JPH0878120A - Receptacle connector - Google Patents

Abstract

PURPOSE: To provide a socket connector capable of sufficiently reducing insertion force. CONSTITUTION: A pin grid array socket connector for being connected to a plurality of pins 11, 12 within a CPU chip 10 has a plurality of socket contacts, and socket contacts have a pair of contact arms 23, 24, 25, 26 respectively. Each arm has contact points 30, 31, 32, 33 adjacent to its free end, the contact points 30, 31, 32, 33 of each contact are zigzag arranged so that during using, specific pins 11, 12 of the CPU chip 10 do not come in contact with the contact points 30, 31, 32, 33 of the related contact at the same time in the beginning. Adjacent contacts are zigzag arranged so that during using, the related pair of the pins 11, 12 of the CPU chip 10 do not come in contact with contact points more than one at the same time at the beginning.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION This invention relates to electrical connection devices and more particularly but not exclusively, a pin grid used to connect to a central processing unit (CPU), which typically has 144 or more pins. Arrays (hereinafter referred to as "PGA" using common industry acronyms).

[0002]

2. Description of the Related Art A connector having a large number of pins, for example,
In the PGA connector used to connect the CPU chip, a large force is applied when inserting the pin into the socket, which makes engagement difficult and causes damage. The number of such pins tends to increase, for example the 586 chip has over 200 pins.

[0003]

By the way, studies have been conducted to reduce the insertion force into the PGA socket, for example, the socket contacts are arranged in two staggered rows. This can reduce the insertion force by about 50% compared to non-staggered socket contacts. Another approach was made with respect to the socket contact design, where the pin does not initiate contact with both contact arms at the same time, which reduces insertion force. However, such other methods have not been successful in properly reducing the insertion force. The present invention solves this problem.

[0004]

It is an object of the present invention to provide a socket connector that solves the above problems.

[0005]

SUMMARY OF THE INVENTION A socket connector according to the present invention has a plurality of socket contacts for engagement by a plurality of pins, each socket contact having a pair of contact arms, and each arm having a respective contact arm. The contact points of the contacts are staggered so that in use, a particular pin does not initially contact both contacts of the associated contact at the same time, and adjacent contacts are A socket connector for connecting a plurality of pins, the shape of which provides that the associated pairs of adjacent pins are staggered relative to each other so that they do not initially contact more than one contact point at the same time Is.

The staggered arrangement of contact points is preferably made between the first pin of the adjacent pair of first contacts and one contact point of the contacts associated with the first pin, and A contact is made between the second pin of an adjacent pair and one contact point of the contact associated with the second pin.

A third contact is preferably made between the contact points of the first pin and the contact associated with the first pin, and other contacts associated with the second pin and the second pin. There is preferably a fourth contact between the contact points.

The arm of each contact preferably has an end extending from the contact point to the free end, the end of the pin being provided to facilitate entry of the pin into the associated contact. It is located diagonally to the direction of movement.

Each contact has a base and the arms of the contact extend from the base in a cantilever fashion. Each contact is made from sheet material. Each base of the contact is in the same plane and different contact point spacings from the base surface are achieved by the length of the contact's arms.

[0010]

Embodiment An embodiment of a socket connector according to the present invention will be described.
An example will be described with reference to the accompanying drawings.

The CPU chip is shown at 10, and only the small portion where the two pins 11, 12 extend is shown. As mentioned above, CPU chips are generally more than 144, and more refined chips have more than 200 pins,
It has a large number of pins.

A portion of the pin grid array (PGA) socket is shown at 13. The socket 13 has a main large portion 14 having contact concave portions 15 and 16 and pin engaging holes 17 and 18. Here, the number of contact recesses and the number of engaging holes correspond to the number of pins in the CPU chip.

As is apparent from the drawings, the contact recesses 15 and 16 are of different depths. The contact recess 16 is deeper than the contact recess 15. Contact recesses 15 and 16 have contacts 19 and 20, respectively. Here, the number of contacts corresponds to the number of pins to the CPU chip. The contacts 19 and 20 have pins 21 and 22. However, other forms of electrical connection may be used.

