Pcb character printer
By introducing Y-axis and X-axis electric slide rails, a quadrilateral positioning frame, and adjustable support rods into a PCB text printer, bidirectional movement and precise positioning along the X and Y axes are achieved. This solves the problems of movement flexibility, stability, and positioning adaptability of existing equipment, and improves printing efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ZHEJIANG KAIJIELI ELECTRONICS CO LTD
- Filing Date
- 2025-12-30
- Publication Date
- 2026-05-12
AI Technical Summary
Existing PCB text printers suffer from poor mobility, insufficient table stability, low positioning reliability, and poor adaptability of positioning levers, resulting in low printing efficiency and poor compatibility.
The system employs a Y-axis electric slide rail and an X-axis electric slide rail working in tandem, combined with a quadrilateral positioning frame and height-adjustable support rods, to achieve flexible bidirectional movement along the X and Y axes. Through a dual positioning structure of positioning holes and positioning pressure rods, it works with cylinders and robotic arms to precisely position and flip PCB boards. Sensors are used to detect and correct the levelness of the worktable.
It enables efficient and accurate printing of PCB boards, improves the versatility and production efficiency of the equipment, ensures printing accuracy and stability, and reduces production costs.
Smart Images
Figure CN122008709A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of PCB board text printer technology, specifically PCB board text printers. Background Technology
[0002] PCB text printers are one of the core pieces of equipment in the electronics manufacturing industry. They are mainly used to accurately print component reference numbers, company logos, version numbers and other marking text and symbols on the surface of PCBs. Currently, inkjet printing or laser marking technology is the mainstream. Its core structure usually includes a worktable, printing execution components, positioning mechanism and frame. It is widely used in the PCB production process of various electronic devices such as consumer electronics and industrial control.
[0003] Existing PCB text printers often only allow unidirectional (left-right on the X-axis or forward-backward on the Y-axis) movement of their printing execution components, failing to achieve bidirectional synchronous and flexible movement along both the X and Y axes. This results in limited printing paths and low work efficiency. Traditional equipment relies heavily on the worktable itself to support the PCB for movement, leading to a bulky worktable structure and potential instability. The positioning method relies solely on small holes around the PCB for single-point positioning, lacking auxiliary fixing structures, resulting in unstable PCB positioning and easy displacement during printing. Furthermore, the positioning pressure rods in existing equipment are fixed in position and cannot be adjusted according to the positioning requirements of PCBs of different sizes. In particular, the rear positioning pressure rod cannot move flexibly, resulting in poor adaptability and difficulty in meeting the production needs of diverse PCB specifications. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a PCB board text printer, which solves the problems of poor mobility, insufficient worktable stability, low positioning reliability, and poor adaptability of positioning pressure rods.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a PCB text printer, comprising a housing, with Y-axis electric slide rails fixedly connected to the left and right sides of the inner wall of the housing. Two Y-axis electric slide rails are connected to an X-axis electric slide rail at their closest points via sliders. The front end of the X-axis electric slide rail is connected to the printer body via a slider. A quadrilateral positioning frame is fixedly connected to the middle of the inner wall of the housing. The top of the positioning frame is connected to a worktable via multiple evenly distributed, height-adjustable support rods. A positioning hole is provided at the top of the worktable. Multiple cylinders are evenly arranged around the positioning frame below the worktable. A C-shaped lifting plate (first type) and a second lifting plate (second type) slidably connected to the inner wall of the first lifting plate are connected to the top of each cylinder. Positioning pressure rods are fixedly connected to the tops of both the first and second lifting plates. These positioning pressure rods slide through the worktable and extend above it. The left and right ends of the rear cylinders are connected to the second lifting plate via stabilizing components. A support frame is fixedly connected to the inner wall of the positioning frame. A robotic arm is fixedly connected to the left side of the top of the fixed frame on the bottom side of the inner wall of the housing.
[0006] Preferably, the stabilizing component includes connecting rods located at the left and right ends of the rear cylinder, and a fixing rod is fixedly connected to the top of each of the two connecting rods. The top of the fixing rod is fixedly connected to the bottom of the lifting plate two.
[0007] Preferably, an electric push rod is fixedly connected to the inner rear wall of the support frame, and the front end of the electric push rod is fixedly connected to the rear end of the rear cylinder.
[0008] Preferably, the top of the positioning frame is fixedly connected to a plurality of support rods, the tops of which are fixedly connected to the bottom of the worktable. The support rods are threaded adjustment rods, and their tops are rotatably connected to the bottom of the worktable through ball joints.
[0009] Preferably, four cylinders are provided, corresponding to the front, back, left and right sides of the worktable respectively, and the four cylinders synchronously drive the lifting plate one and the lifting plate two to rise and fall. The cylinders on the front, left and right sides are located at the bottom end of the lifting plate one, and the cylinder on the rear side is located at the bottom end of the lifting plate two.
[0010] Preferably, the top front side of the workbench is provided with multiple positioning holes, the diameter of which is adapted to the positioning post of the PCB board.
