Missed cutting prevention circuit board, detection method and detection device

Abstract

The invention discloses a missing cutting prevention circuit board, a detection method and a detection device, and relates to the technical field of circuit boards. According to the circuit board, the S-shaped test line is arranged on the cutting groove, and the S-shaped test line comprises a plurality of wires penetrating through the cutting position, so that when any wire is cut off by the cutting groove (the S-shaped test line is not conducted), a circuit is in an open circuit state (indicating that the cutting of the cutting groove on the circuit board meets the requirement) during testing; compared with a traditional mode that only one wire penetrates through the cutting position, the situation that due to the fact that copper foils of the two cut-off wires make contact by mistake, a circuit is connected in the detection process, and then false alarms are generated can be well avoided, and the detection accuracy is improved; the S-shaped test line is matched with the detection circuit to detect cutting of the circuit board, traditional manual visual detection is replaced, and the detection efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit boards, and in particular to an anti-missing-cut circuit board, a detection method and a detection device. Background Art

[0002] During the PCB production process, all assembled circuit boards must be segmented to facilitate customer plug-in assembly and board separation. However, in actual operation, if circuit boards are not segmented, it is extremely difficult to detect during inspection, resulting in a decrease in yield rate, defective products, customer complaints, and unnecessary losses for the company. When inspecting the cutting condition of the cutting groove, manual visual inspection is mostly used. However, this manual visual inspection method has a high probability of missed detection and false detection. In addition, the use of manual visual inspection also increases the length of the inspection process, which not only makes it impossible to guarantee the yield rate of the circuit board, but also reduces the production efficiency of the circuit board.

[0003] Therefore, how to accurately and efficiently detect the cutting grooves of circuit boards has become a technical problem that needs to be solved urgently in the field of circuit boards. Summary of the Invention

[0004] The purpose of the present invention is to provide a circuit board, a detection method and a detection device to prevent missed cutting, aiming to improve the current problem of low accuracy and low efficiency in detecting cutting grooves of circuit boards.

[0005] In order to achieve the above-mentioned object, the embodiment of the present application provides a circuit board for preventing leaking cuts, comprising: A plate body, wherein the plate body has a waste area and an effective area, a cutting position is formed between the waste area and the effective area, and a cutting groove is formed by cutting along the cutting position; An S-shaped test line is provided at the cutting position and extends along the length of the cutting groove; the cutting position divides the S-shaped test line into a first line body and a second line body in a direction perpendicular to the length of the cutting groove; one of the first line body and the second line body is located in the effective area, and the other is located in the waste area; and There are two test points, which are respectively arranged at two ends of the S-shaped test line in the length direction, and the test points are electrically connected to the S-shaped test line.

[0006] In one embodiment, the two test points are both located in the waste area; or Both of the test points are located in the effective area; or One of the two test points is located in the effective area, and the other is located in the waste area.

[0007] In one embodiment, there are a plurality of S-shaped test lines, and the plurality of S-shaped test lines are arranged at intervals along the length direction of the cutting position.

[0008] In one embodiment, the S-shaped test line includes at least four conductors, and the at least four conductors are connected end to end in sequence.

[0009] The present application provides a detection device for detecting the circuit board for preventing leaking cuts in the above embodiment. The detection device has a Z-direction extending vertically, and includes: A frame having a detection position for placing a plate; The detection component is connected to the frame for movement along the Z direction. The detection component has a detection head that can move along the Z direction. The detection head is arranged corresponding to the test point and is elastically connected to the detection component.

[0010] In one embodiment, the detection component includes: A lifting plate, connected to the frame and movable along the Z direction; and A first cylinder is provided on the upper end surface of the lifting plate; A first valve plate, movable along the Z direction, is disposed within the first cylinder, and the first valve plate is elastically connected to the first cylinder; Two detection probes are provided, and the two detection probes are connected to one end of the first valve plate extending downward from the first cylinder; in the Z direction, the two detection probes pass through the lifting plate and do not contact the lifting plate, and the detection probes constitute the detection head; The electric control component is electrically connected to the detection probe.

[0011] In one embodiment, the detection device further comprises: a second cylinder, provided on the upper end surface of the lifting plate; and a second valve plate, movable along the Z direction and connected to the second cylinder, and the second valve plate is elastically connected to the second cylinder; a first tube having a first end communicating with the top of the first cylinder and a second end communicating with the top of the second cylinder; a cleaning pipe having a third end communicating with the top of the second cylinder and a purge end extending downward and passing through the lifting plate; a first valve, provided on the cleaning pipe, for controlling the on-off of the cleaning pipe; A one-way valve is arranged on the top of the first cylinder.

[0012] In one embodiment, the detection device further comprises: a third cylinder, provided on the upper end surface of the lifting plate; and A third valve plate is connected to the third cylinder body for movement along the Z direction, and the third valve plate is elastically connected to the third cylinder body; the third valve plate is driven by a marking member, and in the Z direction, the marking member downwardly penetrates the lifting plate; a second tube having a fourth end communicating with the top of the second cylinder and a fifth end communicating with the top of the third cylinder; a second valve, provided on the second pipe, for controlling the on-off of the second pipe; The third valve is arranged on the top of the third cylinder.

[0013] In one embodiment, the frame has a detection platform, and the upper end surface of the detection platform constitutes the detection position.

