Middle frame, electronic device and visual identification device

Abstract

The utility model discloses a middle frame, which includes a middle frame body and ribs. The middle frame body has a first surface, the ribs are convexly arranged on the first surface, the ribs have a first side surface and a second side surface opposite to each other, the first side surface is adjacent to the edge of the middle frame body, and at least the first side surface is an inclined surface, and the reflectivity of the ribs is different from the reflectivity of the first surface. When light is irradiated to the ribs from the side, the light will be recognized as a white contour line with a certain width after being reflected by the first surface, and the other parts of the ribs are black, thereby making the contour of the ribs clear, and the black and white contrast is clear, the CCD can efficiently and quickly recognize the contour with high recognition accuracy, and achieve a high-precision positioning effect. The utility model also discloses an electronic device having the middle frame and a visual recognition device for identifying the middle frame.

Description

Technical Field

[0001] The utility model relates to the technical field of LCM assembly, and in particular to a middle frame, electronic equipment and a visual recognition device capable of improving recognition accuracy. Background Art

[0002] In the consumer electronics industry, uneven gaps often occur during LCM (LCD Module) assembly, which results in a small gap between the screen and the housing, squeezing the screen. To solve the uneven gap problem caused by LCM assembly, a CCD (Charge-coupled Device) positioning mechanism is often used. The CCD positioning mechanism is used to grasp the positioning structure of the middle frame so that it can correspond one-to-one with the corresponding matching position on the screen or back cover during assembly, thereby ensuring a uniform gap with the housing.

[0003] In the existing CCD positioning mechanism for identifying the middle frame, generally only one camera is used to identify local features. The camera or the middle frame needs to be moved and adjusted. The accuracy needs to consider the recognition accuracy of the camera body, the accuracy of the fixture, and the accuracy of the axis movement. Therefore, the overall recognition accuracy is poor. In addition, the traditional middle frame uses a groove structure for positioning. When the light source is irradiated from the center, the light cannot shine into the groove, and multiple light and dark lines will be formed; if a side light source is used, the intensity of the light reflected by the groove is low. Therefore, whether the axis center fill light or the side fill light, the groove outline and the surrounding plastic outline are not obvious or the outline is displayed but incomplete, the camera cannot capture clear lines, and the CCD error recognition rate increases.

[0004] In order to improve the recognition accuracy of CCD, another common method is to directly recognize the outer contour of the middle frame. However, the outer contour has burrs, poor shape accuracy, low reflection intensity of the appearance texture, etc., which also leads to low recognition accuracy and cannot meet the requirements of high-precision assembly.

[0005] Therefore, it is necessary to provide a middle frame, an electronic device and a visual recognition device that can improve the CCD recognition accuracy to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a middle frame which can improve the recognition accuracy of CCD.

[0007] Another object of the utility model is to provide a visual recognition device capable of improving the CCD recognition accuracy.

[0008] Another object of the utility model is to provide an electronic device capable of improving the CCD recognition accuracy.

[0009] To achieve the above object, the technical solution of the present utility model is: to provide a middle frame, which includes a middle frame main body and rib strips; wherein, the middle frame main body has a first surface; the rib strips protrude from the first surface, the rib strips have opposite first side surfaces and second side surfaces, the first side surface is close to the edge of the middle frame main body, at least the first side surface is an inclined surface, and the light reflectivity of the rib strips is different from that of the first surface.

[0010] Preferably, the first side surface extends obliquely downward from the top of the rib strip towards the edge of the middle frame main body, thereby increasing the reflection surface area of the first side surface, and the first side surface and the first surface have different light intensities in terms of the effect of reflecting light, so the black and white contrast is obvious, and the CCD can efficiently and quickly identify the contour features of the rib strips.

[0011] Preferably, both the first side surface and the second side surface are inclined surfaces, and the first side surface and the second side surface incline downward and in opposite directions from the top of the rib strip, and the slope of the first side surface is smaller than that of the second side surface, that is, the draft angle on the outer side of the rib strip is large and the draft angle on the inner side is small. In this way, during the processing of the middle frame, it can be quickly demolded, avoiding burr phenomena and contour breakage problems during the demolding process. At the same time, the reflection surface area of the first side surface is increased, and the first side surface and the first surface have different light intensities in terms of the effect of reflecting light, so the black and white contrast is obvious, and the CCD can efficiently and quickly identify the contour features of the rib strips, while the second side surface can reduce light reflection and avoid introducing more contour lines that affect CCD recognition.

