Electricity: electrical systems and devices – Housing or mounting assemblies with diverse electrical... – For electronic systems and devices
Patent
1996-05-28
1998-06-16
Picard, Leo P.
Electricity: electrical systems and devices
Housing or mounting assemblies with diverse electrical...
For electronic systems and devices
361737, 361752, 361800, 361816, 361747, 174 35R, 174 35GC, 439 761, H05K 500
Patent
active
057681104
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION:
The present invention relates to a plug-in card for electronic data processing equipment, and to a process for the manufacture and assembly of such a plug-in card.
Known plug-in cards, such as those offered as memory boards, modem cards, fax cards and the like in the PCMCIA standard, have a plastic frame to which one or two end connectors are attached and in which the printed circuit board fitted with electronic components is arranged and retained. metal covers are placed on either side of this plastic frame equipped in this way so that the printed circuit board and its components cannot be damaged by external mechanical effects. Since the plastic frame, which is difficult to manufacture and process, offers only limited stability, the metal cover must be expensively glued or welded so that the plug-in card assembled in this way is flexurally strong and torsionally rigid. In order to reduce the number of necessary components, attempts have already been made to integrate the end connectors into the frame, but this has made the assembly of the contacts difficult. A further problem with this known plug-in card is that there is no shielding against external electromagnetic influences in the region of the outer edges of the frame, in particular the longitudinal edges of the frame.
The object of the present invention is therefore to create a plug-in card of the type referred to above which, without impairing mechanical stability, can be manufactured in a simpler and more cost-effective manner with a reduced number of components and at the same time has adequate electromagnetic shielding. Moreover, a rapid and simple process for the manufacture and assembly of such a plug-in card is described.
SUMMARY OF THE INVENTION:
According to the invention, a plug-in card is provided which does not have a frame component, so the number of components is less and the card is less expensive. Furthermore, the connection between end connector and frame is eliminated, and the connection between end connector and printed circuit board remains. Mechanical torsional stiffness or stability, is attained by locking the housing parts together, thereby eliminating expensive gluing or welding. This type of assembly for the two housing parts can be effected in a very simple and rapid manner. Moreover, improved electromagnetic shielding is achieved since the housing parts overlap each other at least along the longitudinal sides of the plug-in card. A further advantage is that the printed circuit board inside the plug-in card can be enlarged by the space otherwise required for the frame.
The process according to the invention results in a simple and rapid assembly of the plug-in cards due to the reduced number of components. As before, the end connectors can be produced separately and therefore in a simple way. The simply assembled constructional unit comprising printed circuit board and one or two end connectors, can be first secured in a definite and uncomplicated manner in a first housing part. Then, the other housing part can be mounted without the need to provide special measures for the retention of printed circuit boards and end connectors in the one housing part. This results in a considerable cost reduction.
For the mounting of both housing parts, local pre-attachment of one housing part to the other via one of the end connectors can be achieved by means of a swinging movement. If required, machine-controlled mounting of the two housing parts can be provided. At the start of the swinging movement, the movement guides the two housing parts together, which increases the speed and reliability of the locking action.
A further increase in the torsional rigidity and the stability in relation to the flatness is obtained by bending to absorb material stresses which result from folded edges.
Electrical discharges and overvoltage is prevented. This is achieved much more simply without a frame by merely laying a housing part and printed circuit board on top of each other.
Further particulars of the invention are
REFERENCES:
patent: 5242310 (1993-09-01), Leung
patent: 5330360 (1994-07-01), Marsh et al.
patent: 5339222 (1994-08-01), Simmons et al.
patent: 5386340 (1995-01-01), Kurz
patent: 5414253 (1995-05-01), Baudouin et al.
patent: 5470237 (1995-11-01), Byczek et al.
patent: 5477426 (1995-12-01), Bethurum
patent: 5505628 (1996-04-01), Ramey et al.
Baginy Michael Duane
Etzkorn Roland
Frommer Juergen
Illg Manfred
Dinkins Anthony
ITT Cannon GmbH
Picard Leo P.
LandOfFree
Plug-in card for electronic data processing equipment and a proc does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Plug-in card for electronic data processing equipment and a proc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Plug-in card for electronic data processing equipment and a proc will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1733207