Power connector with safety feature
Electrical receptacle connectors are provided including an insulative housing and AC power contacts disposed therein that are configured for engaging an external power supply. The receptacle connectors are employed with a safety guard for restricting operator access to hot AC power contacts when disconnected from complementary header connectors. Preferred safety guards include projections extending along at least a portion of perimeter areas surrounding housing apertures that provide access to engaging portions of the AC power contacts. The projections define a safety gap between human digits directed toward the housing apertures and the AC power contacts.
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This is a continuation of U.S. patent application Ser. No. 10/352,531 filed Jan. 28, 2003, now abandoned the contents of which is incorporated by reference herein in its entirety.
FIELD OF THE INVENTIONThe present invention relates to electrical power connectors that are useful in circuit board or backplane interconnection systems. Connectors of the present invention include a safety feature that restricts access to hot AC power contacts housed within the connectors.
BACKGROUND OF THE INVENTIONThere has been significant evolution in the area of electrical connectors, with improvements including multi-function consolidation within a single connector housing, and employment of features for effective heat dissipation generated from electrical power transmission. For example, Clark et al., in U.S. Pat. No. 6,319,075, discloses an electrical connector including both power and signal contacts within a single insulative housing, thereby eliminating the need for two separate connectors. Preferred power contacts disclosed in the '075 patent employ a “dual-mass” principle that provides a greater surface area available for heat dissipation, as compared to “single-mass” designed contacts, such as, for example, those having a circular or pin-like cross section.
Electrical connectors similar to those above may further comprise an AC power cable port and AC power contacts for direct connection with an external power supply. Examples of such connectors are commercially available from FCI Electronics, Inc. FCI's PWRBLADE brand connector series includes a receptacle connector that consists of AC power contacts, DC power contacts, signal contacts, and a shrouded AC cable port. Each of the power contacts includes two contact walls with a space therebetween to facilitate heat dissipation. Two patent applications owned by the assignee of the instant application and generally related to power distribution connectors, U.S. patent application Ser. No. 09/160,900 filed Sep. 25, 1998 and Ser. No. 09/944,266 filed Aug. 31, 2001, are currently pending in the U.S. Patent & Trademark Office, and are incorporated by reference herein.
Power distribution connectors that are engaged with an AC power cable plug when the mating face is unconnected to a complementary connector, may provide access of foreign objects to engaging portions of the hot AC power contacts. Accordingly, there is room for improvement in the art.
SUMMARY OF THE PRESENT INVENTIONThe present invention is related to electrical connectors having contacts for transmitting electrical power and electrical signals in a single connector. In accordance with a preferred embodiment of the present invention, there has now been provided an electrical connector comprising an insulative housing including a connector mating face, and an AC power contact disposed in the insulative housing. The connector mating face comprises an aperture to provide access to an engaging portion of the AC power contact, and a guard for preventing direct human touching of the engaging portion.
In accordance with another preferred embodiment of the present invention, there has now been provided an electrical connector comprising an insulative housing, and an AC power contact disposed in the insulative housing. The power contact includes an engaging portion comprising two spaced apart contact walls. The insulative housing includes a mating face having an aperture therein to provide access to the AC power contact, and a guard proximate a perimeter of the aperture to define an electrical shock safety gap of at least about 5 mm between a human digit that is directed towards the aperture and the engaging portion of the AC power contact.
In accordance with yet another preferred embodiment of the present invention, there has now been provided an electrical connector comprising an insulative housing having a mating face, a plurality of AC power contacts, a plurality of DC power contacts, and a plurality of signal contacts. The mating face comprises a plurality of spaced apart apertures to provide access to a mating portion of a power or signal contact, and at least one outwardly directed projection extending along at least a portion of a perimeter defined by each of the apertures corresponding to the plurality of AC power contacts.
These and various other features of novelty, and their respective advantages, are pointed out with particularity in the claims annexed hereto and forming a part hereof. However, for a better understanding of aspects of the invention, reference should be made to the drawings which form a further part hereof, and to the accompanying descriptive matter, in which there is illustrated preferred embodiments.
The present invention is believed to be best understood through the following detailed description of preferred embodiments and the accompanying drawings wherein like reference numbers indicate like features. Referring to FIG. 1, an electrical receptacle connector 10 is shown including an insulative housing 12 having a mating face 20 for receiving a complimentary header connector (not shown). Mating face 20 contains a plurality of apertures that provide access to electrical contacts disposed in insulative housing 12. Apertures 30 provide access to engaging portions of signal contacts 100, apertures 31 provide access to engaging portions of DC power contacts 80 (shown in FIG. 7), and apertures 32 provide access to engaging portions of AC power contacts 70 (shown in FIG. 6). Although the number and arrangement of the various apertures is identical in all of the figures herein, connectors covered by the appended claims may have any number of contacts and corresponding apertures that are arranged in various configurations.
