Chip mounter and image acquisition module thereof

Abstract

The utility model relates to a kind of paster and its image acquisition module, image acquisition module includes mounting seat, lighting assembly, camera and transparent protection plate, mounting seat has light outlet, lighting assembly is located in mounting seat and light from light outlet, camera is located in mounting seat, transparent protection plate is located between lighting assembly and camera. Lighting assembly is used to light from light outlet, to irradiate to material, the reflected light of material is irradiated to camera through light outlet and transparent protection plate. The above-mentioned image acquisition module optimizes optical path design, and the illumination light of lighting assembly directly irradiates material, avoids the reflected light of illumination light on the surface of transparent protection plate incident to camera and causes interference to camera imaging, and improves the precision of imaging.

Description

Technical Field

[0001] This utility model relates to the field of chip mounter technology, and in particular to a chip mounter and its image acquisition module. Background Technology

[0002] As a key piece of equipment for electronic component placement, the accuracy of the vision inspection system in a pick-and-place machine directly affects component positioning and placement quality. Traditional pick-and-place machines mainly use a top light source to illuminate the components and a camera to acquire two-dimensional images for position detection.

[0003] In related technologies, to prevent dust from entering the camera lens, the illumination source of the image acquisition module is generally covered with protective glass. The light emitted by the illumination source passes through the protective glass and illuminates the component. The reflected light from the component then passes through the protective glass and is received by the lens to form an image. Since the light emitted by the illumination source is generally reflected by the protective glass, this reflected light can interfere with the lens's imaging and reduce the accuracy of the image. Utility Model Content

[0004] This utility model provides a patching machine and its image acquisition module to improve imaging accuracy.

[0005] An image acquisition module for a pick-and-place machine, the image acquisition module comprising:

[0006] Mounting base with light outlet;

[0007] A lighting component is mounted on the mounting base and emits light from the light outlet;

[0008] Camera, mounted on the mounting base; and

[0009] A transparent protective plate is disposed between the lighting component and the camera; the lighting component is used to emit light from the light outlet to illuminate the material, and the reflected light from the material illuminates the camera through the light outlet and the transparent protective plate.

[0010] In one embodiment, the lighting assembly includes a first light source module, the first light source module including a conical sidewall and a light-emitting element arranged along the surface of the conical sidewall, the conical sidewall having a first opening and a second opening, the diameter of the second opening being larger than the diameter of the first opening; the second opening being closer to the light outlet than the first opening, and the transparent protective plate being disposed between the first opening and the camera.

[0011] In one embodiment, the first light source module includes a first flexible circuit board surrounding the inner side of the conical sidewall, and the light-emitting element emits light from the side of the first flexible circuit board away from the conical sidewall.

[0012] In one embodiment, the lighting assembly includes a second light source module disposed circumferentially in the second opening and spaced apart from the first light source module.

[0013] In one embodiment, the second light source module is spaced apart from the light outlet in the radial direction of the light outlet.

[0014] In one embodiment, the mounting base includes a support plate and a groove wall extending circumferentially along the support plate, the support plate and the groove wall forming a mounting groove, the support plate having the light outlet; the second light source module extends along the inner side of the groove wall.

[0015] In one embodiment, the carrier plate and the first light source module are spaced apart in the axial direction of the camera.

[0016] In one embodiment, the support plate is detachably connected to the mounting base.

[0017] In one embodiment, the mounting base includes a bracket, a first housing, and a second housing arranged sequentially along the axial direction of the camera. The camera is mounted on the bracket, and the bracket has a through hole for passing cables through. The transparent protective plate is connected to the first housing, the first lighting component is connected to the second housing, and the support plate is connected to the second housing.

[0018] A chip mounter includes a frame and an image acquisition module according to any of the above embodiments, wherein the image acquisition module is disposed on the frame.

[0019] The above-described pick-and-place machine and its image acquisition module include a mounting base, an illumination assembly, a camera, and a transparent protective plate. The mounting base has a light outlet, the illumination assembly is mounted on the mounting base and emits light from the light outlet, the camera is mounted on the mounting base, and the transparent protective plate is positioned between the illumination assembly and the camera. The illumination assembly emits light from the light outlet to illuminate the material, and the reflected light from the material passes through the light outlet and the transparent protective plate to illuminate the camera. This image acquisition module optimizes the optical path design, allowing the illumination light from the illumination assembly to directly illuminate the material, avoiding reflections from the transparent protective plate that could interfere with camera imaging and thus improving imaging accuracy. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of an image acquisition module for a pick-and-place machine according to one embodiment;

[0022] Figure 2 for Figure 1 An exploded view of the image acquisition module shown.