[0014] The present embodiment provides a detection method for detecting the circuit board for preventing leaking cuts in the above embodiment, comprising the following steps: S1: first, cutting the plate along the cutting position to form the cutting groove on the plate; S2: In the Z direction, the detection component is driven to move downward so that the detection head abuts against the test point; if the S-shaped test line is open, it indicates that the cutting groove cutting process is normal; if the S-shaped test line is short-circuited, it indicates that the cutting groove cutting process is abnormal.

[0015] Compared with the prior art, the embodiments of the present invention provide a circuit board, detection method, and detection device for preventing leaked cutting. The advantages are as follows: the present application provides an S-shaped test line on the cutting groove. Since the S-shaped test line includes multiple conductors arranged through the cutting position, as long as any conductor is cut by the cutting groove (the S-shaped test line is no longer conductive), the circuit is in an open circuit state during testing (indicating that the cutting of the cutting groove on the circuit board meets the cutting requirements); compared with the traditional method of only providing one conductor passing through the cutting position, the S-shaped test line can be better prevented from contacting the exposed copper foil at both ends of the cutting groove (cutting waste with conductive properties overlaps the exposed copper foil at both ends, causing the S-shaped test line to be conductive) and, during detection, the circuit is displayed as being in a short circuit state, thereby generating false alarms, thereby improving the accuracy of detection; the present application uses the S-shaped test line in conjunction with the detection circuit to detect the cutting of the circuit board, replacing the traditional manual visual inspection, and further improving the detection efficiency; the present solution is suitable for assembly line detection and optimizes the automated detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the plate structure according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a detection device in a working position according to an embodiment of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the structure at center A; Figure 4 For the present invention Figure 2 A diagram of another state after the structure at point A is enlarged; Figure 5 This is a schematic diagram of a detection device in an initial position according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the detection assembly and the frame being separated according to an embodiment of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point B in the middle; Figure 8 This is a bottom-up structural diagram of a detection assembly according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the cross-sectional structure of the second cylinder and the third cylinder in one embodiment of the present invention.

[0017] In the figure, 1, plate body; 11, waste area; 12, effective area; 13, cutting groove; 14, guide hole; 2. S-shaped test line; 21. First line body; 22. Second line body; 3. Test point; 4. Frame; 41. Test bench; 411. Stop column; 42. Mounting plate; 43. Guide column; 44. Base; 5. Detection assembly; 51. Lifting plate; 52. First cylinder; 53. First valve plate; 54. Detection probe; 6. Cleaning assembly; 61. Second cylinder; 62. Second valve plate; 63. First pipe; 64. Cleaning pipe; 65. First valve; 66. One-way valve; 67. Nozzle; 7. Marking assembly; 71. Third cylinder; 711. Third valve; 72. Third valve plate; 73. Marking member; 74. Second tube; 75. Second valve; 8. Electric linear actuator. DETAILED DESCRIPTION

[0018] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as blocking the present invention. It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms. These terms are only used to distinguish information of the same type from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0020] During the PCB production process, all assembled circuit boards must be split to facilitate customer debonding after plug-in (cutting grooves are cut in the assembled circuit boards in advance, and when customers subsequently debond the boards, they only need to use a little force to disconnect the circuit boards at the cutting grooves and complete the debonding). However, in the actual operation process, if the circuit boards are not debonded, it is extremely difficult to detect them during inspection, resulting in a decrease in the yield rate, the outflow of defective products, and customer complaints, which brings unnecessary losses to the company. When inspecting the cutting conditions of the cutting grooves, most of the current methods use manual visual inspection, but this manual visual inspection method has a high probability of missed detection and false detection, and the use of manual visual inspection also increases the length of the inspection process, which not only makes it impossible to guarantee the yield rate of the circuit boards, but also reduces the production efficiency of the circuit boards. Based on the above embodiments of the present application, a circuit board with anti-missing cutting is provided to solve the above problems.

[0021] Reference Figure 1 As shown, in the first aspect, the embodiment of the present application proposes an anti-missing cutting circuit board, including a board body 1, an S-shaped test line 2, and a test point 3; wherein the board body 1 has a waste area 11 and an effective area 12, a cutting position is formed between the waste area 11 and the effective area 12, and a cutting groove 13 is formed by cutting along the cutting position; Figure 1 As shown, a spliced circuit board is shown, which includes several sub-boards. After the spliced circuit board is cut and separated, the effective area 12 forms the sub-board, and the waste area 11 is cut away and separated from the sub-board.

[0022] The S-shaped test line 2 is provided in the conductor layer in the board body 1, and the S-shaped test line 2 is arranged on the cutting position; the cutting position is located on the side of each effective area 12, and when the spliced circuit board is cut, cutting is performed along the above-mentioned cutting position, thereby forming a cutting groove 13 at the cutting position; Figure 1As shown in the partially enlarged view, after the cutting is completed at the cutting position, the cutting groove 13 divides the S-shaped test line 2 into a first line body 21 and a second line body 22, and one of the first line body 21 and the second line body 22 is located in the effective area 12 and the other is located in the waste area 11; that is, the cutting groove 13 extends along the length of the S-shaped test line 2, dividing the S-shaped test line 2 into two parts, one part is located in the effective area 12 and the other part is located in the waste area 11; there are two test points 3, and the two test points 3 are respectively arranged at the two ends of the S-shaped test line 2 along its length direction, and the test points 3 are electrically connected to the S-shaped test line 2; exemplarily, the test point 3 can be a test pad for electrically connecting and contacting the detection component and performing a continuity test.

