JPH08273784A - Socket for electrical component - Google Patents

Abstract

PURPOSE: To improve the reliability of an electrical connection to an electrical component by using an easy-to-change and thin contact film. CONSTITUTION: A contact film 22 having one end for contact with an electrical component 36 is laid on a socket body 1, and this body 1 is provided with a contact pin 26 for connection to a circuit board. In addition, the contact fin 26 is resiliently kept in contact with the other end of the film 22 in such a state as capable of parting therefrom. The electrical component 36 and the contact pin 26 are thereby electrically connected to each other via the film 22.

Description

Detailed Description of the Invention

[0001]

The present invention relates to an IC chip, a multi-chip,
The present invention relates to an electric component socket used for electrically connecting an electric component such as a chip module to a circuit board.

[0002]

2. Description of the Related Art Conventionally, when an electric component is connected to a circuit board for testing, the electric component is mounted on the circuit board so that the component can be easily replaced, or heat generated during soldering is applied to an internal circuit. 2. Description of the Related Art Sockets for electric parts are used in consideration of cases such as mounting of electric parts that may have an adverse effect on a circuit board. As this socket for electrical parts, generally, as shown in Japanese Utility Model Publication No. 62-58879, a socket cover is provided with a large number of pressing pieces,
The socket body is provided with connection terminals for connecting to the circuit of the circuit board, and in use, the electric parts are arranged so that their lead terminals are placed on the connection terminals on the socket body, and thereafter, in the socket cover. There is one in which a lead terminal of an electric component is pressed against a connection terminal on a socket body by a pressing piece to ensure electrical connection.

By the way, in recent years, in response to demands such as narrowing the interval between terminals such as leads or pads arranged along the edge of an electric component and not wanting to damage the terminals of the electric component, the electric component A contact film has been developed between the terminal and the circuit board. In this structure, a plurality of conductive parts are provided on the surface of the contact film, and one end of each conductive part serves as a contact part of a terminal of an electric component, while the other end of each conductive part has a connection terminal. Are fixed to form a connection portion for the circuit on the circuit board. With this, when one end of the conductive part is brought into contact with the terminal of the electric component in a biased state and the connection terminal at the other end of the conductive part is connected (soldered) to the circuit of the circuit board, The electrical connection with the electric component will be secured.

[0004]

However, in the above-mentioned socket for electric parts, the contact film is thin and flexible because one end of the conductive part is brought into contact with the terminal of the electric part while being biased. Therefore, the durability of the contact film is inevitably low. In particular, when the socket is used for testing an electric component, the electric component is replaced each time the test is performed, so that the durability of the contact film has to be greatly reduced as the number of replacements increases. Therefore, in such a case, it is necessary to replace the contact film, but even if the contact film is replaced, the connection terminal and the circuit of the circuit board are connected (soldered) at the other end of the contact film. Replacing the film is not easy.

Therefore, it is an object of the present invention to provide a socket for electric parts, in which the contact film can be easily replaced and the reliability of electric connection with electric parts can be improved by using a thin contact film.

[0006]

In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that a contact film, which is in contact with an electric component at one end, is provided on the socket body, and the other contact film is provided. In the socket for electric parts, to which the connection terminal for connecting to the circuit of the circuit board is connected to the end portion, the connection terminal is provided on the socket body, and the connection terminal is relative to the other end portion of the contact film. It is characterized in that it is elastically contacted so that it can be contacted and separated.

According to a second aspect of the invention, in the socket for electric parts according to the first aspect, the connection terminal is provided with a protrusion.

According to a third aspect of the present invention, in the electrical component socket according to the first or second aspect, a positioning pin is provided on either the contact film or the socket body, and the contact film or the socket body is provided. On the other side, a positioning hole into which the positioning pin is fitted is provided.

According to a fourth aspect of the present invention, in the electrical component socket according to any one of the first to third aspects, the contact film is sized to occupy a part of a circumferential direction of the socket body. It is characterized by

According to a fifth aspect of the present invention, in the electrical component socket according to any one of the first to fourth aspects, in the contact film, the pitch width of the conductive portions at the other end is equal to the pitch of the conductive portions at the one end. It is characterized in that it is set to expand in comparison with the width.

According to a sixth aspect of the present invention, in the socket for electrical parts according to any one of the first to fifth aspects, the socket for electrical parts is for testing.

