A double-sided visual inspection device for FPC circuit boards

Abstract

The present invention relates to the field of FPC circuit board detection technology, and specifically proposes a double-sided visual detection device for FPC circuit boards, including: two fixed frames, two supporting groups, an adsorption pick-up and placement mechanism, and a double-sided visual detection mechanism. The present invention cooperates with two supporting groups, two adsorption pick-up and placement mechanisms, and a double-sided visual detection mechanism, which can not only drive the circuit board to move stably, but also support the circuit board through a cross supporting steel wire and perform visual detection on the upper and lower sides of the circuit board at the same time, thereby avoiding the problem of inaccurate visual detection caused by the deviation of the circuit board when flipping the circuit board, shortening the time of visual detection, and the pulling and leveling group cooperates with the elastic component, so that four adsorption seats pull the four upper end surface edges of the circuit board through the adsorption holes, which not only avoids the shaking of the circuit board during movement, but also can re-level the circuit board to avoid wrinkles on the circuit board that affect the accuracy of visual detection.

Description

Technical Field

[0001] The invention relates to the technical field of FPC circuit board detection, and specifically proposes a double-sided visual detection device for an FPC circuit board. Background Art

[0002] FPC (Flexible Printed Circuit Board) is a thin, flexible circuit board that is widely used in consumer electronics, medical devices, aerospace and other fields. In the production process of FPC circuit boards, visual inspection is a very important part, which can ensure the quality of the product, improve the yield rate, and reduce rework and scrap rates.

[0003] Both the upper and lower sides of the FPC circuit board need to be visually inspected during the production process. The traditional double-sided visual inspection method of the circuit board is usually a single-sided inspection followed by flipping the circuit board to inspect the other side. This flipping double-sided visual inspection method can easily lead to problems such as position offset and wrinkles when the circuit board is flipped, resulting in inaccurate visual inspection of the circuit board. In addition, during the visual inspection process, it is necessary to wait for the flipping process to be completed. Therefore, the efficiency of double-sided visual inspection of the circuit board needs to be improved. Summary of the invention

[0004] In view of the above problems, an embodiment of the present application provides a double-sided visual inspection device for an FPC circuit board to solve the technical problems in the related art.

[0005] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: a double-sided visual inspection device for FPC circuit boards, comprising: two fixing frames and two supporting groups, wherein the two fixing frames are connected by supporting legs and three supporting frames are evenly arranged along the length direction of the fixing frames.

[0006] The supporting group consists of a supporting frame and a cross supporting steel wire installed on its inner wall. A circular card slot is provided at the bottom of the supporting frame, which is used to cooperate with the supporting frame for support. The four side walls of the inner wall of the supporting frame are provided with storage slots running through the top thereof.

[0007] Two adsorption and placement mechanisms are arranged symmetrically along the length direction between the two fixing frames. The adsorption and placement mechanisms cooperate with the supporting frame to pick up and place the circuit board. A double-sided visual inspection mechanism is arranged between the middle parts of the two fixing frames and is aligned with the supporting frame located in the middle.

[0008] In one possible implementation, the double-sided visual inspection mechanism includes image acquisition modules that are symmetrically arranged upper and lower and installed between two fixed frames, and a support frame located in the middle is located between the upper and lower image acquisition modules. The image acquisition modules are connected to an existing image detection and display device to inspect the circuit board.

[0009] The adsorption and placing mechanism comprises a circular frame, a suction and placing group for driving the supporting frame to move is arranged at the bottom of the circular frame, a cavity plate is installed on the four side walls inside the circular frame through an elastic component, a suction seat connected with it is installed at the bottom of the cavity plate, the suction seat is a cavity structure and corresponds to the storage groove one by one, a rubber sealing sheet is installed at the bottom of the suction seat, a uniformly arranged suction hole one is opened at the bottom of the suction seat near the side away from the circular frame, the suction hole one penetrates the rubber sealing sheet, a connecting cavity plate corresponding to the cavity plate one by one is installed at the top of the circular frame, a plurality of flexible tubes connected and uniformly arranged are installed between the connecting cavity plate and the corresponding cavity plate, a pulling and leveling group for cooperating with the elastic component to level the circuit board is installed between the storage groove and the adsorption seat, a blocking member cooperating with the suction hole one to adsorb and fix the supporting frame is installed in the storage groove, and the blocking member is a blocking block connected to the side of the cross supporting steel wire in the storage groove.

