JP2015052511A - Electric inspection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric inspection device capable of simultaneously performing recognition and inspection of a position of an electric circuit pattern and improving a positioning accuracy of the electric circuit pattern and an electric contact.SOLUTION: An electric inspection device 10 for performing an electric inspection of an electric circuit board 11 where a plurality of electric circuit patterns 11b including a plurality of electric contacts 11c are arranged at a constant pitch is provided with an electric inspection jig 20a including electric contact groups 25A, 25B composed of a plurality of electric contacts 25 and an image recognition camera 26. A pitch by which the electric inspection jig 20a is moved is made twice of a pitch P of the plurality of electric circuit patterns 11b in order to cause the electric contact groups 25A, 25B to perform an electric inspection of the electric circuit pattern 11b and to cause the image recognition camera 26 to recognize a position of the electric circuit pattern 11b. During the performance of the electric inspection of the electric circuit pattern 11b by the electric contact groups 25A, 25B, the image recognition camera 26 recognizes the next electric circuit pattern 11b.

Description

  The present invention relates to an electrical inspection apparatus that performs electrical inspection of an electrical circuit pattern by bringing an electrical contact into contact with electrical contacts provided on the electrical circuit pattern of an electrical circuit board.

  Conventionally, it is determined whether the electric circuit pattern formed on the electric circuit board is good or bad by the presence / absence of electric continuity. In this case, the electric contact is provided to the electric contact provided on the electric circuit pattern of the electric circuit board. Are in contact with each other for electrical inspection (see, for example, Patent Document 1). In this board inspection apparatus (electrical inspection apparatus), a main camera that moves integrally with the inspection jig images the table positioning mark and the board positioning mark provided on the transfer table, and an auxiliary camera attached to the transfer table. The jig positioning mark provided on the inspection jig is imaged. Then, the relative positional relationship between the substrate and the inspection jig is automatically obtained from the mark image thus captured, and the substrate is inspected.

JP 2000-55971 A

  However, in the conventional electric inspection apparatus, the processing time becomes longer because the confirmation of the position of the substrate and the inspection jig by the main camera and the auxiliary camera and the processing of bringing the substrate and the electric contactor into contact with each other are performed separately. There is a problem that an error is likely to occur in the position between the substrate and the electric contact.

  The present invention has been made in order to cope with the above-described problems. The object of the present invention is to simultaneously reduce the processing time by simultaneously recognizing the position of the electric circuit pattern and inspecting the electric circuit pattern. It is an object of the present invention to provide an electrical inspection apparatus that can improve the positioning accuracy between the electrical contact and the electrical contact. In the description of each constituent element of the present invention below, the reference numerals of corresponding portions of the embodiment are shown in parentheses in order to facilitate understanding of the present invention. The present invention should not be construed as being limited to the configurations of the corresponding portions indicated by the reference numerals of the forms.

  In order to solve the above-described problem, the electrical inspection apparatus according to the present invention is characterized in that a plurality of electrical circuit patterns (11b) each having a plurality of electrical contacts (11c) are arranged at a constant pitch. An electrical inspection apparatus (10) for performing electrical inspection of an electrical circuit board (11), comprising: a plurality of electrical contacts for performing electrical inspection of an electrical circuit pattern by contacting a plurality of electrical contacts; The electric inspection jigs (20a, 30a, 40a, 50a) for sequentially bringing the electric contacts into contact with the electric contacts of the electric circuit putters by being moved relative to the electric circuit putters are installed in the electric inspection jigs. And an image recognition camera (26, 36, 46, 56) for sequentially recognizing the positions of a plurality of electric circuit patterns by moving with respect to the electric circuit board. It is composed of n sets of electrical contact groups (25A, 25B, 25C, 25D) corresponding to an integer n number of electric circuit patterns connected in the moving direction of the electric inspection jig, and a plurality of electric elements of n number of electric circuit patterns. The electrical inspection jig is moved with respect to the electrical circuit board so that the plurality of electrical contacts of the n electrical contact groups are sequentially brought into contact with the target contact and the image recognition camera sequentially recognizes the position of the electrical circuit pattern. The movement pitch (P) during a series of processes to be performed is set to n times the pitch of the plurality of electric circuit patterns, and the electric circuit pattern recognized by the image recognition camera is later subjected to electric inspection by the plurality of electric contacts. In the middle of a series of processing, while the plurality of electrical contacts conduct an electrical inspection of the electrical circuit pattern, the image recognition camera It lies in the fact that as recognition to.

  In the electrical inspection apparatus according to the present invention, an image recognition camera is installed in an electrical inspection jig having a plurality of electrical contacts. Then, the electric contact is moved sequentially for the inspection of the electric circuit pattern, and the electric inspection jig is moved intermittently to move the image recognition camera sequentially for the recognition of the position of the electric circuit pattern. The movement pitch is set to an integral multiple of the pitch of the plurality of electric circuit patterns. This integer multiple is set according to the number of sets of electrical contact groups composed of a plurality of electrical contacts. If there is one set of electrical contact groups, the electrical inspection jig is moved relative to the electrical circuit board. The pitch is the same as the pitch of the plurality of electric circuit patterns. If there are two sets of electric contact groups, the pitch for moving the electric inspection jig relative to the electric circuit board is 2 of the pitch of the plurality of electric circuit patterns. Double.

  For this reason, when the electric inspection jig moves according to the set pitch, the electric contact group and the image recognition camera come to face each predetermined electric circuit pattern. Therefore, when the image recognition camera is positioned on the front side in the moving direction when the electric inspection jig moves relative to the electric circuit board and the plurality of electric contacts are positioned on the rear side, the position of the electric circuit pattern is sequentially increased. Inspection can be performed while confirming. In this case, since the electrical circuit pattern recognized by the image recognition camera is an electrical circuit pattern in which a plurality of electrical contacts perform electrical inspection later, the electrical inspection is performed next while the electrical inspection is being performed. It is possible to recognize the exact position of the electric circuit pattern immediately before it is performed. In this case, the term “after” in which the electrical inspection is performed may be the next, the next, or the next.

