Optical inspection equipment

Abstract

The present application provides an optical inspection device for inspecting circuit boards, comprising: a board-straightening mechanism for aligning a plurality of circuit boards along a first direction; a pressure roller mechanism connected to the discharge end of the board-straightening mechanism for leveling the circuit boards; a conveying mechanism connected to the discharge end of the pressure roller mechanism for conveying the circuit boards at a preset speed; and an inspection mechanism disposed on the pressure roller mechanism for inspecting the surface of the circuit boards while the conveying mechanism is conveying the circuit boards. The present application provides an optical inspection device for efficiently and quickly inspecting circuit boards while ensuring inspection accuracy.

Description

Technical Field

[0001] The present application relates to the field of detection equipment, and in particular to an optical detection equipment. Background Art

[0002] In online automatic optical inspection (AOI) equipment for printed circuit boards (PCBs) and flexible printed circuits (FPCs), it is necessary to perform optical inspection on the circuit boards. How to propose an optical inspection device that can perform efficient and rapid inspection while ensuring inspection accuracy has become a technical problem that needs to be solved. Summary of the Invention

[0003] The present application provides an optical inspection device that can perform efficient and rapid inspection on a circuit board while ensuring inspection accuracy.

[0004] The present invention provides an optical inspection device for inspecting a circuit board, including:

[0005] A board aligning mechanism, configured to align the plurality of circuit boards along a first direction;

[0006] A pressing wheel mechanism, the pressing wheel mechanism being connected to the discharge end of the board-straightening mechanism and being used to flatten the circuit board;

[0007] a conveying mechanism, the conveying mechanism being connected to the discharge end of the pressing wheel mechanism and being used to convey the circuit board at a preset speed; and

[0008] A detection mechanism is provided on the pressing wheel mechanism, and is used to detect the board surface of the circuit board during the process of the conveying mechanism conveying the circuit board.

[0009] The optical inspection equipment provided in the embodiment of the present application can improve the optical inspection efficiency of each circuit board by aligning the long side or short side of the circuit board along the reference side of the whole board mechanism on the whole board mechanism, making the circuit board parallel or flat relative to the horizontal plane through the pressure wheel mechanism, clamping the circuit board through the conveying mechanism, and moving the circuit board at a stable speed, and photographing the image of the circuit board through the inspection mechanism during the process of conveying the circuit board by the conveying mechanism. At the same time, the conveying mechanism moves in a manner of clamping the circuit board, which can ensure the uniform movement of the circuit board, thereby ensuring the clarity of the optical inspection image, and thereby ensuring the accuracy of the optical inspection equipment in obtaining defects in the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 It is a structural schematic diagram of an optical detection device provided in an embodiment of the present application.

[0012] Figure 2 This is a structural diagram of a whole-board mechanism provided in an embodiment of the present application.

[0013] Figure 3 yes Figure 2 A structural diagram of a set of adjustment mechanism groups.

[0014] Figure 4 yes Figure 3 Schematic diagram of the structure of an adjustment mechanism at a deflection angle.

[0015] Figure 5 yes Figure 3 A schematic diagram of the structure of an adjustment mechanism in another deflection angle.

[0016] Figure 6 yes Figure 4 A cross-sectional view of the adjustment mechanism is provided.

[0017] Figure 7 yes Figure 4 A side view of the adjustment mechanism is provided.

[0018] Figure 8 It is a structural schematic diagram of a connecting wheel mechanism and a pressing wheel mechanism provided in an embodiment of the present application.

[0019] Figure 9 It is a side view of a connecting wheel mechanism and a pressing wheel mechanism provided in an embodiment of the present application.

[0020] Figure 10 This is a side view of an optical detection device provided in an embodiment of the present application.

[0021] Figure 11 It is a structural schematic diagram of a detection mechanism and a pressure wheel assembly provided in an embodiment of the present application.

[0022] Figure 12 It is a side view of a detection mechanism provided in an embodiment of the present application.

[0023] Figure 13 yes Figure 12 A schematic structural diagram of a portion of a camera assembly from a first perspective is provided.

[0024] Figure 14 yes Figure 12 A schematic structural diagram of a second perspective of a portion of a camera assembly is provided.

[0025] Figure 15 It is a structural schematic diagram of a transmission mechanism and a connecting wheel mechanism provided in an embodiment of the present application.

[0026] Figure 16 This is a structural diagram of a transmission mechanism provided in Example 1 of the present application.

[0027] Figure 17 yes Figure 16 A partial enlarged view of the transmission mechanism.

[0028] Figure 18 yes Figure 17 Schematic diagram of the structure of the first conveying component clamping the circuit board.

[0029] Figure 19 yes Figure 18 Schematic diagram of the structure of the first clamp in.

[0030] Figure 20 yes Figure 17 Schematic diagram of the structure of the second conveying component clamping the circuit board.

[0031] Figure 21 yes Figure 20 Schematic diagram of the structure of the second clamp in.

[0032] Figure 22 This is a structural diagram of a transmission mechanism provided in Example 2 of the present application.

[0033] Figure 23 yes Figure 22 A partial enlargement of the transmission mechanism in Figure 1 .

[0034] Figure 24 yes Figure 22 A partial enlargement of the transmission mechanism in Figure 2 .

[0035] Figure 25 yes Figure 24 A partially enlarged view of the first transmission component and the second transmission component.

[0036] Figure 26 yes Figure 24 Schematic diagram of the structure of the first conveying component clamping the circuit board.

[0037] Figure 27 yes Figure 26 Schematic diagram of the structure of the first clamp in.

[0038] Figure 28 yes Figure 24 Schematic diagram of the structure of the second conveying component clamping the circuit board.

[0039] Figure 29 yes Figure 28 Schematic diagram of the structure of the second clamp in.

[0040] Figure 30 It is a side view of a material unloading and conveying mechanism provided in an embodiment of the present application. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described are only part of the embodiments of the present application, not all of the embodiments. The embodiments listed in the present application can be appropriately combined with each other.

[0042] The present embodiment provides an optical inspection device 1000. Optical inspection device 1000 can be used to inspect circuit boards 2000 for defects, such as open circuits, short circuits, micro-shorts, excess copper, burrs, dirt, pinholes, and gaps, which can affect the performance of circuit boards 2000. This allows for the screening of defective circuit boards 2000. Of course, optical inspection device 1000 can also be used to inspect other structures or components.

[0043] See also Figure 1 The optical inspection device 1000 provided in this application is described by taking the inspection of the circuit board 2000 as an example. The optical inspection device 1000 includes a whole board mechanism 100, a connecting wheel mechanism 300, a pressing wheel mechanism 400, a transmission mechanism 600, a detection mechanism 800 and a blanking conveying mechanism 900. Among them, the whole board mechanism 100, the connecting wheel mechanism 300, the pressing wheel mechanism 400, the transmission mechanism 600, and the blanking conveying mechanism 900 are connected in sequence, and the detection mechanism 800 is arranged above and below the pressing wheel mechanism 400 (with Figure 1 The z-axis direction is the reference) on both sides.

[0044] For ease of description, the present embodiment defines the "front section" as the source structure in the conveying direction of the circuit board 2000. The "rear section" is the destination structure in the conveying direction of the circuit board 2000. The present embodiment defines the end of each mechanism connected to the "front section" as the "feed end," and the end of each mechanism connected to the "rear section" as the "discharge end."

[0045] For ease of description, the direction in which the board assembly mechanism 100, the pinch roller mechanism 400, and the conveying mechanism 600 are sequentially connected is defined as the X-axis direction. The direction perpendicular to the X-axis direction within the conveying surface 113 of the circuit board 2000 is defined as the Y-axis direction. The optical inspection device 1000 is positioned on a horizontal surface, and the height direction of the optical inspection device 1000 is defined as the Z-axis direction. The direction indicated by the arrow is the positive direction. The X-axis, Y-axis, and Z-axis directions are perpendicular to each other. The first direction is the X-axis direction, and the second direction is the Z-axis direction.

[0046] See also Figure 1 The board alignment mechanism 100 is used to align the plurality of circuit boards 2000 along a first direction (the X-axis). The function of the board alignment mechanism 100 is to automatically align the X-axis of the circuit boards 2000 automatically transferred from the front stage with the reference edge 117, providing a reference for the subsequent optical automatic inspection, and then transfer the circuit boards 2000 to the pressing roller mechanism 400.

[0047] See also Figure 1 The connecting wheel mechanism 300 is connected to the discharge end of the whole board mechanism 100 , and the connecting wheel mechanism 300 is used to transfer the circuit board 2000 to the pressing wheel mechanism 400 .

[0048] See also Figure 1 The pressing wheel mechanism 400 is connected to the discharge end of the connecting wheel mechanism 300. The pressing wheel mechanism 400 is used to flatten the circuit board 2000. Specifically, the pressing wheel mechanism 400 can provide a flat image acquisition area for the detection mechanism 800, ensuring the flatness of the circuit board 2000 as it passes through the image acquisition area.

[0049] The conveyor mechanism 600 is connected to the discharge end of the pinch roller mechanism 400 and is used to convey the circuit board 2000 at a preset speed. The preset speed is a uniform speed or a near-uniform speed. The conveyor mechanism 600 can provide a stable conveying speed for the inspection mechanism 800, for example, a constant speed or a high-precision conveying speed that accurately matches the actual speed with the required theoretical speed. The image acquisition system matches the conveying speed of the circuit board 2000, obtaining a true image of the circuit board 2000 and providing an image basis for the inspection software.

[0050] The detection mechanism 800 is provided on the pressing wheel mechanism 400 and is used to detect the surface of the circuit board 2000 during the process of the circuit board 2000 being transported by the transport mechanism 600. The detection mechanism 800 can accurately obtain image information of the circuit board 2000.

[0051] The optical inspection device 1000 provided in the embodiment of the present application aligns the long side or short side of the circuit board 2000 along the reference edge 117 of the whole board mechanism 100 on the whole board mechanism 100, makes the circuit board 2000 parallel or flat relative to the horizontal plane through the pressure wheel mechanism 400, clamps the circuit board 2000 through the conveying mechanism 600, and moves the circuit board 2000 at a stable speed, and captures the image of the circuit board 2000 through the inspection mechanism 800 during the process of the conveying mechanism 600 conveying the circuit board 2000. This can improve the optical inspection efficiency of each circuit board 2000, and at the same time, the conveying mechanism 600 moves in a straight line by clamping the circuit board 2000, which can ensure the linear and uniform motion of the circuit board 2000, thereby ensuring the clarity of the optical inspection image, and thereby ensuring the accuracy of the optical inspection equipment 1000 in obtaining defects in the circuit board 2000.

[0052] The unloading conveyor mechanism 900 is provided below the conveying mechanism 600. While the conveying mechanism 600 is removing the circuit board 2000 from the pinch roller mechanism 400, the detection mechanism 800 captures an image. After the conveying mechanism 600 removes the circuit board 2000 from the pinch roller mechanism 400, the circuit board 2000 is released into the unloading conveyor mechanism 900.

[0053] The embodiments of the present application respectively provide specific descriptions of the above-mentioned whole plate mechanism 100 , connecting wheel mechanism 300 , pressing wheel mechanism 400 , transmission mechanism 600 , detection mechanism 800 and unloading conveying mechanism 900 .

[0054] First, the present application provides examples to illustrate the structure of the whole panel mechanism 100. Of course, the present application includes but is not limited to the whole panel mechanism 100 provided in the following embodiments.

[0055] See also Figure 2 The embodiment of the present application provides a whole board mechanism 100 including a machine platform 101, a conveying platform 109, a plurality of sensors 119, an adjustment mechanism assembly 121 and a driving assembly. The driving assembly includes a first driving assembly 187 and a second driving assembly 189.

[0056] See also Figure 3 The adjustment mechanism combination 121 includes multiple rows of adjustment mechanism groups 123. Each row of adjustment mechanism groups 123 (also called each group of adjustment mechanism groups 123) includes multiple adjustment mechanisms 125.

[0057] See also Figure 2 For ease of description, the conveying direction of circuit board 2000 on conveyor platform 109 is defined as the X-axis direction. The direction perpendicular to the X-axis direction on conveying surface 113 of conveyor platform 109 is defined as the Y-axis direction. The thickness direction of conveyor platform 109 is defined as the Z-axis direction. The direction indicated by the arrow is the forward direction, and the direction opposite to the arrow is the reverse direction.

[0058] See also Figure 2 The machine 101 includes a base 103 and a first support platform 105 and a second support platform 107 integrally formed with the base 103. The first support platform 105 and the second support platform 107 are arranged along the Y-axis. Each of the first support platform 105 and the second support platform 107 is provided with a plurality of fixing structures, which are used to position the ends of the adjustment mechanism assembly 121 so that the adjustment mechanism assembly 121 can be installed on the machine 101. A gap is provided between the adjustment mechanism assembly 121 and the base 103 to facilitate installation or maintenance of the adjustment mechanism assembly 121 through this gap.

[0059] See also Figure 2 , the conveying platform 109 is plate-shaped. The conveying platform 109 is arranged on the machine 101. The conveying platform 109 is located on the side of the adjustment mechanism assembly 121 away from the base 103. The first support platform 105 and the second support platform 107 fix the opposite ends of the conveying platform 109. A receiving space is formed between the conveying platform 109 and the machine 101. Specifically, the base 103, the first support platform 105, the second support platform 107 and the machine 101 surround and form a receiving space. Multiple groups of the adjustment mechanisms 125 are all arranged in the receiving space. The surface of the conveying platform 109 away from the adjustment mechanism assembly 121 is the surface for conveying the circuit board 2000, which is recorded as the conveying surface 113 in this application.

[0060] See also Figure 2 The conveying platform 109 is provided with a plurality of through holes 111 communicating with the receiving space, and each through hole 111 passes through the conveying platform 109 along the Z axis.

[0061] See also Figure 2 The conveying platform 109 also includes a strip boss 115 provided on one side of the conveying surface 113 (provided on the side of the conveying platform 109 away from the receiving space). The strip boss 115 is arranged close to the first support platform 105. The strip boss 115 extends along the X-axis direction. The strip boss 115 protrudes relative to the conveying surface 113. The surface of the strip boss 115 facing the direction of the conveying surface 113 is a reference plane or reference edge 117. A plurality of sensors 119 are provided on the strip boss 115. The plurality of sensors 119 are arranged along the reference edge 117. The sensor 119 is used to detect whether the board to be conveyed (i.e., the circuit board 2000) is arranged along the reference edge 117. The sensor 119 includes but is not limited to an infrared sensor, a brightness sensor, etc.

[0062] Adjustment mechanism 125 includes a transmission wheel 127. At least a portion of the rolling surface of transmission wheel 127 extends out of conveying surface 113 through through-hole 111. In other words, multiple roller surfaces of transmission wheel 127 are exposed on conveying surface 113. When circuit board 2000 is placed on these roller surfaces, the roller surfaces can be driven to roll, thereby moving circuit board 2000. Changing the direction of the roller surfaces can also change the direction of movement of circuit board 2000.

[0063] The driving assembly is connected to the transmission wheel 127 to drive the transmission wheel 127 to roll and / or rotate, so that the transmission wheel 127 conveys the circuit board 2000 and places the circuit board 2000 along the reference edge 117 .

