Electrical connectors – With coupling movement-actuating means or retaining means in... – Coupling part for receiving edge of planar board moving...
Reexamination Certificate
2002-10-17
2004-09-28
Nasri, Javaid H. (Department: 2839)
Electrical connectors
With coupling movement-actuating means or retaining means in...
Coupling part for receiving edge of planar board moving...
Reexamination Certificate
active
06796825
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Filed of the Invention
The present invention relates to an electrical connector, and more particularly to an electrical connector arrangement having a covering element and a joint portion, wherein the joint portion can be engaged with the covering element to form a floating adjustment space there-between so that any height difference within the electrical connector assembly parts due to welding can be effectively compensated.
2. Description of the Related Art
Due to the rapid advancement in computer and information technologies, nowadays desktop and notebook computers are very popular. Further, the need for smaller, thinner and compact, and faster electronic devices are greatly demanded in the present market. Electrical connectors are connected to a variety of circuit board, for example a memory chip module, for saving, transmitting and/or retrieving electronic data signals. Accordingly, smaller and compact connectors in computers are highly desirable meeting the market demand. The connectors in computers usually welded to the motherboard or interface card using a SMT (surface mounting technology), in this manner that there is no need to drill a hole for fitting signal contacts, thus a space occupation on the circuit board can be reduced. However, when a height difference during the welding phase or welding point formed while welding an adaptor using SMT is over the allowed range occurs, it causes biasing of the connector thus a reliable connection between the connector and the circuit board cannot be achieved.
Referring to
FIG. 15
, illustrates a conventional socket A comprising a plurality of signal contacts A
2
within a groove A
1
formed which is disposed in a central region of the socket A, and on each ends of the socket A comprises a slot A
3
. A latching element B is slid into the slot A
3
in order to detachably attach to the socket A. The latching element B comprises a positioning element B
1
and a resilient element B
2
. The positioning arm B
1
comprises a welding portion B
11
disposed at a bottom edge, bent inwardly. The signal contacts A
2
of the socket A, and the welding portion B
11
of the latching element B are welded onto the predetermined positions. Nevertheless, assembly of the above-mentioned socket A and the latching elements B, a height difference between three contact points, namely, the signal contacts A
2
and the two welding portions B
11
, with respect to a horizontal plane will invariably occur. The height difference allows only two contact points to come in contact with a circuit board, and the third contact point is raised in an upper position. Therefore, good connectivity cannot be achieved by using tin solution in the general welding process because the tin solution does not have a good extensity. Thus, a space formed at the welding point between the raised contact and the circuit board cannot be filled up using the tin solution in order to electrically connect the circuit board to a raised contact point. As a result this causes defects of the device and thus the reliability of the device is poor. Furthermore, when the memory chip module is obliquely pushed into the inner groove A
1
of the socket A, the inner groove A
1
is used as an axis to press the memory chip module downwardly, as a result, the edge of the memory chip module directly presses against the bulking block B
21
which is positioned on an inner side of the resilient arms B
2
attached to two sides of the latching element B, to securely buckle the edge of the memory chip module buckling to the base side surface of buckling block B
21
. Although this design can buckle the memory chip module, however as the memory chip module is forced in between the resilient arms B
2
, the resilient arms B
2
presses against the sides of the memory chip module due to the inertial property and the plastic material which causes the resilient arms B
2
to bend inwardly, while a bottom face of the memory chip module directly presses against the buckling block B
21
. Accordingly, the space available for memory chip module to buckle on to buckling block B
21
of resilient arm B
2
is small and therefore the fitting of the memory chip module between the two resilient arms B
2
is poor. When the memory chip module is shaken due to some external force, for example during maintenance, the memory chip module will easily come loose from the latching element B and get disconnected from the socket A.
Further, when the size of the buckling block B
21
of the resilient arms B
2
of the latching element B is enlarged in an attempt to secure buckling of the memory chip module, as the memory chip module is pressed downwardly against the buckling block B
21
, the two resilient arms B
2
will be forced outwardly or downwardly causing fracture or even break the resilient arms B
2
.
SUMMARY OF THE INVENTION
Accordingly, in the view of the foregoing, the present inventor makes a detailed study of related art to evaluate and consider, and uses years of accumulated experience in this field, and through several experiments, to create a new electrical connector for attaching a circuit board of the present invention. The present invention provides an innovated electrical connector for providing reliable electrical connections between the circuit board and the connector using SMT and for fastening or releasing a circuit board, which can effectively prevent the circuit board from coming loose and disconnected from the electrical connector by an unwanted external force.
Accordingly, an object of the present invention is to provide an electrical connector arrangement for providing reliable electrical connections between a circuit board and the connector using SMT.
Another object of the present invention is to provide an electrical connector having arrangement that allows the buckling arm of the electrical connector to move up and down within a floating adjustment space, thus a height difference between the socket and buckling arm due to welding can be effectively compensated.
Another object of the present invention is to provide an electrical connector having two resilient arms with sufficient buckling space for securely buckling a circuit board and to provide a proper electrical connection between the electrical connector and the circuit board.
Another object of the present invention is to provide an electrical connector having two resilient arms with sufficient buckling space for securely buckling a circuit board and effectively preventing the circuit board from coming loose and disconnected from the electrical connector by an unwanted external force.
In order to achieve the above objects and other advantages of the present invention, a connector for connecting a circuit of the present invention comprises a housing composed of an insulation material, a socket and two buckling arms detachably attached to two ends of the socket. The socket comprises a groove in a central region, and a row of signal contacts within the groove for attaching and electrically connecting with the circuit board. At two ends of the socket comprise two buckling elements. Each of the buckling elements comprises a buckling groove on a groove side and positioned adjacent to the groove. The socket is constructed from an insulation material. Each of the buckling arms comprises an insertion portion for engaging with each of the buckling groove of the socket, a plurality of gears disposed at a bottom edge of the insertion portion. A resilient arm and a base plate extend along the same direction from the insertion portion. The resilient arm comprises an arch-shaped structure biasing inwardly on a side and a securing element extending downwardly. The securing element comprises a pad clamps inwardly around two sides of the securing element. A distal end of the base plate comprises a positioning element folded inwardly. A lower edge of the base comprises a joint portion bent inwardly fitted having a hook buckling groove on its two opposite sides. A covering element comprising a fitting space with a buckling hook disposed extend
Birch & Stewart Kolasch & Birch, LLP
Le Thanh-Tam
Nasri Javaid H.
Speed Tech Corp.
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