JP4922221B2 - Connector and contact unit used for connector - Google Patents

Description

  The present invention electrically connects terminals of two objects so that a plurality of terminals provided in an IC package such as a CPU used in a computer are electrically connected to a plurality of terminals provided on a printed circuit board. The present invention relates to a connector to be connected and a contact unit used for this connector.

2. Description of the Related Art In recent years, electronic products have been miniaturized, and the wiring density of mounted printed boards and elements in the electronic product have been increased. For this reason, miniaturization of each element has progressed, and there is a demand for how to miniaturize a connector in a limited space in an electronic component so as to have a multi-core number and a narrow pitch.
Generally, a method using conductive particles or solder as a connection medium or a method using a connector is known in order to fix and electrically connect components.

Patent Document 1 below proposes an IC socket having a contact for connecting an IC and a printed circuit board and capable of reducing the pitch with a low inductance.
Specifically, the IC socket electrically connects the first device side electrode that contacts the IC, the first substrate side electrode that contacts the printed circuit board, the first device side electrode, and the first substrate side electrode. And a first transmission line to be connected to each other, and an insulating first elastic body provided between the first device-side electrode and the first substrate-side electrode.
Accordingly, it is possible to provide an IC socket capable of reducing the pitch with low inductance.

JP 2003-185700 A

However, in the IC socket described in Patent Document 1, the contact reliability is not always stably obtained. In some cases, the electrodes (connection terminals) of the IC and the printed circuit board and the electrodes (connection terminals) on the IC socket side are used. Inadequate contact with the battery, and in the worst case, electrical connection may not be made.
This occurs when foreign matters such as fibers and fine particles are sandwiched between the electrodes (connection terminals) of the IC and the printed circuit board and the electrodes of the IC socket, thereby reducing the contact area between the electrodes. That is, the IC socket has a low local deformation capability of the first device-side electrode and the first substrate-side electrode, that is, the surface of the contact portion is rigid, so that the connection terminal contacts the IC socket. When a foreign object is sandwiched between the parts, a part of the electrode to be contacted by the foreign object is lifted and the contact area is reduced, and in the worst case, a disconnected state is established. For this reason, the IC socket has a problem that a stable electrical connection cannot always be made.

  Therefore, in order to solve the above-described problems, the present invention uses a miniaturized, narrow-pitch connector to electrically connect between connection terminals of a connection object (a portion to be contacted with a connection terminal ( It is an object of the present invention to provide a connector that realizes stable contact of terminals on the contact side) and a contact unit using this connector.

The present invention is a contact unit of a connector that comes into contact with opposing connection terminals of two connection objects and electrically connects the two connection objects, and is deformed by a pressure received when connecting to the connection object. An elastic body that is arranged with the end portions on both sides of the elastic member facing the connection terminals of the connection object, the end portions on both sides, and the end portions on both sides of the elastic body. An insulating film provided on the elastic body so as to cover the connecting surface, and two terminals are formed in a region corresponding to the both end portions on the insulating film, and the two terminals are connected to each other. A conductive layer that forms a connection line on the insulating film, and at least one of the two terminals on the insulating film protrudes toward the elastic body. Insulating fill And the conductor layer have a portion that is shaping a concave shape, the pressure applied when connecting the connection object to generate a force extending outwardly around a portion that is shaping a concave shape, Provided is a connector contact unit characterized in that foreign matters interposed between connection terminals of connection objects are excluded to the outside or confined in a concavely shaped portion .

At this time, the elastic body has two planes facing each other connected by the end portions on both sides, and the end portions on both sides are respectively directed from one plane to the other plane of the two planes. It is preferable that the portion extending in an inclined manner and processed into the concave shape is formed so as to protrude toward the end portion where the elastic body is inclined.
Further, the insulating film is formed so as to cover the other plane and the ends on both sides, and the ends on both sides are each connected to the other plane by forming an arcuate curved surface. It is preferable.
Moreover, it is preferable that the recessed part is provided in the edge part of the said both sides of the said elastic body so as to correspond to the said recessed shape of the said insulating film and the said conductor layer.
Furthermore, the elastic body has a long shape, and the connection line is formed so as to extend in a direction substantially orthogonal to the longitudinal direction of the long shape. A plurality of sets are provided at a predetermined interval in the longitudinal direction as a set of one terminal, the connection line is formed for each of the plurality of sets, and the concave portion extends in the longitudinal direction. It is preferable that each terminal is provided.

