An optical detection device

Abstract

The application discloses an optical detection device for detecting defects of a PCB, which comprises an optical assembly and a marking assembly arranged on the optical assembly. The optical assembly comprises an optical head, and the marking assembly comprises a bracket, a marking pen and a driving mechanism. The bracket is fixedly arranged relative to the optical head, and the bracket is provided with a guide rail and a guide block. The marking pen is fixedly connected with the guide block, and the bracket is further provided with a sleeve. Under the driving of the driving mechanism, the guide block drives the marking pen to move along the guide rail, so that the marking pen can be switched from a first state to a second state. When the marking pen is in the first state, the pen end of the marking pen is retracted in the sleeve. When the marking pen is in the second state, the pen end of the marking pen is out of the sleeve and contacts a region position on the current PCB to be detected which is opposite to the optical head. The application not only solves the problems of easy exhaustion of the pen head of the marking pen and replacement of the marking pen, but also realizes accurate marking of the defect position on the PCB by the marking pen.

Description

Technical Field

[0001] This invention relates to the field of mechanical adjustment, and more particularly to an optical inspection device. Background Technology

[0002] After inspecting the PCB board with an optical head, it is necessary to mark the defects on the PCB board so that the next process, namely the identification and repair of the defective parts of the PCB board, can be carried out. Therefore, a marking pen is needed to quickly and accurately mark the locations of defects on the PCB board.

[0003] Currently, the marking pens commonly used in existing technologies employ two sets of cylinders for switching and sealing, and add pentaerythritol fatty acid esters to the marking pens to prevent the pen tip from drying out. However, when the ink in the marking pen runs out, the process of replacing the marking pen is quite cumbersome, making it difficult to replace the marking pen. Therefore, although this method solves the problem of marking pen ink running out to a certain extent, it also hinders the rapid marking of defects on PCB boards.

[0004] Existing technology also uses a sealing film with a cross-shaped opening at the tip of the marker pen. This method also has some problems. When the marker pen is frequently inserted and withdrawn, the ink from the pen tip will be leaked onto the cross-shaped film. Over time, a large amount of ink will accumulate on the film, and this ink will drip onto the PCB board, thus contaminating the PCB board and causing it to be scrapped.

[0005] In addition, the existing marking pen uses a three-point screw locking method for clamping and fixing. When the marking pen is used up and a new marking pen is needed, it is necessary to remove the three clamping screws in different directions and the top clamping screw. The replacement of the marking pen takes a long time and also requires professional tools. Summary of the Invention

[0006] To address the problems of existing technologies, this invention provides an optical detection device, the specific technical solution of which is as follows:

[0007] This invention provides an optical inspection device for detecting defects in a PCB board. The optical inspection device includes an optical component and a marking component disposed on the optical component, wherein...

[0008] The optical component includes an optical head for detecting the location of defects on the PCB board;

[0009] The marking assembly includes a bracket, a marking pen, and a driving mechanism. The bracket is fixedly mounted relative to the optical head. The bracket is provided with a guide rail and a guide block that cooperates with the guide rail. The marking pen is fixedly connected to the guide block. The bracket is also provided with a sleeve that cooperates with the tip of the marking pen.

[0010] The power output end of the drive mechanism is fixedly connected to the guide block. Under the drive of the drive mechanism, the guide block drives the marker pen to move along the guide rail, so that the marker pen can switch from the first state to the second state.

[0011] When the marking pen is in the first state, the tip of the marking pen is retracted inside the sleeve; when the marking pen is in the second state, the tip of the marking pen protrudes from the sleeve and contacts the area on the PCB board to be inspected that is opposite to the optical head.

[0012] Furthermore, the marking assembly also includes a cap that mates with the end of the sleeve;

[0013] When the marker pen is in the first state, the cover is connected to the sleeve; when the marker pen is in the second state, the cover is separated from the sleeve. That is, when the marker pen is in use, the cover is separated from the sleeve; when the marker pen is not in use, the cover is closed to prevent ink evaporation when the marker pen is not used for a long time. This process can be implemented manually or through the following methods.

