PCB (Printed Circuit Board) batch detection table

Abstract

The invention provides a PCB batch detection table, and relates to the technical field of electronic equipment manufacturing, the PCB batch detection table comprises an equipment platform, the equipment platform is provided with a conveyor belt used for conveying PCBs, a rotating disc driven by a motor to rotate, and detection equipment arranged around the rotating disc in a surrounding manner and used for detecting the PCBs; the rotating disc is arranged above the conveying belt, the vertical projection of the edge part of the rotating disc is always projected on the conveying belt, a plurality of openings are formed in the edge part of the rotating disc in an annular array mode, and each opening is provided with a grabbing mechanism; the grabbing mechanism comprises a mounting frame, a micro motor arranged on the mounting frame and an overturning column connected to the power output end of the micro motor through a rotating shaft, and a first electric telescopic rod and a second electric telescopic rod are arranged on one side of the overturning column side by side. The PCB batch detection table aims to solve the problems in the prior art, and realizes high-efficiency, high-precision and low-cost PCB detection.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic device manufacturing, and particularly to an efficient, high-precision and low-cost solution for PCB circuit board detection. Background Art

[0002] In the electronic manufacturing industry, as a basic component of electronic devices, the quality and performance of a PCB (Printed Circuit Board) directly affect the stability and reliability of the final product. Therefore, efficient and accurate detection of PCB circuit boards is an essential part of the production process. Traditionally, the detection of PCB circuit boards mainly relies on manual grasping and placement or the use of special robotic arms for grasping and placement. However, both of these methods have certain limitations.

[0003] Although the method of manual grasping and placement has the advantages of strong adaptability and low cost, in actual operation, due to the limited efficiency and accuracy of manual operation, it often cannot meet the requirements of large-scale production. In addition, manual operation is also easily affected by factors such as fatigue and emotion, resulting in poor stability and consistency of the detection results.

[0004] On the other hand, although the use of special robotic arms for grasping and placement can improve the detection efficiency and placement accuracy, their high procurement cost and maintenance cost are a heavy burden for small and medium-sized enterprises. Especially for those small and medium-sized enterprises with limited funds but in need of efficient detection means, it is particularly important to find a detection solution with lower cost and higher efficiency.

[0005] Based on the above background, there is an urgent need in the market for a PCB circuit board detection mechanism that can balance high detection efficiency, high placement accuracy, but relatively low cost. Summary of the Invention

[0006] The present invention provides a batch detection table for PCB circuit boards, aiming to solve the problems existing in the prior art and achieve efficient, high-precision and low-cost detection of PCB circuit boards.

[0007] The above technical object of the present invention is achieved through the following technical solutions: A batch detection table for PCB circuit boards, including an equipment platform, on which there is a conveyor belt for transporting PCB circuit boards, a turntable driven by a motor to rotate, and a detection device arranged around the turntable for detecting the PCB circuit boards;

[0008] The turntable is arranged above the conveyor belt, the vertical projection of the edge part of the turntable always hits the conveyor belt, and a plurality of openings are arranged in a circular array on the edge part of the turntable, and a grasping mechanism is arranged at each opening;

[0009] The grasping mechanism includes a mounting frame, a micro motor disposed on the mounting frame, and a flipping column connected to the power output end of the micro motor through a rotating shaft. On one side of the flipping column, a first electric telescopic rod and a second electric telescopic rod are arranged side by side. The movable end of the first electric telescopic rod is fixedly connected to a first bearing plate, and the movable end of the second electric telescopic rod is horizontally and translationally movably connected to a second bearing plate. A spring is connected between the first bearing plate and the second bearing plate. On the sides of the first bearing plate and the second bearing plate away from each other, an elastic first grasping ridge and a second grasping ridge are respectively provided. The PCB circuit board can be press-fitted between the first grasping ridge and the second grasping ridge;

[0010] Wherein, through the movement of the conveyor belt and the cooperation of the first electric telescopic rod and the second electric telescopic rod, the opening and closing action of the grasping mechanism is realized to grasp, place and flip the PCB circuit board for detection.

[0011] In some embodiments, the detection device includes an X-ray detector, an automatic optical inspection device, and an in-line tester, which are sequentially arranged along the rotation direction of the turntable.

[0012] In some embodiments, the ends of the first grasping ridge and the second grasping ridge are both bent towards the direction of their mutual approach to jointly form a clamping space.

[0013] In some embodiments, anti-slip patterns are provided on the sides of the first grasping ridge and the second grasping ridge in contact with the PCB circuit board.

[0014] In some embodiments, the materials of the first grasping ridge and the second grasping ridge are both high molecular materials.

[0015] In some embodiments, a plurality of rows of the springs connected between the first bearing plate and the second bearing plate are provided.

[0016] In some embodiments, an automatic control system is further included. The automatic control system is electrically connected to the conveyor belt, the motor, the micro motor, the first electric telescopic rod, the second electric telescopic rod, and the detection device, and is used to control the automated operation of the entire PCB circuit board batch detection table.

[0017] In some embodiments, the spring includes an outer spring and an inner spring coaxially arranged inside the outer spring, and the elastic coefficient of the outer spring is less than that of the inner spring.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] By adopting the combination of a conveyor belt and a turntable, the present invention realizes the continuous, efficient transmission and detection of PCB circuit boards. The grasping mechanism on the turntable can grasp the PCB circuit boards one by one as the turntable rotates and perform detection, greatly improving the detection efficiency and accuracy. At the same time, due to the coordinated work between the grasping mechanism and the detection device, the continuity and stability of the detection process are ensured.

[0020] The grasping mechanism of the present invention is ingeniously designed, using the movement of the conveyor belt to achieve the opening and closing actions, without the need for additional complex driving devices. This not only simplifies the structure of the grasping mechanism but also reduces the manufacturing cost and maintenance cost.

[0021] The grasping mechanism of the present invention can adapt to PCB circuit boards of different sizes and types. By adjusting the opening and closing degree of the grasping ridges and the elastic force of the springs, stable grasping and placement of circuit boards with different thicknesses, shapes, and weights can be achieved. This greatly enhances the adaptability and flexibility of the device, meeting different production requirements. Brief Description of the Drawings

[0022] Figure 1 is the overall structure diagram of the present invention;

[0023] Figure 2 is the detailed structure diagram of the turntable of the present invention;

[0024] Figure 3 is the detailed structure diagram of the grasping mechanism of the present invention;

[0025] Figure 4 is the detailed assembly diagram of the first bearing plate, the second bearing plate, the first grasping ridge, the second grasping ridge, and the spring of the present invention;

[0026] Figure 5 is the schematic diagram of the grasping mechanism when the PCB circuit board of the present invention just runs close to the second grasping ridge along with the conveyor belt;

[0027] Figure 6 is the schematic diagram of the grasping mechanism when the second electric telescopic rod of the present invention extends;

[0028] Figure 7 is the schematic diagram of the grasping mechanism when the second bearing plate and the second grasping ridge of the present invention move together with the conveyor belt and cause the spring to be stretched;

[0029] Figure 8 is the schematic diagram of the grasping mechanism when both the first electric telescopic rod and the second electric telescopic rod of the present invention extend and the PCB circuit board is between the first grasping ridge and the second grasping ridge;

[0030] Figure 9Schematic diagram of the grasping mechanism after the second bearing plate, the second grasping ridge and the spring are reset and the PCB circuit board is clamped between the first grasping ridge and the second grasping ridge of the present invention;

[0031] Figure 10 Schematic diagram of the grasping mechanism of the present invention when the PCB circuit board is clamped between the first grasping ridge and the second grasping ridge and both the first electric telescopic rod and the second electric telescopic rod are retracted;

[0032] Figure 11 Schematic diagram of the grasping mechanism of the present invention when the PCB circuit board is clamped between the first grasping ridge and the second grasping ridge and the flipping column is flipped by 180°;

[0033] Figure 12 Detailed structural diagram of the spring of the present invention.

[0034] In the figure: 100, PCB circuit board; 1, equipment platform; 2, conveyor belt; 3, turntable; 301, opening; 4, grasping mechanism; 401, mounting frame; 402, micro motor; 403, rotating shaft; 404, flipping column; 405, first electric telescopic rod; 406, first bearing plate; 407, first grasping ridge; 408, spring; 4081, outer spring; 4082, inner spring; 409, second electric telescopic rod; 410, second bearing plate; 411, second grasping ridge; 5, X-ray detector; 6, automatic optical inspection equipment; 7, in-line tester; The arrow "→" in the figure indicates the transmission direction of the conveyor belt. Detailed implementation manners

[0035] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0038] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] Traditionally, when detecting the PCB circuit board 100, there are mainly two methods for grasping the PCB circuit board 100. One is manual grasping and placing, which has the advantages of strong adaptability and low cost, but the disadvantages of low efficiency and low precision. The other is to use a dedicated robotic arm for grasping and placing, which has the advantages of high efficiency and high placement precision, but the disadvantages of relatively high procurement cost and maintenance cost. For some small and medium-sized enterprises, the cost issue has always been relatively important. Therefore, there is a need in the market for a PCB circuit board 100 detection mechanism that can balance high detection efficiency, high placement precision, but low cost. For this, as Figures 1-4 shown, this embodiment provides a batch detection table for PCB circuit boards, which includes an equipment platform 1. On the equipment platform 1, there is a conveyor belt 2 for transporting the PCB circuit board 100, a turntable 3 driven by a motor to rotate, and detection equipment arranged around the turntable 3 for detecting the PCB circuit board 100;

[0040] As Figures 1-2 shown, the turntable 3 is arranged above the conveyor belt 2. The vertical projection of the edge part of the turntable 3 always hits the conveyor belt 2. A plurality of openings 301 are arranged in a circular array on the edge part of the turntable 3. As the turntable 3 rotates, each opening 301 can move one by one to the directly above the conveyor belt 2. A grasping mechanism 4 is provided at each opening 301. The grasping mechanism 4 is used to grasp the PCB circuit board 100 on the conveyor belt 2 and rotate together with the turntable 3. During this period, the grasped PCB circuit board 100 passes through the detection equipment for detection. After the detection is completed, the grasped PCB circuit board 100 will rotate back to the directly above the conveyor belt 2 with the turntable 3, and the grasped PCB circuit board 100 that has completed the detection will be placed back on the conveyor belt 2 by means of the grasping mechanism 4;

[0041] AsFigures 3-4 As shown, the grasping mechanism 4 includes a mounting frame 401, a micro motor 402 provided on the mounting frame 401, and a turning column 404 connected to the power output end of the micro motor 402 through a rotating shaft 403. On one side of the turning column 404, a first electric telescopic rod 405 and a second electric telescopic rod 409 are arranged side by side. When the grasping mechanism 4 moves to directly above the conveyor belt 2, the first electric telescopic rod 405 is close to the starting point of the conveyor belt 2, and the second electric telescopic rod 409 is close to the end point of the conveyor belt 2. The movable end of the first electric telescopic rod 405 is fixedly connected with a first bearing plate 406 parallel to the transmission surface of the conveyor belt 2. The movable end of the second electric telescopic rod 409 is horizontally and translationally connected with a second bearing plate 410 parallel to the transmission surface of the conveyor belt 2. The second bearing plate 410 can reciprocate horizontally along the transmission direction of the conveyor belt 2. A spring 408 is connected between the first bearing plate 406 and the second bearing plate 410. Elastic first grasping ridges 407 and second grasping ridges 411 are respectively arranged on the sides of the first bearing plate 406 and the second bearing plate 410 away from each other. The PCB circuit board 100 can be press-fitted between the first grasping ridges 407 and the second grasping ridges 411;

[0042] When detecting the PCB circuit board 100, first, the PCB circuit board 100 to be detected is transported under the grasping mechanism 4 by means of the conveyor belt 2 until the edge of the PCB circuit board 100 is about to reach the second grasping ridge 411 (as Figure 5 shown), then, control the second electric telescopic rod 409 to extend its movable end downward until the second grasping ridge 411 is press-fitted against the transmission surface of the operating conveyor belt 2 (as Figure 6 shown). At this time, a frictional force will be generated between the second grasping ridge 411 and the conveyor belt 2. Under the action of this frictional force, as the conveyor belt 2 continues to operate, the second grasping ridge 411 and the second bearing plate 410 will move horizontally together with the conveyor belt 2. During this period, the distance between the first bearing plate 406 and the second bearing plate 410 and the distance between the first grasping ridge 407 and the second grasping ridge 411 will gradually increase, and the spring 408 between the first bearing plate 406 and the second bearing plate 410 will also be gradually stretched and generate elastic retraction potential energy (as Figure 7 shown). When the distance between the first grasping ridge 407 and the second grasping ridge 411 expands to be greater than the grasping width of the PCB circuit board 100, then pause the operation of the conveyor belt 2, and then control the first electric telescopic rod 405 to extend its movable end downward until the first grasping ridge 407 just touches the transmission surface of the conveyor belt 2 (as Figure 8As shown, then, control the second electric telescopic rod 409 to slightly retract its movable end, so that the second grasping ridge 411 and the conveyor belt 2 change from "interference extrusion" to "just contact". At this time, the friction between the second grasping ridge 411 and the conveyor belt 2 is greatly reduced, enabling the second bearing plate 410 and the second grasping ridge 411 to quickly reset and retract under the elastic potential energy of the spring 408. During this period, the distance between the first bearing plate 406 and the second bearing plate 410, and the distance between the first grasping ridge 407 and the second grasping ridge 411 both decrease, thus achieving stable clamping of the PCB circuit board 100 (as Figure 9 shown). After the PCB circuit board 100 is clamped by the first grasping ridge 407 and the second grasping ridge 411, synchronously control the first electric telescopic rod 405 and the second electric telescopic rod 409 to retract their movable ends to pick up the PCB circuit board 100 from the conveyor belt 2 (as Figure 10 shown). Then, control the turning column 404 to turn 180° through the micro motor 402, so that the PCB circuit board 100 is exposed on the turntable 3 (as Figure 11 shown). Then, as the turntable 3 rotates, the grasped PCB circuit board 100 passes through the detection device for detection. After the detection is completed, the grasping mechanism 4 carries the detected PCB circuit board 100 back above the conveyor belt 2. When it is necessary to unload the detected PCB circuit board 100, first, control the turning column 404 to turn 180° through the micro motor 402, so that the PCB circuit board 100 passes through the opening 301 of the turntable 3 and returns to the side of the turntable 3 facing the conveyor belt 2. Then, start the conveyor belt 2 and synchronously control the first electric telescopic rod 405 and the second electric telescopic rod 409 to extend their movable ends until the first grasping ridge 407 just touches the conveyor belt 2 and the second grasping ridge 411 interferes and abuts against the transmission surface of the running conveyor belt 2. At this time, due to the huge friction between the second grasping ridge 411 and the conveyor belt 2, the second grasping ridge 411 and the second bearing plate 410 will move horizontally together with the conveyor belt 2. During this period, the distance between the first bearing plate 406 and the second bearing plate 410, and the distance between the first grasping ridge 407 and the second grasping ridge 411 both gradually increase, resulting in the PCB circuit board 100 originally tightly clamped by the first grasping ridge 407 and the second grasping ridge 411 gradually disengaging from the clamping. After the PCB circuit board 100 is completely disengaged from the clamping, sequentially control the first electric telescopic rod 405 and the second electric telescopic rod 409 to retract their movable ends. At this time, the PCB circuit board 100 is neither clamped and grasped nor blocked during transmission. The detected PCB circuit board 100 will be continuously conveyed by the conveyor belt 2 to the next process.

[0043] The present invention utilizes the movement of the conveyor belt 2 to achieve the opening and closing actions of the grasping mechanism 4. In terms of power, the conveyor belt 2 is utilized. This design not only simplifies the structure of the grasping mechanism 4 but also improves its working reliability and stability. Specifically, by utilizing the movement of the conveyor belt 2, the grasping mechanism 4 does not require an additional complex driving device to achieve opening and closing. This reduces the number of components of the grasping mechanism 4, lowers the manufacturing cost, and improves the convenience of its maintenance. The movement of the conveyor belt 2 is continuous and stable, so the opening and closing actions of the grasping mechanism 4 can also be kept continuous and stable. This reduces the risk of grasping failure or damage to the PCB board 100 caused by mechanism failures or unstable actions. And by means of the movement of the conveyor belt 2, the grasping mechanism 4 can more easily adapt to different sizes and types of PCB boards 100. Regardless of how the size, shape, or weight of the circuit board changes, the grasping mechanism 4 can ensure stable and accurate grasping by adjusting its opening and closing degree. Additionally, since the opening and closing actions of the grasping mechanism 4 are synchronized with the movement of the conveyor belt 2, the entire detection process can proceed more smoothly. This reduces the time wasted due to waiting for the grasping mechanism 4 to open and close, improving the detection efficiency. Moreover, the entire device of the present invention has a simple structure, and when the grasping mechanism 4 is working, it only needs to control the micro motor 402, the first electric telescopic rod 405, and the second electric telescopic rod 409. When setting up an automated program for them, it will also be very simple.

[0044] In some embodiments, as Figure 1 shown, the detection device includes an X-ray detector 5, an automatic optical inspection device 6, and an in-circuit tester 7. The X-ray detector 5, the automatic optical inspection device 6, and the in-circuit tester 7 are arranged in sequence along the rotation direction of the turntable 3. Among them, the X-ray detector 5 uses X-rays to penetrate the PCB board 100 to detect the welding quality, component layout, line integrity, etc. inside the circuit board, and is particularly suitable for discovering hidden defects such as internal cracks, false soldering, and foreign objects, ensuring the integrity of the internal structure of the circuit board. The automatic optical inspection device 6 (AOI) conducts a detailed inspection of the surface of the PCB board 100 through a high-resolution camera and advanced image processing technology, and can accurately identify and report appearance defects on the circuit board, such as component misalignment, missing, damage, printing errors, etc., improving the quality control of the product surface. The in-circuit tester 7 (ICT) tests the electrical performance of the circuit board under the energized state of the circuit board, including the measurement of parameters such as resistance, capacitance, voltage, and current, as well as functional tests, ensuring that the function of the circuit board is normal and meets the design requirements.

[0045] In some embodiments, as Figure 4As shown, the ends of the first grasping rib 407 and the second grasping rib 411 are both bent towards the direction in which they approach each other to jointly form a clamping space. The above structure enables the first grasping rib 407 and the second grasping rib 411 to form a tighter wrap when clamping the PCB board 100, reducing the possibility of the PCB board 100 shaking or slipping during the clamping process.

[0046] Preferably, anti-slip patterns are provided on the sides of the first grasping rib 407 and the second grasping rib 411 that are in contact with the PCB board 100. The anti-slip patterns can significantly increase the friction between the first grasping rib 407 and the second grasping rib 411 and the PCB board 100, thereby ensuring that the PCB board 100 can be firmly clamped during the grasping and moving processes and will not easily slip off due to external forces.

[0047] Preferably, the materials of the first grasping rib 407 and the second grasping rib 411 are both polymer materials, preferably wear-resistant polymer materials. This material can effectively extend the service life of the grasping mechanism 4 and reduce problems such as the decrease in clamping force or the failure of the anti-slip patterns caused by wear. In addition, polymer materials usually have a relatively light weight and good processing performance, which enables the grasping ribs to reduce the weight of the entire grasping mechanism 4 while maintaining sufficient strength and durability. The polymer materials selected in the present invention include, but are not limited to, polycarbonate, nylon, polyoxymethylene, and polyurethane.

[0048] In some embodiments, as Figure 4 shown, a plurality of rows of springs 408 are provided between the first bearing plate 406 and the second bearing plate 410. The arrangement of the plurality of rows of springs 408 can significantly increase the connection stability and elastic restoring force between the first bearing plate 406 and the second bearing plate 410. During the operation of the grasping mechanism 4, when a huge frictional force is generated between the second grasping rib 411 and the conveyor belt 2, causing the second bearing plate 410 and the second grasping rib 411 to translate horizontally with the conveyor belt 2, the plurality of springs 408 can jointly bear and disperse this pulling force, preventing a single spring 408 from being damaged or failing due to excessive force. At the same time, when it is necessary to release the clamped PCB board 100, the plurality of springs 408 can also jointly provide sufficient elastic restoring force to ensure that the second bearing plate 410 and the second grasping rib 411 can quickly reset and retract, thereby realizing the stable clamping and release of the PCB board 100.

[0049] In certain embodiments, an automatic control system is also included, which is the core control unit of the entire PCB circuit board batch detection platform. The system is composed of two parts, hardware and software, and the hardware part includes a processor, a memory, an input-output interface, etc., and the software part includes a control algorithm and a logic program, and the automatic control system is electrically connected to a conveyor belt 2, a motor, a micro motor 402, a first electric telescopic rod 405, a second electric telescopic rod 409, and a detection device, for controlling the automatic operation of the entire PCB circuit board batch detection platform. Specifically, the automatic control system is electrically connected to a conveyor belt 2, a motor, a micro motor 402, a first electric telescopic rod 405, a second electric telescopic rod 409, and each detection device (such as an X-ray detection machine 5, an automatic optical inspection device 6, an online tester 7) through an input-output interface. It receives feedback signals (such as the position signal of the conveyor belt 2, the speed signal of the motor, the opening and closing state signal of the gripping mechanism 4, and the detection result signal of the detection device, etc.) from each sensor in real time according to preset programs and logic, and makes corresponding control decisions accordingly.

[0050] By introducing the automatic control system, the PCB circuit board batch inspection station of the present invention realizes comprehensive automatic operation, greatly improving the inspection efficiency and the automation level of the production line. Specifically, the automatic control system can accurately control the start and stop and speed of the conveyor belt 2, ensuring that the PCB circuit board 100 is accurately conveyed to the bottom of the grasping mechanism 4 according to the predetermined rhythm and position. At the same time, through the coordinated work with the motor, the micro motor 402, the first electric telescopic rod 405 and the second electric telescopic rod 409, the automatic control system can accurately control the opening and closing action and the flipping angle of the grasping mechanism 4, realize the stable grasping, placement and flipping of the PCB circuit board 100, and ensure the smooth progress of the inspection process.

[0051] In addition, the automatic control system is preferably capable of monitoring the working status and test results of the test equipment in real time, and classifying and marking the PCB circuit boards 100 according to the test results. This helps to promptly discover and deal with circuit boards with problems, improve product quality and the overall efficiency of the production line. At the same time, the automatic control system can also store and analyze the test data, providing strong data support for production management and quality control.

[0052] In some embodiments, Figure 12As shown, the spring 408 includes an outer spring 4081 and an inner spring 4082 coaxially disposed within the outer spring 4081. The elastic coefficient of the outer spring 4081 is less than that of the inner spring 4082. The main function of the outer spring 4081 is to provide a flexible framework for the inner spring 4082. At the same time, due to the inconsistent elastic coefficients of the outer spring 4081 and the inner spring 4082, especially when the elastic coefficient of the inner spring 4082 is greater, under the action of the same external force, the deformation degree of the outer spring 4081 will be greater than that of the inner spring 4082. In the PCB board batch detection table of the present invention, the grasping mechanism 4 needs to frequently perform opening and closing actions to achieve efficient grasping and placement of the PCB board 100. During this process, the spring 408 will undergo high-frequency rapid deformation, bending, and stretching. Due to the larger deformation degree of the outer spring 4081, it will come into frequent contact with the inner spring 4082. This kind of contact not only does not reduce the performance of the spring 408, but instead can enhance the stability of the inner spring 4082. Specifically, the outer spring 4081 provides a reliable supporting force for the inner spring 4082 during the deformation process, enabling the inner spring 4082 to maintain its original elasticity and shape under high-frequency deformation and not easily undergo plastic deformation or fatigue failure.