[0023] In this embodiment, the graphic production of the S-shaped test line 2 adopts the sine function: y=w / 2*sin(t / 4), where w is the width of the board 1, t is [0, l], and l is the length of the board 1; thus, it can be obtained that the minimum positive period of the graphic of the S-shaped test line 2 is 2π / 4; so that the density of the S-shaped test line 2 on the board 1 is always the same, saving wire materials; in this embodiment, the width of the S-shaped test line 2 needs to be controlled within a reasonable range, taking into account both saving raw materials and avoiding short circuits, wherein the width of the S-shaped test line 2 is set to 0.15mm, taking into account both saving raw materials and avoiding short circuits; and 1mm of length is reserved at both ends of the length direction of the S-shaped test line 2 for setting test pads; when the board 1 is cut and needs to be tested, the detection component 5 is electrically contacted with the test points 3 at both ends of the S-shaped test line 2, and whether the cutting of the board 1 meets the standards can be determined by judging the continuity of the circuit; if the circuit is in an open circuit state, it indicates that the cutting is in place (meets the standards); if the circuit is in a short circuit state, it indicates that the cutting is not in place (does not meet the standards).

[0024] In this embodiment, since the S-shaped test line 2 includes multiple curved wires, when the cutting position completes the cutting and forms the cutting groove 13, there will be multiple cut wires, such as Figure 1As shown in the figure, there are four cut-off points between the first wire body 21 and the second wire body 22, namely a, b, c, and d, a total of four points, that is, the S-shaped test line 2 is cut at the above four points; when the board body 1 is subsequently cut and tested, as long as one of the above four points is in a cut-off state, the test result will be displayed as meeting the standard; compared with the traditional test line that only has one test line running through the cutting groove 13, it has higher detection accuracy; because only one test line running through the cutting groove 13 is set, after the cutting position is completed, the copper foil exposed at the cut position of the test line at the cutting groove 13 may be slightly connected again (so that the test line is still in a conductive state), thereby causing the test result to show a short circuit, and then generating a false alarm; the reason why the exposed copper foil at both ends of the cutting groove 13 is slightly connected is that during the cleaning process of the board body 1, a part of the copper foil produced by the cutting will be slightly connected. Some conductive waste materials come into contact with the exposed copper foil at both ends of the cutting groove 13, thereby reconnecting the cut test line at the cutting groove 13, so that a short circuit will be displayed in the subsequent detection, causing a false alarm. On the other hand, during the cleaning process of the cut plate 1, the copper foil exposed at both ends of the cutting groove 13 will be slightly connected again due to external force. In this embodiment, since the S-shaped test line 2 has multiple cutting points at the cutting groove 13, the existence of multiple cutting points greatly reduces the probability of the exposed copper foil at both ends of the cutting groove 13 being slightly connected again (as long as one cutting point is in a disconnected state, that is, the copper foil at both ends at the cutting point is not connected, it indicates that the cutting is qualified); thereby avoiding the display of a short circuit in the subsequent test (in fact, the test line has been cut), so that the accuracy of the detection result can be further improved and the probability of false alarm is reduced.

[0025] Reference Figure 1 As shown, in one embodiment of the present application, the test points 3 provided at both ends of the S-shaped test line 2 are both provided in the waste area 11; or the two test points 3 are both provided in the effective area 12; or one of the two test points 3 is provided in the effective area 12 and the other is provided in the waste area 11; as long as the above-mentioned two test points 3 can be coordinated with the detection component 5 to test whether the S-shaped test line 2 is cut off; illustratively, this embodiment preferably adopts the arrangement of both test points 3 in the waste area 11, so that the space area occupied in the effective area 12 due to the arrangement of the test points 3 can be reduced, which helps to provide more space margin for the arrangement of related electronic components in the effective area 12.

[0026] Reference Figure 1As shown, in one embodiment of the present application, there are multiple S-shaped test lines 2, and the multiple S-shaped test lines 2 are arranged at intervals along the length direction of the cutting position; since the cutting groove 13 surrounds the effective area 12, that is, the cutting groove 13 is the dividing line between the effective area 12 and the waste area 11, the direction of the cutting groove 13 depends on the shape of the effective area 12, so the cutting groove 13 corresponding to each effective area 12 will include several segments. In order to improve the accuracy of the cutting detection of the plate body 1, at least one S-shaped test line 2 is arranged on each segment of the cutting groove 13 (each S-shaped test line 2 corresponds to two test points 3). By testing the S-shaped test line 2 on each cutting groove 13 segment, the cutting condition of the plate body 1 can be more comprehensively detected. Only when the S-shaped test line 2 on each cutting groove 13 segment shows a broken circuit state during detection, it indicates that the cutting of the cutting groove 13 corresponding to the effective area 12 meets the cutting standard.

[0027] Reference Figure 1 In one embodiment of the present application, the S-shaped test line 2 includes at least four conductors, and the at least four conductors are connected end to end in sequence; Figure 1 As shown in the partially enlarged view, the four conductors included in the S-shaped test line 2 all cross the cutting groove 13, such as the cutting point a is on one of the conductors, the cutting point b is on one of the conductors, the cutting point c is on one of the conductors, and the cutting point d is on one of the conductors; with this arrangement, as long as any one of the above four conductors is cut at the cutting point, the detection circuit will show a circuit break (indicating that the cutting meets the standard) during subsequent detection; compared with only setting one conductor across the cutting groove 13, the probability of false alarms during subsequent detection is greatly reduced; illustratively, the S-shaped test line 2 can include five, six or more conductors.