[0014] Furthermore, the marking assembly also includes a connecting rod and a limiting member, with the cover disposed at one end of the connecting rod and the other end of the connecting rod rotatably connected to the bracket;

[0015] The limiting member and the guide block are fixed in relative position, and the side of the limiting member away from the guide block is always in contact with the connecting rod;

[0016] When the marker pen is in the first state, the cover is sealed to the end of the sleeve;

[0017] During the process of the marker pen switching from the first state to the second state, the limiting member pushes the connecting rod to rotate away from the sleeve, and causes the cover to leave the area opposite to the pen tip when or before the pen tip reaches the end face of the sleeve.

[0018] Furthermore, the cover is located at the lower port of the sleeve, and the upper surface of the cover has a groove. When the marker pen leaks ink, the groove can collect a certain amount of ink, preventing it from falling onto the PCB board and thus contaminating it.

[0019] Furthermore, the guide block is provided with a through hole for the marking pen to pass through, and the marking assembly also includes a tightening mechanism for fixing the marking pen in place. The tightening mechanism includes a handwheel, a clamping block, a rotating screw, and a limiting ring fixedly sleeved on the rotating screw, wherein:

[0020] The clamping block is disposed in the through hole, and its inner side is provided with an arc-shaped structure for fitting the marking pen. One end of the rotating screw is fixedly connected to the handwheel, and the other end passes through the side wall of the guide block and is connected to the outer side of the clamping block by a threaded engagement.

[0021] The guide block is also provided with a limiting groove that matches the limiting ring. The limiting groove restricts the limiting ring from approaching or moving away from the marker pen, so that when the handwheel or rotating screw rotates in different directions, the clamping block tends to move closer to or away from the marker pen. The handwheel can be used to easily lock or loosen the marker pen, thereby facilitating the installation, removal, and replacement of the marker pen.

[0022] Furthermore, the marking assembly also includes a first return spring, one end of which is fixedly connected to the bracket and the other end of which is fixedly connected to the guide block or the marking pen. When the marking pen is in the first state, the first return spring is in the natural state.

[0023] Furthermore, the marking assembly also includes a second return spring and / or a buffer pad and / or a ring with a brush, wherein:

[0024] One end of the second return spring is fixedly connected to the bracket, and the other end is fixedly connected to the connecting rod. When the marker pen is in the first state, the second return spring is in the natural state.

[0025] The buffer pad is an elastic annular structure, which is disposed at the lower port edge of the sleeve and / or the upper edge of the cover.

[0026] The ring is disposed at the upper port of the sleeve, and its brush is disposed on the side wall of the marking pen.

[0027] Furthermore, the marking assembly also includes a calibration ruler mounted on the guide block and extending in the height direction, the calibration ruler being used to determine its installation height when replacing with a marking pen of the same specification; and / or,

[0028] The marking pen has a tapering structure in the direction away from the pen tip.

[0029] Furthermore, the driving mechanism of the marking component is a cylinder, the power output end of the cylinder is connected to a floating joint, and the floating joint is fixedly connected to the guide block.

[0030] Furthermore, the marking assembly is adjustablely fixed to the optical assembly via a mounting base, a mounting plate, a first locking screw, and a second locking screw, wherein...

[0031] The mounting base is fixedly connected to the optical component;

[0032] The mounting base is provided with a threaded hole that mates with the first locking screw, and the mounting plate is provided with an arc-shaped adjustment through hole that is adapted to the first locking screw. The first locking screw is used to press the mounting plate and the mounting base together, and the first locking screw can be located at any position of the arc-shaped adjustment through hole.

