A light source module for detecting appearance defects of mobile phone panels

Abstract

The present invention relates to the field of mechanical vision detection technology, and specifically to a light source module for detecting appearance defects of mobile phone panels. The present invention provides a light source module for detecting appearance defects of mobile phone panels, comprising a lamp body, a lamp shell and a lamp board, wherein the lamp boards are distributed in multiple layers from bottom to top inside the lamp shell, each layer of the lamp boards constitutes a trapezoidal light-emitting surface, and the angle between the lamp boards of each layer and the horizontal plane changes from large to small from bottom to top; and a conversion component, comprising a rotatably arranged support member, on the outer periphery of the support member are fixedly provided a plurality of the lamp bodies distributed at intervals, wherein the light source colors of the lamp boards of the lamp bodies are different, and when the support member is rotated, the plurality of the lamp bodies can be switched to be placed directly above the mobile phone panel; the present invention can effectively solve the shortcomings of existing mechanical vision light sources in the actual application of mobile phone surface detection.

Description

Technical Field

[0001] The present invention relates to the technical field of machine vision detection, and in particular to a light source module for detecting appearance defects of a mobile phone panel. Background Art

[0002] Machine vision inspection of the appearance of mobile phone panels is an efficient and accurate inspection method. It uses a machine vision system to automatically inspect mobile phone panels to identify and classify various defects, such as scratches, abrasions, foreign matter, dirt, color differences, flatness problems, etc. When inspecting the contour and surface defects of mobile phone panels, a ring light source is often used to illuminate the panel body in a ring manner. The ring light source illuminates the object to be inspected in a ring manner to produce uniform lighting, which can avoid shadows, highlight imaging features, and achieve high-quality image acquisition and detection accuracy.

[0003] However, the existing mechanical vision light source has the following shortcomings in the use of mobile phone panel inspection. First, the currently used ring light source is mostly a single-layer surface light source. For the inspection of the appearance of the mobile phone panel, and because there are multiple electronic components on the surface of the mobile phone panel, the light spot of the surface light source is uneven on its surface, making the characteristics of the mobile phone panel unclear. Second, the currently used ring light source is a monochromatic white light source, which can be used for the appearance defect inspection of most mobile phone panels, such as scratches, stains, cracks, etc. However, for small scratch defects generated on metal frames or metal layers, or scratches or stains on the glass surface of the mobile phone panel, it is difficult to obtain a high-contrast image with a white light source, resulting in reduced accuracy and reliability of the inspection. Summary of the invention

[0004] Technical issues solved

[0005] In view of the above-mentioned shortcomings of the prior art, the present invention provides a light source module for detecting appearance defects of mobile phone panels, which can effectively solve the shortcomings of existing mechanical vision light sources in actual application of mobile phone surface detection.

[0006] Technical Solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a light source module for detecting appearance defects of mobile phone panels, comprising a lamp body, a lamp housing and a lamp board, wherein the lamp boards are distributed in multiple layers from bottom to top inside the lamp housing, each layer of the lamp boards forms a trapezoidal light-emitting surface, and the angle between the lamp boards of each layer and the horizontal plane decreases from large to small from bottom to top;

[0009] And a conversion component, including a rotatable support member, on the outer circumference of which a plurality of lamp bodies are fixedly arranged at intervals, wherein the light source colors of the lamp panels of the lamp bodies are different, and when the support member rotates, the plurality of lamp bodies can be switched to be placed directly above the mobile phone panel.

[0010] Furthermore, the lamp board is provided with three layers inside the lamp housing, wherein from bottom to top, the angle between the lamp board of the first layer and the horizontal plane is 75° to 85°, the angle between the lamp board of the second layer and the horizontal plane is 40° to 50°, and the angle between the lamp board of the third layer and the horizontal plane is 25° to 35°.