[0028] Secondly, refer to Figure 2-Figure 9 As shown, an embodiment of the present application provides a detection device for detecting the anti-leaking cut circuit board in the above-mentioned embodiment, and the detection device has a Z direction extending vertically, including a frame 4 and a detection component 5; wherein the frame 4 has a detection position for placing the board 1, and the board 1 is placed on the above-mentioned detection position when it is detected after cutting; the inspection component is connected to the frame 4 when it moves along the Z direction, and the detection component 5 has a detection head that can move along the Z direction, and the detection head is set corresponding to the test point 3, that is, each detection head corresponds to a test point 3; the position setting of the detection head on the detection component 5 corresponds to the position of the test point 3 on the board 1; and the detection head is elastically connected to the detection component 5. For example, the detection head and the detection component 5 are connected via a spring, and of course, other structural parts with elastic deformation characteristics can also be used for connection.

[0029] In this embodiment, when the board 1 located at the detection position is detected, the detection component 5 is driven to move from top to bottom toward the board 1, so that the detection head contacts the test point 3 located on the board 1, and the detection component 5 is continued to be driven downward, so that the elastic structure (such as a spring) connected between the detection head and the detection component 5 is compressed to a certain extent, and the detection component 5 is controlled to stop moving. Then, the detection component 5 is used to realize the continuity test of the S-shaped test line 2 on the board 1 through the detection head and the test point 3; for example, since there are multiple S-shaped test line 2, each S-shaped test line 2 requires two corresponding detection heads (constituting a group of detection units) when performing a continuity test; therefore, multiple groups of detection units (including two detection heads) are provided on the detection component 5, and the positions of the detection units relative to the detection component 5 are set according to the test points 3 provided on the board 1 at both ends of the S-shaped test line 2; as long as the detection component 5 moves from top to bottom and the elastic structural member connected between the detection component 5 and the detection head is compressed to a certain extent, each detection head is in close contact with the corresponding test point 3.

[0030] In this embodiment, the detection head and the detection component 5 are connected via an elastic structural member in order to ensure that when the detection component 5 moves from top to bottom to a preset distance, each detection head can be in close contact with the corresponding test point 3, while at the same time avoiding the detection head from exerting an excessive abutting force on the test point 3 due to the detection component 5 moving downward too far, thereby causing damage to the plate 1.

[0031] Reference Figure 2-Figure 9 As shown, in one embodiment of the present application, the detection assembly 5 includes a lifting plate 51, a first cylinder 52, a first valve plate 53, a detection probe 54 (a conductive structural member), and an electronic control component; wherein the lifting plate 51 is connected to the frame 4 for movement along the Z direction. For example, the frame 4 includes a base 44, a guide column 43, and a mounting plate 42. Figure 6 As shown, guide posts 43 extending along the Z direction are respectively provided at the four corners of the base 44, and holes matching the guide posts 43 are provided at corresponding positions on the lifting plate 51, so that the lifting plate 51 can be connected to the base 44 by moving along the Z direction. A mounting plate 42 is fixedly connected to the upper end of the guide post 43, and an electric push rod 8 is fixed to the mounting plate 42. The telescopic end of the electric push rod 8 is fixedly connected to the lifting plate 51, so as to drive the lifting plate 51 to move along the Z direction. Figure 3As shown, the first cylinder 52 is fixedly mounted on the upper end surface of the lifting plate 51 (the first cylinder 52 is fixedly mounted on the lifting plate 51 via a rod. The figure only shows the structure of the first cylinder 52, and does not show the rod for fixing the first cylinder 52. Those skilled in the art can arrange the rod accordingly according to actual conditions to fix the first cylinder 52 on the upper end surface of the lifting plate 51). The first valve plate 53 is connected to the first cylinder 52 for movement along the Z direction, and an elastic structural member (such as a spring) is connected between the upper end of the first valve plate 53 and the first cylinder 52. Figure 7 As shown, the first valve plate 53 includes a valve plate and a valve stem connected to the valve plate. The valve stem extends downwardly from the first cylinder 52, and one end of the valve stem extending downwardly is fixedly connected to two detection probes 54 (the detection probes 54 are insulated from the valve stem). The detection probes 54 constitute a detection head; the electronic control component includes a battery pack and a wire. The battery pack is used to provide power, and the wire is used to electrically connect to the detection probe 54. For example, multiple groups of electronic control components can be provided, that is, each S-shaped test line 2 corresponds to an electronic control component; as shown Figure 8 As shown, the detection probe 54 passes through the lifting plate 51 along the Z direction. Exemplarily, a hole for the detection probe 54 to pass through is provided on the lifting plate 51, and the detection probe 54 is spaced apart from (not in contact with) the inner wall of the hole.