[0064] The whole-board mechanism 100 provided in the embodiment of the present application sets a reference edge 117 on the conveying table 109 and sets a plurality of sensors 119 on the reference edge 117, sets an adjustment mechanism 125 including a transmission wheel 127 and a driving component, and sets the driving component to drive the transmission wheel 127 to convey the circuit board 2000 toward the reference edge 117 and arrange the circuit board 2000 along the reference edge 117, so that the circuit board 2000 is aligned with the reference edge 117, thereby achieving strict arrangement of multiple circuit boards 2000 along the reference edge 117, so as to facilitate subsequent efficient processing of the circuit boards 2000. The whole-board mechanism 100 of the present application has a high degree of automation, saves time and labor costs.

[0065] The sensor 119 includes at least two light sensors. The light sensors are configured to transmit detection light toward the conveyor platform 109. The detection light includes at least one of infrared light and visible light. When the circuit board 2000 is positioned along the reference edge 117, at least two of the sensors 119 receive the detection light reflected by the circuit board 2000.

[0066] For example, the sensor 119 may be a FU-35TZ small light spot reflective sensor, which is insensitive to the color of the circuit board 2000. Therefore, it will not be affected by dust and the color of the circuit board 2000, thereby improving the stability of the performance of the entire board.

[0067] The detection direction of the sensor 119 is toward the gap between the conveying surface 113 and the reference edge 117 or the conveying surface 113. Figure 2 In the embodiment, the detection direction of multiple sensors 119 is downward along the Z-axis (i.e., in the opposite direction of the Z-axis). When two or more sensors 119 detect circuit board 2000, it means that the reference edge of circuit board 2000 is in contact with reference edge 117, and the orientation and position of circuit board 2000 are both accurate.

[0068] Of course, in other embodiments, sensor 119 may also include at least two pressure sensors. These pressure sensors are patch-type and can be attached to reference edge 117. They can sensitively detect whether circuit board 2000 abuts against reference edge 117. When one side of circuit board 2000 abuts against reference edge 117, at least two spaced-apart pressure sensors receive a pressure signal. In other words, when at least two spaced-apart pressure sensors receive a pressure signal, it indicates that one side of circuit board 2000 abuts against reference edge 117.

[0069] The structure of the adjustment mechanism 125 provided in the embodiment of the present application is described below with reference to the accompanying drawings.

[0070] See also Figure 4 The adjustment mechanism 125 includes a transmission wheel 127 , a first transmission assembly 137 , a second transmission assembly 147 and a third transmission assembly 155 .

[0071] For details, please refer to Figure 4 and Figure 2 The transmission wheel 127 is a roller. The axis of the rotation axis of the transmission wheel 127 is parallel to the conveying surface 113 of the conveying platform 109. The roller surface of the transmission wheel 127 at least partially extends beyond the conveying surface 113 of the conveying platform 109. When the circuit board 2000 is placed on the conveying platform 109, the circuit board 2000 contacts the roller surface of the transmission wheel 127, and is then driven to move by the friction force of the transmission wheel 127.

[0072] The roller surface of the transmission wheel 127 is provided with a straight knurling structure, which can increase the friction required for the transmission of the circuit board 2000, thereby increasing the friction transmission efficiency between the transmission wheel and the circuit board 2000. Specifically, the roller surface of the transmission wheel 127 is provided with a plurality of grooves, so that the roller surface of the transmission wheel 127 forms a plurality of bosses. In this way, the friction of the transmission wheel 127 in transmitting the plate can be increased, so as to better transmit the plate, etc. The length of the grooves on the roller surface of the transmission wheel 127 (in the axial direction of the transmission wheel 127) is relatively short, so that the processing of the bosses is relatively easy. Optionally, the bosses on the roller surface of the transmission wheel 127 can be mass-produced using a plastic mold to overcome the problem that the length of the grooves of the conventional transmission wheel 127 (in the axial direction of the transmission wheel 127) is relatively long, and adding bosses to the entire outer diameter will significantly increase the manufacturing cost.

[0073] Optionally, one through hole 111 in the conveying platform 109 may correspond to one transmission wheel 127 or multiple coaxially arranged transmission wheels 127 , which is not limited in the present application.

[0074] See also Figure 4The first transmission assembly 137 is fixedly connected to the rotating shaft of the transmission wheel 127. When the first transmission assembly 137 rotates, the first transmission assembly 137 can drive the transmission wheel 127 to rotate, so that the circuit board 2000 moves or is transmitted to the rear section.

[0075] See also Figure 4 The second transmission assembly 147 is in transmission connection with the first transmission assembly 137. Transmission connection includes but is not limited to meshing connection, belt transmission connection, roller-to-roller transmission connection, etc. When the second transmission assembly 147 rotates, it can drive the first transmission assembly 137 to rotate. The rotation axis of the second transmission assembly 147 intersects or is perpendicular to the rotation axis of the transmission wheel 127. In this embodiment, the rotation axis of the transmission wheel 127 is parallel to the conveying surface 113 of the conveying platform 109. The rotation axis direction of the second transmission assembly 147 is perpendicular to the conveying surface 113 of the conveying platform 109.

[0076] See also Figure 4 , the third transmission assembly 155 is in transmission connection with the second transmission assembly 147. Transmission connection includes but is not limited to meshing connection, belt transmission connection, roller-to-roller transmission connection, etc. The first drive assembly 187 is connected to the third transmission assembly 155, so that the third transmission assembly 155 drives the second transmission assembly 147 to rotate under the action of the first drive assembly 187, so that the first transmission assembly 137 rotates at least partially around the rotation axis of the transmission wheel 127, thereby driving the transmission wheel 127 to rotate. Optionally, the axial direction of the third transmission assembly 155 is parallel to the conveying surface 113 of the conveying platform 109. The axial direction of the third transmission assembly 155 is parallel to, intersecting with, or collinear with the rotation axis of the transmission wheel 127. Optionally, the first drive assembly 187 can be a motor. Of course, in other embodiments, the first drive assembly 187 can also be a cylinder, etc.

[0077] See also Figure 4 and Figure 5 The adjustment mechanism 125 further includes a fourth transmission assembly 161, which is fixedly connected to the first transmission assembly 137. A second drive assembly 189 is connected to the fourth transmission assembly 161, so that the fourth transmission assembly 161, under the action of the second drive assembly 189, drives the first transmission assembly 137 and the transmission wheel 127 to deflect about the Z-axis. Optionally, the second drive assembly 189 may be a cylinder. Of course, in other embodiments, the second drive assembly 189 may also be a motor, etc.

[0078] When the transmission wheel 127 deflects around the Z-axis under the action of the second driving component 189, the direction of the transmission wheel 127 changes, thereby changing the direction of the friction force of the transmission wheel 127 on the circuit board 2000, thereby changing the moving direction of the circuit board 2000, and ultimately changing the transmission angle of the circuit board 2000.

[0079] See also Figure 2 and Figure 4 Since the transmission wheel 127 can rotate relative to the conveying platform 109, a gap is reserved between the transmission wheel 127 and the wall of the through hole 111 so that the transmission wheel 127 can rotate in the through hole 111. Optionally, the through hole 111 is circular. In this way, there is a gap between the transmission wheel 127 and the wall of the through hole 111. Furthermore, the adjustment mechanism 125 is provided with a rotating plate 129 fixedly connected to the support seat 135 of the transmission wheel 127 (the support seat 135 will be described later), and the rotating plate 129 is provided in the through hole 111 and can rotate in the through hole 111. An opening 131 is provided in the rotating plate 129, and the transmission wheel 127 is transmitted through the opening 131. The rotating plate 129 fills the gap between the transmission wheel 127 and the wall of the through hole 111, so that the sealing between the transmission wheel 127 and the wall of the through hole 111 is stronger, reducing dust or impurities from falling into the adjustment mechanism 125 through the above-mentioned gap. At the same time, the rotating plate 129 can rotate along with the transmission wheel 127 and thus will not interfere with the rotation of the transmission wheel 127 .

[0080] As described above, the adjustment mechanism 125 provided in the embodiment of the present application has the function of conveying the circuit board 2000 and changing the conveying angle of the circuit board 2000. When the incoming direction and angle of the circuit board 2000 are irregular, the first drive assembly 187 can drive the transmission wheel 127 to rotate to convey the circuit board 2000 to the subsequent stage; during the process of conveying the circuit board 2000, the second drive assembly 189 changes the angle of the transmission wheel 127 to change the conveying direction of the circuit board 2000 to the target direction, so that each circuit board 2000 is arranged neatly along the reference edge 117, achieving the goal of accurately aligning the images captured by the subsequent inspection mechanism station with the standard image for the entire board of multiple circuit boards 2000, reducing the occurrence of undesirable phenomena such as false detection and missed detection, and improving inspection efficiency.

[0081] In the present application, the method of leveling the irregular circuit board 2000 obtained from the previous etching line with the reference edge 117 in the X-axis direction includes but is not limited to the following implementations.

[0082] Optionally, the first drive component 187 is used to realize the rearward rotation of each transmission wheel 127, and the circuit board 2000 is first transferred to the X-axis direction to the reference edge 117 at a certain angle (0-180°). When one corner of the circuit board 2000 reaches the reference edge 117, the sensor 119 detects the circuit board 2000 and generates a feedback signal. Then, the second drive component 189 is used to adjust the angle of the transmission wheel 127 to be parallel to the reference edge 117 (i.e., along the X-axis direction). All the transmission wheels 127 move in this manner, and finally the circuit board 2000 moves in the X-axis direction parallel to the reference edge 117, aligns with the reference edge 117, and neatly enters the automatic optical detection mechanism station, providing a correct acquisition state for the image acquisition system of the automatic optical detection mechanism station.

[0083] Optionally, before the circuit board 2000 is sent to the conveying table 109, the direction of the transmission wheel 127 of the first part of the conveying table 109 close to the front section (the extension direction of the roller surface on the conveying surface 113) is set to be inclined relative to the X-axis direction. For example, the direction of the transmission wheel 127 of this part is deflected 45° from the positive direction of the X-axis to the reverse direction of the Y-axis, and the transmission wheel 127 of this part rotates in the direction of the rear section. The setting direction of the transmission wheel 127 of the second part of the conveying table 109 (close to the rear section) is parallel to the X-axis direction, and the transmission wheel 127 of this part rotates in the direction of the rear section. The ratio of the number of the transmission wheels 127 of the first part to the number of the transmission wheels 127 of the second part is not specifically limited here. After a circuit board 2000, whose orientation and position are irregular, arrives from the front section and is transferred to the drive wheels 127 of the first section of the transfer platform 109, the drive wheels 127 gradually move the circuit board 2000 closer to the reference edge 117 until a corner of the circuit board 2000 abuts the reference edge 117. Subsequently, the drive wheels 127 and the abutting force of the reference edge 117 rotate the circuit board 2000 until its reference edge abuts the reference edge 117. At this point, at least two sensors 119 on the strip-shaped boss 115 are able to detect the circuit board 2000, indicating that the reference edge of the circuit board 2000 is positioned along the X-axis. This ultimately allows the circuit board 2000 to move parallel to the reference edge 117 in the X-axis direction, aligning with the reference edge 117 and neatly entering the automated optical inspection (AOI) station, providing a correct acquisition state for the image acquisition system of the AOI station.

[0084] The whole-board mechanism 100 provided in the embodiment of the present application is configured to transmit the driving force to the transmission wheel 127 in sequence through the third transmission component 155, the second transmission component 147 and the first transmission component 137 in the adjustment mechanism 125, so as to drive the transmission wheel 127 to rotate; and to transmit the driving force to the transmission wheel 127 in sequence through the fourth transmission component 161 and the first transmission component 137 in the adjustment mechanism 125, so as to drive the direction of the transmission wheel 127 to change; in this way, multiple groups of adjustment mechanisms 125 transmit the circuit board 2000 to drive the circuit board 2000 to move and change the direction of the circuit board 2000 during the movement, so that the circuit board 2000 is aligned with the reference edge 117, thereby realizing the whole-board of multiple circuit boards 2000, so that the image collected by the automatic optical inspection mechanism station in the later stage is accurately aligned with the standard image, reducing the occurrence of adverse phenomena such as false detection and missed detection, and improving the detection efficiency.

[0085] The specific structure of the adjustment mechanism 125 is described below with reference to the accompanying drawings. Of course, the adjustment mechanism 125 provided by this application includes but is not limited to the following embodiments. Conventional replacements made by those skilled in the art based on the following embodiments fall within the scope of protection of this application.

[0086] See also Figure 2 and Figure 4 The second transmission assembly 147 is disposed on a side of the transmission wheel 127 facing away from the conveying platform 109. The first transmission assembly 137 is located between the conveying platform 109 and the second transmission assembly 147. A portion of the first transmission assembly 137 is disposed in parallel with the transmission wheel 127. The portion of the first transmission assembly 137 disposed in parallel with the transmission wheel 127 is used to drive the transmission wheel 127 to rotate. Another portion of the first transmission assembly 137 is disposed between a portion of the first transmission assembly 137 and the second transmission assembly 147, and is used to engage with the second transmission assembly 147 to achieve linkage between the transmission wheel 127 and the second transmission assembly 147.

[0087] See also Figure 4 and Figure 5 The third transmission assembly 155 is located on the side of the second transmission assembly 147 facing away from the conveyor platform 109. One end of the fourth transmission assembly 161 is connected to the first transmission assembly 137. The other end of the fourth transmission assembly 161 passes over the second transmission assembly 147 and the third transmission assembly 155, and is located on the side of the third transmission assembly 155 facing away from the conveyor platform 109.

[0088] As can be seen from the above design, the transmission wheels 127, first transmission assembly 137, second transmission assembly 147, third transmission assembly 155, and fourth transmission assembly 161 are generally arranged along the Z-axis. This minimizes the space occupied by the adjustment mechanism 125 in the X- and Y-axis directions. Consequently, a larger number of adjustment mechanisms 125 can be positioned beneath the conveyor platform 109, i.e., more transmission wheels 127 can be positioned beneath the conveyor platform 109. More transmission wheels 127 can provide greater transmission force and stability, enabling the transport of heavier or larger circuit boards 2000, and improving the efficiency and smoothness of conveying circuit boards 2000. The adjustment mechanisms 125 occupy a small space within a limited plane. Arranging more adjustment mechanisms 125 within a limited plane increases the number of transmission wheels 127, increasing the contact surface with the conveyed object, further increasing friction on the conveyed object, and thus improving conveying efficiency.

[0089] See also Figure 4 and Figure 5 The adjustment mechanism 125 further includes a support base 135. The support base 135 is used to support the rotating shaft of the transmission wheel 127. The panel-forming mechanism 100 further includes a fixed bracket 136. The fixed bracket 136 is fixedly connected to the machine platform 101. The adjustment mechanism 125 is fixedly mounted on the fixed bracket 136.

[0090] See also Figure 4 and Figure 5 The first transmission assembly 137 includes a first spur gear 139 , a second spur gear 141 and a first bevel gear 143 .

[0091] Please also refer to Figures 4 to 6 The first spur gear 139 is coaxially connected to the transmission wheel 127. The rotation axis of the transmission wheel 127 is parallel to the conveying platform 109. For example, the rotation axis of the transmission wheel 127 can be set along the Y-axis. Of course, the transmission wheel 127 can also be set along the X-axis when driven by the second driving assembly 189.

[0092] The first transmission assembly 137 uses a multi-gear combination, which has a long service life and good stability, so as to make the entire adjustment mechanism 125 more stable. Of course, in other embodiments, the first transmission assembly 137 can also be eliminated and driven by an additional motor directly connected to the shaft of the transmission wheel 127.

