JPS58206146A - Socket for large-scale integrated circuit - Google Patents

Abstract

PURPOSE:To prevent the generation of a couple of forces in a housing extremely by setting a connecting point of a connecting groove and the connecting section of a hook plate where agreeing with a line of action of a resultant force of the support reaction of a contact in the case when the contact is in contact with an LSI or where adjacent to said position. CONSTITUTION:The hook sections 26 of a hook plate 22 are inserted among the lug sections 19 of a cam plate 18. The plate 18 is turned in the direction of the arrow 29, and the sections 26 are made run on the sections 19 by inclined planes 31 at one ends of the sections 19. The connecting groove 27 of the lower surface of the housing 11 is formed at a position including the line of action of the resultant force F of the support reaction P of the contacts 12 in the case when both the contacts 12 on the outside and the inside are in contact with the LSIs 13. When the connecting section 25 of the plate 22 is connected to the groove 27, the connecting point agrees with the line of action of the force F or is positioned at a section adjacent to said position. Accordingly, the generation of a couple of forces in the housing 11 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a socket used for connecting an LSI, which has a plurality of rows of external connection P7 cards around the - side.

The L of the tights that presses against the LSI A1 contact.
As an SI socket, the one shown in FIG. 1 or 2 is known. 1 by means of a locking cover 2 which engages the periphery of the housing 1.

Q pad 4 for external connection of LSI 3 is pressed against contact 5 to make contact. In addition, FIG. 2 shows that the curved end of the cover 7, which has one end as the hinge 6, is connected to the housing by using a clasp 8.
A presser spring 9K provided on the cover 7 presses the LSI 3 toward the contacts 5.

Note that 10 is a printed circuit board.

These conventional sockets have a locking cover 2 and a locking plate 8 engaged with the periphery i1) of the housing.
Otherwise, there is a risk that the housing will be distorted and a sufficient contact force will not be obtained. This point will be explained using FIG. Figure 3 shows 1.・Contact 5 and L
Based on the contact force P between SI 3 and P7 and 4, the contact support part of the housing l (/Cjnl and the force P
is generated downward, -1, through LSI3 [''7
Similarly, a pulling force is applied to the tip of the arm of the king cover 2. As a result, when the action of both forces and the distance between the gaps of 1" and 1" is L, a couple of forces PXL are generated for each contact 5 on the housing song 1, and the floating force from the cylinder board 10 and the floating force on the housing song 1 are generated. A phenomenon occurs.

And due to these distortions, LSI 3 and contact l-
5, there was a risk that sufficient contact force could not be obtained to achieve the stable contact that was aimed for due to the design.

Furthermore, in the past, in order to obtain a constant contact force with the contacts even if the manufacturing tolerance of the LSI board thickness was large, the cover was provided with spring properties so that the LSI was always pressed against the housing. However, it is necessary to connect an LSI with a tM sequence of tM number sequences, which requires 1 month of external failure.
As shown in the figure, as the number of cores increases, the force applied to the cover also increases, making it difficult to obtain sufficient springiness to withstand the force.

As the number of cores increases, there is also the problem that it becomes difficult to connect the cover to the housing song due to the 1/(large) J.

Therefore, the present invention [1 r[, contacts in multiple rows t
The purpose of this invention is to prevent the generation of force couples within the housing as much as possible in the pressing contact type LSI socket iζ provided with tC.

A further object of the present invention is to provide a pressing contact J11! LSI socket with spring properties that can accommodate the manufacturing tolerance of the LSI board thickness by J' even when the number of cores is large.

The present invention also provides a push-contact type LSI socket in which the cover is easily damaged even when the number of pins is large.

The present invention will now be described using examples with reference to FIG.

Figures 4 to 6 show one example of the LSI know-how according to the present invention.
The cross-sectional view shows the state in which the 1-piece is installed. This LSI socket has a large number of 9 parts around the negative side.
x, sr having ξ71゛ in multiple rows, for example, two rows:
<S-The receiver includes a rectangular insulating housing 11 into which it is placed. The housing 11 has a large number of conductive contacts (71) 12 near each of the four sides, L
SI: The same number of rows as the external connection grid of 3, that is, one row for each row is installed and held here. contact)
12r, t.