[0033] The mounting plate is provided with a threaded hole that mates with the second locking screw, and the bracket is provided with a strip-shaped adjustment through hole that is adapted to the second locking screw. The second locking screw is used to press the bracket and the mounting plate together, and the second locking screw can be located at any position of the strip-shaped adjustment through hole.

[0034] The beneficial effects of the technical solution provided by this invention are as follows:

[0035] a. It not only solved the problem of the marker pen tip easily running dry, but also enabled the marker pen to accurately mark the location of defects on the PCB board;

[0036] b. Adding grooves to the cover can collect excess ink and prevent contamination of the PCB board;

[0037] c. Furthermore, the tightening mechanism allows for easy and quick replacement of the marker pen;

[0038] d. By designing the marker pen with a structure that is thinner at the top and thicker at the bottom, the displacement of the marker pen caused by the force between the marker pen and the PCB board is effectively avoided, thereby ensuring the accuracy and stability of the marking. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is a schematic diagram of the optical detection device provided in an embodiment of the present invention in a non-marked state;

[0041] Figure 2 This is a schematic diagram of the optical detection device provided in an embodiment of the present invention in a marked state;

[0042] Figure 3 This is an installation diagram of the marking assembly and mounting components of the optical inspection device provided in an embodiment of the present invention;

[0043] Figure 4 yes Figure 3A schematic diagram of the component with the markings removed from the mounting parts;

[0044] Figure 5 yes Figure 4 A schematic diagram of the marking component in the marking working state;

[0045] Figure 6 This is a front view schematic diagram of the marking component of the optical detection device provided in the embodiment of the present invention in a non-working state at its initial position;

[0046] Figure 7 This is a side cross-sectional schematic diagram of the marking component of the optical detection device provided in the embodiment of the present invention in a non-working state at its initial position;

[0047] Figure 8 yes Figure 7 An enlarged diagram of part A in the middle;

[0048] Figure 9 yes Figure 7 An enlarged schematic diagram of part B in the middle;

[0049] Figure 10 This is a first partial schematic diagram of the marking component of the optical detection device provided in an embodiment of the present invention;

[0050] Figure 11 This is a second partial schematic diagram of the marking component of the optical detection device provided in an embodiment of the present invention.

[0051] The reference numerals in the attached drawings include: 1-bracket, 2-optical head, 3-first return spring, 4-calibration ruler, 5-guide block, 7-guide rail, 8-sleeve, 81-cover, 811-groove, 9-power mechanism, 10-marking pen, 11-floating joint, 13-second return spring, 14-connecting rod, 15-ring body, 16-limiting component, 19-clamping block, 20-limiting ring, 22-handwheel, 23-rotating screw, 25-mounting base, 26-mounting plate, 27-first locking screw, 28-second locking screw. Detailed Implementation

[0052] To enable those skilled in the art to better understand the present invention and its objectives, technical solutions, and advantages, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments and accompanying drawings. It should be noted that implementations not illustrated or described in the accompanying drawings are forms known to those skilled in the art. Furthermore, while this document provides examples of parameters containing specific values, it should be understood that the parameters need not be exactly equal to the corresponding values, but can approximate the corresponding values ​​within acceptable error tolerances or design constraints. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention. In addition, the terms "comprising" and "having," and any variations thereof, in the specification and claims of this invention are intended to cover non-exclusive inclusion. For example, a process, method, apparatus, product, or device that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products, or devices.

[0053] In one embodiment of the present invention, an optical inspection device is provided for detecting defects in a PCB board, such as... Figure 1 As shown, the optical inspection device includes an optical component and a marking component adjustablely fixed to the optical component. The optical component includes an optical head 2, used to detect the location of defects on the PCB board, which can be a lens or other component capable of optical inspection. The marking component includes a marking pen 10, which is disposed on the optical component and can adjust its relative position to the optical component so that the tip of the marking pen 10 is aligned with the detection center of the optical head 2, i.e., the location of the defect on the PCB board (e.g., the location of the defect on the PCB board). Figure 2 (As shown in the dashed section), to achieve marking.

