Automatic visual inspection equipment

Abstract

The invention discloses an automatic visual inspection device which comprises a carrier conveying module, the carrier conveying module comprises a base, and two belt conveyors are arranged on the base. According to the invention, firstly, the detection efficiency is high, continuous automatic circulation of carrier conveying, positioning, detection and release outflow is realized through an assembly line work mode, manual intervention is not needed, the detection speed is far higher than that of traditional manual visual inspection and single-station detection equipment, and the production bottleneck is effectively broken through; secondly, the detection precision and consistency are excellent, the problems of misjudgment and missed judgment caused by subjective errors and fatigue of manual detection are thoroughly avoided by virtue of an accurate mechanical positioning structure and a full-automatic visual detection process, and the product yield is greatly improved; the three high flexibility and expandability are prominent, each core module can be rapidly adjusted and adapted according to the product specification, and the market requirements of rapid iteration and multi-variety production of consumer electronic products can be flexibly met.

Description

Technical Field

[0001] This invention relates to the field of electronic product manufacturing and testing technology, and in particular to an automatic visual inspection device. Background Technology

[0002] In the manufacturing process of consumer electronics products, the built-in microphone is a core acoustic component, and its quality directly affects the audio performance of the final product. Therefore, it needs to undergo rigorous visual inspection. Visual inspection mainly includes checking whether the microphone housing has scratches, deformation, missing parts, or whether the pins are bent, oxidized, or have other defects.

[0003] Currently, the testing methods for built-in microphones in consumer electronics products mainly rely on two technical solutions: one is manual visual inspection, in which inspectors use simple tools such as magnifying glasses to observe each microphone one by one; the other is single-station testing equipment, which uses a single testing station to locate and test the microphone, and after the test is completed, the workpiece needs to be manually transferred to the next process.

[0004] However, existing detection methods have many defects and shortcomings, as follows: 1. Low efficiency: On the one hand, manual inspection relies on the operator's skill and visual judgment speed. The inspection of a single piece takes a long time, which is difficult to adapt to the pace of mass production of consumer electronics products and can easily become a bottleneck in the entire production process. On the other hand, single-station inspection equipment cannot realize continuous flow operation of workpieces. The loading, inspection and unloading of workpieces must be completed independently step by step. The process connection is cumbersome and the overall inspection efficiency is low. 2. Inconsistent accuracy: Manual inspection is greatly affected by the subjective factors and physiological state of the inspectors. After working for a long time, problems such as visual fatigue and lack of concentration are likely to occur, leading to misjudgment or omission of minor defects. It is also difficult to completely unify the inspection standards among different inspectors, resulting in poor consistency of inspection results. While some single-station inspection equipment eliminates subjective human judgment, the lack of a stable positioning mechanism can cause deviations in the workpiece inspection posture, which can also affect the inspection accuracy. 3. Poor flexibility: Most existing single-station testing equipment has an integrated structure, and the size and position of its positioning mechanism and testing mechanism are relatively fixed. It is difficult to quickly adapt to the testing needs of different models and sizes of built-in microphones. When it is necessary to switch the testing product model, large-scale mechanical structure modification and parameter debugging of the equipment are required. The changeover cycle is long and the cost is high, which cannot meet the market demand of rapid iteration and multi-variety small-batch production of consumer electronics products. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned above by providing an automatic visual inspection device that enables continuous assembly line operation, stable inspection accuracy, and strong adaptability.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an automatic visual inspection device, comprising: The vehicle conveying module includes a base with two belt conveyors mounted on it. The base also includes a telescopic baffle assembly and a pushing assembly located between the two belt conveyors. The telescopic baffle assembly consists of a first telescopic cylinder and a baffle that moves up and down driven by the first telescopic cylinder. The pushing assembly is used to push the vehicle towards the baffle. The vehicle conveying module also includes multiple side clamping and fixing assemblies located on top of each belt conveyor. Each side clamping and fixing assembly consists of a second telescopic cylinder and a clamping block that moves towards or away from the pushing assembly driven by the second telescopic cylinder. The visual inspection module consists of at least one camera component and a z-axis linear module that drives the camera component to move up and down.

[0007] Furthermore, it also includes an adjustment module for adjusting the position of the vehicle transport module, the adjustment module consisting of a rotating platform for driving the vehicle transport module to rotate and an xy-axis linear module for driving the rotating platform to move along the xy-axis.