[0012]

In the socket for electric parts according to the first aspect of the present invention, since the connection terminal is elastically contacted with the other end of the contact film on the socket body so that it can be contacted and separated, the contact between the connection terminal and the socket body is made. The other end of the film is clamped, the other end of the contact film is fixed on the socket body, and the electrical connection between the connection terminal and the other end of the contact film is secured. Through this, electrical connection between the electric component and the circuit of the circuit board becomes possible. On the other hand, if the connection terminal is displaced in the direction away from the other end of the contact film against the biasing force, the pinching between the connection terminal and the socket body is released, and the connection terminal is connected to the circuit of the circuit board. However, the contact film can be taken out from between the connection terminal and the socket body, and the contact film can be easily replaced. Therefore, since a thin contact film can be used, the reliability of the electrical connection with the terminal of the electric component can be improved.

Moreover, when the contact film is replaced, only the contact film is replaced and the connection terminals are not replaced. Therefore, when replacing the contact film, it is possible to reduce the number of discarded parts as much as possible.

In the socket for electric parts according to the second aspect of the present invention, since the connection terminal is provided with the protrusion, the protrusion is used as a lever to resist the urging force of the connection terminal. Since the connection terminal can be displaced in the direction away from the socket body, the contact film can be replaced more easily.

In the electrical component socket of the present invention, a positioning pin is provided on either one of the contact film and the socket body, and a positioning hole into which the positioning pin is fitted is provided on the other of the contact film and the socket body. Therefore, when replacing the contact film, a new contact film can be reliably and easily positioned at a predetermined position on the socket body.

In the socket for electric parts according to the present invention, since the contact film has a size occupying a part of the socket body in the circumferential direction, a plurality of contact films should be arranged on the socket body. Therefore, when replacing the contact film, it is sufficient to replace only the corresponding contact film, and it is not necessary to replace all of the contact film on the socket body.

In the socket for electric parts according to the present invention, the contact film is set so that the pitch width of the conductive portion at the other end is wider than the pitch width of the conductive portion at the one end. When the connection terminals are provided on the socket body, even if the conductive portion at one end of the contact film has a narrow pitch, the interval between the connection terminals can be widened without being restricted by the narrow pitch. It is possible to improve the strength, insulation performance, etc. of each connecting terminal mounting portion.

Since the socket for electric parts according to claim 6 is for testing electric parts, the electric parts are replaced each time the test is performed, and the durability of the contact film is greatly reduced as the number of replacements increases. As a result, the need for contact film replacement increases, but the action of any one of claims 1 to 5 described above occurs, and the high need for contact film replacement can be sufficiently dealt with.

[0019]

Embodiments of the present invention will now be described in detail with reference to the drawings.

First, referring to FIG. 1, reference numeral 1 denotes a socket body according to the present embodiment. The socket body 1 is formed in a rectangular shape with an insulating material such as plastic, and a rectangular central hole 2 is formed in the center thereof. The peripheral edge of the central hole 2 is formed to be parallel to the outer edge of the socket body 1.

As shown in FIGS. 1 and 7, on the upper surface of the socket body 1, a first upper surface 3, a second upper surface 4, and a third upper surface 5 are arranged in this order from the central hole 2 toward the outer edge of the socket body 1. Are formed. The first upper surface 3 is a surface at a position lower than both the first and second upper surfaces 4 and 5, and the second upper surface 4 is a surface at a position higher than both the first and third upper surfaces 3 and 5. The third upper surface 5 is lower than the second upper surface 4, and the first upper surface 3
It is considered to be a surface at a higher position than. Thereby, the first step surface 6 is formed between the first upper surface 3 and the second upper surface 4,
A second step surface 7 is to be formed between the second upper surface 4 and the third upper surface 5. The first to third upper surfaces 3 to 5
Is a flat surface having a predetermined width, and the first upper surface 3
Is formed along the periphery of the rectangular center hole 2,
The upper surface 4 is formed along the first upper surface 3, and the third upper surface 5 is formed.
Are formed along the second upper surface 4.

As shown in FIG. 1, guide members 8 are erected on the first upper surface 3 at corners at the four corners of the first step surface 6, respectively. Each of the guide members 8 extends above the second upper surface 4, and each of the guide members 8 includes a pair of guide portions 9 that form a right angle along the corner portion of the first step surface 6.

