Power connector having improved contact

Details Power connector having improved contact Power connector having improved contact

2002-11-01

2004-02-24

Paumen, Gary (Department: 2833)

Electrical connectors

Including or for use with coaxial cable

For cable having three or more coaxial conductors

C439S080000

Reexamination Certificate

active

06695644

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a power connector, and particularly to a power receptacle connector having improved contacts for reliably and stably engaging with a power plug connector.
2. Description of Related Art
Power connectors are widely used in electronic devices to transmit electrical power to the devices. Such power connectors are disclosed in Taiwan pat. No. 449,135, and U.S. Pat. Nos. 4,702,707, 5,376,012 and 6,190,215. Please refer to FIG.
10
and
FIG. 11
, Taiwan Pat. No. 449,135 discloses a power connector
9
which mates with a complementary connector
97
having two columnar contacts
95
and
96
, acting as a positive contact and a negative contact respectively. The power connector
9
includes a dielectric housing
90
, a U-shaped stationary switch contact
92
locating at a rear end of the housing
90
, a moveable switch contact
93
extending along a lateral side of the housing
90
, a conductive pin
91
longitudinally accommodated in the housing
90
, and a metal spring member
94
secured at an underside of the housing
90
. The inner contact
96
of the complementary connector
97
locates in a core of the outer contact
95
. An outer surface of the conductive pin
91
of the power connector
9
contacts an inner mating surface of the inner contact
96
. If the contact between the conductive pin
91
and the inner contact
96
is too loose, a reliable power transmission cannot be assured. If the contact between the conductive pin
91
and the inner contact
96
is too tight, the pin
91
and contact
96
are easily damaged after repeated mating/unmating of the connectors
9
,
97
. The moveable switch contact
93
and the metal spring member
94
contact the outer contact
95
in mutually perpendicular directions, whereby a force is acting on the outer contact
95
, which may result a deviation of the outer contact
95
from its original position. When this happens, a reliable power transmission between the connectors
9
,
97
can no longer be obtained.
U.S. Pat. No. 6,190,215 discloses a contact which mates with a male pin contact of any desired length. Mating portions of the contact are beam-shaped and are integrally stamped with soldering portions from a metal blank. The contact disclosed in U.S. Pat. No. 6,190,215 can resolve the problem caused by the removable switch contact
93
and the metal spring member
94
of the connector of Taiwan Pat. No. 449,135. However, the shortage of the contact between the conductive pin
91
and the columnar inner contact
96
is still not improved.
Hence, a power connector having improved contacts is desired to overcome the disadvantages of the prior art.
SUMMARY OF THE INVENTION
Accordingly, an object of the present invention is to provide a power receptacle connector having improved contacts for reliably and stably engaging with a power plug connector.
A power connector comprises an insulative housing, a first conductive contac and a second conductive contact. The insulative housing includes a receiving space defined rearwardly from a front surface of the insulative housing and an inner portion extending from a rear wall of the housing and bounded on its the receiving space. Each of the first and second contacts comprises a main body assembled in the rear wall of the housing, and a plurality of mating portions integrally formed with the main body adapted for engaging with a contact of a mating connector. The mating portions are assembled in the housing and are partly exposed in the receiving space. The mating portions of the first conductive contac are arranged on an outer circle, and the mating portions of the second conductive contact are arranged on an inner circle inside the outer circle.


REFERENCES:
patent: 4255011 (1981-03-01), Davis et al.
patent: 4307926 (1981-12-01), Smith
patent: 4702707 (1987-10-01), Hillbish
patent: 5376012 (1994-12-01), Clark
patent: 5547400 (1996-08-01), Wright
patent: 5676565 (1997-10-01), Vagnoni
patent: 5759069 (1998-06-01), Kitatani et al.
patent: 6042394 (2000-03-01), Mitra et al.
patent: 6190215 (2001-02-01), Pendleton et al.

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