Electrical connectors – With coupling movement-actuating means or retaining means in... – Including compound movement of coupling part
Reexamination Certificate
2001-01-17
2001-11-06
Abrams, Neil (Department: 2839)
Electrical connectors
With coupling movement-actuating means or retaining means in...
Including compound movement of coupling part
Reexamination Certificate
active
06312276
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a terminal for achieving a preferred electric and mechanic connection comprises a mounting portion suitable to be mount to a connector, which can achieve a preferred electric and mechanic connection with the electronic elements of an pin grid array (PGA) chip.
BACKGROUND OF THE INVENTION
In general, connectors are welded to a circuit board for receiving proper electronic elements so as to achieve a preferred connection between the electronic elements and the circuit board. For a pin grid array (PGA) chip, it is desired to have a zero inserting force (ZIF) as a terminal is inserted into the connector.
For the terminals of the connectors of a ZIF chip connector, the chip connector can be classified as two classes. In one kind, the terminal has a single one contacting arm, and a pin extending from a lower side of the chip serves to clamp the contact arm so as to achieve electric and mechanic connections between the connector and the pin of the chip. These kinds of terminals are disclosed in for example U.S. Pat. Nos. 3,315,212, 4,501,461, 4,674,811, 4,887,974, 4,988,310, 5,013,256, and 5,052,101, etc.
Another kind of terminal has two contact arms, in that a pin extends from the lower end of the chip serves to be clamped between two contact arms so as to achieve electric and mechanic connections between the connector and the pin of the chip. These kinds of terminals are disclosed in for example U.S. Pat. Nos. 3,676,872, 3,763,459, 4,331,371, 4,381,130, 4,397,512, 4,468,072, 4,498,725, 4,648,669, etc. Terminals with two contact arms have a preferred elasticity so that as the pin of a chip is inserted into the connector, a preferred electric and mechanic connection is achieved.
Referring to
FIG. 1
, a prior art terminal is shown, in that the terminal
10
a
has a Y shape and a bending portion
11
a
is installed at the middle portion thereof. A lower end of the bending portion
11
a
is formed with a thin long inserting portion
12
a
. The upper end of the inserting portion
12
a
is extended with two forked arms. The upper end of one arm is a contact portion
13
a
. The inner side of the contact portion
13
a
is extended with a tilt guiding portion
14
a
. Two sides of the upper end of the terminal
10
a
are formed with positioning teeth
15
a
for being buckled to the inner wall of the connector.
However, in the prior art terminal structure, the arms of the contact portion
13
a
are extended from the middle portion of the terminal
10
a
. The lower end of the arm has a wider portion serving to be connected to the upper end of the terminal
10
a
. Therefore, the elasticity of the contact portion
13
a
is low and the tightness of the terminal and the pin of a chip is not good so that it is hard to achieve a required electric and mechanic connection.
SUMMARY OF THE INVENTION
Accordingly, the primary object of the present invention is to provide a terminal structure, wherein the second arm of the contact portion extends from a first arm instead of extending from an upper end of the mounting portion. Furthermore, the connecting portion of the first arm is approximately equal to that of the second arm so that the second arm is formed with an elastic suspending arm which has a preferred elasticity and a strong force. The tightness between the terminal and the pin of the chip is good so as to achieve a preferred electric and mechanic connection.
To achieve the aforesaid object, the present invention provide a terminal structure comprising a mounting portion, an inserting portion, and a contact portion. The mounting portion has sides each having a positioning tooth; and the inserting portion is connected to a lower end the mounting portion. The contact portion is installed above the mounting portion, and a fork shape first arm and a fork shape second arm extends from an upper end of the mounting portion. The second arm has a connecting portion extending from a lower end at one side of the first arm for being formed as a suspending arm with a free upper end and slightly tilt to a front side or outer side of the terminal. The contact portion is connected to an upper end of the second arm. Therefore, a terminal is formed, which can achieve a preferred electric and mechanic connection with the electronic elements of an pin grid array (PGA) chip.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read conjunction with the appended drawing.
REFERENCES:
patent: 5443591 (1995-08-01), Tsai
patent: 5685748 (1997-11-01), Harting et al.
patent: 6074233 (2000-06-01), Lin
Abrams Neil
Dinh Phuong KT
Fullcom Technology Corp.
Rosenberg , Klein & Lee
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