Assembling method of front-end assembly and imaging equipment

Abstract

The invention provides an assembling method of a front-end assembly and imaging equipment. The front end assembly comprises a height fixing assembly and a circuit board assembly. The height fixing assembly comprises a mounting seat and a lens. The assembling method of the front-end assembly comprises the steps of adjusting the height fixing assembly, AA adjusting the front-end assembly and welding and fixing the circuit board assembly and the height fixing assembly. The step of adjusting the height fixing assembly comprises the steps that the height fixing assembly is placed in a height fixing tool, the lens is rotated, and the assembly height of the lens is adjusted according to measurement data of the height fixing tool. After the front end assembly AA is adjusted, the circuit board assembly and the height fixing assembly are welded and fixed, compared with screw fixation, the production efficiency is improved, stable connection is formed, and the advantages of being high in assembly efficiency, high in connection strength and the like are achieved.

Description

Technical Field

[0001] This application relates to the field of machine vision technology, and in particular to a method for assembling front-end components and an imaging device. Background Technology

[0002] With the increasing maturity of vision technology, its applications are becoming more and more widespread. Imaging equipment is typically used for inspection when employing vision technology. The imaging equipment is the core component of a machine vision system, essentially acting as the "eye" of the machine vision system. It is responsible for acquiring images of the product to be inspected and transmitting them to the controller within the imaging system for image processing. The imaging equipment consists of a lens assembly and a circuit board assembly. These components are fixed together using screws. Screw fixing not only complicates the assembly process and reduces production efficiency, but also poses a risk of loosening, affecting structural stability. Summary of the Invention

[0003] This application provides a method for assembling a front-end component and an imaging device that can improve structural stability.

[0004] This application provides a method for assembling a front-end component, the front-end component including a height-fixing component and a circuit board component, the height-fixing component including a mounting base and a lens, and the method for assembling the front-end component including: Adjusting the height-fixing component includes: placing the height-fixing component into the height-fixing fixture, rotating the lens, and adjusting the assembly height of the lens according to the measurement data of the height-fixing fixture; AA adjusts the height-fixing component and the circuit board assembly; The circuit board assembly and the height-fixing assembly are welded and fixed in place.

[0005] Further, the circuit board assembly includes a circuit board having solder holes, the mounting base includes solder posts assembled to the solder holes, and soldering the circuit board assembly to the height-fixing assembly includes: The welding post is welded to the circuit board.

[0006] Furthermore, the diameter of the welding column is smaller than the diameter of the welding hole.

[0007] Furthermore, the circuit board includes an FPC board, the circuit board assembly includes a reinforcing plate fixed to the FPC board, a photosensitive device is provided on the FPC board, the reinforcing plate and the photosensitive device are located on opposite sides of the FPC board, and the solder hole penetrates the FPC board and the reinforcing plate.

[0008] Furthermore, the reinforcing plate is provided with a welding coating.

[0009] Furthermore, the circuit board assembly includes a circuit board, and the assembly method includes: Before AA adjusts the front-end assembly, an adhesive layer is applied to the circuit board.

[0010] Furthermore, the height-fixing component includes a clamping ring and fasteners, the mounting base includes a lens mount, the lens mount includes an elastic portion, and the assembly method of the front end component further includes: Assembling the height-fixing component includes: The clamping ring is fitted around the periphery of the elastic part; Rotate the lens to fix it to the lens mount; Assemble the fasteners to the clamping ring to pre-secure the lens and the lens mount.

[0011] Furthermore, the height adjustment component includes: Tighten the fastener.

[0012] Further, the clamping ring includes a front surface, a rear surface opposite to the front surface, and a first mark disposed on the rear surface; when assembling the clamping ring, the first mark faces the mounting base side; and / or, The clamping ring includes an outer diameter surface, on which a second mark is provided. When assembling the clamping ring, the second mark faces upward.

[0013] Furthermore, the mounting base includes a fixing plate and a base plate integrally extending from the fixing plate, the lens mount integrally extending from the fixing plate, and the base plate located below the lens mount for fixing to the housing of the imaging device.

