Circuit board conveying apparatus

Abstract

The application discloses a circuit board conveying device, which comprises two track plates arranged in parallel, and a blocking device. The opposite sides of the two track plates are respectively provided with a conveyor belt. The blocking device comprises a driving mechanism and a blocking piece. The blocking piece is connected to the driving mechanism, and the driving mechanism drives the blocking piece to switch between a blocking state and an avoiding state. In the blocking state, the blocking piece is close to or abuts against the upper surface of the conveyor belt to block the circuit board conveyed on the conveyor belt. In the avoiding state, the blocking piece is away from the conveyor belt to avoid the circuit board. At least one of the track plates is provided with the blocking device. The conveying device directly contacts the track conveying contact edges on the left and right sides of the circuit board through the blocking piece to achieve blocking, effectively avoids the positioning deviation problem caused by contacting the special-shaped process edge in the traditional blocking structure, and ensures that the circuit board can accurately stay at a detection position.

Description

Technical Field

[0001] This application relates to the technical field of circuit board manufacturing equipment, and more particularly to a circuit board conveying device. Background Technology

[0002] During the production of circuit boards, it is necessary to position the circuit boards in the transfer process in order to install or test components.

[0003] Currently, the blocking structures commonly used for positioning circuit boards are relatively simple in design, typically using a stop to block the forward end of the circuit board for positioning. However, for some irregularly shaped circuit boards, the process edges at the forward end may have various irregularities, making traditional blocking structures difficult to adapt. This compatibility issue is particularly prominent in production scenarios that require handling various types of irregularly shaped boards. For example, when there are protruding components or notches on the process edges of the PCB board's forward end, the PCB cannot stop at the accurate detection position as preset, ultimately affecting detection accuracy and even causing detection errors or equipment malfunctions. Furthermore, since different irregularly shaped PCB boards may have different notches and protrusions, they will stop at different positions, thus existing blocking structures also have the problem of being incompatible with the precise positioning requirements of various PCB board models. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a circuit board conveying device that can solve the above-mentioned problems existing in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution: A circuit board conveying device, comprising: The track slab includes two parallel track slabs; each of the two track slabs has a conveyor belt on its opposite side. A blocking device includes a driving mechanism and a blocking member. The blocking member is connected to the driving mechanism, and the driving mechanism drives the blocking member to switch between a blocking state and a avoiding state. In the blocking state, the blocking member approaches or abuts the upper surface of the conveyor belt to block the circuit board being transported on the conveyor belt. In the avoiding state, the blocking member moves away from the conveyor belt to avoid the circuit board. At least one of the track plates is equipped with the blocking device.

[0006] In this embodiment, the conveying device achieves blocking by having the blocking component directly contact the track conveying contact edges on both sides of the circuit board. As a fixed-shape process edge, the track conveying contact edge has no protrusions, notches, or other irregular structures, allowing for stable and reliable contact with the blocking component. This effectively avoids the positioning deviation problems caused by traditional blocking structures contacting irregular process edges, ensuring the circuit board accurately stops at the detection position. For different models of irregularly shaped PCBs, the structure of the track conveying contact edge typically maintains a standardized design, unaffected by irregular features in other areas. Therefore, the same blocking device can adapt to multiple circuit board models, eliminating the need for frequent adjustments to the blocking structure based on the board model, significantly improving the equipment's adaptability to diverse production scenarios. The blocking component only contacts the track conveying contact edge where no components are distributed, avoiding collisions with protruding components on the circuit board body or non-track contact surface process edges, reducing the risk of component damage and ensuring the production quality of the circuit board. Optionally, the driving mechanism drives the blocking member to rotate or move up and down, thereby switching the blocking member between the blocking state and the avoidance state.

[0007] In this embodiment, the rotational or lifting motions employed are mature forms of mechanical transmission, characterized by simple structure and high transmission efficiency. The drive mechanism, through precise control of the rotation angle or lifting height, ensures the positional accuracy of the blocking component when switching between the two states, avoiding blocking failures caused by motion jamming or offset, and further guaranteeing the stability of circuit board positioning. The drive mechanism's control of the blocking component's rotation or lifting can be rapidly triggered by electrical signals, with quick state switching response, meeting the requirements of circuit board conveying rhythm in high-speed production lines. Furthermore, the mechanical structures of both motion forms are easy to maintain, and equipment performance can be optimized and operational difficulty reduced by adjusting drive parameters (such as rotational speed and lifting rate). Optionally, the blocking member includes a connecting arm and a blocking head connected at an angle to each other. The connecting arm is connected to the drive mechanism. In the blocking state, the blocking head extends from top to bottom relative to the connecting arm to approach or abut against the upper surface of the conveyor belt, thereby blocking the circuit board.

[0008] In this embodiment, the connecting arm and the blocking head adopt a bending and steering structure at an angle to each other, which fully adapts to the space restriction that the blocking component can only move in the area above the circuit board. This design ensures that the drive mechanism can drive the blocking component to rotate or rise normally, while shortening the vertical height of the entire blocking device by extending the blocking head downward. This avoids the problem of excessive overall height caused by the drive mechanism directly driving linear components, making the entire blocking device structure more compact and saving the vertical space of the equipment. It is especially suitable for production scenarios where the installation height is limited.

[0009] Optionally, the drive mechanism is mounted on the top of the track plate or on the side of the track plate facing away from the conveyor belt.

[0010] Regardless of whether the drive mechanism is installed on the top or side, it is connected to the blocking head via a connecting arm. In this embodiment, the drive mechanism is installed on the top of the track plate or on the side facing away from the conveyor belt, away from the conveyor belt and circuit board transport channel. This spatial layout completely eliminates the possibility of mechanical interference between the drive mechanism and the circuit board or conveyor belt, avoiding equipment failure or circuit board damage caused by structural collisions, and ensuring the safety and stability of equipment operation.

[0011] Optionally, the drive mechanism includes a power unit and a mounting head, the mounting head being mounted on the output end of the power unit, and the blocking member being mounted on the mounting head; The mounting head is equipped with an adjustable adjusting screw, which limits the travel of the mounting head.