On the first upper surface 3, as shown in FIGS. 1 and 6, four linear pressing spring fixing blocks 1 are provided.
A combination of 0s is arranged over the entire circumference of the rectangular shape of the first upper surface 3. Each pressure spring fixing block 10
Has outer corners abutting on the guide portions 9 of the respective guide members 8, and the pressing spring fixing block 1 by the guide portions 9 is
With the regulation of 0, the outward displacement of the pressing spring fixing block 10 is regulated. In this case, the end portions of the adjacent pressing spring fixing blocks 10 overlap each other, but since the entire upper surface of the pressing spring fixing block 10 is flush, as shown in FIG. A fitting groove 11 is formed at an end of one of the pressing spring fixing blocks 10, and the other pressing spring fixing block 10 is formed in the fitting groove 11.
The ends of are fitted.

Further, locking pieces 12 are erected from both end surfaces of each pressure spring fixing block 10, whereby the locking pieces 12 are raised.
At each corner of the first step surface 6, locking pieces 12 are arranged on both sides of the guide member 8, respectively.
Are projected above the second upper surface 4 along the first step surface 6. In this case, each locking piece 12 has a socket body 1
A recess 13 is formed behind the locking piece 12 on the first step surface 6 so as to swing slightly outward.

Furthermore, each pressure spring fixing block 10 is provided.
A plurality of ribs 14 are provided on the upper surface of the so as to extend in the width direction of the pressing spring fixing block 10, and grooves 15 are formed between the ribs 14. On the bottom surface 16 of the groove 15, a curved surface portion 16a that extends downward in a curved shape on the first step surface 6 side, and an inclined portion 16b that inclines downward in the central portion as the distance from the curved surface portion 16a increases. However, horizontal portions 16c that extend horizontally are formed on the opposite side of the first step surface 6, respectively. Further, on the back side of the bottom surface 16, a horizontally formed lower surface 17 is formed. Then, the pressing springs 18 are fitted in the grooves 15 from the curved surface portion 16a side with the bottom surface 16 and the lower surface 17 sandwiched therebetween. The pressure springs 18 are
It is curved in a U-shape so as to substantially follow the curved shape of the curved surface portion 16a. An engagement protrusion 19 is provided so as to protrude downward on the lower end side as one end side of the pressing spring 18, and the engagement protrusion 19 is engaged with an engagement groove 20 on the first upper surface 3. . As a result, each pressure spring fixing block 10 has the first
It is supposed to be fixed to the upper surface 3. On the other hand, at the tip on the upper end side as the other end side of the pressing spring 18, a pressing portion 21 is provided so as to project upward so as to project above the rib 14. When the pressing portion 21 receives a pressure from above, the pressing portion 18 can move downward mainly due to elastic deformation of the U-shaped portion of the pressing spring 18. However, since the horizontal portion 16c of the bottom surface is provided below the pressing portion 21 with a space, the pressing portion 21 is positionally restricted in the downward direction by the horizontal portion 16c, and the pressing portion 21 receives pressure from the upper direction. Even if it moves downward, the upper end of the pressing portion 21 is always located above the rib 14.

As shown in FIG. 2, contact films 22 are provided on the second upper surface 4 between adjacent corner portions. This contact film 22
Is a conductive part (pattern) 23 formed on the upper surface of an insulating film having a thickness of, for example, about 25 to 50 μm.
As shown in FIG. 5, on one end side of the contact film 22, the conductive portions 23 are arranged with a pitch width corresponding to the terminal pitch of the electrical components mounted in the socket,
The pitch width L is enlarged from one end (upper end in FIG. 5) toward the other end (lower end in FIG. 5).

One end of the contact film 22 is placed on the pressing portions 21 of the plurality of pressing springs 18, and the other end of the contact film 22 is placed on the second upper surface 4. In this case, a pair of positioning pins 24 are erected on the second upper surface 4 between the corners, and correspondingly, positioning holes 25 are formed in the contact film 22. The contact film 22 is positioned by fitting the positioning pin 24.