  Further, in the middle of the series of processes, the image recognition camera recognizes the electric circuit pattern while the plurality of electric contacts perform the electric inspection of the electric circuit pattern. The confirmation of the position and the inspection of the electric circuit pattern by a plurality of electric contacts are simultaneously performed, so that the processing time can be shortened. Note that the middle of the series of processes refers to the process of only the position recognition performed in the first part and the last in the predetermined column when the process is performed along the arranged electric circuit pattern. This is a process performed between the inspection only process. In addition, since the pitch at which the electric inspection jig moves with respect to the electric circuit board is set to an integral multiple of the pitch of the electric circuit pattern, the electric circuit is recognized after the image recognition camera recognizes the predetermined electric circuit pattern. It is possible to minimize the distance that the electric inspection jig moves before the patterns are electrically inspected by the plurality of electric contacts, thereby improving the positioning accuracy of the electric circuit pattern and the electric contact group.

  In the present invention, in the first process of the series of processes, only the position of the electric circuit pattern is recognized by the image recognition camera, and in the last process, only the inspection of the electric circuit pattern by a plurality of electric contacts is performed. Is done. In this case, when a plurality of electrical contacts are configured by a set of electrical contact groups that detect one electrical circuit pattern, one image recognition camera is provided while performing electrical inspection of each electrical circuit pattern. The position of the electric circuit pattern is recognized one by one. In addition, when a plurality of electrical contacts are composed of, for example, two sets of electrical contact groups that simultaneously detect two electrical circuit patterns, and an image recognition camera is installed in the vicinity of one electrical contact group, Two electrical circuit patterns can be electrically inspected, and the image recognition camera recognizes the position of every other electrical circuit pattern.

  In addition, the electrical contact group composed of a plurality of electrical contacts can be arranged not only in the moving direction of the electric inspection jig but also in a direction orthogonal to the moving direction. In this case, the electrical circuit patterns arranged in a plurality of rows are subjected to electrical inspection at the same time. Therefore, even if a plurality of electrical contact groups are arranged in a direction orthogonal to the moving direction of the electric inspection jig, the movement pitch of the electric inspection jig is not affected. Furthermore, the distance between the electrical contact group and the image recognition camera can be set according to the structure of the electrical inspection jig, but is preferably set to the same distance as the pitch of the plurality of electrical circuit patterns.

  Another structural feature of the electrical inspection apparatus according to the present invention is that the center positions (O1, O2, O1 ′) of the plurality of electrical contacts when the plurality of electrical contacts are at the positions of the plurality of electrical contacts. , O2 ′) and the center position of the image recognition camera when the electric circuit pattern is recognized, the distance along the moving direction of the electric inspection jig is an integral multiple of the pitch of the plurality of electric circuit patterns. It is in doing so.

  In this case, the position of the image recognition camera is not particularly required to be a fixed point of the electric circuit pattern at the center of the image captured by the image recognition camera, and the image recognition camera determines the position of the electric circuit pattern. It suffices if it is in a recognizable position. For this reason, the installation position of the image recognition camera is within a certain range. That is, even if a fixed point of the electrical circuit pattern is located at a position off the center of the image captured by the image recognition camera, the fixed point is the same position in the captured image when each electrical circuit pattern is captured. If it is in.

  For this reason, the camera for image recognition can set an installation position in the range which can image the fixed point mentioned above. Further, the image recognition camera may be installed at a position close to the electric circuit board, or may be installed at a position far from the electric circuit board. According to the present invention, the distance between the installation position of the image recognition camera and the installation positions of the plurality of electrical contacts is an integral multiple of the pitch of the electric circuit pattern while giving some degree of freedom to the installation position of the image recognition camera. Can be adapted to

  Still another structural feature of the electrical inspection apparatus according to the present invention is that the electrical circuit pattern is provided with a reference mark (11d), and the image recognition camera includes a position recognition area (26c, 26c ′). Is to recognize the position of the electric circuit pattern. According to the present invention, the position recognition area including the reference mark imaged by the image recognition camera can be made narrower than the area of the electric circuit pattern. The distance between the installation position of the image recognition camera and the installation positions of the plurality of electrical contacts can be adjusted to an integral multiple of the pitch of the electrical circuit pattern.

  Still another structural feature of the electrical inspection apparatus according to the present invention is that an image recognition camera (26) is arranged in a plurality of electrical contacts and installed in an electrical inspection jig (20a), and an electrical circuit board is provided. It is to be able to face. According to the present invention, since the distance between the image recognition camera and the plurality of electrical contacts with respect to the electric circuit board can be made substantially the same, the distance between the image recognition camera and the plurality of electrical contacts is accurately set to the set length. It becomes easy to match. Further, since the position of the image recognition camera with respect to the electric circuit board is close, the recognition of the electric circuit pattern by the image recognition camera becomes accurate.

  Further, another structural feature of the electrical inspection apparatus according to the present invention is that the through hole (32a, 33a) is provided in a portion of the electrical inspection jig (30a) facing the electric circuit board, and the electrical inspection jig. The camera for image recognition (36) is installed on the opposite side of the through hole. In this case, the image recognition camera may be installed outside the through hole in the electric inspection jig, or a part thereof may protrude to the outside. According to the present invention, the image recognition camera can be installed even when there is no space for installing the image recognition camera inside or on the side of the electric inspection jig. Moreover, since it is only necessary to provide a through hole in the vicinity of the portion where the plurality of electrical contacts are located in the electrical inspection jig, the structure of the electrical inspection jig can be simplified.