[0010] A pick-and-place driving mechanism is installed between the two fixing frames to drive the two adsorption pick-and-place mechanisms to drive the two supporting groups to be alternately placed on the supporting frame located in the middle.

[0011] In one possible implementation, the elastic component includes a plurality of accommodating holes that are opened on the inner wall of the circular frame and are evenly arranged, a plug rod that is slidably plugged into the accommodating holes is fixedly installed on the cavity plate, and a reset spring that is evenly arranged and sleeved on the corresponding plug rod is installed between the cavity plate and the inner wall of the circular frame.

[0012] In one possible implementation, the pulling and leveling group includes a through groove opened at the bottom of the storage groove and passing through the supporting frame. Except for the support frame located in the middle, the tops of the other two support frames are equipped with push plates corresponding to the through grooves one by one. The top of the push plate is rotatably connected to a top roller, and a wedge-shaped strip matching the push plate is installed on the end face of the adsorption seat close to the connecting cavity plate.

[0013] In one possible implementation, the adsorption and lifting group includes an adsorption fixing frame installed at the bottom of the circular frame, a connecting groove connecting the adsorption fixing frame with a connecting cavity plate is provided on the circular frame, the adsorption fixing frame is a circular cavity structure, a rubber sealing strip is installed at the bottom of the adsorption fixing frame, a plurality of adsorption holes 2 that are evenly arranged and penetrate the rubber sealing strip are provided at the bottom of the adsorption fixing frame, and a circular groove is provided at the top of the supporting frame.

[0014] In a possible implementation, the top of the support frame is in an arc shape, and the top of the circular slot is in an arc shape.

[0015] In one possible implementation, except for the support frame located in the middle, the inner wall of the support frame is installed with four supporting blocks arranged in a matrix, and the supporting blocks and the rectangular spaces formed between the cross supporting steel wires and the inner wall of the support frame correspond one to one.

[0016] In a possible implementation, a gasket made of glass is fixedly mounted on the bottom of the circular groove.

[0017] In one possible implementation, the pick-and-place drive mechanism includes guide grooves provided on opposite surfaces of two fixed frames, a sliding seat is slidably connected in the guide groove, a connecting seat is installed on a connecting cavity plate on the circular frame close to one side of the fixed frame, a lifting frame that slides up and down is installed on the sliding seat, and the lifting frame is fixedly connected to its two adjacent connecting seats.

[0018] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects:

[0019] 1. The double-sided visual inspection device for FPC circuit boards designed by the present invention cooperates with two supporting groups, two adsorption and placement mechanisms, and a double-sided visual inspection mechanism, which can not only drive the circuit board to move stably, but also support the circuit board through a cross supporting steel wire and perform visual inspection on the upper and lower sides of the circuit board at the same time, thereby avoiding the problem of inaccurate visual inspection caused by circuit board deviation that is easily caused when flipping the circuit board, shortening the time of visual inspection, reducing potential errors, improving precision and accuracy, and achieving a higher degree of automation.

[0020] 2. The pulling and leveling group in the present invention cooperates with the elastic component, so that the four adsorption seats pull the four upper end surface edges of the circuit board through the adsorption holes, which not only prevents the circuit board from shaking during movement, but also can level the circuit board to prevent wrinkles on the circuit board that affect the accuracy of visual inspection.

[0021] 3. After the adsorption and placement mechanism in the present invention places the supporting frame on the support frame of the inspection station, when the adsorption seat no longer adsorbs and pulls the circuit board, the circuit board moves into the storage groove under the pull of the reset elastic force of the reset spring, thereby avoiding the adsorption seat from blocking the circuit board and affecting the accuracy and comprehensiveness of visual inspection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0024] Figure 2 It is a three-dimensional structural schematic diagram of the supporting group and the adsorption and placement mechanism of the present invention.

