JP2000100536A - Socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a socket capable of being further reduced in height. SOLUTION: This socket 1 is used to connect multiple terminals 81 of an electronic component 8 to a printed board 9, and it is provided with a cover 3, an insulator 4, a first contact 5 and a second contact 6. The insulator 4 can be reciprocated between a first position and a second position moved to the right side from the first position. A contact section 62 is located between each terminal 81 and a contact section 52, it is practically kept in no contact with the terminal when the insulator 4 is located at the first position, and it is kept in pressure contact with the terminal 81 when the insulator 4 is located at the second position. A contact section 63 is located between the terminal 81 and the contact section 52, it is faced to the contact section 52 when the insulator 4 is located at the first position, and it is kept in pressure contact with the contact section 52 when the insulator 4 is located at the second position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a socket,
In particular, LSI (Large Scale Integrated circuit), M
PU (Micro Processing Unit) or MCM (Magn
The present invention relates to a socket for electrically connecting an electronic component having a plurality of terminals such as an etic core memory) to a printed circuit board.

[0002]

2. Description of the Related Art A socket used for an electronic component such as an LSI, for example, an LSI socket generally includes a housing fixed on a mounting surface of a printed circuit board or the like, a socket portion for receiving terminals of the electronic component, and the like. Have been. Also,
In an electronic component having a large number of terminals such as an LSI, the terminals are easily deformed or damaged by an excessive force applied at the time of insertion and removal. Therefore, in the prior art, a socket having a structure for preventing deformation or breakage of the terminal by reducing the force applied to the terminal at the time of insertion / removal, that is, ZIF (Zero
Insertion Force) type and LIF (Low Insertion Force)
) Type sockets have been proposed.

In this type of conventional socket, for example, a socket contact is provided in a housing so as to be swingable, and at the same time, it holds an electronic component and slides in a predetermined direction on an upper surface of the housing and returns to a predetermined position. A slide cover is provided. Then, the terminal is inserted into the socket contact with substantially no insertion force, and after the insertion, the slide cover is slid on the housing. As a result, the socket contact swings, the socket portion of the socket contact is pressed against the terminal of the electronic component, and the socket contact is electrically connected to the terminal of the electronic component.

[0004]

With the increase in the speed of signals used in the electronic components, there is a demand for a socket of this type to reduce an inductance component that hinders the increase in speed. In addition, with the miniaturization of various electronic devices and the like using the electronic components, the electronic components also need to be miniaturized. In order to reduce such an inductance component and reduce the size, it is desired to reduce the height of the socket.

Here, in order to reduce the height of the socket, the socket contact may be shortened. In this case, the operating force required to slide the slide cover increases by shortening the socket contact, but the operating force can be reduced by shortening the socket portion of the socket contact. However, since the socket portion needs to have a structure for receiving the terminal of the electronic component, there is a limit to shortening the socket portion. For this reason, it was difficult to sufficiently reduce the height of the conventional socket.

Accordingly, an object of the present invention is to provide a socket which does not have the above-mentioned problems and can further reduce the height.

[0007]

A socket according to the present invention is a socket for electrically connecting an electronic component having a plurality of terminals to a printed circuit board. The socket includes a cover, an insulator, and a plurality of first contacts. And a plurality of second contacts, wherein the cover holds the electronic component on an upper surface thereof and is fixed at a predetermined position on a mounting surface of the printed circuit board, and the insulator, the first contacts, and The insulator is arranged on the mounting surface such that the insulator can reciprocate between a first position and a second position in a predetermined direction parallel to the mounting surface. Wherein each of the first contacts has a connection portion at one end thereof and a first contact portion at the other end thereof, and wherein the connection portion is a portion connected to the printed circuit board. Wherein the first contact portion is a portion facing the terminal of the electronic component held on the cover in the predetermined direction, and each of the second contacts has a fixed portion at one end thereof. The other end has second and third contact portions, the fixing portion is a portion fixed to the insulator, and the second contact portion is held on the cover. The insulator is located between the terminal of the electronic component and the first contact portion and is substantially in non-contact with the terminal when the insulator is at the first position. The terminal is in pressure contact with the terminal when in the position.
The contact portion is provided between the terminal of the electronic component held on the cover and the first contact portion, and the insulator is provided on the fixed portion side of the second contact portion. When the insulator is at the first position, it faces the first contact portion in the predetermined direction, and when the insulator is at the second position, the insulator comes into pressure contact with the first contact portion. And