[0054] Specifically, such as Figure 3As shown, the marking assembly includes a mounting base 25, a mounting plate 26, a bracket 1, a first locking screw 27, and a second locking screw 28. The mounting base 25 is fixedly connected to the optical assembly and has a first threaded hole that engages with the first locking screw 27. The mounting plate 26 has an arc-shaped adjustment through hole adapted to the first locking screw 27. Specifically, the diameter of the head of the first locking screw 27 can be larger than the width of the arc-shaped adjustment through hole, meaning the tail of the first locking screw 27 can... The first locking screw 27 passes through the arc-shaped adjustment through hole and engages with the first threaded hole, and the head of the first locking screw 27 does not pass through the arc-shaped adjustment through hole, so that the first locking screw 27 can press and fix the mounting plate 26 onto the mounting base 25. Furthermore, in response to the first locking screw 27 being located at different positions in the arc-shaped adjustment through hole, the mounting plate 26 and the mounting base 25 have different positional relationships, that is, the mounting plate 26 can rotate relative to the mounting base 25 to meet the requirement of the marking pen 10 accurately marking defects on the PCB board.

[0055] Similarly, the mounting plate 26 is provided with a second threaded hole, which is used in conjunction with the second locking screw 28. The bracket 1 is provided with a strip-shaped adjustment through hole adapted to the second locking screw 28. The specific adaptation method is that the diameter of the head of the second locking screw 28 is larger than the width of the strip-shaped adjustment through hole, that is, the tail of the second locking screw 28 can pass through the strip-shaped adjustment through hole and connect with the second threaded hole, and the head of the second locking screw 28 does not pass through the strip-shaped adjustment through hole. This allows the second locking screw 28 to press and fix the bracket 1 on the mounting plate 26. Furthermore, in response to the second locking screw 28 being located at different positions in the strip-shaped adjustment through hole, the mounting plate 26 and the bracket 1 have different positional relationships. That is, the bracket 1 can move linearly along the length direction of the strip-shaped adjustment through hole to meet the requirement of the marking pen 10 to accurately mark defects on the PCB board.

[0056] It should be noted that the number of the first locking screw 27 and the first threaded hole, and the number of the second locking screw 28 and the second threaded hole are not specifically limited. At the same time, the matching methods of the first locking screw 27 and the arc-shaped adjustment through hole and the second locking screw 28 and the strip-shaped adjustment through hole mentioned above are all illustrative examples. The specific method is selected according to the actual situation and is not intended to limit the scope of protection of the present invention.

[0057] like Figure 4-6As shown, the marking assembly also includes a guide rail 7 disposed on the bracket 1 and a guide block 5, a drive mechanism 9, and a floating joint 11 that cooperate with the guide rail 7. In this embodiment, the drive mechanism 9 is a cylinder, the power output end of the cylinder is connected to the floating joint 11, the floating joint 11 is fixedly connected to the guide block 5, and the cylinder drives the floating joint 11 to move, so that the guide block 5 moves along the guide rail direction of the guide rail 7.

[0058] like Figure 4-6 As shown, the marking assembly also includes a marking pen 10 and a tightening mechanism for securing the marking pen 10. Specifically, as... Figure 7-11 As shown, the guide block 5 is provided with a through hole for the marking pen 10 to pass through, and the tightening mechanism includes a handwheel 22, a clamping block 19, a rotating screw 23 and a limiting ring 20 fixedly sleeved on the rotating screw 23.

[0059] The clamping block 19 is disposed within the through hole, and its inner side has an arc-shaped structure for fitting the marker pen 10. One end of the rotating screw 23 is fixedly connected to the handwheel 22, and the other end passes through the side wall of the guide block 5 and is threadedly connected to the outer side of the clamping block 19. The guide block 5 is also provided with a limiting groove adapted to the limiting ring 20. The limiting groove can restrict the limiting ring 20 from approaching or moving away from the marker pen 10, so that when the handwheel 22 or the rotating screw 23 rotates in different directions, the clamping block 19 has a tendency to approach or separate from the marker pen 10.