[0025] Figure 3 It is a three-dimensional structural schematic diagram of the supporting group, the supporting frame and the supporting block of the present invention.

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the supporting group of the present invention.

[0027] Figure 5 The present invention Figure 1 Main sectional view.

[0028] Figure 6 The present invention Figure 5 Enlarged view of point A in .

[0029] Reference numerals:

[0030] 1. Fixing frame; 2. Supporting group; 20. Supporting frame; 21. Cross supporting steel wire; 22. Reciprocating slot; 23. Storage slot; 230. Blocking block; 3. Supporting leg; 4. Supporting frame; 40. Supporting block; 5. Adsorption and placement mechanism; 50. Reciprocating frame; 51. Adsorption and placement group; 510. Adsorption fixing frame; 511. Rubber sealing strip; 512. Reciprocating groove; 501. Gasket; 52. Elastic component; 520. Accommodation hole; 521. Insert Rod; 522, reset spring; 53, cavity plate; 54, adsorption seat; 55, rubber sealing sheet; 56, connecting cavity plate; 57, flexible tube; 58, pulling and leveling group; 580, through groove; 581, push plate; 582, wedge strip; 583, top roller; 6, double-sided visual inspection mechanism; 60, image acquisition module; 7, circuit board; 8, pick-and-place drive mechanism; 80, guide groove; 81, connecting seat; 82, lifting frame; 83, sliding seat. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] See also Figure 1 A double-sided visual inspection device for FPC circuit boards includes: two fixing frames 1 and two supporting groups 2, wherein the two fixing frames 1 are connected to three supporting frames 4 evenly arranged along the length direction of the fixing frames 1 through supporting legs 3.

[0034] See also Figure 1 , Figure 4 and Figure 6 The supporting group 2 is composed of a supporting frame 20 and a cross supporting steel wire 21 installed on its inner wall. The cross supporting steel wire 21 is a cross plate frame with a thickness of 0.2 mm-3 mm, and its thickness can be ignored during the detection process. A circular card slot 22 is opened at the bottom of the supporting frame 20, and the circular card slot 22 is used to cooperate with the supporting frame 4 for support. The four side walls of the inner wall of the supporting frame 20 are all provided with a storage groove 23 running through the top thereof.

[0035] See also Figure 1 and Figure 5 Two adsorption and placement mechanisms 5 symmetrically arranged along the length direction are arranged between the two fixing frames 1. The adsorption and placement mechanisms 5 cooperate with the supporting frame 20 to take and place the circuit board 7. A double-sided visual inspection mechanism 6 aligned with the supporting frame 4 located in the middle is arranged between the two fixing frames 1.

[0036] The two supporting groups 2 correspond to the two adsorption and placement mechanisms 5 one by one. The two adsorption and placement mechanisms 5 alternately drive the two supporting groups 2 with the circuit boards 7 to move to the support frame 4 located in the middle, and the upper and lower surfaces of the circuit board 7 are photographed and inspected by the double-sided visual inspection mechanism 6. Since the thickness of the cross supporting steel wire 21 is extremely thin, the obstruction of the circuit board 7 by the cross supporting steel wire 21 can be ignored during this process, so that the upper and lower sides of the circuit board 7 can be visually inspected at the same time without flipping the circuit board 7, which not only greatly shortens the inspection time, but also reduces potential errors, improves precision and accuracy, and achieves a higher degree of automation.

[0037] See also Figure 1 and Figure 5 The double-sided visual inspection mechanism 6 includes an image acquisition module 60 symmetrically arranged in an upper and lower manner installed between two fixing frames 1, and the support frame 4 located in the middle is located between the upper and lower image acquisition modules 60. The image acquisition module 60 is connected to the existing image detection and display device to detect the circuit board 7.