[0093] Please also refer to Figures 4 to 6 The second spur gear 141 is located on the side of the first spur gear 139 away from the conveying platform 109. The rotation axis of the second spur gear 141 is parallel to the rotation axis of the first spur gear 139. The second spur gear 141 is meshed with the first spur gear 139.

[0094] Please refer to Figure 7 The second spur gear 141 is spaced apart from and disposed opposite a portion of the support base 135. The first bevel gear 143 is located in the gap between the second spur gear 141 and the support base 135, effectively utilizing the gap and improving the structural compactness of the adjustment mechanism 125. The first bevel gear 143 is coaxially connected to the second spur gear 141. The first bevel gear 143 is meshed with the second transmission assembly 147.

[0095] Please also refer to Figures 4 to 6 , the rotating shaft of the first bevel gear 143 can be fixedly connected to the support base 135. In other words, the transmission wheel 127, the support base 135, and the first transmission assembly 137 form a whole, and the whole can rotate together around the Z-axis direction.

[0096] Further, please refer to Figure 7 The adjustment mechanism 125 also includes a first bearing 145, one end of the first bearing 145 is fixedly connected to the fixed bracket 136, and the other end of the first bearing 145 is sleeved on the end of the support seat 135 away from the transmission wheel 127, so that the support seat 135 can be installed on the fixed bracket 136 and can rotate around the Z axis relative to the fixed bracket 136.

[0097] Please refer to Figure 7 The gear radius of the second spur gear 141 is larger than the gear radius of the first spur gear 139, so that the transmission ratio between the second spur gear 141 and the first spur gear 139 is larger and the space occupied by the first spur gear 139 is smaller, thereby saving the space occupied by the entire adjustment mechanism 125. Of course, in other embodiments, the gear radius of the second spur gear 141 can be equal to or smaller than the gear radius of the first spur gear 139.

[0098] Please refer to Figure 7 The gear radius of the first bevel gear 143 is slightly larger than the gear radius of the second spur gear 141 , so that the first bevel gear 143 can be meshed and connected with the second transmission assembly 147 , and the second transmission assembly 147 will not interfere with the rotation of the second spur gear 141 .

[0099] Of course, in other embodiments, the first spur gear 139 and the second spur gear 141 may be replaced by other numbers of gears, rollers, or pulleys.

[0100] See also Figure 4 The second transmission assembly 147 includes a coaxially connected second bevel gear 149 and a third bevel gear 151. The axial direction of the second bevel gear 149 is along the Z axis. The gear is located on the side of the transmission wheel 127 facing away from the conveyor platform 109. Specifically, the second bevel gear 149 is located on the side of the support base 135 facing away from the conveyor platform 109. The second bevel gear 149 is spaced apart from the support base 135.

[0101] Please also refer to Figure 6 The axial direction of the second bevel gear 149 is perpendicular to the conveying platform 109. The second bevel gear 149 is meshed with the first bevel gear 143. The third bevel gear 151 is located on the side of the second bevel gear 149 away from the transmission wheel 127. The third bevel gear 151 is meshed with the third transmission assembly 155.

[0102] The first bevel gear 143 and the second bevel gear 149 may also be driven by a magnetic wheel set, so that the second transmission assembly 137 can transmit power to the first transmission assembly 147 more efficiently.

[0103] Further, please also refer to Figure 4 and Figure 6 The adjustment mechanism 125 also includes a second bearing 153, one end of the second bearing 153 is fixedly connected to the fixed bracket 136, and the other end of the second bearing 153 is sleeved on the rotating shaft connected between the second bevel gear 149 and the third bevel gear 151, so that the second bevel gear 149 and the third bevel gear 151 can be installed on the fixed bracket 136 and can rotate around the Z axis relative to the fixed bracket 136.

[0104] By setting up the second transmission assembly 147, the second transmission assembly 147 can drive the first bevel gear 143 to rotate when it rotates, and after the transmission of the first spur gear 139 and the second spur gear 141, the rotation of the transmission wheel 127 is realized; at the same time, when the second bevel gear 149 is not rotating, the support base 135 rotates around the Z-axis direction, and the first bevel gear 143 can also rotate around the second bevel gear 149, thereby changing the direction of the transmission wheel 127.

[0105] See also Figure 4 The third transmission assembly 155 includes a driving shaft 157 and a fourth bevel gear 159 fixedly mounted on the periphery of the driving shaft 157. The axial direction of the driving shaft 157 is perpendicular to the axial direction of the second transmission assembly 147. Optionally, the axial direction of the driving shaft 157 extends along the Y-axis. The fourth bevel gear 159 is meshedly connected to the third bevel gear 151.

[0106] When the driving shaft 157 rotates under the action of the first driving assembly 187, the fourth bevel gear 159 rotates about the Y-axis, and the fourth bevel gear 159 drives the third bevel gear 151 to rotate about the Z-axis. The second bevel gear 149 rotates along with the third bevel gear 151, and the second bevel gear 149 drives the first bevel gear 143 to rotate. The second bevel gear 149 drives the second spur gear 141 to rotate. The second spur gear 141 drives the first spur gear 139 to rotate. The first spur gear 139 drives the transmission wheel 127 to rotate.

[0107] See also Figure 4 The fourth transmission assembly 161 includes a third spur gear 163, a rack 165 and a connecting rod 167.

[0108] The third spur gear 163 is located on a side of the third transmission assembly 155 away from the second transmission assembly 147. The rotation axis 179 of the third spur gear 163 is collinear with the rotation axis 179 of the second transmission assembly 147, so that the second transmission assembly 147 and the fourth transmission assembly 161 are compactly arranged in the Z-axis direction.

[0109] Further, please also refer to Figure 4 and Figure 6 The adjustment mechanism 125 also includes a third bearing 175, one end of the third bearing 175 is fixedly connected to the fixed bracket 136, and the other end of the third bearing 175 is sleeved on the rotating shaft connected to the third spur gear 163, so that the third spur gear 163 can be installed on the fixed bracket 136 and can rotate around the Z axis relative to the fixed bracket 136.

[0110] The rack 165 is disposed on one side of the third spur gear 163 and is meshedly connected to the third spur gear 163. Specifically, the rack 165 is disposed along the Y-axis. Of course, in other embodiments, the third transmission assembly 155 may be driven to rotate by a direct motor connection, a motor-connected connecting rod, a motor-connected cam, or other structures.

[0111] Further, see Figure 4 The panel assembly mechanism 100 further includes a moving block 177. A rack 165 is mounted on the moving block 177. The moving block 177 extends along the Y-axis. A second drive assembly 189 is connected to the moving block 177 to drive the moving block 177 along the Y-axis, thereby driving the rack 165 along the Y-axis, and further driving the third spur gear 163 to rotate. The drive mechanism of the rack 165 and the third spur gear 163 provides more stable motion.

[0112] One end of the connecting rod 167 is fixedly connected to the end of the support base 135 away from the transmission wheel 127. The other end of the connecting rod 167 passes over the second transmission assembly 147 and is fixedly connected to the shaft of the third spur gear 163.

[0113] For details, please refer to Figure 5 The connecting rod 167 includes a first rod 169, a second rod 171 and a third rod 173 connected in sequence.

[0114] See also Figure 5The first rod 169 is parallel to the conveying platform 109, or the first rod 169 intersects the conveying platform 109. Further, the first rod 169 is parallel to the conveying platform 109. One end of the first rod 169 is fixedly connected to the end of the support base 135 away from the transmission wheel 127.

[0115] See also Figure 5 The second rod 171 is perpendicular to or intersects the conveying platform 109. Furthermore, the second rod 171 is perpendicular to the conveying platform 109. The second rod 171 is arranged along the Z-axis direction and is located on one side of the second transmission assembly 147. The second rod 171 is located on the side of the driving shaft 157 away from the fixed bracket 136.

[0116] See also Figure 5 The third rod 173 is parallel to the conveying platform 109, or the third rod 173 intersects the conveying platform 109. Furthermore, the third rod 173 is arranged parallel to the conveying platform 109. The third rod 173 is located on the side of the first rod 169 facing away from the conveying platform 109, and the third rod 173 is arranged opposite the first rod 169. The second rod 171 is connected between the first rod 169 and the third rod 173. The third rod 173 is fixedly connected to the rotating shaft of the third spur gear 163.

[0117] Please also refer to Figure 4 and Figure 5 When the moving block 177 moves forward or backward along the Y-axis under the action of the second drive assembly 189, the moving block 177 drives the rack 165 to move along the Y-axis. The rack 165 drives the third spur gear 163 to rotate about the Z-axis. The third spur gear 163 drives the connecting rod 167 to rotate about the Z-axis. The connecting rod 167 drives the support base 135, the transmission wheel 127 provided on the support base 135, the first spur gear 139 connected to the transmission wheel 127, the second spur gear 141, and the first bevel gear 143 to rotate as a whole about the Z-axis. During this rotation, the first bevel gear 143 rotates along the circumference of the second bevel gear 149.

[0118] The above embodiment is an example of the structure of a set of adjustment mechanisms 125. Figure 2 and Figure 3The whole plate mechanism 100 includes multiple groups of adjustment mechanisms 125. The multiple groups of adjustment mechanisms 125 are arranged in multiple rows and columns. The driving shafts 157 of each adjustment mechanism 125 in each row are connected in a collinear manner to form a rotating shaft 179 extending along the row direction. In other words, the driving shafts 157 of the multiple adjustment mechanisms 125 are the same, and the driving shaft 157 is defined as the rotating shaft 179. The extension direction of the rotating shaft 179 is the Y-axis direction. The multiple rotating shafts 179 can be arranged in parallel and at intervals along the X-axis direction. Multiple rows of adjustment mechanisms 125 are provided on the multiple rotating shafts 179. One side of the rotating shaft 179 is fixedly mounted on the first support platform 105, and the other side of the rotating shaft 179 is fixedly mounted on the second support platform 107. A fifth bevel gear 183 is provided at the end of the rotating shaft 179 away from the first support platform 105. The whole plate mechanism 100 also includes a power shaft 181. The extension direction of the power shaft 181 is perpendicular to the extension direction of the rotating shaft 179. The power shaft 181 is disposed on the second support platform 107 and is arranged along the X-axis. A plurality of sixth bevel gears 185 are disposed at intervals on the power shaft 181. Each of the sixth bevel gears 185 is meshed with one of the fifth bevel gears 183.

[0119] Please also refer to Figure 2 and Figure 3 The rotating shaft of the first driving assembly 187 is connected to the power shaft 181 to drive the power shaft 181 to rotate. During the process of the power shaft 181 rotating around the X-axis, the sixth bevel gear 185 provided on the power shaft 181 rotates along with the power shaft 181 around the X-axis. Driven by the sixth bevel gear 185, the multiple fifth bevel gears 183 rotate around the Y-axis, and the multiple rows of rotating shafts 179 rotate around the Y-axis under the drive of the fifth bevel gear 183. For each adjustment mechanism 125, the fourth bevel gear 159 rotates around the Y-axis under the action of the rotating shaft 179. During the process of the fourth bevel gear 159 rotating around the Y-axis, it drives the third bevel gear 151 and the second bevel gear 149 to rotate around the Z-axis. The second bevel gear 149 drives the first bevel gear 143 to rotate. The first bevel gear 143 drives the first spur gear 139 and the second spur gear 141 to rotate, thereby driving the transmission wheel 127 to rotate.

[0120] Because each sixth bevel gear 185 has the same structure and size, and each fifth bevel gear 183 has the same structure and size, the first drive assembly 187 can drive the rotating shafts 179 of each row to rotate synchronously. Because each adjustment mechanism 125 has the same structure, the transmission wheels 127 of each adjustment mechanism 125 can also rotate synchronously. In other words, the panel assembly 100 provided in this embodiment of the application can drive the transmission wheels 127 of multiple adjustment mechanisms 125 to rotate synchronously using a single first drive assembly 187.

[0121] See also Figure 3The racks 165 of each row of adjustment mechanisms 125 are mounted on the same movable block 177. The second drive assembly 189 connects to the movable block 177 and drives the movable block 177 in the forward or reverse direction along the Y-axis, thereby driving the racks 165 of the adjustment mechanisms 125 in a row to move synchronously along the Y-axis, thereby causing the transmission wheels 127 in that row to deflect by the same angle. This allows the transmission wheels 127 in a certain area to be deflected, thereby changing the transport direction of the circuit boards 2000 and causing them to move toward the reference edge 117. By controlling the distance that the second drive assembly 189 drives the movable block 177 to move, the angle of deflection of the transmission wheels 127 can be controlled, thereby allowing the transport direction of the circuit boards 2000 to be adjusted.

[0122] In the embodiment of the present application, for the adjustment mechanism 125, the driving shaft 157 transmits the power of the first drive component 187 to the fourth bevel gear 159, and transmits it to the second bevel gear 149 through the meshing third bevel gear 151. The second bevel gear 149 transmits the power to the first bevel gear 143, and then transmits it to the first spur gear 139 through the second spur gear 141, and finally transmits it to the transmission wheel 127, so that the transmission wheel 127 can roll; the second drive component 189 changes the position of the third spur gear 163 through the rack 165, and correspondingly changes the position of the transmission wheel 127 support seat 135 by changing the position of the connecting rod 167, and finally achieves the purpose of changing the direction of the transmission wheel 127.

[0123] The adjustment mechanism assembly 123 consists of several adjustment mechanisms 125 mounted on the same driving shaft 157. Specifically, the adjustment mechanisms 125 are mounted on a rotating shaft 179, which is mounted on two bearing blocks of a fixed bracket 136. The two bearing blocks of the fixed bracket 136 are connected via a connecting plate. All transmission wheels 127 in the adjustment mechanism assembly 123 have the same transmission speed and angle, ensuring smooth transmission. The second drive assembly 189 coordinates the movement of the rack 165 and the third spur gear 163 to adjust the transmission direction of the entire adjustment mechanism assembly 123.

[0124] Regarding the adjustment mechanism assembly 121, several sets of adjustment mechanism assemblies 123 are combined, with a power shaft 181 driving all of the adjustment mechanism assemblies 123. The angle of each row of adjustment mechanism assemblies 123 can be controlled as a whole, while simultaneously capturing the reference edge 117 as the initial X-axis position of the board after assembly. Several sets of adjustment mechanism assemblies 123 are mounted on the machine 101. A first drive assembly 187 drives the power shaft 181 to provide power, which is then transmitted to each adjustment mechanism assemblies 123 via several sets of fifth bevel gears 183 and sixth bevel gears 185, achieving synchronous forward movement of all transmission wheels 127. Simultaneously, the angle of the transmission wheels 127 is adjusted by the second drive assembly 189 in coordination with each adjustment mechanism assemblies 123, causing the circuit board 2000 to gradually move closer to the reference edge 117. When the edge of the circuit board 2000 corresponding to the position of the adjustment mechanism group 123 reaches the reference edge 117, the sensor 119 corresponding to the group is triggered to send a signal, controlling the second drive component 189 corresponding to the adjustment mechanism group 123 to change the angle of the transmission wheel 127 to be parallel to the reference edge 117. Each adjustment mechanism group 123 controls the angle separately, and finally makes the edge of the entire circuit board 2000 flush with the reference edge 117, and finally realizes that the circuit board 2000 is parallel to the reference edge 117 in the X-axis direction and is transmitted to the work station corresponding to the detection mechanism.