[0012] Preferably, the width of the top of the rib strip is smaller than its bottom width.

[0013] Preferably, the light reflectivity of the rib strips is greater than that of the first surface. Therefore, the rib strips and the first surface have different light intensities in terms of the effect of reflected light, and the black and white contrast is obvious, improving the CCD recognition accuracy.

[0014] Preferably, the surface of the rib strips is a mirror structure, with a high light reflection intensity, ensuring that the light reflection intensity is higher than that of the first surface.

[0015] Preferably, the width of the rib strip is greater than 0.3 mm, and the height is greater than 0.05 mm and less than 0.3 mm. On the one hand, the rib strip plays a supporting role to prevent the problem of over-pressing of the back glue. On the other hand, it is a CCD recognition and positioning feature to ensure the concentricity accuracy between the screen and the middle frame during automatic screen pasting.

[0016] Preferably, the width L of the orthographic projection of the first side surface on the first surface satisfies: t < L < 2t, where t is the recognition accuracy of the camera, ensuring that the CCD recognition feature is not affected by the projection width.

[0017] Correspondingly, the utility model further provides an electronic device, comprising a display screen and the middle frame as described above, wherein the display screen is assembled on the first surface of the middle frame.

[0018] Correspondingly, the utility model also provides a visual recognition device for identifying the ribs on the middle frame as described above, the visual recognition device comprising at least two cameras and an aperture; at least two of the cameras are arranged opposite to a bearing surface for placing the middle frame; the aperture is in a circular shape and is arranged below each of the cameras, and a light-emitting surface of the aperture faces the bearing surface; when the light emitted by the aperture is irradiated on the middle frame, the different reflectivities of the first surface and the ribs make the reflected light have different light intensities, and each camera photographs each of the ribs to identify the contours of the ribs.

[0019] Preferably, the number of cameras and the position of each camera correspond to the ribs protruding from the first surface, and multiple cameras are used to separately identify the rib features of the middle frame. During the camera identification process, neither the frame nor the lens needs to be moved, thereby avoiding the introduction of fixture accuracy issues.

[0020] Preferably, the inner diameter of the aperture is greater than the outer diameter of the middle frame, so that the light emitted by the aperture illuminates the middle frame from the side, thereby enhancing the reflection effect of the first side and weakening the reflection effect of other parts of the rib.

[0021] Preferably, the light irradiated onto the first side surface is reflected and emitted upward, and is photographed by the camera and recognized as a contour line with a certain width, thereby obtaining the contour of the rib with distinct black and white, so that the contour of the rib is clearly displayed.

[0022] Preferably, the aperture includes a ring-shaped body and a plurality of LED lights installed on the bottom surface of the body. The ring-shaped aperture, on the one hand, ensures that the light intensity and angle at each position of the middle frame are fixed, and on the other hand, determines the optimal recognition contour features by controlling the LED light intensity and height, thereby ensuring the CCD recognition accuracy and correctness.

[0023] Preferably, the camera has a pixel of 2000W, a recognition accuracy of 0.01mm, a field of view within 0-50mm, and can meet high-precision positioning requirements.

[0024] Preferably, the visual recognition device further comprises a vertical frame and a horizontal frame connected to the vertical frame, and each of the cameras is installed on the horizontal frame at intervals.

[0025] Compared with the prior art, the middle frame of the utility model has convex ribs on its first surface as the identification and positioning features of the CCD, and the ribs have a first side surface adjacent to the edge of the middle frame body and an opposite second side surface, at least the first side surface is an inclined surface, and at the same time, the reflectivity of the ribs is different from the reflectivity of the first surface. Therefore, when light is irradiated to the ribs from the side, the light will be recognized as a white contour line with a certain width after being reflected by the first surface; while the light irradiated to the upper surface of the ribs, the light reflected by the ribs cannot be captured by the camera, and no new lines will be introduced. The light irradiation intensity on the second side of the ribs is the lowest, and the light reflection is not obvious, and no new lines will be introduced. The upper surface and the second side of the ribs are both black after being identified, so that the contour of the ribs is clearly displayed, and the black and white contrast is clear. The CCD can efficiently and quickly identify the contour with high recognition accuracy, and achieve a high-precision positioning effect.

[0026] Correspondingly, the electronic device having the above-mentioned middle frame also has the same technical effect.

[0027] The visual recognition device of the utility model, on the one hand, performs side fill light on the middle frame through an annular aperture, ensuring that the light intensity and angle at each position of the middle frame are fixed, and makes the light shine from the side to the first side of the rib, thereby enhancing the reflection effect of the first side, and weakening the reflection effect of other parts of the rib, thereby obtaining different light intensities and obvious black and white contrast, so that the camera can recognize the black and white distinct contour lines of the rib, ensuring the CCD recognition accuracy and correctness; on the other hand, the ribs on the middle frame are recognized separately by multiple cameras, and the frame and the lens do not need to be moved during the camera recognition process, thereby avoiding the introduction of fixture accuracy problems, further improving the recognition accuracy, and achieving high-precision positioning effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of a middle frame of an embodiment of the present utility model.

[0029] Figure 2 yes Figure 1 Enlarged schematic diagram of part A.

[0030] Figure 3 yes Figure 1 Top view of the .

[0031] Figure 4 is along Figure 3 Sectional view along line BB.

[0032] Figure 5 yes Figure 4 Enlarged schematic diagram of part C.

[0033] Figure 6 yes Figure 1 Schematic diagram of the state where the middle frame has adhesive backing.

[0034] Figure 7 yes Figure 6 Enlarged schematic diagram of part D in the figure.

[0035] Figure 8 yes Figure 6 Schematic diagram of the structure from another angle.

[0036] Fig. 9 yes Figure 8 sectional view of .

[0037] Fig.10 It is a structural schematic diagram of the visual recognition device of the utility model.

[0038] Fig.11 yes Fig.10 Schematic diagram of the usage status of the visual recognition device.

[0039] Fig.12 yes Fig.11 Schematic diagram of the structure from another angle.

[0040] Fig.13 yes Fig.10 Schematic diagram of the recognition principle of the visual recognition device.

[0041] Fig.14 yes Fig.10 Recognition effect diagram of the visual recognition device. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are now described with reference to the accompanying drawings, in which similar element numbers represent similar elements. It should be noted that the orientation descriptions involved in the present invention, such as the orientations or positional relationships indicated by up, down, left, right, front, and back, are all based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the technical solutions of the present application or / and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present application. The first, second, etc. described are only used to distinguish technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0043] Combination Figure 1-Figure 14As shown, the middle frame 100 in the present invention is a supporting frame of the electronic device, which is used to install the display screen of the electronic device, but is not limited to this. The visual recognition device 200 provided by the present invention is particularly suitable for identifying the positioning structure of the aforementioned middle frame 100, so as to facilitate accurate positioning during subsequent assembly. Of course, the visual recognition device 200 is also feasible for identifying other components.

[0044] Let's combine Figure 1-Figure 9 As shown, in one embodiment of the utility model, the middle frame 100 includes a middle frame body 110 and ribs 120. The middle frame body 110 has a first surface 111 and a second surface 112 opposite to each other in the thickness direction. The ribs 120 are convexly arranged on the first surface 111, and at least one rib 120 is provided. The reflectivity of the ribs 120 is different from the reflectivity of the first surface 111, specifically, the reflectivity of the ribs 120 is greater than the reflectivity of the first surface 111. Therefore, the ribs 120 and the first surface 111 have different light intensities in terms of reflected light effects, and the black and white contrast is obvious, thereby improving the CCD recognition accuracy.

[0045] Combination Figure 1-Figure 3 As shown, in this embodiment, each rib 120 is preferably convexly disposed near the edge of the middle frame body 110, and each rib 120 is preferably in an arc-shaped structure. Of course, the position and shape of the rib 120 are not limited to those in this embodiment.