  Still another structural feature of the electrical inspection apparatus according to the present invention resides in that an image recognition camera (46) is installed on the side of the electrical inspection jig (40a). According to the present invention, since a space for installing an image recognition camera in the electric inspection jig is not required, the electric inspection jig can be miniaturized and the structure can be simplified.

  Further, another structural feature of the electrical inspection apparatus according to the present invention is that an image recognition camera (56) is installed on the side of the electrical inspection jig (50a) via a positioning mechanism (57). is there. According to the present invention, since the position of the image recognition camera can be adjusted by the positioning mechanism, the installation of the image recognition camera does not have to be an accurate installation position, and the installation of the image recognition camera is facilitated. Also in the present invention, a space for installing the image recognition camera in the electric inspection jig is not required, and thus the electric inspection jig can be downsized and the structure can be simplified.

It is the schematic block diagram which showed the principal part of the electrical inspection apparatus which concerns on 1st Embodiment of this invention. It is the perspective view which showed the electric circuit board | substrate with which the electric circuit pattern was formed. It is the top view which showed the electric circuit pattern. It is sectional drawing which showed the state which test | inspects an electric circuit board with the electric inspection jig | tool with which the camera for image recognition was attached. It is explanatory drawing which showed the positional relationship of an electrical contact group and an image recognition camera. It is explanatory drawing which showed the order of the movement of the camera for image recognition, and an electric inspection jig. It is explanatory drawing which showed the positional relationship of the electrical contact group with which the electrical inspection apparatus which concerns on the modification of 1st Embodiment is provided, and the camera for image recognition. It is explanatory drawing which showed the order of the movement of the camera for image recognition with which the electric inspection apparatus which concerns on the modification of 1st Embodiment is equipped, and an electric inspection jig. It is sectional drawing which showed the state which test | inspects an electric circuit board | substrate with the electric inspection jig | tool with which the camera for image recognition which concerns on 2nd Embodiment of this invention was attached. It is sectional drawing which showed the state which test | inspects an electric circuit board with the electric inspection jig | tool with which the camera for image recognition which concerns on 3rd Embodiment of this invention was attached. It is sectional drawing which showed the state which test | inspects an electric circuit board with the electric inspection jig | tool with which the camera for image recognition which concerns on 4th Embodiment of this invention was attached.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram illustrating a main part of the electrical inspection apparatus 10 according to the embodiment. The electrical inspection apparatus 10 is an apparatus for inspecting whether or not an electrical circuit pattern 11b (see FIG. 2) provided on an electrical circuit board 11 that is an inspection object is properly conducted or insulated. As shown in FIG. 2, the electric circuit board 11 is configured by arranging a plurality of electric circuit patterns 11b at regular intervals on the front and rear and the left and right on a thin board 11a. A plurality of electrical contacts 11c (see FIG. 4) and one reference mark 11d (see FIG. 3) are provided.

  The electric circuit pattern 11b is formed in a square shape whose one side is set to 12 mm, and the length of the gap between two adjacent electric circuit patterns 11b is set to 0.5 mm. For this reason, the pitch P, which is the length between the center positions of the two adjacent electric circuit patterns 11b, is 12.5 mm. Further, the plurality of electrical contacts 11c are distributed and arranged in the portion where the electrical circuit in the electrical circuit pattern 11b is formed, and the reference mark 11d is formed by the electrical circuit in the electrical circuit pattern 11b as shown in FIG. It is provided in the vicinity of one corner of the portion that is not formed.

  The electric inspection apparatus 10 includes an installation apparatus (not shown) for installing the electric circuit board 11, a moving apparatus 12, a movable unit 20 that moves along the surface of the electric circuit board 11 by driving the moving apparatus 12, and a movable The electrical inspection processing unit 28 is connected to the unit 20 via an information transmission cable 28a.

  Although not shown, the installation device for installing the electric circuit board 11 includes an X-axis rail that is arranged in parallel at a distance and extends in the X-axis direction (the direction indicated by the arrow X in the left-right direction in FIG. 1) and a pair. The Y-axis rails are movably attached to the X-axis rails and extend in the Y-axis direction (the direction indicated by the arrow Y in the front-rear direction in FIG. 1), and are movably attached to the pair of Y-axis rails. And a pair of gripping portions (four in total). Then, by driving the drive unit, the pair of Y-axis rails move independently along the pair of X-axis rails, and the four gripping units independently move along any one of the pair of Y-axis rails. Moving. For this reason, the electric circuit board 11 can be supported by holding the four corners of the electric circuit board 11 with the four holding portions.

  The moving device 12 spans between a pair of X-axis rails 13a and 13b arranged in parallel along the X-axis direction, and the X-axis rails 13a and 13b, and is attached so as to be movable in the X-axis direction. A mounting portion 14 and a Y-axis mounting portion 15 attached to the X-axis mounting portion 14 and capable of moving in the Y-axis direction are provided. The X-axis mounting portion 14 is spanned in parallel with a gap between the sliding portions 14a and 14b slidably engaged with the X-axis rails 13a and 13b and the opposing surfaces of the sliding portions 14a and 14b. The pair of Y-axis rails 14c and 14d are moved along the X-axis rails 13a and 13b by driving of a driving device (not shown).

  The Y-axis mounting portion 15 is configured by a mounting member that is attached to the Y-axis rails 14c and 14d and is movable in the Y-axis direction, and has a plate-like shape that spans the Y-axis rails 14c and 14d. The sliding part 15a and the attachment part 15b to which the movable part 20 is attached are comprised. The Y-axis mounting portion 15 moves along the Y-axis rails 14c and 14d by driving of a driving device (not shown). Further, a Z-axis movable part and a turning shaft (not shown) are provided on the attachment part 15b of the Y-axis mounting part 15, and the movable part 20 is attached to the attachment part 15b via the turning axis and the Z-axis movable part. It is connected to.

