A device for detecting appearance defects of mobile phone back covers

Abstract

The present invention aims to provide a device for detecting appearance defects of mobile phone back covers with a compact structure, a stable detection process, and a comprehensive detection effect. The present invention includes a frame, a visual test module, and a transfer module. The transfer module is fixedly arranged on the frame to drive the mobile phone back cover to move. The two ends of the transfer module are respectively connected to the external inflow mechanism and the external outflow mechanism. The visual test module is arranged above the transfer module. The visual test module includes a first detection component, a second detection component, a third detection component, and a code scanning component arranged in sequence. The first detection component visually inspects both sides of the mobile phone back cover, the second detection component visually inspects the entire mobile phone back cover, the code scanning component recognizes and detects the secret code on the mobile phone back cover, and the third code scanning component comprehensively inspects the mobile phone back cover with multiple light sources. The present invention is applied to the technical field of mobile phone back cover appearance defect detection equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone back cover appearance defect detection equipment, and in particular to a device for mobile phone back cover appearance defect detection. Background Art

[0002] Mobile phone screen defect detection is an important part of the mobile phone production process. In particular, defects in the back cover of the mobile phone will reduce the overall appearance of the mobile phone. The back cover of the mobile phone with obvious defects has a huge impact on the consumer experience. Major manufacturers attach great importance to it. Currently, there are two commonly used mobile phone back cover appearance inspection processes, manual testing and semi-automatic inspection equipment. Manual testing is inefficient and the classification of defect types is inaccurate. At the same time, long working hours can easily cause occupational diseases, affect subsequent process improvements and consume a lot of manpower costs. Therefore, semi-automatic inspection equipment is favored by many manufacturers.

[0003] The Chinese patent with publication number CN110290257B discloses a production line for visual inspection of mobile phone back covers, which includes a motor drive device, a vertical conveyor belt conveying device, and a visual inspection device. The synchronous conveyor belt is placed vertically, and a number of mobile phone back cover loading brackets are fixed on it. The vertical conveyor belt is driven by a motor to realize continuous conveying and inspection of the mobile phone back covers. The visual inspection device above the conveyor belt is equipped with two inspection darkrooms. At the corresponding workstations in the inspection darkrooms, a cam mechanism is used to automatically raise the height of the loading brackets. The mobile phone is sent into the two inspection darkrooms through the circular transmission belt. The LED lights and cameras in the darkrooms illuminate the back cover of the mobile phone and take pictures for inspection. However, in the darkroom, the back cover of the mobile phone is mainly illuminated by a large LED light board and multiple small LED light boards with cameras. During the inspection process, the light is difficult to show the defects of the back cover of the mobile phone from multiple angles, which makes the inspection results incomplete and difficult for users to cope with increasingly stringent usage requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a device for detecting appearance defects of mobile phone back covers with a compact structure, a stable detection process and comprehensive detection effects.

[0005] The technical solution adopted by the present invention is: the present invention includes a frame, a visual test module and a transfer module, the transfer module is fixedly arranged on the frame to drive the back cover of the mobile phone to move, the two ends of the transfer module are respectively connected to the external inflow mechanism and the external outflow mechanism, the visual test module is arranged above the transfer module, and the visual test module includes a first detection component, a second detection component, a third detection component and a code scanning component arranged in sequence, the first detection component visually inspects both sides of the back cover of the mobile phone, the second detection component visually inspects the entire back cover of the mobile phone, the code scanning component recognizes and detects the secret code on the back cover of the mobile phone, and the third detection component performs a comprehensive inspection of the back cover of the mobile phone with multiple light sources.

[0006] Furthermore, the first detection component includes two groups of first support frames, a first gantry, two groups of connecting rods, two groups of first light source groups and two groups of first industrial cameras. The two groups of first support frames and the first gantry are fixedly connected to the frame, one end of the two groups of connecting rods are slidingly connected to the first gantry, and the other ends of the two groups of connecting rods are respectively connected to the two groups of first industrial cameras. The two groups of first light source groups are respectively arranged under the two groups of first support frames, and the light-emitting sides of the two groups of first light source groups face the transfer module. The two groups of first industrial cameras take pictures of the back cover of the mobile phone at a certain angle for detection.