[0125] The embodiment of the present application combines multiple sets of gears and racks 165 into an independent adjustment mechanism 125, which can realize the self-rotation transmission of the transmission wheel 127, and can also realize the horizontal angle adjustment of the transmission wheel 127, thereby realizing the synchronous transmission of the circuit board 2000 in the X-axis and Y-axis directions, and can be compatible with various problems such as angle and size changes of incoming circuit boards 2000, thereby effectively improving the whole board efficiency; and the whole board mechanism 100 provided in the embodiment of the present application has a simple structure, and each adjustment mechanism group 123 only needs one driving force in the Y-axis direction to change the horizontal angle, and only one driving force in the X-axis direction is needed to realize the self-rotation of all transmission wheels for whole board and transmission.

[0126] The embodiment of the present application adopts a gear-gear combination and a gear-rack combination to form an adjustment mechanism 125, which realizes the rotation and angle adjustment of the transmission wheel. Other principles and basic structures that are the same or similar to those of the present application are within the scope of protection of the present application.

[0127] In the second aspect, the specific structure of the connecting wheel mechanism 300 is illustrated below with reference to the accompanying drawings. Of course, the connecting wheel mechanism 300 provided by this application includes but is not limited to the following embodiments. Conventional replacements made by those skilled in the art based on the following embodiments fall within the scope of protection of this application.

[0128] See also Figure 1 and Figure 8The optical inspection device 1000 further includes a connecting wheel mechanism 300 connected between the pressing wheel mechanism 400 and the whole plate mechanism 100. The connecting wheel mechanism 300 includes a workbench 305, and the connecting wheel mechanism 300 is disposed on the workbench 305.

[0129] Please also refer to Figure 1 and Figure 8 The connecting wheel mechanism 300 includes a plurality of rollers 301. The plurality of rollers 301 all extend along the Y-axis direction, and the plurality of rollers 301 are arranged in parallel along the X-axis direction. The conveying surface 113 formed by the plurality of rollers 301 is coplanar with the conveying surface 113 on the conveying platform 109, so that the circuit board 2000 conveyed by the screed mechanism 100 can be conveyed to the connecting wheel mechanism 300. The circuit board 2000 can continue to be conveyed forward under the action of the transmission wheel 127, and the rolling of the connecting wheel mechanism 300 reduces the resistance to the forward conveyance of the circuit board 2000. The pressing wheel mechanism 400 is connected to the discharge end of the connecting wheel mechanism 300. The transmission wheel 127 can convey the circuit board 2000 to the pressing wheel mechanism 400 so that the conveying mechanism 600 can clamp the circuit board 2000.

[0130] Thirdly, the specific structure of the pinch roller mechanism 400 is illustrated below with reference to the accompanying drawings. Of course, the pinch roller mechanism 400 provided by this application includes but is not limited to the following embodiments. Conventional replacements made by those skilled in the art based on the following embodiments fall within the scope of protection of this application.

[0131] Traditional technologies use a combination of powered rollers or powered belts as the pressure roller mechanism. These two pressure roller mechanisms have at least the following disadvantages: 1. Performance: The speed of the powered roller or the powered belt is not equal to the transmission speed, which causes the circuit board to slip, stall, etc. when passing through the acquisition area, thereby affecting the accuracy of the acquired image and the detection results. 2. Roller processing and cost: For roller-type transmission, according to the detection camera parameters and detection accuracy requirements, it is calculated that the equipment has a very high full runout tolerance requirement for roller processing. The industry standard specification size for circuit boards is 28 inches wide. It is very difficult to achieve this processing accuracy and runout with a roller of this length, and the cost is very high (for example, roller size: diameter 45mm, length 950mm, full runout tolerance within 0.01mm). 3. Service life: After prolonged use, the roller's full runout tolerance increases due to load and inherent stress deformation, leading to wear and tear and requiring replacement, resulting in a short service life. Belts made of polyurethane or other materials wear and tear over long periods of time, requiring frequent replacement and shortening their service life. 4. Efficiency and debugging: The clearance and parallelism between the power roller or belt and the circuit board are difficult to adjust. Due to the unevenness of the circuit board itself, the clearance between the roller or belt and the circuit board requires frequent adjustment, resulting in low production efficiency.

[0132] The embodiment of the present application provides a pressure wheel mechanism 400 that ensures the flatness of the circuit board 2000, thereby solving the problem of unstable performance caused by problems such as camera blur caused by the unevenness of the circuit board 2000 in the collection area, and has low cost, short service life and stable performance.

[0133] See also Figure 9 The pressing wheel mechanism 400 is used to flatten the circuit board 2000 .

[0134] See also Figure 9 The pressing wheel mechanism 400 includes a pressing wheel assembly 409 and a supporting wheel assembly 423 .

[0135] Please also refer to Figure 1 and Figure 8 The pressure wheel assembly 409 and the support wheel assembly 423 are located on the same side of the conveying mechanism 600. Specifically, the pressure wheel assembly 409 and the support wheel assembly 423 are arranged along the Z-axis. The pressure wheel assembly 409 and the support wheel assembly 423 are arranged opposite each other and spaced apart. The first gap formed between the pressure wheel assembly 409 and the support wheel assembly 423 is used to convey the board (such as the circuit board 2000).

[0136] The pressure roller assembly 409 and the support roller assembly 423 are respectively used to press against opposite sides of the circuit board 2000. The pressure roller assembly 409 includes a first pressure roller group 411 and a second pressure roller group 417. The second pressure roller group 417 is closer to the conveying mechanism 600 than the first pressure roller group 411. The support roller assembly 423 includes a first support roller group 425 and a second support roller group 429. The first pressure roller group 411 and the first support roller group 425 are arranged opposite each other. In the conveying direction (X-axis direction) of the circuit board 2000, the first pressure roller group 411 is located between the first support roller group 425 and the second support roller group 429.

[0137] By setting a first pressing wheel group 411 and a second pressing wheel group 417 on the upper side of the circuit board 2000, and a first supporting wheel group 425 and a second supporting wheel group 429 on the lower side of the circuit board 2000, the circuit board 2000 is pressed from the upper and lower sides to make the circuit board 2000 flat relative to the horizontal plane.

[0138] Further, see Figure 9The first pressing wheel assembly 411 includes a plurality of first pressing wheels 415 arranged along the Y-axis. Each first pressing wheel 415 is further connected to a first elastic buffer 413, which allows the first pressing wheel 415 to have space to move in the Z-axis. Similarly, the second pressing wheel assembly 417 includes a plurality of second pressing wheels 421 arranged along the Y-axis. Each second pressing wheel 421 is further connected to a second elastic buffer 419, which allows the second pressing wheel 421 to have space to move in the Z-axis.

[0139] Specifically, the first elastic buffer 413 includes but is not limited to a spring, an elastic plastic column, an elastic rubber column, an elastic metal sheet, an elastic plastic sheet, etc., and elasticity can also be achieved by the principle that like poles of magnets repel each other. The number of the first elastic buffer 413 can be one, two, or any other number, and the first elastic buffer 413 is used to adjust the height of the pressure wheel in the Z-axis direction. Correspondingly, the second elastic buffer 419 includes but is not limited to a spring, an elastic plastic column, an elastic rubber column, an elastic metal sheet, an elastic plastic sheet, etc., and elasticity can also be achieved by the principle that like poles of magnets repel each other. The first elastic buffer 413 and the second elastic buffer 419 are used to enable the first pressure wheel group 411 and the second pressure wheel group 417 to be pressed onto circuit boards 2000 of different thicknesses.

[0140] See also Figure 9 The first support wheel group 425 includes a plurality of first support wheels 427 arranged along the Y-axis direction. Optionally, each first support wheel 427 is further connected to a first elastic buffer 413, which enables the first support wheel 427 to have a movable space in the Z-axis direction.

[0141] See also Figure 9 The second support wheel group 429 includes a plurality of second support wheels 431 arranged along the Y-axis direction. Optionally, each second support wheel 431 is further connected to a second elastic buffer 419, which enables the second support wheel 431 to have a movable space in the Z-axis direction.

[0142] By providing elastic buffers at each pressing wheel, each pressing wheel can be elastically extended and retracted in the Z-axis direction, thereby enabling the pressing wheel mechanism 400 to press circuit boards 2000 of different thicknesses. By staggering the second pressing wheel group 417 and the second supporting wheel group 429, circuit boards 2000 of different thicknesses can be first transferred to the second supporting wheel group 429 and then to the second pressing wheel group 417. The second pressing wheel 421 can be adjusted in height in the Z-axis direction to accommodate the thickness of the circuit board 2000. After adjustment, the circuit board 2000 enters between the first pressing wheel group 411 and the first supporting wheel group 425. Since the second pressing wheel group 417 and the second supporting wheel group 429 can position the circuit board 2000, the circuit board 2000 can directly enter between the first pressing wheel group 411 and the first supporting wheel group 425. While entering, the first pressing wheel 415 of the first pressing wheel group 411 can adjust its height in the Z-axis direction to stably press the circuit board 2000.

[0143] Fourthly, the specific structure of the detection mechanism 800 is illustrated below with reference to the accompanying drawings. Of course, the detection mechanism 800 provided by this application includes but is not limited to the following embodiments. Conventional replacements made by those skilled in the art based on the following embodiments fall within the scope of protection of this application.

[0144] See also Figure 1 , the inspection mechanism 800 is provided on the machine 305. The inspection mechanism 800 is used to inspect the quality of the circuit board 2000 during the transmission process of the circuit board 2000. This application provides examples of the structure of the inspection mechanism 800. Of course, this application includes but is not limited to the inspection mechanism 800 provided in the following embodiments.

[0145] See also Figure 1 and Figure 10 The inspection mechanism 800 includes a first inspection mechanism 801 and a second inspection mechanism 831. The second inspection mechanism 831 can be arranged on opposite sides of the collection area in a mirror image of the first inspection mechanism 801. The first inspection mechanism 801 and the second inspection mechanism 831 can simultaneously inspect the upper and lower sides of the circuit board 2000 to simultaneously detect defects on the board surface of both sides of the circuit board 2000, thereby improving inspection efficiency. Of course, the first inspection mechanism 801 and the second inspection mechanism 831 can also be inspected separately. In other embodiments, the first inspection mechanism 801 and the second inspection mechanism 831 can also be located on the side of the collection area away from the ground or on the side of the collection area close to the ground, so that the first inspection mechanism 801 and the second inspection mechanism 831 can inspect one board surface of the circuit board 2000 from different angles, thereby improving inspection accuracy.

[0146] See also Figure 1 、 Figure 10 and Figure 11, the first detection mechanism 801 is located on the side of the pressure wheel assembly 409 facing away from the circuit board 2000. The second detection mechanism 831 is located on the side of the support wheel assembly 423 facing away from the circuit board 2000. In other words, along the Z-axis direction, the first detection mechanism 801, the pressure wheel assembly 409, the support wheel assembly 423, and the second detection mechanism 831 are arranged in sequence. In this way, the detection mechanism 800 and the pressure wheel mechanism 400 are stacked along the Z-axis direction, which can effectively save space in the X-axis direction of the optical inspection device 1000. At the same time, the pressure wheel mechanism 400 presses and flattens the circuit board 2000, facilitating the inspection process of the detection mechanism 800. The area between the first detection mechanism 801 and the second detection mechanism 831 is the collection area or inspection area.

[0147] While conveyor mechanism 600 grips circuit board 2000 and conveys it in the X-direction at a constant speed, first inspection mechanism 801 can detect defects on the first side of circuit board 2000 by capturing images. Second inspection mechanism 831 can also detect defects on the second side of circuit board 2000 by capturing images. This ensures that the image capture speed of inspection mechanism 800 matches the conveyance speed of circuit board 2000, ensuring the clarity of the captured images and, consequently, the authenticity of the detected defects.

[0148] Referring to Figure 11 , the first inspection mechanism 801 further includes an inspection mounting base 803, an inspection adjustment shaft 805, at least one camera assembly, a coaxial light source 827, and at least one side light source 829. The multiple camera assemblies can be arranged along the Y-axis. The multiple camera assemblies can be secured to the inspection mounting base 803 via the inspection adjustment shaft 805, and the inspection adjustment shaft 805 can adjust the height of the multiple camera assemblies relative to the inspection mounting base 803, either collectively or individually.

[0149] Please refer to 12, the camera assembly includes a camera mounting base 807, a camera angle adjustment base 811, a camera X-axis adjustment base 817 and a camera 835 which are sequentially connected along the Z axis. The camera 835 includes a lens base 833 and a lens 825. The detection mounting base 803 is provided on the machine 305 (see Figure 13 The camera mounting seat 807 is provided on the detection adjustment shaft 805. The detection adjustment shaft 805 is used to drive the camera mounting seat 807 to move along the Z-axis positive direction or direction.

[0150] See also Figure 13The camera mount 807 and the camera angle adjustment mount 811 form an angle adjustment device. The camera angle adjustment mount 811 is provided with a plurality of angle adjustment guide slots 815. The plurality of angle adjustment guide slots 815 can all be arcuate slots. The rotation centers of the plurality of angle adjustment guide slots 815 coincide with the center of the camera 835 (i.e., the rotation centers of the plurality of angle adjustment guide slots 815 are located on the central axis of the lens 825). The camera mount 807 is provided with a plurality of angle adjustment guide bosses 813. Each angle adjustment guide boss 813 is disposed within an angle adjustment guide slot 815 and is slidable within the angle adjustment guide slot 815. The rotation centers of the plurality of angle adjustment guide bosses 813 coincide with the center of the camera 835 (i.e., the rotation centers of the plurality of angle adjustment guide bosses 813 are located on the central axis of the lens 825). The camera angle adjustment mount 811 can rotate relative to the camera mount 807 to rotate the camera 835 to a desired angle on a horizontal plane. The camera mount 807 is also provided with an angle adjustment fixing position 809. After the angle of the camera angle adjustment seat 811 is adjusted to a suitable position, the camera angle adjustment device is fixed at the angle adjustment fixing position 809 by screws.

[0151] See also Figure 14 The camera angle adjustment base 811 is mounted on the camera X-axis adjustment base 817. The camera angle adjustment base 811 and the camera X-axis adjustment base 817 form the camera X-direction adjustment device. The camera angle adjustment base 811 is provided with an X-axis direction adjustment guide boss 819, and the camera X-axis adjustment base 817 is provided with an X-axis direction adjustment guide groove 821. The X-axis direction adjustment guide boss 819 can slide along the X-axis direction adjustment guide groove 821 to allow the camera 835 to slide along the X-axis. The camera X-axis adjustment base 817 is provided with an X-axis direction adjustment fixing position 823. When the camera 835 is adjusted to the appropriate position in the X-direction, the X-direction angle adjustment device is fixed to the X-axis direction adjustment fixing position 823 of the camera X-axis adjustment base 817 using screws.

[0152] The above can realize the position adjustment of the camera 835 along the X-axis direction and the angle adjustment around the Z-axis direction.