  The Z-axis movable part moves in the Z-axis direction (the direction indicated by the arrow Z in the vertical direction in FIG. 1) by driving a drive device (not shown), and the swivel axis is driven by the drive device (not shown). It rotates in the direction around the axis on the horizontal plane (the direction indicated by the arrow R in FIG. 1). For this reason, the movable part 20 rotates around the turning axis while moving in the X-axis direction, the Y-axis direction, and the Z-axis direction by driving of each driving device. Moreover, the support part 17 shown in FIG. 4 is attached to the attachment part 15b, and this support part 17 can move to an up-down direction. The support portion 17 supports the electric inspection jig 20a, and the left and right symmetrical side frame portions 17a and 17b arranged to face each other with a space therebetween, and the rear ends of these side frame portions 17a and 17b. It consists of a connecting part (not shown) that connects the parts, and a frame that is open at the front.

  The movable unit 20 includes an electrical inspection jig 20a, an image recognition camera 26, and an electrical inspection control unit 27. As shown in FIG. 4, the electric inspection jig 20a includes a plurality of rectangular plates, ie, a base plate 21, an intermediate plate 22, and a lower plate 23, which are assembled with an upper column 24 and a lower column 24a. An electrical contact 25 is attached and configured. FIG. 1 shows an electric inspection jig 20a. This electric inspection jig 20a is schematically shown, and is slightly different from the electric inspection jig 20a shown in FIG. Yes.

  The base plate 21 is formed in a frame shape in which a substantially rectangular through hole 21 a is formed in the center portion, and is fixed to the side frame portions 17 a and 17 b of the support portion 17. The intermediate plate 22 is formed in a plate that is thinner and smaller than the base plate 21, and four corners are fixed to the lower surface of the base plate 21 via four upper columns 24. The lower plate 23 is formed in a plate smaller than the intermediate plate 22, and four corners are fixed to the lower surface of the intermediate plate 22 via four lower columns 24 a.

  For this reason, the assembly composed of the base plate 21, the intermediate plate 22, the lower plate 23, and the like moves up and down together with the support portion 17 when the support portion 17 moves up and down. In addition, a plurality of through holes are formed at positions facing each other in a portion excluding one end side (right side in FIG. 1) of the intermediate plate 22 and the lower plate 23, and a plurality of through holes are formed in the plurality of through holes. Both end portions of the electric contact 25 are inserted. The arrangement of the plurality of through holes in the intermediate plate 22 and the plurality of through holes in the lower plate 23 are the same as the arrangement of the electrical contacts 11c formed on the electric circuit board 11, respectively. The arrangement of the contacts 25 is the same as the arrangement of the electrical contacts 11c.

  These electric contacts 25 are arranged so as to correspond to the electric contacts 11c of the two adjacent electric circuit patterns 11b. Moreover, the front-end | tip part (lower end part) of the flexible wire cable 25a is electrically connected to the upper end part of these electric contacts 25, and the rear end part (upper end part) of the wire cable 25a is the base plate 21. The base plate 21 extends through the through hole 21a. The lower end portion of the electric contact 25 protrudes downward from the lower surface of the lower plate 23, and the protruding end of the lower end portion of the electric contact 25 is moved to the electric contact 11 c of the electric circuit board 11 by the movement of the movable portion 20. Abut.

  The lower end portion of the electric contact 25 is formed in a thin needle shape, and when the electric contact 11c of the electric circuit board 11 comes into contact with the movement of the movable portion 20, the electric contacts 25 are energized. It is determined whether or not the electric circuit pattern 11b of the electric circuit board 11 is properly conducted according to the magnitude of the electric resistance value. This is determined by setting an inspection determination value based on the electric resistance value of the non-defective electric circuit board 11 and by a ratio to the inspection determination value. That is, in the case of continuity inspection, if the detected electrical resistance value is equal to or less than a predetermined ratio with respect to the inspection determination value, it is determined as a non-defective product, and if it is equal to or greater than the predetermined ratio, it is determined as a defective product. In the case of insulation inspection, if the detected electric resistance value is equal to or greater than a predetermined ratio with respect to the inspection determination value, it is determined as a non-defective product, and if it is equal to or less than the predetermined ratio, it is determined as a defective product.

  Further, attachment holes are formed at positions where one end side portions of the intermediate plate 22 and the lower plate 23 face each other. The image recognition camera 26 is assembled in the electric inspection jig 20a by fixing the lower end of the lens portion 26a in the mounting hole of the lower plate 23 and fixing the camera body 26b in the mounting hole of the intermediate plate 22. ing. The image recognition camera 26 is disposed at a position that is forward when the electric inspection jig 20a moves for electric inspection. Further, as shown in FIG. 5, the image recognition camera 26 is arranged at a distance from the plurality of electrical contacts 25.

  The electric contact 25 is composed of two sets of electric contact groups 25A and 25B so as to correspond to the electric contacts 11c of the two electric circuit patterns 11b adjacent to the left and right. The distance a between the center O of the position recognition area 26c to be imaged and the center O1 of the electric contact group 25A is set to 25 mm, which is twice the pitch P of the electric circuit pattern 11b. Therefore, the distance b between the center O of the position recognition region 26c and the center O2 of the electric contact group 25B is 37.5 mm, which is three times the pitch P of the electric circuit pattern 11b.

  The electrical inspection control unit 27 includes a plurality of electrical components 27b disposed on the upper surface of the plate-like base body 27a. The base body 27a is formed of a printed wiring board, and is fixed to the attachment portion 15b by a screw member (not shown) so as to face the upper surface of the base plate 21. A plurality of conductive portions are provided on the lower surface of the base body 27a in the same arrangement as the rear end portion of the wire cable 25a. Each conductive portion contacts the rear end portion of each wire cable 25a when the support portion 17 is positioned above, and is separated from the rear end portion of each wire cable 25a when the support portion 17 is positioned below.

