Board turning and conveying equipment for circuit board

Abstract

The invention discloses board turning and conveying equipment for a circuit board. According to the technical scheme, the device comprises a conveying assembly capable of rotating around the geometric center of the conveying assembly, the conveying assembly is provided with a conveying channel used for driving plates to move, and a blocking component is arranged on one side of the conveying channel; the blocking part comprises a blocking piece connected with the conveying assembly and a guide rail with the two ends provided with a limiting bent groove in advance respectively, and any limiting bent groove is connected with the blocking piece in a sliding and clamping mode. The device has the technical effects that the blocking piece and the guide rail are arranged, no elastic piece is needed, and the reliability hidden danger that in the prior art, an elastic piece is used for working, and the elastic piece loses efficacy due to fatigue is avoided.

Description

Technical Field

[0001] This invention relates to the field of sheet metal conveying and flipping equipment, and more particularly to a sheet metal conveying and flipping equipment for circuit boards. Background Technology

[0002] PCB board flipping machines are specialized equipment in electronic manufacturing production lines. They are mainly used to automatically flip double-sided PCB boards (printed circuit boards) or PCBAs (board assemblies with components mounted) 180 degrees to meet double-sided processing requirements. However, during the operation of the flipping device, the PCB board will slide off the conveyor channel under the influence of gravity. To solve this problem, existing technologies use active clamping flip-plate equipment, which uses pneumatic / electric grippers to fix the plates. However, the connecting parts such as air pipes and cables required for driving need to rotate with the equipment. Under high-frequency reciprocating motion, the connecting parts are prone to wear and breakage due to torsional fatigue, leading to clamping failure and equipment shutdown. Another type of elastic blocking flip-board device uses springs / torsion springs to drive blocking plates to constrain the board. However, the elastic elements are prone to elastic fatigue under long-term high-frequency operation, resulting in the reduction of elastic force, inaccurate reset of the blocking plates or unstable positioning, causing the PCB board to slip or be scratched. Summary of the Invention

[0003] The purpose of this invention is to provide a flip-board conveying device for circuit boards, so as to solve the problem that the prior art cannot reliably and effectively limit and block rotating PCB boards.

[0004] To achieve this objective, the present invention adopts the following technical solution: a flip-board conveying device for circuit boards, comprising a conveying component capable of rotating around its own geometric center, the conveying component being provided with a transmission channel for moving the board, and a blocking component being provided on one side of the transmission channel; The barrier component includes a barrier member connected to the conveying assembly, and a guide rail with a limiting groove at each end, wherein any limiting groove is slidably engaged with the barrier member. During operation, the conveying component rotates, causing the barrier to disengage from the limiting bend. When the barrier is squeezed by the guide rail, it rotates toward the transmission channel and protrudes out of the transmission channel.

