JPS60169777A - Connection apparatus of electric circuit - Google Patents

Abstract

PURPOSE:To make it possible to use the titled apparatus in common in order to test many kinds of electric circuits by simple operation, by selecting electric connection with an electric circuit apparatus by the action of a connection member without applying load to a contact pin. CONSTITUTION:In such a state that a contact pin 24 is naturally inserted in an insert hole 31, an externally directed flange 24b is contacted with the support surface 31b of the insert hole 31 and the displacement of the contact pin 24 to a downward direction is inhibited. In this case, the length of the contact pin 24 in the axial direction is selected so that the lower end of said pin 24 is pushed upwardly by the rising displacement of a connection member 26 and the upper end of the contact pin 24 is contacted with the contact position 30 of a printed wiring board 20, when the displacement operation thereof is completed, to be electrically connected thereto. Further, in the side of one surface of the support member 23 faced to the printed wiring board 20 and in the side of the other surface 23a thereof being the opposite side, the connection member 26 is arranged so as to perform displacement approachable to and separable from the support member 23. The connection member 26 is made of an electric insulating material.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an apparatus for testing the operation of an electric circuit mounted on a printed wiring board or the like.

BACKGROUND OF THE INVENTION The typical prior art for testing the operation of electrical circuits mounted on printed wiring boards consists of a number of contact bins placed below the printed wiring board, each contacting a separate contact bin for each electrical circuit to be tested. They are arranged and configured to correspond to each other. In such prior art, a new test device must be assembled for each different electric circuit to be tested, which requires a great deal of labor, and such a test device must be installed individually for each of a large number of electric circuits. When configured, it requires a large amount of space for storage.

A test device designed to solve these problems includes a mask plate 1 placed below a printed wiring board as shown in FIG. An insertion hole 3 is formed through which a contact pin 2 corresponding to the circuit is inserted, and a contact pin 4 which is unnecessary during test operation is formed.
is configured so that it is not electrically connected to the printed wiring board. The contact pins 2 are connected by wrapping wires 5 to an interface port 6, and this interface board 6 is connected to a tester (not shown).

In such a test device, it is possible to detect signals from the pattern electrodes every time the printed wiring board model is replaced by simply replacing the mask plate 1, but on the other hand, it is time-consuming to attach and remove the mask plate 1. During operation, the unnecessary contact pins 3 are pressed and deformed by the mask plate 1, resulting in a shortened lifespan.

OBJECTIVE The purpose of the present invention is to solve the above-mentioned technical problems, and to provide a test for electrical circuits that can be commonly used to test many types of electrical circuits with simple operations that avoid damaging contact pins. The purpose is to provide equipment.

Example FIG. 2 is a block diagram of one embodiment of the present invention.

A main processing device 10 realized by a microcomputer or the like is connected to a production facility for an electric circuit to be tested via a communication line 12 from an input processing device 11 realized by a microcomputer or the like. Programs and the like for operating the main processing unit 10 are stored in the memory 13. The input/output processing device 11 includes a keyboard 14. A display device 15 and a printer 16 are connected. Inspection circuits AI, A2, . , Bn are connected, and a resistance ladder circuit 18 and a load resistor 19 are provided.

FIG. 3 is a sectional view showing a test state of an electric circuit device 22 including an electric circuit to be tested in which an electronic circuit element 21 and the like are mounted on a printed wiring board 20. The test device 50 according to the present invention basically includes a plurality of contact pins 24 supported by a support member 23 disposed below a printed wiring board 20, and a driving means 2 for vertically displacing and driving the contact pins 24.
5, and a connecting member 26 for selectively displacing the contact pin 24. A pair of support columns 28 and 29 extending upward in FIG. 3 are erected in parallel and spaced apart from each other on the base 27 of the apparatus 22. The pillars 28 and 29 are each formed in an L-shape, and the lower ends of the legs 2 are fixed to the base 27.
8a and 29a, and bent portions 28b and 29b that are connected to the upper ends of the leg portions 28a and 29a and extend in a direction close to each other. Printed wiring of an electrical circuit to be tested is formed on the lower surface of the printed wiring board 20 in FIG. 3 extending between the bent portions 28b and 29b. A support member 23 extending between the legs 28a and 29a is arranged below facing the connection position 30 of the printed wiring.

The support member 23 has insertion holes 31 formed in its thickness direction that individually correspond to the plurality of connection positions 30 . The insertion hole 31 is connected to a first right cylindrical surface 31m that is connected to the hollow portion 32 between the printed wiring board 20 and the support member 23, and is connected to the lower end of the first right cylindrical surface 31m and extends one inch inward in the radial direction to the first right cylindrical surface 31a. Consisting of an annular support surface 31b in a plane perpendicular to the axis and a second right cylindrical surface 31C extending in a straight line from the small diameter end of the support surface 31b, the first right cylindrical surface 31a and the second right cylindrical surface 31 and have the same axis.