  The electrical components 27b are arranged in a grid pattern on the upper surface of the base body 27a, and each of the electrical components 27b includes a circuit and a device that include a CPU, ROM, RAM, timer, and the like necessary for electrical inspection. The predetermined electrical component 27b is connected via a printed wiring of the base body 27a. The tip of the information transmission cable 28a is connected to one corner of the base body 27a via a connection terminal 27c, and the electrical inspection processing unit 28 is connected to the rear end of the information transmission cable 28a. The electrical inspection processing unit 28 performs other control necessary for electrical inspection that is not performed by the electrical inspection control unit 27. The electrical inspection processing unit 28 includes peripheral devices such as an operation panel for an operator to perform each operation of the electrical inspection device 10, a display panel for displaying inspection results, and other devices and equipment, or X, Y and Z axis control devices are connected.

  When conducting the electrical connection test of the electrical circuit board 11 using the electrical inspection apparatus 10 configured in this way, the rear row (upper row in FIG. 6) is directed from the right end to the left side of the electrical circuit board 11 shown in FIG. Two electrical circuit patterns 11b are inspected from the first row toward the front row (lower row in FIG. 6). In this continuity test, first, the electric circuit board 11 is installed in an installation apparatus. Then, each driving device is driven to move the movable portion 20 with respect to the electric circuit board 11, and the plurality of reference marks 11d are picked up by the image recognition camera 26, thereby adjusting the orientation of the electric circuit board 11. Then, the arrangement of the electric circuit patterns 11b is made to follow the moving direction of the movable portion 20.

  Next, by driving each driving device, the image recognition camera 26 is moved above the second electric circuit pattern 11b from the right in the rear row of the electric circuit board 11 (position A in FIG. 6). The image recognition camera 26 captures the position recognition area 26c including the reference mark 11d and recognizes the position of the reference mark 11d. The position of the imaged reference mark 11d is compared with reference position data obtained as a reference position in advance, and if there is no difference between the position of the imaged reference mark 11d and the reference position data, it is determined that it is in an appropriate state. If there is a difference, the installation position of the electric circuit board 11 is finely adjusted. At this time, the electric contact groups 25 </ b> A and 25 </ b> B are located on the outer side of the right end of the rear row of the electric circuit board 11.

  Next, the electric inspection jig 20a and the image recognition camera 26 are raised, and the movable portion 20 is moved to the left by a distance twice the pitch P of the electric circuit pattern 11b (position B). Thereafter, the electric inspection jig 20a and the image recognition camera 26 are moved down to bring the tips of the electric contacts 25 into contact with the electric contacts 11c. In this state, the electrical inspection of the first two electric circuit patterns 11b of the electric circuit board 11 is performed. At the same time, the image recognition camera 26 recognizes the position of the reference mark 11d by imaging the position recognition area 26c of the fourth electric circuit pattern 11b from the right in the back row. Thereby, it is recognized that the position of the electric circuit pattern 11b to be inspected next is appropriate.

  In this case, each driving device moves according to a command signal transmitted from the CPU, and the electric contactor 25 operates according to a command signal transmitted from the CPU. In other words, based on the command signal transmitted from the CPU, the connection between the wire cable 25a and the conductive portion is switched, and the predetermined electrical contacts 25 are connected to the electrical contacts 11c facing each other. Thereafter, an inspection signal is input to the electric circuit pattern 11b via the electric contactor 25. The input inspection signal is taken out from the electrical contactor 25 connected to the other electrical contact 11c and input to the measurement unit, and the measurement unit measures the electrical resistance value.

  Further, when the next two electric circuit patterns 11b on the electric circuit board 11 are to be electrically inspected, the electric inspection jig 20a and the image recognition camera 26 are raised by driving each driving device again. Next, after again moving the movable part 20 to the left by a distance twice the pitch P of the electric circuit pattern 11b, the electric inspection jig 20a and the image recognition camera 26 are lowered (position C). Then, the third and fourth electric circuit patterns 11b from the right in the rear row are inspected, and the position recognition area 26c of the sixth electric circuit pattern 11b from the right in the rear row is imaged to recognize the position of the reference mark 11d.

  Further, the electric inspection jig 20a and the image recognition camera 26 are moved in the order of positions D and E, and the above-described operations are sequentially repeated to inspect all the electric circuit patterns 11b on the electric circuit board 11. . When shifting from the rear row to the inspection of the electric circuit pattern 11b in the front row, the electric inspection jig 20a and the image recognition camera 26 are moved forward (front row side) by the pitch P of the electric circuit pattern 11b. Then, perform the operation described above.

  As described above, in the electrical inspection apparatus 10 according to the present embodiment, the image recognition camera 26 is installed in the electrical inspection jig 20a including the electrical contact groups 25A and 25B including the plurality of electrical contacts 25. Then, the electric contact 25 is moved for the electric inspection of the two electric circuit patterns 11b, and the electric inspection jig 20a for moving the image recognition camera 26 for the recognition of the position of the electric circuit pattern 11b. The movement pitch is set to twice the pitch P of the electric circuit pattern 11b. Therefore, when the electric inspection jig 20a moves according to the set pitch with respect to the electric circuit board 11, the electric contact groups 25A and 25B and the image recognition camera 26 face the predetermined electric circuit pattern 11b. It becomes like this.

  The image recognition camera 26 is installed such that the distance between the center O of the position recognition region 26c to be imaged and the center O1 of the electric contact group 25A is 25 mm, which is twice the pitch P of the electric circuit pattern 11b. ing. Therefore, first, when the position of the electric circuit pattern 11b is recognized, the electric inspection of the two electric circuit patterns 11b including the electric circuit pattern 11b whose position is recognized by the subsequent processing and the electric inspection to be inspected next are performed. The position of the circuit pattern 11b is sequentially recognized simultaneously. For this reason, the processing time can be shortened.