[0046] Continue to combine Figure 1-Figure 3 As shown, in a specific embodiment of the utility model, three ribs 120 are convexly provided on the first surface 111, and the three ribs 120 are provided in a half area on one side of the center line of the middle frame body 110, and the three ribs 120 are evenly arranged along the radial direction of the middle frame body 110, that is, the center lines of two adjacent ribs 120 are arranged at an angle of 90°. Half of the area where the three ribs 120 are convexly provided on the first surface 111 is used to set the adhesive 130 (see Figure 6 , Figure 8 ), the adhesive 130 is used to fit the display screen, which is a conventional structure in the art and will not be described in detail. Of course, the number and arrangement of the ribs 120 are not limited to those in this embodiment.

[0047] Combination Figure 4-Figure 5 As shown, in one embodiment of the present invention, the rib 120 has a first side surface 121 and a second side surface 122 opposite to each other, the first side surface 121 is close to the edge of the middle frame body 110, the second side surface 122 is away from the edge of the middle frame body 110, and at least the first side surface 121 is an inclined surface. Fig.13As shown, the first side surface 121 arranged in an inclined plane can increase the reflective surface area, and because the reflectivity of the first side surface 121 and the first surface 111 is different, the two have different light intensities in the effect of reflecting light, so that the black and white contrast of the reflected light is obvious. The CCD can efficiently and quickly identify the contour features of the rib 120, and the contour of the rib 120 is clearly displayed.

[0048] See also Figure 5 As shown, in one embodiment, only the first side surface 121 of the rib 120 is an inclined surface, and the first side surface 121 extends downward from the top of the rib 120 to the edge direction of the middle frame body 110. In other words, the first side surface 121 is inclined relative to the vertical plane P1 and extends toward the edge of the middle frame body 110. As for the inclination angle formed between the first side surface 121 and the first surface 111, it is flexibly set according to the specific product. In this embodiment, the shapes of other parts of the rib 120 are not specifically limited. For example, its second side surface 122 can be an inclined surface or a vertical surface, and its top surface 123 can be a plane, an arc, etc.

[0049] Continue to view Figure 5 As shown, in a preferred embodiment, the first side surface 121 and the second side surface 122 of the rib 120 are both inclined. Specifically, the first side surface 121 extends downwardly from the top of the rib 120 to the edge direction of the middle frame body 110, and the second side surface 122 extends downwardly from the top surface 123 of the rib 120 to the center direction of the middle frame body 110. In other words, the first side surface 121 is inclined relative to the vertical plane P1 and extends toward the edge of the middle frame body 110, and the second side surface 122 is inclined relative to the vertical plane P2 and extends toward the center direction of the middle frame body 110. As a result, the width of the top surface 123 of the rib 120 is smaller than the bottom width. In this embodiment, the slope of the first side surface 121 is smaller than the slope of the second side surface 122, and the top surface 123 of the rib 120 is flat, so that the cross-section of the rib 120 is trapezoidal. This structural setting makes the outer draft angle of the rib 120 large and the inner draft angle small, so that the middle frame 100 can be demolded quickly during the molding process, avoiding burrs and contour damage during the demolding process. At the same time, the reflection surface area of ​​the first side surface 121 is increased, so that the light reflected by the first side surface 121 is a white line with a certain width (see below for details), and the first side surface 121 and the first surface 111 have different light intensities in the effect of reflecting light, so the black and white contrast is obvious, and the CCD can efficiently and quickly identify the contour features of the rib 120, and the contour of the rib 120 is clearly displayed. The inclined setting of the second side surface 122 minimizes light reflection as much as possible while facilitating rapid demolding, avoiding the introduction of more contour lines that affect CCD recognition.

[0050] Combination Figure 4-Figure 9As shown, in a preferred embodiment, the maximum width W of the rib 120 is greater than 0.3 mm, the height H is greater than 0.05 mm and less than 0.3 mm. Refer to Figure 5 As shown. In one embodiment, the thickness of the back glue 130 formed on the middle frame body 110 is 0.3 mm. Therefore, the height of the rib 120 is less than the thickness of the back glue 130. Refer to Fig. 9 As shown. On the one hand, the function of the rib 120 is to play a supporting role to prevent the problem of over-pressing of the back glue 130. On the other hand, it is a CCD recognition and positioning feature to ensure the concentricity accuracy between the display screen and the middle frame 100 during automatic screen pasting.

[0051] Refer to Figure 5 As shown, in this preferred embodiment, when setting the rib 120 protruding from the first surface 111, it is also necessary to correspond to the recognition accuracy of the camera. Specifically, the width L of the positive projection of the first side surface 121 on the first surface 111 needs to satisfy: t < L < 2t, where t is the recognition accuracy of the camera. Thus, it is ensured that the CCD recognition feature is not affected by the projection width. Of course, the size of the rib 120 is not limited to that in this specific embodiment.

[0052] Continuing to refer to Figure 1-Figure 5 As shown, in the present utility model, the rib 120 and the middle frame body 110 can be formed of the same material or can be formed of different materials respectively. However, the surface texture of the rib 120 is at least guaranteed to be SPI-A2 or higher requirements. In one embodiment, the surface texture of the rib 120 is SPI-A2, whereby the surface of the rib 120 has a mirror structure and the light reflection intensity is relatively high, ensuring that the light reflection intensity is higher than that of the first surface 111.

[0053] Referring again to Figure 1-Figure 9 As shown, the present utility model also provides an electronic device, which includes a display screen and a middle frame 100. The middle frame 100 is the support framework of the electronic device, and its structure is as described above and will not be described repeatedly. The display screen is assembled on the first surface 111 of the middle frame 100. The structure of the display screen and the assembly manner between the display screen and the middle frame 100 and the like are all conventional manners in the art, so no detailed description will be given.

[0054] Next, referring to Figure 10-13As shown, in the utility model, the visual recognition device 200 includes a camera 210 and an aperture 220. At least two cameras 210 are provided, and at least two cameras 210 are provided opposite to the bearing surface 240 for placing the middle frame 100. The aperture 220 is in a circular shape and is provided below each camera 210, and the light emitting surface of the aperture 220 faces the bearing surface 240. After the middle frame 100 is placed on the bearing surface 240, the light emitted by the aperture 220 is irradiated on the bearing surface 240, so that the light is irradiated on the middle frame 100 from the side. Due to the different reflectivities of the first surface 111 of the middle frame 100 and the ribs 120, the reflected light has different light intensities. Each camera 210 shoots each rib 120 to identify the contours of each rib 120.

[0055] Continue to view Figure 10-12 As shown, in the present utility model, the visual recognition device 200 also includes a mounting bracket 230, and the mounting bracket 230 is used to mount each camera 210. Specifically, the mounting bracket 230 includes a vertical frame 231 fixed to the bearing surface 240 and a horizontal bracket 232 connected to the vertical frame 231, and the horizontal bracket 232 protrudes above the bearing surface 240. The structure of the horizontal bracket 232 is not specifically limited. Each camera 210 is installed on the horizontal bracket 232 at intervals. More specifically, the number of the cameras 210 and the position of each camera 210 correspond to each rib 120 protruding on the middle frame 100, and multiple cameras 210 are used to respectively identify the ribs 120 on the middle frame 100. During the recognition process of the camera 210, the frame 100 and the lens do not need to move, thereby avoiding the introduction of fixture accuracy problems.

[0056] Continue to view Figure 10-12 As shown, in one embodiment of the utility model, the visual recognition device 200 is used to identify the middle frame 100 having three ribs 120. Therefore, three cameras 210 are set. The three cameras 210 are installed on the horizontal bracket 232 at intervals, and the vertical distances from the cameras 210 on both sides to the bracket 230 are greater than the vertical distance from the camera 210 in the middle to the bracket 230, while the vertical distances from the cameras 210 on both sides to the bracket 230 are the same. So that in the orthographic projection plane of the bearing surface 240, the three cameras 210 are arranged at an angle of 90° in sequence. In this way, after the middle frame 100 is placed on the bearing surface 240, the three cameras 210 can be located directly above the three ribs 120, and each camera 210 shoots and identifies a rib 120 respectively.

[0057] It is understandable that in other embodiments, the number and position layout of the cameras 210 are adjusted accordingly according to the number and arrangement of the ribs 120 .

[0058] In the present invention, the pixel of the camera 210 is preferably 2000W, the recognition accuracy is 0.01mm, and the field of view is within 0-50mm. When the three cameras 210 respectively shoot and recognize the three ribs 120 on the middle frame 120, the three cameras 210 and their lenses and the middle frame 120 do not need to move, thereby avoiding the introduction of fixture accuracy problems, ensuring the accuracy of the recognized contour, and meeting the high-precision positioning requirements. In comparison, the prior art only uses one camera 210 with a recognition accuracy of 0.03mm and a product field of view of 0-150mm. During the recognition process, the camera 210 or the middle frame 120 needs to be moved and adjusted, and the recognition accuracy is poor.

[0059] Continue to combine Figure 10-12 As shown, in the utility model, the aperture 220 includes a body 221 in the shape of a ring and a plurality of LED lamps 222 mounted on the bottom surface of the body 221. Moreover, the inner diameter of the aperture 220 is much larger than the outer diameter of the middle frame 100. Therefore, when the middle frame 100 is placed on the bearing surface 240, the light emitted by the annular aperture 220 is emitted downward, so that the light illuminates the middle frame 100 from the side, thereby enhancing the reflection effect of the first side 121 and weakening the reflection effect of other parts on the rib 120. At the same time, the annular aperture 220 can ensure that the light intensity and angle of each position on the middle frame 100 are fixed. The setting of multiple LED lamps 222 can determine the best recognition contour features by controlling the light intensity and height of the LED lamps 222, thereby ensuring the CCD recognition accuracy and correctness.

[0060] Combine the following Figure 1-Figure 14 As shown, when the visual recognition device 200 of the present invention is in use, the middle frame 100 is placed on the bearing surface 240 and is located below each camera 210. In addition, by adjusting the position of the middle frame 100, the three ribs 120 on the first side surface 121 are located directly below the three cameras 210, that is, the middle rib 120 is located directly below the middle camera 210, and the ribs 120 on both sides are located directly below the cameras 210 on both sides, as shown in FIG. Fig.12 At the same time, the focal length of each camera 210 is adjusted according to the width of the rib 120, so that each camera 210 can shoot the first side surface 121 of the rib 120, and there is no need to shoot the second side surface 122 of the rib 120, as shown in FIG. Fig.13 shown.

[0061] Combination Figure 10-Figure 14 As shown, when the annular aperture 220 emits light, the light emitted by it is emitted downward to the bearing surface 240. Since the inner diameter of the aperture 220 is much larger than the outer diameter of the middle frame 100, the light is illuminated from the side of the middle frame 100. Fig.13As shown in FIG. 1 , the first side surface 121 of the middle frame 100 is inclined and has a high reflectivity, so the light irradiated on the first side surface 121 is reflected and emitted upward, and is recognized as a white outline with a certain width after being photographed by the camera 210, as shown in FIG. Fig.14 At the same time, light is irradiated from the side to the top surface 123 of the rib 120, and after reflection, it is emitted to the inner side of the middle frame body 110. This part of the light cannot be captured by the camera 210, so no new characteristic lines are introduced; and the second side 122 of the rib 120 has the lowest light irradiation intensity, and the light reflection is relatively unobvious, and no new characteristic lines are introduced. Finally, after being photographed and recognized by the camera 210, a white contour line with a certain width formed by the reflection of the first side 121 is obtained, while the top surface 123 and the second side 122 of the rib 120 are black, so a distinct black and white contour of the rib 120 is obtained, as shown Fig.14 As shown, the outline of the rib 120 is clearly shown. Fig.14 It can also be clearly seen that the edge outline of the back glue 130 has thickness, and the surface of the back glue 130 is black.

[0062] In summary, the middle frame 100 of the present invention has a rib 120 protruding on its first surface 111 as a recognition and positioning feature of the CCD, and the rib 120 has a first side surface 121 adjacent to the edge of the middle frame body 110 and an opposite second side surface 122, at least the first side surface 121 is an inclined surface, and the reflectivity of the rib 120 is different from the reflectivity of the first surface 111. Therefore, when light is irradiated to the rib 120 from the side, the light will be recognized as a contour line with a certain width after being reflected by the first surface 111; while the light irradiated to the upper surface of the rib 120, after being reflected by the top surface 123 of the rib 120, cannot be captured by the camera 210, and no new lines will be introduced. The light irradiation intensity of the second side surface 122 of the rib 120 is the lowest, and the light reflection is not obvious, and no new lines will be introduced. The upper surface 123 and the second side surface 122 of the rib 120 are both black after being identified. As a result, the contour of the rib 120 is formed by the light reflected by the first surface 111 without introducing multiple characteristic lines. The rib 120 is displayed clearly with a clear black and white contrast. The CCD can efficiently and quickly identify the contour with high recognition accuracy, thereby achieving a high-precision positioning effect.

[0063] Correspondingly, the electronic device having the above-mentioned middle frame 100 also has the same technical effect.

[0064] The visual recognition device 200 of the present invention, on the one hand, uses the annular aperture 220 to perform side fill light on the middle frame 100, ensuring that the light intensity and angle at each position of the middle frame 100 are fixed, and makes the light shine from the side to the first side 121 of the rib 120, thereby enhancing the reflection effect of the first side 121, and weakening the reflection effect of other parts of the rib 120, thereby obtaining different light intensities and obvious black and white contrast, so that the camera 21 can recognize the clear outline of the rib 120, ensuring the recognition accuracy and correctness of the CCD; on the other hand, multiple cameras 210 are used to respectively identify the ribs 120 on the middle frame 100. During the recognition process of the camera 210, the frame 100 and the lens do not need to be moved, thereby avoiding the introduction of fixture accuracy problems, further improving the recognition accuracy, and achieving high-precision positioning effects.

[0065] The structures of other parts of the visual recognition device 200 involved in the present invention are conventional structures well known to ordinary technicians in the field, and will not be described in detail here.

[0066] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention are still within the scope covered by the present invention.

Claims

1. A middle frame, characterized in that: Comprising: A middle frame body having a first surface; A rib protruding from the first surface, the rib having opposite first and second side surfaces, the first side surface being adjacent to the edge of the middle frame body, at least the first side surface being inclined, and the light reflectance of the rib being different from that of the first surface.

2. The middle frame according to claim 1, characterized in that: The first side surface extends obliquely downward from the top of the rib towards the edge of the middle frame body.

3. The middle frame according to claim 1, characterized in that: Both the first side surface and the second side surface are inclined, and the first side surface and the second side surface incline downward and in opposite directions from the top of the rib, and the slope of the first side surface is less than that of the second side surface.

4. The middle frame according to claim 1, characterized in that: The width of the top of the rib is less than the width of its bottom.

5. The middle frame according to claim 1, characterized in that: The light reflectance of the rib is greater than that of the first surface.

6. The middle frame according to any one of claims 1 to 4, characterized in that: The width L of the positive projection of the first side surface on the first surface satisfies: t < L < 2t, where t is the recognition accuracy of the camera.

7. A visual recognition device for identifying the ribs on the middle frame according to any one of claims 1 to 6, characterized in that: Comprising: At least two cameras, at least two of the cameras being disposed opposite to the bearing surface for placing the middle frame; An aperture, the aperture being annular and disposed below each of the cameras, and the light-emitting surface of the aperture facing the bearing surface; When the light emitted by the aperture irradiates the middle frame, the different reflectivities of the first surface and the rib cause the reflected light to have different light intensities, and each camera captures each rib to identify the contour of the rib.

8. The visual recognition device according to claim 7, characterized in that: The number of the cameras and the positions of each of the cameras correspond to each of the ribs protruding from the first surface.

9. The visual recognition device according to claim 7, characterized in that: The inner diameter of the aperture is greater than the outer diameter of the middle frame, so that the light emitted by the aperture irradiates the middle frame from the side.

10. An electronic device comprising a display screen, characterized in that: It further includes a middle frame according to any one of claims 1-6, and the display screen is assembled on the first surface of the middle frame.

Images