[0038] See also Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6The adsorption and placing mechanism 5 includes a circular frame 50, and a suction and placing group 51 for driving the supporting frame 20 to move is arranged at the bottom of the circular frame 50. A cavity plate 53 is installed on the four side walls inside the circular frame 50 through an elastic component 52. A suction seat 54 connected to the cavity plate 53 is installed at the bottom of the cavity plate 53. The suction seat 54 is a cavity structure and corresponds to the storage groove 23 one by one. A rubber sealing sheet 55 is installed at the bottom of the suction seat 54. The bottom of the suction seat 54 is close to the side away from the circular frame 50 and is provided with uniformly arranged suction holes one. The suction holes one penetrate the rubber sealing sheet 55. The rubber sealing sheet 55 is used to improve the suction hole pair when the circuit board 7 is adsorbed. In order to improve the sealing performance and adsorption stability between the two, a connecting cavity plate 56 corresponding to the cavity plate 53 is installed on the top of the circular frame 50, and a plurality of flexible tubes 57 connected and evenly arranged are installed between the connecting cavity plate 56 and the corresponding cavity plate 53, one of which is connected to an external adsorption device (such as an air pump), and a pulling and leveling group 58 is installed between the storage groove 23 and the adsorption seat 54 for cooperating with the elastic component 52 to level the circuit board 7, and a blocking member is installed in the storage groove 23 for cooperating with the adsorption hole 1 to adsorb and fix the supporting frame 20, and the blocking member is a blocking block 230 connected to the side of the storage groove 23 close to the cross supporting steel wire 21.

[0039] The support frame 4 located in the middle is a detection station, and the other two support frames 4 are pick-up and placement stations. The two adsorption pick-up and placement mechanisms 5 are always located above the corresponding supporting groups 2.

[0040] In the initial state, the elastic component 52 is in a contracted state, and the cavity plate 53 and the adsorption seat 54 are close to the circular frame 50. At this time, the distance between the two relative adsorption seats 54 is greater than the distance between the two corresponding inner walls of the supporting frame 20, so that the circuit board 7 can be completely in an unobstructed exposed state during the subsequent visual inspection and shooting (except for the negligible obstruction of the circuit board 7 by the cross supporting steel wire 21), and the upper and lower sides of the circuit board 7 can be comprehensively visually inspected at the same time, thereby improving the inspection efficiency and not affecting the accuracy of the visual inspection of the circuit board 7.

[0041] See also Figure 1 A pick-and-place driving mechanism 8 is installed between the two fixing frames 1 to drive the two adsorption pick-and-place mechanisms 5 to drive the two supporting groups 2 to be alternately placed on the supporting frame 4 located in the middle.

[0042] The circuit board 7 is adsorbed and placed on the support frame 20 located on the pick-and-place station by the adsorption manipulator from above the support frame 20 and the adsorption and placement mechanism 5. The cross supporting wire 21 in the support frame 20 supports the lower end surface of the circuit board 7. Then the pick-and-place drive mechanism 8 drives the circular frame 50 to move downward. Before this, the adsorption seat 54 and its corresponding storage groove 23 are aligned up and down. The circular frame 50 drives the adsorption and lifting group 51 and the adsorption seat 54 to move downward. During the downward movement of the circular frame 50, the pulling and leveling group 58 cooperates with the elastic component 52 to move toward the cross supporting wire 21 until the adsorption and lifting group 51 and the support frame 20 are tightly matched. At this time, the adsorption seat 54 moves away from the end of the circular frame 50 to above the corresponding end of the cross supporting wire 21, and the adsorption hole on the adsorption seat 54 is located at the upper edge of the circuit board 7. On the end surface, at this time, the external adsorption device adsorbs the four edges of the circuit board 7 through the adsorption holes on the connecting cavity plate 56, the flexible tube 57, the cavity plate 53 and the adsorption seat 54, so as to avoid the circuit board 7 from shaking when the supporting frame 20 and the circuit board 7 are moved, resulting in the change of the position of the circuit board 7 and affecting the accuracy of visual inspection. At the same time, the adsorption and lifting group 51 adsorbs and fixes the supporting frame 20, and then the pick-and-place drive mechanism 8 drives the circular frame 50 to move upward, the pulling and leveling group 58 no longer pushes the adsorption seat 54, and the elastic component 52 pulls the adsorption seat 54 toward the inner wall of the circular frame 50. The four adsorption seats 54 pull the four upper end surface edges of the circuit board 7 through their respective adsorption holes, which not only avoids the shaking of the circuit board 7 during the movement, but also levelizes the circuit board 7 again to avoid the wrinkles on the circuit board 7 affecting the accuracy of visual inspection.

[0043] Afterwards, the adsorption and placement mechanism 5 drives the supporting frame 20 with the circuit board 7 to move to the support frame 4 on the inspection station under the driving action of the placement drive mechanism 8, and then the external adsorption device stops working, and the adsorption seat 54 does not adsorb the circuit board 7, so that the circuit board 7 is only supported by the cross supporting steel wire 21. The adsorption seat 54 is reset under the action of the elastic component 52 and moves from the upper end surface of the circuit board 7 to the upper end surface of the blocking block 230, so that the circuit board 7 is in a completely unobstructed state. Afterwards, the double-sided visual inspection mechanism 6 quickly performs visual inspection on the upper and lower end surfaces of the circuit board 7, and the adsorption seat 54 moves from the circuit board 7 to the blocking block 230, so that when the supporting frame 20 is adsorbed and fixed again, the blocking block 230 blocks the adsorption hole 1 at the bottom of the adsorption seat 54, so that the adsorption and lifting group 51 connected to the adsorption seat 54 can adsorb and lift the supporting frame 20.

[0044] During the inspection process, another pick-and-place station is removing the circuit board 7 after inspection and placing the circuit board 7 to be inspected on the corresponding support frame 20 to prepare for the next inspection, so that time is fully utilized and the visual inspection efficiency of the circuit board 7 is greatly improved.

[0045] See also Figure 6 The elastic component 52 includes a plurality of accommodating holes 520 that are opened on the inner wall of the circular frame 50 and are evenly arranged. An insertion rod 521 that is slidably plugged into the accommodating holes 520 is fixedly installed on the cavity plate 53. A return spring 522 that is evenly arranged and sleeved on the corresponding insertion rod 521 is installed between the cavity plate 53 and the inner wall of the circular frame 50.

[0046] See also Figure 4 and Figure 6 The pulling and leveling group 58 includes a through groove 580 opened at the bottom of the storage groove 23 and penetrating the supporting frame 20. Except for the support frame 4 located in the middle, the tops of the other two support frames 4 are equipped with push plates 581 corresponding to the through groove 580 one by one. The top of the push plate 581 is rotatably connected with a top roller 583, and the end surface of the adsorption seat 54 close to the connecting cavity plate 56 is equipped with a wedge strip 582 that matches the push plate 581.

[0047] When the circular frame 50 drives the adsorption seat 54 to move downward, the inclined surface of the wedge-shaped bar 582 contacts the top roller 583 on the top of the push plate 581, and the adsorption seat 54 moves toward the cross supporting wire 21 under the action of the thrust force. At this time, the reset spring 522 is stretched, and the insertion rod 521 moves along the accommodating hole 520 until the adsorption hole 1 on the adsorption seat 54 is located on the upper end surface at the edge of the circuit board 7; thereafter, when the adsorption and placement mechanism 5 drives the supporting frame 20 to move upward, the push plate 581 moves out of the through groove 580, and the reset spring 522 pulls the adsorption seat 54 toward the inner wall of the circular frame 50 under the action of the elastic reset force, and the four adsorption seats 54 pull the four upper end surface edges of the circuit board 7 through their corresponding adsorption holes, and the circuit board 7 is leveled to prevent wrinkles on the circuit board 7 from affecting the accuracy of line visual inspection.

[0048] After the adsorption and placement mechanism 5 places the supporting frame 20 on the support frame 4 of the inspection station, and the adsorption seat 54 no longer adsorbs and pulls the circuit board 7, the adsorption seat 54 moves into the storage groove 23 under the action of the reset elastic force of the reset spring 522, thereby preventing the adsorption seat 54 from blocking the circuit board 7.