[0011] Furthermore, the conversion assembly also includes a first support, an axle seat, an arc-shaped slide rail and a slider. The axle seat is fixedly arranged on the top of the first support, and the slider can be slidably arranged on the arc-shaped slide rail. One end of the support member is rotatably connected to the axle seat, and the other end is connected to the bottom surface of the slider. The axis center of the axle seat is the center center of the arc-shaped slide rail. When the slider moves on the arc-shaped slide rail, it drives the support member to rotate along the axle seat.

[0012] Furthermore, the support member is a fan-shaped annular plate, the support member is coaxially distributed with the arc-shaped slide rail, a plurality of connection frames corresponding to the lamp body are arranged on the outside of the support member, one side of the connection frame is fixed to the bottom surface of the support member, and the other side main body extends out of the support member, and the connection frame and the top surface of the lamp shell are commonly provided with a first connection hole.

[0013] Furthermore, a Y-shaped guide groove is provided on the support member on one side close to the shaft seat, and also includes a sliding column. The Y-shaped guide groove includes a first groove body and a second groove body and a third groove body that are connected and symmetrically forked to both sides. The sliding column moves linearly along the first groove body. When the sliding column moves into the second groove body or the third groove body, it can drive the support member to rotate.

[0014] Furthermore, it also includes an adjustment block, which is fixed on the upper side of the Y-shaped guide groove and has a consistent Y-shaped guide groove. The middle part of the side of the adjustment block is symmetrically provided with a receiving groove that communicates with the Y-shaped guide groove. Limiting blocks are rotatably connected in the two receiving grooves, and the limiting blocks are horizontally symmetrically distributed.

[0015] Among them, by rotating the limit block on one side into the Y-shaped guide groove, the second groove body or the third groove body on the corresponding side can be blocked, so that the opposite side remains open and communicates with the first groove body.

[0016] Furthermore, the relative inner side surface of the limit block is a continuous fitting surface, and the top surface of the limit block is an inclined limit surface. When the limit block blocks the second groove body on the corresponding side, the limit surface fits the inner side surface of the second groove body. One side of the fitting surface of the limit block is flush with the inner side surface of the first groove body, and then transitions to be flush with the inner side surface of the third groove body, so that the first groove body and the third groove body form a continuous bending channel.

[0017] Furthermore, one end of the limit block is rotatably arranged in the accommodating groove in cooperation with the torsion spring. When the torsion spring is in a natural state, the limit block is received in the accommodating groove. An elongated circular groove penetrating the top surface of the limit block is opened at the accommodating groove. An extrusion block is fitted in the gap of the elongated circular groove. The movement of the extrusion block along the elongated circular groove can realize the telescopic conversion of the limit block in the Y-shaped guide groove. The upper sides of the two extrusion blocks are commonly connected with an offset moving structure, and the offset moving structure can realize the opposite movement of the two extrusion blocks; wherein, the contact surface between the extrusion block, the limit block and the elongated circular groove is a plane.

[0018] Furthermore, the offset moving structure includes a support frame, a first rack and a second rack. The support frame is fixedly mounted on the upper side of the adjusting block. The support frame is provided with a strip groove for the extrusion block to extend out. A circular gear is rotatably arranged in the middle part of the support frame. The first rack and the second rack are respectively fixed on the two extrusion blocks. The inner sides of the first rack and the second rack are meshed with the circular gear, wherein the outer side of the first rack is linked with a direct-acting electromagnet.

[0019] Furthermore, a circular hole penetrating the adjusting block is formed at the end of the Y-shaped guide groove, and a spring buffer is fixed at the corresponding position of the adjusting block. When the damping shaft of the spring buffer is in a natural state, one end of the damping shaft passes through the circular hole into the Y-shaped guide groove, and a micro switch is arranged at an interval at the other end of the damping shaft. When the sliding column moves to the end of the Y-shaped guide groove and presses the damping shaft on the corresponding side outward, the outer end of the damping shaft touches the micro switch to operate.

[0020] Beneficial Effects

[0021] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0022] This solution improves the structure of the lamp body and designs a multi-layer light-emitting surface light board. Each layer of the light board constitutes a trapezoidal light-emitting surface, and each layer of the light board presents three light-emitting angles: low, medium and high. The lamp beads at three different angles are illuminated on the mobile phone panel, making the surface features of the mobile phone panel clearly visible.

[0023] At the same time, by designing a conversion component for switching multiple lamp bodies to "operating points", by installing lamp body light sources of different colors on its supporting parts, according to the material of the mobile phone panel or the requirements of the detection target, the corresponding light source is switched to the top of the mobile phone panel through the conversion component for lighting, which is convenient for the CCD industrial camera edge CCD camera to collect higher contrast images to improve the accuracy and reliability of detection. At the same time, the rapid switching of multi-color light sources at a single workstation can also greatly improve the detection efficiency of mobile phone panels. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is a perspective view of the overall structure of the light source module of this embodiment from the top;

[0026] Figure 2 This is a bottom perspective view of the overall structure of the light source module of this embodiment;

[0027] Figure 3 This is a side view of the light source module of this embodiment in conjunction with a CCD industrial camera;

[0028] Figure 4 This is a schematic diagram of the connection between the lamp body and the connection frame of this embodiment;

[0029] Figure 5 is a schematic cross-sectional view of the lamp body of this embodiment;

[0030] Figure 6 It is a schematic diagram of the dislocation movement structure on the conversion component body of this embodiment;

[0031] Figure 7 This is a top view of the partially hidden support frame of the dislocation moving structure of this embodiment;

[0032] Figure 8 It is a top view schematic diagram of the state of two limit blocks under the control of the dislocation moving structure of this embodiment;

[0033] Fig. 9 It is a perspective view of the state of two limit blocks under the control of the dislocation moving structure of this embodiment;

[0034] Fig.10 is a perspective view of the main body of the adjustment block of this embodiment;

[0035] Fig.11It is a schematic diagram of the movement cooperation between the extrusion block and the limit block of this embodiment;

[0036] Fig.12 This is a partial cross-sectional schematic diagram of the spring buffer of this embodiment connected to the end of the adjustment block;

[0037] Fig.13 This is a schematic diagram of the installation of the support member and the arc-shaped slide rail of this embodiment;

[0038] Fig.14 This is a schematic diagram of the white lamp body of this embodiment at the working point;

[0039] Fig.15 This is a schematic diagram of the blue lamp body of this embodiment at the working point;

[0040] The numbers in the figure represent: 10, lamp body; 11, lamp housing; 12, lamp board; 13, light homogenizing plate; 20, support member; 21, Y-shaped guide groove; 211, first groove body; 212, second groove body; 213, third groove body; 30, first support; 31, shaft seat; 32, arc-shaped slide rail; 33, slider; 34, fixed head; 35, connecting frame; 36, first connecting hole; 40, adjusting block; 41, containing groove; 42, limiting block; 421, fitting surface; 422, limiting surface; 43 , long circular groove; 44, extrusion block; 441, contact surface; 45, round hole; 50, slide module; 51, moving pair; 52, slide column; 53, second support; 60, offset moving structure; 61, support frame; 62, first rack; 63, second rack; 64, direct-acting slide rail; 65, direct-acting electromagnet; 66, circular gear; 70, spring buffer; 71, base; 72, spring; 73, damping shaft; 80, micro switch; 90, CCD industrial camera; 100, object to be detected. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The present invention will be further described below in conjunction with the embodiments.

[0043] Example:

[0044] The present invention provides a light source module for detecting appearance defects of mobile phone panels, which is mainly used in automated or semi-automated detection of mobile phone panels in cooperation with a mechanical vision system. The entire module mainly includes a lamp body 10 with multiple light sources of different colors, and a fast actuator for switching different lamp bodies 10 to an "operating point". The "operating point" here is coaxial and located in the middle of a CCD industrial camera and a mobile phone panel assembly to be inspected, so as to illuminate the mobile phone panel to be inspected, and the CCD industrial camera performs image acquisition. The mechanical vision inspection system obtains an image of the mobile phone panel through a CCD industrial camera, and then uses image processing technology and algorithms to analyze and process the image to identify various defects on the mobile phone panel, such as scratches, abrasions, foreign matter, dirt, color differences, flatness problems, etc., which will not be elaborated here. In addition, it is worth explaining that the conversion assembly in the present scheme is a protruding fan-shaped mechanism body as a whole, and multiple lamp bodies 10 are fixed on the outer periphery of the support member 20, and the switching between the lamp bodies 10 is achieved by rotating the support member 20. The main body of the present mechanism is designed according to the actual automatic detection production line space and process. Because ordinary gantry support and translational displacement structures will interfere with the robot's operation of taking and placing the mobile phone panel, as well as the installation and fixation of the CCD industrial camera, the mechanism of the present scheme forms an "open" structure that can well leave space for the robot and the CCD industrial camera.

[0045] The light source module of this solution will be specifically described by an embodiment as follows:

[0046] Reference Figure 1-5 , wherein the structures of multiple lamp bodies 10 are consistent, and the main body includes a lamp housing 11 and a lamp board 12, and only the luminous color of the lamp board 12 is different. The improvement of the lamp body 10 in this scheme is to improve the imaging effect of the mobile phone panel feature. The lamp boards 12 are distributed in multiple layers from bottom to top inside the lamp housing 11, and each layer of the lamp boards 12 constitutes a trapezoidal luminous surface, and the angle between each layer of the light boards 12 and the horizontal plane changes from large to small from bottom to top. Among them, in this embodiment, the main body of the lamp housing 11 is preferably designed to be a square hollow structure, and the lamp board 12 is fixed along the four inner walls of the shell. A uniform light plate 13 is arranged on the outside of the lamp board 12, and four lamp boards 12 at each angle form a trapezoidal luminous surface, and the brightness of each layer of the light board 12 can be independently controlled. In the present embodiment, three layers of light boards 12 are arranged inside the lamp housing 11, wherein in the present embodiment, preferably, from bottom to top, the angle between the first layer of light boards 12 and the horizontal plane is 80°, that is, the angle between the second layer of light boards 12 and the horizontal plane is 45°, and the angle between the third layer of light boards 12 and the horizontal plane is 30°. The lamp beads at three different angles are used to illuminate the mobile phone panel, so that the surface features of the mobile phone panel are clearly visible.

[0047] It also includes a conversion component mainly used for switching the lamp body 10, and the conversion component mainly includes a support member 20, a first support seat 30, an axle seat 31, an arc-shaped slide rail 32 and a slider 33. The support member 20 is used for supporting the light source module and installing and fixing the lamp body 10, wherein the main body of the support member 20 is rotatably arranged, and a plurality of lamp bodies 10 are fixedly arranged at intervals on the outer periphery of the support member 20. When the support member 20 rotates, the plurality of lamp bodies 10 can be switched to be placed directly above the mobile phone panel.

[0048] Specifically, in the design of realizing the rotation connection of the support member 20, the support member 20 is preferably designed as a fan-shaped plate body in this embodiment. The main body of the support member 20, which is a fan-shaped main body with a larger area, is formed by bending a 3mm thin plate and welding reinforcing ribs on the bottom surface. The fan-shaped appearance can reduce the space occupied by the support member 20 during the rotation process as much as possible. In the connection, by fixing the shaft seat 31 on the top of the first support 30, the slider 33 is slidably set on the arc-shaped slide rail 32, one end of the small head of the support member 20 is rotatably connected to the shaft seat 31 through a bearing and a retaining spring, and the other end is fixed to the bottom surface of the slider 33 through a screw. The axis of the shaft seat 31 is the center of the arc-shaped slide rail 32. When the slider 33 moves on the arc-shaped slide rail 32, it can drive the support member 20 to rotate along the shaft seat 31. In this way, multiple lamp bodies 10 fixed on the outer periphery of the support member 20 can be rotated and displaced. Among them, the two ends of the arc-shaped slide rail 32 are fixedly connected to the housing of the device through a tubular fixing head 34 during installation.

[0049] In the connection between multiple lamp bodies 10 and support members 20, the support members 20 are coaxially distributed with the arc-shaped slide rails 32, and multiple connection frames 35 corresponding to the lamp bodies 10 are arranged on the outside of the support members 20. One side of the connection frame 35 is fixed to the bottom surface of the support member 20, and the main body on the other side is extended to the outside of the support member 20, so that the support member 20 will not block the hollow area of ​​the lamp body 10, ensuring the picture shooting of the CCD industrial camera located on the upper side. Among them, the connection frame 35 and the top surface of the lamp housing 11 are commonly provided with a first connection hole 36, and the two are fixed by screws, which is convenient for disassembly and assembly of the lamp body 10.

[0050] The following is the design of the mechanism of how the support member 20 drives multiple lamp bodies 10 to perform rapid switching: In this embodiment, three spaced lamp bodies 10 are preferably mounted on the support member 20, and a Y-shaped guide groove 21 is provided on the support member 20 on the side close to the shaft seat 31. The Y-shaped guide groove 21 includes a first groove body 211 and a second groove body 212 and a third groove body 213 that are connected and symmetrically forked on both sides. The three lamp bodies 10 can be rotated to the "operating point" and positioned respectively by utilizing the guiding effect of the three angles of the Y-shaped guide groove 21.

[0051] A linear motion slide post 52 is also provided to cooperate with the Y-shaped guide groove 21. The linear motion of the slide post 52 is used to realize the rotation of the support member 20 and maintain it at a certain angle. Specifically, when the slide post 52 is located in the first groove body 211, the support member 20 is in a straightened posture. At this time, the lamp body 10 located in the middle is in the "operating point"; when the slide post 52 moves to the second groove body 212 or the third groove body 213, it drives the support member 20 to rotate in two directions respectively, and the lamp body 10 on the left or right side is in the "operating point", thereby realizing the effect of switching the lamp body 10.

[0052] Reference Figure 6-13 Since the support member 20 is a thin-walled sheet metal member, a thicker adjustment block 40 is added as a guide member for the rotation and displacement of the support member 20. The adjustment block 40 is fixed on the upper side of the Y-shaped guide groove 21, and a consistent Y-shaped guide groove 21 is opened; when the slide column 52 moves from the first groove body 211 to the fork of the Y-shaped guide groove 21, how to control it to move to the second groove body 212 or the third groove body 213, this part also determines which color of the lamp body 10 is switched as the light source.

[0053] Therefore, how to control the direction of the slide column 52 is the key to switch different lamp bodies 10. In this embodiment, a receiving groove 41 is symmetrically opened in the middle of the side of the adjustment block 40 and communicated with its Y-shaped guide groove 21. The two receiving grooves 41 are both rotatably connected to the limit blocks 42, and the two limit blocks 42 are horizontally symmetrically distributed; wherein, by rotating the limit block 42 on one side into the Y-shaped guide groove 21, the second groove body 212 or the third groove body 213 on the corresponding side can be blocked, so that the opposite side remains open and communicates with the first groove body 211. Thus, the limit block 42 is used to block the groove body on this side, while a continuous bending channel is formed on the other side, guiding the slide column 52 into the bending channel, driving the support member 20 and the lamp body 10 to rotate at a certain angle. wherein, the slide column 52 is linked and arranged on a linear slide, and the linear slide is arranged parallel to the lower side of the support member 20, and its bottom is fixed on the first support 30 through the second support 53.

[0054] In order to achieve high efficiency and accuracy in positioning, blocking and guiding the limit block 42 in the Y-shaped guide groove 21, the relative inner side surface of the limit block 42 is a continuous fitting surface 421, and the top surface of the limit block 42 is an inclined limit surface 422. When the limit block 42 rotates and blocks the second groove body 212 on the corresponding side, the limit surface 422 fits the inner side surface of the second groove body 212, and one side of the fitting surface 421 of the limit block 42 is flush with the inner side surface of the first groove body 211, and then transitions to be flush with the inner side surface of the third groove body 213, so that the first groove body 211 and the third groove body 213 form a continuous bending channel; of course, when the symmetrical limit block 42 blocks the third groove body 213, the first groove body 211 and the second groove body 212 will also form a continuous bending channel.

[0055] How to achieve the two limit blocks 42 to keep one side naturally contracted into the receiving groove 41, and the other side rotates to block the groove body on the corresponding side. In this embodiment, one end of the limit block 42 is designed to be rotated in the receiving groove 41 in cooperation with the torsion spring. When the torsion spring is in the natural state, the limit block 42 is stored in the receiving groove 41. The receiving groove 41 is provided with an oblong groove 43 that passes through the top surface of the limit block 42. The oblong groove 43 is provided with an extrusion block 44 in the gap. The extrusion block 44 moves along the oblong groove 43 to achieve the telescopic conversion of the limit block 42 in the Y-shaped guide groove 21. Among them, the contact surface 441 of the extrusion block 44, the limit block 42 and the oblong groove 43 is a plane. The design of the plane contact surface 441 provides a stable surface support for the rotationally blocked limit block 42. When the sliding column 52 is guided and moved along the contact surface 421 of the limit block 42, the limit block 42 will not deflect or shift to ensure smooth operation.

[0056] In order to realize the staggered opening and closing of the two limit blocks 42, the upper sides of the two extrusion blocks 44 need to be connected with a staggered moving structure 60, and the staggered moving structure 60 can realize the opposite movement of the two extrusion blocks 44;

[0057] Specifically, the dislocation moving structure 60 includes a support frame 61 of sheet metal structure, and a first rack 62 and a second rack 63. The support frame 61 is fixedly mounted on the upper side of the adjustment block 40. The support frame 61 is provided with a strip groove for the extrusion block 44 to extend out. A circular gear 66 is rotatably arranged in the middle part of the support frame 61. The first rack 62 and the second rack 63 are respectively fixed on the two extrusion blocks 44. The inner sides of the first rack 62 and the second rack 63 are meshed with the circular gear 66. In this way, the first rack 62 moves forward, and pushes the extrusion block 44 out of the limit block 42 to block the second slot body 212. Through the transmission of the gear, the second rack 63 on the other side moves backward, so that the extrusion block 44 is separated from the limit block 42. The limit block 42 retracts into the accommodating groove 41 under the action of the restoring force of the torsion spring, so that the first slot body 211 and the third slot body 213 are connected.

[0058] In the selection of the actuator, in this embodiment, a direct-acting electromagnet 65 is preferably linked to the outer side of the first rack 62. The direct-acting electromagnet 65 is a bidirectional holding type direct-acting electromagnet 65, which has stable operation and fast response. In addition, in order to improve the stability of the forward and backward movement of the first rack 62 and the second rack 63, linear guides are installed on the support frames 61 on both sides thereof to make the two move more smoothly.

[0059] Reference Fig.12In order to prevent the sliding column 52 from moving to the bottom of each groove body of the Y-shaped guide groove 21 and causing a rigid collision, in this embodiment, a spring 72 buffer 70 is added to the end of the adjustment block 40, and the spring 72 buffer 70 includes a base 71, a spring 72 and a damping shaft 73. A through stepped groove is formed on the inner side of the base 71, and the damping shaft 73 is also a stepped shaft with a thick middle part and thin sides. The spring 72 is arranged between the damping shaft 73 and the stepped groove surface, and a round hole 45 that penetrates the adjustment block 40 is formed at the end of the Y-shaped guide groove 21. The damping shaft 73 of the spring 72 buffer 70 naturally When in the on state, one end of the damping shaft 73 passes through the circular hole 45 to the Y-shaped guide groove 21, and a rubber head is fixed to the end of this side. A micro switch 80 is arranged at intervals on the other end of the damping shaft 73. When the sliding column 52 moves to the end of the Y-shaped guide groove 21, it presses the damping shaft 73 on the corresponding side outward to achieve a buffering effect. At the same time, the outer end of the damping shaft 73 touches the micro switch 80 to operate. The micro switch 80 serves as a switching signal of the lamp body 10 on the corresponding side, and is used as an input signal that the lamp body 10 is moved into place, that is, is at the "operating point", prompting the controller to connect this lamp body 10.

[0060] Reference Figure 14-15 The above is a comprehensive description of the working logic of the appearance defect light source module. The lamp bodies 10 used in this embodiment are respectively a white lamp body 10 located in the middle, a blue lamp body 10 located on one side of the second slot body 212, and a yellow lamp body 10 on one side of the third slot body 213; when the system needs to mobilize the blue lamp body 10 to perform a depth inspection on the appearance defects of the metal frame or metal coating of the mobile phone panel, it is necessary to control the direct-acting electromagnet 65 to move the first rack 62 backward, so that the limit block 42 on one side of the second slot body 212 is retracted into the accommodating groove 41, and synchronously, the limit block 42 on the other side moves the third slot body 213. The slot 213 is blocked so that the first slot 211 and the second slot 212 form a continuously curved channel. Synchronously, the linear slide drives the slide 52 to move outward. When it moves from the first slot 211 to the second slot 212, the support 20 drives the lamp body 10 to rotate along the shaft seat 31. When the slide 52 moves to the bottom of the second slot 212, the blue lamp body 10 reaches the "operating point". At the same time, the spring 72 buffer 70 triggers the micro switch 80, and the controller lights up the blue lamp body 10. At this time, the CCD industrial camera 90 can capture images of the object to be detected 100 at the bottom, that is, the mobile phone panel. When it is necessary to switch to the white lamp body 10, the linear slide only needs to drive the slide 52 to move in the opposite direction and return to the bottom of the first slot 211.

[0061] By designing a conversion component for switching multiple lamp bodies 10 to "operating points", by installing lamp body 10 light sources of different colors on its support 20, according to the material of the mobile phone panel or the requirements of the detection target, the corresponding light source is switched to the top of the mobile phone panel through the conversion component for lighting, which is convenient for the CCD camera to capture higher contrast images to improve the accuracy and reliability of detection. At the same time, the rapid switching of multiple light sources in a single workstation also greatly improves the detection efficiency of the mobile phone panel.

[0062] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light source module for detecting appearance defects of mobile phone panels, characterized in that: include: The lamp body comprises a lamp housing and a lamp panel, wherein the lamp panels are arranged in multiple layers from bottom to top inside the lamp housing, each layer of the lamp panels forms a trapezoidal light-emitting surface, and the angle between the lamp panels of each layer and the horizontal plane decreases from large to small from bottom to top; The conversion assembly comprises a rotatable support member, on the outer periphery of which a plurality of the lamp bodies are fixedly arranged and distributed at intervals, wherein the light source colors of the lamp panels of the lamp bodies are different, and when the support member rotates, the plurality of the lamp bodies can be switched to be placed directly above the mobile phone panel; The conversion assembly also includes a first support, an axle seat, an arc-shaped slide rail and a slider, wherein the axle seat is fixedly arranged on the top of the first support, the slider can be slidably arranged on the arc-shaped slide rail, one end of the support member is rotatably connected to the axle seat, and the other end is connected to the bottom surface of the slider, the axis center of the axle seat is the center of the arc-shaped slide rail, and when the slider moves on the arc-shaped slide rail, it drives the support member to rotate along the axle seat; The support member is provided with a Y-shaped guide groove on one side close to the shaft seat, and also includes a sliding column. The Y-shaped guide groove includes a first groove body and a second groove body and a third groove body that are connected and symmetrically forked on both sides. The sliding column moves linearly along the first groove body. When the sliding column moves into the second groove body or the third groove body, it can drive the support member to rotate.

2. A light source module for detecting appearance defects of mobile phone panels according to claim 1, characterized in that: The lamp board is provided with three layers inside the lamp housing, wherein, from bottom to top, the angle between the lamp board of the first layer and the horizontal plane is 75° to 85°, the angle between the lamp board of the second layer and the horizontal plane is 40° to 50°, and the angle between the lamp board of the third layer and the horizontal plane is 25° to 35°.

3. The light source module for detecting appearance defects of mobile phone panels according to claim 1, characterized in that: The support member is a fan-shaped annular plate, and the support member is coaxially distributed with the arc-shaped slide rail. A plurality of connection frames corresponding to the lamp body are arranged on the outside of the support member. One side of the connection frame is fixed to the bottom surface of the support member, and the other side main body extends out of the support member. The connection frame and the top surface of the lamp housing are commonly provided with a first connection hole.

4. The light source module for detecting appearance defects of mobile phone panels according to claim 1, characterized in that: It also includes an adjustment block, which is fixed on the upper side of the Y-shaped guide groove and has a consistent Y-shaped guide groove. The middle part of the side of the adjustment block is symmetrically provided with a receiving groove that communicates with the Y-shaped guide groove. Limiting blocks are rotatably connected in the two receiving grooves, and the limiting blocks are horizontally symmetrically distributed. Among them, by rotating the limit block on one side into the Y-shaped guide groove, the second groove body or the third groove body on the corresponding side can be blocked, so that the opposite side remains open and communicates with the first groove body.

5. The light source module for detecting appearance defects of mobile phone panels according to claim 4, characterized in that: The relative inner side surface of the limit block is a continuous fitting surface, and the top surface of the limit block is an inclined limit surface. When the limit block blocks the second groove body on the corresponding side, the limit surface fits the inner side surface of the second groove body. One side of the fitting surface of the limit block is flush with the inner side surface of the first groove body, and then transitions to be flush with the inner side surface of the third groove body, so that the first groove body and the third groove body form a continuous bending channel.

6. A light source module for detecting appearance defects of mobile phone panels according to claim 4 or 5, characterized in that: One end of the limit block is rotatably arranged in the receiving groove in cooperation with the torsion spring. When the torsion spring is in a natural state, the limit block is received in the receiving groove. An oblong groove penetrating the top surface of the limit block is provided at the receiving groove. An extrusion block is provided in the gap of the oblong groove. The extrusion block moves along the oblong groove to realize the telescopic conversion of the limit block in the Y-shaped guide groove. The upper sides of the two extrusion blocks are commonly connected with a staggered moving structure, and the staggered moving structure can realize the opposite movement of the two extrusion blocks. Wherein, the contact surface between the extrusion block, the limiting block and the oblong groove is a plane.

7. The light source module for detecting appearance defects of mobile phone panels according to claim 6, characterized in that: The dislocation moving structure includes a support frame, a first rack and a second rack. The support frame is fixedly mounted on the upper side of the adjustment block. The support frame is provided with a strip groove for the extrusion block to extend out. A circular gear is rotatably arranged in the middle of the support frame. The first rack and the second rack are respectively fixed on the two extrusion blocks. The inner sides of the first rack and the second rack are meshed with the circular gear, wherein the outer side of the first rack is linked with a direct-acting electromagnet.

8. The light source module for detecting appearance defects of mobile phone panels according to claim 4, characterized in that: A circular hole penetrating the adjusting block is formed at the end of the Y-shaped guide groove, and a spring buffer is fixed at the corresponding position of the adjusting block. When the damping shaft of the spring buffer is in a natural state, one end of the damping shaft passes through the circular hole into the Y-shaped guide groove, and a micro switch is arranged at an interval at the other end of the damping shaft. When the sliding column moves to the end of the Y-shaped guide groove and presses the damping shaft on the corresponding side outward, the outer end of the damping shaft touches the micro switch to operate.

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