[0005] Compared with the prior art, the present invention has the following advantages: the triggering and constraint of the entire blocking and resetting action of the blocking component of this device is achieved by the physical limiting and squeezing of the blocking component by the geometry of the guide rail, without the need to use any elastic components, thus avoiding the reliability risks of existing technologies that use elastic components and fail due to fatigue. Furthermore, the entire working process of this device does not require any additional pneumatic or electric drive devices for the barrier components, fundamentally avoiding the problem of twisting, wear, and breakage of the connecting parts caused by the rotation of the conveying components; Furthermore, there is no need to set up separate electrical control logic, sensors, or drive units for the barrier components and guide rails, which greatly simplifies the device structure and reduces manufacturing costs and maintenance complexity. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0007] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0008] Figure 1 This is a schematic diagram of a flip-board conveyor system used for circuit boards. Figure 2 This is a partial structural diagram of a flip-board conveyor for circuit boards. Figure 3 A schematic diagram of the guide rail 21 for a circuit board flipping conveyor; Figure 4 A schematic diagram of the barrier 22 and guide rail 21 used in a circuit board flipping conveyor. Figure 5 Diagram showing the working state of barrier 22 used in a circuit board flipping conveyor. Figure 6 A schematic diagram of the limiting bar 225 used in a circuit board flipping conveyor. Figure 7 A schematic diagram of the limiting rod 22a used in a circuit board flipping conveyor. Figure 8 A schematic diagram of the second limiting rod 223 used in a circuit board flipping conveyor; Figure 9 A schematic diagram of the limiting block 224 used in a circuit board flipping conveyor; Figure 10This is a schematic diagram of the first working state of a flip-board conveyor for circuit boards. Figure 11 A schematic diagram of the structure of the first conveying drive component 13 for a circuit board flipping conveyor; Figure 12 A schematic diagram of the structure of the second type of conveying drive 13 for a circuit board flipping conveyor; Figure 13 This is a schematic diagram of the second working state of a flip-board conveyor for circuit boards. Figure 14 This is a schematic diagram of the third working state of a flip-board conveyor for circuit boards. Figure 15 A schematic diagram of the conveying assembly 1 for a flip-board conveying device used for circuit boards; Figure 16 This is a schematic diagram of the actual operation of a flip-board conveyor used for circuit boards; Illustration: Conveying assembly 1, transmission channel 1a, barrier component 2, barrier element 22, limiting bend 21b, guide rail 21, limiting bend 21b. Extrusion flange 21a, protrusion 21c, Limit rod 22a Limiting arc groove 221, first limiting rod 222 Limiting strip 225, limiting channel 225a, Second limiting rod 223, limiting block 224 Conveying component 11, conveying element 111, rotating drive component 12, conveying drive component 13 Hollow section 12a First synchronization pulley 131, second synchronization pulley 132 Example board material 001, transmission space 002. Detailed Implementation

[0009] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0010] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, 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 the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0011] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0012] This invention provides a flip-board conveying device for circuit boards, such as... Figure 1-16 As shown, it includes a conveying assembly 1 that can rotate around its own geometric center. The conveying assembly 1 is provided with a transmission channel 1a for moving the sheet material. A blocking component 2 is provided on one side of the transmission channel 1a. The barrier component 2 includes a barrier 22 connected to the conveying assembly 1, and a guide rail 21 with a limiting groove 21b pre-set at each end, and any limiting groove 21b is slidably engaged with the barrier 22. During operation, the conveying component 1 rotates, causing the barrier 22 to disengage from the limiting bend 21b. When the barrier 22 is squeezed by the guide rail 21, the barrier 22 rotates toward the transmission channel 1a and protrudes out of the transmission channel 1a.