  Further, since the pitch at which the electric inspection jig 20a moves is set to be twice the pitch P of the plurality of electric circuit patterns 11b, the image recognition camera 26 recognizes the electric circuit pattern 11b and then the electric circuit The distance that the electric inspection jig 20a moves before the electric contact groups 25A and 25B electrically inspect the electric circuit pattern 11b including the circuit pattern 11b can be minimized, and thereby the electric contact with the electric circuit pattern 11b. The positioning accuracy of the child groups 25A and 25B is also improved.

  In the present embodiment, the reference mark 11d is provided on the electric circuit pattern 11b, and the position recognition area 26c including the reference mark 11d is captured by the image recognition camera 26 so that the position of the electric circuit pattern 11b is recognized. ing. For this reason, since the image recognition camera 26 has only to image a part of the electric circuit pattern 11b, the positional relationship between the image recognition camera 26 and the electric contact groups 25A and 25B while providing a degree of freedom in the installation position. Can be set to an integral multiple of the pitch P of the electric circuit pattern 11b. Further, since the lens body 26b of the image recognition camera 26 is arranged on the plurality of electric contacts 25 and the camera body 26b is installed in the electric inspection jig 20a, the position of the image recognition camera 26 with respect to the electric circuit board 11 is close. The recognition of the electric circuit pattern 11b by the image recognition camera 26 becomes accurate.

(Modification of the first embodiment)
FIG. 7 shows two sets of an image recognition camera 26 (position recognition region 26 c ′ shown) provided in the electrical inspection apparatus according to the modification of the first embodiment described above and a plurality of electrical contacts 25. The positional relationship with the electrical contact groups 25C and 25D is shown. The electrical contact groups 25C and 25D are arranged at the front and rear so as to correspond to the two electrical circuit patterns 11b adjacent to each other at the front and rear, and the image recognition camera 26 is located at the front side. It is arranged on the left side. The distance c in the left-right direction between the center O ′ of the position recognition region 26c ′ and the center O1 ′ of the electric contact group 25C and the center O2 ′ of the electric contact group 25D is the same as the pitch P of the electric circuit pattern 11b. .5mm is set. The rest of the configuration of the electrical inspection apparatus according to this modification is the same as that of the electrical inspection apparatus 10 described above. Therefore, hereinafter, description will be made using the same reference numerals for the same portions.

  When conducting the continuity inspection of the electric circuit board 11 using the electric inspection apparatus according to the modified example configured as described above, the front and rear two of the electric circuit board 11 shown in FIG. The inspection of the electric circuit pattern 11b is performed from the rear row side (upper row in FIG. 8) toward the front row side (lower row in FIG. 8). In this continuity test, as in the above-described embodiment, first, after the electric circuit board 11 is installed in the installation apparatus, the movable unit 20 is moved with respect to the electric circuit board 11 and a plurality of images are recognized by the image recognition camera 26. By imaging the reference mark 11d, the orientation of the electric circuit board 11 is adjusted so that the electric circuit patterns 11b are aligned along the moving direction of the movable portion 20.

  Next, the image recognition camera 26 is moved above the electric circuit pattern 11b at the right end of the second column from the rear column on the electric circuit board 11 (position A 'in FIG. 8). Then, the image recognition camera 26 captures the position recognition area 26c 'including the reference mark 11d and recognizes the position of the reference mark 11d. At this time, the electric contact group 25C is located on the outer side of the right end of the last row of the electric circuit board 11, and the electric contact group 25D is arranged on the outer side of the right end of the second row from the rear row of the electric circuit board 11. Is located.

  Next, the electric inspection jig 20a and the image recognition camera 26 are raised, and the movable part 20 is moved to the left by the same distance as the pitch P of the electric circuit pattern 11b (position B '). Thereafter, the electric inspection jig 20a and the image recognition camera 26 are moved down to bring the tips of the electric contacts 25 into contact with the electric contacts 11c. In this state, the electrical inspection of the first two electric circuit patterns 11b of the electric circuit board 11 is performed. At the same time, the image recognition camera 26 captures the position recognition area 26c 'of the second electric circuit pattern 11b from the right in the second row from the rear row and recognizes the position of the reference mark 11d. Thereby, it is recognized that the position of the electric circuit pattern 11b to be inspected next is appropriate.

  When the next two electric circuit patterns 11b on the electric circuit board 11 are to be inspected electrically, the electrical inspection jig 20a and the image recognition camera 26 are raised again. Next, after the movable portion 20 is again moved to the left by the same distance as the pitch P of the electric circuit pattern 11b, the electric inspection jig 20a and the image recognition camera 26 are lowered (position C '). Then, the second electrical circuit pattern 11b from the right in the second column from the right in the last column and the second electrical circuit pattern 11b from the right in the second column are tested, and the third electrical circuit pattern 11b from the right in the second column from the rear column. The position recognition area 26c ′ is imaged to recognize the position of the reference mark 11d.

  Further, the electric inspection jig 20a and the image recognition camera 26 are moved in order from the position D ′ to H ′, and the above-described operations are sequentially repeated to inspect all the electric circuit patterns 11b on the electric circuit board 11. I do. In this case, when shifting from the subsequent row to the inspection of the electric circuit pattern 11b in the previous row, the electric inspection jig 20a and the image recognition camera 26 are moved forward by twice the pitch P of the electric circuit pattern 11b. After moving to the (front row side), the above-described operation is performed.

  According to the electrical inspection apparatus according to this modification, the positions of all the electrical circuit patterns 11b in one of the two rows of electrical circuit patterns 11b along the movement direction of the electrical inspection jig 20a and the image recognition camera 26 are arranged. Therefore, the electrical circuit pattern 11b is more accurately recognized by the image recognition camera 26. Other functions and effects of the electrical inspection apparatus according to this modification are the same as the functions and effects of the above-described embodiment. As another modification, two groups of electrical contacts (four in total) may be arranged on the left, right, and front and rear, respectively. In this case, the process shown in FIG. 6 is performed every two rows in the front-rear direction. According to this modification, an efficient electrical inspection can be performed.