[0023] Figure 3 This is a schematic diagram of the first light source module of an image acquisition module according to one embodiment;

[0024] Figure 4 for Figure 2 A magnified schematic diagram of point A of the image acquisition module shown;

[0025] Figure 5 for Figure 2 A magnified schematic diagram of point B of the image acquisition module shown.

[0026] Reference numerals: 10, Image acquisition module; 11, Camera; 12, Illumination assembly; 121, First light source module; 1211, Conical sidewall; 1212, Light-emitting element; 1213, First flexible circuit board; 12111, First opening; 12112, Second opening; 122, Second light source module; 1221, Second flexible circuit board; 1222, Second light-emitting element; 13, Mounting base; 131, Light outlet; 132, Support plate; 133, Slot wall; 134, Mounting slot; 135, Bracket; 1351, Through hole; 1352, Second mounting ramp; 136, First housing; 1361, First mounting ramp; 1362, First connecting plate; 137, Second housing; 1371, Second connecting plate; 14, Transparent protective plate. Detailed Implementation

[0027] The following detailed description of preferred embodiments is a preferred mode for carrying out the invention. This description is not intended to be limiting; it is provided to illustrate the general principles of the invention.

[0028] It should be understood that, for ease of understanding of the present invention, the terms "installation," "connection," "coupling," and "installation" in the following description refer to the connection relationships shown in the drawings. For example, "connection" can refer to a permanent connection or a detachable connection. Furthermore, "connection" can also refer to a direct connection or an indirect connection, or a connection via other auxiliary components. Therefore, the above terms should not be construed as limiting the actual connections of the various elements of the present invention.

[0029] It should be understood that the terms "length," "width," "top," "bottom," "front," "rear," "left," "right," "vertical," "horizontal," "upper," "lower," "external," and "internal" refer to the orientation or positioning relationship in the accompanying drawings to facilitate understanding of the invention, but do not limit the actual location or orientation of the invention. Therefore, the above terms should not be construed as limiting the actual location of the various elements of the invention.

[0030] It should be understood that the terms "first," "second," "an," "a," and "one" in the following description refer to "at least one" or "one or more" in the embodiments. In particular, the term "a" may refer to "one" in one embodiment and "more than one" in another embodiment. Therefore, the above terms should not be construed as limiting the actual number of elements of the present invention.

[0031] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0032] This utility model discloses a pick-and-place machine, which is an automated equipment used in electronic manufacturing. Its core function is to accurately place surface mount components onto designated positions on a substrate through a high-precision and high-efficiency mounting process.

[0033] The pick-and-place machine includes a frame (not shown) and an image acquisition module 10. The image acquisition module 10 is mounted on the frame. After the pick-and-place machine head picks up the surface mount component, the light source of the image acquisition module 10 illuminates the surface mount component. The camera 11 of the image acquisition module 10 takes a picture of the surface mount component. After subsequent image recognition processing, the position of the surface mount component can be detected. For example, the characteristic position points of the surface mount component can be identified as the mounting reference. The machine head adjusts the orientation of the surface mount component in space to ensure its alignment with the mounting position and ensure the mounting accuracy.

[0034] refer to Figure 1 and Figure 2The image acquisition module 10 includes a camera 11, an illumination component 12, a mounting base 13, and a transparent protective plate 14. The illumination component 12, camera 11, and transparent protective plate 14 are disposed on the mounting base 13, with the transparent protective plate 14 positioned between the illumination component 12 and the camera 11. The mounting base 13 has a light outlet 131. The illumination component 12 emits light from the light outlet 131 to illuminate the material. The reflected light from the material passes through the light outlet 131 and the transparent protective plate 14 to illuminate the camera 11, which captures the reflected light to form an image. The transparent protective plate 14 can be made of optical-grade polycarbonate, which is lightweight and has high light transmittance. Alternatively, the transparent protective plate 14 can also be made of inorganic materials such as glass. The image acquisition module 10 described above has an optimized optical path design. The illumination light from the illumination component 12 directly illuminates the material, avoiding the reflected light from the illumination component 12 on the surface of the transparent protective plate 14 from interfering with the imaging of the camera 11. This improves the imaging accuracy and, consequently, the surface mount accuracy.