[0014] This application also provides an imaging device, including a housing and at least one front-end component assembled by the assembly method, wherein the housing forms a receiving cavity and the front-end component is located within the receiving cavity.

[0015] The assembly method of this application uses a height-fixing fixture to fix the lens height. After the front-end component AA is adjusted, the circuit board component and the height-fixing component are welded and fixed. Compared with screw fixing, this method improves production efficiency and forms a stable connection, with the characteristics of high assembly efficiency and high connection strength. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front-end component according to an embodiment of this application; Figure 2 yes Figure 1 A schematic diagram of the height-fixing component is shown; Figure 3 yes Figure 2 A schematic diagram of the mounting base shown; Figure 4 yes Figure 1Schematic diagram of the circuit board assembly shown; Figure 5 is Figure 4 Schematic diagram of another perspective of the circuit board assembly shown; Figure 6 is Figure 1 Schematic diagram of another perspective of the front-end component shown; Figure 7 is Figure 1 Side view of the front-end component shown, where only a part of the circuit board assembly is shown; Figure 8 is Figure 4 Schematic diagram of another embodiment of the circuit board assembly shown; Figure 9 is Figure 2 Schematic diagram of another embodiment of the height-fixing component shown; Figure 10 is Figure 3 Schematic diagram of another embodiment of the mounting base shown; Figure 11 is Figure 10 Schematic diagram of the mounting base after being assembled with the lens; Figure 12 Is a flowchart of a process for assembling the front-end component in an embodiment of the present application; Figure 13 Is another flowchart of a process for assembling the front-end component in an embodiment of the present application; Figure 14 Is yet another flowchart of a process for assembling the height-fixing component in an embodiment of the present application. Specific Embodiments

[0017] Here, the technical solutions in the embodiments (or "embodiments") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description involves the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0018] If there are terms related to directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), then such terms are only used to explain the relative positional relationships and movement conditions between components in a certain specific posture (as shown in the accompanying drawings); if this specific posture changes, then the directional indication or positional relationship also changes accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only for the purpose of convenient description and cannot be understood as indicating or implying relative importance.

[0019] Refer Figures 1 to 3The front-end component of the embodiments of this application includes a height-fixing component 1 and a circuit board component 2 fixed to the height-fixing component 1.

[0020] The height-fixing assembly 1 includes a lens 11, a mounting base 12, a clamping ring 13, and a fastener 14. The mounting base 12 includes a lens mount 121. In one embodiment, the lens 11 is threadedly connected to the lens mount 121.

[0021] The lens mount 121 includes multiple elastic parts 1211. The lens 11 includes a lens barrel 111, a positioning part 112 connected to the lens barrel 111, and a lens element 113 disposed on the lens barrel 111. The multiple elastic parts 1211 surround the periphery of the positioning part 112.

[0022] The clamping ring 13 compresses the elastic part 1211, causing it to deform and press the positioning part 112, thereby completely fixing the lens 11 at the position of the clamping ring 13, resulting in better stability between the lens 11 and the lens mount 121. At the same time, compared with using glue for fixing, assembly is more convenient and disassembly is easier, reducing maintenance costs. It also reduces the requirements for the shape of the lens 11, making it more adaptable.

[0023] In one embodiment, the lens 11 is focused by rotating it, and after focusing is complete, the lens 11 is fixed by the clamping ring 13.

[0024] In one embodiment, the clamping ring 13 has a notch 131 and a first fixing part 132 and a second fixing part 133 located on both sides of the notch 131. When the fastener 14 fixes the first fixing part 132 and the second fixing part 133, the notch 131 is reduced, thereby reducing the inner diameter of the clamping ring 13. The clamping ring 13 then compresses the elastic part 1211, causing it to deform.

[0025] In one embodiment, the first fixing part 132 is provided with a first assembly hole (not shown), and the second fixing part 133 is provided with a second assembly hole (not shown). After the clamping ring 13 is sleeved around the elastic part 1211, the fastener 14 is assembled in the first assembly hole and the second assembly hole to fix the first fixing part 132 and the second fixing part 133.