[0013] like Figure 16 As shown, in actual operation, at least two of these devices are set at relative intervals to form a transmission space 002 between the relative transmission channels 1a, so as to carry out normal conveying of the example plate 001. This device is mainly used in SMT and other electronic manufacturing production lines as a flipping machine for PCB boards. Its core function is to flip the board with the A side processed by 180 degrees so that the B side faces the processing equipment (such as laser engraving equipment and chip mounting equipment) to achieve continuous double-sided automated processing. Specifically, when this device is in operation, a sample sheet 001 with one side already processed is input into the transmission space 002, and at the same time, the conveying component 1 starts working, moving the sample sheet 001 to the preset flipping position. At this point, conveying component 1 pauses its conveying operation and begins to rotate, that is, conveying component 1 rotates around its geometric center, causing the example board 001 to flip over. After the flipping is completed, the conveying component 1 works again to transfer the sample board 001 to the preset receiving device for subsequent processing. In this way, the device completes one work cycle. However, when the conveying assembly 1 carrying the example plate 001 rotates around its geometric center to perform a flipping operation, the plate will slide towards the lowest point of the transmission channel 1a at this time due to gravity, posing a risk of falling off the equipment. To address this problem, existing technologies offer one solution: using pneumatic or electric clamping devices (such as pneumatic plates) to clamp the example plate 001 from both sides. However, regardless of whether it is pneumatic or electric, it is necessary to connect to an external power source through connectors (such as power cables, air pipes, etc.). When the conveying component 1 rotates repeatedly, the connectors twist repeatedly as well. After long-term operation, they are prone to wear and even breakage, leading to equipment failure and seriously affecting production line efficiency. Another method is to use a push rod to drive an elastic element (such as a spring or torsion spring) to pull or push a blocking plate to constrain the example plate 001. However, after long-term repeated stress, the elastic element will experience elastic fatigue, resulting in weakening or failure of its elastic force, and thus it cannot reliably block the plate. Therefore, this device is equipped with a blocking component 2, specifically: When this device is not in operation: (e.g.) Figures 1-4 As shown, the barrier 22 is slidably engaged with any of the limiting bends 21b. At this time, the barrier 22 is fully retracted and will not obstruct the transmission channel 1a in any way. The plate can be driven forward or backward normally by the conveying component 1 in the channel. When this device is in operation: (e.g.) Figure 5 As shown, when the example board 001 moves to the preset flipping position, the conveying assembly 1 starts to rotate to perform the flipping operation, simultaneously driving the connected barrier 22 to move. As the moving barrier 22 disengages from the original limiting groove 21b constraint, it is squeezed by the side edge of the guide rail 21. At this time, the barrier 22 rotates in the direction of the transmission channel 1a, and part of it protrudes into the inside of the transmission channel 1a, thereby blocking the example plate 001 and preventing it from slipping off due to gravity during the flipping process; Furthermore, during the process of the conveying component 1 completing a 180-degree rotation, the barrier 22, under the action of the guide rail 21, always maintains a protruding blocking state; like Figure 10 , 13 As shown in Figure 14, when the conveying assembly 1 rotates to the position, the barrier 22 moves to the other end of the guide rail 21 and enters another limiting bend 21b. Under its compression, the barrier 22 rotates in the opposite direction and slides into the limiting bend 21b. At this time, the transmission channel is restored to unobstructed flow, and the example plate 001 that has been flipped can be conveyed out by the conveying assembly 1. Throughout the entire operation of this device, no pneumatic or electric drive device is required for the barrier 22, which fundamentally avoids the problem of twisting, wear, and breakage of the connecting parts caused by the rotation of the conveying component 1. Furthermore, the entire blocking and resetting action of the barrier 22 is triggered and constrained by the physical limiting and squeezing of the barrier 22 by the geometry of the guide rail 21, without the need for any elastic components, thus avoiding the reliability risks of existing technologies that use elastic components and fail due to fatigue. Furthermore, there is no need to set up independent electrical control logic, sensors, or drive units for the barrier 22 and the guide rail 21, which greatly simplifies the device structure and reduces manufacturing costs and maintenance complexity.

[0014] Preferably, the guide rail 21 is provided with an arc-shaped extrusion protrusion 21a, and each end of the extrusion protrusion 21a is connected to the side edge of a limiting groove 21b to form a protrusion 21c.

[0015] Preferably, the barrier 22 extends into the limiting groove 21b to form a limiting rod 22a, and the outer periphery of the limiting rod 22a is tangent to the limiting groove 21b and two opposite lateral edges.

[0016] Specifically, when the device is not in operation: in the initial or reset state, the outer peripheral surface of the limiting rod 22a will be exactly inside a limiting groove 21b and tangent to the two opposing inner edges of the limiting groove 21b, thereby restricting the degree of freedom of the barrier 22 around its own axis of rotation, preventing it from rotating arbitrarily in any direction, thus ensuring the stability of the barrier 22 in the non-operating state, so that it will not accidentally protrude out of the transmission channel 1a and interfere with the conveying of the example plate 001; At work: such as Figure 4 and Figure 5 As shown, when the conveying assembly 1 rotates, it drives the blocking component 22 and its limiting rod 22a to move synchronously. The limiting rod 22a first disengages from the limiting groove 21b. Instead, it is pressed by the protrusion 21c. At this time, the limiting rod 22a is subjected to force, which pushes the blocking member 22. The pushed blocking member 22 rotates around its axis in the direction of the transmission channel 1a, and then protrudes out of the transmission channel 1a. Then the limiting rod 22a contacts the extrusion flange 21a. Under the thrust of the extrusion flange 21a, the limiting rod 22a is forced, pushing the entire blocking member 22 to rotate around its axis in the direction of the transmission channel 1a, thereby achieving continuous protrusion blocking. As the conveying assembly 1 continues to rotate, the limiting rod 22a moves to the other end of the track and is about to enter another limiting bend 21b. It will first contact the protrusion 21c. Under the pressure of the protrusion 21c, the limiting rod 22a pushes the blocking member 22 and slides into the new limiting bend 21b. At this time, the blocking member 22 retracts and the transmission channel 1a is unobstructed. Through the mechanical cooperation of the limiting rod 22a with the extrusion flange 21a, the groove 21b and the limiting protrusion 21c, the blocking action of the blocking member 22 is coordinated with the rotational movement of the conveying assembly 1.