[0008] Preferably, the insulator has a support portion for supporting the fixing portion above the mounting surface. Preferably, the plurality of first contacts are obtained by pressing a metal plate. Further preferably, a hook portion is connected to the second contact portion, and the hook portion is hooked on an upper end portion of the first contact, whereby the insulator is connected to the second contact portion via the second contact. Hanged on one contact.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the socket according to the present invention will be described below in detail with reference to the accompanying drawings. 1 to 5
Referring to FIG. 1, the socket 1 of the present embodiment includes a cover 3, an insulator 4, a plurality of first contacts 5, a plurality of second contacts 6, and the like. here,
The electronic component 8 has a plurality of terminals 81. Further, the printed circuit board 9 is a connection portion (solder portion) of the first contact 5.
51 is connected by soldering with solder 10.
The socket 1 is used to connect a plurality of terminals 81 provided on the electronic component 8 to the printed circuit board 9 via the first contacts 5 and the second contacts 6.

An electronic component 8 is held on the upper surface of the cover 3, that is, on the upper side in FIG. Also, cover 3
Is fixed at a predetermined position on the mounting surface 91 of the printed circuit board 9, and covers the insulator 4, the first contact 5, and the second contact 6. Inside the cover 3, a concave portion 31 in which the upper portion of the first contact 5 and the second contact 6 and the terminal 81 are accommodated is formed. Further, the terminal 81 is provided on the cover 3 with the concave portion 31.
An insertion hole 32 for insertion into the inside is formed. In addition, a support portion 33 for supporting the first contact 5 is formed below the cover. Further, a boss 34 is formed on the lower surface of the cover 3. This boss part 34
Are positioning holes (not shown) formed in the printed circuit board 9
The cover 3 is fixed at a predetermined position on the printed circuit board 9 by fitting into the inside.

The insulator 4 is mounted on the mounting surface so that it can reciprocate between a first position (position shown in FIG. 1) and a second position (position shown in FIG. 2) in a predetermined direction parallel to the mounting surface 91. It is arranged on a substrate 91 and is made of an insulating material such as a synthetic resin. Partition walls 41 are formed at a predetermined pitch in the insulator 4, and a housing space 42 is formed between the adjacent partition walls 41.
Three. The lower portion of the first contact 5 and the second contact 6 that pass through the insertion hole 43 is accommodated in the accommodation space 42. Further, the insulator 4 has a support portion 44 that supports a fixing portion 61 provided at a lower end portion of the second contact 6 immediately above the mounting surface 91.

The first contact 5 is formed in a predetermined shape by, for example, pressing a conductive metal plate. In particular, referring to FIG. 3, a connection portion 51 is provided at one end, and a first contact portion 52 is provided at the other end. Further, the contact portion 51 and the first contact portion 52 are connected by a connecting portion 53. The connection section 51 is connected to the printed circuit board 9. The first contact portion 52 is in contact with the terminal 81 of the electronic component 8 held on the cover 3 in a predetermined direction (FIG. 1).
(In the left-right direction in (a)).

The second contact 6 is formed by forming a conductive metal plate into a predetermined shape by pressing or the like, like the first contact 5. Referring to FIG. 4 in particular, a fixing portion 61 is provided at one end and a second contact portion 6 is provided at the other end.
It has the 2nd and 3rd contact part 63, respectively. Furthermore,
The fixed portion 61 and the second and third contact portions 62 and 63 are connected by a lever portion 65.

The fixing portion 61 is fixed to the support portion 44 of the insulator 4 as described above. This fixing is performed, for example, by press-fitting the fixing portion 61 into a slot formed in the support portion 44. Alternatively, when the insulator 4 is formed by injection molding or the like, a method of fixing the fixing portion 61 by molding the fixing portion 61 into the support portion 44 may be used.