[0007] Furthermore, a first slider is provided at the connection between the connecting rod and the first gantry, and the connecting rod is provided with a sliding block, the sliding block and the connecting rod are slidably matched, one end of the sliding block is connected to an adjustment block, the adjustment block is fixedly connected to the sliding block, the first industrial camera is fixedly connected to the adjustment block, and a first guide is provided on one side of the adjustment block, and the first guide enables the adjustment block to adjust the angle at a certain angle.

[0008] Furthermore, the second detection component includes a second support frame, several second industrial cameras, two groups of second top direct light source groups, two groups of second side direct light source groups and a second bottom direct light source group. The second support frame is arranged on the frame, and several second industrial cameras are all arranged on the upper part of the second support frame. The two groups of second top direct light source groups and the two groups of second side direct light source groups are symmetrically arranged on the second support frame. The bottom direct light source group is fixedly connected to the frame and is arranged below the second top direct light source group.

[0009] Furthermore, the second top direct light source group is a stepped light source.

[0010] Furthermore, the bottom direct light source group is provided with a prism and a light blocking plate, the prism is tilted above the bottom direct light source group, and the light blocking plate is fixedly connected to the side wall of the bottom direct light source group and blocks the light refracted by the prism.

[0011] Furthermore, the third detection component includes a third support frame, two groups of third industrial cameras, a third top direct light source group, two groups of third X-axis ring light source groups, two groups of third Y-axis ring light source groups and a third bottom direct light source. The third support frame is fixedly connected to the frame, and the two groups of the third industrial cameras are respectively arranged at the upper and lower ends of the third support frame. The third support frame is provided with a number of rotating connecting parts. The two groups of the third X-axis ring light source groups and the two groups of the third Y-axis ring light source groups are respectively connected to the several rotating connecting parts, and the third top direct light source group and the third bottom direct light source group are both rotatably connected to the two groups of the rotating connecting parts.

[0012] Furthermore, the code scanning component includes a code scanning support frame, a code scanning camera and two groups of code scanning light sources. The code scanning support frame is fixedly connected to the third detection component. The code scanning camera is arranged in the middle of the code scanning support frame. Code scanning sliders are provided on both sides of the code scanning support frame. The two groups of code scanning light sources can be rotatably connected to the code scanning sliders respectively.

[0013] Furthermore, the transfer module includes a transfer bracket, a number of magnetic rollers, a number of guide wheel groups and a transmission roller. The transfer bracket is arranged on the frame, and the several magnetic rollers are rotatably connected to the transfer bracket. The transmission roller is rotatably connected to a side arm of the transfer bracket through a transfer connector and is magnetically transmitted to the several magnetic rollers. The several guide wheel groups are arranged at one end of the transfer bracket close to the external feeding mechanism, and the several magnetic rollers are provided with a conveying member adapted to the back cover of the mobile phone.

[0014] Furthermore, a fourth detection component is provided at one end of the transfer module close to the external outflow mechanism, and the fourth detection component includes a fourth industrial camera, a fourth light source group, two groups of transmission parts and two groups of fourth transmission shafts. The fourth industrial camera is fixedly connected to the third detection component, and the fourth light source group is arranged below the fourth industrial camera and fixedly connected to the transfer bracket. Two groups of fourth transmission shafts are rotatably connected to the transfer bracket, and the two groups of fourth transmission shaft sleeves are correspondingly provided with rotating sleeves that cooperate with the two groups of transmission parts.

[0015] The beneficial effects of the present invention are: since the present invention adopts multiple modules to illuminate the back cover of the mobile phone at multiple angles to image the internal defects, the three groups of detection components detect different defects respectively, the defect type classification is accurate and reliable, the detection efficiency is high, and the secret code group displayed at a specific angle makes the detection data correspond one-to-one with the back cover of the mobile phone. The code scanning and recognition are effective without affecting the product appearance, and the overall degree of automation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0018] Figure 3 is a schematic structural diagram of the second detection component of the present invention;

[0019] Figure 4 It is a structural diagram of the code scanning component of the present invention;

[0020] Figure 5 is a schematic structural diagram of the third detection component of the present invention;