  Furthermore, the present invention is a connector for electrically connecting two opposing connection terminals of an object to be connected, wherein the plurality of contact units and a plurality of slit holes for mounting the plurality of contact units are provided. There is provided a connector comprising: a frame provided on both sides of the elastic body of the contact unit and mounted so as to protrude from different sides of the slit hole.

  In the contact unit of the present invention, at least one of the two terminals located on both sides of the elastic body is formed into a concave shape when viewed from the connection terminal to be contacted so as to protrude toward the elastic body. . This concave shape creates an irregular shape on the surface of the terminal on the contact unit side that tries to contact the connection terminal, so that when the contact terminal is pressed against the connection terminal, the terminal on the contact unit side is outside the surface of the connection terminal. Generates a force along the surface direction facing For this reason, even if there is a foreign substance in the connection terminal, the foreign substance is excluded to the outside. Therefore, unlike the conventional case, a part of the terminal to be contacted by the foreign matter is not lifted and the contact area is not reduced, and stable contact of the part to be contacted with the connection terminal can be ensured.

Hereinafter, the contact unit used for the connector and connector of this invention is demonstrated in detail using attached drawing.
FIG. 1 is a diagram showing a case where the connector 10 of the present invention is disposed between an IC package 12 and a printed circuit board 14 to electrically connect the IC package 12 and the printed circuit board 14. A heat sink 16 is provided on the IC package 12.

  As shown in FIG. 2, the connector 10 is configured by mounting and fixing a contact unit 20 described later in each of a plurality of slit holes provided in a frame 18 formed of an insulating member such as resin. ing. Two side end portions that are located on both sides of the contact unit 20 (in FIG. 2, above and below the contact unit 20) and that form terminals that contact the connection terminals of the IC package 12 and the printed circuit board 14 are slit holes. The contact unit 20 is mounted so as to protrude to different sides.

On the other hand, the frame 18, corresponding to the dimensions of the IC package 12, the concave portion to be fitted is provided an IC Pakeji 12. By fitting the IC Pakeji 12 in the recess, the IC package 12 is positioned at a predetermined position by the positioning, the connection terminals of the IC package 12 is set at a predetermined position. Thus, the connection terminals of the IC package 12 come into contact with the respective terminals of the contact unit 20 mounted on the frame 18.
The printed circuit board 14 is provided with connection terminals for wiring lines (not shown). The printed circuit board 14 is fixed to a predetermined position on the printed circuit board by screw holes provided at four corners of the frame 18 to be attached to the frame 18. Each terminal of the contact unit 20 is positioned so that each terminal of the contact unit 20 contacts each of the connection terminals on the printed circuit board 14.

  The heat sink 16 has a function of releasing heat generated in the IC package 12. The heat sink 16 sandwiches the IC package 12 between the connector 10 and is arranged at predetermined fixing positions on the printed circuit board 14, and screw holes provided at the four corners of the heat sink 16 and screws provided at the four corners of the frame 18. It fixes to the predetermined position on the printed circuit board 14 using the male screw which penetrated the hole. As a result, the side end portion made of the elastic body of the connector 10 is pressed by the connection terminal of the printed circuit board and the connection terminal of the IC package 12, and the terminal of the contact unit 20 is brought into contact with the connection terminal by this pressing and is electrically Connected to.

3A and 3B are diagrams showing the contact unit 20 in detail.
As shown in FIG. 3A, the contact unit 20 is a long unit with the A direction as the longitudinal direction. The contact unit 20 includes an elastic body 22, an insulating film 24, and a conductor layer 26.

