A bottom light source supplemented hand knob high-precision appearance inspection line device

Abstract

The utility model relates to hand button appearance inspection technical field, concretely relates to a hand button high accuracy appearance inspection line body device of bottom light source supplementing. Including detection station, the center position fixed mounting of detection station upper side wall annular guide rail, the top of annular guide rail sliding installation has several equidistance distribution's fixed plate, the top fixed mounting of fixed plate has the bearing station. The utility model, through setting the square light source located in the industrial camera right below, when the bearing station moves to the detection station, the light of square light source penetrates the through -hole directly and irradiates the car button shell bottom, carries out the full light supplement to the inside light guide plate, has strengthened the light and dark contrast of light guide area and shell surface, makes the industrial camera can clearly capture the demarcation between light guide plate and car button shell, thereby realizes the high accuracy measurement of the position relation between laser engraving pattern and light guide plate trepanning, promotes the detection resolution and accuracy.

Description

Technical Field

[0001] This utility model relates to the field of button appearance inspection technology, specifically to a high-precision button appearance inspection line device with bottom light source supplementation. Background Technology

[0002] In the manufacturing process of automotive push-button switches (knobs), a typical process involves applying a black coating to the surface of a square button to cover both the primer and the internal light guide plate. Then, a pattern is formed on the surface of the housing by laser engraving, and the coating is partially removed to reveal the light guide plate material with a certain degree of transparency underneath. Traditional visual inspection methods usually involve using an industrial camera located above the product in conjunction with a ring light source for image capture and identification.

[0003] However, since the light guide plate and the surrounding coating are dark under natural light or top-down light, their colors and reflective properties are very similar, resulting in weak contrast and blurred boundaries in the image. Relying solely on top light source supplementation makes it difficult to highlight the visual difference between the light guide plate area and the surrounding black paint surface, thus making it impossible for conventional image processing algorithms to accurately identify the true outline and precise position of the light guide plate.

[0004] This limitation makes it impossible to reliably measure the relative positional relationship between the laser-engraved pattern and the light guide plate opening, making it difficult to detect defects such as positional shifts that occur during laser processing, which seriously affects the effectiveness and accuracy of product quality control. Summary of the Invention

[0005] The purpose of this invention is to provide a high-precision appearance inspection line device with a bottom-lit light source to solve the problems mentioned in the background art.

[0006] Relying solely on top light sources for illumination makes it difficult to highlight the visual difference between the light guide plate area and the surrounding black paint surface, thus preventing conventional image processing algorithms from accurately identifying the true outline and precise position of the light guide plate.

[0007] To address the above problems, this utility model aims to provide a high-precision appearance inspection line device with bottom-lit supplementation, comprising a testing platform. A circular guide rail is fixedly installed at the center of the side wall of the testing platform. Several equidistantly distributed fixed plates are slidably installed on the top of the circular guide rail. A support platform is fixedly installed on the top of each fixed plate. Both the support platform and the fixed plates have interconnected through holes. A drive mechanism is provided on the testing platform to drive all the fixed plates to move synchronously along the circular guide rail. An industrial camera is fixedly installed on the testing platform via a bracket. A square light source is fixedly installed on the upper side wall of the testing platform, located directly below the industrial camera. When the drive mechanism moves the fixed plates, all the support platforms pass sequentially between the square light source and the industrial camera. A positioning mechanism is provided on the testing platform. When one of the support platforms moves to the position between the square light source and the industrial camera, the positioning mechanism locks the position of that support platform, and at this time, the square light source is located directly below the through hole of that support platform.

[0008] As a further improvement to this technical solution, the driving mechanism includes a driving gear and a driven gear rotatably mounted on the side wall of the detection table. The driving gear and the driven gear are connected by the same chain, which is located inside the annular guide rail.

[0009] As a further improvement to this technical solution, a connecting plate is fixedly installed at one end of the fixed plate near the center of the testing platform, and the connecting plate is fixedly installed on the top of one of the chain links.

[0010] As a further improvement to this technical solution, the positioning mechanism includes a rotating shaft rotatably mounted on the upper side of the testing platform, with rotating plates fixedly mounted on both ends of the rotating shaft, and a positioning bearing fixedly mounted on the end of the rotating plate away from the axis of the rotating shaft.

[0011] As a further improvement to this technical solution, a cylinder is fixedly installed on the upper side wall of the testing platform, and a connecting rod is hinged to the end of the piston rod of the cylinder. The upper end of the connecting rod is fixedly connected to the middle position of the rotating shaft.

[0012] As a further improvement to this technical solution, a locking sleeve is fixedly installed on the lower side wall of the fixing plate. A semi-circular groove is provided on the side of the locking sleeve away from the center of the testing table. The inner diameter of the semi-circular groove is adapted to the outer diameter of the positioning bearing.

[0013] As a further improvement to this technical solution, when one of the support platforms moves to the position between the square light source and the industrial camera, the positions of the two positioning bearings correspond to the semicircular grooves on the two locking sleeves respectively. At this time, the rotating shaft drives the two positioning bearings to rotate synchronously, so that the positioning bearings rotate into the corresponding semicircular grooves.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. This high-precision appearance inspection line device for buttons with a bottom light source uses a square light source located directly below the industrial camera. When the platform moves to the inspection station, the light from the square light source penetrates the through-hole and directly illuminates the bottom of the automotive button housing, providing sufficient illumination to the internal light guide plate. This enhances the contrast between the light guide area and the housing surface, allowing the industrial camera to clearly capture the boundary between the light guide plate and the automotive button housing. This enables high-precision measurement of the positional relationship between the laser-engraved pattern and the opening in the light guide plate, improving inspection resolution and accuracy.

[0016] 2. The high-precision appearance inspection line device for the button with the bottom light source is driven by a cylinder-driven linkage mechanism to rotate the shaft, so that the positioning bearings at both ends are synchronously embedded in the semi-circular grooves of the corresponding locking sleeves. This action forms a mechanical lock on the carrier platform during inspection, suppressing its horizontal movement and vibration, and ensuring the positional stability of the automotive button housing during image acquisition by the industrial camera, thereby improving image consistency and the reliability and accuracy of the inspection results. Attached Figure Description

[0017] Figure 1 This is one of the overall structural schematic diagrams of this utility model;

[0018] Figure 2 This is one of the overall structural schematic diagrams of this utility model;

[0019] Figure 3 This is one of the partial structural schematic diagrams of this utility model;

[0020] Figure 4 This is a structural schematic diagram of the positioning mechanism, fixing plate, and support platform of this utility model;

[0021] Figure 5 This is the second partial structural schematic diagram of the present utility model;

[0022] Figure 6 This is the third partial structural schematic diagram of this utility model.

[0023] The meanings of the labels in the diagram are as follows:

[0024] 1. Testing table; 2. Circular guide rail;

[0025] 3. Fixing plate; 31. Support platform; 32. Through hole; 33. Locking sleeve;

[0026] 4. Square light source; 5. Industrial camera; 6. Ring light source;

[0027] 7. Positioning mechanism; 71. Rotating shaft; 72. Connecting rod; 73. Cylinder; 74. Rotating plate; 75. Positioning bearing;

[0028] 8. Drive mechanism; 81. Driving gear; 82. Driven gear; 83. Chain; 84. Connecting plate;

[0029] 9. Laser head. Detailed Implementation

[0030] 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. Example

[0031] Please see Figure 1 and Figure 2 As shown, the purpose of this embodiment is to provide a high-precision appearance inspection line device for buttons with bottom light source supplementation, including a detection table 1. An annular guide rail 2 is fixedly installed at the center of the upper side wall of the detection table 1. Several equally spaced fixed plates 3 are slidably installed on the top of the annular guide rail 2. A support platform 31 is fixedly installed on the top of the fixed plates 3. The upper side wall of the support platform 31 is provided with a positioning groove for accommodating the automotive button housing. Both the support platform 31 and the fixed plates 3 are provided with interconnected through holes 32. The detection table 1 is provided with a drive mechanism 8 for driving all the fixed plates 3 to move synchronously along the annular guide rail 2.

[0032] The structure of the drive mechanism 8 is described in detail below, with reference to... Figure 3 The drive mechanism 8 includes a drive gear 81 and a driven gear 82 rotatably mounted on the upper side wall of the test table 1. A drive motor is fixedly mounted on the test table 1. The output shaft of the drive motor is coaxially and fixedly connected to the drive gear 81. The drive gear 81 and the driven gear 82 are connected by the same chain 83. The chain 83 is located inside the annular guide rail 2 and is arranged at equal intervals with the annular guide rail 2. A connecting plate 84 is fixedly mounted on one end of the fixed plate 3 near the center of the test table 1. The connecting plate 84 is fixedly mounted on the top of one of the links of the chain 83.

[0033] The drive motor is electrically connected to an external control device, which controls its start and stop. When the drive motor drives the drive gear 81 to rotate, the drive gear 81 drives the chain 83 to rotate. The chain 83 drives the fixed plate 3 to move along the annular guide rail 2 through the connecting plate 84. Since the chain 83 and the annular guide rail 2 always maintain an equal distance, the connecting plate 84 will not exert additional tension on the chain 83, thus ensuring the smoothness and synchronization of the transmission. By controlling the intermittent operation of the drive motor, the one-step-one-stop rhythmic movement of all fixed plates 3 and the bearing platform 31 can be realized, meeting the requirements of high-precision detection.

[0034] Reference Figure 5 and Figure 6 An industrial camera 5 is fixedly mounted on the inspection table 1 by a bracket. The industrial camera 5 is electrically connected to an external image processing device. A ring light source 6 is installed at the bottom of the industrial camera 5. The ring light source 6 is arranged around the lens and is used for supplementary lighting during shooting. A square light source 4 is fixedly mounted on the upper side wall of the inspection table 1. The square light source 4 is located directly below the industrial camera 5. Both the square light source 4 and the ring light source 6 use commercially available LED lights.

[0035] When the drive mechanism 8 moves the fixed plate 3, all the carrier platforms 31 pass between the square light source 4 and the industrial camera 5 in sequence. The square light source 4 and the industrial camera 5 are set up as a detection station. The detection station is arranged upstream of the fixed plate 3 along the moving direction of the laser engraving station, the pressing station and the feeding station are arranged in sequence, and the spacing between each station is equal.

[0036] When one of the carrier platforms 31 moves to the detection station (i.e., the position between the square light source 4 and the industrial camera 5), ​​the external image processing device captures its image through the industrial camera 5 and sends a signal to the control device to stop the drive motor, so that the carrier platform 31 stops at the station. The control device adjusts the operation of the drive motor according to the image information. This prior art will not be described in detail here.

[0037] When a support platform 31 stops at the inspection station, since the spacing between each station is consistent, the laser engraving station, the pressing station, and the loading station also have corresponding support platforms 31 stopping.

[0038] In actual operation, the external robotic arm first places the car button housing on the support platform 31 of the loading station. As the fixing plate 3 moves, the housing is transported to the pressing station, where the equipment presses the housing down to embed it into the positioning groove of the support platform 31 to restrict horizontal movement. Then the housing enters the laser engraving station, where the laser head 9 is fixedly installed on the inspection table 1 by the lifting frame and emits a laser to the car button housing to engrave a predetermined pattern on the upper side wall of the car button housing.

[0039] After the engraving is completed, the carrier platform 31 carries the car button housing into the inspection station. At this time, the square light source 4 is located directly below the through hole 32. Its light penetrates the through hole 32 and shines upward to the bottom of the car button housing, providing supplementary lighting to the light guide plate inside the housing. After supplementary lighting, the difference in brightness between the light guide plate and the housing surface is significant. The industrial camera 5 can clearly capture the boundary between the two, thereby accurately measuring the positional distance between the laser pattern and the opening of the light guide plate, and thus determining whether the workpiece is qualified.

[0040] It should be noted that using an industrial camera 5 to identify the boundary between the light guide plate and the housing surface, and to measure the distance between the laser pattern and the opening position of the light guide plate, is existing technology and will not be discussed further in this article.

[0041] To enhance the stability of the carrier platform 31 during testing, a positioning mechanism 7 is provided on the testing platform 1. When one of the carrier platforms 31 moves to the position between the square light source 4 and the industrial camera 5, the positioning mechanism 7 locks the position of the carrier platform 31, thereby improving the stability and testing accuracy of the automotive button housing during the testing process.

[0042] The structure of positioning mechanism 7 is described in detail below, with reference to... Figure 4 The positioning mechanism 7 includes a rotating shaft 71 rotatably mounted on the upper side of the testing table 1. Rotating plates 74 are fixedly mounted on both ends of the rotating shaft 71. A positioning bearing 75 is fixedly mounted on the end of the rotating plate 74 away from the axis of the rotating shaft 71. A cylinder 73 is fixedly mounted on the upper side wall of the testing table 1. The cylinder 73 is electrically connected to an external control device. A connecting rod 72 is hinged to the piston rod end of the cylinder 73. The upper end of the connecting rod 72 is fixedly connected to the middle position of the rotating shaft 71. A locking sleeve 33 is fixedly mounted on the lower side wall of the fixing plate 3. A semi-circular groove is opened on the side of the locking sleeve 33 away from the center of the testing table 1. The inner diameter of the semi-circular groove is adapted to the outer diameter of the positioning bearing 75.

[0043] When one of the support platforms 31 moves to the position between the square light source 4 and the industrial camera 5, the positions of the two positioning bearings 75 correspond to the semi-circular grooves on the two locking sleeves 33 respectively. At the same time as the control device stops the drive motor, the cylinder 73 is started. The piston rod of the cylinder 73 extends and drives the rotating shaft 71 to rotate through the connecting rod 72. The rotating shaft 71 drives the two positioning bearings 75 to rotate synchronously, so that the positioning bearings 75 rotate into the corresponding semi-circular grooves. At this time, the positioning bearings 75 and the semi-circular grooves cooperate to restrict the movement of the fixed plate 3 and the support platform 31, thereby improving the stability of the car button housing on the support platform 31 during the detection process.

[0044] After the inspection process is completed within the predetermined time, the control equipment first drives the piston rod of cylinder 73 to retract, causing the positioning bearing 75 to rotate out from the corresponding semi-circular groove, releasing the lock on the fixed plate 3. Then, the drive motor is started to move the next carrier platform 31 carrying the engraved shell to the inspection station. The above process is repeated to achieve continuous inspection.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision appearance inspection line device for a bottom-lit hand button, comprising an inspection table (1), characterized in that: A ring guide rail (2) is fixedly installed at the center of the upper side wall of the testing platform (1). Several equally spaced fixed plates (3) are slidably installed on the top of the ring guide rail (2). A support platform (31) is fixedly installed on the top of the fixed plates (3). Through holes (32) are opened on both the support platform (31) and the fixed plates (3). A drive mechanism (8) is provided on the testing platform (1) to drive all the fixed plates (3) to move synchronously along the ring guide rail (2). An industrial camera (5) is fixedly installed on the testing platform (1) by a bracket. The upper side wall of the testing platform (1) A square light source (4) is fixedly installed. The square light source (4) is located directly below the industrial camera (5). When the driving mechanism (8) moves the fixed plate (3), all the carrier platforms (31) pass between the square light source (4) and the industrial camera (5) in sequence. The detection platform (1) is provided with a positioning mechanism (7). When one of the carrier platforms (31) moves to the position between the square light source (4) and the industrial camera (5), the positioning mechanism (7) locks the position of the carrier platform (31), and at this time the square light source (4) is located directly below the through hole (32) of the carrier platform (31).

2. The high-precision appearance inspection line device with bottom light source supplementation according to claim 1, characterized in that: The drive mechanism (8) includes a drive gear (81) and a driven gear (82) rotatably mounted on the side wall of the test bench (1). The drive gear (81) and the driven gear (82) are connected by the same chain (83), which is located inside the annular guide rail (2).

3. The high-precision appearance inspection line device with bottom light source supplementation according to claim 2, characterized in that: A connecting plate (84) is fixedly installed at one end of the fixed plate (3) near the center of the testing table (1), and the connecting plate (84) is fixedly installed on the top of one of the links of the chain (83).

4. The high-precision appearance inspection line device with bottom light source supplementation according to claim 1, characterized in that: The positioning mechanism (7) includes a rotating shaft (71) rotatably mounted on the upper side of the testing table (1). Rotating plates (74) are fixedly mounted on both ends of the rotating shaft (71). A positioning bearing (75) is fixedly mounted on one end of the rotating plate (74) away from the axis of the rotating shaft (71).

5. The high-precision appearance inspection line device with bottom light source supplementation according to claim 4, characterized in that: A cylinder (73) is fixedly installed on the upper side wall of the testing platform (1). A connecting rod (72) is hinged to the piston rod end of the cylinder (73). The upper end of the connecting rod (72) is fixedly connected to the middle position of the rotating shaft (71).

6. The high-precision appearance inspection line device with bottom light source supplementation according to claim 4, characterized in that: A locking sleeve (33) is fixedly installed on the lower side wall of the fixing plate (3). A semi-circular groove is provided on the side of the locking sleeve (33) away from the center of the testing table (1). The inner diameter of the semi-circular groove is adapted to the outer diameter of the positioning bearing (75).

7. The high-precision appearance inspection line device with bottom light source supplementation according to claim 6, characterized in that: When one of the support platforms (31) moves to the position between the square light source (4) and the industrial camera (5), the positions of the two positioning bearings (75) correspond to the semi-circular grooves on the two locking sleeves (33) respectively. At this time, the rotating shaft (71) drives the two positioning bearings (75) to rotate synchronously, so that the positioning bearings (75) rotate into the corresponding semi-circular grooves.

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