[0032] In this embodiment, if Figure 5 As shown, this is the position of the detection component 5 (that is, the lifting plate 51) when it is not in the detection state. At this time, the detection probe 54 is located above the plate body 1; when detection is required, the lifting plate 51 is driven by the electric push rod 8 to move from top to bottom, thereby synchronously driving the first cylinder 52, the first valve plate 53, and the detection probe 54 to move downward, so that the bottom of the detection probe 54 abuts against the test point 3, and the electric push rod 8 is continued to be controlled to drive the detection probe 54 to move downward for a certain distance, and then the electric push rod 8 is controlled to stop working. When the bottom of the detection probe 54 abuts against the test point 3, the detection probe 54 continues to move downward, so that The elastic structure connected between the first cylinder 52 and the first valve plate 53 is squeezed to a certain extent. At this time, the detection probe 54 is tightly abutted against the test point 3 under the action of the elastic structure, ensuring close contact between the detection probe 54 and the test point 3. Then the battery pack is controlled to supply power. If no current is detected in the circuit, it indicates that the S-shaped test line 2 is cut off (the cutting meets the standard); if current is detected in the circuit (for example, in order to avoid excessive current in the event of a short circuit and cause a safety accident, a resistor can be connected in series in the circuit), it indicates that the S-shaped test line 2 is not cut off (the cutting does not meet the standard); if Figure 3 The above diagram is a schematic diagram of the state when the lifting plate 51 moves down a preset distance and the detection probe 54 abuts against the test point 3, as shown in FIG. Figure 4 , which is a schematic diagram of the state when the detection probe 54 has not yet contacted the test point 3.

[0033] In this embodiment, a detection platform 41 is provided on the base 44. The upper end surface of the detection platform 41 constitutes a detection position for placing the plate 1. Stop columns 411 are respectively provided at the four corners of the detection platform 41. The upper end surface of the stop column 411 is provided with a contact sensor (the contact sensor and the electric push rod 8 are both communicatively connected to the central controller). Figure 3 As shown, when the lifting plate 51 is driven by the electric push rod 8 and moves downward until the lower end surface of the lifting plate 51 abuts against the upper end surface of the stop column 411, the contact sensor detects that the lifting plate 51 has moved downward to the preset position, and the central controller controls the electric push rod 8 to stop extending; Figure 1 As shown, a guide hole 14 (the inner diameter of the guide hole 14 is slightly larger than the diameter of the guide column 43 or the same as the diameter of the guide column 43) that cooperates with the stop column 411 can be preset at the corresponding position on the plate body 1 (in the waste area 11), so that the plate body 1 placed on the detection position can be positioned by cooperating with the stop column 411 and the guide hole 14 to avoid displacement; when the detection is completed, the electric push rod 8 is controlled to retract and drive the lifting plate 51 to move upward to the initial position, so that the bottom of the detection probe 54 is out of contact with the test point 3, which is used to detect the next plate body 1.

[0034] Reference Figure 3-Figure 7 As shown, in one embodiment of the present application, the detection device further includes a cleaning assembly 6, which includes a second cylinder 61, a second valve plate 62, a first tube 63, a cleaning tube 64, a first valve 65 and a one-way valve 66; wherein the second cylinder 61 is also fixedly mounted on the upper end surface of the lifting plate 51 (the specific fixing structure can adopt the same fixing method as the first cylinder 52, which is not shown in the figure), as shown in FIG. Figure 3 As shown, a second valve plate 62 is connected to the second cylinder 61 along the Z direction, and the second valve plate 62 and the second cylinder 61 are elastically connected (the two are connected via an elastic structure, such as a spring); the first tube 63 has a first end and a second end, wherein the first end is connected to the top of the first cylinder 52, and the second end is connected to the top of the second cylinder 61; the cleaning tube 64 has a third end and a purge end, wherein the third end is connected to the top of the second cylinder 61, the cleaning tube 64 passes through the lifting plate 51 downward, and is provided with a purge end, as shown in FIG. Figure 8As shown, the purge end includes a nozzle 67 connected to the bottom of the cleaning pipe 64. An exemplary nozzle 67 can be provided in plurality, and each nozzle 67 faces a different direction; a first valve 65 is provided on the cleaning pipe 64, and the first valve 65 is used to control the on-off of the cleaning pipe 64; a one-way valve 66 is provided at the top of the first cylinder 52, and the one-way valve 66 can only allow external gas to enter the first cylinder 52, and the gas in the first cylinder 52 cannot be discharged from the one-way valve 66 to the outside world (thus, when the lifting plate 51 moves upward under the action of the electric push rod 8, the first valve plate 53 moves toward the bottom of the first cylinder 52 under the action of the elastic structure connected thereto, thereby drawing the gas in the external environment into the first cylinder 52 through the one-way valve 66, for cooperating with the movement of the first valve plate 53 in the first cylinder 52), the bottom of the first cylinder 52 and the bottom of the second cylinder 61 are both connected to the outside world.

[0035] In this embodiment, the electric push rod 8 drives the lifting plate 51 to move from top to bottom, so that the bottom of the detection probe 54 abuts against the test point 3 and as the lifting plate 51 continues to move downward, the first valve plate 53 moves in the first cylinder 52 toward the direction of compressing the elastic structure. As the first valve plate 53 moves, the gas in the space above the first valve plate 53 is simultaneously pressed into the second cylinder 61 through the first pipe 63. As the gas enters, the second valve plate 62 is forced to move in the second cylinder 61 toward the direction of squeezing the elastic structure (that is, downward); so that the lifting plate 51 moves down to the preset position; Figure 3 As shown, at this time, the second valve plate 62 moves down a certain distance in the second cylinder 61 (at this time, the first valve 65 provided on the cleaning pipe 64 is in a closed state); if the circuit is detected to be in a disconnected state at this time, it indicates that the cutting groove 13 is cut to standard, and the lifting plate 51 can be controlled to move up to the initial position, thereby completing the inspection of the plate body 1; illustratively, since the test meets the standard, when the electric push rod 8 is controlled to drive the lifting plate 51 to move up, the first valve plate 53 will move in the first cylinder 52 toward the bottom of the first cylinder 52 under the action of the elastic structure, thereby drawing the gas originally pressed into the second cylinder 61 back into the first cylinder 52, and when the first valve plate 53 moves to the initial position in the first cylinder 52, the second valve plate 62 also moves to the initial position in the second cylinder 61.