[0008] Furthermore, the pushing assembly includes a pushing linear module mounted on the base. A rotating plate is rotatably mounted on the slider of the pushing linear module via a torsion spring. Two spring pins are respectively provided on both sides of the rotating plate near the belt conveyor. The pushing assembly also includes two side plates mounted on the base. The pushing linear module is located between the two side plates. A strip-shaped opening groove is provided on the side plate. The opening side of the strip-shaped opening groove is located on the side of the side plate near the input direction of the carrier. A protrusion section is provided on the side of the side plate near the pushing linear module, located above the strip-shaped opening groove. The upper and lower sides of the protrusion section are inclined surfaces. When the torsion spring is in its natural state, the spring pin abuts against the upper side of the protrusion section, and the top height of the rotating plate is higher than the height of the carrier. The spring force of the spring pin is greater than the torsion force of the torsion spring. When the rotating plate is pushed and flipped by the carrier, the spring pin that moves to the lower side of the protrusion section can drive the carrier to continue to flip downward under the spring's restoring force until the spring pin is engaged in the strip-shaped opening groove.

[0009] Furthermore, the carrier conveying module also includes two movable plates and a drive component that drives the two movable plates to move closer to or further away from the push component, with the two belt conveyors respectively installed on opposite sides of the two movable plates.

[0010] Furthermore, the base is respectively equipped with a feed sensor, a tray position sensor, and a blocking cylinder sensor located between the two belt conveyors.

[0011] Furthermore, the visual inspection module also includes a light source assembly corresponding to the camera component, and the light source assembly is fixedly connected to the sliding part of the z-axis linear module through a connector.

[0012] Furthermore, a pressure sensor is also provided between the output end of the second telescopic cylinder and the clamping block to detect the clamping pressure of the clamping block on the carrier in real time.

[0013] The beneficial effects of this invention are reflected in: This invention offers several advantages. First, it boasts high testing efficiency. Through a streamlined operation mode, it achieves a continuous, automated cycle of carrier transport, positioning, testing, and release, eliminating the need for manual intervention. The testing speed far surpasses traditional manual visual inspection and single-station testing equipment, effectively overcoming production bottlenecks. Second, it exhibits excellent testing accuracy and consistency. Relying on a precise mechanical positioning structure and a fully automated visual inspection process, it completely avoids the subjective errors and fatigue-induced misjudgments and missed detections caused by manual inspection, significantly improving product yield. Third, it demonstrates outstanding flexibility and scalability. Each core module can be quickly adjusted and adapted according to product specifications, flexibly responding to the market demands of rapid iteration and multi-variety production in consumer electronics. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present invention; Figure 2 This is a structural view of the visual inspection module of the present invention; Figure 3 This is a structural view of the vehicle transport module and adjustment module of the present invention; Figure 4 This is a structural view of the vehicle transport module of the present invention; Figure 5 for Figure 4 A magnified view of a portion at point A shown; Figure 6 This is a schematic diagram illustrating the operation of the component driving the present invention.

[0015] In the picture: 1. Carrier conveyor module; 11. Base; 12. Belt conveyor; 13. Telescopic stop assembly; 14. Pushing assembly; 141. Pushing linear module; 142. Turning plate; 143. Spring pin; 144. Side plate; 15. Side clamp fixing assembly; 16. Movable plate; 17. Drive component; 2. Visual inspection module; 21. Camera component; 22. Z-axis linear module; 23. Light source assembly; 3. Adjustment module; 31. Rotating platform; 32. XY axis linear module. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1-6 This invention discloses an automatic visual inspection device, comprising: The vehicle conveying module 1 includes a base 11, on which two belt conveyors 12 are mounted. The base 11 also includes a telescopic baffle assembly 13 and a pushing assembly 14 located between the two belt conveyors 12. The telescopic baffle assembly 13 consists of a first telescopic cylinder and a baffle that moves up and down driven by the first telescopic cylinder. The pushing assembly 14 is used to push the vehicle to move closer to the baffle. The vehicle conveying module 1 also includes multiple side clamping and fixing assemblies 15 located on the top of each belt conveyor 12. The side clamping and fixing assemblies 15 consist of a second telescopic cylinder and a clamping block that moves closer to or away from the pushing assembly 14 driven by the second telescopic cylinder. The visual inspection module 2 consists of at least one camera component 21 and a z-axis linear module 22 that drives the camera component 21 to move up and down.

[0018] This invention involves workers placing a carrier containing a built-in microphone from a consumer electronics product onto a belt conveyor 12. Two symmetrically arranged belt conveyors 12 synchronously transport the carrier. When the carrier reaches a designated position, the first telescopic cylinder of the telescopic stop assembly 13 drives the baffle to rise, creating a limit stop on the carrier and preventing further transport. Subsequently, the push assembly 14 is activated, pushing the carrier towards the baffle to ensure precise contact and initial positioning. After the carrier is positioned, the side clamping fixing assemblies 15 at the top of each belt conveyor 12 are activated, and the second telescopic cylinder drives the clamping blocks to move closer to the carrier, clamping it from both sides. The device is clamped and fixed to ensure the stability of the device's posture during the inspection process. After the device is fixed, the vision inspection module 2 is activated. The system controls the z-axis linear module 22 to drive the camera component 21 to move up and down according to the inspection requirements, adjusting it to the optimal inspection height. Then, the camera component 21 acquires high-definition images of the microphone's appearance features on the device. Once the acquisition is complete, the inspection process is finished. After the inspection is completed, the side clamping component 15, the pushing component 14, and the telescopic stop component 13 are reset in sequence. The belt conveyor 12 drives the device to output, realizing automated device transportation and vision inspection in tandem, improving inspection efficiency and positioning stability.

[0019] In one embodiment, it also includes an adjustment module 3 for adjusting the position of the vehicle transport module 1. The adjustment module 3 consists of a rotating platform 31 that drives the vehicle transport module 1 to rotate and adjust, and an xy-axis linear module 32 that drives the rotating platform 31 to move along the xy-axis.

[0020] This design allows for angle calibration of the carrier conveying module 1 via the rotating platform 31, and, in conjunction with the planar position adjustment of the xy-axis linear module 32, multi-dimensional position adjustment of the carrier conveying module 1 can be achieved, ensuring its docking accuracy with preceding or subsequent processes and improving the overall collaborative work efficiency of the equipment.

[0021] In one embodiment, the pushing assembly 14 includes a pushing linear module 141 disposed on the base 11. A rotating plate 142 is rotatably disposed on the slider of the pushing linear module 141 via a torsion spring. Two spring pins 143 are respectively disposed on both sides of the rotating plate 142 near the belt conveyor 12. The pushing assembly 14 also includes two side plates 144 disposed on the base 11. The pushing linear module 141 is located between the two side plates 144. A strip-shaped opening slot is provided on the side plate 144, and the opening side of the strip-shaped opening slot is located on the side of the side plate 144 near the input direction of the carrier. The side plate 144 is provided with a raised section above the strip-shaped opening groove on the side near the push linear module 141. Both the upper and lower sides of the raised section are inclined surfaces. When the torsion spring is in its natural state, the spring pin 143 abuts against the upper side of the raised section and the top height of the rotating plate 142 is higher than the height of the vehicle. The spring force of the spring pin 143 is greater than the torsion force of the torsion spring. When the rotating plate 142 is pushed and flipped by the vehicle, the spring pin 143, which moves to the lower side of the raised section, can drive the vehicle to continue to flip downward under the spring return force until the spring pin 143 is inserted into the strip-shaped opening groove.

[0022] This design involves manually rotating and pressing down the rotating plate 142, causing the spring pin 143 to engage with the slotted opening. Once the vehicle moves to contact the extended baffle, the linear module 141 is pushed, causing the rotating plate 142 to move along the slotted opening until the spring pin 143 moves out of the slot. At this point, the rotating plate 142 flips back to its original position under the action of the torsion spring. Then, the linear module 141 is pushed, causing the rotating plate 142 to move closer to the baffle. When the rotating plate 142 comes into contact with the vehicle, its continued movement pushes the vehicle tightly against the baffle. Lateral positioning is then achieved through the side clamping fixing assembly 15, thus ensuring precise positioning. In the positioning of the four sides of the vehicle, during the above process, when the vehicle can no longer move, the rotating plate 142 that continues to move will flip over, causing the spring pin 143 to be pushed into the strip-shaped opening groove by the inclined surface of the protruding section. This allows the rotating plate 142 to continue moving under the vehicle without interfering with it, until it moves out of the opening side of the strip-shaped opening groove again. By adopting the above operation, the automatic reset, push positioning and avoidance of interference of the rotating plate are realized. Multiple action switching can be completed without additional drive components, which effectively improves the accuracy and automation of vehicle positioning, while avoiding collision damage between equipment components and extending the service life of the equipment.

[0023] In one embodiment, the vehicle conveying module 1 further includes two movable plates 16 and a drive component 17 for driving the two movable plates 16 to move toward or away from the push component 14, and two belt conveyors 12 are respectively installed on opposite sides of the two movable plates 16.

[0024] This design allows the spacing between the two movable plates 16 to be adjusted via the drive component 17, thereby adapting to vehicles of different widths without the need to replace dedicated conveying components, thus improving the versatility of the vehicle conveying module 1 and the flexible production capacity of the equipment.

[0025] In one embodiment, the base 11 is respectively provided with a feed sensor, a tray position sensor and a blocking cylinder sensor located between the two belt conveyors 12.

[0026] This design allows for real-time monitoring of the carrier's feeding status, the tray's positioning status, and the blocking cylinder's working status using multiple sensors. This enables full-process monitoring of the carrier's transport, timely detection and avoidance of process connection errors, and ensures the continuity of the production process.

[0027] In one embodiment, the visual inspection module 2 further includes a light source assembly 23 corresponding to the camera component 21, and the light source assembly 23 is fixedly connected to the sliding part of the z-axis linear module 22 via a connector.

[0028] With this design, the light source component 23 can move synchronously with the sliding part of the z-axis linear module 22, ensuring that the relative position of the light source and the camera component 21 remains fixed, avoiding the effect of light illumination due to positional deviation, and improving the light stability and detection accuracy of visual inspection.

[0029] In one embodiment, a pressure sensor is also provided between the output end of the second telescopic cylinder and the clamping block to detect the clamping pressure of the clamping block on the carrier in real time.

[0030] This design allows for real-time monitoring of clamping pressure via a pressure sensor, preventing damage to the carrier due to excessive pressure or inadequate clamping due to insufficient pressure. This enhances the safety and stability of the clamping process and ensures the positioning accuracy of the carrier in subsequent processes.

[0031] It should be noted that the signals from the above sensors can be connected to the equipment's control system to achieve linkage control between the sensors and actuators such as drive components and cylinders; the detection data from the pressure sensor can be fed back to the control system in real time, making it easy to adjust the output pressure of the second telescopic cylinder according to actual needs.

[0032] In specific implementation, the drive component 17 can be a bidirectional screw slide or a double cylinder linkage structure to achieve synchronous movement of the two movable plates 16 and ensure the spacing adjustment accuracy of the belt conveyor 12.

[0033] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0035] Additionally, "multiple" refers to two or more.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic visual inspection device, characterized in that, include: The vehicle conveying module (1) includes a base (11), on which two belt conveyors (12) are provided. The base (11) also includes a telescopic baffle assembly (13) and a push assembly (14) located between the two belt conveyors (12). The telescopic baffle assembly (13) consists of a first telescopic cylinder and a baffle that moves up and down driven by the first telescopic cylinder. The push assembly (14) is used to push the vehicle to move closer to the baffle. The vehicle conveying module (1) also includes multiple side clamping and fixing assemblies (15) located on the top of each belt conveyor (12). The side clamping and fixing assembly (15) consists of a second telescopic cylinder and a clamping block that moves closer to or away from the push assembly (14) driven by the second telescopic cylinder. The visual inspection module (2) consists of at least one camera component (21) and a z-axis linear module (22) that drives the camera component (21) to move up and down.

2. The automatic visual inspection device according to claim 1, characterized in that: It also includes an adjustment module (3) for adjusting the position of the vehicle transport module (1), the adjustment module (3) consisting of a rotating platform (31) for adjusting the rotation of the vehicle transport module (1) and an xy-axis linear module (32) for moving the xy-axis of the rotating platform (31).

3. The automatic visual inspection device according to claim 1, characterized in that: The pushing assembly (14) includes a pushing linear module (141) mounted on the base (11). A rotating plate (142) is rotatably mounted on the slider of the pushing linear module (141) via a torsion spring. Two spring pins (143) are respectively provided on both sides of the rotating plate (142) near the belt conveyor (12). The pushing assembly (14) also includes two side plates (144) mounted on the base (11). The pushing linear module (141) is located between the two side plates (144). A strip-shaped opening groove is provided on the side plate (144). The opening side of the strip-shaped opening groove is located on the side plate (144) near the carrier conveyor. On one side of the inlet direction, the side plate (144) near the push linear module (141) is provided with a protrusion above the strip-shaped opening groove. The upper and lower sides of the protrusion are inclined surfaces. When the torsion spring is in its natural state, the spring pin (143) abuts against the upper side of the protrusion and the top height of the rotating plate (142) is higher than the height of the vehicle. The spring force of the spring pin (143) is greater than the torsion force of the torsion spring. When the rotating plate (142) is pushed and flipped by the vehicle, the spring pin (143) that moves to the lower side of the protrusion can drive the vehicle to continue to flip downward under the spring restoring force until the spring pin (143) is inserted into the strip-shaped opening groove.

4. The automatic visual inspection device according to claim 1, characterized in that: The vehicle transport module (1) also includes two movable plates (16) and a drive component (17) for driving the two movable plates (16) to move closer to or further away from the push assembly (14). The two belt conveyors (12) are respectively installed on opposite sides of the two movable plates (16).

5. The automatic visual inspection device according to claim 1, characterized in that: The base (11) is respectively equipped with a feed sensor, a tray position sensor and a blocking cylinder sensor located between the two belt conveyors (12).

6. The automatic visual inspection device according to claim 1, characterized in that: The visual inspection module (2) also includes a light source assembly (23) corresponding to the camera component (21), and the light source assembly (23) is fixedly connected to the sliding part of the z-axis linear module (22) through a connector.

7. The automatic visual inspection device according to claim 1, characterized in that: A pressure sensor is also provided between the output end of the second telescopic cylinder and the clamping block to detect the clamping pressure of the clamping block on the carrier in real time.

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