[0012] In this embodiment, the adjustable set screw directly limits the maximum travel of the mounting head through mechanical limiting, ensuring a stable vertical distance between the blocking component and the conveyor belt while in the blocking state. This avoids inconsistencies in spacing caused by power unit output errors (such as cylinder air pressure fluctuations and motor speed deviations), ensuring that the blocking effect on circuit boards of different thicknesses meets requirements. The blocking distance can be quickly adjusted by adjusting the set screw, allowing the equipment to adapt to circuit boards of different thicknesses or different types of conveyor belts (such as belts of varying thicknesses) without needing to replace the blocking component or adjust drive mechanism parameters. This significantly improves the equipment's adaptability to diverse production needs and reduces the time cost of changeover and debugging.

[0013] Optionally, the drive mechanism includes a power unit and a mounting head. The mounting head is mounted on the output end of the power unit, and the blocking member is mounted on the mounting head. The blocking member is telescopically connected to the mounting head, and its telescopic direction extends horizontally.

[0014] In this embodiment, the blocking component and the mounting head can extend and retract relative to each other in the horizontal direction. This adjustable horizontal position of the blocking component ensures that the blocking head can accurately align with the track conveyor contact edge of the circuit board, avoiding blocking failure due to horizontal position deviation. This dual control further enhances the accuracy of the blocking. In use, by adjusting the horizontal position of the blocking component, it can accommodate circuit boards of different widths or with different track conveyor contact edge positions without requiring replacement of the blocking component or large-scale equipment modifications. This significantly improves the equipment's adaptability to diverse production needs and reduces the time and cost of changeover and debugging. Optionally, the drive mechanism includes a mounting base, a power unit, and a mounting head, wherein the mounting base is mounted on the track plate, and the power unit is mounted on the mounting base.

[0015] In this embodiment, the mounting base, as an independent connecting component, increases the contact area between the drive mechanism and the track plate, and enhances the rigidity of the overall structure through multi-point fixing. Compared to the method of directly mounting the power unit to the track plate, the mounting base can effectively disperse the vibration and impact force generated by the power unit during operation, reduce the problem of loosening of connections due to long-term operation, ensure stable power output, and improve the consistency of blocking positioning. The mounting base can effectively limit the displacement range of the power unit, avoid the power unit from falling off or shifting due to accidental collisions or vibrations, and reduce safety hazards during equipment operation.

[0016] Optionally, the power unit includes a linear telescopic shaft, the mounting base is provided with a guide portion, the linear telescopic shaft passes through the guide portion and is connected to the mounting head, and the linear reciprocating motion of the linear telescopic shaft is guided by the guide portion.

[0017] In this embodiment, the guide section provides precise motion constraints for the linear telescopic shaft, ensuring it maintains a preset trajectory during long-term, high-frequency reciprocating motion and reducing positional deviations of the mounting head and blocking components caused by shaft wobbling. This design effectively improves the accuracy of blocking component state switching, making the blocking head more stable in vertical movement and further ensuring the consistency of circuit board positioning. Simultaneously, because the guide section reduces friction and collision between the linear telescopic shaft and the mounting base, it lowers the wear rate of components, helping to extend the service life of the power unit and the entire drive mechanism.

[0018] Optionally, the power unit includes a cylinder, an adapter block, and a return spring. The telescopic end of the cylinder is connected to the adapter block. One end of the linear telescopic shaft is connected to the adapter block, and the other end passes through the guide portion and is connected to the mounting head. The return spring is sleeved on the outside of the linear telescopic shaft and compressed between the adapter block and the guide portion.

[0019] In this embodiment, the cylinder indirectly drives the linear telescopic shaft via an adapter block, avoiding the rigid impact caused by direct power application and reducing the risk of shaft deformation due to excessive instantaneous force. The addition of a return spring forms a dual power protection mechanism. When the cylinder fails to retract normally due to insufficient air pressure or a sudden malfunction, the elastic potential energy stored in the return spring can independently push the blocking component down to the blocking position, ensuring the normal progress of the inspection process. Conversely, when the cylinder extends, the compression process of the spring can also help buffer the motion inertia and prevent the blocking component from moving excessively upward.

[0020] Optionally, the track plate has a through slot, the drive mechanism is installed on the side of the track plate facing away from the conveyor belt, the blocking member extends into the through slot, and the drive mechanism drives the blocking member to move horizontally, thereby switching the blocking member between the blocking state and the avoidance state.

[0021] In this embodiment, the drive mechanism is installed on the side of the track plate and connected to the blocking component via a through slot. This eliminates the need for additional space at the top or bottom of the track plate, significantly reducing the vertical height of the equipment. The blocking component achieves state switching through horizontal linear motion, reducing the impact of gravity and vertical positioning errors compared to lifting motion. The drive mechanism can directly output horizontal power without complex transmission conversion structures, resulting in a shorter stroke and faster state switching response, meeting the cycle time requirements of high-speed production lines.

[0022] Optionally, at least two of the blocking devices are provided on the track plate, and the plurality of blocking devices are symmetrically arranged along the length direction of the track plate.

[0023] In this embodiment, the symmetrically arranged blocking devices break through the limitations of traditional single-direction blocking, ensuring that the circuit board can be blocked in a timely manner and form an effective barrier whether it is flowing in the forward or reverse direction. This design greatly improves the equipment's adaptability to different production processes, eliminating the need to readjust the position of the blocking devices according to the flow direction and enhancing the equipment's versatility. Attached Figure Description

[0024] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Figure 1 This is a schematic diagram of the circuit board conveying device described in an embodiment of this application; Figure 2 for Figure 1 Enlarged view of section A in the middle; Figure 3 This is a side view of the track slab described in one of the embodiments of this application; Figure 4 This is a perspective view of the blocking device described in the embodiments of this application; Figure 5 This is a side view of the blocking device described in the embodiment of this application; Figure 6 This is a longitudinal sectional view of the blocking device described in the embodiment of this application; Figure 7 This is a schematic diagram of an explosion of the blocking device described in an embodiment of this application; Figure 8 for Figure 7 A structural diagram of a partial component at the top center; Figure 9This is a schematic diagram of the circuit board structure.