As shown in FIGS. 1 to 3 and 7, the third upper surface 5 is provided with a plurality of contact pins 26 as connecting terminals between the corner portions. Each contact pin 26 has a contact portion 27 that comes into contact with the conductive portion 23 at the other end of the contact film 22, a lead portion 28 that is connected to a circuit (not shown) on the circuit board, and a bending portion 29 that has a spring property. The bending portion 29 includes a connecting portion 30 that connects the bending portion 29 and the lead portion 28, and a protruding portion 31 provided in the bending portion 29 in the vicinity of the contact portion 27. The lead portion 28 is soldered by reflow on the conductor pattern formed on the mounting surface of the circuit board. The curved portion 29 is continuous with the contact portion 27 and has a generally U-shape that opens upward as a whole. The connecting portion 30 is supposed to extend horizontally from the bending portion 29 and then bend downward.
0 has a substantially U-shape that opens downward in cooperation with the connecting portion of the curved portion 29, and the connecting portion 30 is provided with a claw 32 on the inner surface of the downwardly bent portion. The protruding portion 31 extends in a lever shape obliquely upward on the side opposite to the contact portion 27.

As shown in FIGS. 1, 2 and 7, a plurality of contact pin holding holes 33 are formed in a row between the corners on the third upper surface 5, and are formed on the outer surface of the socket body 1. The notch 34 is formed. The curved portion 29 of the contact pin 26 is inserted into the contact pin holding hole 33 so that the contact portion 27 faces the second upper surface 4 side, and is provided in a portion between the contact pin holding hole 33 and the outer surface of the socket body 1. The portion from the curved portion 29 to the connecting portion 30 is to be fitted, and the claw 32 is to be locked in the notch 34 at this time. Thereby, the bending portion 29
The contact portion 27 is elastically contacted with the other end portion of the contact film 22 so as to be able to come into contact with and separate from the other end portion of the contact film 22 due to the elasticity due to the expansion and contraction. In the present embodiment, the contact portion 27
In order to ensure the expansion / contraction movement of the socket, a protrusion 35 is projected downward in the lower portion of the curved portion 29 near the connecting portion 30, and only the protrusion 35 is deeper than the contact pin holding hole 33. It is fitted to the main body 1.

In this embodiment, a tab IC 36 attached to an IC carrier 37 is mounted on the IC socket body 1 as shown in FIGS. 2 and 7 to 9. The tab IC 36 has an integrated circuit element mounted on a film on which lead terminals are formed. Also, IC
The carrier 37 is usually made of synthetic resin or the like.
This is for protecting an electric component such as a C package or a tab IC by attaching the electric component when carrying or testing. Then, after the transportation and the test are finished, the electric parts are removed.

When mounting the tab IC 36,
The tab IC 36 is lowered from above the socket body 1 (see FIG. 7), as shown in FIGS.
After the outer peripheral edge portion of 7 bends the locking piece 12 outward (see FIG.
(See FIG. 9). As a result, the tab IC 36 is located at a predetermined position on the socket body 1, and the tab I
The lead terminal of C36 comes into contact individually with the plurality of conductive portions 23 at one end of the contact film 22. At this time, the conductive portion 23 at one end of the contact film 22 is surely brought into contact with the lead terminal of the tab IC 36 by an urging force of the pressing spring 18 with an appropriate pressing force.

In the electrical component socket having the above-described structure, the contact portion 27 of the contact pin 26 can be contacted with and separated from the conductive portion 23 at the other end of the contact film 22 on the socket body 1. Since the other end portion of the contact film 22 is sandwiched between the contact portion 27 of the contact pin 26 and the socket body 1, since the other end portion of the contact film 22 is urged toward the other end portion, While being fixed on the socket body 1, the electrical connection between the contact pin 26 and the other end of the contact film 22 is secured, and the electrical connection between the tab IC 36 and the circuit of the circuit board is normally performed through the socket. It will be possible.

On the other hand, the contact pin 26 is attached to the contact film 22 against the biasing force of the contact pin 26.
When the contact pin 26 is displaced in the direction away from the other end, the pinching between the contact pin 26 and the socket body 1 is released, and even if the contact pin 26 is soldered to the circuit of the circuit board, the contact portion of the contact pin 26 The contact film 22 can be taken out between the socket 27 and the socket body 1. This makes it possible to easily replace the contact film 22 when using the thin contact film 22.

Moreover, when the contact film 22 is replaced, only the contact film 22 is replaced and the contact pins 26 are not replaced. Therefore, when replacing the contact film 22, the number of discarded parts can be minimized.

Further, the contact pin 26 has a protrusion 3
1, the protrusion 31 is used as a lever to displace the contact portion 27 of the contact pin 26 in the direction away from the socket body 1 against the biasing force of the contact pin 26. Therefore, the contact film 22 can be replaced more easily.