[0153] Furthermore, optical inspection apparatus 1000 also includes a thickness sensor (not shown), which may be mounted on inspection mount 803. The thickness sensor can emit a detection signal along the Z-axis toward the surface of circuit board 2000. This detection signal includes, but is not limited to, infrared light signals, laser signals, and the like. The thickness sensor detects the thickness of circuit board 2000 by measuring the distance between the sensor and the surface of circuit board 2000, allowing detection adjustment shaft 805 to adjust the distance between camera 835 and circuit board 2000 based on the thickness of circuit board 2000. Camera adjustment device 809 is used to adjust the axial direction of lens 825. Coaxial light source 827 and side light source 829 are both mounted on inspection mount 803. Coaxial light source 827 emits light along the axial direction of lens 825. Side light source 829 is positioned between lens 825 and circuit board 2000 and emits light along the Y-axis. The coaxial light source 827 and the side light source 829 are combined into a light source system, which is used to provide fill light when the camera 835 captures an image. The coaxial light source 827 and the side light source 829 are also provided on the detection adjustment shaft 805, and can also move along the Z axis along with the camera mounting base 807 and the lens 825 to adjust the working height of the camera 835 according to the circuit boards 2000 of different thicknesses. In particular, the camera adjustment device 809 is provided with an adjustment device in the X direction and the angular direction (the angular direction is the direction around the Z axis). In other words, the camera 835 can be adjusted in the X direction, the Z direction and the angular direction to adjust all cameras 835 to the same specific resolution and clarity, so that the working state of all cameras 835 is consistent.

[0154] By designing a first inspection mechanism 801 and a second inspection mechanism 831, simultaneous inspection of the upper and lower surfaces of the circuit board 2000 is achieved, thereby improving inspection efficiency. The first inspection mechanism 801 and the second inspection mechanism 831 are both composed of several identical line scan cameras, line scan lenses, and light source systems. The first inspection mechanism 801 is mounted on an inspection mounting base 803 and can automatically adjust the acquisition height for circuit boards 2000 of different thicknesses. The second inspection mechanism 831 is fixed to the workbench 305, and the second inspection mechanism 831 is at least partially located within the workbench 305. The acquisition height of the second inspection mechanism 831 is fixed. Each camera is designed on a camera adjustment device 809, which is designed with adjustment devices in the X direction, Z direction, and angular direction. The camera adjustment device 809 can adjust all cameras to the same working state, with consistent resolution and clarity.

[0155] The conveyor mechanism 600 clamps the circuit board 2000 and conveys it at a constant speed or at a speed that accurately matches the actual speed and the required theoretical speed. During forward X-axis conveyance, the first inspection mechanism 801 detects defects on the first side of the circuit board 2000 by capturing images. The second inspection mechanism 817 also detects defects on the second side of the circuit board 2000 by capturing images. This ensures that the image capture speed of the inspection mechanism 800 matches the conveyance speed of the circuit board 2000, ensuring the clarity of the captured images and, consequently, the authenticity of the detected defects.

[0156] In the fifth aspect, the specific structure of the transmission mechanism 600 is illustrated below with reference to the accompanying drawings. Of course, the transmission mechanism 600 provided by this application includes but is not limited to the following embodiments. Conventional replacements made by those skilled in the art based on the following embodiments fall within the scope of protection of this application.

[0157] See also Figure 15 The conveying mechanism 600 is provided at the rear section of the pressing wheel mechanism 400 to clamp the circuit board 2000 after being flattened by the pressing wheel mechanism 400. The first conveying assembly 611 and the second conveying assembly 633 of the conveying mechanism 600 are used to alternately convey the circuit board 2000 to the unloading conveying mechanism 900.

[0158] See also Figure 16 The conveying mechanism 600 includes a frame 601, a first conveying assembly 611, a second conveying assembly 633 and a controller (not shown).

[0159] See also Figure 16 The frame 601 includes a first side plate 603 and a second side plate 605 that are arranged opposite to each other. The first side plate 603 and the second side plate 605 can be arranged in parallel or non-parallel.

[0160] See also Figure 16 and Figure 17 The frame 601 is provided with a pair of first guide rails 607. The pair of first guide rails 607 can extend along the X-axis direction or approximately along the X-axis direction. The pair of first guide rails 607 are respectively provided on the first side plate 603 and the second side plate 605. The frame 601 is also provided with a pair of second guide rails 609. The pair of second guide rails 609 can extend along the X-axis direction or approximately along the X-axis direction. The pair of first guide rails 607 and the pair of second guide rails 609 can be arranged in opposite directions along the Z-axis. The pair of first guide rails 607 and the pair of second guide rails 609 can also be arranged in a forward direction along the Z-axis. The pair of second guide rails 609 are respectively provided on the first side plate 603 and the second side plate 605.

[0161] See also Figure 16 and Figure 17, the first conveying assembly 611 is arranged on the frame 601. The first conveying assembly 611 can extend roughly along the Y-axis direction. The first conveying assembly 611 is used to clamp and transport the circuit board 2000. The opposite ends of the first conveying assembly 611 are respectively slidably connected to a pair of first guide rails 607. The first conveying assembly 611 can slide along the frame 601 under the drive of an external force to transfer the circuit board 2000 from the front section of the conveying mechanism 600 to other structures (such as a blanking conveying mechanism, which will be described in detail later). Specifically, the first conveying assembly 611 can be driven by a precision high-speed transmission mechanism such as a motor, a ball screw, a linear motor, etc. to slide and connect a pair of first guide rails 607.

[0162] See also Figure 18 and Figure 19 The first conveying assembly 611 includes a first clamp seat 613 and at least one first clamp 615 disposed on the first clamp seat 613. The first clamp seat 613 is disposed along the Y-axis. Opposite ends of the first clamp seat 613 are slidably connected to the frame 601. The first clamp 615 is used to clamp the board (i.e., the circuit board 2000).

[0163] See also Figure 16 and Figure 17 , the second conveying assembly 633 is arranged on the frame 601. The second conveying assembly 633 can extend roughly along the Y-axis direction. The second conveying assembly 633 is used to clamp and transport the circuit board 2000. The opposite ends of the second conveying assembly 633 are respectively slidably connected to a pair of second guide rails 609. The second conveying assembly 633 can slide along the frame 601 under the drive of an external force to transfer the circuit board 2000 from the front section of the conveying mechanism 600 to other structures (such as a blanking conveying mechanism). Specifically, the second conveying assembly 633 can be driven by a precision high-speed transmission mechanism such as a motor, a ball screw, or a linear motor to slidably connect a pair of second guide rails 609. The second conveying assembly 633 is staggered with the first conveying assembly 611 in the Z-axis direction. Among them, the sliding direction of the first conveying assembly 611 and the sliding direction of the second conveying assembly 633 are both the X-axis direction (including the positive direction of the X-axis or the reverse direction of the X-axis).

[0164] See also Figure 20 and Figure 21The second conveying assembly 633 includes a second clamp seat 635 and at least one second clamp 637 provided on the second clamp seat 635. The second clamp seat 635 is arranged along the Y-axis direction. The opposite ends of the second clamp seat 635 are slidably connected to the frame 601. The sliding track of the second clamp seat 637 (along the X-axis direction) and the sliding track of the first clamp seat 613 (along the X-axis direction) are spaced apart along the Z-axis direction. The second clamp 637 is used to clamp the plate (i.e., the circuit board 2000). The second clamp 637 is provided on a side of the second clamp seat 635 close to the first clamp seat 613, and the first clamp 615 is provided on a side of the first clamp seat 613 close to the second clamp seat 635.

[0165] By setting the first conveying component 611 to slide along a pair of first guide rails 607 through the first clamp seat 613, and by setting the second conveying component 633 to slide along a pair of second guide rails 609 through the second clamp seat 635, wherein the first guide rails 607 and the second guide rails 609 are spaced apart in the Z-axis direction; by setting the first clamp 615 to be located on the side of the first clamp seat 613 close to the second conveying component 633, and setting the second clamp 637 to be located on the side of the second clamp seat 635 close to the first conveying component 611 side, so that the first clamp 615 and the second clamp 637 are located at a similar height. In the process of the first clamp 615 and the second clamp 637 clamping the circuit board 2000, the distance that the first clamp 615 and the second clamp 637 move in the Z-axis direction can be reduced, so that the first clamp 615 and the second clamp 637 can clamp the board (i.e., the circuit board 2000), saving the clamping time of the first conveying component 611 and the second conveying component 633, increasing the clamping speed, and thus improving the conveying efficiency of the conveying mechanism 600.

[0166] Optionally, the first conveying assembly 611 and the second conveying assembly 633 may be driven by a belt-motor combination to slidably connect the first side plate 603 and the second side plate 605 .

[0167] Optionally, a controller is connected to the motor driving the first conveyor assembly 611 and the motor driving the second conveyor assembly 633. The controller is used to control the alternating conveyance of the circuit board 2000 by the first conveyor assembly 611 and the second conveyor assembly 633. The controller can be an integrated circuit chip, disposed on a circuit board fixed to the machine 601 or elsewhere in the optical inspection equipment. This application does not specifically limit the specific structure and location of the controller.

[0168] In this embodiment, please refer to Figure 17 The transmission mechanism 600 further includes a first motor 641 (in Figure 17 The first side panel 603 blocks the Figure 23), at least one first transmission belt 643, at least two first transmission pulleys 642, and a first transmission shaft 645. This embodiment uses only two first transmission belts 643 and four first transmission pulleys 642 as an example. This application is not limited to two first transmission belts 643 or four first transmission pulleys 642. Specifically, the first transmission pulleys 642 are synchronous pulleys. The first transmission pulleys 642 can be belt pulleys or steel pulleys. Specifically, the first transmission belt 643 is a synchronous belt. The first transmission belt 643 can be a belt or a steel belt.

[0169] The first motor 641 is located on the side of the first side plate 603 facing away from the second side plate 605 to reduce interference with the progress of the first conveying assembly 611 and the second conveying assembly 633. Of course, in other embodiments, the first motor 641 can also be located on the side of the second side plate 605 facing away from the first side plate 603. Of course, the first motor 641 can also be replaced by other power components capable of driving the first transmission shaft 645 to rotate.

[0170] See also Figure 17 The first transmission shaft 645 is arranged along the Y-axis direction. The majority of the first transmission shaft 645 is disposed between the first side plate 603 and the second side plate 605. One end of the first transmission shaft 645 passes through the first side plate 603 and is directly or indirectly connected to the rotating shaft of the first motor 641. The other end of the first transmission shaft 645 is rotatably connected to the second side plate 605. In this way, driven by the first motor 641, the first transmission shaft 645 can rotate.

[0171] See also Figure 17 The first transmission shaft 645 can be disposed near the feed end of the conveyor mechanism 600 or near the discharge end of the conveyor mechanism 600. In this embodiment, the first transmission shaft 645 is disposed near the discharge end of the conveyor mechanism 600 to reduce interference with the conveyor mechanism 600 gripping the board (i.e., the circuit board 2000) at the feed end.

[0172] See also Figure 17 The first first transmission wheel 642 is located at the end of the first transmission shaft 645 connected to the first side plate 603, and the second first transmission wheel 642 is located near the feed end of the first side plate 603. The axes of the first and second first transmission wheels 642 and 642 are both along the Y-axis direction, and both the first and second first transmission wheels 642 and 642 are rotatable relative to the first side plate 603.

[0173] See also Figure 17The two ends of the first first transmission belt 643 are installed on the first first transmission wheel 642 and the second first transmission wheel 642. When the first motor 641 drives the first transmission shaft 645 to rotate, the first transmission shaft 645 drives the first first transmission wheel 642 to rotate. The rotation of the first first transmission wheel 642 drives the first first transmission belt 643 to transmit the power. During the transmission process, the first first transmission belt 643 also drives the second first transmission wheel 642 to rotate.

[0174] In this way, the rotating shaft of the first motor 641 , the first transmission shaft 645 , the two first transmission wheels 642 and the first transmission belt 643 rotate synchronously.

[0175] In one embodiment, the first transmission wheel 642 and the first transmission belt 643 may be disposed on both sides of the first side plate 603 and the second side plate 605. In other words, the first motor 641 transmits power to the first transmission assembly 611 at both ends thereof.

[0176] Specifically, in addition to the first first transmission wheel 642, the second first transmission wheel 642, and the first first transmission belt 643 being provided on the side of the first side plate 603, the second first transmission wheel 642, the third first transmission wheel 642, and the fourth first transmission wheel 642 are also provided on the side of the second side plate 605. Although the second first transmission wheel 642, the third first transmission wheel 642, and the fourth first transmission wheel 642 are obscured by the second side plate 605, the arrangement of the second first transmission wheel 642, the third first transmission wheel 642, and the fourth first transmission wheel 642 can refer to the arrangement of the first first transmission wheel 642, the first first transmission wheel 642, and the second first transmission wheel 642.

[0177] Specifically, the third first transmission wheel 642 is located at the end of the first transmission shaft 645 connected to the first side plate 603, and the fourth first transmission wheel 642 is located near the feed end of the first side plate 603. The third and fourth first transmission wheels 642 and 642 are both axially aligned along the Y-axis and are rotatable relative to the first side plate 603.

[0178] Specifically, both ends of the second first transmission belt 643 are mounted on the third and fourth first transmission wheels 642. When the first motor 641 drives the first transmission shaft 645 to rotate, the first transmission shaft 645 drives the third first transmission wheel 642 to rotate. The rotation of the third first transmission wheel 642 drives the second first transmission belt 643 to transmit power. During the transmission process, the second first transmission belt 643 also drives the fourth first transmission wheel 642 to rotate.

[0179] In this way, the rotating shaft of the first motor 641 , the first transmission shaft 645 , the four first transmission wheels 642 and the two first transmission belts 643 rotate synchronously.

[0180] The first motor 641 drives the first transmission belt 643 to move in a clockwise or counterclockwise direction. The first conveyor assembly 611 is connected to the first transmission belt 643, so that it can move forward along the X-axis or backward along the X-axis under the drive of the first motor 641. The opposite ends of the first conveyor assembly 611 are respectively connected to the two first transmission belts 643, so that the first motor 641 can achieve high-precision control of the speed of the first conveyor assembly 611 through the first transmission shaft 645, the first transmission wheel 642, and the first transmission belt 643.

[0181] In particular, in application scenarios that require extremely precise transmission speeds, for example, in optical inspection equipment for circuit board 2000, if the speed of the circuit board 2000 during inspection does not match the speed detected by the optical inspection equipment, it may cause the image captured by the optical inspection equipment to be blurred, thereby causing problems such as detection failure and inaccuracy.

[0182] Based on the above application scenarios, the first motor 641, first transmission shaft 645, first transmission wheel 642, and first transmission belt 643 can be used to control the first conveyor assembly 611 to convey at a constant speed or an actual speed that matches the required theoretical speed with high accuracy. When the first conveyor assembly 611 conveys at a constant speed or an actual speed that matches the required theoretical speed with high accuracy, the circuit board 2000 is also conveyed at a constant speed or an actual speed that matches the required theoretical speed with high accuracy. This ensures that the speed of the circuit board 2000 during inspection matches the speed detected by the optical inspection equipment, ensuring clear images captured by the optical inspection equipment and accurate inspection results.

[0183] In another embodiment, compared to the previous embodiment, the first transmission shaft 645 may be omitted. Instead, a first transmission wheel 642 and a first transmission belt 643 may be provided only on the side of the first side plate 603 or the second side plate 605 to provide a driving force for movement at one end of the first conveyor assembly 611. The first conveyor assembly 611 is driven by the sliding of the clamp seat of the first conveyor assembly 611 along the first side plate 603 and the second side plate 605. In other words, the first motor 641 provides the driving force for the movement of the first conveyor assembly 611 at one end. This embodiment has the advantages of simple structure and low cost.

