FPC screen printing appearance inspection jig

Abstract

The utility model relates to the technical field of flexible printed circuit board production, and provides an FPC screen printing appearance inspection jig which comprises a detection table, a lighting piece and a storage plate, a light through hole is formed in the detection table in a penetrating mode, the lighting piece is arranged below the light through hole, and the light emitting face of the lighting piece faces upwards; and the storage plate is arranged above the light through hole, is used for placing and positioning the FPC, and is made of a light-transmitting material. The FPC detection device and the FPC detection method have the effect of conveniently positioning and detecting the FPC.

Description

Technical Field

[0001] This application relates to the field of flexible printed circuit board (FPC) manufacturing technology, and in particular to an FPC screen printing appearance inspection fixture. Background Technology

[0002] Flexible printed circuit boards (PCBs), also known as flexible printed circuit boards, are printed circuit boards made of flexible insulating substrates. They are characterized by their bendability, foldability, and small size, and are widely used in electronic devices such as mobile phones, tablets, digital cameras, and laptops to achieve electrical connections between various electronic components.

[0003] Flexible printed circuit boards (FPCs) and screen printing stencils are closely related in the electronics manufacturing industry, with screen printing stencils being one of the commonly used tools in FPC manufacturing. In FPC manufacturing, a solder resist layer needs to be printed on the surface of the circuit board to prevent short circuits during soldering and to protect the circuitry and components on the board. Screen printing stencils are used to precisely print solder resist ink onto designated areas of the FPC. Through the mesh of the screen printing stencil, the ink is squeezed onto the FPC surface, forming a uniform solder resist layer.

[0004] After the FPC is screen-printed, the screen printing needs to be visually inspected to ensure product quality. Currently, this is mostly done manually by placing the FPC on an inspection table and then using a light source on the table to illuminate it from above (FPCs are translucent) so that workers can observe the screen printing.

[0005] Regarding the aforementioned technologies, since the lighting shines from top to bottom, it is prone to reflections on the FPC, which can interfere with the workers' vision. Therefore, improvements are needed. Utility Model Content

[0006] To facilitate the positioning and inspection of FPCs, this application provides an FPC screen printing appearance inspection fixture.

[0007] The FPC screen printing appearance inspection fixture provided in this application adopts the following technical solution:

[0008] An FPC screen printing appearance inspection fixture includes an inspection table, an illumination element, and a placement plate. A light-transmitting hole is provided through the inspection table. The illumination element is located below the light-transmitting hole with its light-emitting surface facing upward. The placement plate is located above the light-transmitting hole and is used to position the FPC to be placed. The placement plate is made of a light-transmitting material.

[0009] By adopting the above technical solution, when FPC needs to be inspected, the placement plate is first placed on the inspection table, and then the FPC to be inspected is placed on the placement plate. Next, the lighting is turned on to illuminate the FPC. Since the placement plate is translucent, the light generated by the lighting can pass through the placement plate and illuminate the FPC, so that the staff can inspect the appearance of the screen printing.

[0010] By illuminating the light from below, the angle of light reflection can be changed to some extent, preventing the reflected light from directly entering the observer's eyes. At the same time, the presence of the display plate can also play a certain role in absorption and reflection, thereby reducing glare during the inspection process.

[0011] Preferably, it also includes a positioning component for positioning the shelf.

[0012] By adopting the above technical solution, the positioning component can position the shelf and provide stability to the shelf.

[0013] Preferably, the positioning component includes a first positioning block, a second positioning block, a third positioning block, and a fourth positioning block, with each positioning block spaced apart on the surface of the detection table; each positioning block has a positioning groove, which is used to position the placement plate.

[0014] By adopting the above technical solution, the shelf is placed on each positioning block, and the shelf is stably placed due to the limiting effect of the positioning groove.

[0015] Preferably, each of the positioning blocks is further provided with a slot, the slot being located within the positioning groove, and a plurality of locking posts are connected to the placement plate, each locking post being respectively engaged in the slot.

[0016] By adopting the above technical solution, each locking pin is engaged in the slot, and the connection between the shelf and the positioning component is achieved by relying on static friction, thereby improving the stability of the shelf when it is placed.

[0017] Preferably, it further includes an adjustment component for adjusting the horizontal position of the lighting element.

[0018] By adopting the above technical solution, the horizontal position of the lighting component can be changed by adjusting the components, making it convenient for staff to adjust the horizontal position of the lighting component relative to the shelf according to actual needs.

[0019] Preferably, the adjustment assembly includes a fixed base, a servo motor, a lead screw, and a slider. The fixed base is connected to the detection table, the lead screw is horizontally rotatably connected to the fixed base, the servo motor is connected to the lead screw and is used to control the rotation of the lead screw, the slider is slidably connected to the lead screw, and the lighting element is disposed on the slider.

[0020] By adopting the above technical solution, the fixed base serves as a carrier. When adjustment is required, a servo motor can be run to control the rotation of the lead screw. The rotation of the lead screw is converted into the linear motion of the slider. Since the lighting component is mounted on the slider, the horizontal position of the lighting component can be changed.

[0021] Preferably, it also includes a lifting component, which is used to control the vertical movement of the adjusting component.

[0022] By adopting the above technical solution, the lifting component drives the entire adjustment component to move up and down, so as to change the vertical distance of the lighting component relative to the shelf.

[0023] Preferably, the lifting assembly includes a lifting cylinder and a connecting plate. The lifting cylinder has a stroke control mechanism. The connecting plate is disposed on the fixed base and connected to the lifting cylinder. The lifting assembly is symmetrically arranged at both ends of the fixed base.

[0024] By adopting the above technical solution, the lifting cylinder can control the vertical movement of the connecting plate, thereby driving the fixed seat to move up and down. The cylinder has a stroke control mechanism, which can control the cylinder piston rod to stop at a predetermined position, realizing precise mechanical actions (such as clamping, pushing, lifting, etc.) and providing continuous, stable and reliable pressure. Typical stroke control mechanisms include, but are not limited to, mechanical stops, magnetic switches with solenoid valves, and displacement sensors with controllers. These are existing technologies and will not be elaborated upon here.

[0025] Preferably, it further includes a pressing assembly for pressing the shelf onto each positioning block. The pressing assembly includes a linear cylinder and a pressure plate. The linear cylinder is connected to the pressure plate and is used to control the lifting and lowering of the pressure plate. The pressure plate is used to press the shelf.

[0026] By adopting the above technical solution, the clamping assembly can press the shelf onto each positioning block, further improving the stability of the shelf. During clamping, a linear cylinder is used to control the pressure plate to move in the direction close to the shelf, so that the pressure plate adheres to the shelf and exerts a downward pressure on the shelf. The linear cylinder also has a stroke control mechanism.

[0027] Preferably, the pressure plate is rotatably connected to the piston rod of the linear cylinder, and the rotation axis of the pressure plate is in the same straight line as the extension and retraction direction of the linear cylinder.

[0028] By adopting the above technical solution, when the pressure plate is above the shelf, the pressure plate and the shelf are not in contact. Workers can manually control the circumferential rotation of the pressure plate to change their relative positions before pressing, improving flexibility. In some work scenarios, such as when the shelf needs to be removed from the positioning assembly, the pressure plate can also be rotated so that it is not above the shelf, facilitating shelf detachment.

[0029] In summary, this application includes at least one of the following beneficial technical effects:

[0030] (1) By setting up a testing platform, lighting fixtures and a shelf, during inspection, the shelf is first placed on the testing platform, and then the FPC to be inspected is placed on the shelf. Then the lighting fixtures are turned on to illuminate from bottom to top, thereby reducing reflection and making it easier for staff to carry out the inspection.

[0031] (2) By setting up the locking posts and the locking slots, each locking post is locked in the locking slot, and the connection between the shelf and the positioning component is achieved by relying on the static friction force, thereby improving the stability of the shelf when it is placed.

[0032] (3) By setting up adjustment components, staff can easily adjust the horizontal position of the lighting components relative to the shelf according to actual needs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the inspection fixture in the embodiments of this application;

[0034] Figure 2 This is a schematic diagram of the structure of the inspection fixture in this embodiment of the application, omitting the storage plate;

[0035] Figure 3 This is a schematic diagram of the structure of the shelf in the embodiment of this application;

[0036] Figure 4 This is a partial structural schematic diagram of the inspection fixture in the embodiments of this application.

[0037] Reference numerals: 1. Testing table; 2. Illumination component; 3. Shelf plate; 4. Light transmission hole; 5. Positioning assembly; 51. First positioning block; 52. Second positioning block; 53. Third positioning block; 54. Fourth positioning block; 6. Locking post; 7. Locking slot; 8. Positioning groove; 9. Pressing assembly; 91. Linear cylinder; 92. Pressure plate; 10. Adjustment assembly; 101. Fixed base; 102. Servo motor; 103. Lead screw; 104. Slider; 11. Lifting assembly; 111. Lifting cylinder; 112. Connecting plate. Detailed Implementation

[0038] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.

[0039] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0041] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0042] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.

[0043] This application discloses an FPC screen printing appearance inspection fixture. (Refer to...) Figure 1 and Figure 2 The inspection fixture includes a testing table 1, an illumination element 2, and a shelf 3. The testing table 1 is horizontally positioned, with several support legs fixedly connected to one side, allowing it to be placed horizontally on the ground. A rectangular light-transmitting hole 4 is provided through the testing table 1. The illumination element 2 is installed below the light-transmitting hole 4, with its luminous surface facing upwards. The illumination element 2 is used to generate and emit light to achieve various lighting purposes and can be a lamp tube, LED light, or other existing lighting fixtures.