(Second Embodiment)
FIG. 9 shows an electric inspection of the electric circuit board 11 with an electric inspection jig 30a provided in the electric inspection apparatus according to the second embodiment of the present invention and an image recognition camera 36 installed in the electric inspection jig 30a. It shows the state to perform. In this electric inspection jig 30a, through holes 32a and 33a are formed at positions facing each other on one end side portion of the intermediate plate 32 and the lower plate 33, and above the through holes 32a and 33a. In addition, an image recognition camera 36 is fixed. In the image recognition camera 36, the lens portion 36 a is positioned in the through hole 31 a of the base plate 31, and the camera body 36 b is fixed above the base plate 31 by an attachment member (not shown). About the structure of the other part of the electrical inspection apparatus which concerns on this 2nd Embodiment, it is the same as the electrical inspection apparatus 10 mentioned above. Therefore, the same reference numerals are given to the same parts.

  The distance between the image recognition camera 36 and the two sets of electrical contact groups 25A and 25B (the distance along the moving direction of the electric inspection jig 30a) is also the above-described image recognition camera 26 and two sets. Is set to be equal to the distance from the electrical contact groups 25A and 25B. And also with the electrical inspection apparatus according to the second embodiment, the electrical inspection of the electrical circuit board 11 is performed by the same method as in the first embodiment described above. According to the present embodiment, there is no need to provide a space for installing the image recognition camera 36, a member for mounting, or a structure inside the electric inspection jig 30a, and a plurality of intermediate plates 32 and lower plates 33 can be provided. Since it is only necessary to provide the through holes 32a and 33a in the vicinity of the portion where the electric contactor 25 is located, the structure of the electric inspection jig 30a can be simplified. Other functions and effects of this embodiment are the same as those of the electrical inspection apparatus 10 described above.

  In addition, as a modification of the electrical inspection apparatus according to the second embodiment, the positional relationship between the image recognition camera 36 and the electrical contact group is the same as that of the image recognition camera 26 shown in FIG. You may make it like the positional relationship of the child groups 25C and 25D. Furthermore, as another modified example, two electrical contact groups (four in total) can be arranged on the left, right, and front and rear, respectively.

(Third embodiment)
FIG. 10 shows an electrical inspection of the electric circuit board 11 with an electrical inspection jig 40a provided in the electrical inspection apparatus according to the third embodiment of the present invention and an image recognition camera 46 installed on the electrical inspection jig 40a. It shows the state to perform. In this electrical inspection apparatus, the image recognition camera 46 is installed not on the interior of the electrical inspection jig 40a but on the side portion. Therefore, the intermediate plate 42 and the lower plate 43 are not provided with attachment holes or through holes, and the entire electric inspection jig 40a is formed in a small size. The image recognition camera 46 includes a camera main body 46b and a lens portion 46a that extends downward from the camera main body 46b and then extends in the horizontal direction. The reflecting mirrors 46c and 46d are built in.

  The reflection mirror 46c reflects light traveling from below, changes the traveling direction by 90 degrees, and advances the light toward the reflection mirror 46d. The reflection mirror 46d reflects the light traveling from the reflection mirror 46c, changes the traveling direction by 90 degrees, and advances it to the camera body 46b side. Thus, the image recognition camera 46 can image the upper surface of the electric circuit board 11. The camera body 46 b is connected to a predetermined portion of the base plate 41 by a connecting member 47. About the structure of the other part of the electrical inspection apparatus which concerns on this 2nd Embodiment, it is the same as the electrical inspection apparatus 10 mentioned above. Therefore, the same reference numerals are given to the same parts.

  In the present embodiment, the distance between the position of the reflection mirror 46c of the image recognition camera 46 and the two sets of electric contact groups 25A and 25B (the distance along the moving direction of the electric inspection jig 40a) is set. The distance is set to be the same as the distance between the image recognition camera 26 described above and the two sets of electrical contact groups 25A and 25B. Also by the electrical inspection apparatus according to the third embodiment, electrical inspection of the electrical circuit board 11 is performed by the same method as in the first embodiment described above. According to the present embodiment, a space for installing the image recognition camera 46 in the electric inspection jig 40a is not required, and thus the electric inspection jig 40a can be downsized and the structure can be simplified. Other functions and effects of this embodiment are the same as those of the electrical inspection apparatus 10 described above.

  In addition, as a modification of the electrical inspection apparatus according to the third embodiment, the positional relationship between the image recognition camera 46 and the electrical contact group is the same as that of the image recognition camera 26 shown in FIG. You may make it like the positional relationship of the child groups 25C and 25D. Furthermore, as another modified example, two electrical contact groups (four in total) can be arranged on the left, right, and front and rear, respectively.

(Fourth embodiment)
FIG. 11 shows an electric inspection of the electric circuit board 11 with an electric inspection jig 50a provided in the electric inspection apparatus according to the fourth embodiment of the present invention and an image recognition camera 56 installed on the electric inspection jig 50a. It shows the state to perform. In this electrical inspection apparatus, the image recognition camera 56 is connected to a predetermined portion of the base plate 51 by a positioning mechanism 57 instead of a connecting member. The positioning mechanism 57 includes an X-axis moving part 57a that can move in the X direction with respect to the base plate 51, and a Z-axis moving part 57b that can move in the Z direction with respect to the X-axis moving part 57a. ing. Therefore, the position of the image recognition camera 56 can be adjusted in the X direction and the Z direction. The rest of the configuration of the electrical inspection apparatus according to the fourth embodiment is the same as that of the electrical inspection apparatus according to the third embodiment described above. Therefore, the same reference numerals are given to the same parts.

