Electrical connectors – Preformed panel circuit arrangement – e.g. – pcb – icm – dip,... – With provision to conduct electricity from panel circuit to...
Reexamination Certificate
1998-11-25
2001-02-27
Donovan, Lincoln (Department: 2832)
Electrical connectors
Preformed panel circuit arrangement, e.g., pcb, icm, dip,...
With provision to conduct electricity from panel circuit to...
C439S070000
Reexamination Certificate
active
06193525
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a socket, particularly, an IC socket, for an electrical part or component, such as a semiconductor device (hereinafter, referred to as an IC (Integrated Circuit) package), which holds detachably the electrical part.
As a conventional socket for an electrical part, which is capable of holding the electrical part, in order to put an IC package as the electrical part to a performance test, such as a burn-in test or other similar tests, there is a socket adapted to hold the IC package to be tested.
The socket for the electrical part has a socket body on which the IC package is mounted and a hold cover pivotally attached to the socket body. The hole cover is adapted to pivot downward so as to hold the IC package mounted on the socket body from an upper side of the IC package. A plurality of electrodes disposed to the IC package are so pressed, by a predetermined pressure caused by the hold cover, as to be welded to electrical conductive members disposed to the socket body.
However, in the conventional socket described above, the hold cover is adapted to pivot about a pivot pin or shaft (hereinafter, referred to a pivot pin) of the socket body and is not adapted to move vertically from an upper side of the IC package to a lower side thereof so as to hold the IC package. Therefore, since, while the hold cover pivots about the pivot pin, one portion of the hold cover adjacent to the pivot pin firstly presses the IC package and, after that, another portion of the hold cover adjacent to the pivot pin presses it, it is difficult to press the IC package simultaneously by the one and another positions thereof.
As a result, the portion of the IC package adjacent to the pivot pin of the socket body, which is firstly pressed by the hold cover, is subjected to a large pressure thereby deforming the electrodes disposed to the firstly pressed portion of the IC package and deforming the IC package itself, and therefore, there is a possibility that an IC chip included in the IC package is damaged.
Especially, in the socket for holding a large-sized IC package or a semiconductor device having a printed circuit board or a printed board (hereinafter, referred to printed circuit board) on which a plurality of IC chips are mounted and operative to one package, the above inconveniences of deforming the electrodes of the IC package and the IC package itself are remarkably exposed.
SUMMARY OF THE INVENTION
The present invention is directed to overcome the foregoing problems. Accordingly, it is an object of the present invention to provided a socket for an electrical part, which is capable of pressing, in a balanced state, the electrical part, such as an IC package, so as to prevent electrodes of the IC package and the IC package itself from being damaged.
Another object of the present invention is to provide a socket for an electrical part, which can reduce a space which allows the member to pivot upward so as not to need to take up much space from an upper side of the socket.
These and other objects can be achieved according to the present invention by providing a socket for an electrical part comprising:
a socket body having one surface on which the electrical part having a terminal is mounted;
an electrical conductive member disposed to the socket body and adapted to contact the terminal of the electrical part so as to establish an electrical connection between the socket body and the terminal;
a press member mounted to the socket body and adapted to press the electrical part; and
support means disposed to the socket body and adapted to support the press member to an open position located away from an upper side of the one surface of the socket body for pivoting the press member positioned to the open position to a close position located in the upper side of the one surface thereof and for moving the press member pivoted to the close position toward the electrical part on the one surface of the socket body so as to press the electrical part thereto.
In a preferred embodiment, the press member pivoted to the close position is arranged in parallel to the one surface of the socket body so as to move by the support means in parallel to a vertical direction orthogonal to the one surface of the socket body. The support means comprises an upper operation member disposed to the socket body so as to be movable along the vertical direction and a support device operatively joined to the upper operation member and the press member and adapted to operate together with the movement of the upper operation member, and when the upper operation member moves downward along the vertical direction, the support device operates according to the movement of the upper operation member so that the press member positioned to the close position moves upward along the vertical direction while pivoting to the open position, and when the upper operation member moves upward along the vertical direction, the support device operates according to the movement of the upper operation member so that the press member pivots from the open position to the close position and moves downward in parallel to the vertical direction, whereby the press member presses the electrical part mounted on the one surface of the socket body. The electrical part has one surface mounted on the one surface of the socket body and other surface facing the press member located to the close position and the press member presses the other surface of the electrical part.
The press member comprises a pair of press members having a structure capable of being opened and closed like biparting doors. The support means includes an elastic member adapted to urge the upper operation member with a predetermined urging force upward along the vertical direction, while each of the press members is arranged to each side portion of the socket body corresponding to the open position, the upper operation member being biased to a predetermined position against the urging force, and when the upper operation member moves upward along the vertical direction by the urging force from the predetermined position, each of the press members pivots from each side of the socket body toward the close position.
When the press member is located to the close position, the press member has a flat plate portion opposite to the one surface of the socket body and substantially parallel to the one surface thereof, and the electrical part is pressed in a balanced state by the flat plate portion of the press member. The press member is located to the open position, and the flat portion of the press member is a rranged substantially along the vertical direction in which the flat portion of the press member allows the electrical part mounted on the one surface to be removed therefrom.
The support device has a support member disposed to the socket body to be movable along the vertical direction, the press member being mounted pivotally on the support member and link means joining the support member with the upper operation member and pivotally mounted on the socket body, wherein, when the upper operation member moves downward along the vertical direction, the support member moves upward therealong with a pivotal operation of the link means together with the press member and pivots from the close position to the open position, and when the upper operation member moves upward along the vertical direction, the press member pivots from the open position to the close position and moves downward along the vertical direction with a pivotal operation of the link means.
The link means has two pairs of link members each of which has one end portion, another end portion, a middle portion, a pin hole formed through the middle portion, a support pin attached to the socket body and inserted in the pin hole for pivotally supporting the link member about the support pin, a first long hole formed through the one end portion, a first pin attached to the upper operation member and fitted idly in the first long hole, a second long hole formed through the another end p
Donovan Lincoln
Enplas Corporation
Fish & Richardson P.C.
Lee Kyung S.
LandOfFree
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