[0017] Preferably, the barrier 22 is provided with a limiting component to constrain the rotation angle of the barrier 22.

[0018] In actual work, when the barrier 22 is freed from the constraint of the limiting bend 21b and protrudes out of the blocking plate under the push of the extrusion flange 21a, since the barrier 22 itself is only connected to the conveying assembly 1 through a rotating shaft and is in a "cantilever" state, the vibration generated by the rotation of the conveying assembly 1 will be transmitted to the barrier 22, causing it to shake uncontrollably. At this time, the protruding end of the barrier 22 comes into contact with the side of the example plate 001, causing friction between the barrier 22 and the example plate 001, which may result in scratches on the plate surface or damage to the solder resist layer, seriously affecting the production quality of the product. Therefore, a limit component is provided on the barrier 22 to provide a rotation angle constraint when the barrier 22 rotates to the working position (protruding out of the transmission channel 1a), preventing it from shaking in an unexpected direction, thereby protecting the plate. Preferably, the limiting component is a limiting arc groove 221 formed in the barrier 22, and a first limiting rod 222 disposed in the limiting arc groove 221, and one end of the first limiting rod 222 is connected to the conveying assembly 1 to limit the rotation angle of the barrier 22.

[0019] Specifically, such as Figure 4 and Figure 5 As shown, the limiting component is preferably a limiting arc groove 221 in the shape of an arc. Its center coincides with the rotation center of the barrier 22, and the arc length of the limiting arc groove 221 corresponds to the protrusion height of the extrusion flange 21a. For example, if the width of the extrusion flange 21a increases, the pushing force on the barrier 22 during movement increases (e.g., the rotation angle of the barrier 22 increases from the original 30° to 45°), then the arc length of the limiting arc groove 221 needs to be reset according to this change in rotation angle to ensure that it can cover the entire trajectory range of the barrier 22 from the initial position to the rotation of 45°. During operation, when the barrier 22 is pushed and rotated by the compression protrusion 21a, the limiting arc groove 221 moves relative to the fixed first limiting rod 222. The rotation angle of the barrier 22 is limited within the arc length range of the limiting arc groove 221. Once the rotation is in place, the end of the limiting arc groove 221 will abut against the first limiting rod 222 to form a limit. At this time, the entire barrier 22 is simultaneously limited by the limiting arc groove 221, and the limiting rod 22a is limited by the pressing protrusion 21a. This achieves bidirectional locking, eliminates the shaking offset space, and ensures the stability of the working state of the barrier 22.

[0020] Preferably, the limiting component is a limiting strip 225; both ends of the limiting strip 225 are respectively connected to the side edge of the corresponding limiting groove 21b, and there is a gap between the limiting strip 225 and the extrusion protrusion 21a to form a limiting channel 225a; During operation, the outer periphery of the moving limit rod 22a is tangent to the relative edge of the limit channel 225a.

[0021] Specifically, such as Figure 6 As shown, the limiting component is preferably a limiting strip 225. The two ends of the limiting strip 225 are fixedly connected to the inner edges of the two limiting grooves 21b at both ends of the guide rail 21; the limiting strip 225 and the extrusion protrusion 21a are kept at a certain interval, thereby forming the limiting channel 225a; The inner spaces of the two limiting bends 21b are connected to the limiting channel 225a, forming a continuous limiting space. Throughout the entire working process (from entering one limiting groove 21b, to sliding over the extrusion flange 21a, and then entering another limiting groove 21b), the outer periphery of the limiting rod 22a remains in contact with the inner edge of the limiting space (i.e., the inner edge of the limiting groove 21b and the opposite edge of the limiting channel 225a). That is, regardless of whether the barrier 22 is in the retracted state (limiting rod 22a is in the limiting groove 21b) or the protruding working state (limiting rod 22a is in the limiting channel 225a), the radial position of the barrier 22 is always constrained by the closed-loop channel formed by the limiting space, thus fundamentally eliminating any possibility of the barrier 22 shaking.