[0026] The second assembly hole can be a through hole or a blind hole. The fastener 14 can be a screw or a bolt. The fastener 14 can be fixed to the second fixing part 133, or it can pass through the second assembly hole and be fixed to a nut.

[0027] In one embodiment, the clamping ring 13 is provided with a first clearance groove 134 located on one side of the first fixing part 132 to facilitate the assembly of the fastener 14.

[0028] In one embodiment, the clamping ring 13 is provided with a second clearance groove 135 located on one side of the second fixing part 133 to facilitate the assembly of the fastener 14.

[0029] In one embodiment, the clamping ring 13 includes a front surface 136 facing the lens barrel 111 and a rear surface 137 opposite to the front surface 136. The clamping ring 13 includes a first marking 1371 disposed on the rear surface 137. When assembling the clamping ring 13, the first marking 1371 faces away from the lens barrel 111, i.e., towards the mounting base 12, which facilitates distinguishing the assembly direction and improves assembly efficiency. After the clamping ring 13 is assembled, the fastener 14 is located on the left side of the circuit board assembly 2, which facilitates locking and can prevent assembly errors that would prevent the clamping ring 13 from being tightened, thus improving assembly efficiency.

[0030] In one embodiment, the first identifier 1371 is a raised rib. The first identifier 1371 may also be a pit, a dot, or a bump, etc.

[0031] In one embodiment, the clamping ring 13 includes an outer diameter surface 138, on which a second mark 1381 is provided. When assembling the clamping ring 13, the second mark 1381 faces upward, which makes it easy to distinguish the front and back, resulting in better production consistency and avoiding the problem that the fastener 14 is difficult to rotate if the positions of the first fixing part 132 and the second fixing part 133 are reversed.

[0032] In one embodiment, the second identifier 1381 is a plane. The second identifier 1381 may also be a pit, a dot, or a bump, etc.

[0033] Combination Figure 10 In one embodiment, the lens mount 121 includes a retaining edge 1212 located behind the elastic portion 1211 to define the mounting position of the clamping ring 13.

[0034] When assembling the height-fixing component 1, the clamping ring 13 is fitted onto the periphery of the elastic part 1211 and fits against the retaining edge 1212. After assembly, the first assembly hole and the second assembly hole are on the left side of the lens mount 121. The lens 11 is threaded onto the lens mount 121, and the lens 11 is rotated to move it to a suitable position in the axial direction of the lens mount 121. Then, the fastener 14 is assembled to pre-fix the lens 11 and the lens mount 121.

[0035] When the lens 11 and lens mount 121 are pre-fixed, the lens 11 can still rotate.

[0036] In one embodiment, the mounting base 12 includes a front side 122 and a rear side 123 disposed opposite to the front side 122. A lens mount 121 extends from the front side 122. The rear side 123 is provided with a plurality of protruding mounting bosses 1231 and a plurality of welding posts 1232. The rear side 123 is also provided with a clearance groove 1233.

[0037] In one embodiment, the welding column 1232 is riveted to the mounting base 12, which reduces processing costs.

[0038] In one embodiment, the height - fixing component 1 is placed into a height - fixing tooling (not shown), and the upper end of the lens 11 is rotated so that the lens 11 moves along the axial direction of the lens holder 121. With the data measurement of the height - fixing tooling, the distance between the upper end of the lens 11 and the mounting boss 1231 is adjusted to the set value L. Finally, the fastener 14 is tightened so that the lens 11 and the lens holder 121 are fixed in place.

[0039] When assembling the height - fixing component 1, the fastener 14 is appropriately rotated so that a pre - tightening force is generated between the threads of the lens 11 and the lens holder 121, ensuring that there is no obvious shaking between the two, and the lens 11 can be moved by rotation. After height - fixing is completed, the fastener 14 is tightened again.

[0040] The outer side surfaces of the multiple mounting bosses 1231 are used as the mounting reference surfaces when the front - end component is assembled with the housing of the imaging device, and are also the reference surfaces during the measurement of the height - fixing tooling, so that the assembly reference and the adjustment reference can be unified.