[0011] Preferably, a levelness sensor is fixedly connected to the right side of the top of the workbench, and the levelness sensor is a dual-axis tilt sensor.
[0012] Preferably, both the X-axis electric slide rail and the Y-axis electric slide rail are ball screw type electric slide rails.
[0013] Preferably, each of the four cylinders is provided with a detection sensor at its top. All four detection sensors are proximity sensors with their detection ends facing the cylinder piston rod, and are used to detect the extension and retraction state of the piston rod.
[0014] Preferably, the top of the positioning rod is fitted with an elastic buffer sleeve made of silicone material.
[0015] Working Principle: After the equipment is started, the dual-axis tilt sensor at the top of the worktable first detects the level of the table surface in real time. If there is a tilt, it is precisely corrected to level by the threaded support rods around the positioning frame. Then, four cylinders extend upwards simultaneously, driving the C-shaped lifting plate one and lifting plate two to rise, raising all the positioning pressure rods to a position higher than the surface of the worktable. The operator places the PCB board to be printed on the worktable, and completes the pre-positioning through the small holes around the PCB board and the positioning holes of the worktable. Then, the electric push rod on the support frame extends, pushing the rear cylinder to move forward. The rear cylinder drives the fixed rod to move forward simultaneously through the connecting rods at both ends, thereby driving the lifting plate two to slide on the inner wall of the lifting plate one, adjusting the rear positioning pressure rod to a suitable position to match the size of the PCB board. After it is in place, the cylinders retract downwards simultaneously, driving the lifting plate one, lifting plate two and all positioning pressure rods to descend, positioning the pressure rods... The silicone elastic buffer sleeve at the top of the rod adheres to the PCB board surface and applies stable pressure, achieving double secure fixation with the positioning holes. Simultaneously, the proximity sensor at the top of the cylinder monitors the piston rod's extension and retraction status in real time to provide feedback on whether the positioning is in place. After positioning, the ball screw-type X-axis and Y-axis electric slide rails work together, using a slider to move the printer body flexibly in the X and Y axes, printing component reference numbers, logos, version numbers, and other text symbols on the PCB board surface according to a preset path. Once one side of the PCB board has been printed, the robotic arm clamps and flips the PCB board to print the other side. After both sides are printed, the cylinder extends upward, causing the positioning pressure rod to rise and reset. The electric push rod retracts, pulling the rear cylinder and lifting plate back to their initial position. The operator then removes the printed PCB board, completing a single work cycle.
[0016] This invention provides a PCB board text printer. It has the following beneficial effects: 1. This invention utilizes the coordinated operation of the Y-axis and X-axis electric slide rails to drive the printer body to achieve flexible bidirectional movement along the X and Y axes, breaking the path limitations of traditional unidirectional movement and significantly improving printing efficiency and coverage. Simultaneously, a quadrilateral positioning frame, coupled with evenly distributed height-adjustable threaded support rods around the perimeter, is used to fix the worktable, replacing the cumbersome traditional "worktable-by-itself" design and reducing movement load. Combined with real-time detection and precise correction by dual-axis tilt sensors, the worktable is ensured to always remain horizontally stable, guaranteeing printing accuracy from a fundamental structural perspective. Furthermore, the robotic arm and grippers can flip the PCB board.
[0017] 2. This invention adopts a dual positioning structure of positioning holes and positioning rods. After the PCB board is pre-positioned through the positioning holes, four cylinders synchronously drive the positioning rods to descend and press them down. The silicone elastic buffer sleeve at the top ensures both stability and avoids damage to the board. Compared with the traditional single positioning method, the reliability is significantly improved. The electric push rod pushes the rear cylinder to move, which, together with the connecting rod and the fixing rod, drives the second lifting plate to slide on the inner wall of the first lifting plate. The position of the rear positioning rod can be flexibly adjusted. There is no need to change the special fixture, so it can be adapted to PCB boards of different sizes, greatly improving the versatility of the equipment and reducing production costs.
[0018] 3. The proximity sensor at the top of the cylinder of this invention can detect the extension and retraction status of the piston rod in real time, accurately feedback the pressing and resetting status of the positioning rod, avoid equipment failure and plate damage caused by inaccurate positioning or excessive pressing, and the linkage between the level sensor and the adjustable support rod realizes automatic correction of the level of the workbench, reducing manual intervention and ensuring the consistency of accuracy in the mass production process. The overall structural design takes into account novelty, creativity and practicality, and fully meets the needs of high-precision mass production in industrialization. Attached Figure Description
[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the X-axis electric slide rail structure of the present invention; Figure 3 This is a schematic diagram of the support rod structure of the present invention; Figure 4 This is a schematic diagram of the support frame structure of the present invention; Figure 5 for Figure 4 Enlarged view of point A.