  In this embodiment, the positioning mechanism 57 causes the distance between the position of the reflection mirror 46c of the image recognition camera 46 and the two sets of electric contact groups 25A and 25B (in the moving direction of the electric inspection jig 40a). Is positioned so that the distance between the image recognition camera 26 and the two sets of electrical contact groups 25A and 25B is the same. And also by the electrical inspection apparatus according to the fourth embodiment, the electrical inspection of the electrical circuit board 11 is performed by the same method as in the first embodiment described above.

  According to this embodiment, since the position of the image recognition camera 56 can be adjusted by the positioning mechanism 57, the installation of the image recognition camera 56 may not be an accurate installation position. It becomes easy. Also in the present embodiment, a space for installing the image recognition camera 56 in the electric inspection jig 50a is not required, so that the electric inspection jig 50a can be downsized and the structure can be simplified. Other functions and effects of this embodiment are the same as those of the electrical inspection apparatus 10 described above.

  In addition, as a modification of the electrical inspection apparatus according to the fourth embodiment, the positional relationship between the image recognition camera 46 and the electrical contact group is the same as that of the image recognition camera 26 shown in FIG. You may make it like the positional relationship of the child groups 25C and 25D. Furthermore, as another modified example, two electrical contact groups (four in total) can be arranged on the left, right, and front and rear, respectively.

  In addition, this invention is not limited to embodiment mentioned above, It can change suitably. For example, in each of the above-described embodiments and modifications thereof, the two sets of electric contact groups 25A, 25A, 25A, and 25B can correspond to the two electric circuit patterns 11b adjacent to the left and right or front and rear. 25B and electric contact groups 25C and 25D, or four sets of electric contact groups so as to correspond to four electric circuit patterns 11b adjacent to the left and right and front and rear, This electrical contact group may be composed of only one set, or may be composed of three or more than five sets.

  In each of the above-described embodiments, the electrical inspection jig 20a, the image recognition camera 26, and the like are arranged above the electrical circuit board 11, and the electrical inspection of the electrical circuit board 11 is performed from above. Alternatively, an electrical inspection jig 20a, an image recognition camera 26, and the like may be disposed below the electrical circuit board 11, and electrical inspection of the electrical circuit board 11 may be performed from below. Further, if the electrical inspection apparatus is an apparatus for performing electrical inspection of the electrical circuit board 11 having the electrical circuit pattern 11b formed on both the front and back surfaces, the electrical inspection jig 20a and the image recognition jig are provided both above and below the electrical circuit board 11. It is also possible to arrange the cameras 26 and the like so as to perform electrical inspection of the electric circuit board 11 from both above and below. A plurality of image recognition cameras 26 and the like may be provided. Further, the configuration of other parts is not limited to the above-described embodiment, and can be appropriately changed within the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 ... Electrical test | inspection apparatus, 11 ... Electrical circuit board, 11b ... Electrical circuit pattern, 11c ... Electrical contact, 11d point reference mark, 20a, 30a, 40a, 50a ... Electrical test jig, 25 ... Electrical contact, 25A, 25B, 25C, 25D ... Electric contact group, 26, 36, 46, 56 ... Image recognition camera, 26c, 26c '... Position recognition area, 32a, 33a ... Through hole, 57 ... Positioning mechanism, P ... Pitch.

Claims (7)

An electrical inspection apparatus for performing electrical inspection of an electrical circuit board in which a plurality of electrical circuit patterns each having a plurality of electrical contacts are arranged at a constant pitch,
A plurality of electrical contacts for performing electrical inspection of the electrical circuit pattern by contacting the plurality of electrical contacts, and moving the electrical contacts with respect to the electrical circuit board; An electrical inspection jig for sequentially contacting a plurality of electrical contacts of the putter;
An image recognition camera installed on the electric inspection jig and sequentially recognizing positions of the plurality of electric circuit patterns by moving with respect to the electric circuit board;
The plurality of electrical contacts are composed of n sets of electrical contact groups corresponding to an integer number n of the electrical circuit patterns connected in the moving direction of the electrical inspection jig, and a plurality of the n electrical circuit patterns In order to sequentially contact a plurality of electrical contacts of the n sets of electrical contact groups to the electrical contacts of the image recognition apparatus and to cause the image recognition camera to sequentially recognize the position of the electrical circuit pattern, The movement pitch at the time of a series of processes to be moved with respect to the electric circuit board is set to n times the pitch of the plurality of electric circuit patterns,
Further, the electrical circuit pattern recognized by the image recognition camera is an electrical circuit pattern that the electrical contacts later perform electrical inspection, and in the middle of the series of processing, the electrical contacts An electrical inspection apparatus wherein the image recognition camera recognizes an electrical circuit pattern while performing electrical inspection of the electrical circuit pattern.   The center position of the plurality of electrical contacts when the plurality of electrical contacts are at the position of the plurality of electrical contacts, and the center position of the image recognition camera when recognizing the electrical circuit pattern The electric inspection apparatus according to claim 1, wherein a distance along a moving direction of the electric inspection jig is an integral multiple of a pitch of the plurality of electric circuit patterns.   The reference mark is provided in the electric circuit pattern, and the camera for image recognition recognizes the position of the electric circuit pattern by imaging a position recognition region including the reference mark. Electrical inspection device.   4. The image recognition camera according to claim 1, wherein the image recognition camera is arranged in the plurality of electric contacts and installed in the electric inspection jig so as to face the electric circuit board. 5. Electrical inspection device.   The through hole is provided in the part facing the said electric circuit board in the said electric inspection jig, The said camera for image recognition was installed in the other side of the said through hole in the said electric inspection jig. The electrical inspection apparatus according to any one of the above.   The electrical inspection apparatus according to claim 1, wherein the image recognition camera is installed on a side of the electrical inspection jig.   The electrical inspection apparatus according to claim 1, wherein the image recognition camera is installed on a side of the electrical inspection jig via a positioning mechanism.

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