An optical detection device for appearance defects of a mobile phone middle frame

Abstract

The utility model provides a kind of optical detection device for mobile phone middle frame appearance flaw, including outer frame, the inside fixed mounting of outer frame has arc hanging plate, the surface of arc hanging plate is installed with multiple first industrial camera and first detection light source, the middle part of one side of arc hanging plate is installed with extension plate, the surface of extension plate is installed with second industrial camera, the inside wall of the front side of outer frame is installed with multiple second detection light source and third detection light source, the bottom of the front side of outer frame is installed with third industrial camera, first detection light source, second detection light source and third detection light source constitute multi-angle light source illumination, imitate human eye, adapt to mobile phone middle frame appearance flaw detection, solve the problem of single light source angle in traditional appearance detection, to solve the quality anomaly and missed detection caused by part of defect not being imaged due to single angle.

Description

Technical Field

[0001] This utility model belongs to the field of mobile phone mid-frame detection technology, specifically relating to an optical detection device for appearance defects of mobile phone mid-frames. Background Technology

[0002] The mid-frame of a mobile phone plays a crucial role in protecting the device. During the manufacturing process, issues such as imperfections like unevenness, asymmetry, distortion, scratches, dents, and fingerprints may occur, potentially causing damage or seal defects. Therefore, the mid-frame requires visual inspection after production. However, current methods rely heavily on human inspection for these defects, leading to eye fatigue, inconsistent quality, and prolonged exposure to bright lights, which can be harmful to the eyes. Currently, industrial cameras are available for optical inspection of the mid-frame. However, a single inspection can only detect one side of the phone frame, which still cannot achieve efficient inspection of the phone frame. A mid-frame appearance defect inspection device disclosed in Chinese patent application number "202322416352.2" uses a diffuse strip light and two diffuse surface lights to illuminate the mid-frame, and uses an industrial camera mounted on an arc-shaped plate to perform multi-angle appearance inspection of the mid-frame, which improves the inspection efficiency of the phone frame. However, the light source angle of the above device is single, which can easily cause some defects to be unimaged, resulting in abnormal inspection quality and missed detection of the phone frame. Based on this, we propose an optical inspection device with multi-angle light source illumination. Utility Model Content

[0003] The purpose of this invention is to provide an optical detection device for defects in the appearance of mobile phone frames, aiming to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an optical inspection device for detecting appearance defects in the mid-frame of a mobile phone, comprising an outer frame, an arc-shaped mounting plate fixedly installed inside the outer frame, a plurality of first industrial cameras and a first detection light source mounted on the surface of the arc-shaped mounting plate, an extension plate mounted on the middle of one side of the arc-shaped mounting plate, a second industrial camera mounted on the surface of the extension plate, a plurality of second detection light sources and a third detection light source mounted on the inner walls of both sides of the front of the outer frame, and a third industrial camera mounted on the bottom of one side of the front of the outer frame. The first, second, and third industrial cameras are used to perform appearance inspection on the surface of the mid-frame of the fixture.

[0005] The number of first industrial cameras is three, and the number of first detection light sources is five. The three first detection light sources are evenly arranged side by side in the middle of the arc-shaped hanging plate. The first industrial cameras are respectively set at both ends of the three first detection light sources. The first industrial camera is installed at the top end of the arc-shaped hanging plate. A first detection light source is set between the two first industrial cameras at the top of the arc-shaped hanging plate. The first detection light source is installed at the bottom end of the arc-shaped hanging plate.

[0006] As a preferred technical solution of this utility model, the number of second detection light sources is four, with two second detection light sources installed on the inner walls of both sides of the front of the outer frame, and the number of third detection light sources is two. The two third detection light sources are installed on the inner walls of both sides of the front of the outer frame, and the third detection light source on each side is located between the corresponding two second detection light sources.

[0007] As a preferred technical solution of this utility model, the angle between the first industrial camera located at the top end of the arc-shaped mounting plate and the fixture is 60.27°, the angle between the other first industrial camera located at the top of the arc-shaped mounting plate and the fixture support is 114.83°, the first industrial camera located at the bottom end of the arc-shaped mounting plate is perpendicular to the fixture, the second industrial camera is perpendicular to the fixture, and the shooting angle of the third industrial camera is 112.41° with the horizontal plane at the bottom of the front of the outer frame.

[0008] As a preferred technical solution of this utility model, the first detection light source located at the top of the arc-shaped mounting plate is perpendicular to the fixture. Among the three parallel first detection light sources, the angle between the top first detection light source and the vertical axis of the fixture is 112.04°, the angle between the top first detection light source and the vertical axis of the fixture is 84.2°, the angle between the top first detection light source and the vertical axis of the fixture is 65.11°, and the angle between the bottom first detection light source and the vertical axis of the fixture is 23.17°.

[0009] As a preferred technical solution of this utility model, the illumination angle of the second detection light source is 35° with the top horizontal plane of the fixture, and the illumination angle of the third detection light source is perpendicular to the fixture.

[0010] As a preferred technical solution of this utility model, the first detection light source, the second detection light source and the third detection light source are all diffuse surface lights, and the first industrial camera, the second industrial camera and the third industrial camera are all CCD cameras.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the first detection light source, the second detection light source and the third detection light source form a multi-angle light source illumination, which imitates the human eye and is suitable for the appearance defect detection of the mobile phone frame. It solves the problem of a single light source angle in traditional appearance inspection, thereby solving the quality abnormalities and missed detections caused by the inability to image some defects due to a single angle. Attached Figure Description

[0012] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the outer frame, the second detection light source, and the third detection light source in this utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the arc-shaped hanging plate, the first industrial camera, and the first detection light source in this utility model;

[0016] Figure 4 This is a structural schematic diagram showing the installation angles of the first and second industrial cameras in this utility model;

[0017] Figure 5 This is a schematic diagram of the installation angle structure of the third industrial camera in this utility model;

[0018] Figure 6 This is a schematic diagram of the installation angle structure of the first detection light source in this utility model;

[0019] Figure 7 This is a schematic diagram of the installation angle structure of the second detection light source in this utility model.

[0020] In the diagram: 1. Outer frame; 2. Curved mounting plate; 3. First industrial camera; 4. First detection light source; 5. Extension plate; 6. Second industrial camera; 7. Second detection light source; 8. Third detection light source; 9. Third industrial camera; 10. Fixture. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-7 The present invention provides the following technical solution: an optical inspection device for detecting defects in the appearance of a mobile phone frame, comprising an outer frame 1, an arc-shaped mounting plate 2 fixedly installed inside the outer frame 1, a plurality of first industrial cameras 3 and a first detection light source 4 mounted on the surface of the arc-shaped mounting plate 2, an extension plate 5 mounted on the middle of one side of the arc-shaped mounting plate 2, a second industrial camera 6 mounted on the surface of the extension plate 5, a plurality of second detection light sources 7 and third detection light sources 8 mounted on the inner walls of both sides of the front of the outer frame 1, and a third industrial camera 9 mounted on the bottom of one side of the front of the outer frame 1. The first industrial cameras 3, 6, and 9 are used to perform appearance inspection on the surface of the frame of the fixture 10. The first detection light source 4, 7, and 8 are all diffuse surface lights, and the first, 6, and 9 are all CCD cameras.

[0023] The system comprises three first industrial cameras 3 and five first detection light sources 4. The three first detection light sources 4 are evenly arranged side by side in the middle of the arc-shaped hanging plate 2. The first industrial cameras 3 are respectively installed at both ends of the three first detection light sources 4. The first industrial cameras 3 are installed at the top end of the arc-shaped hanging plate 2. A first detection light source 4 is set between the two first industrial cameras 3 at the top of the arc-shaped hanging plate 2. A first detection light source 4 is installed at the bottom end of the arc-shaped hanging plate 2. The system comprises four second detection light sources 7. Two second detection light sources 7 are installed on the inner walls of both sides of the front of the outer frame 1. The system comprises two third detection light sources 8. The two third detection light sources 8 are respectively installed on the inner walls of both sides of the front of the outer frame 1. Each third detection light source 8 is located between the corresponding two second detection light sources 7.

[0024] In this embodiment, the angle between the first industrial camera 3 located at the top end of the arc-shaped mounting plate 2 and the fixture 10 is 60.27°, the angle between the other first industrial camera 3 located at the top of the arc-shaped mounting plate 2 and the bracket of the fixture 10 is 114.83°, the first industrial camera 3 located at the bottom end of the arc-shaped mounting plate 2 is perpendicular to the fixture 10, the second industrial camera 6 is perpendicular to the fixture 10, and the shooting angle of the third industrial camera 9 is 112.41° with the horizontal plane at the bottom front of the outer frame 1.

[0025] Specifically, the angle between the installation positions of the first industrial camera 3, the second industrial camera 6, and the third industrial camera 9 on the device and the fixture 10 allows for effective imaging of the top, top side, side, bottom side, and bottom of the mobile phone frame. This method effectively improves the detection accuracy and quality of the mobile phone frame and avoids missed detections.

[0026] In this embodiment, the first detection light source 4 located at the top of the arc-shaped mounting plate 2 is perpendicular to the fixture 10. Among the three parallel first detection light sources 4, the angle between the top first detection light source 4 and the vertical axis of the fixture 10 is 112.04°, the angle between the top first detection light source 4 and the vertical axis of the fixture 10 is 84.2°, the angle between the top first detection light source 4 and the vertical axis of the fixture 10 is 65.11°, the angle between the bottom first detection light source 4 and the vertical axis of the fixture 10 is 23.17°, the angle between the illumination angle of the second detection light source 7 and the top horizontal plane of the fixture 10 is 35°, and the illumination angle of the third detection light source 8 is perpendicular to the fixture 10.

[0027] Specifically, the angle between the installation positions of the first detection light source 4, the second detection light source 7, and the third detection light source 8 and the fixture 10 enables multi-angle illumination of the phone's mid-frame. This allows the first detection light source 4, the second detection light source 7, and the third detection light source 8 to mimic the human eye in illuminating the phone's mid-frame from multiple angles. When the conveying device transports the fixture 10 carrying the phone's mid-frame to the device for inspection, the first detection light source 4, the second detection light source 7, and the third detection light source 8 can provide multi-angle illumination. This multi-angle illumination method solves the problem of some defects not being imaged due to a single illumination angle, leading to abnormal inspection quality and missed detections. Therefore, this method effectively improves the inspection accuracy of the phone's mid-frame. Furthermore, this multi-angle light source illumination method can solve the problem of appearance defect detection in the industrial sector, providing significant help and impetus to quality control in the industry.

[0028] Working principle: The fixture 10 carrying the mobile phone frame is conveyed to the inspection device by the conveying device for inspection. The first inspection light source 4 installed on the surface of the arc-shaped hanging plate 2 can illuminate the top, top side, side, bottom side and bottom of the mobile phone frame facing the device. The second inspection light source 7 and the third inspection light source 8 can illuminate the top, side and bottom of the mobile phone frame away from the device. The multi-angle light source illumination composed of the first inspection light source 4, the second inspection light source 7 and the third inspection light source 8 solves the problem that multiple angles are needed to see the appearance defects of the mobile phone frame. The first industrial camera 3, the second industrial camera 6 and the third industrial camera 9 are set to inspect the appearance defects of the mobile phone frame, thereby solving the quality abnormality and missed detection problem caused by the inability to image some defects of the mobile phone frame from a single angle.

[0029] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An optical inspection device for detecting defects in the appearance of a mobile phone frame, comprising an outer frame (1), characterized in that: An arc-shaped hanging plate (2) is fixedly installed inside the outer frame (1). Multiple first industrial cameras (3) and first detection light sources (4) are installed on the surface of the arc-shaped hanging plate (2). An extension plate (5) is installed in the middle of one side of the arc-shaped hanging plate (2). A second industrial camera (6) is installed on the surface of the extension plate (5). Multiple second detection light sources (7) and third detection light sources (8) are installed on the inner walls of both sides of the front of the outer frame (1). A third industrial camera (9) is installed at the bottom of one side of the front of the outer frame (1). The first industrial camera (3), the second industrial camera (6) and the third industrial camera (9) are used to perform appearance inspection on the middle frame of the fixture (10). There are three first industrial cameras (3) and five first detection light sources (4). The three first detection light sources (4) are evenly arranged side by side in the middle of the arc-shaped hanging plate (2). The first industrial cameras (3) are respectively arranged at both ends of the three first detection light sources (4). The first industrial cameras (3) are installed at the top end of the arc-shaped hanging plate (2). A first detection light source (4) is arranged between the two first industrial cameras (3) at the top of the arc-shaped hanging plate (2). The first detection light source (4) is installed at the bottom end of the arc-shaped hanging plate (2).

2. The optical detection device according to claim 1, characterized in that: There are four second detection light sources (7). Two second detection light sources (7) are installed on the inner walls of the front sides of the outer frame (1). There are two third detection light sources (8). The two third detection light sources (8) are installed on the inner walls of the front sides of the outer frame (1). The third detection light source (8) on each side is located between the corresponding two second detection light sources (7).

3. The optical detection device according to claim 1, characterized in that: The angle between the first industrial camera (3) located at the top end of the arc-shaped hanging plate (2) and the fixture (10) is 60.27°. The angle between the other first industrial camera (3) located at the top of the arc-shaped hanging plate (2) and the bracket of the fixture (10) is 114.83°. The first industrial camera (3) located at the bottom end of the arc-shaped hanging plate (2) is perpendicular to the fixture (10). The second industrial camera (6) is perpendicular to the fixture (10). The shooting angle of the third industrial camera (9) is 112.41° with the horizontal plane at the bottom front of the outer frame (1).

4. The optical detection device according to claim 1, characterized in that: The first detection light source (4) located at the top of the arc-shaped hanging plate (2) is perpendicular to the fixture (10). Among the three parallel first detection light sources (4), the angle between the top first detection light source (4) and the vertical axis of the fixture (10) is 112.04°, the angle between the top first detection light source (4) and the vertical axis of the fixture (10) is 84.2°, the angle between the top first detection light source (4) and the vertical axis of the fixture (10) is 65.11°, and the angle between the bottom first detection light source (4) and the vertical axis of the fixture (10) is 23.17°.

5. The optical detection device according to claim 1, characterized in that: The second detection light source (7) has an illumination angle of 35° with the top horizontal plane of the fixture (10), and the third detection light source (8) has an illumination angle perpendicular to the fixture (10).

6. The optical detection device according to claim 1, characterized in that: The first detection light source (4), the second detection light source (7) and the third detection light source (8) are all diffuse surface lights, and the first industrial camera (3), the second industrial camera (6) and the third industrial camera (9) are all CCD cameras.

Images