A contact pin 24 made of a conductive metal material is individually inserted into the insertion hole 31 . The outer diameter of the contact pin 24 is selected to be smaller than the inner diameter of the second right cylindrical surface 31c, so that the contact pin 24 can be vertically displaced within the insertion hole 31. An outward flange 24b is formed near the head 24a of the contact pin 24. Outward flange 24
The outer diameter of b is selected to be smaller than the inner diameter of the first right cylindrical surface 31a of the insertion hole 31 and larger than the inner diameter of the second right cylindrical surface 31c, so that the contact pin 24 is naturally inserted into the insertion hole 31. In this state, the outward flange 24b is inserted into the insertion hole 31.
3, and the contact pin 24 is prevented from moving downward in FIG. 3.

The length l of the contact bottle 24 in the axial direction is such that the lower end of the contact bottle 24 is pushed upward in FIG. Connection position 30 of printed wiring board 20
selected so that it can be contacted and electrically connected.

A connecting member 26 shown in FIG. 3 is disposed on the other side 23a of the supporting member 23 facing the printed wiring board 2 (N), which is opposite to the other side facing the printed wiring board 2 (N), so as to be movable toward and away from the supporting member 23. Reference numeral 26 is made of an electrically insulating material and has a rectangular shape.The connecting member 26 is connected to the corresponding surface 23 of the support member 23 in individual correspondence with the contact pin 24, as shown in FIG.
a↓A connecting portion 34 is electrically connected to the lower end of the contact bottle 24 when the connecting member 26 is displaced close to the supporting member 23, and is individually connected to the connecting portion 34 via a 2-in 35. and an insertion hole 37 that selectively corresponds to the contact pin 24 and into which the lower end of the contact pin 24 is inserted. The contact portion 36 that is electrically connected to the connecting portion 34 is connected to the connecting member 26.
are arranged in a straight line in the width direction at both ends of the longitudinal direction.

A connecting portion 34a located at the left half of the connecting member 26 in FIG. 4 is connected to a contact portion 36a located at one longitudinal end of the connecting member 26 (left side in FIG. 3) via a line 35a. On the other hand, a contact portion 36b disposed at the other longitudinal end of the contact pillow member 26 (on the right side in FIG. 3) is connected via a line 35b to a connection disposed on the right half of the connecting member 26 in FIG. The section 34b is connected. By forming the contact portions 36 at both ends of the connection member 26 in the longitudinal direction, the output line 3 between the connection portion 34 and the contact portion 36 is formed by the insertion hole 37.
This prevents the installation space of No. 5 from becoming too narrow.

Each contact portion 36a, 36b of the connecting member 26 is electrically connected to a pair of connectors 38 integrally fixed to the driving means 25 shown in the third figure. On the other side of the connecting member 26 opposite to the one side facing the support member 231, a pressing member 40 which can be vertically displaced by 1ζ as shown in FIG. 3 is disposed by the driving means 25. In the suppressing member 40, insertion holes 41 are formed in the thickness direction corresponding to the insertion holes 31 of the support member 23 and extending on one diameter line with the insertion holes 31, respectively. When the pressing member 4o is displaced in a direction approaching the support member 23 by the driving means 25, only the contact pin 24 that contacts the connecting portion 34 of the connecting member 26 is displaced upward, and the electric circuit device 22 is at the connecting position 3.
0, and the other contact pin 24 is inserted into the insertion hole 31 of the connecting member 26 and the insertion hole 41 of the pressing member 4o, and its stationary state is maintained.

The contact pin 24 which is electrically connected to the connection position 30 is electrically connected from the connection part 34 of the connection member 26 to the contact part 36 . This contact portion 36 is connected to a pair of connectors 38 shown in the second figure.
connected to. The connector 38 connects the contact portion 36 to the detection circuit A.
I, A2. . . . are connected to the detection circuits Bl, B2 . ....

selectively connected to Bn, and furthermore a resistor 2-dar circuit 18
It is connected to the load resistor 19 and the like. The electrical circuit device 22 to be tested is powered by power applied from the power supply 42 to the contacts 36 via the connector 38 . The detection circuits A1 to An and B1 to Bn are for level-discriminating the voltage applied from the contact section 36 through the connector 38, or for generating a test signal to the contact section 36, and are for detecting the voltage applied from the detection circuit A1 to the contact section 36. An can be commonly used in various electric circuits to be tested, and can also be used in the detection circuit B1.
Bn is dedicated to testing specific electrical circuits.

The printed wiring formed on the lower surface of the printed wiring board 20 in FIG. 3 is configured such that the connection position 3o is formed at one of the positions indicated by reference numeral 43 in FIG. As shown in FIG.
1 is formed and a connecting member 2 is formed as shown in FIG.
No. 6 insertion holes 37 are formed, and as shown in FIG. 7, an insertion hole 41 for a pressing member 40 is formed. By selectively forming the insertion hole 37 of the connecting member 26 in this way, the contact pin 2 that comes into contact with the connecting portion 34 of the connecting member 26
4 can be electrically contacted to the connection location 30 at the intersection point 43.