[0049] See also Figure 6 The adsorption and lifting group 51 includes an adsorption fixing frame 510 installed at the bottom of the circular frame 50. A connecting groove is provided on the circular frame 50 to connect the adsorption fixing frame 510 with the connecting cavity plate 56. The adsorption fixing frame 510 is a circular cavity structure. A rubber sealing strip 511 is installed at the bottom of the adsorption fixing frame 510. A plurality of adsorption holes 2 are evenly arranged and penetrate the rubber sealing strip 511 at the bottom of the adsorption fixing frame 510. A circular groove 512 is provided at the top of the supporting frame 20.

[0050] When the circular frame 50 moves downward, it drives the adsorption fixing frame 510 to be inserted into the circular groove 512 until the rubber sealing strip 511 at the bottom of the adsorption fixing frame 510 is tightly pressed against the circular groove 512. When the external adsorption device is started, the adsorption fixing frame 510 is adsorbed on the circular groove 512 through the adsorption hole 2, thereby driving the supporting frame 20 to move. The rubber sealing strip 511 is used to improve the sealing between the fixing frame 510 and the circular groove 512 during adsorption.

[0051] See also Figure 6 The top of the support frame 4 is in an arc shape, and the top of the round-shaped slot 22 is in an arc shape, so that when the supporting frame 20 is placed on the support frame 4, the support frame 4 can be inserted into the round-shaped slot 22.

[0052] See also Figure 3 In addition to the support frame 4 located in the middle, the inner wall of the support frame 4 is installed with four supporting blocks 40 arranged in a matrix. The supporting blocks 40 and the rectangular spaces formed between the cross supporting steel wires 21 and the inner wall of the supporting frame 20 correspond one to one. The supporting blocks 40 cooperate with the cross supporting steel wires 21 to support the circuit board 7 adsorbed and placed on the supporting frame 20 and the cross supporting steel wires 21 by the external adsorption manipulator, thereby improving the supporting force of the circuit board 7 when it is placed, so that the pulling and leveling group 58 cooperates with the elastic component 52 and the adsorption seat 54 to adsorb and level the circuit board 7, and will not affect the subsequent visual inspection of the circuit board 7.

[0053] See also Figure 6 A glass gasket 501 is fixedly installed at the bottom of the circular groove 512. The gasket 501 cooperates with the adsorption hole 2. Through the smooth characteristics of the gasket 501, the adsorption and fixing force of the adsorption and fixing frame 510 on the supporting frame 20 is improved.

[0054] See also Figure 1 and Figure 5 The pick-and-place drive mechanism 8 includes guide grooves 80 provided on opposite surfaces of the two fixed frames 1, a sliding seat 83 is slidably connected in the guide groove 80, a connecting seat 81 is installed on the connecting cavity plate 56 on the side of the circular frame 50 close to the fixed frame 1, and a lifting frame 82 that slides up and down is installed on the sliding seat 83, and the lifting frame 82 is fixedly connected to its two adjacent connecting seats 81.

[0055] The sliding seat 83 is connected to the existing sliding drive source (such as an electric slider), and the lifting frame 82 is connected to the existing lifting drive source (such as an electric slider). The sliding seat 83 drives the adsorption and placement mechanism 5 to move horizontally through the lifting frame 82 and the connecting seat 81, and the lifting frame 82 drives the adsorption and placement mechanism 5 to move up and down on the sliding seat 83 through the connecting seat 81.

[0056] During operation, the circuit board 7 is adsorbed from above the supporting frame 20 and the adsorption and placement mechanism 5 by the adsorption manipulator and placed on the supporting frame 20 located on the placement station. The cross supporting wire 21 in the supporting frame 20 supports the lower end surface of the circuit board 7. Then the placement drive mechanism 8 drives the adsorption and placement mechanism 5 to move downward until the adsorption and placement group 51 is tightly fitted with the supporting frame 20. The adsorption hole 1 on the adsorption seat 54 is located on the upper end surface at the edge of the circuit board 7. At this time, the adsorption hole 1 adsorbs the four edges of the circuit board 7 to prevent the circuit board 7 from shaking when the supporting frame 20 and the circuit board 7 are moved later.

[0057] At the same time, the adsorption and lifting group 51 adsorbs and fixes the supporting frame 20, and then the pick-and-place drive mechanism 8 drives the circular frame 50 to move upward, the pulling and leveling group 58 no longer pushes the adsorption seat 54, and the elastic component 52 pulls the adsorption seat 54 toward the inner wall of the circular frame 50. The four adsorption seats 54 pull the four upper end surface edges of the circuit board 7 through their respective adsorption holes, which not only prevents the circuit board 7 from shaking during the movement, but also leveled the circuit board 7 again to prevent wrinkles on the circuit board 7 from affecting the accuracy of visual inspection.

[0058] Afterwards, the adsorption and placement mechanism 5 drives the supporting frame 20 with the circuit board 7 to move to the support frame 4 on the inspection station under the driving action of the pick-and-place drive mechanism 8, and then the external adsorption device stops working, and the adsorption seat 54 no longer adsorbs the circuit board 7, so that the circuit board 7 is only supported by the cross supporting steel wire 21. The adsorption seat 54 is reset and moved away from the upper end surface of the circuit board 7 under the action of the elastic component 52, so that the circuit board 7 is in an unobstructed state, and then the upper and lower end surfaces of the circuit board 7 are visually inspected by the double-sided visual inspection mechanism 6.

[0059] During the inspection process, another pick-and-place station is removing the circuit board 7 after inspection and placing the circuit board 7 to be inspected on the corresponding supporting frame 20 in preparation for the next inspection, so that time is fully utilized and the visual inspection efficiency of the circuit board 7 is greatly improved.

[0060] After the visual inspection of the circuit board 7 on the inspection station is completed, the adsorption and placement mechanism 5 on the inspection station drives the supporting group 2 on the inspection station to move to the support frame 4 located at the placement station, and then the circuit board 7 after inspection is removed by the robot, and the next circuit board 7 to be inspected is placed.

[0061] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0062] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-sided visual inspection device for FPC circuit boards, characterized in that: include: Two fixing frames (1) and two supporting groups (2), the two fixing frames (1) are connected to three supporting frames (4) evenly arranged along the length direction of the fixing frames (1) through supporting legs (3); the supporting group (2) is composed of a supporting frame (20) and a cross supporting steel wire (21) installed on the inner side wall thereof, a circular card slot (22) is provided at the bottom of the supporting frame (20), and the circular card slot (22) is used for card-release support cooperation with the supporting frame (4), and the four side walls of the inner wall of the supporting frame (20) are all provided with a storage slot (23) penetrating the top thereof; Two adsorption and placement mechanisms (5) are arranged symmetrically along the length direction of the two fixing frames (1), and the adsorption and placement mechanisms (5) cooperate with the supporting frame (20) to be used for taking and placing the circuit board (7). A double-sided visual inspection mechanism (6) is arranged between the middle parts of the two fixing frames (1) and is aligned with the supporting frame (4) located in the middle. The adsorption and placing mechanism (5) comprises a circular frame (50), the bottom of which is provided with an adsorption and placing group (51) for driving the supporting frame (20) to move, four side walls on the inner side of the circular frame (50) are all provided with cavity plates (53) through elastic components (52), the bottom of the cavity plate (53) is provided with an adsorption seat (54) connected thereto, the adsorption seat (54) is a cavity structure and corresponds one to one with the receiving groove (23), the bottom of the adsorption seat (54) is provided with a rubber sealing sheet (55), the bottom of the adsorption seat (54) is open near the side away from the circular frame (50), and the adsorption seat (54) is provided with a rubber sealing sheet (55). A uniformly arranged adsorption hole (1) is provided, the adsorption hole (1) penetrates the rubber sealing sheet (55), a connecting cavity plate (56) corresponding to the cavity plate (53) is installed on the top of the circular frame (50), a plurality of connected and uniformly arranged flexible tubes (57) are installed between the connecting cavity plate (56) and the corresponding cavity plate (53), a pulling and leveling group (58) is installed between the storage groove (23) and the adsorption seat (54) for cooperating with the elastic component (52) to level the circuit board (7), and a blocking member is installed in the storage groove (23) for cooperating with the adsorption hole (1) to adsorb and fix the support frame (20); A pick-and-place drive mechanism (8) is installed between the two fixing frames (1) to drive the two adsorption pick-and-place mechanisms (5) to drive the two supporting groups (2) to be alternately placed on the support frame (4) located in the middle.

