JPH11258311A - Contact device, conductive pin used for it and guide socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a contact device which can deal with printed-circuit boards, to be inspected, with the different positional relationship between an interconnection and a terminal and/or an electrode while a part of a member is replaced, which can prevent a facility for inspection from being increased and which can reduce inspection costs. SOLUTION: In installation pin board 4 is attached to a base 1, provided with connectors 3, so as to be levitated. End parts on the side of the base 1 of conductive pins 6 on the installation pin board 4 are connected to the connectors 3. In addition, a replacement pin board 8 is attached to the base 1 so as to be freely detachable. Respective conductive pins 9 are connected to end parts of the respective conductive pins 6 on the installation pin board 4. The end part on the opposite side of the base 1 of the replacement pin board 8 is used as a contact part with respective contact parts of a printed-circuit board to be inspected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a contact device,
For example, the present invention relates to a contact device for electrically connecting a printed circuit board or the like to a test circuit or the like, and a conductive pin and a guide socket used for the contact device.

[0002]

2. Description of the Related Art Electronic circuits using ICs, transistors, and other electronic components are used very widely in various devices and equipment, and their applications are steadily expanding.
These electronic circuits are usually configured using a printed circuit board on which a wiring film is printed on one or both sides, and ICs, transistors and other various electronic components are mounted on the printed circuit board and necessary soldering is performed. Thus, an electronic circuit is configured.

[0003] Many of the devices and equipment using electronic circuits are required to be reduced in size, to have higher functions, and to have higher performance. As a result, the circuit configuration of electronic circuits is required to be more complicated and higher integration is required. ing. Therefore, the wiring of the printed circuit board is also miniaturized,
There is a trend towards higher integration, which is becoming more difficult and more important to inspect. Because the wiring is thick,
If the number is small, short-circuit failure is unlikely to occur, but short-circuit failure is more likely to occur as wiring becomes finer and more highly integrated, and it becomes more difficult to find it.

FIG. 5 is a perspective view showing a conventional example of a contact device used for inspection of a printed circuit board. In the figure, 1
Is a plate-shaped base made of resin such as bakelite,
Reference numeral 2 denotes a connector mounting plate having one end fixed to one end of the base 1, on which a number of connectors 3, 3,... Are mounted. Each of the connectors 3, 3,... Is mounted so that the respective printed circuit board insertion ports (not shown) face the front side of the base 1 and the terminals face the back side of the base 1.

[0005] Reference numeral 4 denotes a pin board provided on the back surface of the base 1 by supporting columns 5, 5, 5, 5 as appropriate. A large number of conductive pins 6, 6, ... are provided.
The ends on the base side of 6,... Are covered wires 7, 7,.
Are electrically connected to the terminals of the connectors 3, 3,... The ends of the conductive pins 6, 6,... On the side opposite to the base are appropriately protruded from the surface of the pin board 4 on the side opposite to the base. Alternatively, they are arranged corresponding to the electrodes.

[0006] When the printed circuit board to be inspected is positioned and applied to the pin board 4 and an appropriate pressure is applied,
Each of the wirings, terminals, and / or electrodes of the printed circuit board to be inspected and corresponding ones of the conductive pins 6, 6,. The test measurement circuit formed by the test printed circuit board inserted into the test board and the test target printed circuit board are electrically connected via the contact device. Then, the inspection is performed under the state.

There are various types of printed circuit board patterns to be inspected. In the past, a contact device was made for each of different printed circuit board patterns and used as a contact device dedicated to the printed circuit board.

[0008]

By the way, there are various problems in preparing different contact devices for each type of printed circuit board because the pattern of the printed circuit board differs for each model. First, the contact device is originally expensive, and in particular, when the number of terminals and the like increase with the increase in the degree of integration and complexity of the printed circuit board, the number of conductive pins is large. As the number of covered electric wires connecting between them becomes higher, the price becomes higher. Therefore, preparing such an expensive electric wire for each model has a problem that an increase in equipment is caused.

Secondly, preparing contact devices for each model wastes the use of factories and warehouses by contact devices.
This causes a problem that the use efficiency is reduced. Naturally, these cause an increase in the inspection cost, and in turn, increase the price of the printed circuit board and products using the same, for example, various electronic devices, and cannot be overlooked.

The present invention has been made to solve such a problem, and is at least a part of the wiring, the terminal, and / or the electrode of the contacted body having a large number of wirings, terminals, and / or electrodes. In a contact device having a number of conductive pins corresponding to each part to be contacted and electrically leading the part to be contacted to the outside,
It is possible to cope with a contacted body having a different positional relationship between the wiring, the terminal and / or the electrode by exchanging a part of the member, thereby preventing an increase in inspection equipment and reducing the inspection cost. In addition, the shape of the end of the conductive pin in contact with that of the conductive pin can be changed according to the material of the wiring, terminal, and / or electrode of the contacted body without replacement with a new conductive pin. Another object of the present invention is to make it possible to easily adjust a positional relationship with respect to a pin board which is required due to thermal expansion of a contacted body.

[0011]

According to a first aspect of the present invention, there is provided a contact device, wherein an installation pin board is floated on a part of a base to which a connector is attached, and an end on the back side of each conductive pin of the installation pin board is attached to the base. The replacement pin board is electrically connected to each terminal of the connector, and the replacement pin board is floated on a portion other than the mounting portion of the base connector and the mounting portion of the mounting pin board to be detachably mounted. The ends of the conductive pins attached to the board are electrically connected, and the ends of the conductive pins of the replacement pin board on the side opposite to the base are used as contact portions with the contact portions of the contacted body. Features.

Therefore, according to the contact device of the first aspect, when the contacted body is different, a portion to be contacted, which is at least a part of a wiring, a terminal, and / or an electrode of the new contacted body as an exchange pin board. If a member having a large number of conductive pins corresponding to the above is prepared and replaced with an old one, it is possible to make contact with a new contact body by using a portion other than the replacement pin board of the contact device as it is. Accordingly, it is possible to prevent the number of inspection facilities from increasing and to reduce the inspection cost.

According to a second aspect of the present invention, in the contact device of the first aspect, the conductive pins are detachably attached to the replacement pin board in such a manner that both ends are formed in different shapes with good contact at both ends. It is characterized by the following.

Therefore, according to the contact device of the second aspect, when the material is different even if the pattern of the wiring, the terminal and / or the electrode is the same, the shape of the portion in contact with the conductive pin is switched according to the material. be able to. That is, there are generally three types of shapes of ends of the conductive pins: needles, crowns, and triangular pyramids, of which two types, crowns and needles, are the mainstream. When the conductive pins are brought into contact with the wiring, terminals, and / or electrodes of the printed circuit board, the shape of the end of the conductive pin is preferably a crown depending on the material of the wiring or the like of the printed circuit board, particularly, the material of the surface plating. In some cases, needle-like is better in some cases. Therefore, if a conductive pin having one end formed in a crown shape and the other end formed in a needle shape is prepared, and this is detachably attached to the replacement pin board, the contacted body is provided. By attaching a conductive pin so that the end that is suitable for the above faces the opposite base side, it is possible to cope with a contacted body having wirings and the like of two different materials.

According to a third aspect of the present invention, in the contact device of the first or second aspect, the guide socket is rotatably housed around the center axis on the replacement pin board side, and the guide rod is fitted to the contacted body. A guide hole is formed to fit the guide pin in the guide socket into the guide hole, thereby positioning the contacted body with respect to the replacement pin board, and the guide rod is positioned at the center axis of the guide socket. It is characterized by having an eccentric structure fitted in a position shifted from the eccentric position.

Therefore, according to the third aspect of the present invention, the position of the guide rod can be changed by rotating the guide socket. Thus, the positional relationship of the contacted body with respect to the replacement pin board can be finely adjusted.

According to a fourth aspect of the present invention, the conductive pin is characterized in that both ends are formed in different types of contact shapes.

Therefore, according to the conductive pin of the fourth aspect, the contact device of the second aspect can be realized.

According to a fifth aspect of the present invention, the guide rod fitting hole into which the guide rod is fitted is formed such that its central axis is eccentric from its own central axis.

Therefore, according to the conductive pin of claim 5, the contact device of claim 3 can be realized.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The contact device of the present invention basically has a connector mounted on a part of a base, and a floating mounting board mounted on a part of the base other than the mounting portion of the connector. The base-side end of each conductive pin attached to the mounting pin board is electrically connected to each terminal of the connector, and a replacement pin board is attached to a portion other than the connector mounting portion of the base and the mounting pin board mounting portion. , And detachably attached, and electrically connect the base-side end of each conductive pin attached to the replacement pin board to the opposite base end of each conductive pin attached to the installation pin board. The end of the conductive pin of the replacement pin board on the side opposite to the base is a contact portion with each contact portion of the contacted body, and the connector is directly attached to the base. May Unishi but it may be performed via the attachment means of the connector mounting plate.

There are various modes for attaching the conductive pins to the installation pin board, and one end of the covered electric wire (the covered electric wire for connecting with the connector) is connected to the base end. End) can be connected by means such as soldering or crimping. One end of the covered wire (covered wire connecting between the conductive pins of the replacement pin board) can be connected to the opposite end by soldering or crimping. Any mode may be used as long as it can be connected by means.

There are various modes for attaching the conductive pins to the replacement pin board, and the end of the conductive pin on the base side is opposite to the side of the insulated wire connected to the conductive pins of the installation pin board. Can be detachably attached, and the end of the conductive pin opposite to the base protrudes from the surface opposite to the base of the replacement pin board as appropriate, and at least a part of the wiring, the terminal and / or the electrode of the printed circuit board. Any mode may be used as long as contact with a part to be contacted is possible.

In a further advanced aspect of the contact device of the present invention, there is an aspect in which conductive pins formed at different ends and having different shapes are detachably attached to the replacement pin board. .

In a further embodiment of the contact device of the present invention, the position of the contacted object with respect to the replacement pin board is determined by storing a guide socket in which a guide rod is slidably fitted on the replacement pin board side. A guide hole in which the guide rod is fitted is formed, and the guide rod in the guide socket is fitted in the guide hole, and the guide socket is centered with respect to the replacement pin board. There is also a mode in which the guide rod is housed so as to be rotatable about a shaft, and the guide rod is fitted at a position shifted from the center axis of the guide socket, that is, an eccentric structure. By doing so, by rotating the guide socket,
The position of the guide rod can be changed, and thus, the positional relationship of the contacted body with respect to the replacement pin board can be finely adjusted in response to subtle deformation due to thermal expansion of the contacted body.

Incidentally, if the number of the contact device of the present invention is one, it can contact only one side of the printed circuit board. Therefore, two contact devices of the present invention are provided for a printed circuit board that needs to make contact on both sides, one contact device is contacted to one surface of the printed circuit board, and the other contact device is connected to the other of the printed circuit board. Make contact with the surface.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments. FIG. 1 is an overall perspective view showing one embodiment of the contact device of the present invention. In the drawings, 1 is a plate-shaped base made of a resin such as bakelite, and 2 is a connector mounting plate having one end fixed to one end of the base 1.
It has a number of connectors 3, 3,... Each of the connectors 3, 3,... Is mounted so that the respective printed circuit board insertion ports (not shown) face the front side of the base 1 and the terminals face the back side of the base 1.

Reference numeral 4 denotes an installation pin board which is provided on the back surface of the base 1 by columns 5, 5, 5, 5 as appropriate, and is provided with a large number of conductive pins 6, 6,. , 6, ... on the base side are covered wires 7, 7, ...
Are electrically connected to the terminals of the connectors 3, 3,... Each of the conductive pins 6, 6,.
The insulated wire 10 for connecting between the end portion on the opposite side of the base and the conductive pins 9 of the replacement pin board 8;
Are connected to each other by, for example, crimping or soldering.

The replacement pin board 8 is supported by columns 11, 11 and support rods 12, 12. Prop 11, 11
Is fixed directly to the base 1, and the support bars 12, 12 are supported by guide bodies 13, 13 fixed on the base 1 so as to be movable in one side direction (direction of arrow a) of the exchange pin board 8. This is to make it possible to cope with a difference in the size of the replacement pin board 8.