[0036] If the circuit is detected to be in a short-circuit state at this time, it indicates that the S-shaped test line 2 has not been cut off (there are two situations, one situation: the S-shaped test line 2 is indeed not cut off, and the cutting groove 13 does not meet the standard; the other situation: the S-shaped test line 2 is cut off, but the exposed copper foils at both ends of the cutting groove 13 are slightly connected together); at this time, the first valve 65 on the cleaning pipe 64 is controlled to open, and the second valve plate 62 moves up quickly in the second cylinder 61 under the action of the elastic structure, so that the gas pressed into the second cylinder 61 is blown out through the cleaning pipe 64 and the nozzle 67 in turn; for example, it is set that when the lifting plate 51 moves a preset distance from top to bottom, that is, it is in the following state Figure 3 When the nozzle 67 is in the position shown in FIG, there is a slight distance between the nozzle 67 and the upper end surface of the plate 1 (it is necessary to ensure that the nozzle 67 does not contact or collide with the upper end surface of the plate 1), and the nozzle 67 should be directed to the position where the S-shaped test line 2 is cut by the cutting groove 13; at this time, since the lifting plate 51 is still in the position shown in FIG. Figure 3 3. The position shown in FIG (the detection probe 54 abuts the test point 3), which makes the first valve plate 53 unable to move in the first cylinder 52. As a result, when the second valve plate 62 moves upward in the second cylinder 61, the gas in the second cylinder 61 is pressed into the cleaning pipe 64 and blown toward the S-shaped test line 2 through the nozzle 67 connected to the bottom of the cleaning pipe 64, so as to be used for re-cleaning the portion where the S-shaped test line 2 is cut by the cutting groove 13, so as to blow away the conductive waste overlapped on the exposed copper foil at both ends of the cutting groove 13. After the second valve plate 62 moves to the initial position in the second cylinder 61, the first valve 65 is controlled to close again, and the lifting plate 51 is driven upward by the electric push rod 8 until it moves to the initial position (as shown in FIG). Figure 5 As shown), the electric push rod 8 is then controlled to drive the lifting plate 51 downward again, until it moves to the position shown in FIG. Figure 2 The position shown is used to re-inspect (secondary inspection) the S-shaped test line 2. If the circuit is displayed as being in an open circuit state during the re-inspection (secondary inspection), it indicates that during the first inspection, there was indeed conductive waste overlapping the exposed copper foil at both ends of the cutting groove 13. If the circuit is still displayed as being in a short circuit state, it indicates that the S-shaped test line 2 has not been cut, that is, the cutting of the cutting groove 13 is unqualified (does not meet the standard).

[0037] Reference Figure 2-Figure 9As shown, in one embodiment of the present application, the detection device also includes a marking group 7, which includes a third cylinder 71 body, a third valve plate 72, a second tube 74, a second valve 75 and a third valve 711; wherein the third cylinder 71 body is also fixedly mounted on the upper end surface of the lifting plate 51 (the specific fixing structure can adopt the same fixing method as the first cylinder 52, which is no longer shown in the figure), the third valve plate 72 is connected to the third cylinder 71 body along the Z direction, and the third valve plate 72 and the third cylinder 71 body are elastically connected (the two are connected by an elastic structural member, such as a spring); a second tube 74 is connected between the second cylinder 61 and the top of the third cylinder 71 body (the second tube 74 has a fourth end connected to the top of the second cylinder 61 and a fifth end connected to the top of the third cylinder 71 body), and a second valve 75 is provided on the second tube 74 (communicating with the central controller), and the second valve 75 is used to control The second tube 74 is open and closed; the third valve plate 72 includes a valve plate and a valve stem, the valve plate and the valve stem are connected, and the bottom of the valve stem extends downwardly from the bottom of the third cylinder 71 body (the bottom of the third cylinder 71 body is provided with a hole for allowing the valve stem to extend downward, and the inner diameter of the hole is larger than the outer diameter of the valve stem, that is, the bottom of the third cylinder 71 body is connected to the external environment); the valve stem extends outward from the third cylinder 71 body. One end is equipped with a marking member 73. For example, the marking member 73 can be a marking pen (such as a water-based marker, which can be easily erased when not needed); the third valve 711 (communicating with the central controller) is provided at the top of the third cylinder 71 body, for controlling the conduction between the space inside the third cylinder 71 body above the third valve plate 72 and the external environment; a hole for allowing the marking member 73 to pass through is provided along the Z direction on the lifting plate 51 (the outer periphery of the marking member 73 and the inner wall of the hole are spaced apart, that is, they are not in contact).

[0038] In this embodiment, if the circuit display is still in a short-circuit state during the re-inspection (secondary inspection) of the plate body 1, it indicates that the cutting of the plate body 1 does not meet the standards and needs to be re-cut. Specifically, when the circuit display is still in a short-circuit state during the re-inspection, the second valve 75 provided on the second pipe 74 is controlled to open (the first valve 65 remains closed). At this time, the second valve plate 62 is driven by the elastic structure connected thereto to move the second valve plate 62 upward rapidly in the second cylinder 61, thereby The gas in the space above the second valve plate 62 is pressed into the third cylinder 71 through the second tube 74, and forces the third valve plate 72 to move downward in the third cylinder 71, thereby moving the marking member 73 downward and leaving a mark on the upper surface of the plate body 1 (for marking the cutting groove 13 that does not meet the cutting standards). It should be noted that: when the bottom of the marking member 73 abuts against the upper surface of the plate body 1, the marking member 73 cannot move further downward, and at this time, the second valve plate 62 and the third valve plate 72 cannot move further.