[0184] By installing the first transmission wheel 642 and the first transmission belt 643 on both sides of the first side plate 603 and the second side plate 605, compared to installing the first transmission wheel 642 and the first transmission belt 643 on one side, the loss of transmission efficiency can be minimized, effectively avoiding the problem of power lag caused by relying solely on the fixture base for transmission due to the large span between the left and right sides. Especially during the optical inspection process, at the moment of inspection start, the position of the board head must be synchronized. If there is a transmission lag, the two or more fixtures will become out of sync, which will cause abnormalities in the inspection image.

[0185] See also Figure 17 The transmission mechanism 600 further includes a second motor 646 (in Figure 17 is blocked by the first side plate 603, see Figure 23 ), at least one second transmission belt 647 and at least two second transmission wheels 648, which are used to drive the second transmission component 633 to move. The transmission mechanism 600 can also include a second transmission shaft 649. The position of the second transmission shaft 649 can be close. Specifically, the second transmission shaft 649 and the first transmission shaft 645 are arranged in the positive direction of the Z axis. The position of the second motor 646 can be close to that of the first motor 641, and both are located on the side of the first side plate 603 away from the second side plate 605. Of course, the second motor 646 can also be located on the side of the second side plate 605 away from the first side plate 603. Specifically, the second transmission wheel 648 is a synchronous pulley. The second transmission wheel 648 can be a belt pulley or a steel belt pulley. Specifically, the second transmission belt 647 is a synchronous belt. The second transmission belt 647 can be a belt or a steel belt.

[0186] One end of the second transmission shaft 649 extends through the first side plate 603 and is electrically connected to the second motor 646. The other end of the second transmission shaft 649 is rotatably connected to the second side plate 605. The assembly and transmission method between the second transmission wheel 648 and the second transmission shaft 649 can be similar to the assembly and transmission method between the first transmission wheel 642 and the first transmission shaft 645. The assembly and transmission method between the second transmission wheel 648 and the second transmission belt 647 can be similar to the assembly and transmission method between the first transmission wheel 642 and the second transmission belt 647.

[0187] In this manner, the rotating shaft of the second motor 646, the second transmission shaft 649, the second transmission wheel 648, and the second transmission belt 647 are synchronously rotated, thereby achieving movement of the second conveyor assembly 633 along the positive or positive direction of the X-axis. Since the second conveyor assembly 633 is also conveyed by means of a motor, transmission shaft, transmission wheel, and transmission belt, the second conveyor assembly 633 can be controlled to convey at a constant speed or an actual speed that matches the required theoretical speed with high precision. The circuit board 2000 is also conveyed at a constant speed or an actual speed that matches the required theoretical speed with high precision. This ensures that the speed of the circuit board 2000 during inspection matches the speed detected by the optical inspection equipment, ensuring clear images captured by the optical inspection equipment and accurate inspection results.

[0188] Furthermore, a grating scale, a magnetic scale or other encoder may be provided on the first side plate 603 and / or the second side plate 605 to read the position of the first conveying component 611 and the second conveying component 633 in the X direction in real time, and feed the position information back to the detection mechanism or controller.

[0189] See also Figure 17 , the first conveyor assembly 611 is the upper conveyor assembly, and the second conveyor assembly 633 is the lower conveyor assembly; alternatively, the first conveyor assembly 611 is the lower conveyor assembly, and the second conveyor assembly 633 is the upper conveyor assembly. The so-called "upper conveyor assembly" refers to the conveyor assembly farther from the ground when the conveyor mechanism 600 is installed on the ground. The so-called "lower conveyor assembly" refers to the conveyor assembly closer to the ground when the conveyor mechanism 600 is installed on the ground. In the embodiment of the present application, the first conveyor assembly 611 is used as the upper conveyor assembly, and the second conveyor assembly 633 is used as the lower conveyor assembly for illustration.

[0190] The conveying mechanism 600 provided in the embodiment of the present application can effectively improve the conveying efficiency of the circuit board 2000 by setting a first conveying component 611 and a second conveying component 633 to alternately convey the circuit board 2000 pressed at the front end of the conveying mechanism 600 to the unloading conveying mechanism under the action of the controller.

[0191] Of course, this application does not make any specific limitation on the number of first conveying components 611. In other words, the number of first conveying components 611 can be multiple. This application does not make any specific limitation on the number of second conveying components 633. In other words, the number of second conveying components 633 can be multiple.

[0192] At present, traditional conveying mechanisms for conveying circuit boards generally adopt a combination of upper and lower rollers or a combination of upper and lower belts. For roller-type conveying mechanisms, their defects include at least the following: 1. Image authenticity and efficiency: When the circuit board is conveyed into the image acquisition area by a set of rollers, the head of the circuit board instantly enters the next set of rollers, causing the transmission of the circuit board to be suddenly blocked and slipping. This is manifested as image compression in the captured image, affecting the detection results, causing misjudgment and omission of circuit board detection. When the circuit board is about to leave the image acquisition area, the tail of the board suddenly leaves a set of rollers. At this time, the resistance of the circuit board suddenly decreases, and the transmission speed suddenly increases, causing the same slipping phenomenon. This is manifested as image stretching in the captured image, affecting the detection results, causing misjudgment and omission of circuit board detection. In this way, the captured image is not realistic, affecting the detection efficiency. 2. Roller processing requirements and costs: For roller-type transmission, according to the detection camera parameters and detection accuracy requirements, it is calculated that the equipment has very high requirements for the full runout tolerance of roller processing. The standard specification size of the industry circuit board is 28 inches in width. It is very difficult to achieve this processing accuracy and runout for rollers of this length, and the cost is very high (for example, roller size: diameter 45mm, length 950mm, full runout tolerance is required to be within 0.01mm, and this full runout tolerance requirement is very difficult to process and the cost is very high). 3. Service life: After long-term use, the roller is affected by the load and the stress deformation generated by itself, and the full runout tolerance gradually increases, causing the roller to be scrapped and need to be replaced, with a short service life. 4. Performance stability: During roller transmission, the upper and lower rollers move tangentially. At this time, the roller group can only press one line. Affected by the material of the circuit board itself and the unevenness of the board surface, the collection area is uneven, the image is blurred, affecting the detection results, and the performance is unstable. Furthermore, due to the harsh environment of the PCB manufacturing workshop, the rollers constantly convey PCBs, resulting in a high concentration of dust particles adhering to the roller surfaces. This can contaminate the PCB surfaces, leading to misjudgments and poor performance stability. 5. Difficulties in Maintenance and Commissioning: The roller assembly, consisting of the upper and lower rollers, has very high assembly requirements. The total runout tolerance and parallelism of the upper and lower rollers must be within 0.01mm, and there are fixed requirements for the gap between the upper and lower rollers. This makes commissioning quite complex and presents significant difficulties for maintenance and commissioning.

[0193] Belt-type conveyor mechanisms have at least the following drawbacks: 1. Performance stability: Due to the unevenness of the circuit board's material and surface, it is difficult to maintain smoothness during conveyance on the belt. This, combined with the unevenness of the conveyor belt itself, results in an uneven acquisition area, blurred images, and poor test results, resulting in unstable performance. 2. Service life: The belts, made of polyurethane or other materials, are subject to prolonged friction with the circuit boards, causing wear and tear, requiring frequent replacement and resulting in a short service life. 3. Compatibility: The belts have a tensor mechanism, preventing the upper and lower belts from maintaining contact. Due to the inherent warping of the circuit boards, most boards exhibit localized warping, making contact impossible for thinner boards. This poses limitations and does not meet the general-purpose product requirements of most customers, resulting in low compatibility. 4. Maintenance and commissioning difficulties: The gap between the upper and lower belts in the acquisition section of the equipment is small, making the spacing and parallelism between the two belts complex to adjust, making maintenance and commissioning extremely difficult.

[0194] In this embodiment, a first conveying assembly 611 and a second conveying assembly 633 are provided on the conveying mechanism 600. The first conveying assembly 611 and the second conveying assembly 633 both clamp the circuit board 2000, and then the first conveying assembly 611 and the second conveying assembly 633 are driven by a motor to move along the Y-axis, so that the first conveying assembly 611 drives the circuit board 2000 to gradually move away from the front section of the conveying mechanism 600, and the second conveying assembly 633 drives the circuit board 2000 to gradually move away from the front section of the conveying mechanism 600. Compared with traditional roller transmission or belt transmission, the conveying mechanism 600 provided in the embodiment of the present application is driven by a clamping circuit board 2000 and a motor. Since the motor can stably drive the conveying component (the conveying component includes a first conveying component 611 and a second conveying component 633) to move along the Y-axis direction, the circuit board 2000 will not slip, and the conveying speed of the conveying component can be accurately controlled. For example, the conveying speed of the board (i.e., the circuit board 2000) can be accurately controlled to be conveyed at a constant speed or an actual speed and a required theoretical speed with high precision; at the same time, the head of the circuit board 2000 is clamped by the conveying component, and the tail of the circuit board 2000 is subjected to pressure from the front section of the conveying mechanism 600. In this way, the circuit board 2000 can remain stable and stable in performance during movement, and will not affect the service life of the first conveying component 611 and the second conveying component 633.

[0195] See also Figure 17In this embodiment, the second fixture base 635 is slidably connected to a pair of first guide rails 607 at opposite ends. The second fixture base 635 is also slidably connected to a pair of second guide rails 609 of the frame 601 at opposite ends. Both the second fixture base 635 and the first fixture base 613 extend along the Y-axis. The pair of first guide rails 607 and the second guide rail 609 are arranged along the Z-axis. In other words, the first fixture base 613 and the second fixture base 635 are staggered in the Z-axis.

[0196] See also Figure 17 The first clamp seat 613 is connected to the first transmission belt 643 , and the second clamp seat 635 is connected to the second transmission belt 647 .

[0197] See also Figure 17 The first clamp 615 is mounted on the first clamp seat 613, and the second clamp 637 is mounted on the second clamp seat 635. The first clamp 615 is mounted on the side of the first clamp seat 613 facing the front of the conveyor mechanism 600. The second clamp 637 is also mounted on the side of the second clamp seat 635 facing the front of the conveyor mechanism 600. Both the first clamp 615 and the second clamp 637 are used to clamp the circuit board 2000.

[0198] The structures of the first fixture 615 and the second fixture 637 can be the same or different. Optionally, the first fixture 615 can slide relative to the fixture base along the Z-axis to adjust the height of the first fixture 615. Similarly, the second fixture 637 can also slide relative to the fixture base along the Z-axis to adjust the height of the second fixture 637.

[0199] Optionally, the number of first clamps 615 on the first clamp seat 613 may be one or more. When there are multiple first clamps 615, the heights of the multiple first clamps 615 can be adjusted individually or together. Correspondingly, the number of second clamps 637 may also be one or more. When there are multiple second clamps 637, the heights of the multiple second clamps 637 can be adjusted individually or together.

[0200] In this embodiment, the design of the first clamp 615 includes but is not limited to the following implementations: In this embodiment, the first clamp 615 is used as an upper clamp and the second clamp 637 is used as a lower clamp.

[0201] In the embodiment of the first possible structure of the first clamp, please refer to Figure 18 and Figure 19 The first clamp 615 includes a cylinder base 619, a clamping cylinder 621, a floating joint 631, a clamp movable plate 627 and a clamp fixed plate 629.

[0202] See also Figure 18 and Figure 19 , the cylinder seat 619 is directly or indirectly connected to the first clamp seat 613. The clamping cylinder 621 is arranged on the cylinder seat 619. The floating joint 631 is connected to the clamping cylinder 621 along the positive direction of the Z axis. One end of the floating joint 631 is connected to the clamping cylinder 621, and the other end of the floating joint 631 is connected to the first end of the clamp movable plate 627. The clamp movable plate 627 extends roughly along the X-axis direction. Among them, the second end of the clamp movable plate 627 is provided with a clamp pressure plate 628. The clamp fixing plate 629 is located on the side of the clamp movable plate 627 away from the clamping cylinder 621. The first end of the clamp fixing plate 629 is fixedly connected to the cylinder seat 619. The middle section of the clamp fixing plate 629 is rotatably connected to the middle section of the clamp movable plate 627 through a rotating shaft. The second end of the clamp fixed plate 629 and the second end of the clamp movable plate 627 generate a clamping force against each other under the action of the clamp cylinder 621 and the floating joint 631 to clamp the circuit board 2000 .

[0203] The floating joint 631 is also called a floating coupling. On the one hand, the floating joint 631 can absorb the eccentricity and lack of parallel precision between the clamp movable plate 627 and the clamping cylinder 621, so that the clamp movable plate 627 and the clamping cylinder 621 can also work within the allowable eccentricity range; on the other hand, the floating joint 631 occupies a small volume and has few parts.

[0204] By designing the first clamp 615, the clamping cylinder 621 can push the floating joint 631 in the reverse direction along the Z-axis, causing the first end of the movable clamp plate 627 to move in the reverse direction along the Z-axis, thereby driving the second end of the movable clamp plate 627 to move in the forward direction along the Z-axis. At this point, the clamp pressure plate 628 on the second end of the movable clamp plate 627 separates from the second end of the clamp fixing plate 629, forming an opening. The first motor 641 drives the first transmission belt 643 in the reverse direction along the X-axis, positioning the end of the circuit board 2000 pressed together by the front section of the conveyor mechanism 600 within the opening. The clamping cylinder 621 then pulls the floating joint 631 in the forward direction along the Z-axis, causing the first end of the movable clamp plate 627 to move in the forward direction along the Z-axis, thereby driving the second end of the movable clamp plate 627 to move in the reverse direction along the Z-axis, until the clamp pressure plate 628 on the second end of the movable clamp plate 627 and the second end of the clamp fixing plate 629 clamp the end of the circuit board 2000. The first motor 641 drives the first transmission belt 643 to move in the positive direction of the X-axis, so that the first transmission assembly 611 drives the circuit board 2000 to move in the positive direction along the X-axis.

[0205] It can be understood that the clamping cylinder 621 can control the opening angle of the clamp movable plate 627 relative to the clamp fixed plate 629 to be adjustable, so that the first clamp 615 can clamp circuit boards 2000 of different thicknesses; through the control of the clamping cylinder 621, the clamp movable plate 627 can have sufficient clamping force when clamping the circuit board 2000, thereby stably clamping the circuit board 2000.

[0206] The front end of the clamp (the second end of the movable clamp plate 627) of this application is designed with a clamp pressure plate 628, which can clamp circuit boards 2000 of varying thicknesses, thereby resolving the issue of being unable to inspect thinner boards (e.g., boards with a thickness of 0.05 mm). A serrated structure is provided on the clamp pressure plate 628, and the second end of the clamp fixing plate 629 also has a serrated structure. This increases the friction between the clamp pressure plate 628 and the circuit board 2000, and between the second end of the clamp fixing plate 629 and the circuit board 2000. This increased friction enhances the holding force of the first clamp 615, preventing the circuit board 2000 from slipping during the clamping process.

[0207] Further, see Figure 17 and Figure 18 The first fixture 615 further includes a movable cylinder 617. The movable cylinder 617 is fixed to the first fixture base 613. One movable cylinder 617 can be connected to the cylinder bases 619 of multiple first fixtures 615 via a connecting plate, allowing the multiple first fixtures 615 to move together along the Z-axis. In other words, one movable cylinder 617 is used to adjust the height of the multiple first fixtures 615.

[0208] In other embodiments, a movable cylinder 617 may be connected to a cylinder base 619 of a first fixture 615 to drive the first fixture 615 to move along the Z-axis direction.

