Electrical connectors – Preformed panel circuit arrangement – e.g. – pcb – icm – dip,... – Distinct contact secured to panel circuit
Patent
1995-07-27
1997-11-11
Abrams, Neil
Electrical connectors
Preformed panel circuit arrangement, e.g., pcb, icm, dip,...
Distinct contact secured to panel circuit
439 74, 439855, 439554, H01R 909
Patent
active
056857268
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a card connector for connecting boards. In particular, the invention relates to a card connector which has a reduced height or low profile over a circuit board when it is mounted on the circuit board.
BACKGROUND OF THE INVENTION
In the past, card connectors for connecting a mother board and a daughter board Rave been mounted on one surface of the mother board, with solder tails of the card connector soldered to solder pads on the same side of the mother board. Although various electronic component parts are also mounted on one surface of the mother board, the connection terminals of the electronic components are soldered on the other surface of the mother board via holes in the mother board.
Recently there has been growing demand for automating a soldering step for a board-to-board interconnect system. In this regard, it is desirable to achieve one step soldering of a card connector. In the aforementioned mount method, since the card connector and electronic component parts are soldered on the opposite sides of the mother board, the card connector and other electronic components cannot be soldered with one step.
Further, there is also a growing demand for a board-to-board interconnect system with a connector which extends only a short distance above the board surface. This demand stems, in part, from efforts to scale down or miniaturize electronic components and to achieve high component density. In the aforementioned mount method, since the card connector is mounted and soldered on the same surface of the mother board, there is an undesirable height of the card connector above the surface of the mother board. A need therefore exists to reduce the height of the card connector, i.e. a low profile connector.
In mounting the card connector, it is also necessary to change the existing mount method and to automate the soldering step.
SUMMARY OF THE INVENTION
In order to satisfy the aforementioned demands, a card connector is provided according to the present invention whereby it is possible to automate a soldering step during assembly while ensuring the minimal height of the card connector.
According to the present invention, a card connector is provided which connects a first and second boards. The first board has both a primary side and a solder side and a opening connecting the primary side to the solder side. The second board has contact pins. The aforementioned card connector has an elongated housing made of an insulating resin and fits in the opening of the first board. The card connector also has recesses which hold a plurality of contact terminals and receive the contact pins of the second board in the recesses. Each contact terminal has one end which is in contact with the contact pins of the second board. The other end of the contact terminal faces the solder side of the first board and is soldered to the solder side of the first board.
The housing further comprises first projections to contact the primary side of the first board and second projections to contact the solder side of the first board. The first board is held between the first and second projections. Hence, the housing is held in place with respect to the first board.
According to the card connector of the present invention, the housing is inserted into the opening of the first board, and the solder tail of each contact terminal is soldered to the solder side of the first board. As a result, it is possible to reduce the height of the housing which extends over the primary side of the first board. It is also possible to achieve the soldering of the solder tail of each contact terminal to an associated electronic component on the same side of the first board.
Since the first board is held by the first and second projections of the housing, the housing is held in place with respect to the first board. Even when the first board is inverted, the housing is kept in the position.
The second projections of the housing serve as a stopper whereby the housing is prevented from being over
REFERENCES:
patent: 3116960 (1964-01-01), Olsson et al.
patent: 3745510 (1973-07-01), Mallon
patent: 3951494 (1976-04-01), Romine
patent: 4934945 (1990-06-01), Nakamura
patent: 5169322 (1992-12-01), Frantz et al.
patent: 5197891 (1993-03-01), Tanigawa et al.
Lwee Nai Hock
Mitra Niranjan Kumar
Abrams Neil
Berg Technology Inc.
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