[0035] Also refer to Figure 1 , Figure 2 and Figure 3 In some embodiments, the lighting assembly 12 may include a first light source module 121, which may include a conical sidewall 1211 and a light-emitting element 1212 arranged along the surface of the conical sidewall 1211. The conical sidewall 1211 has a first opening 12111 and a second opening 12112, the diameter of the second opening 12112 being larger than the diameter of the first opening 12111. The second opening 12112 is closer to the light outlet 131 than the first opening 12111, and a transparent protective plate 14 is disposed between the first opening 12111 and the camera 11. In some embodiments, the diameter of the light outlet 131 may be equal to the diameter of the second opening 12112.

[0036] Furthermore, in some embodiments, the first light source module 121 includes a first flexible circuit board 1213 surrounding the inner side of the conical sidewall 1211. A light-emitting element 1212 emits light from the side of the first flexible circuit board 1213 opposite to the conical sidewall 1211. The light-emitting element 1212 can be an LED. When the first light source module 121 is working, the surrounding distribution of the light-emitting elements 1212 allows the light emitted by the light-emitting elements 1212 to illuminate the material from multiple angles. The conical design of the conical sidewall 1211 allows the light emitted by the first light source module 121 to illuminate the material surface more evenly, thereby reducing local over-brightness and local under-brightness and achieving more uniform supplementary lighting.

[0037] Continue to refer to Figure 1 and Figure 2The lighting assembly 12 includes a second light source module 122, which is disposed circumferentially around the second opening 12112 and spaced apart from the first light source module 121. For example, the second light source module 122 and the first light source module 121 are spaced apart along the axis of the camera 11. The second light source module 122 is provided to provide supplementary lighting to the sides of the material when the first light source module 121 provides supplementary lighting to the front of the material, such as providing supplementary lighting to the periphery of a spherical convex structure, thereby providing more uniform and comprehensive supplementary lighting to the material surface and improving the image quality.

[0038] In some embodiments, the second light source module 122 is spaced apart from the light source port 131 in the radial direction of the light outlet 131, so that the light emitted by the second light source module 122 will not directly enter the light outlet port 131, thereby avoiding the light emitted by the second light source module 122 from directly entering the light outlet port 131 and interfering with the imaging of the camera 11.

[0039] Specifically, the mounting base 13 includes a support plate 132 and a groove wall 133 extending circumferentially along the support plate 132. The support plate 132 and the groove wall 133 enclose a mounting groove 134, and the support plate 132 has a light outlet 131. The second light source module 122 extends along the inner side of the groove wall 133. Figure 2 As shown, the support plate 132 can be rectangular, and the groove wall 133 extends along the four sides of the rectangle. The angle between the inner side of the groove wall 133 and the support plate 132 can be 90 degrees or more. A second flexible circuit board 1221 is provided along the inner side of the groove wall 133, and the second light-emitting element 1222 is provided on the side of the second flexible circuit board 1221 facing away from the groove wall 133.

[0040] Furthermore, a gap is provided between adjacent groove walls 133 to accommodate the bent portion of the second flexible circuit board 1221, preventing the flexible circuit board 1221 from bending excessively at the corners of the groove walls 133. Compared with the continuous groove wall structure, this gap structure design reduces the processing accuracy requirements and reduces the installation difficulty of the second flexible circuit board 1221.

[0041] Furthermore, the support plate 132 and the mounting base 13 are designed to be detachably connected. This modular structure facilitates the independent processing of the support plate 132, enables the rapid assembly of the support plate 132 and the mounting base 13, and allows for quick replacement in case of failure of the support plate 132, the groove wall 133, or the second light source module 122, without disassembling the entire mounting base 13, significantly improving the convenience of maintenance.

[0042] In some embodiments, the carrier plate 132 and the first light source module 121 are spaced apart in the axial direction of the camera 11 to facilitate the installation of the first light source module 121 on the mounting base 13 and avoid interference of the carrier plate 132 with the assembly of the first light source module 121.