[0041] See Figures 4 to 6 , the circuit - board component 2 is fixedly welded to the height - fixing component 1. Compared with screw fixing, the production efficiency is improved, and a stable connection is formed, featuring high assembly efficiency and high connection strength.

[0042] In one embodiment, the circuit - board component 2 includes a circuit board 21. The circuit board 21 is provided with multiple welding holes 211. Multiple welding posts 1232 are respectively assembled into the multiple welding holes 211 to fixedly weld the circuit - board component 2, improving the fixing strength and stability.

[0043] The welding posts 1232 are made of weldable materials or electroplated with weldable coatings for fixed welding with the circuit - board component 2.

[0044] In one embodiment, the circuit board 21 includes a FPC board. The circuit - board component 2 includes a reinforcing plate 22 fixed to the FPC board. A photosensitive device 212 is provided on the FPC board. The reinforcing plate 22 and the photosensitive device 212 are located on opposite sides of the FPC board, and the welding holes 211 penetrate through the FPC board and the reinforcing plate 22.

[0045] The circuit board 21 is provided with an avoidance notch 213 for avoiding the mounting boss 1231.

[0046] In one embodiment, a socket 214 is provided on the circuit board 21. The socket 214 and the photosensitive device 212 are located on the same side of the circuit board 21. The reinforcing plates 22 are provided in multiple numbers. One reinforcing plate 22 is located on the back of the photosensitive device 212 to increase the strength of the circuit board 21 at the photosensitive device 212; another reinforcing plate 22 is located on the back of the socket 214 to increase the strength of the circuit board 21 at the socket 214.

[0047] In another embodiment, the circuit board 21 can also be an FR4 board, a semi-flexible board, etc.

[0048] The avoidance groove 1233 is used to avoid the photosensitive device 212 and other electronic devices on the circuit board 21. Optical devices such as filters can also be assembled in the avoidance groove 1233 as needed to improve the product performance.

[0049] In one embodiment, after the front-end component AA is adjusted, the height-fixing component 1 and the circuit board component 2 are welded and fixed. AA (Active Alignment) adjustment is a precise alignment technology that adjusts the relative positions of components through real-time feedback. During the assembly process, optical / mechanical performance parameters (such as MTF, focal length, optical axis deviation) are dynamically detected, and micron-level correction is performed using a high-precision motion mechanism.

[0050] In one embodiment, AA adjustment can be performed through an AA device, which is more simple and convenient to operate and has higher efficiency. In another embodiment, AA adjustment can also be performed manually.

[0051] During AA adjustment, the position of the circuit board component 2 can be fixed and the height-fixing component 1 can be adjusted, or the position of the height-fixing component 1 can be fixed and the circuit board component 2 can be adjusted, or both the circuit board component 2 and the height-fixing component 1 can be adjusted.

[0052] In one embodiment, the assembled height-fixing component 1 and circuit board component 2 are placed together in an AA device for AA adjustment. Through AA adjustment, the angles and distances between the circuit board component 2 and the height-fixing component 1 are adjusted so that the centrality between the photosensitive device 212 on the circuit board 21 and the lens 11 meets the requirements and a clear image is obtained, thereby completing the focusing of the circuit board component 2 and the lens 11. After the AA process is completed, the mounting seat 12 and the circuit board component 2 are welded and fixed through a welding process.

[0053] In one embodiment, the diameter of the welding post 1232 is smaller than the diameter of the welding hole 211 to reserve adjustment margin for the AA process.

[0054] See Figure 7 , because the AA process requires reserving adjustment height, there is a gap 210 between the assembled circuit board 21 and the mounting seat 12. The existence of the gap 210 will cause dust to fall onto the photosensitive device 212 on the circuit board 21 through the gap 210 during the turnover of materials or the overall assembly of the imaging device, ultimately affecting the imaging effect.

[0055] See Figure 8, in order to prevent external dust from falling onto the photosensitive device 212 on the circuit board 21 through the gap 210, before putting the height-fixing component 1 and the circuit board component 2 into the AA process equipment, first set an adhesive layer 215 on the circuit board 21, and then adjust the focus of the circuit board component 2 and the lens 11 through the AA process. The adhesive layer 215 can fill the gap 210, thereby achieving good sealing of the photosensitive device 212 on the circuit board 21 and preventing dust from falling onto the surface of the photosensitive device 212.