[0060] like Figure 4 , 5 As shown, the bracket 1 is also provided with a sleeve 8 that cooperates with the tip of the marking pen 10. The marking pen 10 has a first state and a second state. When the marking pen 10 is in the first state, the tip of the marking pen 10 is retracted into the sleeve 8. When the marking pen 10 is in the second state, the tip of the marking pen 10 protrudes from the sleeve 8 and contacts the area on the PCB board to be inspected that is opposite to the optical head 2.

[0061] like Figure 4 , 5 As shown, the marking assembly also includes a cover 81 that mates with the end of the sleeve 8. When the marking pen 10 is in a first state, the cover 81 is connected to the sleeve 8; when the marking pen 10 is in a second state, the cover 81 is separated from the sleeve 8.

[0062] like Figure 4-6As shown, the marking assembly also includes a connecting rod 14 and a limiting member 16. The cover 81 is disposed at one end of the connecting rod 14, and the other end of the connecting rod 14 is rotatably connected to the bracket 1. The limiting member 16 is fixed in relative position to the guide block 5, and the side of the limiting member 16 away from the guide block 5 is always in contact with the connecting rod 14.

[0063] Specifically, when the marker pen 10 is in the first state, the cover 81 is sealed to the end of the sleeve 8; during the process of the marker pen 10 switching from the first state to the second state, the limiting member 16 pushes the connecting rod 14 to rotate away from the sleeve 8, and drives the cover 81 to leave the area opposite to the pen tip when or before the pen tip of the marker pen 10 reaches the end face of the sleeve 8.

[0064] like Figure 4-9 As shown, the marking assembly also includes a first return spring 3 and a second return spring 13. Wherein, as... Figure 4 As shown, one end of the first reset spring 3 is fixedly connected to the bracket 1, and the other end is fixedly connected to the guide block 5 or the marker pen 10. Figure 6 As shown, one end of the second reset spring 13 is fixedly connected to the bracket 1, and the other end is fixedly connected to the connecting rod 14.

[0065] In this embodiment, when the marker pen 10 is in the first state, both the first return spring 3 and the second return spring 13 are in their natural state. During the process of the marker pen 10 switching from the first state to the second state, both the first return spring 3 and the second return spring 13 are in a stretched state. Obviously, by changing the setting position of the first return spring 3 and the second return spring 13, it can be made so that during the process of the marker pen 10 switching from the first state to the second state, both are in a compressed state; and the first return spring 3 and the second return spring 13 are two independent components, and the setting method of one being stretched and the other being stretched is also a completely feasible implementation method of the technical solution of the present invention.

[0066] In addition, such as Figure 4 As shown, the marking assembly also includes a cushioning pad and a ring 15 with a brush. The cushioning pad is an elastic ring structure disposed at the lower edge of the sleeve 8 and / or the upper edge of the cover 81, serving both a cushioning and sealing function. The ring 15 is disposed at the upper end of the sleeve 8, and its brush is disposed on the side wall of the marking pen 10 to prevent dust from falling into the sleeve.

[0067] Specifically, when it is necessary to mark defects on the PCB board, under the drive of the cylinder, the guide block 5 drives the marking pen 10 to move downward along the guide rail 7, so that the marking pen 10 can switch from the first state to the second state, and the pen tip of the marking pen 10 can be located at the defect detection point of the optical head 2 on the PCB board, so that the marking pen 10 can mark the defect detection point. After the marking is completed, the marking pen 10 switches from the second state to the first state.

[0068] In one embodiment of the present invention, such as Figure 4-6 As shown, the marking assembly also includes a calibration ruler 4, which is mounted on the guide block 5 and extends in the height direction. The calibration ruler is used to determine the installation height when a marker pen 10 of the same specification is replaced.