[0209] See also Figure 18In an embodiment of a first possible layout of the first clamp, the number of first clamps 615 provided on the first clamp seat 613 is multiple, and the multiple first clamps 615 include at least one first clip 615a and at least one second clip 615b. Optionally, the first clip 615a can be fixed or slid relative to the first clamp seat 613. Optionally, the second clip 615b can be fixed or slid relative to the first clamp seat 613. In this embodiment, both the first clip 615a and the second clip 615b are fixed relative to the first clamp seat 613. The number of first clips 615a can be one, and the number of second clips 615b can be multiple. Optionally, the spacing between adjacent first clips 615a and second clips 615b is less than or equal to the spacing between two adjacent second clips 615b. In other words, the density of the multiple second clips 615b is relatively high. When the first clamp 615a clamps the first end of the board (i.e., circuit board 2000), a different second clamp 615 can be adapted to clamp the second end of the board (i.e., circuit board 2000). In this way, multiple second clamps 615b allow the first conveying assembly 611 to clamp boards (i.e., circuit boards 2000) of different lengths. Of course, in other embodiments, the number of first clamps 615a can be one, and the number of second clamps 615b can be one. Both the first clamp 615a and the second clamp 615b are fixed relative to the first clamp base 613. The first clamp 615a and the second clamp 615b are spaced apart, and the first clamp 615a and the second clamp 615b can clamp boards (i.e., circuit boards 2000) whose length is greater than the distance between the two clamps. In other embodiments, the number of first clamps 615a and the number of second clamps 615b can be one. The first clip 615a is fixed relative to the first clamp seat 613, and the second clip 615b is slidable along the first clamp seat 613. By adjusting the position of the second clip 615b, boards of different sizes (i.e., circuit boards 2000) can be clamped. In other embodiments, the number of first clip 615a can be one, and the number of second clip 615b can be one. Both the first clip 615a and the second clip 615b slide relative to the first clamp seat 613. By adjusting the positions of the first clip 615a and the second clip 615b, boards of different sizes (i.e., circuit boards 2000) can be clamped.

[0210] In this implementation, please refer to Figure 18 Multiple first clamps 615 are arranged on a cylinder moving plate 630, and the cylinder moving plate 630 is connected to the movable cylinder 617 through a guide rail, so that all the first clamps 615 can simultaneously complete the rising and falling actions under the action of the movable cylinder 617.

[0211] For the conveying mechanism 600 , a position signal feedback device such as a grating ruler or other encoder is configured on the first guide rail 607 to feedback the position of the first conveying component 611 in the X direction.

[0212] During operation, the first conveyor assembly 611 removes the circuit board 2000 at a uniform (or non-uniform) speed via the first motor 641. After removal, all first clamps 615 simultaneously open to grip the circuit board 2000. All first clamps 615 simultaneously open again to drop the circuit board 2000 into the unloading conveyor mechanism for delivery. Then, all first clamps 615 return to their initial positions via the movable cylinder 617, and the next conveying cycle is repeated. Controlling the Z-axis position of all first clamps 615 using a single movable cylinder 617 reduces the number of cylinders in the Z-axis and ensures uniform Z-axis height for all first clamps 615.

[0213] See also Figure 20 The structure of the second conveying assembly 633 is substantially the same as that of the first conveying assembly 611 . The difference between the second conveying assembly 633 and the first conveying assembly 611 lies in the difference between the first clamp 615 and the second clamp 637 .

[0214] See also Figure 19 and Figure 21 In the first embodiment of the possible second clamp structure, the second clamp 637 has substantially the same structure as the first clamp 615. The second clamp 637 includes a cylinder base 619, a clamping cylinder 621, a movable clamp plate 627, and a fixed clamp plate 629. Optionally, the second clamp 637 may further include a floating joint 631 and a movable cylinder 617.

[0215] The main difference between the second jig 637 and the first jig 615 is that the clamping cylinder 621 of the first jig 615 is located on the side of the clamp movable plate 627 facing away from the clamp fixed plate 629. The clamping cylinder 621 of the second jig 637 is located on the side of the clamp fixed plate 629 away from the clamp movable plate 627. In other words, along the Z-axis, the clamping cylinder 621 of the first jig 615, the clamp movable plate 627 of the first jig 615, and the clamp fixed plate 629 of the first jig 615 are arranged in sequence. The clamp movable plate 627 of the second jig 637, the clamp fixed plate 629 of the second jig 637, and the clamping cylinder 621 of the second jig are arranged in sequence.

[0216] For details, please refer to Figure 21The clamping cylinder 621, clamp fixing plate 629, and clamp movable plate 627 of the second clamp 637 are sequentially arranged along the positive direction of the Z axis. The principle of clamping and releasing the circuit board 2000 by the second clamp 637 can be referred to the principle of clamping and releasing the circuit board 2000 by the first clamp 615, and will not be repeated here.

[0217] In this embodiment, please refer to Figure 17 Along the Z-axis, the first clamp 615 is located on a side of the first clamp seat 613 that is close to the second clamp seat 635. The second clamp 637 is located on a side of the second clamp seat 635 that is close to the first clamp seat 613, so that both the first clamp 615 and the second clamp 637 are close to the circuit board 2000, thereby reducing the distance between the first clamp 615 and the second clamp 637 that needs to be adjusted in the Z-axis direction. Of course, in other embodiments, the first clamp 615 is located on a side of the first clamp seat 613 that is away from the second clamp seat 635; and the second clamp 637 is located on a side of the second clamp seat 635 that is close to the first clamp seat 613. Alternatively, the first clamp 615 is located on a side of the first clamp seat 613 that is away from the second clamp seat 635; and the second clamp 637 is located on a side of the second clamp seat 635 that is away from the first clamp seat 613. Alternatively, the first clamp 615 is disposed on a side of the first clamp seat 613 close to the second clamp seat 635 ; and the second clamp 637 is disposed on a side of the second clamp seat 635 away from the first clamp seat 613 .

[0218] During the process of the first conveyor assembly 611 conveying the circuit board 2000, for position adjustment in the X-axis direction, the first motor 641 conveys the first conveyor assembly 611 to a position close to the circuit board 2000. For position adjustment in the Y-axis direction, a first clamp 615a of the first conveyor assembly 611 is positioned close to the first side plate 603, while a second clamp 615b of the first conveyor assembly 611 slides along the first clamp seat 613 to a suitable position based on the Y-axis dimensions of the circuit board 2000, so that the first clamp 615a and the second clamp 615b can stably clamp the edge of the circuit board 2000 extending in the Y-axis direction. For position adjustment in the Z-axis direction, the movable cylinder 617 adjusts the position of the first clamp 615 in the Z-axis direction so that the height of the clamp fixing plate 629 of the first clamp 615 matches the height of the bottom side of the circuit board 2000. During the clamping control process, the clamping cylinder 621 acts on the clamp movable plate 627 via the floating joint 631, causing the second end of the clamp movable plate 627 to open to a suitable angle relative to the clamp fixed plate 629, allowing the first clamp 615 to clamp the circuit board 2000. When the first clamp 615 is opened to the appropriate angle, the first motor 641 moves the first conveyor assembly 611 closer to the circuit board 2000, allowing the edge of the circuit board 2000 to enter the opening of the first clamp 615 by a certain distance. The clamping cylinder 621 acts on the clamp movable plate 627 via the floating joint 631, closing the opening of the first clamp 615 and clamping the circuit board 2000. The first motor 641 drives the first conveyor assembly 611 to move the circuit board 2000 away from the front section of the conveyor mechanism 600 at a precisely controlled speed. When the conveying mechanism 600 is used for optical inspection, the inspection mechanism detects defects on the circuit board 2000, and the first motor 641 controls the speed of the circuit board 2000 to match the speed of the inspection mechanism to improve the quality of the inspection image.

[0219] It is understood that the structure and conveying process of the second conveyor assembly 633 can be referenced to that of the first conveyor assembly 611. The differences between the structure of the second clamp 637 and the structure of the first clamp 615 can be found in the above description and will not be repeated here. The principle of conveying the circuit board 2000 by the second conveyor assembly 633 can be referenced to the principle of conveying the circuit board 2000 by the first conveyor assembly 611 and will not be repeated here.

[0220] See also Figure 21Optionally, in an embodiment of the first possible layout of the second clamp, the second clamp 637 includes at least one third clamp 637a and at least one fourth clamp 637b. The third clamp 637a and the fourth clamp 637b can be fixed or slid relative to the second clamp base 630. For example, the third clamp 637a and the fourth clamp 637b are both fixed relative to the second clamp base 630. There is one third clamp 637a and a plurality of fourth clamps 637b. The distance between adjacent third clamps 637a and fourth clamps 637b is greater than the distance between two adjacent fourth clamps 637b, so that the third clamp 637a and the fourth clamp 637b can clamp panels of different lengths (i.e., circuit boards 2000). The first clamp 615a and the third clamp 637a can be arranged collinearly in the X-axis direction, or they can be staggered in the X-axis direction. The second clip 615b and the fourth clip 637b may be collinearly arranged in the X-axis direction, or may be staggered in the X-axis direction.

[0221] The second fixture 630 of the second conveyor assembly 633 is mounted on a pair of second guide rails 609. The second guide rails 609 are equipped with a grating ruler or other encoder position signal feedback device to feedback the position of the second conveyor assembly 633 in the X direction, and transport the inspected circuit board 2000 out of the device.

[0222] By arranging multiple relatively dense clamps along the Y-axis direction, it is compatible with circuit boards 2000 of any size, and has high compatibility. The transmission component of the present application adopts a modular design, which is convenient for debugging and maintenance.

[0223] For a second possible arrangement of the first fixture, see Figures 22 to 24 The first clamp 615 includes at least one first clamp 615a and at least one second clamp 615b. The first clamp 615a is a fixed clamp fixed relative to the first clamp seat 613, and the position of the first clamp 615a can be fixed at a reference position. The second clamp 615b is a movable clamp relative to the first clamp seat 613. The second clamp 615b is provided on the belt module on the first clamp seat 613, and can be moved relative to the first clamp seat 613 under the action of the belt module. According to the size information of the circuit board 2000 in the Y-axis direction, the position of the second clamp 615b in the Y-direction is changed by the belt module, so that the first conveying component 611 can be suitable for conveying circuit boards 2000 of any size. It can be understood that the belt module can be replaced by a ball screw or a linear motor.

[0224] Specifically, the belt module includes a third motor 651, at least one third transmission belt 653, and at least two third transmission pulleys 655. The third motor 651, the third transmission belt 653, and the third transmission pulleys 655 can all be mounted on the first fixture base. The third transmission belt 653 can be positioned along the Y-axis. When the first clamp 615a is positioned near the first side plate 603, the third transmission belt 653 can be positioned relatively close to the second side plate 605. The two third transmission pulleys 655 can be axially positioned along the Z-axis. Of course, in other embodiments, the axial directions of the two third transmission pulleys 655 can be positioned along the X-axis by changing the mounting surfaces of the two third transmission pulleys 655. The rotating shaft of the third motor 651 can be directly or indirectly connected to the rotating shaft of one third transmission pulley 655, and the third transmission belt 653 can be mounted on the two third transmission pulleys 655. The second clamp 615b is mounted on the third transmission belt 653. When the third motor 651 drives the rotating shaft of the third transmission wheel 655 to rotate, the third transmission wheel 655 drives the third transmission belt 653 to transmit, thereby driving the second clamp 615b to move along the Y-axis direction, so as to adjust the position of the second clamp 615b in the Y-axis direction, thereby clamping circuit boards 2000 with different Y-axis sizes.

[0225] In addition, the first clamp seat 613 is provided with a plurality of grating scales, magnetic scales or other encoders and other position signals to read the position of the second clamp 615b in the X direction in real time, so as to feed back the position information of the second clamp 615b to the controller.

[0226] See also Figure 25 and Figure 26 The principle of the first conveying assembly 611 conveying the circuit board 2000 is as follows: first, according to the size information of the circuit board 2000, the position of the second clamp 615b is adjusted by the belt module. When the first conveying assembly 611 moves to a suitable position, the first clamp 615a and the second clamp 615b are controlled to open at the same time, and the first clamp 615a and the second clamp 615b are lowered to the Z-direction conveying height by the movable cylinder 617. Then, the first conveying assembly 611 is conveyed to the to-be-transmitted position by the first motor 641. After reaching the position, the first clamp 615a and the second clamp 615b are closed at the same time, and the circuit board 2000 is taken out at a constant speed by the first motor 641. After taking out, the first clamp 615a and the second clamp 615b are opened at the same time to release the circuit board 2000, and the circuit board 2000 falls into the unloading conveyor and is sent out. Then the first clamp 615a and the second clamp 615b are returned to the initial position by the movable cylinder 617, and the next conveying is repeated.

[0227] In the embodiment of the second possible structure of the first clamp, please refer to Figure 26 The first clamp 615 includes a cylinder seat 619, a clamping cylinder 621, a clamp connecting rod 623, a clamp bearing 625, a clamp movable plate 627 and a clamp fixing plate 629.

[0228] See also Figure 18 and Figure 19 The cylinder seat 619 is directly or indirectly connected to the first clamp seat 613. The clamping cylinder 621 is arranged on the cylinder seat 619. The clamp bearing 625, the clamp connecting rod 623 and the clamping cylinder 621 are connected in sequence along the positive direction of the Z axis. One end of the clamp connecting rod 623 is connected to the clamping cylinder 621, the other end of the clamp connecting rod 623 is connected to one end of the clamp bearing 625, and the other end of the clamp bearing 625 is connected to the first end of the clamp movable plate 627. The clamp movable plate 627 extends roughly along the X-axis direction. Among them, the second end of the clamp movable plate 627 is provided with a clamp pressure plate 628. The clamp fixing plate 629 is located on the side of the clamp movable plate 627 away from the clamping cylinder 621. The first end of the clamp fixing plate 629 is fixedly connected to the cylinder seat 619. The middle section of the clamp fixing plate 629 is rotatably connected to the middle section of the clamp movable plate 627 via a rotating shaft. The second end of the clamp fixed plate 629 and the second end of the clamp movable plate 627 generate a clamping force against each other under the action of the clamp cylinder 621 and the floating joint 631 to clamp the circuit board 2000 .

[0229] The clamp of the present application adopts a connecting rod structure design, which is simple and reliable, has no friction damage, has a long service life, and is simple and convenient to debug and maintain.

[0230] Further, see Figure 27 The first fixture 615 further includes a movable cylinder 617. The movable cylinder 617 is fixed to the first fixture base 613. One movable cylinder 617 can be connected to the cylinder base 619 of one first fixture 615 to drive one first fixture 615 to move along the Z-axis direction.

[0231] In the embodiment of the second possible structure of the second clamp, please refer to Figure 28 and Figure 29 The second clamp 637 has a substantially similar structure to the first clamp 615. The second clamp 637 includes a cylinder base 619, a clamping cylinder 621, a clamp movable plate 627, and a clamp fixed plate 629. Optionally, the second clamp 637 may further include a clamp connecting rod 623 and a clamp bearing 625.

[0232] The main difference between the second clamp 637 and the first clamp 615 is that the clamping cylinder 621 of the first clamp 615 is located on the side of the clamp movable plate 627 away from the clamp fixed plate 629. The clamping cylinder 621 of the second clamp 637 is located on the side of the clamp fixed plate 629 away from the clamp movable plate 627.