[0043] Also refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 The mounting base 13 includes a bracket 135, a first housing 136, and a second housing 137 arranged sequentially along the axial direction of the camera 11. The camera 11 is mounted on the bracket 135, and the bracket 135 has a through hole 1351 for passing cables. A transparent protective plate 14 is connected to the first housing 136, a first light source module 121 is connected to the second housing 137, and a support plate 132 is connected to the second housing 137.

[0044] Specifically, such as Figure 1 As shown, the image acquisition module 10, once fully assembled, can be approximately a cuboid structure, while the support plate 132 can be a square structure. Adjacent components of the image acquisition module 10, such as the bracket 135, the first housing 136, the second housing 137, and the support plate 132, are detachably connected. The first housing 136 includes a first mounting ramp 1361, and the bracket 135 has a second mounting ramp 1352 that matches the first mounting ramp 1361. The first mounting ramp 1361 and the second mounting ramp 1352 have matching threaded holes. On the side of the first housing 136 facing the second housing 137, there is a pair of opposing first connecting plates 1362. The second housing 137 has a second connecting plate 1371 that matches the structure of the first connecting plate 1362. The first connecting plate 1362 and the second connecting plate 1371 have matching threaded holes. During the installation of the image acquisition module 10, the camera 11 is mounted and fixed on the bracket 135, the transparent protective plate 14 is mounted and fixed inside the first housing 136, the second housing 137 houses and mounts the first light source module 121, and the carrier plate 132 mounts the second light source module 122. After the corresponding components are installed, as shown... Figure 4 As shown, the first mounting ramp 1361 of the first housing 136 and the second mounting ramp 1352 of the bracket 135 are detachably connected after mating by threaded fasteners such as screws. Figure 5 As shown, the second connecting plate 1371 accommodates and matches the first connecting plate 1362, and then achieves a detachable connection through threaded fasteners such as screws. The second housing 137 and the support plate 132 are also detachably connected through threaded fasteners. The image acquisition module 10 is then fully installed. This structural design enables modular and rapid assembly, while also facilitating the maintenance and replacement of individual components.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0046] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An image acquisition module, characterized in that, For use in a pick-and-place machine, the image acquisition module includes: Mounting base with light outlet; A lighting component is mounted on the mounting base and emits light from the light outlet; Camera, mounted on the mounting base; and A transparent protective plate is disposed between the lighting component and the camera; the lighting component is used to emit light from the light outlet to illuminate the material, and the reflected light from the material illuminates the camera through the light outlet and the transparent protective plate.

2. The image acquisition module according to claim 1, characterized in that, The lighting assembly includes a first light source module, the first light source module including a conical sidewall and a light-emitting element arranged along the surface of the conical sidewall, the conical sidewall having a first opening and a second opening, the diameter of the second opening being larger than the diameter of the first opening; The second opening is closer to the light outlet than the first opening, and the transparent protective plate is disposed between the first opening and the camera.

3. The image acquisition module according to claim 2, characterized in that, The first light source module includes a first flexible circuit board surrounding the inner side of the conical sidewall, and the light-emitting element emits light from the side of the first flexible circuit board away from the conical sidewall.

4. The image acquisition module according to claim 2, characterized in that, The lighting assembly includes a second light source module, which is disposed circumferentially in the second opening and is spaced apart from the first light source module.

5. The image acquisition module according to claim 4, characterized in that, The second light source module is spaced apart from the light outlet in the radial direction of the light outlet.

6. The image acquisition module according to claim 4, characterized in that, The mounting base includes a support plate and a groove wall extending circumferentially along the support plate. The support plate and the groove wall enclose a mounting groove, and the support plate has the light outlet. The second light source module extends along the inner side of the groove wall.

7. The image acquisition module according to claim 6, characterized in that, The support plate and the first light source module are spaced apart along the axial direction of the camera.

8. The image acquisition module according to claim 6, characterized in that, The support plate is detachably connected to the mounting base.

9. The image acquisition module according to claim 6, characterized in that, The mounting base includes a bracket, a first housing, and a second housing arranged sequentially along the axial direction of the camera. The camera is mounted on the bracket, and the bracket has a through hole for passing a cable through. The transparent protective plate is connected to the first housing, the first light source module is connected to the second housing, and the carrier plate is connected to the second housing.

10. A pick-and-place machine, characterized in that, It includes a rack and an image acquisition module as described in any one of claims 1-9, wherein the image acquisition module is disposed on the rack.

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