[0069] It should be noted that when the marking pen 10 is in operation, it frequently comes into contact with the PCB board for marking. During this process, the reaction force of the PCB board will cause the marking pen 10 to undergo slight displacement. Therefore, the present invention provides a new marking pen structure that is thinner at the top and thicker at the bottom, that is, the pen body of the marking pen 10 has a narrowing structure in the direction away from the pen tip, which can effectively avoid the above situation.

[0070] In addition, such as Figure 7-9 As shown, the upper surface of the cover 81 is provided with a groove 811. When the marking pen 10 leaks ink, the groove 811 can collect the leaked ink and prevent it from contaminating the PCB board.

[0071] In one embodiment of the present invention, an optical detection device is provided, including a bracket 1, a reset bracket, a first reset spring 3, a guide block 5, a marking pen 10, a cylinder, a floating joint 11, a sleeve 8, a connecting rod 14, a second reset spring 13, etc.

[0072] The bracket 1 is equipped with a guide rail 7, and the marker pen 10 is installed inside the guide block 5. The guide block 5 is installed on the guide rail 7 by a slider and can slide along the guide rail 7. A limit screw is installed at the lower end of the guide rail 7 to prevent the slider from sliding out of the guide rail 7 when the marker pen 10 is installed.

[0073] The cylinder is fixedly mounted on the bracket 1 by an auxiliary bracket. The extended end of the cylinder is connected to the floating joint 11, which is fixedly connected to the guide block 5. The function of the floating joint 11 is to allow a small angular deviation between the trajectory of the cylinder extension and the trajectory of the guide block 5, thereby improving the life of the cylinder.

[0074] The reset bracket is fixedly connected to the bracket 1. One end of the first reset spring 3 is connected to the reset bracket, and the other end is connected to the guide block 5. Its function is to balance the weight of the marker pen 10 when the marker pen 10 changes from the non-working state (i.e., the second state) to the working state (i.e., the first state), so that the cylinder can easily drive the marker pen 10 to reset.

[0075] The sleeve 8 is fixedly connected to the bottom of the bracket 1. A ring 15 with a brush is glued to the upper end of the sleeve 8, i.e., a circular ring. The brush on the circular ring can prevent dust from falling into the sleeve 8 and can seal the upper surface of the pen tip of the marker pen 10.

[0076] like Figure 3 As shown, connecting rod 14 is rotatably connected to bracket 1 via bearing. A connecting block is fixedly installed at the lower end of guide block 5, and a roller with an inner bearing, i.e., a limiting member 16, is connected to the connecting block. This roller is always in contact with connecting rod 14. One end of the second return spring 13 is connected to bracket 1, and the other end is connected to connecting rod 14. When the marker pen 10 is in the working state, the second return spring 13 is tightened. When the cylinder drives the guide block 5, on which the marker pen 10 is installed, back to the non-working state, the second return spring 13 pulls connecting rod 14 to the initial position, i.e. Figure 2 At the position shown in the middle connecting rod 14, the cover 81 at the bottom of the connecting rod 14 seals the bottom of the sleeve 8.

[0077] like Figure 3 As shown, a circular groove 811 is also provided on the sealing plate, i.e., the cover 81, of the bottom plate of the connecting rod 14. When ink leakage occurs in the marker pen 10, the leaked ink can be collected in the circular groove 811 to prevent contamination of the PCB board. In addition, a rubber buffer pad is glued to the bottom of the sleeve 8 to buffer the impact on the sleeve 8 when the connecting rod 14 resets. The buffer pad is made of rubber, which can better achieve the sealing effect. The upper and lower seals of the sleeve 8 are achieved by the ring 15 and the buffer pad, avoiding the problem of the marker pen 10 tip drying out due to air convection.