[0044] The placement plate 3 is positioned above the light-transmitting hole 4 and is used for placing the FPC. The placement plate 3 is made of a light-transmitting material, such as acrylic, glass, or PC. Specifically, a positioning assembly 5 is installed on the testing table 1 to position the placement plate 3. The positioning assembly 5 includes a first positioning block 51, a second positioning block 52, a third positioning block 53, and a fourth positioning block 54. The four positioning blocks are spaced apart on the surface of the testing table 1 and form a rectangle, located around the light-transmitting hole 4. Each positioning block has a positioning groove 8 for positioning the placement plate 3.

[0045] When FPC needs to be inspected, first place the shelf 3 on the inspection table 1, and then place the FPC to be inspected on the shelf 3. Next, turn on the lighting unit 2 to illuminate the screen. Since the shelf 3 is light-transmitting, the light generated by the lighting unit 2 can pass through the shelf 3 and illuminate the FPC, so that the staff can inspect the appearance of the screen printing.

[0046] By illuminating the light from the bottom up with the light from the illuminator 2, the reflection angle of the light can be changed to a certain extent, so that the reflected light does not directly enter the observer's eyes. At the same time, the presence of the display plate 3 can also play a certain role in absorption and reflection, thereby reducing the reflection during the inspection process.

[0047] Combination Figure 3 In some embodiments, four locking posts 6 are fixedly connected to the side of the placement plate 3 facing the detection table 1. Each of the four positioning blocks has a locking groove 7, which is located in the positioning groove 8. Each locking post 6 is locked in the locking groove 7. The connection between the placement plate 3 and the positioning component 5 is achieved by the action of static friction, thereby improving the stability of the placement plate 3 when it is placed.

[0048] The testing platform 1 is also equipped with a clamping assembly 9, which is arranged in four sets at intervals. Each clamping assembly 9 is used to clamp the placement plate 3 onto the positioning blocks. The clamping assembly 9 includes a linear cylinder 91 and a pressure plate 92. The linear cylinder 91 is connected to the pressure plate 92 and is used to control the lifting and lowering of the pressure plate 92. The linear cylinder 91 has a stroke control mechanism, which can control the cylinder piston rod to stop at a predetermined position to achieve precise mechanical actions (such as clamping, pushing, lifting, etc.) and provide continuous, stable and reliable pressure. The pressure plate 92 is located above the placement plate 3 and is used to clamp the placement plate 3. During clamping, the linear cylinder 91 controls the pressure plate 92 to move in a direction close to the placement plate 3, so that the pressure plate 92 fits against the placement plate 3 and exerts a downward pressure on the placement plate 3.

[0049] In this embodiment, the pressure plate 92 is rotatably connected to the piston rod of the linear cylinder 91 via a bearing, and the rotation axis of the pressure plate 92 and the extension / retraction direction of the linear cylinder 91 are on the same straight line. When the pressure plate 92 is above the shelf 3, the pressure plate 92 and the shelf 3 are not in contact. The operator can manually control the circumferential rotation of the pressure plate 92 to change the relative position of the pressure plate 92 and the shelf 3 before pressing, improving the flexibility of use. In some work scenarios, such as when it is necessary to remove the shelf 3 from the positioning component 5, the pressure plate 92 can also be rotated so that the pressure plate 92 is not above the shelf 3, making it easier for the shelf 3 to detach.

[0050] Combination Figure 4 In addition, an adjustment assembly 10 is installed below the testing platform 1, and the lighting element 2 is mounted on the adjustment assembly 10. The adjustment assembly 10 is used to adjust the horizontal position of the lighting element 2. The adjustment assembly 10 includes a fixed base 101, a servo motor 102, a lead screw 103, and a slider 104. The fixed base 101 is located below the light-transmitting hole 4 and is connected to the testing platform 1. The lead screw 103 is horizontally rotatably connected to the fixed base 101. The output shaft of the servo motor 102 is connected to the lead screw 103 and is used to control the rotation of the lead screw 103. The slider 104 is slidably connected to the lead screw 103, and the lighting element 2 is mounted on the slider 104. When adjustment is required, the servo motor 102 can be run to control the rotation of the lead screw 103. The rotation of the lead screw 103 is converted into linear motion of the slider 104. Since the lighting element 2 is mounted on the slider 104, the horizontal position of the lighting element 2 is changed.

