JPH0648786Y2 - LSI socket - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to an LSI socket, and more particularly to an LSI socket having a non-insertion force structure for mounting a pin grid array type LSI.

[Prior Art] Conventionally, this type of non-insertion force structure [ZIF (Zero insertio
n force) structure] LSI socket is shown in Figs.
It was as shown in the figure.

This LSI socket is composed of a base housing 9 and a cover housing 10.

The base housing 9 has pins 6 and contacts 8 of the LSI 5.
The contact 9 has a plurality of grooves 9a for inserting therein, and the lower portion of the contact 8 is projected from the lower surface. This contact 8 is pin 6 of LSI5
Has a shape capable of engaging with.

The cover housing 10 has a pin through hole 10a corresponding to the diameter of the pin 6 of the LSI 5, and is slidable on the base housing 9.

Therefore, in FIG. 5, the LSI 5 is inserted into the LSI socket with no insertion force, and then the cover housing 10 is slid in the direction of the arrow, so that the LS is contacted with the contact 8 as shown in FIG.
It has a ZIF structure that guides and contacts the pin 6 of I5.

[Problems to be solved by the invention] In recent years, the density of LSIs has been increasing and the pin diameter has also been miniaturized. In the structure in which the pin 6 of the LSI 5 is guided into the contact 8 fixed to the base housing 9, the pin 6 of the LSI 5 has a weaker strength as compared with the insertion force into the contact 8, and thus the pin 6 is bent.

[Means for Solving the Problems] The present invention has been made to solve the above problems. As a means for solving the problems, the LSI socket of the present invention is erected at a position corresponding to the pin of the LSI on the printed circuit board. A base housing slidably mounted on the printed circuit board, having a plurality of preload pins electrically connected to the printed circuit board, and a penetrating socket hole for receiving the preload pins; and mounting in the socket hole of the base housing. , A socket contact for electrically connecting the preload pin and the LSI pin, and a plurality of pin insertion holes for inserting the LSI pin at corresponding positions of the LSI pin, with the LSI pin inserted in the socket hole And a cover housing which covers the base housing and is fixed to the printed circuit board, wherein the preload pin is more than the pin of the LSI. Also, the socket contact has two upper and lower contacts, one contact is always in contact with the preload pin, and the other contact is the pin of the LSI when it is on the preload pin side due to the slide of the base housing. It is configured to be non-contact and contactable when it is on the opposite side.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing a state where the pins of the LSI of one embodiment of the present invention are not in contact, FIG. 2 is an enlarged sectional view taken along the line AA in FIG. 1, and FIG. FIG. 4 is a sectional view corresponding to FIG. 1 in a state, and FIG. 4 is an enlarged sectional view taken along the line BB in FIG.

This LSI socket includes a plurality of preload pins 4, a base housing 2, a socket contact 3, and a cover housing 1.

The preload pin 4 is the pin 6 of the LSI 5 on the printed circuit board 7.
Is erected at a position corresponding to and is electrically connected to the printed circuit board 7. The preload pin 4 has a larger diameter than the pin 6 of the LSI 5.

The base housing 2 has a socket hole 2a penetrating the preload pin 4 and is slidable with respect to the printed circuit board 7. The socket hole 2a is formed sufficiently large in the sliding direction so that the base housing 2 can slide with the preload pin 4 inserted.

The socket contact 3 is mounted in the socket hole 2a of the base housing 2 so that the preload pin 4 and the pin 6 of the LSI 5 are electrically connected. Further, the socket contact 3 has upper and lower two contacts 3a and 3b, one lower contact 3b is constantly in contact with the preload pin 4, and the other upper contact 3a is the preload pin 4 due to the slide of the base housing 2. When it is on the side, it is not in contact with the pin 6 of the LSI 5, and when it is on the opposite side, it can be contacted.

The cover housing 1 has a plurality of pin insertion holes 1a into which the pins 6 of the LSI5 are inserted at positions corresponding to the pins 6 of the LSI5.
The pin 6 is inserted into the socket hole 2a to cover the base housing 2 and is fixed to the printed circuit board 7.

Next, the operation structure of this LSI socket will be described in detail,
First, in the state shown in FIG. 1, the preload pin 4 engages with the socket contact 3 as shown in FIG. 2 which is an AA cross section, and the pin 6 of the LSI 5 can be inserted without contacting the socket contact 3. Has become. Therefore, if the pin 6 of the LSI 5 is inserted in this state, it can be inserted without inserting force.

Then, by moving the base housing 2 from this state in the direction of the arrow, the preload pin 4 is moved to the socket contact 3 as shown in FIG. 4 which is a sectional view taken along the line BB of FIG.
The structure is further separated and contacts the pin 6 of the LSI5.

Since the lower portion of the preload pin 4 is always in contact with the socket contact 3 and is further joined to the printed circuit board 7, the LSI 5 and the printed circuit board 7 are electrically connected in the state shown in FIG.

[Effects of the Invention] As described above, the LSI socket of the present invention provides the ZIF structure LSI socket by adopting the preload pin fixed on the printed circuit board and the socket contact that moves between the preload pin and the pin of the LSI. This has the effect of enabling reliable contact without applying a load to the pins of the LSI.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state where the pins of the LSI of one embodiment of the present invention are not in contact, FIG. 2 is an enlarged sectional view taken along the line AA in FIG. 1, and FIG. 1 is a sectional view corresponding to FIG. 1, FIG. 4 is an enlarged sectional view taken along the line BB of FIG. 3, and FIG. 5 is a sectional view of a conventional ZIF structure LSI socket LSI in a non-pin contact state, FIG. FIG. 3 is a sectional view of the contact state. 1, 10: Cover housing 2, 9: Base housing 3: Socket contact 4: Preload pin 5: LSI, 6: Pin 7: Printed circuit board, 8: Contact

Claims (1)

[Scope of utility model registration request] 1. A printed circuit board having a plurality of preload pins which are erected at positions corresponding to pins of an LSI on the printed circuit board and electrically connected to the printed circuit board, and through socket holes which receive the preload pins. On the other hand, a base housing slidably provided, a socket contact that is mounted in a socket hole of the base housing and electrically connects the preload pin and the LSI pin, and a plurality of LSI pins that are inserted at the LSI pin corresponding positions. And a cover housing that has a pin insertion hole, covers the base housing in a state where the LSI pin is inserted in the socket hole, and is fixed to the printed circuit board. It has a large diameter, and the socket contact has two upper and lower contacts, one of which is always in contact with the preload pin. LSI sockets other contact, characterized in that the LSI pins and a non-contact, and possible contact when in the opposite side when in a preload pin side by the slide of the base housing.