[0056] The adhesive layer 215 can be a sealant or a structural adhesive.

[0057] See Figure 9 , in one embodiment, the clamping ring 13 is cancelled, and the lens 11 and the lens holder 121 are fixed by dispensing glue. Before fixing by dispensing glue, the lens 11 and the lens holder 121 are tightly fitted through threads, so that the lens 11 and the lens holder 121 can be kept coaxial as much as possible, avoiding difficulties in the subsequent assembly of the circuit board component 2.

[0058] See Figures 10 to 11 , in one embodiment, the mounting seat 12 includes a fixing plate 124 and a bottom plate 125 integrally extending from the fixing plate 124. The lens holder 121 integrally extends from the fixing plate 124. The integral mounting seat 12 reduces the connecting parts and improves the structural stability of the imaging device. The circuit board component 2 is fixed to the fixing plate 124. The mounting boss 1231, the welding post 1232 and the avoiding groove 1233 are arranged on the fixing plate 124.

[0059] In one embodiment, the bottom plate 125 is fixed to the outer shell of the imaging device to fix the front-end component.

[0060] In one embodiment, the mounting seat 12 includes a side plate 126 connecting the bottom plate 125 and the fixing plate 124. The side plate 126 contacts the outer shell of the imaging device for heat transfer, so as to timely dissipate the heat generated by the circuit board component 2 to the outside of the imaging device, ensuring the imaging quality of the photosensitive device 212 of the imaging device. <\\

[0061] See Figures 12 to 14 , the embodiment of the present application provides an assembly method for a front-end component. The front-end component includes a height-fixing component 1 and a circuit board component 2. The height-fixing component 1 includes a mounting seat 12 and a lens 11. The assembly method for the front-end component includes: Adjusting the height-fixing component 1, including: putting the height-fixing component 1 into the height-fixing tooling, rotating the lens 11, and adjusting the assembly height of the lens 11 according to the measurement data of the height-fixing tooling; Performing AA adjustment on the front-end component; Welding and fixing the circuit board component 2 and the height-fixing component 1.

[0062] Welding the circuit board assembly 2 and the height-fixing assembly 1 together improves production efficiency compared to screw fixing and forms a stable connection, featuring high assembly efficiency and high connection strength.

[0063] Combination Figures 4 to 6 In one embodiment, the circuit board assembly 2 includes a circuit board 21 with solder holes 211. The mounting base 12 includes solder posts 1232 assembled to the solder holes 211. Soldering the circuit board assembly 2 and the height-fixing assembly 1 includes: Welding column 1232 to circuit board 21.

[0064] In one embodiment, the diameter of the welding column 1232 is smaller than the diameter of the welding hole 211.

[0065] In one embodiment, the circuit board 21 includes an FPC board, the circuit board assembly 2 includes a reinforcing plate 22 fixed to the FPC board, a photosensitive device 212 is provided on the FPC board, the reinforcing plate 22 and the photosensitive device 212 are located on opposite sides of the FPC board, and a solder hole 211 penetrates the FPC board and the reinforcing plate 22.

[0066] In one embodiment, the reinforcing plate 22 is provided with a welding coating.

[0067] In one embodiment, the circuit board assembly 2 includes a circuit board 21, and the assembly method includes: Before adjusting the front-end assembly, an adhesive layer 215 is applied to the circuit board 21.

[0068] In one embodiment, the height-fixing component 1 includes a clamping ring 13 and a fastener 14. The mounting base 12 includes a lens mount 121. The lens mount 121 includes an elastic portion 1211. The assembly method of the front-end component further includes: Assemble the height-fixing component 1, including: The clamping ring 13 is fitted around the elastic part 1211; Rotate lens 11 to fix it to lens mount 121; Assemble the fastener 14 to the clamping ring 13 to pre-secure the lens 11 and the lens mount 121.

[0069] The lens 11 is secured by the clamping ring 13 and the fastener 14, which facilitates the assembly and disassembly of the lens 11 for maintenance.