[0022] Preferably, the limiting component is a limiting block 224 disposed on one side of the barrier 22, and a second limiting rod 223 connected to the barrier 22, and there is a gap between the second limiting rod 223 and the limiting block 224.

[0023] Specifically, such as Figures 7-9 As shown, the limiting components are preferably a second limiting rod 223 and a limiting block 224. The installation position of the limit block 224 needs to cooperate with the second limit rod 223. When the barrier 22 rotates to the working position (i.e. protruding out of the transmission channel 1a), the two just make contact. When the blocking member 22 is pushed by the compression protrusion 21a to rotate in the direction of the transmission channel 1a, it will drive the second limiting rod 223 to move in the direction of the limiting block 224. When the blocking member 22 rotates to the preset blocking angle (working position), the second limiting rod 223 just moves to the position where it abuts against the limiting block 224. At this time, the further rotation of the barrier 22 is blocked by the limit block 224. The limit structure is simple, reliable and easy to manufacture, and can effectively prevent the barrier 22 from shaking or shifting in the working position.

[0024] Preferably, the conveying component 1 includes, The conveying component 11 includes at least two conveying elements 111 spaced apart to form a conveying channel 1a; The central axis of the drive end of the rotating drive component 12 overlaps with the geometric center of the conveying component 11. A conveyor drive 13 passes through the central axis and is connected to all conveyors 111 to provide drive for the conveyors 111.

[0025] Preferably, the rotation drive 12 is a hollow rotating platform, which is provided with a hollow part 12a, and the central axis is located inside the hollow part 12a.

[0026] Preferably, the conveying drive 13 includes at least two second synchronous pulleys 132 respectively connected to the corresponding conveying components 11, and a plurality of second synchronous pulleys 132 are connected to first synchronous pulleys 131 by synchronous belts, and the axis of the first synchronous pulleys 131 overlaps with the central axis.

[0027] Specifically, this device achieves the two actions of conveying and flipping the example plate 001 through the conveying component 1; like Figure 15 As shown, the conveying component 11 includes at least two conveying elements 111 spaced apart. The space formed between these conveying elements 111 constitutes the transmission channel 1a. The conveying elements 111 are preferably synchronous belts, rollers, or friction wheels, used to directly contact and drive the plate to move. The rotation drive 12 is the power source for the entire conveying assembly 1 to achieve rotation. The central axis of the drive end of the rotation drive 12 is completely overlapped with the geometric center of the conveying component 11. Thus, when the rotation drive 12 is working, it can drive the conveying component 11 to rotate smoothly around its geometric center and complete the flipping action. However, the problem with the existing technology is that the conveying component 11 not only needs to be able to rotate, but also needs independent power to drive the conveying component 111 to rotate in order to realize the conveying of the example plate 001. In the prior art, the power supply for the conveyor 111 is typically a direct-drive motor, which needs to be connected to an external power source via a connector (such as a power cable). When the conveying component 11 rotates as a whole, the connecting parts will twist accordingly. Over long-term operation, the repeated twisting can easily cause wear and breakage, leading to equipment failure and greatly reducing the reliability and efficiency of the production line. Therefore, the conveying drive 13 passes through the central axis of the rotating drive 12 and is connected to all the conveying components 111, providing driving power to the conveying components 111. By arranging the power transmission path of the conveying drive 13 on the rotating axis, it can rotate together with the conveying component 11 without the need for external moving cables on the rotating component, thereby fundamentally avoiding the problem of twisting wear of the connecting parts during rotation. Specifically, such as Figure 10 As shown, the rotation drive 12 is a hollow rotating platform, which has a hollow section 12a through which the conveying drive 13 passes. Specifically, such as Figure 11 and Figure 12 As shown, the conveyor drive 13 includes a first synchronous pulley 131 and at least two second synchronous pulleys 132. The key point is that the axis of the first synchronous pulley 131 overlaps with the central axis of the rotating drive component 12. The first synchronous pulley 131 is driven by an external motor, which does not rotate with the conveying component 1. During operation, a stationary external motor drives the first synchronous pulley 131 to rotate. The power is transmitted to each of the second synchronous pulleys 132 via a synchronous belt, thereby driving all conveying components 111 to rotate synchronously, thus realizing the conveying of the example plate 001. When a flipping operation is required, the drive unit 12 (hollow rotating platform) is turned to work, driving the entire conveying component 11 and all the second synchronous pulleys 132 and synchronous belts installed on it to rotate together around the axis (i.e., the central axis) of the first synchronous pulley 131. Since the axis of the first synchronous pulley 131 is on the rotation axis, and it is driven by an external motor and does not rotate, At this time, the meshing position of the synchronous belt and the first synchronous pulley 131 will change in the circumferential direction, but the tension of the synchronous belt and the transmission relationship are maintained throughout the entire rotation process, and the power transmission is uninterrupted.