[0078] like Figure 4 , 5As shown in Figure 6, the tightening mechanism includes a handwheel 22, a limiting ring 20, a limiting pin, a clamping block 19, and a rotating screw 23. One end of the handwheel 22 is fixedly connected to the rotating screw 23, and the other end of the rotating screw 23 is connected to the clamping block 19. The clamping block 19 has an arc surface to increase the contact area with the marker pen 10. A limiting ring 20 is installed in the middle of the rotating screw 23. The limiting ring 20 is located inside the guide block 5 and has a groove for placing the limiting pin. When the limiting pin is engaged, the clamping mechanism tightens. When the positioning pin is placed in the groove, the limiting ring 20 is fixed to the rotating screw 23, so that the rotating screw 23 and the limiting ring 20 can only rotate and cannot move left or right. Furthermore, the two outer sides of the limiting ring 20 are in contact with the inner side of the limiting groove wall of the guide block 5 and there is a certain friction. When the handwheel 22 is tightened by hand, the clamping block 19 clamps one side of the marking pen 10, and the other side of the marking pen 10 contacts the guide block 5. In this way, the marking pen 10 can be fixed in the guide block 5.

[0079] A calibration ruler 4 is also installed on the guide block 5. The upper surface of the calibration ruler 4 is flush with the upper surface of the marker pen 10. When the ink in the marker pen 10 is used up, loosen the handwheel 22, remove the old marker pen 10, and then insert the new marker pen 10 into the guide block 5, ensuring that the upper surface of the calibration ruler 4 is flush with the upper surface of the marker pen 10. Finally, tighten the handwheel 22 to fix the new marker pen 10 in place. Figure 6 As shown, a U-shaped groove and a screw that fits the U-shaped groove are also provided on the calibration ruler 4. When the length of the marker pen 10 before and after replacement is different, the relative position of the calibration ruler 4 and the guide block 5 can be adjusted to ensure that the marking position of the marker pen 10 on the PCB board is consistent with the image acquisition position of the optical head 2.

[0080] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0081] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An optical inspection device, characterized in that, The optical inspection device, used for detecting defects in PCB boards, includes optical components and marking components disposed on the optical components, wherein... The optical assembly includes an optical head (2) for detecting the location of defects on the PCB board; The marking assembly includes a bracket (1), a marking pen (10), and a driving mechanism (9). The bracket (1) is fixedly disposed relative to the optical head (2). The bracket (1) is provided with a guide rail (7) and a guide block (5) that cooperates with the guide rail (7). The marking pen (10) is fixedly connected to the guide block (5). The bracket (1) is also provided with a sleeve (8) that cooperates with the tip of the marking pen (10). The power output end of the driving mechanism (9) is fixedly connected to the guide block (5). Under the drive of the driving mechanism (9), the guide block (5) drives the marking pen (10) to move along the guide rail (7), so that the marking pen (10) can switch from a first state to a second state. When the marking pen (10) is in the first state, the tip of the marking pen (10) is retracted into the sleeve (8); when the marking pen (10) is in the second state, the tip of the marking pen (10) protrudes out of the sleeve (8) and contacts the area on the PCB board to be tested that is opposite to the optical head (2). The marking assembly also includes a cover (81) that engages with the end of the sleeve (8); when the marking pen (10) is in a first state, the cover (81) is connected to the sleeve (8); when the marking pen (10) is in a second state, the cover (81) is separated from the sleeve (8). The marking assembly also includes a connecting rod (14) and a limiting member (16). The cover (81) is disposed at one end of the connecting rod (14), and the other end of the connecting rod (14) is rotatably connected to the bracket (1). The limiting member (16) is fixed in relative position to the guide block (5), and the side of the limiting member (16) away from the guide block (5) is always in contact with the connecting rod (14). When the marking pen (10) is in the first state, the cover (81) is sealed to the end of the sleeve (8). During the process of the marking pen (10) switching from the first state to the second state, the limiting member (16) pushes the connecting rod (14) to rotate away from the sleeve (8), and drives the cover (81) to leave the area opposite to the pen tip when or before the pen tip of the marking pen (10) reaches the end face of the sleeve (8). The marking assembly also includes a second return spring (13), one end of which is fixedly connected to the bracket (1) and the other end of which is fixedly connected to the connecting rod (14). When the marking pen (10) is in the first state, the second return spring (13) is in the natural state.