It has a contact portion 13 that comes into elastic contact with an external connection pad on the lower surface of the LSI 3 that has been fitted into the housing 11 and is separated, and is drawn out through the housing 11 to the outside. .

and the part pulled out to the outside of the contact 12】4 is 1
For example, it is passed through the through-pole 151fC of the cylinder board 1o and then soldered 16 is applied.

By the way, after fitting the LSI 3 into the Howsong 11, attach the cover plate 17 to it.

Furthermore, a ring plate-shaped camsolate 18 is placed thereon. As is clear from FIG. 4, the cam grate 18 has four projecting portions 19 projecting outward in the direction of Ij4'f:H, and these projecting portions 19 are connected to the claws 21 of the cover plate 17. By engaging with the cover plate 17, it is assembled to the upper surface of the cover plate 17 so as to be rotatable.

Furthermore, hook plates 22 are provided on the west side of the housing 11, respectively.
Mate and install. The hook plate 22 is fitted to the housing 1.
1 by a protrusion 23 on one side. Note that protrusion 3
teeth? After the fitting plate 22 is fitted, the diameter of the tip plate 22 is increased by heating the tip plate 1 and crushing the push plate 1.
There are no steps to prevent it from coming off.

The bottom surface of the housing 11 is provided with L7', which is inserted between a plurality of guide protrusions 24' that are spaced apart and correspond to at least the outer row of contacts. It has an integral part 25 and a lip part 26 that engages with the L part of the projecting part 9 of the cam grate 18. Here, the engaging part 25 is formed in a comb-tooth shape.
, passing through the outer row of contacts, contact 1
The housing 11 is engaged with an engagement groove 27 formed on the lower surface of the housing 11 between the outer row and the inner row of the housing 11.

The flap plate 22 and the cam plate 18 are initially attached in the relationship shown in FIG. That is, the hook portions 26 of the hook plate 22 are inserted between the projecting portions 19 of the cam plate 18. Thereafter, the cam plate 18 is rotated in the direction of the arrow 29 using, for example, a tool engaged with the hole 28, and at this time, the hook portion 26 is moved by the slope 31 at one end of the projecting portion 19 as shown in FIG. and ride on the protruding portion 19. In other words, the projecting portion 19 is inserted below the hook portion 26. As a result, the housing 11 and the cover plate 17 are strongly sandwiched between the cam plate 18 and the hook plate 22. That is, cam system 1
-18 and the seven-piece plate 22 constitute a locking device.

The engagement groove 27 on the lower surface of the housing 11 still acts as the resultant force F of the supporting reaction force P of the contacts 12 when both the outer row and the inner row of contacts 12 contact the LSI 3 (I'1 neck). When the engagement portion 25 of the plate 22 engages with the engagement 777 in the A1 device;
The line of action of the resultant force F coincides with or is close to the line of action of the resultant force F. Therefore, the occurrence of the coincidence j) within the no unong ll is prevented.

Furthermore, the engaging portion 25 of the Kukiru 22 has a comb-toothed shape to allow elastic deformation to occur externally.

(N Even if the thickness varies, LSI 3 is firmly pressed against housing II. Therefore, contact
2 fu-l: Constant deformation and constant contact force?
I can do 4J.

, its -L, the slope 31 of the cam grate 18 and the hook portion 2
Because there is a 0[ri-livi boost effect song between 6 and 6, there is a
), there is also an advantage that the gauging force (117t) can be small on the Lb axis.

By the way, in the above description, the cam plate 18 is assumed to be one ring root-shaped piece, but as shown in Fig. 9, four cam plates 18-1, 18-2゜18-3 .1
It may be divided into 8-4. In FIG. 9, each of the four cam grates has a plurality of slots 32,
The claws 21 provided on the cover plate 17 engage through these slots 32 to guide linear movement as shown by arrows 33. Adjacent cam grates face each other at oblique sides at both ends in the movable direction 33.

This ensures that these cam plates 18-1, 18-2, 18-3, 18-4 can only be moved simultaneously.

Further, each of these cam plates is provided with projecting portions 19 at a plurality of locations. The projecting portion 19 has a slope 31 at one end. and).