[0026] In the picture: 1. Track plate; 2. Conveyor belt; 21. Pulley; 22. Belt body; 3. Blocking device; 31. Mounting base; 311. Guide part; 3111. Guide sleeve; 32. Blocking component; 321. Connecting arm; 3211. Adjusting elongated hole; 322. Blocking head; 33. Power unit; 331. Cylinder; 332. Adapter block; 333. Linear telescopic shaft; 334. Return spring; 34. Mounting head; 341. Adjusting set screw; 342. Fastening screw; 4. Circuit board; 41. Process edge. Detailed Implementation

[0027] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] In the production and assembly process of printed circuit boards (PCBs), quality inspection is crucial, directly impacting the performance stability and reliability of the final product. To ensure the orderly conduct of inspection work, PCBs must be precisely transported to the inspection area via a board feeder track. Currently, most mainstream board feeder tracks employ belt drive, utilizing the friction between the belt and the bottom of the PCB to achieve smooth transport. This drive system is widely used in various PCB production scenarios due to its advantages such as low cost and low operating noise. To ensure the PCB is precisely positioned at the designated location on the inspection equipment and to guarantee effective inspection by the devices (such as optical inspectors and probe testers), a dedicated blocking device is typically installed in the board feed track. Its working logic is as follows: before the PCB to be inspected is conveyed to the preset inspection position by the belt, the blocking device will enter the preset blocking position in advance; when the PCB continues to move forward under the drive of the belt and comes into contact with the blocking position of the blocking device, the PCB will stop moving forward, and at this point, the PCB is precisely confined within the inspection range of the inspection equipment; after the inspection process is completed, the blocking device will retract from the blocking position, and the PCB will continue to flow forward under the continuous drive of the belt, entering the next production stage. In the design and production of circuit board 4, to avoid contact damage to components (such as chips, resistors, capacitors, etc.) on the PCB body during transportation or testing, a specific blank area, namely the board process edge 41, is usually reserved at the edge of the PCB. The board process edge 41 is generally distributed on both sides or around the edge of the board and is mainly used to assist in the production, transportation, and positioning of the PCB. For example, in the placement process, the robotic arm of the placement machine can accurately transport the PCB by gripping the process edge 41; during track transportation, the process edge 41 can directly contact the conveyor belt 2 to avoid friction or collision between the components on the PCB body and the conveyor belt 2. Therefore, the guiding of the PCB during track transportation and the blocking function of the blocking device 3 mostly need to be achieved by contacting the board process edge 41.

[0031] However, as electronic devices develop towards miniaturization, integration, and customization, a large number of irregularly shaped, non-standard geometrically sized, or specially customized printed circuit board cards (referred to as irregular PCBs) have appeared on the market. The process edge design 41 of these irregular PCBs often does not conform to conventional standards. For example, some irregular boards only have process edges 41 (i.e., track conveyor contact edges) on the left and right sides that contact the conveyor belt 2, while no process edges 41 are provided in the front and back directions; some irregular boards, although having process edges 41 on all four sides, have protruding components, boss structures, or gaps in the area above or at the edge of the process edges 41 on non-track conveyor contact surfaces (such as the front and back directions). Figure 9As shown, process edges 41 are reserved on the left and right sides of the circuit board 4, but not on the front and back sides, and there are irregular structures with gaps on the front and back sides.

[0032] Currently, the blocking structures commonly used for positioning circuit boards are relatively simple in design. Their blocking logic typically involves blocking the forward end of the circuit board (directly blocking the process edge 41 of the PCB's non-track conveying contact surface) to achieve positioning. However, for the aforementioned irregular PCB boards, the process edge 41 of the non-track conveying contact surface may have various irregularities, making it difficult for traditional blocking structures to adapt. This compatibility issue is particularly prominent in production scenarios that require handling multiple types of irregular boards. For example, when the process edge 41 of the PCB's non-track conveying contact surface has protruding components or gaps, the PCB will not be able to stop at the accurate detection position as preset, ultimately affecting detection accuracy and even causing detection errors or equipment malfunctions. Furthermore, since the size, position, height, and shape of gaps, as well as protrusions, may vary significantly among different irregular PCB boards, when these different models of PCB boards are positioned using the same blocking structure, the actual contact point between the block and the process edge 41 will deviate due to the different irregular characteristics. This will directly result in different final positions for different PCB boards. Therefore, the existing blocking structure still has the problem of being unable to meet the precise positioning requirements of various PCB models, and it is difficult to meet the requirements for PCB positioning consistency and accuracy in diverse production scenarios.

[0033] Reference Figures 1-3 To overcome the above technical problems, this application provides a circuit board conveying device, including: The track slab 1 includes two parallel track slabs; each of the two track slabs 1 has a conveyor belt 2 on its opposite side. The blocking device 3 includes a driving mechanism and a blocking member 32. The blocking member 32 is connected to the driving mechanism, and the driving mechanism drives the blocking member 32 to switch between a blocking state and a avoiding state. In the blocking state, the blocking member 32 approaches or abuts the upper surface of the conveyor belt 2 to block the circuit board 4 conveyed on the conveyor belt 2. In the avoiding state, the blocking member 32 moves away from the conveyor belt 2 to avoid the circuit board 4. At least one of the track plates 1 is equipped with the blocking device 3.

[0034] In this embodiment, the track plate 1 adopts a parallel double-track structure, with conveyor belts 2 installed on opposite sides of the two track plates 1. This structure continues the basic framework of traditional circuit board conveying equipment, providing stable support and a conveying path for the circuit board 4 through the symmetrical design of the double tracks. The conveyor belt 2 serves as a power transmission carrier, using friction with the bottom of the circuit board 4 to achieve forward transport. The conveyor belt 2 includes multiple pulleys 21 and a belt body 22 sleeved on the pulleys 21. During transport, the process edges 41 on the left and right sides of the circuit board 4 respectively contact the upper surface of the belt body 22.

[0035] The blocking device 3 includes a drive mechanism and a blocking component 32. The drive mechanism switches between two states: in the blocking state, the blocking component 32 approaches or abuts the upper surface of the conveyor belt 2; in the avoiding state, the blocking component 32 moves away from the surface of the conveyor belt 2. It is worth noting that the installation position of the blocking device 3 is flexible; it can be installed on at least one track plate 1 to meet basic blocking requirements. In practical applications, single-track installation or symmetrical installation on two tracks can be selected according to the scenario requirements.

[0036] In this embodiment, during the process of conveying the circuit board 4 by the circuit board conveying equipment, before the circuit board 4 is conveyed to the preset detection position by the conveyor belt 2, the drive mechanism drives the blocking member 32 to switch from the avoidance state to the blocking state. At this time, the blocking member 32 approaches or abuts the upper surface of the conveyor belt 2, forming a physical barrier. Since the left and right sides of the circuit board 4 are provided with track conveying contact edges (i.e., fixed-shape process edges 41) that contact the conveyor belt 2, and these process edges 41 have no protrusions, notches, or other irregular structures, when the circuit board 4 moves forward with the conveyor belt 2, its track conveying contact edges will directly abut against the blocking member 32. Under the blocking action of the blocking member 32, the circuit board 4 stops moving forward and is thus precisely limited to the detection position. After the detection process is completed, the drive mechanism drives the blocking member 32 to switch from the blocking state to the avoidance state. The blocking member 32 moves away from the surface of the conveyor belt 2, releasing the obstruction of the circuit board 4. The circuit board 4 then continues to be conveyed forward under the continuous drive of the conveyor belt 2, entering the next production stage.