The exchange pin board 8 has conductive pins 9, 9,
.. Are arranged at positions corresponding to a part to be contacted, which is at least a part of the wiring, the terminal and / or the electrode, on a printed circuit board (contact body) having a large number of wirings, terminals and / or electrodes. Each time a pattern such as a wiring of a printed circuit board to be inspected is different, an exchange pin board 8 corresponding to the pattern is prepared and used. The conductive pins 9, 9,...
, 0, 10,... Can be electrically connected so as to be detachable, and the end on the opposite side of the base can be elastically contacted with a portion to be contacted, such as a wiring of a printed circuit board to be inspected. Have been.

According to such a contact device, portions to be contacted with the conductive pins 9, 9,... Of the replacement pin board 8 of the printed circuit board to be inspected on the surface on the side opposite to the base of the replacement pin board 8. With the faces having
By positioning and pressing with an appropriate pressure, the portions to be contacted of the printed circuit board to be inspected are connected to the respective conductive pins 9, 9,.
0, 10,..., The covered electric wire 6 of the installation pin board 4,
.. And the covered electric wires 7, 7,... Are connected to the terminals of the connectors 3, 3,. It can be connected to a printed circuit board for inspection.

If the printed circuit board 8 to be inspected has portions to be contacted on both sides, two contact devices are prepared, one of which is a replacement pin board on one side of the printed circuit board to be inspected. The corresponding one 8 is attached to the other side of the printed circuit board to be inspected as the replacement pin board on the other side, and the two contact devices are used for the contacts on both sides of the inspected printed circuit board. Then, an inspection is performed.

When a large number of inspections have been completed for a certain type of inspected printed circuit board and a new type of inspected printed circuit board has to be inspected, a new replacement pin board corresponding to the inspected printed circuit board is required. 8
, And remove the old replacement pin board 8, and replace each conductive pin 9 of the replacement pin board 8 of the insulated wires 7, 7,... Connecting the replacement pin board 8 and the installation pin board 4. 9. Remove the end connected to. The ends of the covered electric wires 7, 7,... Are connected to the respective conductive pins 9, 9,.
And the new replacement pin board 8 is attached to the base 1 by the columns 11, 11 and the support rods 12, 12. As a result, the contact device becomes a new contact device for a printed circuit board to be inspected.
Therefore, it is possible to make contact with a new contact body by using the portion of the contact device other than the replacement pin board as it is. Accordingly, it is possible to prevent an increase in the number of inspection facilities and reduce the inspection cost.

FIGS. 2A to 2C show one specific example of the replacement pin board 8, and FIGS. 2A and 2B are cross-sectional views in which the directions of the conductive pins 9 are different from each other. , (C)
Is an exploded perspective view. The replacement pin board 8 is formed by laminating a plurality of plates 14a to 14f and removably disposing conductive pins 9a, 9a,. , 15, 15, ... are covered electric wires 10,
Are contact sockets provided at the ends of the conductive pins 9a, 9a,... The conductive pins 9a, 9a,... Differ from the conventional conductive pins in that both sides have a shape that can be a contact, and the shapes of the two-sided contacts are different.

That is, a conductive pin generally has a shape suitable for a contact at only one end of both ends, and there are several types of shapes, most of which are a crown type and a needle. Type, triangular pyramid type, especially crown type and needle type. The reason why there are a plurality of types is that a preferable contact shape differs depending on the material such as wiring of the printed circuit board to be inspected.

Therefore, in this embodiment, one conductive pin is formed with contacts having different shapes at both ends so as to be able to correspond to two types of printed circuit boards to be inspected having different wiring materials and the like. 2), the needle-shaped contact is brought into contact with the wiring on the printed circuit board to be inspected, or as shown in FIG. 2B, the contact in the shape of a crown is brought into contact with the wiring on the printed circuit board to be inspected. It is. In addition, the contact of each conductive pin 9a on the side of the printed circuit board to be inspected is in contact with the end face of the contact socket 15 at the end of the insulated wire 10,
Regardless of the shape of the contact, good contact can be made with the contact socket 15 without any problem.