[0021] Figure 6 It is a structural diagram of the fourth detection component of the present invention;. DETAILED DESCRIPTION

[0022] like Figures 1 to 6 As shown, in this embodiment, the present invention includes a frame 1, a visual test module and a transfer module 2, the transfer module 2 is fixedly arranged on the frame 1 to drive the back cover of the mobile phone to move, the two ends of the transfer module 2 are respectively connected to the external inflow mechanism and the external outflow mechanism, the visual test module is arranged above the transfer module 2, the visual test module includes a first detection component 3, a second detection component 4, a third detection component 6 and a code scanning component 5 arranged in sequence, the first detection component 3 performs visual inspection on both sides of the back cover of the mobile phone, the second detection component 4 performs overall visual inspection on the back cover of the mobile phone, the code scanning component 5 performs secret code recognition inspection on the back cover of the mobile phone, and the third detection component 5 performs multi-light source coverage comprehensive inspection on the back cover of the mobile phone, the frame 1 is provided with multiple groups of limit members respectively limited with the first detection component 3, the second detection component 4, the third detection component 6 and the code scanning component 5, which is convenient for staff to position during installation, the transfer module 2 uses magnetic gear contactless transmission, the transmission is stable and efficient, and no vibration occurs during the process, effectively preventing the displacement of the back cover of the mobile phone caused by vibration, Affecting the photo detection effect, the back cover of the mobile phone flows into the transfer module 2 from the outside, and the first detection component 3 illuminates from both sides of the transfer module 2 so that light enters from the side edge of the back cover of the mobile phone, exposing obvious defects on the side edge and taking photos to record, and then the back cover of the mobile phone continues to move to the second detection component 4. The second detection component 4 illuminates the back cover of the mobile phone from six directions of up, down, left, right, front and back, and is equipped with multiple industrial cameras to take photos and record the back cover of the mobile phone. There can be no obvious identification code on the back cover of the mobile phone, and the secret code that can only be displayed by setting a specific angle of lighting does not affect the external The system also realizes automated detection and identification. The code scanning component 5 uses two sets of tilted code scanning light sources 53 to display the secret code inside the back cover of the mobile phone and uses the code scanning camera 52 to take a photo and identify the mark. After the code is scanned and identified, it flows into the third detection component 6. The third detection component 6 uses arc-shaped light sources, oblique light sources and mostly strip-shaped light sources, combined with mixed strobe control timing to image the defects in the arc edge and horizontal scratches of the back cover of the mobile phone, thereby highlighting the defects such as bubbles, bruises, stones, scratches, dirt, bumps, indentations, water ripples, etc. in the glass. Multi-module coordination is used to illuminate the back cover of the mobile phone at multiple angles to image the internal defects. The three sets of detection components detect different defects accordingly. The defect type classification is accurate and reliable, and the detection efficiency is high. The secret code group displayed at a specific angle makes the detection data correspond one-to-one with the back cover of the mobile phone. The code scanning and recognition are effective without affecting the appearance of the product, and the overall degree of automation is improved.

[0023] In this embodiment, the first detection component 3 includes two groups of first support frames 31, a first gantry 32, two groups of connecting rods 33, two groups of first light source groups 34 and two groups of first industrial cameras 35. The two groups of first support frames 31 and the first gantry 32 are fixedly connected to the frame 1, one end of the two groups of connecting rods 33 are slidably connected to the first gantry 32, and the other ends of the two groups of connecting rods 33 are respectively connected to the two groups of first industrial cameras 35. The two groups of first light source groups 34 are respectively arranged below the two groups of first support frames 31. The two groups of first light source groups 34 The illuminated side of the first light source faces the transfer module 2. Two sets of the first industrial cameras 35 are angled to photograph and inspect the mobile phone back cover. The first gantry 32 is provided with a scale bar, and the connecting rod 33 is provided with a positioning piece that cooperates with the scale bar. The connecting rod 33 drives the first industrial camera 35 to adjust along the Y and Z axes. The first light source group 34 is an LED light source, and a focusing lens is provided on the side of the light-emitting end of the first light source group 34. The lower end of the first support frame 31 is provided with an arc groove, and the two ends of the first light source group 34 are provided with protrusions that cooperate with the arc groove. The first light source group 34 rotates up and down under the guidance of the arc groove to adjust the lighting position. Using a scaled first gantry 32 structure, the position of the connecting rod 33 is adjusted to move the first industrial camera 35 to the appropriate position for products of different sizes. The first light source group 34 rotates along the arc groove to adjust the light source focus direction, making the first inspection assembly 3 compatible with a variety of different mobile phone back covers, with good compatibility and high testing accuracy.

[0024] In this embodiment, a first slider 36 is provided at the connection between the connecting rod 33 and the first gantry 32, and the connecting rod 33 is provided with a sliding block 37. The sliding block 37 slides with the connecting rod 33, and one end of the sliding block 37 is connected to an adjusting block 38. The adjusting block 38 is fixedly connected to the sliding block 37. The first industrial camera 35 is fixedly connected to the adjusting block 38. A first guide is provided on one side of the adjusting block 38. The first guide enables the adjusting block 38 to adjust the angle at a certain angle. The adjusting block 38 is connected to the sliding block 37 through a screw and a spring. The position of the adjusting block 38 is fine-tuned by turning the screw, so that the shooting position of the first industrial camera 35 is accurate and effective, thereby improving the accuracy of the first detection component 3.

[0025] In this embodiment, the second detection component 4 includes a second support frame 41, a plurality of second industrial cameras 42, two groups of second top direct light source groups 43, two groups of second side direct light source groups 44 and a second bottom direct light source group 45. The second support frame 41 is arranged on the frame 1, and the plurality of second industrial cameras 42 are all arranged on the upper part of the second support frame 41. The two groups of second top direct light source groups 43 and the two groups of second side direct light source groups 44 are symmetrically arranged on the second support frame 41. The second bottom direct light source group 45 is fixedly connected to the frame 1 and arranged below the second top direct light source group 43. The side light source groups are all strip lights. A focusing lens is provided on one side of the light outlet of the side light source group to converge the scattered light source and increase the brightness. The top direct light source group is a graded light source with a focusing lens on one side of the outlet. The second bottom direct light source group 45 illuminates from the bottom of the mobile phone casing and irradiates light to the back cover of the mobile phone from six directions. Various defects of the back cover of the mobile phone are highlighted at multiple angles. Multiple second industrial cameras 42 take pictures and record at different angles, so that the highlighted defects can be photographed as much as possible, and the test effect is comprehensive and accurate.

[0026] In this embodiment, the second top direct light source group 43 is a stepped light source, with light source components arranged in stages and provided with corresponding lens groups, so that the illumination range of the top direct light source group is accurate, reducing the light source emission resulting in a decrease in brightness, which in turn affects the photo taking effect.

[0027] In this embodiment, the second bottom direct light source group 45 is provided with a prism 46 and a light baffle 47. The prism 46 is tilted above the second bottom direct light source group 45. The light baffle 47 is fixedly connected to the side wall of the second bottom direct light source group 45 and blocks the light refracted by the prism 46. The tilted prism 46 can reflect part of the light when the light passes through, weakening the brightness of the light penetrating vertically upward, forming a brightness difference between the bottom and top light source groups, and the defects recorded by the second industrial camera 42 are more obvious. The light baffle 47 intercepts the reflected light to prevent scattered light from affecting the detection of other components.

[0028] In this embodiment, the third detection component 6 includes a third support frame 61, two groups of third industrial cameras 62, a third top direct light source group 63, two groups of third X-axis ring light source groups 64, two groups of third Y-axis ring light source groups 65 and a third bottom direct light source group 66. The third support frame 61 is fixedly connected to the frame 1, and the two groups of the third industrial cameras 62 are respectively arranged at the upper and lower ends of the third support frame 61. The third support frame 61 is provided with a plurality of rotating connecting parts, and the two groups of the third X-axis ring light source groups 64 and the two groups of the third Y-axis ring light source groups 65 are respectively connected to the plurality of rotating connecting parts. Then, the third top direct light source group 63 and the third bottom direct light source group 66 are rotatably connected to the two groups of rotating connecting parts, the third industrial camera 62 is a line scan camera, the third top direct light source group 63 and the third bottom direct light source group 66 are mixed light sources, the bright light source and the dark light source in the mixed light source are arranged at intervals, and the internal bright light source and the dark light source can be mixed and stroboscopically controlled respectively. The third X-axis ring light source group 64 and the third Y-axis ring light source group 65 are multi-dimensional profiling light sources, and the arc structure imitates natural light irradiating the back cover of the mobile phone, solving the problem that the arc edge of the glass cannot be imaged, making the detection scene closer to the actual use environment. A third top direct light source group 63 and a third bottom direct light source group 66 are adopted, in which dark light sources and bright light sources are arranged at intervals. By controlling the timing, multiple groups of light sources are mixed and strobed at different times. In conjunction with the third industrial camera 62 located at the upper and lower positions, the back cover of the mobile phone is scanned and photographed. This can obtain defects such as bubbles, bruises, stones, scratches, dirt, bumps, indentations, water ripples, etc. in the glass, resulting in better test results and accurate and effective detection.

[0029] In this embodiment, the code scanning component 5 includes a code scanning support frame 51, a code scanning camera 52 and two groups of code scanning light sources 53. The code scanning support frame 51 is fixedly connected to the third detection component 6. The code scanning camera 52 is arranged in the middle of the code scanning support frame 51. Code scanning sliders 54 are provided on both sides of the code scanning support frame 51. The two groups of code scanning light sources 53 can be rotatably connected to the code scanning sliders 54 respectively. The code scanning slider 54 is provided with a number of rotating rods, adjustment plates and adjustment rods. The rotating rods are rotatably connected to the adjustment plates. The adjustment plates are provided with multiple U-shaped grooves. The adjustment rods are used to connect adjacent adjustment plates. The adjustment plates and adjustment rods are arranged so that the code scanning light sources 53 can be displaced at multiple angles. The matching structure is simple and easy to use, and has good compatibility.

[0030] In this embodiment, the transfer module 2 includes a transfer bracket 21, a plurality of magnetic rollers 22, a plurality of guide wheel groups 23 and a transmission roller 24. The transfer bracket 21 is arranged on the frame 1, and the plurality of magnetic rollers 22 are rotatably connected to the transfer bracket 21. The transmission roller 24 is rotatably connected to a side arm of the transfer bracket 21 through a transfer connector and is magnetically transmitted to the plurality of magnetic rollers 22. The plurality of guide wheel groups 23 are arranged at one end of the transfer bracket 21 close to the external feeding mechanism. The plurality of magnetic rollers 22 are provided with a conveying member adapted to the back cover of the mobile phone. A magnetic gear is provided at one end of the magnetic roller 22, and a magnetic gear is provided on the transmission roller 24. The permanent magnet of the gear magnetic match is provided, and a guide rod is provided on the side of the transfer bracket 21 near the feeding position. The width of the guide rod is slightly larger than the width of the back cover of the mobile phone, which guides the back cover of the mobile phone to the correct position. The guide wheel group 23 can be adjustably set on the lower bracket, and the position is adjusted and fixed according to the size of the back cover of the mobile phone. The position of the back cover of the mobile phone during the forward movement is adjusted to reduce the occurrence of offset. The contactless magnetic transmission structure is adopted. Compared with the mechanical contact transmission, the noise and vibration are greatly reduced. The back cover of the mobile phone is stable during the transfer process and will not form a large offset, thereby improving the detection accuracy. The contactless transmission can also achieve dust-free processing, reduce dust falling on the back cover of the mobile phone, and reduce the interference factors affecting the detection.