[0233] See also Figure 28 and Figure 29In an embodiment of the second possible layout of the second clamp, the second clamp 637 includes a third clamp 637a fixed relative to the second clamp seat 635, and a fourth clamp 637b movable relative to the second clamp seat 635. The driving structure for the fourth clamp 637b to move along the second clamp seat 635 can refer to the driving structure for the second clamp 615b to move along the first clamp seat 613, and will not be repeated here. The structure of the second clamp 637 is roughly the same as that of the first clamp 615. The main difference between the second clamp 637 and the first clamp 615 is that the clamping cylinder 621 of the first clamp 615 is located on the side of the clamp movable plate 627 away from the clamp fixed plate 629. The clamping cylinder 621 of the second clamp 637 is located on the side of the clamp fixed plate 629 away from the clamp movable plate 627. In other words, along the Z-axis direction, the clamping cylinder 621 of the first clamp 615, the clamp movable plate 627 of the first clamp 615, and the clamp fixed plate 629 of the first clamp 615 are arranged in sequence. The clamp movable plate 627 of the second clamp 637, the clamp fixed plate 629 of the second clamp 637, and the clamping cylinder 621 of the second clamp are arranged in sequence.

[0234] Understandable, see Figure 27 and Figure 28 The structure of the second conveyor assembly 633 can be referenced to that of the first conveyor assembly 611. The differences between the structures of the first clamp 615 and the second clamp 637 can be found in the above description and will not be repeated here. The principle of conveying circuit boards 2000 by the second conveyor assembly 633 can be referenced to the principle of conveying circuit boards 2000 by the first conveyor assembly 611 and will not be repeated here. In this embodiment, the first conveyor assembly 611 and the second conveyor assembly 633 can also alternately convey circuit boards 2000 to increase the efficiency of conveying circuit boards 2000.

[0235] The specific action process is as follows: after the circuit board 2000 is transferred to the transfer waiting position, the fourth clamp 637b of the second conveying assembly 633 adjusts the clamp position according to the size of the circuit board 2000, the second clamp 615b and the first clamp 615a of the first conveying assembly 611 are opened, the movable cylinder 617 of the second conveying assembly 633 is raised, and the second conveying assembly 633 moves to the waiting position through the second guide rail 609. The clamp of the second conveying assembly 633 is closed to clamp the circuit board 2000, and then the circuit board 2000 is taken out at a uniform speed through the second guide rail 609 until all the circuit boards 2000 pass the collection position. Similarly, the first conveying assembly 611 completes the conveying according to the same process. The first conveying assembly 611 and the second conveying assembly 633 convey alternately to improve efficiency. The conveyed circuit board 2000 falls directly into the unloading conveying mechanism below, and the circuit board 2000 is sent out through the unloading conveying mechanism.

[0236] Compared with the traditional transmission method for automatic optical inspection of circuit boards 2000, the present application effectively solves the problem of unrealistic captured images caused by traditional roller transmission and belt transmission, and adopts a transmission mechanism 600 with a clamp and uses a first transmission component 611 and a second transmission component 633 for alternating transmission. At the same time, a grating scale or other encoder and other position signal feedback devices are configured in the X-axis direction of the transmission component to ensure the smoothness and production efficiency of the transmission of the circuit board 2000. The transmission method using a clamp can effectively prevent the circuit board 2000 from slipping during the transmission process, thereby ensuring the authenticity of the image captured when the transmission mechanism 600 is used for optical inspection equipment.

[0237] In a sixth aspect, the present application provides examples to illustrate the structure of the unloading and conveying mechanism 900. Of course, the present application includes but is not limited to the unloading and conveying mechanism 900 provided in the following embodiments.

[0238] See also Figure 1 and Figure 30 The unloading conveying mechanism 900 is connected to the discharge end of the conveying mechanism 600. The unloading conveying mechanism 900 is arranged on the frame 601. The unloading conveying mechanism 900 is located between the first conveying assembly 611 and the second conveying assembly 633. The unloading conveying mechanism 900 includes an unloading conveying motor 901, an unloading driving shaft 903, multiple belts 905, multiple tensioning idler pulleys 907 and multiple driven pulleys 911. The unloading driving shaft 903, the driven pulleys 911 and the at least one tensioning idler pulley 907 are used to tension the belts 905. Multiple belts 905 share a unloading driving shaft 903, and each belt 905 corresponds to a driven pulley 911 and at least one tensioning idler pulley 907.

[0239] See also Figure 30 , multiple belts 905 all extend along the Y-axis. A second gap is formed between the multiple belts 905. A second fixture 637 extends through the second gap to convey the circuit board 2000 above the unloading conveyor mechanism 900. The unloading conveyor motor 901 is connected to the unloading drive shaft 903 to drive the unloading drive shaft 903, driving the multiple belts 905 to move synchronously.

[0240] See also Figure 1 、 Figure 17 and Figure 30, the multiple second clamps 637 of the conveying mechanism 600 are arranged at intervals. The gaps between the multiple second clamps 637 can be equal or different. There are multiple belts 905, and each belt 905 is arranged between two adjacent second clamps 637. The width dimension of the belt 905 along the Y-axis direction is adapted to the gap between the two adjacent second clamps 637. In the positive direction along the Y-axis, the distance between the third clamp 637c and the fourth clamp 637d is relatively large. At this time, the belt 905 arranged between the third clamp 637c and the fourth clamp 637d can be a wide flat belt, and accordingly, the tension idler 907 is a wide tension idler, and the driven pulley 911 is a wide driven pulley. The distance between the two adjacent fourth clamps 637d is relatively small. At this time, the belt 905 provided between two adjacent fourth clamps 637d can be a narrow flat belt. Accordingly, the tension idler wheel 907 is a narrow tension idler wheel, and the driven wheel 911 is a narrow driven wheel.

[0241] The power of the unloading conveyor motor 901 is transmitted to the unloading drive shaft 903 via a synchronous belt. Mounted on this drive shaft 903 are a wide flat belt and several sets of narrow flat belts, with belts 905 spaced apart. The gaps between belts 905 allow the second clamp 637 to be exposed, facilitating the gripping and movement of circuit boards 2000. At the other end of the belts 905 are wide driven pulleys and several sets of narrow driven pulleys. Under each belt 905 are tensioning idler pulleys 907, including a wide tensioning idler pulley and several sets of narrow tensioning idler pulleys. After the second clamp 637 has retrieved the circuit board 2000, it can be opened and raised or lowered in the Z direction to a desired clearance height. The unloading conveyor mechanism 900 then removes the circuit board 2000, making transport simple and convenient.

[0242] After the circuit board 2000 is straightened by the straightening mechanism 100, it enters the connecting wheel mechanism 300. The thickness sensor measures the thickness of the circuit board 2000, and then the circuit board 2000 is transported to the board loading and unloading position. At this time, the detection and adjustment device 805 adjusts the height of the first detection mechanism 801 based on the thickness measurement data. The conveyor mechanism 600 begins to convey the board from the loading and unloading position through the inspection area. The first and second detection mechanisms 801 and 831 complete image acquisition with the support of the upper and lower light source mechanisms. The first conveyor assembly 611 and the second conveyor assembly 633 of the conveyor mechanism 600 alternately convey the board, improving production efficiency. After the acquisition is completed, the circuit board 2000 is transported out of the equipment through the unloading conveyor mechanism 900, completing the rectification and inspection process.

[0243] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An optical inspection device for inspecting circuit boards, characterized in that: include: A board-aligning mechanism, the board-aligning mechanism being used to align the plurality of circuit boards along a first direction, the board-aligning mechanism comprising a conveyor table, a plurality of rows of adjustment mechanism groups, each row of the adjustment mechanism groups comprising a plurality of adjustment mechanisms, the adjustment mechanisms comprising a transmission wheel, a first transmission assembly, a second transmission assembly, a third transmission assembly, a fourth transmission assembly, a first drive assembly, and a second drive assembly; The first transmission assembly is connected to the transmission wheel, and the first transmission assembly includes a first bevel gear, and the axial direction of the first bevel gear is parallel to the axial direction of the transmission wheel; The second transmission assembly includes a second bevel gear and a third bevel gear coaxially connected, the second bevel gear is provided on a side of the transmission wheel away from the conveying platform, and the axial direction of the second bevel gear is perpendicular to the conveying platform; the second bevel gear is meshed with the first bevel gear, and the third bevel gear is located on a side of the second bevel gear away from the transmission wheel, and the third bevel gear is meshed with the third transmission assembly; The fourth transmission assembly includes a third spur gear, a rack, and a connecting rod. The third spur gear is located on a side of the third transmission assembly facing away from the second transmission assembly, and the axial direction of the third spur gear is collinear with the axial direction of the second transmission assembly. The rack is meshed with the third spur gear. One end of the connecting rod is fixedly connected to the support base of the transmission wheel, and the other end of the connecting rod passes over the second transmission assembly and is fixedly connected to the rotating shaft of the third spur gear. The first drive assembly drives all the transmission wheels to roll on the conveyor platform through the third transmission assembly, the second bevel gear of the second transmission assembly, the third bevel gear, and the first bevel gear of the first transmission assembly, so as to realize the transmission of the circuit board; wherein, when the second transmission assembly rotates, it can drive the first bevel gear to rotate, and the transmission wheels rotate under the drive of the first bevel gear of the first transmission assembly; The second drive assembly drives the transmission wheels of each row to deflect in angle through the fourth transmission assembly and the first bevel gear of the first transmission assembly; wherein the first bevel gear can rotate around the second bevel gear to achieve a change in direction of the transmission wheels; A pressing wheel mechanism, the pressing wheel mechanism being connected to the discharge end of the board-straightening mechanism and being used to flatten the circuit board; a conveying mechanism, the conveying mechanism being connected to the discharge end of the pressing wheel mechanism and being used to convey the circuit board at a preset speed; and The detection mechanism is arranged on the pressure wheel mechanism, and the detection mechanism is used to detect the board surface of the circuit board during the process of the circuit board being transported by the conveying mechanism; the detection mechanism includes a first detection mechanism, when the conveying mechanism transports the circuit board, the first detection mechanism detects defects on the first surface of the circuit board by collecting images.

2. The optical detection device according to claim 1, wherein The whole plate mechanism includes a machine platform, an adjustment mechanism combination and multiple second drive components. The adjustment mechanism combination is arranged on the machine platform. The conveying platform is arranged on the machine platform and covers the adjustment mechanism combination. The adjustment mechanism combination includes the multiple rows of adjustment mechanism groups.

3. The optical detection device according to claim 2, characterized in that The first transmission assembly includes a first spur gear and a second spur gear. The first spur gear is coaxially connected to the transmission wheel. The rotation axis of the transmission wheel is parallel to the conveying platform. The rotation axis of the second spur gear is parallel to the rotation axis of the first spur gear. The second spur gear is located on a side of the first spur gear away from the conveying platform and is meshed with the first spur gear. The first bevel gear is coaxially connected to the second spur gear. The third transmission assembly includes a driving shaft and a fourth bevel gear disposed on the periphery of the driving shaft. The axial direction of the driving shaft is perpendicular to the axial direction of the second transmission assembly. The fourth bevel gear is meshed and connected with the third bevel gear.

4. The optical detection device according to claim 1, wherein: The pressure wheel mechanism includes a pressure wheel assembly and a support wheel assembly, the pressure wheel assembly and the support wheel assembly are arranged opposite to each other and spaced apart, and the first gap formed between the pressure wheel assembly and the support wheel assembly is used to convey the circuit board; the pressure wheel assembly includes a first pressure wheel group and a second pressure wheel group, the first pressure wheel group is close to the conveying mechanism relative to the second pressure wheel group, and the support wheel assembly includes a first support wheel group and a second support wheel group, the first pressure wheel group is arranged opposite to the first support wheel group, and in the conveying direction of the circuit board, the second pressure wheel group is located between the first support wheel group and the second support wheel group.

5. The optical detection device according to claim 4, characterized in that The first pressing wheel group includes a first elastic buffer and a first pressing wheel connected to the first elastic buffer, the first pressing wheel is used to press the circuit board, and the first elastic buffer is located on the side of the first pressing wheel away from the circuit board; the second pressing wheel group includes a second elastic buffer and a second pressing wheel connected to the second elastic buffer, the second pressing wheel is used to press the circuit board, and the second elastic buffer is located on the side of the second pressing wheel away from the circuit board.

6. The optical detection device according to claim 4, characterized in that The detection mechanism includes the first detection mechanism and the second detection mechanism. The first detection mechanism is arranged on the side of the pressure wheel assembly facing away from the circuit board, and the second detection mechanism is arranged on the side of the support wheel assembly facing away from the circuit board. When the conveying mechanism conveys the circuit board, the second detection mechanism detects defects on the second surface of the circuit board by collecting images.

7. The optical detection device according to claim 6, wherein: The first detection mechanism also includes a detection mounting seat, a detection adjustment device, at least one camera seat, a camera adjustment device, at least one camera lens, a thickness sensor, a coaxial light source and a side light source. The detection mounting seat is arranged on the pressure wheel mechanism, the detection adjustment device is arranged on the detection mounting seat, the camera seat is arranged on the detection adjustment device, the camera adjustment device is arranged on the camera seat, and the camera lens is arranged on the camera adjustment device; the thickness sensor is arranged on the detection mounting seat, and the thickness sensor is used to detect the thickness of the circuit board so that the detection adjustment device adjusts the distance between the acquisition camera and the circuit board according to the thickness of the circuit board; the camera adjustment device is used to adjust the axial direction of the camera lens, the coaxial light source and the side light source are both arranged on the detection mounting seat, and the coaxial light source and the side light source are both used to provide fill light when the acquisition camera acquires images.

8. The optical detection device according to claim 1, wherein: The conveying mechanism includes a frame, a first conveying component, a second conveying component and a controller, the first conveying component is arranged on the frame, the first conveying component is used to clamp the circuit board, the second conveying component is arranged on the frame, the second conveying component and the first conveying component are staggered, the first conveying component and the second conveying component are both slidably connected to the frame, the second conveying component is used to clamp the circuit board, and the controller is used to control the first conveying component and the second conveying component to alternately convey the circuit board.

9. The optical detection device according to claim 8, wherein: The first conveying assembly includes a first clamp seat and at least one first clamp provided on the first clamp seat, the second conveying assembly includes a second clamp seat and at least one second clamp provided on the second clamp seat, the first clamp seat and the second clamp seat having opposite ends slidably connected to opposite sides of the frame; the second clamp seat and the first clamp seat are staggered in a second direction, and the second direction is perpendicular to the first direction; The first clamp is arranged on a side of the first clamp seat close to the second clamp seat; the second clamp is arranged on a side of the second clamp seat close to the first clamp seat.

10. The optical detection device according to claim 9, wherein: The optical inspection equipment also includes a material unloading conveying mechanism, which is connected to the discharge end of the conveying mechanism, and the material unloading conveying mechanism is arranged on the frame, and the material unloading conveying mechanism is located between the first conveying component and the second conveying component; the material unloading conveying mechanism includes a material unloading conveying motor, a material unloading driving shaft, multiple belts, multiple tensioning idler wheels and multiple driven wheels, the material unloading driving shaft, the driven wheel and at least one tensioning idler wheel are used to tension the belts, the multiple belts extend along the first direction, and a second gap is formed between the multiple belts. The second clamp passes through the second gap to convey the circuit board, and the material unloading conveying motor is connected to the material unloading driving shaft to drive the material unloading driving shaft to drive the multiple belts to move synchronously.

Images