[0070] The height adjustment component 1 also includes a locking fastener 14.

[0071] In one embodiment, the clamping ring 13 includes a front surface 136, a rear surface 137 opposite to the front surface 136, and a first mark 1371 disposed on the rear surface 137. When assembling the clamping ring 13, the first mark 1371 faces the mounting base 12.

[0072] In one embodiment, the clamping ring 13 includes an outer diameter surface 138, on which a second mark 1381 is provided. When assembling the clamping ring 13, the second mark 1381 faces upward.

[0073] The first identifier 1371 and the second identifier 1381 can be set individually or both can be set.

[0074] In one embodiment, the mounting base 12 includes a fixing plate 124 and a base plate 125 integrally extending from the fixing plate 124. The lens mount 121 is integrally extended from the fixing plate 124, and the base plate 125 is located below the lens mount 121 for fixing to the housing of the imaging device.

[0075] This application also provides an imaging device, including a housing and a front-end component assembled by any assembly method, wherein the housing forms a receiving cavity and the front-end component is located within the receiving cavity.

[0076] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for assembling a front-end component, characterized in that, The front-end assembly includes a height-fixing component and a circuit board assembly. The height-fixing component includes a mounting base and a lens. The assembly method of the front-end assembly includes: Adjusting the height-fixing component includes: placing the height-fixing component into the height-fixing fixture, rotating the lens, and adjusting the assembly height of the lens according to the measurement data of the height-fixing fixture; AA adjusts the height-fixing component and the circuit board assembly; The circuit board assembly and the height-fixing assembly are welded and fixed in place.

2. The assembly method of the front-end component according to claim 1, characterized in that, The circuit board assembly includes a circuit board with soldering holes. The mounting base includes soldering posts assembled to the soldering holes. Soldering the circuit board assembly and the height-fixing assembly includes: The welding post is welded to the circuit board.

3. The method for assembling front-end components according to claim 2, characterized in that, The diameter of the welding column is smaller than the diameter of the welding hole.

4. The method for assembling the front-end component according to claim 2, characterized in that, The circuit board includes an FPC board, and the circuit board assembly includes a reinforcing plate fixed to the FPC board. A photosensitive device is provided on the FPC board, and the reinforcing plate and the photosensitive device are located on opposite sides of the FPC board. The solder hole penetrates the FPC board and the reinforcing plate.

5. The method for assembling the front-end component according to claim 4, characterized in that, The reinforcing plate is provided with a welding coating.

6. The method for assembling a front-end component according to claim 1, characterized in that, The circuit board assembly includes a circuit board, and the assembly method includes: Before AA adjusts the front-end assembly, an adhesive layer is applied to the circuit board.

7. The method for assembling a front-end component according to any one of claims 1 to 6, characterized in that, The height-fixing component includes a clamping ring and fasteners; the mounting base includes a lens mount, which includes an elastic portion; and the assembly method of the front-end component further includes: Assembling the height-fixing component includes: The clamping ring is fitted around the periphery of the elastic part; Rotate the lens to fix it to the lens mount; Assemble the fasteners to the clamping ring to pre-secure the lens and the lens mount.

8. The method for assembling a front-end component according to claim 7, characterized in that, The adjustable height control component includes: Tighten the fastener.

9. The method for assembling a front-end component according to claim 7, characterized in that, The clamping ring includes a front surface, a rear surface opposite to the front surface, and a first mark disposed on the rear surface. When assembling the clamping ring, the first mark faces the mounting base side; and / or, The clamping ring includes an outer diameter surface, on which a second mark is provided. When assembling the clamping ring, the second mark faces upward.

10. The method for assembling a front-end component according to claim 7, characterized in that, The mounting base includes a fixing plate and a base plate integrally extending from the fixing plate. The lens mount is integrally extended from the fixing plate, and the base plate is located below the lens mount for fixing to the housing of the imaging device.

11. An imaging device, characterized in that, The device includes a housing and at least one front-end assembly assembled by the assembly method of any one of claims 1 to 10, the housing forming a receiving cavity, and the front-end assembly located within the receiving cavity.

Images