprising: a mounting seat section which is composed integrally with the connector housing, the mounting seat section has a flange shape, the mounting seat section having a case contact surface to come in contact with the case of the electrical equipment, wherein bolt insertion through holes, into which bolts are inserted in order to mount the connector housing to the case of the electrical equipment, are formed in the mounting seat section; a seal groove, in which a sealing member for sealing the case of the electrical equipment and the case contact surface is inserted, is formed on the case contact surface of the mounting seat section; and the bolts are inserted through the bolt insertion through holes and the mounting seat section is fastened to the case of the electrical equipment so that the sealing member seals the case of the electrical equipment and the case contact surface.
In the construction according to the fourth aspect, since the sealing member (sealing ring) intervenes between the sealing connector and the case due to fastening force of the bolts, waterproofness becomes very high.
REFERENCES:
patent: 3614717 (1971-10-01), Boersma
patent: 3924922 (1975-12-01), DeCenzo
patent: 4099825 (1978-07-01), Jackson
patent: 4426127 (1984-01-01), Kubota
patent: 5052948 (1991-10-01), Hyzin
patent: 5195902 (1993-03-01), Bengal
patent: 5322459 (1994-06-01), Spinnato
patent: 5328393 (1994-07-01), Perret et al.
patent: 5810620 (1998-09-01), Kobayashi et al.
patent: 5-1182 (1993-01-01), None
Deno Masahiro
Matsumoto Mitsuhiro
Finnegan Henderson Farabow Garrett & Dunner L.L.P.
Le Thanh-Tam
Sircus Brian
Yazaki -Corporation
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