FIGS. 3A to 3C are explanatory views of a specific example of a mechanism for positioning the printed circuit board to be inspected on the replacement pin board 8, and FIG. 3A is a perspective view showing a main part of the positioning mechanism.
(B) is a perspective view showing an eccentric guide socket and a guide rod used therein, and (C) is a perspective view showing a conventional guide socket and a guide rod. This positioning mechanism is characterized in that fine positioning can be performed when a fine displacement occurs due to a temperature change due to a difference in thermal expansion coefficient between the printed circuit board to be inspected and the replacement pin board 8.

That is, the replacement pin board 8 is provided with the conductive pins 9, 9,... So as to match each part to be contacted, such as the wiring of the inspected printed circuit board. When the inspection is performed, the printed circuit board to be inspected must be aligned with the replacement pin board 8 with extremely high accuracy. Otherwise, the portions to be contacted on the printed circuit board to be inspected cannot be reliably connected to the printed circuit boards for inspection. for that reason,
Alignment is important. The alignment is conventionally performed using a guide socket 16a and a guide rod 17 as shown in FIG. Specifically, a plurality of, for example, four guide socket insertion holes are provided in the replacement pin board 8, and guide sockets 16a, 16a, 16a,
On the other hand, the replacement pin board 8 is provided with a guide hole in which the guide rods 17, 17, 17, 17 are fitted, and the guide rods 17 fitted in the guide sockets 16a, 16a, 16a, 16a are provided. The printed circuit board to be inspected is positioned by applying it to the replacement pin board 8 such that the 17, 17, 17 are fitted into the guide holes of the printed circuit board to be inspected.

By the way, such a method has been conventionally acceptable, but the precision required for the positioning is increased with the increase in the integration degree of the printed circuit board. As a result, the displacement due to the thermal expansion of the printed circuit board cannot be ignored. is there. However, in the related art, it has not been possible to cope with a positional shift due to thermal expansion, and there has been a limit in improving the positioning accuracy. The inventor of the present application has developed a positioning mechanism that can fine-tune the position in response to a position shift due to thermal expansion. FIGS. 3A and 3B show this.

In the figure, reference numeral 18 denotes a printed circuit board to be inspected, and 19 a guide rod fitting hole.
Only 9 appear. Reference numeral 20 denotes a conductive pin storage hole provided in the replacement pin board 8;
Only 0 appears. The eccentric guide socket 16 shown in FIG. 3C is housed in the conductive pin housing hole 20.
The eccentric guide socket 16 has a guide rod housing hole 21 formed about an axis deviated from the central axis. That is,
The central axes of the guide socket 16 and the guide rod 17 stored therein are shifted, that is, eccentric. Therefore, when the guide socket 16 is rotated, the position of the guide bar 17 is changed to the X direction (horizontal direction) and the Y direction (vertical direction).
Changes to Therefore, when the printed circuit board 18 to be inspected is slightly displaced with respect to the replacement pin board 8 due to thermal expansion, the position of the inspected printed circuit board 18 is adjusted by rotating the eccentric guide socket 16 so that the displacement is eliminated. It becomes possible to do. Therefore, it is possible to cope with further miniaturization and higher integration of the printed circuit board.

FIG. 4 is a perspective view showing a modification of the contact device of the present invention, excluding an exchange pin board. The contact device is provided with respective coated electric wires 7, 7 for connecting the connectors 3, 3,... And the conductive pins 6, 6,.
Is provided with a cable holding plate 21 for holding ...
The insulated wires 7, 7,... Pass under the cable holding plate 21 and each of the conductive pins 6,
.. And the respective conductive pins 9, 9,.
.. pass through the cable holding plate 21. By doing so, the coated electric wires 7, 7,...
Are not entangled with the covered electric wires 10, 10,... 22, 2
Reference numerals 2,... Are columns for supporting the cable holding plate 21.