[0053] In addition, the difference in the elastic coefficients between the outer spring 4081 and the inner spring 4082 also enables the spring 408 to exhibit a more delicate and precise response when subjected to external forces of different magnitudes. When the external force is small, mainly the outer spring 4081 deforms to provide protection for the inner spring 4082; when the external force increases, the inner spring 4082 begins to play a role and provides a greater restoring force. This characteristic of hierarchical response enables the grasping mechanism 4 to more precisely control the clamping force when grasping PCB boards 100 of different sizes and weights, avoiding damage to the circuit boards. Therefore, for the spring 408 that needs to undergo high-frequency deformation, bending, and stretching, this combined design of the outer spring 4081 and the inner spring 4082 can significantly improve its durability. The outer spring 4081, as a flexible framework, absorbs a part of the energy and impact, reducing the burden on the inner spring 4082; at the same time, the outer spring 4081 provides stable support for the inner spring 4082 to prevent it from deforming or breaking under high-frequency deformation. This design not only extends the service life of the spring 408, but also improves the overall performance and reliability of the grasping mechanism 4, ensuring the efficient and stable operation of the PCB board batch detection table.

[0054] This specific embodiment is only an explanation of the present invention and is not a limitation thereof. Those skilled in the art can make modifications without creative contributions to this embodiment as needed after reading this specification, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A batch detection platform for PCB circuit boards, comprising an equipment platform (1), characterized in that: On the equipment platform (1), there is a conveyor belt (2) for transporting the PCB circuit board (100), a turntable (3) driven by a motor to rotate, and detection equipment arranged around the turntable (3) for detecting the PCB circuit board (100); The turntable (3) is arranged above the conveyor belt (2), the vertical projection of the edge part of the turntable (3) always hits the conveyor belt (2), and a plurality of openings (301) are arranged in a circular array at the edge part of the turntable (3), and a grasping mechanism (4) is arranged at each opening (301); The grasping mechanism (4) includes a mounting frame (401), a micro motor (402) arranged on the mounting frame (401), and a flipping column (404) connected to the power output end of the micro motor (402) through a rotating shaft (403). On one side of the flipping column (404), a first electric telescopic rod (405) and a second electric telescopic rod (409) are arranged side by side. The movable end of the first electric telescopic rod (405) is fixedly connected with a first bearing plate (406), and the movable end of the second electric telescopic rod (409) is horizontally and translationally movably connected with a second bearing plate (410). A spring (408) is connected between the first bearing plate (406) and the second bearing plate (410). Elastic first grasping ridges (407) and second grasping ridges (411) are respectively arranged on the sides of the first bearing plate (406) and the second bearing plate (410) away from each other, and the PCB circuit board (100) can be interference-fitted between the first grasping ridges (407) and the second grasping ridges (411); Among them, through the movement of the conveyor belt (2) and the cooperation of the first electric telescopic rod (405) and the second electric telescopic rod (409), the opening and closing action of the grasping mechanism (4) is realized to grasp, place and flip the PCB circuit board (100) for detection.

2. The batch detection table for PCB circuit boards according to claim 1, wherein: The detection equipment includes an X-ray detector (5), an automatic optical inspection device (6), and an in-circuit tester (7), and the X-ray detector (5), the automatic optical inspection device (6), and the in-circuit tester (7) are arranged in sequence along the rotation direction of the turntable (3).

3. The batch detection table for a PCB circuit board according to claim 1, characterized in that: The ends of the first grasping ridges (407) and the second grasping ridges (411) are bent towards the direction of mutual approach to jointly form a clamping space.

4. The batch detection table for a PCB circuit board according to claim 1, wherein: Anti-slip patterns are arranged on the sides of the first grasping ridges (407) and the second grasping ridges (411) in contact with the PCB circuit board (100).

5. The batch detection table for a PCB circuit board according to claim 1, wherein: The materials of the first grasping ridges (407) and the second grasping ridges (411) are both high molecular materials.

6. The batch detection platform for PCB circuit boards according to claim 1, characterized in that: The springs (408) connected between the first bearing plate (406) and the second bearing plate (410) are arranged in multiple rows.

7. A batch inspection table for PCB circuit boards according to claim 1, characterized in that: It further includes an automatic control system, which is electrically connected to the conveyor belt (2), the motor, the micro-motor (402), the first electric telescopic rod (405), the second electric telescopic rod (409), and the detection device, and is used to control the automatic operation of the entire PCB circuit board batch detection table.

8. A batch detection table for PCB circuit boards according to claim 1, characterized in that: The spring (408) includes an outer spring (4081) and an inner spring (4082) coaxially arranged inside the outer spring (4081), and the elastic coefficient of the outer spring (4081) is less than that of the inner spring (4082).

Images