2. The optical inspection device according to claim 1, characterized in that, The cover (81) is located at the lower port of the sleeve (8), and the upper surface of the cover (81) is provided with a groove (811).

3. The optical inspection device according to claim 1, characterized in that, The guide block (5) is provided with a through hole for the marker pen (10) to pass through. The marking assembly also includes a tightening mechanism for fixing the marker pen (10). The tightening mechanism includes a handwheel (22), a clamping block (19), a rotating screw (23), and a limiting ring (20) fixedly sleeved on the rotating screw (23). The clamping block (19) is set in the through hole, and its inner side is provided with an arc-shaped structure for fitting the marking pen (10). One end of the rotating screw (23) is fixedly connected to the handwheel (22), and the other end passes through the side wall of the guide block (5) and is connected to the outer side of the clamping block (19) by thread engagement. The guide block (5) is also provided with a limiting groove that is adapted to the limiting ring (20). The limiting groove restricts the limiting ring (20) from approaching or moving away from the marker pen (10), so that when the handwheel (22) or the rotating screw (23) rotates in different directions, the clamping block (19) has a tendency to close or separate relative to the marker pen (10).

4. The optical inspection device according to claim 1, characterized in that, The marking assembly also includes a first reset spring (3), one end of which is fixedly connected to the bracket (1), and the other end is fixedly connected to the guide block (5) or the marking pen (10). When the marking pen (10) is in the first state, the first reset spring (3) is in the natural state.

5. The optical inspection device according to claim 1, characterized in that, The marking assembly also includes a cushioning pad, which is an elastic annular structure disposed at the lower port edge of the sleeve (8) and / or the upper edge of the cover (81).

6. The optical inspection device according to claim 1, characterized in that, The marking assembly also includes a ring (15) with a brush, the ring (15) being disposed at the upper port of the sleeve (8), and the brush being disposed on the side wall of the marking pen (10).

7. The optical inspection device according to claim 1, characterized in that, The marking assembly also includes a calibration ruler (4) mounted on the guide block (5) and extending in the height direction, the calibration ruler being used to determine the installation height when a marker pen (10) of the same specification is replaced.

8. The optical inspection device according to claim 1, characterized in that, The body of the marking pen (10) is narrowed in the direction away from the pen tip.

9. The optical inspection device according to claim 1, characterized in that, The driving mechanism (9) is a cylinder, and the power output end of the cylinder is connected to the floating joint (11). The floating joint (11) is fixedly connected to the guide block (5).

10. The optical inspection device according to any one of claims 1 to 9, characterized in that, The marking assembly is adjustablely fixed to the optical assembly via a mounting base (25), a mounting plate (26), a first locking screw (27), and a second locking screw (28), wherein, The mounting base (25) is fixedly connected to the optical component; The mounting base (25) is provided with a threaded hole that mates with the first locking screw (27), and the mounting plate (26) is provided with an arc-shaped adjustment through hole that matches the first locking screw (27). The first locking screw (27) is used to press the mounting plate (26) and the mounting base (25), and the first locking screw (27) can be located at any position of the arc-shaped adjustment through hole. The mounting plate (26) is provided with a threaded hole that mates with the second locking screw (28), and the bracket (1) is provided with a strip-shaped adjustment through hole that is adapted to the second locking screw (28). The second locking screw (28) is used to press the bracket (1) and the mounting plate (26), and the second locking screw (28) can be located at any position of the strip-shaped adjustment through hole.

Images