[0039] In this embodiment, if the circuit display is in an open circuit state when the plate body 1 is re-inspected (secondary inspection), it indicates that the S-shaped test line 2 is in a disconnected state at this time, which means that the reason why a short circuit was displayed during the first inspection was that there was indeed conductive waste generated by cutting that overlapped the exposed copper foil at both ends of the cutting groove 13, causing the S-shaped test line 2 to be conductive; at this time, the marking member 73 is no longer needed for marking. At this time, the first valve 65 provided on the cleaning pipe 64 can be controlled to open to discharge the gas pressed into the second cylinder 61 from the nozzle 67 (and then moved up to the initial position by the lifting plate 51 brought by the electric push rod 8); or the lifting plate 51 brought by the electric push rod 8 can be directly moved up to the initial position. As the lifting plate 51 moves up, the first valve plate 53 moves toward the bottom of the first cylinder 52 under the action of the elastic structure, thereby drawing the gas originally pressed into the second cylinder 61 back into the first cylinder 52.

[0040] In this embodiment, the projection of the marking part 73 in the Z direction can be located in the effective area 12 or in the waste area 11. In short, it needs to be set at a position close to the S-shaped test line 2, so that the mark left by the marking part 73 is located in the effective area 12 or the waste area 11 close to the S-shaped test line 2, so that subsequent staff can perform secondary cutting on the cutting groove 13 that does not meet the cutting standards; as a preference, the projection of the marking part 73 in the Z direction can be located in the effective area 12, because the area on the lifting plate 51 corresponding to the effective area 12 is larger, which is conducive to the layout of the positions of the first cylinder 52, the second cylinder 61, and the third cylinder 71.

[0041] In this embodiment, when the marking member 73 abuts against the upper surface of the plate body 1 and the marking is completed, the third valve 711 is controlled to open, so that the gas in the space above the second valve plate 62 is discharged outward through the third valve 711; then the lifting plate 51 carried by the electric push rod 8 is controlled to move upward until it moves to the initial position; thereby, the first valve plate 53, the second valve plate 62, and the third valve plate 72 are all restored to their initial positions, and then the second valve 75 provided on the second tube 74 and the third valve 711 provided on the top of the third cylinder 71 are controlled to be closed; in this embodiment, the positional relationship of the matching first cylinder 52, second cylinder 61, and third cylinder 71 is correspondingly and matched with the extension direction of the S-shaped test line 2 on the plate body 1.

[0042] In this solution, the detection probe 54 is fixedly mounted on the first valve plate 53 and the first valve plate 53 is elastically connected to the first cylinder 52. On the one hand, elastic contact is achieved between the detection probe 54 and the test point 3 on the plate body 1, making the contact and fit between the detection probe 54 and the test point 3 closer. At the same time, it also avoids the electric push rod 8 driving the lifting plate 51 to move downward too far. However, the contact force between the detection probe 54 and the test point 3 is too large, thereby causing irreversible damage to the plate body 1; and through the cooperation between the first valve plate 53 and the first cylinder 52, the movement of the first valve plate 53 in the first cylinder 52 is fully utilized to drive the movement of the gas between the first cylinder 52, the second cylinder 61 and the second cylinder 61, the third cylinder 71, and realize the secondary flushing of the S-shaped test line 2 on the plate body 1 cut by the cutting groove 13 (for re-inspection), and the marking of the cutting groove 13 that fails the cutting; that is, the accurate detection of the cutting of the plate body 1 is completed, and the marking of the cutting groove 13 that fails the cutting is realized (for the staff to perform secondary cutting processing on it later).

[0043] In a third aspect, the embodiments of the present application further provide a detection method, which uses the detection device in the above embodiment and includes the following steps: S1: First, the plate body 1 is cut along the cutting position to form a cutting groove 13 on the plate body 1. The cutting groove 13 divides the plate body 1 into a useful area 12 and a waste area 11.

[0044] S2: In the Z direction, drive the detection component 5 downward so that the detection head abuts the test point 3; if the S-shaped test line 2 is open, it indicates that the cutting process of the cutting groove 13 is normal (the cutting meets the standard); if the S-shaped test line 2 is short-circuited, it indicates that the cutting process of the cutting groove 13 is abnormal.

[0045] There are two situations at this time. The first situation is that the S-shaped test line 2 is indeed not cut (the cutting does not meet the standards); the second situation is that the S-shaped test line 2 is indeed cut, but when it is cleaned, the cutting waste with conductive properties overlaps the exposed copper foil at both ends of the cutting groove 13, making the S-shaped test line 2 conductive again; at this time, the plate body 1 can be re-inspected (secondary inspection), and when the electric push rod 8 drives the lifting plate 51 to move upward, the nozzle 67 is used to blow and clean the part of the S-shaped test line 2 cut by the cutting groove 13 again; then, during the re-inspection, the marking member 73 is controlled to mark according to the re-inspection result.