[0042]

According to the contact device of the first aspect, when the contacted body is different, a portion to be contacted, which is at least a part of a wiring, a terminal and / or an electrode of the new contacted body as an exchange pin board. If a member having a large number of conductive pins corresponding to the above is prepared and replaced with an old one, a portion of the contact device other than the replacement pin board can be used as it is to make contact with a new contact body. Accordingly, it is possible to prevent the number of inspection facilities from increasing and to reduce the inspection cost.

According to the second aspect of the present invention, when the material of the wiring, the terminal and / or the electrode is the same but the material is different, the shape of the portion of the conductive pin which is in contact with the material can be switched according to the material. it can. Therefore,
If a conductive pin having one end formed in, for example, a crown shape and the other end formed in, for example, a needle shape is prepared and detachably attached to a replacement pin board, the contacted body is provided. By attaching a conductive pin so that the end that is suitable for the above faces the opposite base side, it is possible to cope with two types of contacted bodies having wirings of different materials and the like.

According to the third aspect of the present invention, the position of the guide rod can be changed by rotating the guide socket. The positional relationship of the contact body to the replacement pin board can be finely adjusted.

According to the conductive pin of the fourth aspect, since both ends are formed in different types of contact shapes, the contact device of the second aspect can be realized.

According to the fifth aspect of the present invention, the guide rod housing hole into which the guide rod is fitted is formed so that its central axis is eccentric from the central axis of the guide socket itself. Can be realized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a contact device of the present invention.

FIGS. 2A to 2C show one specific example of an exchange pin board used in the contact device of the present invention.
(A), (B) is sectional drawing in the state which made the direction of the conductive pin mutually different, (C) is an exploded perspective view.

FIGS. 3A to 3C are explanatory views of a specific example of a mechanism for positioning a printed circuit board to be inspected on a replacement pin board; FIGS.
(A) is a perspective view showing a main part of the positioning mechanism, (B) is a perspective view showing an eccentric guide socket and a guide rod used therein, and (C) is a perspective view showing a conventional guide socket and a guide rod.

FIG. 4 is a perspective view showing a modified example of the contact device of the present invention, omitting an exchange pin board.

FIG. 5 is a perspective view showing a conventional example of a contact device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base, 3 ... Connector, 4 ... Installation pin board, 6, 9 ... Conductive pins, 6a ... Conductive pins with different contact shapes at both ends, 7, 10 ... Coating Electric wire, 16 ... guide socket, 17 ... guide rod,
18 ... printed circuit board to be inspected, 19 ... guide hole,
20: Guide socket storage hole.

Claims (5)

[Claims] 1. A connector is mounted on a part of a base, and an installation pin board is floated and mounted on a part of the base other than a mounting portion of the connector, and a base of each conductive pin mounted on the installation pin board is provided. The end of the side is electrically connected to each terminal of the connector, and the replacement pin board is detachably mounted by floating the replacement pin board on a portion other than the mounting portion of the connector of the base and the mounting portion of the installation pin board. Electrically connecting the base-side end of each of the attached conductive pins and the opposite-base-side end of each of the conductive pins attached to the installation pin board; A contact device wherein an end on the side is a contact portion with each contact portion of a contacted body. 2. Each of the conductive pins attached to the replacement pin board is detachable, and both ends are formed in different types of contact shapes, and the electrical connection between the conductive pins of the replacement pin board and the conductive pins of the installation pin board is made. 2. The contact device according to claim 1, wherein the electrical connection is made by contact between a cord connected to the installation pin board and an end of the conductive pin of the replacement pin board on the back side. 3. The positioning of the contacted body with respect to the replacement pin board is such that a guide socket in which the guide rod is fitted is housed in the replacement pin board side, and a guide hole in which the guide rod is fitted is formed in the contacted body. A guide rod in the guide socket is fitted into the guide hole, the guide socket is housed rotatably around a central axis with respect to a replacement pin board, and the guide rod is housed in the guide socket. 3. The fitting according to claim 1, wherein the fitting is carried out at a position deviated from the central axis.
The contact device according to the above. 4. A conductive pin wherein both ends are formed in different types of contact shapes. 5. The guide socket according to claim 3, wherein the guide rod housing hole into which the guide rod is fitted is formed at a position where its central axis is eccentric from its own central axis.