Not only are the contact recesses 15 and 16 of different depths, but each recess has a ceiling of two heights. This allows the contact 19 to have contact arms 23, 24 and 25, 26 of different lengths.
And will be able to accommodate 20.

The contact arms 23 and 24 are made of bent metal stamped from a sheet (although other ways of making contacts are possible) and are also formed with contact points 30, 31 respectively. Similarly, contact arms 25 and 26 of contact 16 are formed with contact points 32 and 33, respectively. These contact points 30, 31, 32 and 33 are located at different distances from the upper pin engagement surface 35 of the body portion 14.

The shape of the contacts and the arrangement of the contact points 30, 31, 32 and 33 are such that the pin 12 first contacts the contact point 32 of the contact 20 when the CPU chip descends and engages in the socket 13. It will be like this. When the CPU chip further moves down, the pin 11 comes into contact with the contact point 30 of the contact 19. When the CPU chip further descends, the pin 12 comes into contact with the contact point 33 of the contact 20, and finally the pin 11 comes into contact with the contact point 31 of the contact 19. In this way, the force of inserting the CPU chip into the socket 13 is the force required when all the contact points are at the same height, the maximum force required to initially engage the pin with the contact points. About 1 /
Reduced to 4.

The contact sequence may differ between the pin of the CPU chip and the contact point on the contact arm. Furthermore, the invention is not limited to the engagement of pin grid arrays on CPU chips, and in fact the invention applies in all cases where insertion force is a problem in the engagement of a multi-pin male connector in a socket. can do.

The different contact point positions are
This can be achieved not only by changing the length of the contact arm, but by arranging similar contacts at different positions with respect to the pin engaging surface.

Various modifications and changes can be made to the above embodiments, the embodiments are merely examples, and the scope of the present invention is determined by the appended claims.

[0020]

According to the present invention, the insertion force can be sufficiently reduced.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of adjacent contact pairs in a contact array.

[Explanation of symbols]

 10 CPU chip 11, 12 pin 15, 16 contact recess 17, 18 pin engaging hole 19, 20 contact 23, 24, 25, 26 contact arm

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Martin Kok Sung Wong Singapore, Bukit Buttok Street, Block 213 No. 06-215 (72) Inventor Kok Hong Singapore, Toa Payoror Long 2, Block 99 See No. 05- 19

Claims (7)

[Claims] 1. A socket connector for connecting a plurality of pins, wherein the socket connector has a plurality of socket contacts for engaging with the plurality of pins, each socket contact having a pair of contact arms, and The arm has a contact point adjacent to its free end, and the contact point of each contact is staggered so that in use, a particular pin may not initially contact both contacts of the associated contact at the same time. And the adjacent contacts are staggered with respect to each other such that, in use, the associated pair of adjacent pins do not initially contact more than one contact point at the same time in use. . 2. A staggered arrangement of contact points,
A first contact is made between the first pin of the adjacent pair and one contact point of the contact associated with the first pin, and a next contact is made to the second pin and the second pin of the adjacent pair. The method of claim 1, wherein the related contact is made between one contact point and the contact point.
The described socket connector. 3. A third contact is made between the first pin and the other contact point of the contact associated with the first pin, and the other contact associated with the second pin and the second pin. 4th between contact points of
The socket connector according to claim 2, wherein the socket connector is provided. 4. The socket connector according to claim 1, wherein the arm of each contact has an end portion extending from the contact point to the free end, and the end portion is positioned obliquely in the movement direction of the pin. 5. The socket connector of claim 1, wherein each contact has a base and the arms of the contacts extend from the base in a cantilever fashion. 6. The bases of the contacts are in the same plane,
The socket connector of claim 5, wherein different contact point spacings from the base are achieved by the length of the contact arms. 7. The socket connector of claim 1, wherein each contact is made of sheet material.