[0031] In this embodiment, the transfer module 2 is further provided with a fourth detection component 7 at one end close to the external outflow mechanism, and the fourth detection component 7 includes a fourth industrial camera 71, a fourth light source group 72, two groups of transmission members 73 and two groups of fourth transmission shafts 74. The fourth industrial camera 71 is fixedly connected to the third detection component 6, and the fourth light source group 72 is arranged below the fourth industrial camera 71 and is fixedly connected to the transfer bracket 21. The two groups of fourth transmission shafts 74 are rotatably connected to the transfer bracket 21, and the two groups of the fourth transmission shafts 74 are correspondingly provided with matching sets of the two groups of transmission members 73. The fourth industrial camera 71 is an area array camera, the fourth light source group 72 is an area array light source, the transmission member 73 is a thin rope to reduce the occlusion of the fourth light source group 72 when taking pictures, and a card slot is provided in the transmission sleeve. The transmission member 73 is inserted into the card slot and drives the back cover of the mobile phone through the fourth light source group 72. The fourth detection component 7 is an internal stress detection group. The fourth light source group 72 illuminates from below, and the fourth industrial camera 71 takes pictures and detects from above, so as to obtain an online, high-speed, high-brightness, and high-contrast polarization information result of the internal stress condition of the back cover of the mobile phone. The detection accuracy is high and the overall degree of automation is high.

[0032] Working principle of the present invention:

[0033] The back cover of the mobile phone is placed from an external assembly line or manually into the inflow side of the transfer module 2. The transmission roller 24 is connected to the external drive mechanism and rotates. The transmission roller 24 drives the magnetic roller shaft 22 to rotate through magnetic transmission. The transmission member 73 drives the back cover of the mobile phone to move forward in the direction of the transfer bracket 21 and enter the first detection component 3. The first light source group 34 on both sides illuminates both sides of the back cover of the mobile phone. The first industrial camera 35 takes pictures and records, and then continues to move forward and flows into the second detection component 4. The second test component illuminates the back cover of the mobile phone from six directions of up, down, left, right, front and back. Multiple industrial cameras The back cover of the mobile phone is photographed and recorded, and continues to flow along the transfer module 2 to the code scanning module, where the secret code inside the back cover of the mobile phone is scanned and identified, and then flows into the third test module after identification. The third detection component 6 uses arc light source, oblique light source and multi-dimensional strip light source, combined with mixed strobe control timing, to image the defects in the arc edge and horizontal scratches of the back cover of the mobile phone. The third industrial camera 62 captures images under different light sources, and finally enters the fourth detection module. The fourth light source group 72 and the fourth industrial camera 71 cooperate to detect the internal stress of the back cover of the mobile phone, and then flows out along the transfer module 2.

[0034] Although the embodiments of the present invention are described with practical solutions, they do not limit the meaning of the present invention. For those skilled in the art, it is obvious to modify the implementation scheme and combine it with other solutions based on this description.

Claims

1. A device for detecting appearance defects of a mobile phone back cover, comprising a frame (1) and a transfer module (2), wherein the transfer module (2) is fixedly arranged on the frame (1) to drive the mobile phone back cover to move, and the two ends of the transfer module (2) are respectively connected to an external inflow mechanism and an external outflow mechanism, and is characterized in that: The device for detecting appearance defects of the mobile phone back cover also includes a visual test module, which is arranged above the transfer module (2). The visual test module includes a first detection component (3), a second detection component (4), a code scanning component (5) and a third detection component (6) which are arranged in sequence. The first detection component (3) performs visual inspection on both sides of the mobile phone back cover, the second detection component (4) performs visual inspection on the entire mobile phone back cover, the code scanning component (5) performs identification inspection on the secret code on the mobile phone back cover, and the third detection component (6) performs comprehensive inspection on the mobile phone back cover with multiple light sources. The first detection component (3) includes two groups of first support frames (31), first A gantry (32), two groups of connecting rods (33), two groups of first light source groups (34) and two groups of first industrial cameras (35), wherein the two groups of the first support frames (31) and the first gantry (32) are fixedly connected to the frame (1), one end of the two groups of the connecting rods (33) are slidably connected to the first gantry (32), and the other ends of the two groups of the connecting rods (33) are respectively connected to the two groups of the first industrial cameras (35), the two groups of the first light source groups (34) are respectively arranged below the two groups of the first support frames (31), and the light-emitting sides of the two groups of the first light source groups (34) face the transfer module (2), and the two groups of the first industrial cameras ( 35) takes a photo of the back cover of the mobile phone at a certain angle for detection; a first slider (36) is provided at the connection between the connecting rod (33) and the first gantry (32); the connecting rod (33) is provided with a sliding block (37); the sliding block (37) and the connecting rod (33) are slidably matched; one end of the sliding block (37) is connected to an adjustment block (38); the adjustment block (38) is fixedly connected to the sliding block (37); the first industrial camera (35) is fixedly connected to the adjustment block (38); a first guide is provided on one side of the adjustment block (38); the first guide enables the adjustment block (38) to adjust the angle at a certain angle; the second detection component ( 4) comprising a second support frame (41), a plurality of second industrial cameras (42), two groups of second top direct light source groups (43), two groups of second side direct light source groups (44) and a second bottom direct light source group (45), wherein the second support frame (41) is arranged on the frame (1), the plurality of second industrial cameras (42) are all arranged on the upper part of the second support frame (41), the two groups of the second top direct light source groups (43) and the two groups of the second side direct light source groups (44) are all symmetrically arranged on the second support frame (41), and the second bottom direct light source group (45) is fixedly connected to the frame (1) and arranged below the second top direct light source group (43);The third detection assembly (6) includes a third support frame (61), two groups of third industrial cameras (62), a third top direct light source group (63), two groups of third X-axis ring light source groups (64), two groups of third Y-axis ring light source groups (65) and a third bottom direct light source group (66), wherein the third support frame (61) is fixedly connected to the frame (1), the two groups of the third industrial cameras (62) are respectively arranged at the upper and lower ends of the third support frame (61), the third support frame (61) is provided with a plurality of rotating connecting members (67), the two groups of the third X-axis ring light source groups (64) and the two groups of the third Y-axis ring light source groups (65) are respectively connected to the plurality of rotating connecting members (67), and the third top direct light source group (63) and the third bottom direct light source group (66) are both rotatably connected to the two groups of the rotating connecting members (67).

2. The device for detecting appearance defects of a mobile phone back cover according to claim 1, characterized in that: The second top direct light source group (43) is a stepped light source.

3. The device for detecting appearance defects of a mobile phone back cover according to claim 1, characterized in that: The second bottom direct light source group (45) is provided with a prism (46) and a light blocking plate (47); the prism (46) is arranged obliquely above the second bottom direct light source group (45); and the light blocking plate (47) is fixedly connected to the side wall of the second bottom direct light source group (45) and blocks the light refracted by the prism (46).

4. The device for detecting appearance defects of a mobile phone back cover according to claim 1, characterized in that: The code scanning component (5) comprises a code scanning support frame (51), a code scanning camera (52) and two groups of code scanning light sources (53). The code scanning support frame (51) is fixedly connected to the third detection component (6). The code scanning camera (52) is arranged in the middle of the code scanning support frame (51). Code scanning sliders (54) are provided on both sides of the code scanning support frame (51). The two groups of code scanning light sources (53) are respectively rotatably connected to the code scanning sliders (54).

5. The device for detecting appearance defects of a mobile phone back cover according to claim 1, characterized in that: The transfer module (2) comprises a transfer bracket (21), a plurality of magnetic rollers (22), a plurality of guide wheel groups (23) and a transmission roller (24); the transfer bracket (21) is arranged on the frame (1); the plurality of magnetic rollers (22) are rotatably connected to the transfer bracket (21); the transmission roller (24) is rotatably connected to a side arm of the transfer bracket (21) through a transfer connector and is magnetically driven by the plurality of magnetic rollers (22); the plurality of guide wheel groups (23) are arranged at one end of the transfer bracket (21) close to the external feeding mechanism; and the plurality of magnetic rollers (22) are provided with a conveying member adapted to the back cover of the mobile phone.

6. The device for detecting appearance defects of a mobile phone back cover according to claim 5, characterized in that: The transfer module (2) is further provided with a fourth detection component (7) at one end close to the external outflow mechanism, and the fourth detection component (7) includes a fourth industrial camera (71), a fourth light source group (72), two groups of transmission members (73) and two groups of fourth transmission shafts (74). The fourth industrial camera (71) is fixedly connected to the third detection component (6), the fourth light source group (72) is arranged below the fourth industrial camera (71) and is fixedly connected to the transfer bracket (21), the two groups of fourth transmission shafts (74) are rotatably connected to the transfer bracket (21), and the two groups of the fourth transmission shaft (74) sleeves are correspondingly provided with a rotating sleeve (75) that matches the two groups of the transmission members (73).

Images