Further, the positioning pin 2 is attached to the socket body 1.
4 is provided, and the contact film 22 is provided with a positioning hole 25 into which the positioning pin 24 is fitted. Therefore, when replacing the contact film 22, a new contact film 22 can be reliably and easily placed at a predetermined position on the socket body 1. It can be positioned.

Furthermore, in this case, since the contact film 22 which comes into contact with the tab IC 36 is divided into four for each corner portion of the socket body 1, only the contact film 22 is replaced when the contact film 22 is replaced. It is sufficient to replace it, and it is not necessary to replace all the contact films 22 on the socket body 1. Of course, in some cases, the contact film 22 may be divided into four or more parts, or conversely, the contact film 22 may be integrally formed.

Furthermore, since the pitch width L of the conductive portion 23 on the contact film 22 increases from one end of the contact film 22 toward the other end thereof, when the contact pin 26 is provided on the socket body 1,
Even if the pitch width L of the conductive portion 23 at one end of the contact film 22 is narrow, the distance between the contact pins 26 can be set wide without being restricted by the pitch width L, and the attachment of the contact pins 26 can be facilitated. It is possible to improve the strength of the mounting portion of each contact pin 26, the insulation performance, and the like.

In addition, since the tab IC 36 is used for testing, the electrical parts are replaced each time the test is performed, and as the number of replacements increases, the durability of the contact film 22 decreases significantly, and the contact film 2
Although the necessity of exchanging the second contact film 22 becomes high, the above-mentioned contents can sufficiently cope with the high necessity of exchanging the contact film 22.

Although the preferred embodiment of the present invention has been described above, the present invention is not limited to this, and instead of the pressing spring 18, for example, one in which microspheres are embedded in silicon rubber or the like is used. It includes modifications such as In addition, the present invention is an IC module, a multi-chip
It can be applied to a socket for electrical connection with various electric parts such as a module.

Further, the pressing spring 1 provided in the socket body 1
8 or by arranging the microspheres embedded in the silicon rubber or the like at a fine interval and preparing a plurality of contact films 22 having different conductive portion 23 pitches, the pitch of the lead terminals can be changed by exchanging the contact films 22. Different tab ICs can be used.

As is apparent from the above description, according to the present invention, the contact film can be easily replaced, and therefore a thin contact film can be used. It is possible to provide a socket for electric parts with high reliability of dynamic connection.

[Brief description of drawings]

FIG. 1 is a perspective view of an electric component socket according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state after the tab IC is assembled in the socket of FIG.

FIG. 3 is a side view of a contact pin that is a connection terminal.

FIG. 4 is a side view of a pressing spring.

FIG. 5 is a plan view of a contact film.

FIG. 6 is an explanatory diagram for explaining the assembling of the pressing spring fixing block.

FIG. 7 is an explanatory diagram showing a first step of mounting the tab IC in the socket.

FIG. 8 is an explanatory diagram showing a second step of mounting the tab IC in the socket.

FIG. 9 is an explanatory diagram showing a third step of mounting the tab IC in the socket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Socket body 22 Contact film 23 Conductive part 24 Positioning pin 25 Positioning hole 26 Contact pin 27 Contact part 28 Lead part 31 Projection part 36 Tab IC

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication H01R 23/68 6901-5B H01R 23/68 D

Claims (6)

[Claims] 1. An electric device in which a contact film, which is in contact with an electric component at one end, is provided on a socket body, and a connection terminal for connecting to a circuit of a circuit board is connected to the other end of the contact film. In the component socket, the connection terminal is provided on the socket body, and the connection terminal is elastically contacted with the other end of the contact film so as to be contactable and separable. 2. The socket for electrical parts according to claim 1, wherein the connection terminal is provided with a protrusion. 3. A positioning pin is provided on one of the contact film and the socket body, and a positioning hole into which the positioning pin is fitted is provided on the other of the contact film and the socket body. The socket for electric parts according to claim 1 or 2. 4. The socket for electrical parts according to claim 1, wherein the contact film is sized to occupy a part of the socket body in a circumferential direction. 5. The contact film is set so that the pitch width of the conductive portion at the other end portion is larger than the pitch width of the conductive portion at the one end portion. The socket for electrical parts according to any one of 1. 6. The socket for electric parts according to claim 1, wherein the socket is for testing the electric parts.