[0028] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flip-board conveying device for circuit boards, characterized in that, It includes a conveying assembly (1) capable of rotating around its own geometric center. The conveying assembly (1) is provided with a transmission channel (1a) for moving the plate. A blocking component (2) is provided on one side of the transmission channel (1a). The barrier component (2) includes a barrier member (22) connected to the conveying assembly (1) and a guide rail (21) with a limiting groove (21b) at each end, and any of the limiting grooves (21b) is slidably engaged with the barrier member (22). During operation, the conveying assembly (1) rotates, causing the barrier (22) to disengage from the limiting bend (21b). When the barrier (22) is squeezed by the guide rail (21), the barrier (22) rotates toward the transmission channel (1a) and protrudes out of the transmission channel (1a).

2. The circuit board flipping and conveying device according to claim 1, characterized in that, The guide rail (21) is provided with an arc-shaped extrusion protrusion (21a), and each end of the extrusion protrusion (21a) is connected to the side edge of a limiting groove (21b) to form a protrusion (21c).

3. The circuit board flipping and conveying device according to claim 2, characterized in that, The barrier (22) extends into the limiting groove (21b) to form a limiting rod (22a), and the outer periphery of the limiting rod (22a) is tangent to the limiting groove (21b) and two opposite lateral edges.

4. The circuit board flipping and conveying device according to claim 3, characterized in that, The barrier (22) is provided with a limit component to constrain the rotation angle of the barrier (22).

5. The circuit board flipping and conveying device according to claim 4, characterized in that, The limiting component is a limiting arc groove (221) formed in the barrier (22) and a first limiting rod (222) disposed in the limiting arc groove (221), and one end of the first limiting rod (222) is connected to the conveying assembly (1) to limit the rotation angle of the barrier (22).

6. The flip-board conveying device for circuit boards according to claim 4, characterized in that, The limiting component is a limiting strip (225); The two ends of the limiting strip (225) are respectively connected to the side edge of the corresponding limiting groove (21b), and there is a gap between the limiting strip (225) and the extrusion protrusion (21a) to form a limiting channel (225a). During operation, the outer periphery of the moving limiting rod (22a) is tangent to the relative edge of the limiting channel (225a).

7. The circuit board flipping and conveying device according to claim 4, characterized in that, The limiting component is a limiting block (224) disposed on one side of the barrier (22) and a second limiting rod (223) connected to the barrier (22), and there is a gap between the second limiting rod (223) and the limiting block (224).

8. The flip-board conveying device for circuit boards according to any one of claims 1-7, characterized in that, The conveying assembly (1) includes, The conveying component (11) includes at least two conveying elements (111) spaced apart to form a conveying channel (1a). The rotation drive (12) has its central axis at the drive end overlapping with the geometric center of the conveying component (11); A conveyor drive (13) passes through the central axis and is connected to all the conveyors (111) to provide drive for the conveyors (111).

9. The flip-board conveying device for circuit boards according to claim 8, characterized in that, The rotation drive (12) is a hollow rotating platform, which is provided with a hollow part (12a), and the central axis is located inside the hollow part (12a).

10. The flip-board conveying device for circuit boards according to claim 8, characterized in that, The conveying drive (13) includes at least two second synchronous pulleys (132) respectively connected to the corresponding conveying component (11), and a plurality of second synchronous pulleys (132) are connected to first synchronous pulleys (131) by synchronous belts, and the axis of the first synchronous pulley (131) overlaps with the central axis.

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