The second contact portion 62 is located between the terminal 81 of the electronic component 8 held on the cover 3 and the first contact portion 52. When the insulator 4 is at the first position, the second contact portion 62 is substantially in a non-contact state with the terminal 81, that is, in a non-contact state or in a slight contact state. When the insulator 4 moves to the right from the first position and is at the second position,
Due to the elastic deformation of the second contact 6 accompanying the movement of the insulator 4, the second contact portion 62 comes into a state of being pressed against the terminal 81. Further, the second contact portion 62 has a hook 6
4 are connected in series. Then, by hooking the hook portion 64 on the upper end of the first contact 5, the insulator 4 is connected to the first contact 5 via the second contact 6.
In a state of being suspended.

The third contact portion 63 is provided continuously on the fixed portion 61 side of the second contact portion 62, and is connected to the terminal 81 of the electronic component 8 held on the cover 3 and the first contact portion. 52. When the insulator 4 is at the first position, the insulator 4 faces the first contact portion 52 in a predetermined direction, that is, in the left-right direction in FIG. Also,
When the insulator 4 is at the second position, the insulator 4 is pressed against the first contact portion 52.

The socket 1 of the present embodiment having the above-described configuration.
Then, as shown in FIG. 1, the terminal 81 of the electronic component 8 held on the cover 3 is inserted into the insertion hole 32 in a substantially non-contact state with the second contact portion 62 and the third contact portion 63. Through. Next, the position of the insulator 4 is moved to the right from the first position shown in FIG. 1 to the second position shown in FIG.

At the second position, the movement of the point C of the second contact 6 with the movement of the insulator 4 causes the point C to be a force point, the point B to be a fulcrum, and the point A to be a point of action, and a leverage principle to be used. The second contact portion 62 comes into pressure contact with the terminal 81 at the point A, and the third contact portion 63 comes into pressure contact with the first contact portion 52 of the first contact 5 at the point B. As a result, the terminal 8 of the electronic component 8 is connected via the second contact 6.
1 and the first contact 5 conduct.

When the electronic component 8 is to be removed from the socket 1, the reverse procedure is taken. That is, the insulator 4 is moved from the state shown in FIG. 2 where the insulator 4 is at the second position to the first position shown in FIG. And
In this state where the terminal 81 and the second contact portion 62 and the third contact portion 63 are substantially in non-contact, the terminal 81 of the electronic component 8 is removed from the socket 1.

Here, in the state of FIG. 1, points A and B
If the length between the points B and C is 1 (L), the length between the points B and C is L, the contact force acting on the point A is p, and the driving force acting on the point C is P, P: p = 1: L, p / P = L / l, and the greater the p / P, the smaller the driving force when operating and moving the insulator 4. Therefore, the driving force decreases as L is longer than 1 (that is, as the leverage magnification increases). For this reason, the insulator 4 may have a small strength.

In the state shown in FIG. 2, a part of the contact force applied to the first contact 5 is distributed to the cover 3 via the supporting portion 33 which is in contact with the first contact 5. For this reason, the force applied to the connection portion 51 of the first contact 5 is reduced because the cover 3 has a force for escaping at the time of connection, and the stress applied to the soldered portion of the connection portion 51 and the printed circuit board 9 by the solder 10 is reduced. Is done.

In the socket 1 of the present embodiment configured as described above, in order to connect the terminals 81 of the electronic component 8,
The structure may be such that the second contact portion 62 and the third contact portion 63 of the second contact 6 are located between the terminal 81 and the first contact 5. It is not necessary to have a shape that accepts terminals. For this reason,
In the socket 1 of the present embodiment, the distance between the second contact portion 62 and the third contact portion 63 of the second contact 6 can be made sufficiently short, and accordingly, the third contact portion 63 The length between the and the fixing portion 61 can be sufficiently reduced. As a result, the height of the socket can be sufficiently reduced.