The plurality of rib portions 26 of the rib plate 22 are aligned with the ↑[ of the projecting portion 19.
It is positioned so as to face one-to-one the end portion provided with 31.

Now, use a tool etc. to engage the cam plate 1 into the hole 28.
When 8-1.18-2.18-3.18-4 is moved in the direction of arrow 33, the protruding portion 19 is inserted below the hook portion 26 due to the wedge action of the slope 31. In this way, it is possible to obtain the same effect as the previous embodiment.

18.18-1.18-2゜18-3
．． Without using 18-4, as shown in Figure 10,
By moving the protrusions 23 and the guide body one by one in the direction shown by the arrow 34 and fitting the hook plate 22, the no-unong 11 and the cup 9-plate 17 are attached to the hook plate 2.
2 may be inserted directly.

As explained below using the L embodiment, according to the present invention, the generation of force couples in the housing is prevented as much as possible by the simple structure, and a constant contact force is always maintained between L and the contact. It is possible to provide a pressing contact type LSI socket in which the cover can be easily attached.

[Brief Description of the Drawings] Figure 1 is a sectional view of an example of a conventional LSI chip in use; Figure 2 is a similar cross-section on the other side; ItJ:+, jJ origin '1mi action explanatory diagram,
FIG. 4 is a -F side view of an embodiment of the LSI socket according to the present invention when locked, FIG. 5 Q-L is also a side view, and FIG. 6
The support is also a bottom view, FIG. 7 is a sectional view of only the main parts of the same embodiment in use, FIG. 8 is a partially cutaway top view of the same embodiment before locking, and FIG. 9 is a top view of the same embodiment before locking. FIG. 10 is a diagram similar to FIG. 8 in the embodiment of the pond of the present invention, and FIG. 10 is a diagram similar to FIG. 7 in yet another embodiment 1c of the present invention. 3...LSI, 10...Printed circuit board, 11.
...No Unong, 12...Contact, 13...
・Contact part, 17...Cover plate, 18.18-1
．． 18-2゜18-3, 18-4...Cam plate, 19:...Protrusion, 22...Hook plate, 25...
・Engagement part, 26... Hook part, 27... Engagement groove, 3
1...Slope. Prefecture 5 map 10 map

Claims (1)

[Claims] 1- L having multiple rows of external connection plates around the L;
In the socket used for SI connection. An insulating housing for receiving the LSI, and a plurality of 11 '9's' integrated into the housing so as to contact the connection pads of the LSI received in the housing.
ttx contact), a cover plate overlaid on the opposite side of the LSI, and the housing and rtk
, the locking device is arranged around the periphery so as to sandwich the force and the cousolate, and the device facing the vaginal opening is opposite to the one receiving the LSI of the housing. 7. It has a resilient comb-like engaging part.
The tooth-shaped engaging portion id passes between the contact phases I7 of the outer row and its tip engages with the housing, and the tip of the tooth-shaped engaging portion id and the housing An LSI socket characterized in that an engagement point with the LSI is set at a position corresponding to a line of action of a resultant force of support reaction forces of the contact when the contact comes into contact with the LSI, or a position near the line of action. 2 - LS with multiple rows of external connection pads around it
In the socket used to connect I. An insulating ring that receives the above LSI, a plurality of rows of -S terminal contacts built through the housing so as to make contact with the connection and ξrad of the LSI received in the ring, and a Φ on the opposite side of the LSI. - a cover plate to be fitted together, and a locking device attached to the housing; the locking device includes a hook portion facing the -h bar f rate and a surface of the housing opposite to the surface that receives the LSI; a hook plate integrally having a resilient comb-shaped retaining portion facing the camsolate; and a camsolate that is slidably superimposed on the cover plate and inserted and removed between the cover plate and the flap portion. Accordingly, the result is 7
The tooth-shaped engaging portion passes between the contact phases of the outer row so that its tip engages with the housing, and the optical path of the tooth-shaped engaging portion and the... The point of engagement with the contact is set at or near the line of action of the resultant force of the support portion 7J of the contact when the contact comes into contact with the LSI. An LSI socket characterized by: