Adsorption type backlight stage and appearance detection device

Abstract

This utility model discloses an adsorption-type backlit stage and appearance inspection equipment in the field of testing equipment technology. The adsorption-type backlit stage includes: a support part made of light-transmitting material, the support part providing an adsorption plane with several sets of adsorption holes, and the adsorption holes being connected to a negative pressure air source; and a backlight part fixedly disposed on the side of the support part opposite to the adsorption plane, and the light-emitting area of ​​the backlight part covering all the adsorption holes. This utility model's adsorption-type backlit stage has a support part that supports the product to be inspected and, in conjunction with the built-in backlight part, provides uniform and stable vertical illumination to the product. This not only improves the clarity and image quality of the product image but also enhances the accuracy and reliability of appearance defect detection. Furthermore, since the backlight part is fixed to the support part, the light source always follows the product to be inspected, effectively eliminating problems such as shadow mismatch caused by the relative displacement between the light source and the product.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment, specifically to an adsorption-type backlight stage and appearance inspection equipment. Background Technology

[0002] During the production process of products (such as PCB boards and FPC flexible boards), defects are usually generated. Therefore, testing equipment is generally used to detect defects in products.

[0003] The conveying assembly and appearance inspection equipment disclosed in patent CN221056475U include: a mounting plate 10, a movable plate 20, and a supplementary lighting module 30. The movable plate 20 is movably disposed on the mounting plate 10 and is adapted to move relative to the mounting plate 10 along the conveying direction. The movable plate 20 defines a placement plane A. The workpiece to be inspected is disposed on the movable plate 20. The supplementary lighting module 30 is disposed on the mounting plate 10 and located between the movable plate 20 and the mounting plate 10, and is adapted to provide supplementary lighting to the placement plane A. A mounting bracket 32 ​​is used to fix the supplementary lighting module 30 on the mounting plate 10. While the aforementioned patent can improve the image clarity and image quality of the test piece, it still has the following drawbacks: its supplementary lighting module is fixed on the mounting plate. When the moving plate moves the test piece along the conveying direction, the relative displacement between the supplementary lighting module and the moving plate causes the spatial relationship between the light source and the product surface to change continuously during the dynamic detection process. This makes it impossible for the incident angle of the light to match the geometric features of the test area in real time, which can easily lead to problems such as shadow interference caused by illumination mismatch during image acquisition. This exacerbates the irregular distribution of shadows, which not only affects the detection accuracy but also easily leads to misjudgment of defects. Secondly, if the product to be inspected is a relatively soft product (such as an FPC flexible board), when the soft product is placed on the moving plate, the relative displacement between the soft product and the moving plate is easily caused when the moving plate moves. It is also easy for the soft product to warp around or in other parts, which will lead to image blurring during image acquisition and further affect the inspection accuracy. Therefore, we propose an adsorption-type backlight stage and appearance inspection equipment. Utility Model Content

[0004] The purpose of this invention is to provide an adsorption-type backlight stage and appearance inspection equipment, which solves the problem that the relative displacement between the existing supplementary lighting module and the moving plate causes the spatial relationship between the light source and the product surface to change continuously during the dynamic inspection process, making it impossible to match the incident angle of the light with the geometric features of the area to be inspected in real time, thus easily causing shadow interference caused by illumination mismatch during image acquisition.

[0005] This utility model achieves the above objectives through the following technical solutions: The adsorption-type backlight stage includes: The support part is made of a light-transmitting material and provides an adsorption plane with several sets of adsorption holes, and the adsorption holes are connected to a negative pressure air source. The backlight section is fixedly disposed on the side of the support section opposite to the adsorption plane, and the light-emitting area of ​​the backlight section covers all the adsorption holes.

[0006] A further improvement is that the adsorption-type backlight stage also includes a mounting part located on one side of the backlight section for connecting the conveying assembly, the mounting part being driven to move by the conveying assembly.

[0007] A further improvement is that the support part further includes a support plate fixedly connected to the backlight part, a contact plate disposed on the side of the support plate away from the backlight part, a groove 1 opened on the side of the support plate facing the contact plate, the adsorption hole opened on the contact plate and communicating with the groove 1, and the groove 1 being connected to a negative pressure air source through a negative pressure connecting pipe.

[0008] A further improvement is that the groove includes a rectangular groove with an area covering all the adsorption holes, and an extension groove communicating with the rectangular groove and the negative pressure connecting pipe, wherein the area of ​​the extension groove is smaller than the area of ​​the rectangular groove.

[0009] A further improvement is that the backlight section includes a backlight panel; The backlight unit also includes a mounting plate that connects to the support unit, a second groove formed on the side of the mounting plate facing the adsorption plane for accommodating the backlight plate, and a heat dissipation hole formed on the side wall of the mounting plate and communicating with the second groove. The second groove and the rectangular groove are adapted to each other in area and correspond to each other.

[0010] A further improvement is that the backlight section also includes a diffuser plate corresponding to the backlight plate and disposed at the opening of the second groove, and a support protrusion disposed on the inner wall of the second groove for supporting the diffuser plate.

[0011] A further improvement is that the mounting part includes a base plate spaced apart on the side of the mounting plate away from the adsorption plane, a number of sets of support plates connecting the base plate and the mounting plate, and L-shaped plates on both sides of the base plate for connection with the conveying assembly.

[0012] A further improvement is that a waist-shaped hole is provided on the outer wall of the L-shaped plate connected to the base plate, and a threaded hole is provided on the base plate at the position corresponding to the waist-shaped hole. The L-shaped plate is adjustablely connected to the base plate by bolts passing through the waist-shaped hole and the threaded hole.

[0013] An appearance inspection device includes a frame, a loading assembly, a loading and conveying assembly, an image acquisition assembly 1, an unloading and conveying assembly, an image acquisition assembly 2, an unloading assembly, a conveying assembly, and an adsorption-type backlight stage as described above. The feeding component is used to feed the product to the feeding and conveying component; The loading and conveying assembly is used to transfer the product on the loading assembly to the adsorption-type backlight platform, which is driven to move by the conveying assembly. The image acquisition component is used to acquire images of the upper surface of the product on the adsorption-type backlight stage when the conveying component drives the adsorption-type backlight stage to move. The unloading and conveying assembly is used to transfer the product on the adsorption-type backlight carrier to the unloading assembly. The image acquisition component 2 is used to acquire images of the lower surface of the product during the process of the unloading and handling component transferring the product to the unloading component. The feeding assembly delivers the inspected product.

[0014] The beneficial effects of this utility model are as follows: This utility model's adsorption-type backlight stage can be mounted on a conveying assembly and applied in appearance inspection equipment. The adsorption-type backlight stage has a support unit that supports the product to be inspected and, in conjunction with a built-in backlight unit, provides uniform and stable vertical illumination to the product. This not only improves the clarity and quality of the product's image but also enhances the accuracy and reliability of appearance defect detection. Simultaneously, the backlight unit is fixed to the support unit, ensuring the light source always follows the product to provide light, effectively eliminating problems such as shadow mismatch caused by the relative displacement between the light source and the product. Furthermore, the adsorption holes in the support unit, through negative pressure adsorption, not only achieve stable fixation of the product during inspection but also effectively flatten warping deformation of softer products such as FPC flexible boards, preventing image blurring and reducing inspection errors. At the same time, the light-emitting area of ​​the backlight unit covers all adsorption holes, effectively eliminating or blurring the shadow interference from structures such as adsorption holes in the image, improving the imaging effect, and further enhancing inspection accuracy. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the adsorption-type backlight stage structure of this utility model. Figure 2 This utility model Figure 1 Another perspective structural diagram; Figure 3 This is a schematic diagram of the supporting structure of this utility model; Figure 4 This is a schematic diagram of the backlight section structure of this utility model; Figure 5 This utility model Figure 4 A schematic diagram of a local structure in the image; Figure 6 This is a schematic diagram of the adsorption-type backlight stage and conveying assembly of this utility model. Figure 7 This is a schematic diagram of the appearance inspection equipment of this utility model; Figure 8 This utility model Figure 7 A schematic diagram of a local structure.

[0016] In the diagram: 100, Supporting part; 101, Contact plate; 102, Supporting plate; 103, Adsorption hole; 104, Groove 1; 104a, Rectangular groove; 104b, Extension groove; 105, Negative pressure connecting pipe; 200, Backlighting part; 201, Mounting plate; 202, Groove 2; 203, Backlighting plate; 204, Heat dissipation hole; 205, Supporting protrusion; 206, Diffuser plate; 300, Mounting part; 301, Base plate; 302, Supporting plate; 303, L-shaped plate; 400, Frame; 500, Feeding assembly; 600, Feeding and handling assembly; 700, Image acquisition assembly 1; 800, Unloading and handling assembly; 900, Image acquisition assembly 2; 1000, Unloading assembly; 1100, Conveying assembly; a, Unloading and handling assembly handling end. Detailed Implementation

[0017] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0018] Example 1 Please see the appendix Figure 7-8 This adsorption-type backlight stage is suitable for appearance inspection equipment. Appearance inspection equipment is used to perform defect detection on products to be inspected (such as PCB boards, FPC flexible boards, etc.). It is widely used in this field and will not be described in detail here. Please see the appendix Figure 1-5 The adsorption-type backlight stage includes: The carrier part 100 is made of a light-transmitting material (preferably an acrylic sheet). The carrier part 100 provides an adsorption plane with several sets of adsorption holes 103 (the hole diameter is, for example, φ1.0-2.0mm). The product to be tested (such as PCB board, FPC flexible board, etc.) is placed on the adsorption plane, and the adsorption holes 103 are connected to a negative pressure air source (such as a vacuum pump, negative pressure fan, etc.). The above setup ensures the light transmittance of the product placement plane and also enables stable fixation of the product during the testing process through negative pressure adsorption, ensuring testing accuracy and operational reliability. Furthermore, if the product to be tested is an FPC flexible board, after the FPC flexible board is placed on the adsorption plane, the external negative pressure source removes the air between the product and the adsorption plane through the adsorption hole 103, causing the FPC flexible board to adhere to the upper surface of the adsorption plane and flatten it, preventing warping of the edges or other parts of such soft products as FPC flexible boards, which would affect the imaging quality. Because the adsorption plane has adsorption holes 103, shadows are easily generated at the adsorption holes 103 during the detection process, which leads to a decrease in imaging effect. To address this, a backlight 200 is also provided. The backlight 200 is fixedly mounted on the side of the support 100 opposite to the adsorption plane. When acquiring images, the backlight 200 provides a light source, and the image acquisition component in the appearance inspection equipment acquires images. The light-emitting area of ​​the backlight 200 covers all adsorption holes 103, and the light emitted by the backlight 200 vertically illuminates the product on the adsorption plane, providing uniform illumination for the product. This not only makes the product image clearer and the imaging effect better, improving the accuracy and reliability of appearance defect detection, but also effectively eliminates or blurs the shadow interference of structures such as adsorption holes 103 in the imaging, improving the imaging effect and detection accuracy. Furthermore, as shown in the appendix Figure 1-2 As shown, the cross-sections of both the support portion 100 and the backlight portion 200 are preferably rectangular, but are not limited to this shape. Furthermore, since the backlight 200 is fixed on the support 100, the light source of this stage always follows the product to be inspected, providing it with light. This effectively eliminates problems such as light angle shift and shadow mismatch caused by the relative displacement between the traditional light source and the moving structure. At the same time, the light-emitting area of ​​the backlight 200 covers all the adsorption holes 103. Compared with the traditional design method of separating the light source and the moving structure, this stage shows significant advantages in terms of eliminating shadow interference from structures such as the adsorption holes 103 in imaging, light uniformity, and the ability to detect micro-defects.

[0019] Please see the appendix Figure 6 Preferably, the adsorption-type backlight stage of this embodiment also includes a mounting part 300 located on the side of the backlight part 200 away from the support part 100 for connecting the conveying assembly 1100. The mounting part 300 is driven to move by the conveying assembly 1100. The aforementioned conveying assembly 1100, such as a chain conveyor or a conveyor belt, can move the adsorption-type backlight stage under the drive of the conveying assembly 1100. Therefore, when this adsorption-type backlight stage is applied in an appearance inspection device, during the process of the adsorption-type backlight stage being moved by the conveying assembly 1100, the product image on the adsorption-type backlight stage can be acquired by the image acquisition component in the appearance inspection device. Compared with the traditional detection method that requires the synchronous movement of the image acquisition component and the light source, replacing the movement of the optical system by moving the stage not only simplifies the equipment structure and reduces the complexity of motion control, but also eliminates the vibration error and position accumulation deviation caused by synchronous movement, significantly improving the stability and repeatability of image acquisition. At the same time, the static arrangement of the image acquisition component obtains more consistent imaging quality. Combined with the stage with its own light source, it ensures the accuracy and reliability of product appearance defect detection.

[0020] Furthermore, the adsorption-type backlight stage of this embodiment can not only be installed on the conveying assembly 1100, but also connected to the unloading and handling assembly 800, as shown in the attached figure. Figure 7-8 As shown, the unloading and handling component 800 can adsorb the product to be tested and transport it to the required position through the adsorption-type backlight stage. Therefore, it can cooperate with the image acquisition component 900 to acquire images of the lower surface of the product to be tested, thereby improving the image acquisition quality of the image acquisition component 900.

[0021] Example 2 Please see the appendix Figure 1 and 3 Based on Embodiment 1, the support portion 100 of this embodiment further includes a support plate 102 fixedly connected to the backlight portion 200, a contact plate 101 disposed on the side of the support plate 102 away from the backlight portion 200 (the contact plate 101 and the support plate 102 can be detachably connected by a screw-type fixing structure), a groove 104 opened on the side of the support plate 102 facing the contact plate 101, an adsorption hole 103 opened on the contact plate 101 and communicating with the groove 104, the groove 104 being connected to a negative pressure air source through a negative pressure connecting pipe 105, the direct communication between the groove 104 and the negative pressure connecting pipe 105 optimizes the airflow path, making the negative pressure distribution of the adsorption hole 103 more uniform and stable.

[0022] Preferably, in this embodiment, the groove 104 includes a rectangular groove 104a covering all adsorption holes 103, and an extension groove 104b communicating with the rectangular groove 104a and the negative pressure connecting pipe 105. The extension groove 104b has an opening communicating with one end of the negative pressure connecting pipe 105. The negative pressure connecting pipe 105 is sealed to the opening (e.g., using a sealing ring) and is detachably connected (e.g., using a bolt or threaded connection). The area of ​​the extension groove 104b is smaller than the area of ​​the rectangular groove 104a. Figure 3 As shown, the cross-section of the groove 104 formed by the rectangular groove 104a and the extended groove 104b is similar to an L-shape. The large volume design of the rectangular groove 104a can quickly establish a uniform negative pressure field, ensuring that all adsorption holes 103 obtain stable adsorption force simultaneously. The narrow cross-section structure of the extended groove 104b can significantly increase the airflow velocity through the Venturi effect, thereby increasing the speed at which the adsorption holes 103 generate negative pressure.

[0023] Example 3 Please see the appendix Figure 4-5 Based on Embodiment 1, the backlight unit 200 of this embodiment includes a backlight plate 203. Specifically, the light-emitting area of ​​the backlight plate 203 covers all the adsorption holes 103. The backlight unit 200 also includes a mounting plate 201 connecting the support unit 100 (the mounting plate 201 can be detachably connected to the support plate 102 using a screw-type fixing structure), a second groove 202 opened on the side of the mounting plate 201 facing the adsorption plane for accommodating the backlight panel 203, and a heat dissipation hole 204 opened on the side wall of the mounting plate 201 and communicating with the second groove 202. The heat dissipation hole 204 is preferably elongated, but is not limited to this shape. The mounting plate 201 also has a through hole for one end of the negative pressure connecting pipe 105 to pass through, so that the negative pressure connecting pipe 105 can communicate with the extension groove 104b. The area of ​​the second groove 202 is adapted to the area of ​​the rectangular groove 104a and the two correspond to each other. The second groove 202 and the rectangular groove 104a form a light path channel, effectively constraining the light emitted by the backlight panel 203 so that it penetrates the support unit 100 vertically. Therefore, by placing the backlight panel 203 in the groove 202 of the mounting plate 201, the backlight panel 203 can be protected and its service life extended. The backlight panel 203 is connected to an external power supply and / or external control system equipment through wires and / or connectors, which will not be described in detail here. In addition, heat dissipation holes 204 are provided on the outer wall of the mounting plate 201 to dissipate heat from the backlight panel 203 during use, thereby improving the working stability and reliability of the backlight panel 203 and further extending its service life.

[0024] As a preferred embodiment, the backlight section 200 further includes a diffuser plate 206 corresponding to the backlight plate 203 and disposed at the groove opening of the second groove 202, and a support protrusion 205 disposed on the inner wall of the second groove 202 for supporting the diffuser plate 206. Therefore, the diffuser plate 206 not only seals the groove 202 and further protects the internal backlight plate 203, but also homogenizes the light emitted by the backlight plate 203, improving the uniformity of the light. The supporting protrusion 205 is rectangular, which keeps the diffuser plate 206 and the backlight plate 203 at the optimal working distance to obtain the best optical performance. In addition, the supporting protrusion 205 also makes one side of the diffuser plate 206 flush with one side of the mounting plate 201, ensuring the overall appearance of the equipment and facilitating the stable connection between the backlight part 200 and the support part 100.

[0025] Example 4 Please see the appendix Figure 1Based on Embodiment 1, the mounting part 300 of this embodiment includes a base plate 301 spaced apart on the side of the mounting plate 201 away from the adsorption plane, several sets of support plates 302 connecting the base plate 301 and the mounting plate 201, with four sets of support plates 302 distributed around one side of the base plate 301 to achieve rigid support and force balance between the mounting plate 201 and the base plate 301, so that the adsorption-type backlight stage remains stable during movement, and L-shaped plates 303 provided on both sides of the base plate 301 for connection with the conveying assembly 1100, such as... Figure 2 As shown, L-shaped plates 303 are specifically disposed on both side walls of the base plate 301 adjacent to the heat dissipation holes 204. The two L-shaped plates 303 can be symmetrically disposed on both side walls of the base plate 301 or staggered. In this embodiment, the preferred arrangement is to stagger the two L-shaped plates 303 on both side walls of the base plate 301, i.e., one L-shaped plate 303 connects to the middle of one side wall of the base plate 301, while the other L-shaped plate 303 is disposed at the end of the opposite side wall. This arrangement not only significantly improves the platform's resistance to torsional loads, but also... The transmission mechanism (such as chain or belt) of the conveying component 1100 is provided with more optimized clearance space, ensuring compatibility with conveying components 1100 of different specifications. Furthermore, it effectively breaks the symmetrical resonance frequency, effectively suppresses the lateral vibration generated during high-speed movement, and provides stability for the use of the platform. It is especially suitable for inspection scenarios that require high-frequency reciprocating motion, such as appearance inspection equipment. Furthermore, the L-shaped plate 303 can be connected to the conveying component 1100 by a bolt-type fixing structure, which will not be described in detail here.

[0026] Preferably, in this embodiment, the outer wall of the L-shaped plate 303 connected to the base plate 301 is provided with a waist-shaped hole, and the base plate 301 is provided with a threaded hole at the position corresponding to the waist-shaped hole. The L-shaped plate 303 is tunably connected to the base plate 301 by bolts passing through the waist-shaped hole and the threaded hole. The design of the waist-shaped hole not only facilitates better connection and fixation between the L-shaped plate 303 and the conveying assembly 1100, but also facilitates adjustment of the height of the platform according to the needs of use, so that the product placed on the adsorption plane is at a suitable distance from the image acquisition component in the appearance inspection equipment, thereby improving the imaging effect.

[0027] Please see the appendix Figure 6-8 An appearance inspection device includes a frame 400, a loading assembly 500, a loading and conveying assembly 600, an image acquisition assembly 700, an unloading and conveying assembly 800, an image acquisition assembly 900, an unloading assembly 1000, a conveying assembly 1100, and an adsorption-type backlight stage as described above. The loading assembly 500, the loading and conveying assembly 600, the image acquisition assembly 700, the unloading and conveying assembly 800, the image acquisition assembly 900, the unloading assembly 1000, and the conveying assembly 1100 are all conventional structures in the art and have been disclosed in the prior art, and will not be described in detail here. Among them, the feeding component 500 is used to feed the product to the feeding and handling component 600; The loading and handling assembly 600 is used to transfer the products on the loading assembly 500 to the adsorption-type backlight platform, which is driven to move by the conveying assembly 1100. Image acquisition component 700 is used to acquire images of the upper surface of the product on the adsorption backlight stage when the conveying component 1100 drives the adsorption backlight stage to move. The unloading and conveying assembly 800 is used to transfer the product on the adsorption-type backlight carrier to the unloading assembly 1000; Image acquisition component 2 900 is used to acquire images of the lower surface of the product during the process of the unloading and handling component 800 transferring the product to the unloading component 1000; The feeding assembly 1000 conveys the inspected products. Furthermore, in practice, the image acquisition component 700 in this appearance inspection equipment is preferably an angle-adjustable image acquisition component 700. When the image acquisition component 700 acquires product images on the adsorption-type backlight platform, the tilt angle of the image acquisition component 700 can be adjusted, and in conjunction with the backlight part 200 on the platform, defects such as burrs inside the holes on the surface of the product (such as perforated FPC flexible boards) can be effectively detected.

[0028] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. An adsorption-type backlight stage, characterized in that, include: The support part (100) is made of a light-transmitting material. The support part (100) provides an adsorption plane with a number of adsorption holes (103), and the adsorption holes (103) are connected to a negative pressure air source. The backlight part (200) is fixedly disposed on the side opposite to the adsorption plane on the support part (100), and the light-emitting area of ​​the backlight part (200) covers all the adsorption holes (103).

2. The adsorption-type backlight stage according to claim 1, characterized in that, The adsorption-type backlight stage also includes a mounting part (300) located on one side of the backlight part (200) for connecting the conveying assembly (1100), the mounting part (300) being driven to move by the conveying assembly (1100).

3. The adsorption-type backlight stage according to claim 1, characterized in that, The support part (100) further includes a support plate (102) fixedly connected to the backlight part (200), a contact plate (101) disposed on the side of the support plate (102) away from the backlight part (200), a groove (104) opened on the side of the support plate (102) facing the contact plate (101), an adsorption hole (103) opened on the contact plate (101) and communicating with the groove (104), and the groove (104) is connected to a negative pressure air source through a negative pressure connecting pipe (105).

4. The adsorption-type backlight stage according to claim 3, characterized in that, The groove (104) includes a rectangular groove (104a) covering all the adsorption holes (103) and an extension groove (104b) communicating with the rectangular groove (104a) and the negative pressure connecting pipe (105), wherein the area of ​​the extension groove (104b) is smaller than the area of ​​the rectangular groove (104a).

5. The adsorption-type backlight stage according to claim 4, characterized in that, The backlight unit (200) includes a backlight panel (203); The backlight unit (200) also includes a mounting plate (201) that connects to the support unit (100), a second groove (202) opened on the side of the mounting plate (201) facing the adsorption plane for accommodating the backlight panel (203), and a heat dissipation hole (204) opened on the side wall of the mounting plate (201) and communicating with the second groove (202). The second groove (202) is adapted to the area of ​​the rectangular groove (104a) and the two correspond to each other.

6. The adsorption-type backlight stage according to claim 5, characterized in that, The backlight section (200) further includes a diffuser plate (206) corresponding to the backlight plate (203) and disposed at the opening of the groove (202), and a support protrusion (205) disposed on the inner wall of the groove (202) for supporting the diffuser plate (206).

7. The adsorption-type backlight stage according to claim 2, characterized in that, The mounting part (300) includes a base plate (301) spaced apart on the side of the mounting plate (201) away from the adsorption plane, a plurality of support plates (302) connecting the base plate (301) and the mounting plate (201), and L-shaped plates (303) on both sides of the base plate (301) for connecting with the conveying assembly (1100).

8. The adsorption-type backlight stage according to claim 7, characterized in that, The L-shaped plate (303) has a waist-shaped hole on its outer wall connecting to the base plate (301), and the base plate (301) has a threaded hole at the position corresponding to the waist-shaped hole. The L-shaped plate (303) is tunably connected to the base plate (301) by bolts passing through the waist-shaped hole and the threaded hole.

9. An appearance inspection device, characterized in that: The device includes a frame (400), a loading assembly (500) disposed on the frame (400), a loading and conveying assembly (600), an image acquisition assembly one (700), an unloading and conveying assembly (800), an image acquisition assembly two (900), an unloading assembly (1000), a conveying assembly (1100), and an adsorption-type backlight stage as described in any one of claims 1-8; The feeding assembly (500) is used to feed the product to the feeding and conveying assembly (600); The loading and handling assembly (600) is used to transfer the product on the loading assembly (500) to the adsorption backlight platform, which is driven to move by the conveying assembly (1100). The image acquisition component 1 (700) is used to acquire images of the upper surface of the product on the adsorption backlight stage when the conveying component (1100) drives the adsorption backlight stage to move. The unloading and conveying assembly (800) is used to transfer the product on the adsorption-type backlight carrier to the unloading assembly (1000); The image acquisition component 2 (900) is used to acquire images of the lower surface of the product during the process of the unloading and handling component (800) transferring the product to the unloading component (1000); The feeding assembly (1000) delivers the inspected product.

Images