[0051] In this embodiment, the adjustment component 10 is height-adjustable. A lifting component 11 is also installed on the testing platform 1. The lifting component 11 is connected to the adjustment component 10 and is used to control the vertical movement of the adjustment component 10 and the lighting element 2, thereby changing the vertical distance of the lighting element 2 relative to the placement plate 3. The lifting component 11 includes a lifting cylinder 111 and a connecting plate 112. The lifting cylinder 111 has a stroke control mechanism. The connecting plate 112 is fixedly connected to the fixed base 101 and connected to the piston rod of the lifting cylinder 111. The lifting cylinder 111 is used to drive the fixed base 101 to move up and down. The lifting components 11 are symmetrically arranged at both ends of the fixed base 101, and the two sets of lifting components 11 are used together to control the movement of the fixed base 101.

[0052] The implementation principle of the FPC screen printing appearance inspection fixture in this application embodiment is as follows: When performing inspection operations on flexible printed circuit boards (FPCs), the placement plate 3 should first be accurately placed on the inspection table 1, and then the FPC to be inspected should be stably placed on the placement plate 3. Then, the lighting element 2 is turned on to perform illumination operations. Since the placement plate 3 has light-transmitting properties, the light generated by the lighting element 2 can penetrate the placement plate 3, thereby illuminating the FPC and providing convenient conditions for workers to carry out screen printing appearance inspection work.

[0053] By using the upward illumination method of the lighting element 2, the angle of light reflection can be altered to some extent, effectively preventing reflected light from directly entering the observer's eyes. Simultaneously, the shelf 3 itself also plays a role in absorption and reflection, thereby reducing glare interference during the inspection process.

[0054] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An FPC screen printing appearance inspection jig, characterized by, The utility model relates to a kind of FPC detection device, including detection platform (1), lighting (2) and placing plate (3), the through hole (4) is set in the detection platform (1), the lighting (2) is located below the through hole (4), and the light-emitting surface is set upwards;The placing plate (3) is located above the through hole (4), and is used for FPC positioning, the placing plate (3) is made of light-transmitting material.

2. The FPC screen printing appearance inspection jig according to claim 1, characterized in that, Further comprising positioning assembly (5), the positioning assembly (5) is used for positioning the placing plate (3).

3. The FPC screen printing appearance inspection jig according to claim 2, characterized in that, The positioning assembly (5) includes first positioning block (51), second positioning block (52), third positioning block (53) and fourth positioning block (54), each positioning block is spaced apart on the tabletop of the detection platform (1);Each positioning block is provided with positioning slot (8), and each positioning slot (8) is used for positioning the placing plate (3).

4. The FPC screen printing appearance inspection jig according to claim 3, characterized in that, Each positioning block is also provided with clamping groove (7), and the clamping groove (7) is located in the positioning slot (8), and the placing plate (3) is connected with a plurality of clamping columns (6), each clamping column (6) is clamped in each clamping groove (7).

5. The FPC screen printing appearance inspection jig according to claim 1, wherein Further comprising adjusting assembly (10), the adjusting assembly (10) is used for adjusting the horizontal position of the lighting (2).

6. The FPC screen printing appearance inspection jig according to claim 5, wherein The adjusting assembly (10) includes fixed seat (101), servo motor (102), screw rod (103) and sliding block (104), the fixed seat (101) is connected with the detection platform (1), the screw rod (103) is horizontally rotatably connected to the fixed seat (101), the servo motor (102) is connected with the screw rod (103), and is used for controlling the rotation of the screw rod (103), the sliding block (104) is slidably connected to the screw rod (103), and the lighting (2) is arranged on the sliding block (104).

7. The FPC screen printing appearance inspection jig according to claim 6, wherein Further comprising lifting assembly (11), the lifting assembly (11) is used for controlling the vertical up-and-down movement of the adjusting assembly (10).

8. The FPC screen printing appearance inspection jig according to claim 7, characterized in that, The lifting assembly (11) includes lifting cylinder (111) and connecting plate (112), the lifting cylinder (111) has stroke control mechanism, the connecting plate (112) is arranged on the fixed seat (101) and connected with the lifting cylinder (111), and the lifting assembly (11) is symmetrically arranged at both ends of the fixed seat (101).

9. The FPC screen printing appearance inspection jig according to claim 3, characterized in that, Further comprising pressing assembly (9), the pressing assembly (9) is used for pressing the placing plate (3) on each positioning block, and the pressing assembly (9) includes linear cylinder (91) and pressing plate (92), the linear cylinder (91) is connected with the pressing plate (92), and is used for controlling the lifting of the pressing plate (92), and the pressing plate (92) is used for pressing the placing plate (3).

10. The FPC screen printing appearance inspection jig according to claim 9, wherein The pressing plate (92) is rotatably connected to the piston rod of the linear cylinder (91), and the rotation axis of the pressing plate (92) is in the same straight line with the extension direction of the linear cylinder (91).

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