A shrouded AC cable port 40 extends from a top portion 21 of housing 12. An external power supply is provided by way of an AC power cable plug 41, which is shown partially inserted within AC cable port 40. Preferred connectors may alternatively be configured so that AC cable port 40 extends from a bottom portion or rear portion of housing 12. AC power cable plug 41 engages vertically-oriented AC power contacts 70 (shown in FIG. 6). An anti-shock guard 50 is employed to restrict direct operator access (that is, direct human touching without the aid of a tool) to the hot AC power contacts 70 during times when AC power cable plug 41 is engaged and receptacle connector 10 is disconnected from a complementary header connector.
Preferred exemplary embodiments of anti-shock guard 50 will be described with reference to
Now referring to
As can be seen in
Housing 12, AC cable port 40, and anti-shock guard 50 are preferably molded or formed from a glass-filled high temperature nylon or other materials known to one having ordinary skill in the art. AC cable port 40 and anti-shock guard 50 may be integrally molded with housing 12, or alternatively, be manufactured separately and then coupled to housing 12.
Power circuits can undergo changes in electrical properties because of the relatively high current flows, for example, on the order of 30 amps or more in certain electronic equipment. Preferred power contacts are designed to dissipate heat generated from power transmission so that changes in circuit characteristics are minimized. A preferred AC power contact 70 is shown in
Referring now to
Power contacts 70 and 80 are preferably loaded into housing 12 from the rear. The contact walls and/or bridging element of the AC and DC power contacts 70, 80 may contain notches or other female elements, and/or tangs or other male elements for retaining the power contacts in housing 12. Preferred power contacts 70 and 80 are stamped or otherwise formed as single piece from suitable materials such as phosphor bronze alloys or beryllium copper alloys. Signal contacts 100 (shown in
It is to be understood that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only. Accordingly, changes may be made in detail, especially in matters of shape, size and arrangement of features within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.
Claims
1. An electrical connector, comprising:
- an insulative housing including a connector mating face;
- a DC power contact disposed in said insulative housing, said DC power contact comprising a pair of opposed and spaced apart contact walls, and one or more terminals extending from one of the contact walls for engaging a circuit board;
- an AC power contact disposed in said insulative housing; and
- a shrouded AC cable port extending from said insulative housing at a location that is different from that of said connector mating face;
- wherein said connector mating face comprises: an aperture therein to provide access to a engaging portion of said AC power contact; a perimeter area adjacent said aperture; and a guard proximate said perimeter area for preventing direct human touching of said engaging portion of said AC power contact.
2. The electrical connector according to claim 1, wherein said AC power contact comprises a pair of opposed and spaced apart contact walls, and a tab extending from at least one of the contact walls.
3. The electrical connector according to claim 1, further comprising a plurality of signal contacts disposed in said insulative housing.
4. The electrical connector according to claim 1, wherein said guard comprises at least one projection extending outwardly from opposing sides of said perimeter area.
5. The electrical connector according to claim 4, wherein said guard comprises two spaced apart projections extending outwardly from each of the opposing sides of said perimeter area.
6. The electrical connector according to claim 3 5, wherein said two spaced apart projections are dissimilar.
7. An electrical connector, comprising:
- an insulative housing including a connector mating face including first and second apertures formed therein;
- a first type of power contact disposed in said insulative housing and accessible through said first aperture;
- a second type of power contact disposed in said insulative housing, said second type of power contact being accessible through said second aperture and having a different configuration than that of said first type of power contact; and
- at least one projection extending outwardly from said connector mating face and along at least a portion of a perimeter of said first aperture to inhibit entry of a human digit into said first aperture,
- wherein said first type of power contact comprises a pair of opposed and spaced apart walls, at least one of which includes a tab for engaging an AC power cable plug; and wherein said second type of power contact comprises a second pair of opposed and spaced apart walls including a plurality of terminals extending therefrom for engaging a printed circuit board.
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Type: Grant
Filed: Sep 27, 2007
Date of Patent: Apr 27, 2010
Assignee: FCI Americas Technology, Inc. (Carson City, NV)
Inventors: Robert F. Evans (Bedford, NH), Jeffrey W. Allison (Etters, PA), Brian M. Rohrbaugh (Glen Rock, PA)
Primary Examiner: Briggitte R Hammond
Attorney: Woodcock Washburn LLP
Application Number: 11/862,464
International Classification: H01R 13/64 (20060101);