2. According to claim 1, a double-sided visual inspection device for FPC circuit boards, characterized in that: The pulling and leveling group (58) includes a through groove (580) opened at the bottom of the storage groove (23) and passing through the supporting frame (20). Except for the support frame (4) located in the middle, the tops of the other two support frames (4) are equipped with push plates (581) corresponding to the through grooves (580) one by one. The top of the push plate (581) is rotatably connected to a top roller (583), and the end face of the adsorption seat (54) close to the connecting cavity plate (56) is equipped with a wedge strip (582) that matches the push plate (581).

3. According to claim 1, a double-sided visual inspection device for FPC circuit boards, characterized in that: The pick-and-place drive mechanism (8) comprises guide grooves (80) provided on opposite surfaces of two fixed frames (1), a sliding seat (83) being slidably connected in the guide grooves (80), a connecting seat (81) being installed on a connecting cavity plate (56) on a side of the circular frame (50) close to the fixed frame (1), a lifting frame (82) being installed on the sliding seat (83) and being slidable up and down, and the lifting frame (82) being fixedly connected to two adjacent connecting seats (81).

4. According to claim 1, a double-sided visual inspection device for FPC circuit boards, characterized in that: The adsorption and lifting group (51) comprises an adsorption fixing frame (510) installed at the bottom of the circular frame (50); a connecting groove for connecting the adsorption fixing frame (510) with a connecting cavity plate (56) is provided on the circular frame (50); the adsorption fixing frame (510) is a circular cavity structure; a rubber sealing strip (511) is installed at the bottom of the adsorption fixing frame (510); a plurality of adsorption holes (2) are evenly arranged and penetrate the rubber sealing strip (511) at the bottom of the adsorption fixing frame (510); and a circular groove (512) is provided at the top of the supporting frame (20).

5. According to claim 1, a double-sided visual inspection device for FPC circuit boards, characterized in that: The elastic component (52) comprises a plurality of receiving holes (520) which are opened on the inner side wall of the circular frame (50) and are evenly arranged, a plug rod (521) which is slidably plugged into the receiving holes (520) is fixedly mounted on the cavity plate (53), and a return spring (522) which is evenly arranged and sleeved on the corresponding plug rod (521) is mounted between the cavity plate (53) and the inner side wall of the circular frame (50).

6. According to claim 1, a double-sided visual inspection device for FPC circuit boards, characterized in that: The double-sided visual inspection mechanism (6) comprises image acquisition modules (60) which are symmetrically arranged in an upper and lower manner and installed between two fixing frames (1), and a support frame (4) located in the middle is located between the upper and lower image acquisition modules (60).

7. The FPC circuit board double-sided visual inspection device according to claim 1, characterized in that: In addition to the support frame (4) located in the middle, the inner wall of the support frame (4) is installed with four support blocks (40) arranged in a matrix, and the support blocks (40) and the rectangular spaces formed between the cross support steel wires (21) and the inner wall of the support frame (20) correspond one to one.

8. The double-sided visual inspection device for FPC circuit boards according to claim 4, characterized in that: A gasket (501) made of glass is fixedly mounted on the bottom of the circular groove (512).

9. The double-sided visual inspection device for FPC circuit boards according to claim 1, characterized in that: The top of the support frame (4) is in an arc shape, and the top of the circular card slot (22) is in an arc shape.

10. The double-sided visual inspection device for FPC circuit boards according to claim 1, characterized in that: The blocking member is a blocking block (230) connected to a side of the receiving groove (23) close to the cross supporting steel wire (21).

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