[0046] To sum up, the present application sets an S-shaped test line 2 on the cutting groove 13. Since the S-shaped test line 2 contains multiple wires set through the cutting position, as long as any wire is cut by the cutting groove 13 (the S-shaped test line 2 is no longer conductive), the circuit will be in an open circuit state during testing (indicating that the cutting of the cutting groove 13 on the circuit board meets the requirements); compared with the traditional method of setting only one wire through the cutting position, it can better avoid the S-shaped test line 2 from contacting the exposed copper foil at both ends of the cutting groove 13 (the cutting waste with conductive properties is overlapped on the exposed copper foil at both ends, causing the S-shaped test line 2 to be conductive) and when detecting, the circuit is displayed in a short-circuit state, thereby generating a false alarm, thereby improving the accuracy of detection; the present application uses the S-shaped test line 2 in conjunction with the detection circuit to detect the cutting of the circuit board, replacing the traditional manual visual inspection, and further improving the detection efficiency.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A circuit board for preventing leaking cuts, characterized in that: include: A plate body (1), the plate body (1) having a waste area (11) and an effective area (12), a cutting position formed between the waste area (11) and the effective area (12), and cutting along the cutting position to form a cutting groove (13); An S-shaped test line (2) is provided at the cutting position, and the S-shaped test line (2) extends along the length direction of the cutting groove (13); in a length direction perpendicular to the cutting groove (13), the cutting position divides the S-shaped test line (2) into a first line body (21) and a second line body (22); one of the first line body (21) and the second line body (22) is located in the effective area (12), and the other is located in the waste area (11); and There are two test points (3), which are respectively arranged at two ends of the length direction of the S-shaped test line (2), and the test points (3) are electrically connected to the S-shaped test line (2).

2. The circuit board for preventing leaking cuts according to claim 1, wherein: The two test points (3) are both located in the waste area (11); or The two test points (3) are both located in the effective area (12); or One of the two test points (3) is located in the effective area (12), and the other is located in the waste area (11).

3. The circuit board for preventing leaking cuts according to claim 1, wherein: There are a plurality of S-shaped test lines (2), and the plurality of S-shaped test lines (2) are arranged at intervals along the length direction of the cutting position.

4. The circuit board for preventing leaking cuts according to claim 1, wherein: The S-shaped test line (2) comprises at least four conducting wires, and the at least four conducting wires are connected end to end in sequence.

5. A detection device for detecting the circuit board for preventing leaking of cuts according to any one of claims 1 to 4, wherein the detection device has a Z direction extending vertically, characterized in that: include: A frame (4), wherein the frame (4) has a detection position for placing the plate (1); A detection component (5) is connected to the frame (4) so as to be movable along the Z direction. The detection component (5) has a detection head that can be movable along the Z direction. The detection head is arranged corresponding to the test point (3), and the detection head is elastically connected to the detection component (5).

6. The detection device according to claim 5, characterized in that The detection component (5) comprises: A lifting plate (51) is connected to the frame (4) and moves along the Z direction; and A first cylinder (52) is provided on the upper end surface of the lifting plate (51); A first valve plate (53) is arranged in the first cylinder (52) and moves along the Z direction, and the first valve plate (53) is elastically connected to the first cylinder (52); Two detection probes (54) are provided, and the two detection probes (54) are connected to one end of the first valve plate (53) and extend downward from the first cylinder (52); in the Z direction, the two detection probes (54) pass through the lifting plate (51), and the two detection probes (54) do not contact the lifting plate (51), and the detection probes (54) constitute the detection head; The electric control component is electrically connected to the detection probe (54).

7. The detection device according to claim 6, characterized in that The detection device also includes: A second cylinder (61) is provided on the upper end surface of the lifting plate (51); and A second valve plate (62) is connected to the second cylinder (61) so as to be movable along the Z direction, and the second valve plate (62) is elastically connected to the second cylinder (61); A first tube (63) having a first end communicating with the top of the first cylinder (52) and a second end communicating with the top of the second cylinder (61); a cleaning pipe (64) having a third end communicating with the top of the second cylinder (61) and a purge end extending downward and passing through the lifting plate (51); a first valve (65), provided on the cleaning pipe (64), for controlling the opening and closing of the cleaning pipe (64); A one-way valve (66) is provided at the top of the first cylinder (52).

8. The detection device according to claim 7, wherein: The detection device also includes: A third cylinder (71) is provided on the upper end surface of the lifting plate (51); and The third valve plate (72) is connected to the body of the third cylinder (71) so as to move along the Z direction, and the third valve plate (72) is elastically connected to the body of the third cylinder (71); the third valve plate (72) drives a marking member (73), and in the Z direction, the marking member (73) passes downward through the lifting plate (51); A second tube (74) having a fourth end communicating with the top of the second cylinder (61) and a fifth end communicating with the top of the third cylinder (71); a second valve (75), provided on the second pipe (74), for controlling the opening and closing of the second pipe (74); The third valve (711) is provided at the top of the third cylinder (71).

9. The detection device board according to any one of claims 5 to 8, characterized in that: The frame (4) is provided with a detection platform (41), and the upper end surface of the detection platform (41) constitutes the detection position.

10. A detection method, using the detection device according to claim 5, characterized in that: The following steps are involved: S1: first, cutting the plate along the cutting position to form the cutting groove on the plate; S2: In the Z direction, the detection component is driven to move downward so that the detection head abuts against the test point; if the S-shaped test line is open, it indicates that the cutting groove cutting process is normal; if the S-shaped test line is short-circuited, it indicates that the cutting groove cutting process is abnormal.

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