The socket 1 of this embodiment is manufactured, for example, as follows. First, a plurality of first contacts 5
Is produced at the contact pitch of the socket 1 by press working. Next, the plurality of first contacts 5 are soldered to the printed circuit board 9 by reflow or the like while being attached to the supporting carrier, and then the carrier is broken off. Then, the second contact 6 molded into the insulator 4 is formed.
Is attached as shown in FIG. 1 and the cover 3 is attached.
Then, the boss 34 of the cover 3 is inserted into the positioning hole formed in the printed circuit board 9. As a result, Sonnet 1
Is fixed to the printed circuit board 9.

[0024]

As described above, according to the socket of the present invention, it is possible to provide a socket whose height can be further reduced.

[Brief description of the drawings]

FIG. 1A is a sectional view of a main part showing a state in which electronic components are mounted (unconnected) in a socket according to an embodiment of the present invention, and FIG. It is a top view of the principal part of the socket in the state where the electronic component was removed.

FIG. 2 is a sectional view of a main part showing a connection state in the socket shown in FIG. 1;

3A and 3B show a first contact of the socket shown in FIG. 1, wherein FIG. 3A is a front view, FIG. 3B is a plan view, and FIG. 3C is a side view.

4 shows a second contact of the socket shown in FIG. 1, (a) is a front view, (b) is a plan view, and (c) is a side view.

5 shows an overall image of the socket shown in FIG. 1, (a) is a plan view, (b) is a front view, and (c) is a side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket 3 Cover 4 Insulator 44 Support part 5 First contact 51 Connection part 52 First contact part 6 Second contact 61 Fixed part 62 Second contact part 63 Third contact part 64 Hook part 8 Electronic component 81 Terminal 9 Printed circuit board 91 Mounting surface

Claims (4)

[Claims] A socket (1) for electrically connecting an electronic component (8) having a plurality of terminals (81) to a printed circuit board (9), comprising a cover (3) and an insulator (4). And a plurality of first
Contact (5) and a plurality of second contacts (6)
The cover (3) holds the electronic component (8) on an upper surface thereof and mounts the printed circuit board (9) on the mounting surface (9).
1) fixed at a predetermined position on the upper surface, and configured to cover the insulator (4), the first contact (5), and the second contact (6); The first contact (5) is disposed on the mounting surface (91) so as to be able to reciprocate between a first position and a second position in a predetermined direction parallel to the surface (91). ) Has a connecting portion (51) at one end thereof and a first contact portion (52) at the other end thereof. The connecting portion (51) is connected to the printed circuit board (9). The first contact portion (52) is a portion facing the terminal (81) of the electronic component (8) held on the cover (3) in the predetermined direction; Each second contact (6) has a fixing part (61) at one end thereof, The second contact portion (62) has a second and a third contact portion (62, 63), the fixing portion (61) is a portion fixed to the insulator (4), and the second contact portion (62). ) Is the terminal (81) of the electronic component (8) held on the cover (3) and the first (81).
And when the insulator (4) is in the first position, the insulator (4) is substantially in non-contact with the terminal (81), and the insulator (4) is When in the second position, the terminal (81) is pressed against the terminal (81), and the third contact portion (63) is in contact with the second contact portion (6).
2) The terminal (8) of the electronic component (8), which is connected to the fixed portion (61) side and held on the cover (3).
1) between the first contact portion (52) and the first contact portion (52) in the predetermined direction when the insulator (4) is at the first position, A socket characterized in that the insulator (4) is pressed against the first contact portion (52) when the insulator (4) is in the second position. 2. The insulator (4) according to claim 1, wherein the insulator (4) has a support part (44) for supporting the fixing part (61) above the mounting surface (91). socket. 3. The plurality of first contacts (5),
3. The socket according to claim 1, wherein the socket is obtained by pressing a metal plate. 4. A hook portion (64) is connected to the second contact portion (62), and the hook portion (64) is hooked on an upper end portion of the first contact (5) to thereby form the insulator. 4. The method according to claim 1, wherein (4) is suspended from the first contact (5) via the second contact (6). The described socket.