[0037] In summary, the conveying device in this embodiment achieves blocking by having the blocking member 32 directly contact the track conveying contact edges on both sides of the circuit board 4. Since the track conveying contact edges are fixed-shape process edges 41 without protrusions, notches, or other irregular structures, they can form a stable and reliable contact with the blocking member 32. This effectively avoids the positioning deviation problem caused by contact with irregular process edges 41 in traditional blocking structures, ensuring that the circuit board 4 can accurately stop at the detection position. For different models of irregularly shaped PCB boards, the structure of their track conveying contact edges is usually standardized and unaffected by irregular features in other areas. Therefore, the same blocking device 3 can be adapted to multiple models of circuit boards 4, eliminating the need for frequent adjustments to the blocking structure based on the board model, significantly improving the equipment's adaptability to diverse production scenarios. The blocking member 32 only contacts the track conveying contact edges where no components are distributed, avoiding collisions with protruding components on the main body of the circuit board 4 or the non-track contact surface process edges 41, reducing the risk of component damage and ensuring the production quality of the circuit board 4. In one embodiment, the driving mechanism drives the blocking member 32 to rotate or move up and down, thereby switching the blocking member 32 between the blocking state and the avoidance state.

[0038] In one rotary drive configuration, the drive mechanism may consist of a rotary motor coupled with a linkage or gear structure, allowing the blocking component 32 to rotate around a fixed axis. In this configuration, when in the avoidance state, the blocking component 32 may be in a retracted position parallel to or inclined to the surface of the conveyor belt 2, with its end used to block the circuit board 4 moving upwards away from the upper surface of the conveyor belt 2. When switching to the blocking state, it rotates to a blocking position perpendicular to or at a certain angle to the surface of the conveyor belt 2, causing its end used to block the circuit board 4 to move downwards towards or contact the upper surface of the conveyor belt 2. This rotary drive method is more suitable for space-constrained scenarios, as the rotating retraction of the blocking component 32 reduces its impact on the space surrounding the track.

[0039] If a lifting drive method is adopted, the drive mechanism can be a cylinder 331, a linear motor, or a lead screw slide, etc., and the blocking member 32 moves up and down in a direction perpendicular to the surface of the conveyor belt 2. In the lifting drive scheme, when in the avoidance state, the blocking member 32 is located at a high position above the conveyor belt 2 and does not affect the conveying of the circuit board 4; when blocking is required, the drive mechanism drives the blocking member 32 to move downward in the vertical direction until it approaches or abuts the upper surface of the conveyor belt 2, forming a block. After the circuit board 4 is positioned and detected, the drive mechanism drives the blocking member 32 to rise to a high position, away from the surface of the conveyor belt 2 to avoid the circuit board 4, and the circuit board 4 continues to move forward under the drive of the conveyor belt 2. In this lifting drive method, the blocking member 32 is always located above the conveyor belt 2, and it is easier to adapt to circuit boards 4 of different thicknesses or track conveying contact edges of different heights by adjusting the lifting stroke. In this embodiment, the rotational or lifting motions used are mature forms of mechanical transmission, with simple structures and high transmission efficiency. The drive mechanism, by precisely controlling the rotation angle or lifting height, ensures the positional accuracy of the blocking component 32 when switching between the two states, avoiding blocking failures caused by motion jamming or offset, and further ensuring the stability of the circuit board 4's positioning. The drive mechanism's control of the rotation or lifting of the blocking component 32 can be quickly triggered by electrical signals, with rapid state switching response, meeting the requirements of the circuit board 4's conveying rhythm in high-speed production lines. Simultaneously, the mechanical structures of both motion forms are easy to maintain, and the equipment performance can be optimized and the operational difficulty reduced by adjusting drive parameters (such as rotational speed and lifting rate).

[0040] In one embodiment, combined with Figure 3 and Figure 5 The blocking member 32 includes a connecting arm 321 and a blocking head 322 connected at an angle to each other. The connecting arm 321 is connected to the driving mechanism. In the blocking state, the blocking head 322 extends from top to bottom relative to the connecting arm 321 to approach or abut against the upper surface of the conveyor belt 2, thereby blocking the circuit board 4.

[0041] In this embodiment, the blocking component 32 includes a connecting arm 321 and a blocking head 322 (which can be an integral connection structure or an assembled structure) connected at an angle to each other. The connecting arm 321 serves as a power transmission carrier and is directly connected to the drive mechanism, bearing the power output of the drive mechanism. The blocking head 322 serves as an actuating component, extending downwards relative to the connecting arm 321 in the blocking state, eventually approaching or abutting the upper surface of the conveyor belt 2, and achieving the blocking function by contacting the track conveying contact edge of the circuit board 4. The angle between the connecting arm 321 and the blocking head 322 needs to be determined according to the equipment space layout and blocking requirements to ensure that the blocking head 322 can accurately act on the target position on the surface of the conveyor belt 2 in the working state.

[0042] In this embodiment, the connecting arm 321 and the blocking head 322 adopt a bending and turning structure at an angle to each other, which fully adapts to the space restriction that the blocking component 32 can only move in the area above the circuit board 4. This design ensures that the drive mechanism can drive the blocking component 32 to rotate or rise normally, while the downward extension of the blocking head 322 shortens the longitudinal height of the entire blocking device 3. This avoids the problem of excessive overall height caused by the drive mechanism directly driving the linear component, making the entire blocking device 3 structure more compact and saving the longitudinal space of the equipment. It is especially suitable for production scenarios where the installation height is limited.

[0043] Taking a lifting drive mechanism as an example: To avoid interfering with the movement of the circuit board 4, the drive device can only be installed on the outside (i.e., the side facing away from the conveyor belt 2) or the top side of the track plate 1. The telescopic end of the drive mechanism is set upwards. When a bent blocking member 32 is used, one end of the connecting arm 321 is connected to the telescopic end of the drive mechanism and extends horizontally to the area above the conveyor belt 2. The blocking head 322 is connected to the end of the connecting arm 321 away from the drive mechanism and extends downwards, so that when the drive mechanism descends, the blocking head 322 can descend to the position where it effectively blocks the circuit board 4. In this structure, the blocking head 322 and the drive device are essentially overlapped in horizontal height, thus reducing the overall height of the drive device and improving compactness.

[0044] In one embodiment, the drive mechanism is mounted on the top of the track plate 1 or on the side of the track plate 1 facing away from the conveyor belt 2.

[0045] Regardless of whether the drive mechanism is installed on the top or the side, it is connected to the blocking head 322 via the connecting arm 321. When installed on the top, the connecting arm 321 can extend horizontally or obliquely above the conveyor belt 2 and then connect to the downward-extending blocking head 322; when installed on the side, the connecting arm 321 extends horizontally above the conveyor belt 2 and then connects to the blocking head 322, forming a bent transmission path of "drive mechanism - connecting arm 321 - blocking head 322", ensuring that the blocking head 322 can accurately act on the blocking position on the surface of the conveyor belt 2.

[0046] In this embodiment, the drive mechanism is installed on the top of the track plate 1 or on the side facing away from the conveyor belt 2, away from the conveyor belt 2 and the conveying channel of the circuit board 4. From the spatial layout, the possibility of mechanical interference between the drive mechanism and the circuit board 4 and the conveyor belt 2 is completely eliminated, avoiding equipment failure or damage to the circuit board 4 due to structural collision, and ensuring the safety and stability of equipment operation.

[0047] Preferably, the drive mechanism is installed on the side of the track plate 1 facing away from the conveyor belt 2. This can prevent the drive mechanism from protruding too high relative to the track plate 1, and at the same time, it is more conducive to increasing the connection area between the drive mechanism and the track plate 1, thereby improving its stability.

[0048] In one embodiment, reference is made to Figure 3 and Figure 5 The drive mechanism includes a power unit 33 and a mounting head 34. The mounting head 34 is mounted on the output end of the power unit 33, and the blocking member 32 is mounted on the mounting head 34. The mounting head 34 is equipped with an adjustable adjusting screw 341, which is used to limit the movement of the mounting head 34, thereby limiting the vertical distance between the blocking member 32 and the conveyor belt 2 in the blocking state.

[0049] The drive mechanism includes a power unit 33 and a mounting head 34. The power unit 33 is the drive source (such as a cylinder 331, linear motor, rotary motor, etc.), and the mounting head 34 is fixed to the output end of the power unit 33, undertaking the functions of power transmission and component connection. The blocking member 32 is connected to the drive mechanism through the mounting head 34, so that the output force of the power unit 33 can be transmitted to the blocking member 32 through the mounting head 34, driving it to achieve lifting or rotational movement.

[0050] An adjustable adjusting screw 341 is installed on the mounting head 34. This adjusting screw 341 is parallel to the direction of movement of the mounting head 34 (e.g., vertically). By rotating the adjusting screw 341, its length extending out of the mounting head 34 can be changed, thereby adjusting the relative distance between the adjusting screw and the fixed parts of the equipment (e.g., the track plate 1 or the base of the drive mechanism), thus forming a mechanical limit on the travel of the mounting head 34. Regardless of whether the drive mechanism is installed on the top or side of the track plate 1, the adjusting screw 341 is integrated into the mounting head 34. Its limiting function directly acts on the end point of the movement of the mounting head 34 (i.e., the position when the blocking member 32 reaches the blocking state), ensuring that the vertical distance between the blocking head 322 and the conveyor belt 2 meets the preset requirements.

[0051] Based on this adjustable structural design, when the equipment is not in operation or needs to accommodate circuit boards 4 of different thicknesses, the operator can adjust its height by rotating the adjusting screw 341: the longer the screw extends, the smaller the distance between it and the fixed component, and the shorter the maximum downward stroke of the mounting head 34; the shorter the screw extends, the longer the maximum stroke of the mounting head 34. During operation, when the drive mechanism receives a blocking signal and drives the mounting head 34 to move downward, the mounting head 34 will drive the blocking component 32 to descend synchronously until the adjusting screw 341 contacts the fixed component of the equipment (or the screw is blocked by the fixed component). At this time, the mounting head 34 stops moving, and the blocking component 32 reaches the preset blocking state. Since the height of the adjusting screw 341 has been pre-calibrated, the vertical distance between the blocking head 322 and the conveyor belt 2 is precisely limited, so that the distance is neither too large, resulting in ineffective blocking, nor too small, causing compression of the conveyor belt 2 or circuit board 4.

[0052] In this embodiment, the adjusting screw 341 directly limits the maximum travel of the mounting head 34 through mechanical limiting, ensuring a stable vertical distance between the blocking component 32 and the conveyor belt 2 in the blocking state. This avoids inconsistencies in spacing caused by output errors of the power unit 33 (such as air pressure fluctuations in the cylinder 331 or motor speed deviations), ensuring that the blocking effect on circuit boards 4 of different thicknesses meets the requirements. The blocking distance can be quickly adjusted by adjusting the adjusting screw 341, allowing the equipment to adapt to circuit boards 4 of different thicknesses or different types of conveyor belts 2 (such as belts of different thicknesses) without replacing the blocking component 32 or adjusting the drive mechanism parameters. This significantly improves the equipment's adaptability to diverse production needs and reduces the time cost of changeover and debugging.

[0053] Furthermore, the height adjustment of the adjusting screw 341 requires no specialized tools or complex programming; operators can complete the calibration simply by rotating it, significantly simplifying the equipment installation and commissioning process. Especially in multi-variety, small-batch production scenarios, it can quickly switch between different circuit board models 4, reducing the skill requirements for operators. The reliability of mechanical limiters is far superior to the stroke limits of purely electronic controls. The adjusting screw 341 effectively prevents the mounting head 34 from colliding with the conveyor belt 2 or track plate 1 due to uncontrolled excessive descent, avoiding wear or damage to equipment components, extending the equipment's lifespan, and reducing maintenance frequency.

[0054] Optionally, a threaded hole is provided on the mounting head 34, and the adjusting screw 341 is threaded into the threaded hole. By rotating the adjusting screw 341, its length protruding relative to the mounting head 34 can be adjusted, thereby realizing the height adjustment function.

[0055] In one embodiment, combined with Figure 5 and Figure 6 The drive mechanism includes a power unit 33 and a mounting head 34. The mounting head 34 is mounted on the output end of the power unit 33. The blocking member 32 is mounted on the mounting head 34. The blocking member 32 is telescopically connected to the mounting head 34, and its telescopic direction extends horizontally.

[0056] The blocking component 32 is installed on the mounting head 34, and the two can extend and retract relative to each other in the horizontal direction. That is, the connection structure of the two is designed to be horizontally adjustable. Specifically, this can be achieved by setting a horizontal elongated mounting hole, a sliding groove and a slider in the mounting head 34. The blocking component 32 can move on the mounting head 34 in the horizontal direction and be fixed by bolts or other fasteners after being adjusted to a suitable position.

[0057] When the equipment needs to be adapted to circuit boards 4 with different widths or different track conveying contact edge positions, the operator can loosen the fixing fasteners of the blocking member 32 and the mounting head 34, move the blocking member 32 along the horizontal adjustment structure of the mounting head 34, adjust the blocking head 322 to the horizontal position corresponding to the track conveying contact edge of the circuit board 4, and then fix the blocking member 32 again.

[0058] In this embodiment, the adjustable horizontal position of the blocking component 32 ensures that the blocking head 322 can be accurately aligned with the track conveying contact edge of the circuit board 4, avoiding blocking failure caused by horizontal position deviation. Dual control further improves the accuracy of blocking. In use, by adjusting the horizontal position of the blocking component 32, it can accommodate circuit boards 4 of different widths or with different track conveying contact edge positions without requiring replacement of the blocking component 32 or large-scale equipment modifications. This significantly improves the equipment's adaptability to diverse production needs and reduces the time cost of changeover and debugging. In one embodiment, reference is made to Figure 8 The blocking member 32 is provided with an adjustment elongated hole 3211, and the mounting head 34 is provided with a corresponding threaded hole. The fastening screw 342 passes through the adjustment elongated hole 3211 and connects to the threaded hole. By loosening the fastening screw 342, the position of the blocking member 32 can be adjusted horizontally by adjusting the elongated hole 3211; tightening the fastening screw 342 can lock the blocking member 32.

[0059] The adjustment structure of this embodiment has the advantages of simple structure, simple adjustment operation, and good fastening reliability.

[0060] Regarding the telescopic connection method of the blocking component to the mounting head, the following forms may also be adopted, but are not limited to: Slide rail snap-on quick adjustment: A slide rail is installed on the mounting head, and the blocking component includes a slider and a spring-loaded snap-on mechanism. The snap-on mechanism is connected to the slider via a spring. The slider slides along the slide rail, and the snap-on mechanism automatically engages in the slot under the action of the spring, achieving discrete position positioning. When adjustment is needed, press the snap-on mechanism to disengage it from the slot, slide it to the target position, and release it. The snap-on mechanism will automatically reset and lock.

[0061] Rack and pinion meshing structure: A straight rack is fixed horizontally on the mounting head, and a small gear is integrated at the bottom of the blocking component and meshes with the rack. The adjusting knob is connected to the small gear. The blocking component also has a locking handle that engages with the straight rack for locking. When adjustment is needed, open the locking handle (disengage from the rack and unlock); rotate the adjusting knob, and the gear will drive the blocking component to move horizontally along the rack; once in position, open the locking handle to engage the straight rack and lock it in place.

[0062] Linear guide rail + set screw structure: The mounting head is horizontally mounted on the linear guide rail; the blocking component: the bottom of the guide rail slider is fixed, and the side is provided with a set screw hole; when adjustment is required, loosen the set screw and manually push the blocking component; after it is in place, tighten the set screw, and the front end of the screw presses against the side of the guide rail, locking the slider position through pressure.

[0063] In one embodiment, the drive mechanism includes a mounting base 31, a power unit 33, and a mounting head 34. The mounting base 31 is mounted on the track plate 1, and the power unit 33 is mounted on the mounting base 31.

[0064] The mounting base 31 serves as the connection base and is directly installed and fixed to the track plate 1 (it can be installed on the top of the track plate 1 or on the side facing away from the conveyor belt 2); the power unit 33 (such as cylinder 331, linear motor, etc.) is installed on the mounting base 31, and is indirectly fixed to the track plate 1 through the mounting base 31; the mounting head 34 is installed at the output end of the power unit 33, and undertakes the functions of connecting the blocking member 32 and transmitting power. The blocking member 32 (including the connecting arm 321, the blocking head 322 and the adjusting elongated hole 3211) is connected to the mounting head 34 through the fastening screw 342, and its horizontal position is adjustable. The structural design of the mounting base 31 must match the shape and installation position of the track plate 1. For example, a flat plate structure can be used when installing on the top, and an L-shaped bracket structure can be used when installing on the side. The mounting base 31 is provided with fixing holes for connecting to the track plate 1 and mounting holes for matching the power unit 33, ensuring that the power unit 33 can be stably assembled, while reserving sufficient movement space for the power unit 33 to avoid interference with the track plate 1 or the conveyor belt 2. The mounting base 31 is preferably installed by using bolts or other fasteners to rigidly connect to the track plate 1, so as to facilitate adjustment of the installation position as needed, while also having the advantage of good installation reliability.

[0065] In this embodiment, the mounting base 31, as an independent connecting component, increases the contact area between the drive mechanism and the track plate 1, and enhances the rigidity of the overall structure through multi-point fixing. Compared to the method of directly mounting the power unit 33 onto the track plate 1, the mounting base 31 can effectively disperse the vibration and impact force generated by the power unit 33 during operation, reduce the problem of loosening of the connection due to long-term operation, ensure stable power output, and improve the consistency of blocking positioning. The mounting base 31 can effectively limit the displacement range of the power unit 33, avoid the power unit 33 from falling off or shifting due to accidental collisions or vibrations, and reduce safety hazards during equipment operation.

[0066] In one embodiment, the power unit 33 includes a linear telescopic shaft 333, and the mounting base 31 is provided with a guide portion 311. The linear telescopic shaft 333 passes through the guide portion 311 and is connected to the mounting head 34, and the linear reciprocating motion of the linear telescopic shaft 333 is guided by the guide portion 311.

[0067] When the device receives a blocking signal, the power unit 33 outputs power under the fixed support of the mounting base 31, driving the linear telescopic shaft 333 to perform a linear descent motion. At this time, under the constraint of the guide part 311 of the mounting base 31, the linear telescopic shaft 333 moves stably along the preset linear trajectory to avoid deviation or shaking, thereby driving the mounting head 34 and the blocking part 32 to accurately complete the lifting and lowering motion.

[0068] In this embodiment, the guide portion 311 provides precise motion constraints for the linear telescopic shaft 333, ensuring that it maintains a preset trajectory during long-term, high-frequency reciprocating motion and reducing positional deviations of the mounting head 34 and the blocking member 32 caused by shaft wobbling. This design effectively improves the accuracy of the blocking member 32's state switching, making the blocking head 322 more stable in vertical movement and further ensuring the consistency of the circuit board 4's positioning. Simultaneously, because the guide portion 311 reduces friction and collision between the linear telescopic shaft 333 and the mounting base 31, it lowers the wear rate of components, helping to extend the service life of the power unit 33 and the entire drive mechanism.

[0069] In one implementation, the guide part 311 is equipped with a guide sleeve 3111, and the linear telescopic shaft 333 passes through the guide sleeve 3111.

[0070] Among them, the guide sleeve 3111 is made of wear-resistant material, which can directly bear the friction of the linear telescopic shaft 333, avoid wear on the mounting base 31 body, and at the same time, its smooth surface can reduce the coefficient of friction, reduce the wear of the linear telescopic shaft 333 and the internal components of the power unit 33, and significantly extend the service life of the power unit 33 and the entire drive mechanism.

[0071] In one embodiment, the power unit 33 includes a cylinder 331, an adapter block 332, and a return spring 334. The telescopic end of the cylinder 331 is connected to the adapter block 332. One end of the linear telescopic shaft 333 is connected to the adapter block 332, and the other end passes through the guide portion 311 and is connected to the mounting head 34. The return spring 334 is sleeved on the linear telescopic shaft 333 and compressed between the adapter block 332 and the guide portion 311.

[0072] In the specific structure, cylinder 331 serves as the main power source. It switches the direction of movement by extending and retracting its telescopic end. When it is necessary to avoid circuit board 4, the telescopic end of cylinder 331 extends and transmits the thrust to linear telescopic shaft 333 through adapter block 332. This drives linear telescopic shaft 333 to move upward along guide sleeve 3111, thereby causing mounting head 34 and blocking member 32 to move upward synchronously, making room for the transport of circuit board 4. When it is necessary to enter the blocking state, the telescopic end of cylinder 331 retracts, actively canceling the thrust and creating conditions for the function of return spring 334. The adapter block 332 connects the telescopic end of the cylinder 331 to the linear telescopic shaft 333, forming an intermediate transition structure. Its functions are twofold: first, to smoothly transmit the linear power of the cylinder 331 to the linear telescopic shaft 333, avoiding impact deformation caused by direct power acting on the shaft; and second, to provide a stable force support point for the return spring 334, ensuring uniform force distribution during compression and release, and reducing local stress concentration. Preferably, based on the adapter block 332, two linear telescopic shafts 333 can be arranged in parallel to further improve the stability of lifting and lowering. The return spring 334 is sleeved outside the linear telescopic shaft 333 and is always in a compressed state. When the cylinder 331 extends and pushes the adapter block 332 upward, the spring is further compressed and stores elastic potential energy. When the cylinder 331 retracts, the spring releases its elastic potential energy, generating a downward thrust to push the adapter block 332, the linear telescopic shaft 333, and the blocking component 32 downward, achieving precise switching of the blocking state. This elastic force complements the power of the cylinder 331, ensuring the continuity and stability of the movement process.

[0073] When it is necessary to avoid an obstacle, the telescopic end of cylinder 331 extends, pushing the adapter block 332 upward. The adapter block 332 drives the linear telescopic shaft 333 to move upward along the guide sleeve 3111. At this time, the return spring 334 is further compressed to store elastic potential energy. The linear telescopic shaft 333 drives the mounting head 34 and the blocking member 32 upward, allowing the circuit board 4 to pass smoothly. When it is necessary to enter the blocking state, the telescopic end of cylinder 331 retracts, the adapter block 332 loses its thrust, the return spring 334 releases its elastic potential energy, pushing the adapter block 332 down, and driving the linear telescopic shaft 333, the mounting head 34 and the blocking member 32 down to enter the blocking position that blocks the circuit board 4.

[0074] In this embodiment, the cylinder 331 indirectly drives the linear telescopic shaft 333 through the adapter block 332, avoiding the rigid impact caused by direct power application and reducing the risk of deformation of the shaft due to excessive instantaneous force. The addition of the return spring 334 forms a dual power protection mechanism. When the cylinder 331 fails to retract normally due to insufficient air pressure or a sudden malfunction, the elastic potential energy stored in the return spring 334 can independently push the blocking member 32 down to the blocking position, ensuring the normal progress of the inspection process. Conversely, when the cylinder 331 extends, the compression process of the spring can also help buffer the motion inertia and prevent the blocking member 32 from moving excessively upward.

[0075] In one embodiment, a through groove is provided on the track plate 1, the drive mechanism is installed on the side of the track plate 1 facing away from the conveyor belt 2, the blocking member 32 extends into the through groove, and the drive mechanism drives the blocking member 32 to move horizontally, thereby switching the blocking member 32 between the blocking state and the avoidance state.

[0076] Unlike the aforementioned rotational and lifting movements, the blocking member 32 in this embodiment moves horizontally. Specifically, a through slot is formed on the track plate 1, positioned laterally (perpendicular to the conveyor belt 2's transport direction) and corresponding to the side area of ​​the conveyor belt 2. This provides a channel for the blocking member 32's movement. The length and width of the through slot must match the size and range of motion of the blocking member 32 to ensure that it can move flexibly within the slot without interfering with the track plate 1. The drive mechanism is installed on the side of the track plate 1 facing away from the conveyor belt 2 (i.e., the outer side of the track plate 1), corresponding to the outer port of the through slot. This installation method allows the drive mechanism to completely avoid the transport area of ​​the conveyor belt 2, preventing obstruction of the circuit board 4's transport path. One end of the blocking member 32 is connected to the output end of the drive mechanism, and the other end extends through the through slot to the area above the conveyor belt 2 inside the track plate 1. The blocking member 32 is driven by the drive mechanism to achieve horizontal reciprocating motion (along the length of the through slot), thereby switching between blocking and avoidance states.

[0077] During operation, when circuit board 4 is about to reach the detection position, the equipment needs to enter a blocking state: after receiving a signal, the drive mechanism (such as cylinder 331, linear motor, etc.) drives the blocking component 32 to move horizontally. The blocking component 32 extends through the through groove to the area above the conveyor belt 2, with its end protruding from the surface of the conveyor belt 2, forming a block on the track conveying contact edge of circuit board 4. When circuit board 4 moves to this position with conveyor belt 2, the track conveying contact edge abuts against the blocking component 32, thereby stopping the movement and accurately positioning it at the detection position. When the detection is completed and avoidance is required, the drive mechanism drives the blocking component 32 to retract horizontally. The blocking component 32 retracts from the area above the conveyor belt 2 into the through groove or outside the track plate 1, completely detaching from the conveying path of conveyor belt 2. At this time, circuit board 4 can continue to be conveyed forward under the drive of conveyor belt 2, realizing the switching of the avoidance state. Throughout the process, the blocking component 32 always moves horizontally, forming a structural fit with the track plate 1 through the through groove.

[0078] In this embodiment, the drive mechanism is installed on the side of the track plate 1 and connected to the blocking member 32 through a through slot. This eliminates the need for additional space at the top or bottom of the track plate 1, significantly reducing the longitudinal height of the equipment. The blocking member 32 achieves state switching through horizontal linear motion, reducing the impact of gravity and vertical positioning errors compared to lifting motion. The drive mechanism can directly output horizontal power without complex transmission conversion structures, resulting in a shorter stroke and faster state switching response, meeting the cycle time requirements of high-speed production lines.

[0079] However, compared to this horizontal drive method, the lifting drive or rotation drive methods provided above do not require opening through slots on the track plate 1 to provide clearance for the blocking member 32. Therefore, they are easier to directly apply to the existing track plate 1, and there is no need to worry about opening through slots damaging the structural strength of the track plate 1.

[0080] In one embodiment, at least two blocking devices 3 are provided on the track plate 1, and the plurality of blocking devices 3 are symmetrically arranged along the length direction of the track plate 1.

[0081] At least two blocking devices 3 are provided on the track plate 1. These blocking devices 3 are symmetrically distributed along the length direction of the track plate 1 (i.e. the conveying direction of the conveyor belt 2). The symmetrical arrangement means that blocking devices 3 with the same function are installed at different positions on the track plate 1, such as near the front and rear ends. Their installation positions on the track plate 1 are symmetrical about a certain central axis, ensuring that the circuit boards 4 in different flow directions can be effectively blocked.

[0082] In this embodiment, the symmetrically arranged blocking devices 3 break through the limitations of traditional single-direction blocking, so that the circuit board 4 can be effectively blocked in a timely manner by the corresponding blocking devices 3, whether it is flowing in the forward or reverse direction. This design greatly improves the equipment's adaptability to different production processes, and there is no need to readjust the position of the blocking devices 3 according to the flow direction, thus enhancing the equipment's versatility.

[0083] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0084] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0085] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0086] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A circuit board conveying device, characterized in that, include: The track slab (1) includes two parallel tracks; each of the two track slabs (1) has a conveyor belt (2) on its opposite side; The blocking device (3) includes a driving mechanism and a blocking member (32). The blocking member (32) is connected to the driving mechanism and is driven by the driving mechanism to switch between a blocking state and a avoidance state. In the blocking state, the blocking member (32) approaches or abuts the upper surface of the conveyor belt (2) to block the circuit board (4) being transported on the conveyor belt (2). In the avoidance state, the blocking member (32) moves away from the conveyor belt (2) to avoid the circuit board (4). The blocking device (3) is installed on at least one of the track plates (1).

2. The circuit board conveying device according to claim 1, characterized in that, The driving mechanism drives the blocking member (32) to rotate or move up and down, thereby switching the blocking member (32) between the blocking state and the avoidance state.

3. The circuit board conveying device according to claim 2, characterized in that, The blocking member (32) includes a connecting arm (321) and a blocking head (322) connected at an angle to each other. The connecting arm (321) is connected to the driving mechanism. In the blocking state, the blocking head (322) extends from top to bottom relative to the connecting arm (321) to approach or abut against the upper surface of the conveyor belt (2) and blocks the circuit board (4) through the blocking head (322).

4. The circuit board conveying device according to claim 1, characterized in that, The drive mechanism is installed on the top of the track plate (1) or on the side of the track plate (1) facing away from the conveyor belt (2).

5. The circuit board conveying device according to claim 1, characterized in that, The drive mechanism includes a power unit (33) and a mounting head (34), the mounting head (34) is mounted on the output end of the power unit (33), and the blocking member (32) is mounted on the mounting head (34); The mounting head (34) is equipped with an adjustable adjusting screw (341) for limiting the travel of the mounting head (34).

6. The circuit board conveying device according to claim 1, characterized in that, The drive mechanism includes a power unit (33) and a mounting head (34). The mounting head (34) is mounted on the output end of the power unit (33). The blocking member (32) is mounted on the mounting head (34). The blocking member (32) is telescopically connected to the mounting head (34), and its telescopic direction extends horizontally.

7. The circuit board conveying device according to claim 1, characterized in that, The drive mechanism includes a mounting base (31), a power unit (33), and a mounting head (34). The mounting base (31) is mounted on the track plate (1), and the power unit (33) is mounted on the mounting base (31).

8. The circuit board conveying device according to claim 7, characterized in that, The power unit (33) includes a linear telescopic shaft (333), and the mounting base (31) is provided with a guide part (311). The linear telescopic shaft (333) passes through the guide part (311) and is connected to the mounting head (34). The linear reciprocating motion of the linear telescopic shaft (333) is guided by the guide part (311).

9. The circuit board conveying device according to claim 8, characterized in that, The power unit (33) includes a cylinder (331), an adapter block (332), and a return spring (334). The telescopic end of the cylinder (331) is connected to the adapter block (332). One end of the linear telescopic shaft (333) is connected to the adapter block (332), and the other end passes through the guide part (311) and is connected to the mounting head (34). The return spring (334) is sleeved on the linear telescopic shaft (333) and compressed between the adapter block (332) and the guide part (311).

10. The circuit board conveying device according to claim 1, characterized in that, The track plate (1) has a through groove. The drive mechanism is installed on the side of the track plate (1) facing away from the conveyor belt (2). The blocking member (32) extends into the through groove. The drive mechanism drives the blocking member (32) to move horizontally, thereby switching the blocking member (32) between the blocking state and the avoidance state.

11. The circuit board conveying device according to claim 1, characterized in that, At least two blocking devices (3) are provided on the track plate (1), and multiple blocking devices (3) are symmetrically arranged along the length direction of the track plate (1).

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