  The elastic body 22 is a base material that defines the shape of the contact unit 20, and is formed of an elastic member having a long shape extending in the A direction. For example, it is composed of a member using a silicon-based heat-resistant rubber or gel material. As shown in FIG. 3A, the elastic body 22 is formed on the surface of the side end portions 22c and 22d (see FIG. 3B) connecting the opposing flat surfaces 22a and 22b (see FIG. 3B). Notches 28 are provided at regular intervals along the direction. As will be described later, the terminals of the contact unit 20 that come into contact with the connection terminals of the IC package 12 and the printed board 14 are arranged in the A direction. The elastic body 22 that supports the terminals at this time is compressed. This is to prevent the deformation in the A direction of the elastic body 22 caused by this from affecting the adjacent terminals. In the present invention, the notch 28 is not always necessary and may be omitted.

  The elastic body 22 has a metal body 22e extending in the A direction as a skeleton material therein. Further, the elastic body 22 is provided with projecting portions 22f and 22g for mounting the contact unit 20 on the frame 18, and the projecting portions 22f and 22g are attached so as to be fitted into recesses (not shown) of the frame 18.

As shown in FIG. 3B, the elastic body 22 has two opposing surfaces 22a and 22b and side end portions 22c and 22d that connect the surfaces, The surfaces of the portions 22c and 22d form an arcuate curved surface having a certain curvature from the surface 22b and extend toward the surface 22a, while being inclined from the surface 22a toward the surface 22b at a certain inclination angle. It extends to.
In the vicinity of the central portion of the surfaces of the side end portions 22c and 22d, a concave portion 22h is formed as seen from the connection terminal side of the IC package 12 or the printed circuit board 14, and extends as a groove in the A direction. The concave portion 22h is formed in accordance with the shape of the concave portion 30 at a position corresponding to the concave portion 30 formed into the shape of the insulating film 24 and the conductor layer 26 described later. This point will be described later.

As the insulating film 24, for example, an insulating film using a polyimide resin or an aramid resin is used, and is cut out in accordance with the cutout portion 28 of the elastic body 22, as shown in FIG.
The insulating film 24 is bonded to the elastic body 22 using an adhesive or a coupling material. Alternatively, the insulating film 24 may be bonded to the elastic body 22 by heat welding.
The conductor layer 26 includes a terminal 26a and a connection line 26b. The terminal 26 a is formed in a region corresponding to the side end portion of the elastic body 22, and the connection line 26 b is formed in a region corresponding to the surface 22 b of the elastic body 22. The terminals 26 a and the connection lines 26 b are provided at regular intervals in the A direction between the cutout portions of the insulating film 24 cutout corresponding to the cutout portions 28. The conductor layer 26 including the terminals 26a and the connection lines 26b is produced by patterning a metal thin film on the insulating film 24, for example. Patterning can produce a thin film with a thickness of several μm using a known process such as sputtering, plating, coating, or etching. In this case, since the connection lines 26b can be arranged at intervals of 0.5 mm or less, the pitch can be reduced.

  A terminal 26 a formed on the insulating film 24 and the conductor layer 26 corresponding to the side end of the elastic body 22 protrudes toward the side end of the elastic body 22, and the IC package 12 and the printed circuit board 14. A recessed portion 30 is provided which is recessed when viewed from the connection terminal side. This point will be described later.

  Such a contact unit 20 is sandwiched between the IC package 12 and the printed board 14 and is pressed by a predetermined pressure received when connecting, so that the elastic body 22 is deformed. FIG. 4 is a diagram illustrating a state in which the terminal 26 a of the contact unit 20 is electrically connected to the connection terminal of the IC package 12 and the printed board 14. The elastic body 22 of the contact unit 20 is pressed in the vertical direction in FIG. For example, the contact portion of the contact unit 20 with the connection terminal receives a pressure of several tens (g weight) and receives a compressive strain of about 30%.

FIG. 5A is a schematic diagram in which the vicinity of the side end portion 22c of the contact unit 20 is enlarged. FIG. 5A shows the side end 22c, but the side end 22d has the same configuration.
Near the center of the side end 22c of the contact unit 20, there is provided a recess 30 extending in the A direction (perpendicular to the plane of FIG. 5A), and the recess 22h is formed in the elastic body 22 so as to correspond to this. Is provided. Further, the insulating film 24 and the conductor layer 26 are formed with a recess 30 that is shaped so as to protrude toward the elastic body 22. The recess 22 h is provided so as to correspond to the position of the recess 30. Recess 30, by performing embossing or the like for the insulating film 24 provided with the conductive layer 26, is shaping a concave shape. The recess 22h may be formed at the same time as the elastic body 22 is molded, or may be formed by laser processing or the like as a groove extending in the A direction with respect to the formed elastic body 22.
When the depth D of the concave portion 30 is defined as a straight line L in contact with the conductor layer 26 at the side end portion 22, and expressed by a length along the vertical direction in the figure from the straight line L to the lowest point of the concave portion 30 The depth D is preferably 0.1 to 0.3 mm. When the depth D is in the above range, foreign matters can be efficiently removed as will be described later.

  By providing the contact unit 20 with the concave portion 30, as shown in FIG. 5A, the surface that contacts the connection terminal 12a forms irregularities. For this reason, when the contact unit 20 comes into contact with the connection terminal 12a and is further pressed and the elastic body 22 is compressed, the conductor layer 26 is illustrated as shown by the arrow in FIG. A force is generated against the connection terminal in such a direction as to spread outward in the right and left sides. For this reason, as shown in FIG.5 (c), the foreign material 32 on the connection terminal 12a moves so that it may exclude outside. For example, a foreign substance located on the left side with respect to the recess 30 is excluded on the left side, and a foreign substance located on the right side is excluded on the right side. On the other hand, as shown in FIG. 5 (d), the foreign material 32 at a position facing the concave portion 30 is covered and confined by the conductor layer 26 around the region of the concave portion 30.

  In this way, no matter where the foreign matter 32 is located on the connection terminal 12a, the foreign matter 32 is excluded outside the portion in contact with the connection terminal 12a or confined in the region of the recess 30. Further, it is less likely that the contact area of the conductor layer 26 is lifted by the foreign matter 32 and the contact area is reduced. Therefore, when the connection terminals of the connection objects such as the IC package 12 and the printed board 14 are electrically connected, stable contact of the terminal 26a to be in contact with the connection terminal is realized.

The contact unit 20 described above has a configuration in which a concave portion 22h is provided in the elastic body 22 in accordance with the shape of the concave portion 30 protruding to the elastic body 22 side of the conductor layer 26 and the insulating film 24, and this portion is joined. . However, in the present invention, in addition to this configuration, a contact unit 20 as shown in FIG. Specifically, the contact unit 20 is configured without providing a recess corresponding to the recess 30 in the elastic body 22. That is, the bent apex of the protruding portion of the recess 30 of the terminal of the contact unit 20 connected to the connection terminal contacts the side end of the elastic body 22, but the other portion of the terminal is between the elastic body 22. This is a configuration in which a space is formed. In this case, the insulating film 24 positioned on the side end surface of the elastic body 22 is bonded at a portion that comes into contact with the elastic body 22, but is not bonded at the periphery thereof, and in the region of the surface 22b of the elastic body 22, The insulating film 24 and the elastic body 22 are joined. Note that the contact portion of the concave portion 30 with the elastic body 22 may not be joined.
When the contact unit 20 having the configuration shown in FIG. 6A is pressed against the connection terminal 12a as shown in FIG. 6B, the conductor layer 26 and the insulating film 24 are recessed with respect to the connection terminal. Since a force is generated in the direction in which 30 expands (toward the outside), the foreign matter 32 on the connection terminal 12a is excluded to the outside. Similarly, the foreign matter 32 at a position facing the concave portion 30 is covered and confined so as to be wrapped by the conductor layer 26 around the region of the concave portion 30 as in FIG.

  For this reason, unlike the conventional case, the contact area of the conductor layer is not lifted by the foreign matter 32 to reduce the contact area. Therefore, when the connection terminals of the connection objects such as the IC package 12 and the printed circuit board 14 are electrically connected, stable contact of the conductor layer 26 with the terminal to be in contact with the connection terminal is realized.

  In the present invention, the insulating film and the conductor layer corresponding to the terminal are subjected to shape processing so as to form a recess, but the number of such recesses is not limited to one. A plurality of recesses may be provided in one terminal to be in contact with the connection terminal. By providing at least one recess in each terminal of the contact unit, the conductor layer 26 can be deformed so as to exclude the foreign matter from the portion to be contacted even if the foreign matter is in the connection terminal.

  As mentioned above, although the contact unit used for the connector and connector of this invention was demonstrated in detail, this invention is not limited to the said embodiment, Even if it is variously improved and changed in the range which does not deviate from the main point of this invention. Of course it is good.

It is a figure explaining the usage method of the connector of this invention. It is a figure explaining the contact unit used for the connector of this invention. (A), (b) is a schematic block diagram of one Embodiment of the contact unit of this invention. It is a figure which shows the state in which the contact unit of this invention is integrated. (A)-(d) is a figure explaining the effect | action of one Embodiment of the contact unit of this invention. (A), (b) is a figure explaining the effect | action of other embodiment of the contact unit of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Connector 12 IC package 14 Printed circuit board 16 Heat sink 18 Frame 20 Contact unit 22 Elastic body 22a, 22b Surface 22c, 22d End 22e Metal body 22f, 22g Protrusion 22h Recess 24 Insulating film 26 Conductive film 26a Terminal 26b Connection line 28 Notch 30 Recess

Claims (6)

A contact unit of a connector that contacts two connection objects facing each other and electrically connects the two connection objects,
An elastic body that is configured by an elastic member that is deformed by pressure received when connecting to a connection object, and that ends of both sides of the elastic member are arranged toward the connection terminal of the connection object;
An insulating film provided on the elastic body so as to cover the end portions on both sides and the surface connecting the end portions on both sides of the elastic body;
A conductor layer that forms two terminals in a region corresponding to the end portions on both sides of the insulating film and forms a connection line on the insulating film so as to connect the two terminals; ,
Furthermore, at least one of the two terminals on the insulating film has a portion in which the insulating film and the conductor layer are formed into a concave shape so as to protrude toward the elastic body. And generating a force that spreads outward around the portion that is shaped into the concave shape due to the pressure received when connecting to the connection object, and foreign matter interposed between the connection terminals of the connection object A contact unit for a connector, characterized in that it is excluded to the outside or confined in a portion that is shaped into the concave shape . The elastic body has two planes facing each other connected by the end portions on both sides,
The end portions on both sides extend from one plane of the two planes to the other plane, respectively.
The contact unit according to claim 1, wherein the portion processed into the concave shape is formed so as to protrude toward the inclined end portion of the elastic body. The insulating film is formed so as to cover the other plane and the ends on both sides,
The contact unit according to claim 2, wherein the ends on both sides are each connected to the other plane by forming an arcuate curved surface. The ends of the opposite sides of the elastic body, so as to correspond to the concave shape of the insulating film and the conductor layer, in any one of claims 1 to 3 where the recessed groove is provided Contact unit described. The elastic body has an elongated shape, and the connection line is formed so as to extend in a direction substantially orthogonal to the longitudinal direction of the elongated shape,
In the insulating film, the two terminals as a set, a plurality of sets are provided at regular intervals in the longitudinal direction, and the connection lines are formed for each of the plurality of sets,
The contact unit according to any one of claims 1 to 4, wherein the concave portion is provided in each terminal so as to extend in the longitudinal direction. A connector for electrically connecting between opposing connection terminals of two connection objects,
A plurality of contact units according to any one of claims 1 to 5 ,
A plurality of slit holes for mounting the plurality of contact units, and a frame that is mounted so that end portions on both sides of the elastic body of the contact unit protrude on different sides of the slit holes; A connector comprising:

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