The printed wiring board 20i has reference holes 44. as shown in FIG. A sub-reference hole 45 is provided. The sub-reference hole 45 is elongated in the radial direction of the reference hole 44 . This reference hole 4
4 and the sub-reference hole 45 as shown in the third figure.
47, the mutual positions of the support member 23 and the printed wiring board 2o are set accurately. The sub-reference hole 45 is elongated in the radial direction of the reference hole 44, so that positioning can be performed reliably regardless of the error in the spacing between the positioning points 46 and 47 inserted through the reference hole 44 and the sub-reference hole 45. It is.

When testing the electric circuit device 22, the type of electric circuit device 22 to be tested is input to the main processing circuit 1o by operating the keyboard 14. Main processing circuit 1
o is connected to the connecting member 2 corresponding to one electric circuit device 22 by the processing circuit 48 connected to the system path 17.
6 is selected and automatically inserted into the connector 38.

Referring to FIG. 9, when the connecting member 26 is inserted, the suppressing member 4o is lowered by the driving means 25 as shown in FIG. 9(1). In this state, the connecting member 26 corresponding to the type of electric circuit device 22 to be tested is attached to the connector 38.

As shown in FIG. 10, the connector 38 is provided with a contact lever 49 for fixing the connecting member 26. By operating this contact lever 49 in the direction of arrow A, the connecting member 26 is fixed. can be attached to and detached from the connector 38, and the connecting member 26 is fixed to the connector 38 by operating the contact lever 49 in the direction of arrow B. After the connecting member 26 is attached to the connector 38, the suppressing member 40 is upwardly displaced by the driving means 24 as shown in FIG. 9 f8J. At this time, only the contact pin 24 corresponding to the connecting portion 341 of the connecting member 26 is electrically connected to the connecting position 30 of the printed wiring board 20, and the electric circuit of the electric circuit device 22 can be tested. When testing a new electric circuit device 22, the driving means 24 is turned on again as shown in FIG. 9 (4).
The connecting member 26 is lowered by the steps described above, and the connecting member 26 corresponding to the type of the electric circuit device 22 is selected and attached to the test apparatus 5o according to the above-described operation procedure.

In this way, since the contact bin 24 can be selected and connected to the connector circuit 38 using one connecting member 26, replacement is easy, and less space is required. Furthermore, the processing circuit 48 automatically replaces the connecting member 26, thereby improving work efficiency. Furthermore, compared to the case of using the mask plate 1 as shown in the prior art, a switching circuit between an AC signal and a DC signal is required in response to changes in the model of the electric circuit device 22, and the configuration is therefore simpler. Become.

The test operation and test results of the electric circuit testing device 5o are stored in the memory 11 by the operation of the processing circuit 1o, displayed on the display device 15, and sent to the printer 1.
6 can be printed. The test operation is performed in conjunction with the electric circuit device production facility connected to the communication line 12, and the electric circuit device 22 produced by the production facility is connected to the communication line 12.
can be tested immediately and can be used to improve productivity.

Effects As described above, according to the present invention, it is possible to select an electrical connection with an electric circuit device without putting a burden on the contact bottle due to the function of the connecting member, and moreover, it is possible to test many types of electric circuits. Therefore, the present electric circuit testing device can be suitably implemented.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the prior art, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is a sectional view showing a test state of the electric circuit device 22, and FIG. 4 is a plan view of the connecting member 26. Figure, 5th
6 is a plan view of the support member 23, FIG. 7 is a plan view of the pressing member 40, and FIG. 8 is a plan view of the printed wiring board 2o. The plan view and FIG. 9 are simplified diagrams showing the operating state of the test device 50, and FIG. 10 is a diagram showing the state in which the connecting member 26 is attached to the connector 38. 2.4.24... Contact pin, 22... Electric circuit device, 23... Supporting member, 26... Connection member, 30...
・Connection position, 31. 37...Insertion hole, 34...Connection part, 50...Electric circuit testing device representative Patent attorney Kei Nishi Part 1 Figure 1 3b Figure 4 3 Figure 5 Figure 6 Figure 7 Figure 8

Claims (1)

[Scope of Claims] A support member in which insertion holes are formed in the thickness direction of the electric circuit to individually correspond to a plurality of connection positions of the electric circuit to be tested, and the electric circuit is disposed on the surface side of the support member. and, individually inserted into the support member and positioned in the insertion hole in the first position;
one end thereof is movable to a second position further protruding from said surface, wherein in the second position one end is electrically connected to a connection position of an electrical circuit and the other end is away from the other surface of the support member. protruding contact bins disposed on both sides of the support member, the contact bins being movable toward and away from the support member, the contact bins facing the other surface of the support member being movable toward the support member individually corresponding to the contact bins; a connection part that is electrically connected to the other end of the contact bottle when
a connecting member having an insertion hole through which the other end of the contact bottle is inserted selectively corresponding to the contact bottle; and means for receiving a signal from the connection part to test the electric circuit. An electrical circuit testing device featuring: