Shell defect detection device of Bluetooth noise reduction intelligent earphone

Abstract

The invention relates to the technical field of appearance defect detection based on visual inspection, in particular to a shell defect detection device of a Bluetooth noise reduction intelligent earphone, which comprises a workbench, a conveying device and a visual inspection device are arranged on the workbench, and a driving assembly is arranged on the workbench and right below the visual inspection device. An overturning system is arranged on the driving assembly; the overturning system comprises a rotating disc located under the visual detection device, an outer ring and an inner ring are arranged at the concentric position of the rotating disc on the mounting frame, and a detection area is formed between the outer ring and the inner ring; the detection area is divided into a front surface detection part, a first overturning part, a back surface detection area, a second overturning part, a side surface detection part and a retreating part in sequence from the three o'clock direction along the anticlockwise direction; by constructing an annular continuous motion path and combining flexible driving, structured attitude transformation and a self-adaptive overturning mechanism, detection of the front and back surfaces and the circumferential side surfaces of the shell of the cake-shaped Bluetooth earphone is realized in a limited view field of a visual detection device.

Description

Technical Field

[0001] This invention relates to the field of visual inspection-based appearance defect detection technology, and more specifically, to a device for detecting defects in the shell of Bluetooth noise-canceling smart headphones. Background Technology

[0002] With the development of intelligent manufacturing, machine vision technology has been widely applied in the field of industrial automation. Especially in quality control, machine vision systems, with their non-contact, high-speed, and high-precision characteristics, have become an ideal alternative to traditional manual inspection. They can accurately analyze the appearance of products, identify various types of surface and structural defects, thereby ensuring the consistency and reliability of product quality. A vision inspection system mainly includes the following core components: Imaging equipment: High-resolution industrial cameras are key tools for acquiring product images, capable of capturing minute details; Lighting system: A suitable light source configuration (such as ring light, coaxial light, backlight, etc.) is crucial for highlighting product surface features, and it can help improve the detectability of defects; Image processing unit: Utilizes advanced algorithms to analyze the acquired image data in order to identify and classify different defect types; For precision electronic products like disc-shaped Bluetooth noise-canceling smart headphones, the casing not only needs to have an aesthetically pleasing design, but also needs to meet high-quality standards; this includes, but is not limited to, the absence of defects such as scratches, dents, and stains on the surface, as well as the absence of burrs and gaps on the edges. When performing defect inspection on the appearance of disc-shaped Bluetooth earphones using visual inspection equipment, the special structure of the product requires comprehensive inspection of the front, back, and sides of the earphones. However, existing inspection equipment, with its limited field of view, struggles to integrate an efficient and stable flipping mechanism, making it impossible to reliably switch between the front and back of the product and perform multi-angle circumferential positioning during a single clamping or continuous transport process. As a result, blind spots are common, making it difficult to meet the demand for comprehensive, full-surface automated appearance inspection of such complex three-dimensional curved shells.

[0003] Based on this, the present invention discloses a device for detecting defects in the shell of Bluetooth noise-canceling smart headphones. Summary of the Invention

[0004] To address the problem mentioned in the background art that, due to the unique structure of disc-shaped Bluetooth earphones, existing visual inspection equipment is limited by the imaging field of view and the integration difficulty of the flipping mechanism, making it difficult to achieve complete positioning of the front, back, and circumferential sides in a single inspection process, resulting in blind spots and failing to meet the requirement of full-surface automated inspection of its complex three-dimensional curved shell, this invention provides a shell defect detection device for Bluetooth noise-canceling smart earphones. The device includes a worktable, a conveying device mounted on the worktable, and a visual inspection device mounted above the conveying device on the worktable. Several sets of mounting frames are arranged on both sides of the conveying device on the worktable, and each mounting frame is equipped with a driving component, a first conveying component, and a second conveying component. The driving component is equipped with a flipping system. Since the detection area of ​​the visual inspection device is within a specified range, the product is flipped in front, back and side within the specified range. Therefore, the present invention adopts the method of rotating the product. During the rotation process, this path is divided into the process of front detection, front flip, back detection, side flip, side detection and unloading. As a further improvement to this technical solution, the flipping system includes a rotating disk located directly below the visual inspection device. An outer ring and an inner ring are arranged concentrically on the mounting frame at the rotating disk, forming a detection area between the outer ring and the inner ring. The detection area is divided into a front detection section, a first flipping section, a reverse detection area, a second flipping section, a side detection section, and an exit section in a counterclockwise direction starting from the three o'clock position. A first conveying component is arranged facing the front detection section and conveys upwards, while a second conveying component is arranged facing the exit section and conveys downwards.

[0005] As a further improvement to this technical solution, in order to drive the product to move along the annular detection area after it enters the detection area, the present invention employs a drive assembly including a drive motor fixed on a mounting frame, a reduction gear fixed on the output end of the drive motor, a support rod fixed between the mounting frames, a rotating gear rotatably connected to the support rod, and the rotating gear meshing with the reduction gear; there is a gap between the support rod and the conveying device through which the product can pass; secondly, the rotating disk is fixed on the rotating gear, and the rotating disk is made of rubber; several sets of push rods are circumferentially fixed on the rotating disk along the central ring line of the detection area, and the push rods are made of rubber.

[0006] Based on this, in order to smoothly lift the product and enter the inspection area, frontal inspection will begin simultaneously; As a further improvement to this technical solution, the front detection section includes a feed inlet on the outer ring, and the detection area between the feed inlet and the first flipping section is set as the front detection area; the first conveying assembly includes a first conveying section fixed on the mounting frame, a third connecting plate fixed at the bottom of the first conveying section and connected to the surface of the conveying device, the first conveying section is inclined, a second conveying section is horizontally arranged at the top of the first conveying section, a first connecting plate is fixed at one end of the second conveying section near the feed inlet, and the second conveying section is connected to the front detection area through the first connecting plate; a gathering plate is provided at the front end of the third connecting plate, the gathering plate is fixed on the mounting frame, and the gathering plate has a conical structure, with the narrower end of the gathering plate adapted to the third connecting plate, and the wider end of the gathering plate adapted to the width of the conveying device.

[0007] In another approach, to enable the product to be successfully flipped over for inspection of the other side after one side has been inspected, without the need for clamping, external force, or even the operation of a robotic arm; As a further improvement to this technical solution, the first flipping part includes flipping structures relatively disposed within the detection area. The flipping structures include a first wedge plate, a second wedge plate, and a concave plate arranged sequentially and smoothly connected to each other. Specifically, the two flipping structures are respectively adapted to the inner ring of the outer ring and the outer ring of the inner ring, and the inclination angle of the first wedge plate is smaller than the inclination angle of the second wedge plate. The concave plate is located at the bottom of the second wedge plate, and the groove of the concave plate is adapted to the width of the product. A stop bar is provided in front of the inclined surface of the first wedge plate, and the two stop bars are respectively fixed on the outer ring and the inner ring. The bottom of the stop bar has an arc structure. The height of the stop bar is higher than the height of the product. There is an opening between the two flipping structures.

[0008] In another approach, after the front and back of the product have been inspected, the outer perimeter of the product still needs to be inspected. Therefore, in order to expose the outer perimeter of the product to the field of view of the visual inspection device for defect detection, the product should first be changed from a flat state to a vertical state. As a further improvement to this technical solution, the second flipping part includes a third wedge plate and a pressing plate disposed opposite to each other in the detection area. The top of the inclined surface of the third wedge plate is flush with the top of the pressing plate. The width of the pressing plate gradually increases along the product movement direction, and the front end of the pressing plate is located behind the front end of the third wedge plate. The opening between the third wedge plate and the pressing plate gradually narrows, and the end of the opening between the third wedge plate and the pressing plate is adapted to the width of the product.

[0009] Based on this, in order to enable the product to move forward by continuous rotation in a vertical position, the outer perimeter of the product will be continuously rotated, thereby facilitating the detection of defects on the outer perimeter of the product. As a further improvement to this technical solution, the side detection section includes two annular baffles arranged opposite each other in the detection area, forming a flip groove between the annular baffles. The front end of the flip groove is connected to the end of the opening between the third wedge plate and the extrusion plate, and the width of the flip groove is adapted to the width of the end of the opening between the third wedge plate and the extrusion plate. Several rubber protrusions are uniformly fixed on the top of the opposite side of the two annular baffles, and the arc corresponding to the flip groove is sufficient for the product to roll and rotate at least once within it.

[0010] Based on this, after the product completes a series of tests, in order to allow the product to return to the conveyor device for the next product to be tested, and at the same time allow the tested product to continue to be transported to the designated location. As a further improvement to this technical solution, the exit section includes a discharge port on the outer ring, a guide plate is provided on the discharge port, the guide plate has an arc-shaped structure, one end of the guide plate is connected to the end of the discharge port near the front detection section, and the other end of the guide plate is provided near the end of the annular baffle and is fixedly connected to the outer ring of the inner ring; the second conveying assembly includes a third conveying section fixed on the mounting frame, the third conveying section is inclined, and there is a gap between the bottom of the inclined angle of the third conveying section and the conveying device, a baffle plate is provided in front of the bottom of the third conveying section, the baffle plate is fixed on the mounting frame, a horizontally arranged fourth conveying section is provided at the top of the third conveying section, a second connecting plate is fixed at the end of the fourth conveying section near the discharge port, the fourth conveying section is connected to the discharge port through the second connecting plate, and heightening structures for preventing products from falling are provided on both sides of the fourth conveying section.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this Bluetooth noise-canceling smart headphone shell defect detection device, by setting up a ring detection path and a rotary drive mechanism to work together, and with the help of a flexible push structure, the product is continuously transported in a ring within the fixed field of view of the visual inspection device. This facilitates the completion of the full-process motion positioning of the front and back sides and circumferential sides of the product without the need for a robotic arm or multi-station clamping, and makes it easier to eliminate blind spots in the detection. This enables full-surface, integrated automatic detection of the three-dimensional curved surface of the disc-shaped headphone shell, effectively solving the problem of incomplete detection caused by the limited field of view and the difficulty in integrating the flipping mechanism in the existing technology.

[0012] 2. In this Bluetooth noise-canceling smart earphone shell defect detection device, a flipping structure combining multi-level wedge-shaped guidance, elastic stop bar and concave limit is set. The automatic flipping is achieved by utilizing the product's motion inertia and the natural guidance of the mechanical path. This facilitates the switching of front and back postures without additional power clamping, simplifies the equipment structure, reduces the failure rate, and thus achieves safe, stable and low-cost double-sided appearance defect detection, improving the system's reliability and maintainability.

[0013] 3. In this Bluetooth noise-canceling smart earphone shell defect detection device, by setting a gradient extrusion guide structure and a long arc-shaped flipping groove, the product can be smoothly converted from a horizontal to a vertical posture and the circumferential rotation detection can be achieved. This is conducive to the product continuously rolling more than one revolution during the forward movement, which makes it easier for the vision system to fully capture side details, thereby completing a 360° no-dead-angle imaging analysis of the outer curved surface of the earphone, ensuring a high detection rate of complex edge and side defects. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the disc-shaped Bluetooth headset of the present invention; Figure 3 This is a top view of the structure of the first transmission component of the present invention; Figure 4 This is a schematic diagram of the structure of the first transmission component of the present invention; Figure 5 This is a schematic diagram of the structure of the driving component of the present invention; Figure 6 This is one of the working area diagrams of the flipping system of the present invention; Figure 7 This is a second diagram of the working area of ​​the flipping system of the present invention; Figure 8 This is a schematic diagram of the flipping system of the present invention; Figure 9 This is a schematic diagram of the structure of the first flipping part of the present invention; Figure 10 This is a schematic diagram showing the state of the first flipping part of the present invention; Figure 11 This is one of the structural schematic diagrams of the second flipping part of the present invention; Figure 12 This is a schematic diagram of the structure of the exit section of the present invention; Figure 13 This is a second schematic diagram of the structure of the second flipping part of the present invention; Figure 14 This is a force analysis diagram of the product of the present invention located in the tilting groove.

[0015] The meanings of the labels in the diagram are as follows: 1. Workbench; 2. Conveying device; 3. Vision inspection device; 4. Mounting frame; 5. Drive assembly; 6. Tilting system; 7. First conveying assembly; 8. Second conveying assembly; 51. Drive motor; 52. Reduction gear; 53. Rotary gear; 54. Support rod; 61. Rotary disk; 62. Push rod; 63. Outer ring; 64. Inner ring; 65. Front detection section; 66. First flipping section; 67. Reverse detection area; 68. Second flipping section; 69. Side detection section; 70. Exit section; 651. Feed inlet; 652. First connecting plate; 653. Front inspection area; 661. First wedge plate; 662. Second wedge plate; 663. Concave plate; 664. Stop bar; 681. Third wedge plate; 682. Extrusion plate; 691. Annular baffle; 692. Tilting groove; 701. Discharge port; 702. Second connecting plate; 703. Guide plate; 71. First conveyor section; 72. Second conveyor section; 73. Third connecting plate; 74. Gathering plate; 81. Third Transmission Section; 82. Fourth Transmission Section; 83. Baffle Plate. 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 some embodiments of the present invention, and not all embodiments. 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] Due to the unique structure of the disc-shaped Bluetooth headset, existing visual inspection equipment is limited by the difficulty of integrating the imaging field of view and the flipping mechanism. It is difficult to achieve complete positioning of the front, back and circumferential sides in a single inspection process, resulting in blind spots and failing to meet the full-surface automated inspection requirements of its complex three-dimensional curved shell.

[0018] Therefore, the present invention provides a device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones, see [link to relevant documentation]. Figures 1-3 As shown, it includes a workbench 1, a conveying device 2 is provided on the workbench 1, and a vision inspection device 3 is provided on the workbench 1 above the conveying device 2; several sets of mounting frames 4 are provided on both sides of the conveying device 2 on the workbench 1, and a drive assembly 5, a first conveying assembly 7 and a second conveying assembly 8 are provided on the mounting frames 4, and a flipping system 6 is provided on the drive assembly 5.

[0019] When working, will be as follows Figure 2 The disc-shaped products shown are placed one by one onto the conveyor 2. The products then enter the first conveyor assembly 7 via the conveyor 2, and are sent to the flipping system 6 via the first conveyor assembly 7. On the flipping system 6, the products are flipped in the field of vision of the vision inspection device 3, both front and back, as well as side flipping. During this process, the vision inspection device 3 continuously performs visual inspection on the appearance defects of the products. After inspection, the products are sent back to the conveyor 2 via the second conveyor assembly 8, and then transferred to the designated position. For defective products, the vision inspection device 3 will display the defective products according to the order of the products sent in. The defective products can be recycled at the rear of the conveyor 2.

[0020] For details, see Figures 4-8 As shown, since the detection area of ​​the vision inspection device 3 has a specified range, the product is flipped in front, back and side within the specified range. Therefore, the present invention adopts the method of rotating the product. During the rotation process, this path is divided into the process of front detection, front flip, back detection, side flip, side detection and unloading. Specifically, the flipping system 6 includes a rotating disk 61 located directly below the vision inspection device 3. An outer ring 63 and an inner ring 64 are arranged concentrically on the mounting frame 4 at the rotating disk 61. A detection area is formed between the outer ring 63 and the inner ring 64. The detection area is divided into a front detection section 65, a first flipping section 66, a back detection area 67, a second flipping section 68, a side detection section 69 and an unloading section 70 in a counterclockwise direction starting from the three o'clock position. The first conveying component 7 is arranged opposite the front detection section 65 and conveys upward, and the second conveying component 8 is arranged opposite the unloading section 70 and conveys downward. In order to drive the product to move along the circular detection area after it enters the detection area, the present invention employs a drive assembly 5 including a drive motor 51 fixed on the mounting frame 4, a reduction gear 52 fixed on the output end of the drive motor 51, a support rod 54 fixed between the mounting frames 4, a rotating gear 53 rotatably connected to the support rod 54, and the rotating gear 53 and the reduction gear 52 meshing with each other; there is a gap between the support rod 54 and the conveying device 2 through which the product can pass; secondly, a rotating disk 61 is fixed on the rotating gear 53, and the rotating disk 61 is made of rubber; several sets of push rods 62 are circumferentially fixed on the rotating disk 61 on the central ring line of the detection area, and the push rods 62 are made of rubber. During work, firstly by Figure 6 and Figure 7As can be seen, the front detection section 65 is located between ab in the annular detection area, the first flipping section 66 is located between bc in the annular detection area, the reverse detection section 67 is located between cd in the annular detection area, the second flipping section 68 is located between de in the annular detection area, the side detection section 69 is located between ef in the annular detection area, and the exit section 70 is located between fa in the annular detection area. This completes a circular closed loop. The process of front detection, front flipping, reverse detection, side flipping, side detection, and material discharge is realized in this circular motion trajectory. At the same time, this motion trajectory is adapted to the field of view of the vision inspection device 3. Therefore, multi-directional flipping and inspection of products can be realized within a limited field of view. At the same time, the stable structural design reduces the later maintenance and development costs. Flipping and inspection can be realized without multiple clamping actions and without the need for high-cost robotic arms. In other words, the drive motor 51 drives the rotating disk 61 to rotate through the reduction gear 52 and the rotating gear 53. After the product enters the annular detection area formed between the outer ring 63 and the inner ring 64 through the first conveying component 7, it first enters the front detection part 65. Then, the rotating gear 53 drives the rotating disk 61 to rotate. The rotation of the rotating disk 61, combined with the pushing of several push rods 62 on the rotating disk 61, allows the product to move along the annular detection area. Since the rotating disk 61 and the push rods 62 are both made of soft rubber with a certain degree of friction, they will not damage the product. At the same time, if there is an obstruction when the push rods 62 push the product, they can bend to avoid it, ensuring that the product enters the detection area and is pushed.

[0021] It is worth mentioning that the bottom of the outer ring 63 is provided with several balls that rotate in a circumferential direction. The outer ring 63 is connected to the rotating disk 61 through the balls. The outer ring 63 and the inner ring 64 are fixedly connected. The outer ring 63 is fixed on the mounting bracket 4. In this way, when the rotating disk 61 is driven by the rotating gear 53 to rotate, the friction between the outer ring 63 and the inner ring 64 on the rotating disk 61 can be reduced.

[0022] Further, see Figures 3-8As shown, to facilitate the smooth lifting of the product into the inspection area and the simultaneous commencement of frontal inspection, the present invention employs a frontal inspection unit 65 including a feed inlet 651 formed on the outer ring 63, with the inspection area between the feed inlet 651 and the first flipping part 66 designated as the frontal inspection area 653; the first conveying assembly 7 includes a first conveying section 71 fixedly mounted on the mounting frame 4, with a third connecting plate 73 fixedly mounted at the bottom of the first conveying section 71 and connected to the surface of the conveying device 2; the first conveying section 71 is inclined. A second conveying section 72 with a horizontal layout is provided at the top of 71. A first connecting plate 652 is fixed at one end of the second conveying section 72 near the feed inlet 651. The second conveying section 72 is connected to the front detection area 653 through the first connecting plate 652. A gathering plate 74 is provided at the front end of the third connecting plate 73. The gathering plate 74 is fixed on the mounting frame 4 and has a conical structure. The narrower end of the gathering plate 74 is adapted to the third connecting plate 73, and the wider end of the gathering plate 74 is adapted to the width of the conveying device 2. During operation, the product enters the first conveyor section 71 through the gathering of the gathering plate 74 and the connection of the third connecting plate 73. It is then lifted and conveyed to the second conveyor section 72, and then conveyed to the front detection area 653 through the first connecting plate 652. If the push rod 62 causes obstruction during this process, the push rod 62 will bend to avoid it. The product entering the front detection area 653 is driven by the friction of the rotating disk 61 and the active push of the push rod 62, which moves the product toward the first flipping section 66. In the front detection area 653, since the product is pushed normally without any other extra structures, and the distance between adjacent push rods 62 is greater than the length of the product, the vision inspection device 3 can perform defect detection on one side of the product at this stage. At the same time, the product will be gradually accelerated when it moves in the front detection area 653, storing energy for the next flipping step.

[0023] Furthermore, see Figures 6-10As shown, to enable the product to be smoothly flipped over for inspection of the other side after one side has been inspected, without clamping, external force, or even the operation of a robotic arm, the present invention employs a first flipping part 66, which includes flipping structures arranged opposite each other within the inspection area. The flipping structures include a first wedge plate 661, a second wedge plate 662, and a concave plate 663 arranged sequentially and smoothly connected to each other. Specifically, the two flipping structures are adapted to the inner ring of the outer ring 63 and the outer ring of the inner ring 64, respectively. The inclination angle of the first wedge plate 661 is smaller than that of the second wedge plate 662. The concave plate 663 is located at the bottom of the second wedge plate 662, and the groove of the concave plate 663 is adapted to the width of the product. A stop bar 664 is provided in front of the inclined surface of the first wedge plate 661. The two stop bars 664 are fixed on the outer ring 63 and the inner ring 64, respectively. The bottom of the stop bar 664 has an arc structure. The height of the stop bar 664 is higher than the height of the product. There is an opening between the two flipping structures. It should be noted that the width of the annular detection area is matched with the width of the product, so the product can be positioned without additional clamping devices. During operation, after the product is accelerated through the front detection area 653, it begins to climb uphill along the first wedge plate 661. For details, please refer to... Figure 10 As shown in the diagram, the dashed line represents the product's movement trajectory, although it actually occurs within a circular detection area. Figure 10 As can be seen from the planar projection, when the product climbs to the top of the slope along the first wedge plate 661 with a lower inclination angle, it continues to climb due to the presence of the push rod 62, and then comes into contact with the stop rod 664. The stop rod 664 has an arc-shaped structure, so it can prevent the product from continuing to climb or falling. Instead, it causes the end of the product to move downward, that is, to fit against the second wedge plate 662. Then the product completes the tilt angle change at the top of the first wedge plate 661. The tops of the first wedge plate 661 and the second wedge plate 662 are smoothly connected, which facilitates the angle flipping of the product. After being blocked by the stop rod 664, the product falls onto the inclined surface of the second wedge plate 662 with a larger inclination angle. Thus, when the product falls into... Once inside the groove of the concave plate 663, the product's tilt angle will be higher. The end of the groove of the concave plate 663 away from the second wedge plate 662 is convex and has a smooth top, which can temporarily limit the product. At this time, due to the high tilt angle of the product, with the help of inertia and the push of the push rod 62, the product will be blocked by the end of the groove of the concave plate 663 away from the second wedge plate 662. The push rod 62 pushes the top of the product and causes it to flip. The flipped product will enter the reverse detection area 67 for inspection on the other side. At the same time, in the reverse detection area 67, it will be further accelerated during the defect detection process, and will accumulate energy for the next side flip.

[0024] Further, see Figures 6-8 , Figure 11 and Figure 13 As shown, after the product has completed the inspection of the front and back sides, the product's perimeter still needs to be inspected. Therefore, in order to expose the perimeter of the product to the field of view of the visual inspection device 3 for defect detection, the product should first be changed from a flat state to a vertical state. Therefore, the present invention adopts a second flipping part 68, which includes a third wedge plate 681 and a pressing plate 682 arranged opposite to each other in the inspection area. The top of the inclined surface of the third wedge plate 681 is flush with the top of the pressing plate 682. The width of the pressing plate 682 gradually increases along the product movement direction, and the front end of the pressing plate 682 is located behind the front end of the third wedge plate 681. The opening between the third wedge plate 681 and the pressing plate 682 gradually narrows, and the end of the opening between the third wedge plate 681 and the pressing plate 682 is adapted to the width of the product. During operation, the product accelerates through the reverse detection zone 67 and enters the second flipping section 68 between de. During this process, the product first contacts the third wedge plate 681. Due to the wedge-shaped inclined surface design of the third wedge plate 681, as the product moves forward, one side of the product gradually tilts due to the lifting effect of the inclined surface of the third wedge plate 681. As the product continues to move forward under the push of the push rod 62 and the rotating disk 61, the other side of the product begins to contact the side of the extrusion plate 682. Since the side of the extrusion plate 682 gradually widens towards the center of the annular detection zone, it gradually squeezes the other side of the product. As the product continues to move forward, one side of the product gradually rises while the other side is gradually squeezed and moves closer to the annular detection zone. When the product reaches the rear end of the third wedge plate 681, the product completes the transition from a horizontal to a vertical state and finally enters the side detection section 69, where defect detection is performed on the outer perimeter of the product.

[0025] Furthermore, see Figures 3-4 , Figures 6-8 and Figure 12 As shown, in order to enable the product to move forward by continuous rotation in a vertical position and achieve continuous flipping of the product's periphery, thereby facilitating the detection of defects around the product's periphery, the present invention employs a side detection unit 69, which includes two annular baffles 691 arranged opposite each other in the detection area. A flipping groove 692 is formed between the annular baffles 691. The front end of the flipping groove 692 is connected to the end of the opening between the third wedge plate 681 and the extrusion plate 682, and the width of the flipping groove 692 is adapted to the width of the end of the opening between the third wedge plate 681 and the extrusion plate 682. Several rubber protrusions are uniformly fixed on the top of the opposite side of the two annular baffles 691, and the arc of the flipping groove 692 is sufficient to allow the product to roll and rotate at least once within it. During operation, the product enters the tilting groove 692 through the openings at the ends of the third wedge plate 681 and the extrusion plate 682. Limited by the two annular baffles 691, the product remains vertical within the tilting groove 692. It should be noted that because the tilting groove 692 has a sufficiently long arc and the product is relatively small, it can move forward within the tilting groove 692. During this process, the product relies on the friction generated by the contact between its top and the rubber protrusions on the annular baffles 691, combined with the thrust generated by the push rod 62, and the friction between the product's own weight and the bottom of the push rod 62, resulting in a rotating forward motion. Figure 14 As shown, during rotation, since the push rod 62 is composed of several vertical rod-like structures, space can be reserved between the push rods 62 in the same group for product rotation, preventing excessive obstruction to the product's self-rotation caused by the rubber protrusions; that is, since the product is not very wide, when the product is in a vertical position, the rod-like structures of the push rod 62 form grooves that enclose the product for pushing, which is as shown. Figure 14 As shown, when the product is in a horizontal position, it can fully exert force on the product's forward movement. With a sufficiently long arc in the tilting groove 692, the product will rotate due to the friction between the rubber protrusions on the top of the product, the friction between the bottom of the product and the rotating disk 61, and the push rod 62 pushing the product's vertical sides. The product will rotate while being pushed forward in the tilting groove 692. Therefore, after the product leaves the tilting groove 692, it can rotate at least once, completing a comprehensive inspection of the product's surrounding area.

[0026] Further, see Figures 3-4 , Figures 6-8 and Figure 12 As shown, after a series of tests are completed, in order to allow the product to return to the conveyor 2 for the next product to be tested, and to allow the tested product to continue to be transported to the designated position, the present invention adopts an exit part 70 including a discharge port 701 opened on the outer ring 63. A guide plate 703 is provided on the discharge port 701. The guide plate 703 has an arc-shaped structure, and one end of the guide plate 703 is connected to the end of the discharge port 701 near the front detection part 65. The other end of the guide plate 703 is provided near the end of the annular baffle 691 and is fixedly connected to the outer ring of the inner ring 64. In addition, the second conveying assembly 8 includes a third conveying section 81 fixed on the mounting frame 4. The third conveying section 81 is inclined and there is a gap between the bottom of the inclined angle of the third conveying section 81 and the conveying device 2. A baffle plate 83 is provided in front of the bottom of the third conveying section 81 and is fixed on the mounting frame 4. A horizontally arranged fourth conveying section 82 is provided at the top of the third conveying section 81. A second connecting plate 702 is fixed at one end of the fourth conveying section 82 near the discharge port 701. The fourth conveying section 82 is connected to the discharge port 701 through the second connecting plate 702. The sides of the fourth conveying section 82 are provided with heightening structures to prevent products from falling. During operation, after the product exits the tilting trough 692, it completes the inspection of its surrounding perimeter. Without the limiting effect of the annular baffle 691, the product falls from a vertical position to a horizontal position. Then, with the push of the push rod 62 and the rotating disk 61, it contacts the guide plate 703. Following this, with the connection of the second connecting plate 702, it is gradually pushed out of the discharge port 701 and onto the fourth conveyor section 82, where it is re-transported to the conveyor device 2. During this process, the raised structures on both sides of the fourth conveyor section 82 prevent the product from falling, and the baffle plate 83 prevents the product from falling onto the conveyor device 2 due to inertia. After the product falls onto the conveyor device 2, the distance between the support rod 54 and the conveyor device 2 allows the product to continue smoothly to the designated position. Defective products are collected according to the sequence displayed on the visual inspection device 3. It is worth noting that the guide plate 703 has an opening in the middle to facilitate the passage of the push rod 62.

[0027] In summary, by introducing the product into the annular detection area composed of inner and outer rings, and driving it along a predetermined trajectory under the drive of the flexible rotating disk 61 and the elastic push rod 62, the device sequentially completes the processes of front detection, automatic flipping, reverse detection, posture conversion, circumferential rotation detection, and material return within the limited field of view of the vision inspection equipment. Specifically, the synergistic effect of multi-level wedge plates and limiting stops achieves clamp-free flipping of the front and back sides; a gradual extrusion structure guides the product from a flat position to an upright position; and the long arc-shaped limiting groove and bottom friction drive cause the product to rotate more than one revolution while moving forward, thus achieving a 360° comprehensive scan of the sides. This effectively solves the problem that due to the special structure of the disc-shaped Bluetooth headset, existing vision inspection equipment is limited by the imaging field of view and the integration difficulty of the flipping mechanism, making it difficult to achieve complete positioning of the front, back, and circumferential sides in a single inspection process, resulting in blind spots and failing to meet the full-surface automated inspection requirements of its complex three-dimensional curved shell.

[0028] Working principle: After the products are spaced a considerable distance apart, they are placed onto the conveyor device 2 in sequence. Then, the products are gathered by the gathering plate 74 and enter the first conveyor section 71. They are then transported into the front detection area 653 for detection on one side. During this process, the products are accelerated while being detected. The product then enters the first wedge plate 661 and climbs uphill. After reaching the top, the product moves towards the inclined surface of the second wedge plate 662 with the help of the stop bar 664 until it falls into the groove of the concave plate 663. Since there is a protrusion blocking the groove of the concave plate 663 away from the second wedge plate 662, the product completes the flipping of the front and back sides on the second wedge plate 662 with a larger inclination angle, with the help of the push rod 62 and the blocking of the concave plate 663. After being flipped, the product enters the reverse inspection area 67 for inspection of the other side and further acceleration; After the product enters the second flipping section 68, it first contacts the third wedge plate 681. With the help of the inner ring 64 blocking and the lifting of the third wedge plate 681, the product tilts to one side. Then the product begins to contact the extrusion plate 682. As the distance between the extrusion plate 682 and the annulus in the detection area gradually increases, the product gradually increases its tilt angle on one side with the help of the extrusion plate 682 side extrusion. At the same time, the other side moves towards the annulus in the detection area, finally realizing the change from a horizontal state to a vertical state. When the product passes the end of the third wedge plate 681, it becomes vertical and then enters the flip groove 692. With the help of the friction between the bottom of the product and the rotating disk 61, combined with the push rod 62 rod-shaped structure pushing the vertical product from both sides, the product is ensured to rotate forward as it moves along the sufficiently long flip groove 692, thereby completing the inspection of the product's periphery. Finally, the product enters the exit section 70. With the help of the guide plate 703, the product flows out of the discharge port 701 through the second connecting plate 702 and enters the fourth conveying section 82, and then is gradually sent back to the conveying device 2.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting defects in the outer shell of a Bluetooth noise-canceling smart earphone, comprising a workbench (1), a conveying device (2) disposed on the workbench (1), and a visual inspection device (3) disposed on the workbench (1) above the conveying device (2), characterized in that: A drive assembly (5) is installed on the workbench (1) directly below the vision inspection device (3), and a flipping system (6) is installed on the drive assembly (5). The flipping system (6) includes a rotating disk (61) located directly below the visual inspection device (3). An outer ring (63) and an inner ring (64) are arranged on the mounting bracket (4) at concentric positions on the rotating disk (61). A detection area is formed between the outer ring (63) and the inner ring (64). The detection area is divided into a front detection section (65), a first flipping section (66), a back detection area (67), a second flipping section (68), a side detection section (69), and an exit section (70) in a counterclockwise direction starting from the three o'clock position. The first flipping part (66) includes a flipping structure disposed opposite to each other in the detection area. The flipping structure includes a first wedge plate (661), a second wedge plate (662) and a concave plate (663) arranged sequentially and smoothly connected to each other. The second flipping section (68) includes a third wedge plate (681) and a pressing plate (682) disposed opposite to each other in the detection area. The side detection unit (69) includes two annular baffles (691) disposed opposite each other in the detection area, and a flip groove (692) is formed between the annular baffles (691).

2. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 1, characterized in that: The conveying device (2) has several sets of mounting frames (4) on both sides. The drive assembly (5) includes a drive motor (51) fixed on the mounting frame (4). A reduction gear (52) is fixed on the output end of the drive motor (51). A support rod (54) is fixed between the mounting frames (4). A rotating gear (53) is rotatably connected to the support rod (54). The rotating gear (53) and the reduction gear (52) mesh with each other. There is a gap between the support rod (54) and the conveying device (2) through which the product can pass.

3. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 2, characterized in that: The rotating disk (61) is fixed on the rotating gear (53), and the rotating disk (61) is made of rubber. Several sets of push rods (62) are fixed circumferentially on the central ring of the detection area on the rotating disk (61), and the push rods (62) are made of rubber.

4. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 2, characterized in that: The bottom of the outer ring (63) is provided with a number of balls that rotate in a circumferential direction. The outer ring (63) is connected to the rotating disk (61) through the balls. The outer ring (63) and the inner ring (64) are fixedly connected. The outer ring (63) is fixed on the mounting bracket (4).

5. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 2, characterized in that: The front detection section (65) includes a feed inlet (651) opened on the outer ring (63), and the detection area between the feed inlet (651) and the first flipping section (66) is set as the front detection area (653).

6. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 5, characterized in that: The mounting bracket (4) is also provided with a first conveying component (7), which is positioned directly opposite the front detection part (65) and conveys upwards; The first conveying assembly (7) includes a first conveying section (71) fixed on the mounting frame (4). The bottom of the first conveying section (71) is fixed with a third connecting plate (73) that connects to the surface of the conveying device (2). The first conveying section (71) is inclined. The top of the first conveying section (71) is provided with a horizontally arranged second conveying section (72). The end of the second conveying section (72) near the feed port (651) is fixed with a first connecting plate (652). The second conveying section (72) is connected to the front detection area (653) through the first connecting plate (652). The front end of the third connecting plate (73) is provided with a gathering plate (74), which is fixed on the mounting frame (4). The gathering plate (74) has a conical structure, and the narrower end of the gathering plate (74) is adapted to the third connecting plate (73), while the wider end of the gathering plate (74) is adapted to the width of the conveying device (2).

7. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 1, characterized in that: The two flipping structures are respectively adapted to the inner ring of the outer ring (63) and the outer ring of the inner ring (64), and the tilt angle of the first wedge plate (661) is smaller than the tilt angle of the second wedge plate (662). The concave plate (663) is located at the bottom of the second wedge plate (662). The groove of the concave plate (663) is adapted to the width of the product. A stop bar (664) is provided in front of the inclined surface of the first wedge plate (661). The two stop bars (664) are respectively fixed on the outer ring (63) and the inner ring (64). The bottom of the stop bar (664) is an arc structure. The height of the stop bar (664) is higher than the height of the product; there is a passage between the two flip structures.

8. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 1, characterized in that: The top of the inclined surface of the third wedge plate (681) is flush with the top of the extrusion plate (682). The width of the extrusion plate (682) gradually increases along the product movement direction, and the front end of the extrusion plate (682) is located behind the front end of the third wedge plate (681). The opening between the third wedge plate (681) and the extrusion plate (682) gradually narrows. The end of the opening between the third wedge plate (681) and the extrusion plate (682) is adapted to the width of the product.

9. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 8, characterized in that: The front end of the flip groove (692) is connected to the end of the opening between the third wedge plate (681) and the extrusion plate (682), and the width of the flip groove (692) is adapted to the width of the end of the opening between the third wedge plate (681) and the extrusion plate (682). Several rubber protrusions are uniformly fixed on the top of the opposite side of the two annular baffles (691), and the arc of the flip groove (692) is sufficient to allow the product to roll and rotate at least once inside it.

10. The device for detecting defects in the outer shell of Bluetooth noise-canceling smart headphones according to claim 2, characterized in that: The mounting bracket (4) is also provided with a second conveying component (8), which is positioned opposite the exit part (70) and conveys downwards. The exit part (70) includes a discharge port (701) opened on the outer ring (63). A guide plate (703) is provided on the discharge port (701). The guide plate (703) has an arc-shaped structure. One end of the guide plate (703) is connected to the end of the discharge port (701) near the front detection part (65). The other end of the guide plate (703) is positioned near the end of the annular baffle (691) and is fixedly connected to the outer ring of the inner ring (64). The second conveying assembly (8) includes a third conveying section (81) fixed on the mounting frame (4). The third conveying section (81) is inclined and there is a gap between the bottom of the inclined angle of the third conveying section (81) and the conveying device (2). A baffle plate (83) is provided in front of the bottom of the third conveying section (81). The baffle plate (83) is fixed on the mounting frame (4). A horizontally arranged fourth conveying section (82) is provided at the top of the third conveying section (81). A second connecting plate (702) is fixed at one end of the fourth conveying section (82) near the discharge port (701). The fourth conveying section (82) is connected to the discharge port (701) through the second connecting plate (702). The sides of the fourth conveying section (82) are provided with heightening structures to prevent products from falling.

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