[0020] The components include: 1. Outer shell; 2. Y-axis electric slide rail; 3. X-axis electric slide rail; 4. Printer body; 5. Positioning frame; 6. Support rod; 7. Worktable; 8. Level sensor; 9. Support frame; 10. Cylinder; 11. Lifting plate one; 12. Lifting plate two; 13. Positioning pressure rod; 14. Fixing rod; 15. Connecting rod; 16. Electric push rod; 17. Detection sensor; 18. Positioning hole; 19. Robotic arm. Detailed Implementation
[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] Example: Please see the appendix Figure 1 -Appendix Figure 5 This invention provides a PCB text printer, including a housing 1. Y-axis electric slide rails 2 are fixedly connected to the left and right sides of the inner wall of the housing 1. Each Y-axis electric slide rail 2 has an X-axis electric slide rail 3 connected to a slider at its closest end. The front end of the X-axis electric slide rail 3 is connected to the printer body 4 via a slider. A quadrilateral positioning frame 5 is fixedly connected to the middle of the inner wall of the housing 1. The top of the positioning frame 5 is connected to a worktable 7 via multiple evenly distributed, height-adjustable support rods 6. The top of the worktable 7 has a positioning hole 18, and a positioning hole 18 is provided below the worktable 7. Multiple cylinders 10 are evenly arranged around the perimeter of the positioning frame 5. The top of each cylinder 10 is connected to a C-shaped lifting plate 11 and a second lifting plate 12 that is slidably connected to the inner wall of the first lifting plate 11. The tops of both the first lifting plate 11 and the second lifting plate 12 are fixedly connected to positioning rods 13. The positioning rods 13 slide through the worktable 7 and extend above it. The left and right ends of the rear cylinder 10 are connected to the second lifting plate 12 through connecting rods 15 and fixing rods 14. A support frame 9 is fixedly connected to the inner wall of the positioning frame 5. A robotic arm 19 is fixedly connected to the top left of the fixed frame on the bottom side of the inner wall of the outer shell 1. Specifically, the outer shell 1 is made of Q235 sheet metal and bent into one piece. The inner wall has reserved slide rail mounting grooves on both sides to ensure the connection is stable. The positioning frame 5 is made of aluminum alloy square tube welded together. The four corners are reinforced by corner brackets. The top is evenly distributed with support rods 6 to adapt to the support requirements of different sized worktables 7. The worktable 7 is made of aluminum alloy plate and the surface is anodized. The positioning pressure rod 13 has a guide hole at the position where it passes through the worktable 7. The inner wall of the guide hole is inlaid with a copper sleeve to reduce the frictional resistance when the positioning pressure rod 13 is raised and lowered. The lifting plate 11 and the lifting plate 2 12 are both made of cold rolled steel plate stamping. The gap between the inner wall of the lifting plate 11 and the outer wall of the lifting plate 2 12 is controlled at 0.1-0.2mm to ensure smooth sliding and no deviation. The top of the lifting plate is reserved with threaded holes. The positioning pressure rod 13 is fixed by threaded connection for easy disassembly and replacement. After one side of the PCB board is printed, the robotic arm 19 can clamp the PCB board and flip it over to print the other side of the PCB board.
[0023] The connecting rods 15 located at the left and right ends of the rear cylinder 10 are each fixedly connected to a fixing rod 14 at their top ends. The top ends of the fixing rods 14 are fixedly connected to the bottom ends of the second lifting plate 12. An electric push rod 16 is fixedly connected to the inner rear wall of the support frame 9. The front end of the electric push rod 16 is fixedly connected to the rear end of the rear cylinder 10. Multiple support rods 6 are fixedly connected to the top of the positioning frame 5. The top ends of the multiple support rods 6 are fixedly connected to the bottom end of the worktable 7. The support rods 6 are threaded adjustment rods, and their top ends are rotatably connected to the bottom end of the worktable 7 through ball joints. There are four cylinders 10, corresponding to the front, back, left, and right positions of the worktable 7, and the four cylinders 10 synchronously drive the first lifting plate 11 and the second lifting plate 12 to rise. The front, left, and right cylinders 10 are located at the bottom of the lifting plate 11, and the rear cylinder 10 is located at the bottom of the lifting plate 2 12. The top front of the worktable 7 has multiple positioning holes 18, the diameter of which is adapted to the positioning post of the PCB board. A level sensor 8 is fixedly connected to the right side of the top of the worktable 7. The level sensor 8 is a dual-axis tilt sensor. The X-axis electric slide rail 3 and the Y-axis electric slide rail 2 are both ball screw type electric slide rails. The top of each of the four cylinders 10 is equipped with a detection sensor 17. All four detection sensors 17 are proximity sensors, with the detection end facing the piston rod of the cylinder 10, used to detect the extension and retraction state of the piston rod. The top of the positioning pressure rod 13 is fitted with an elastic buffer sleeve made of silicone material. Specifically, the connecting rod 15 is made of stainless steel and is fixed to the side wall of the rear cylinder 10 and the bottom of the fixing rod 14 by welding. The fixing rod 14 has a cylindrical structure. The electric push rod 16 is fixed to the inner wall of the rear side of the support frame 9 by a bracket. The front end is connected to the rear end of the rear cylinder 10 through a fisheye connector, which can compensate for installation errors and ensure smooth thrust transmission. The ball joint of the support rod 6 is made of stainless steel and can rotate 360°, which is convenient for fine adjustment of the level of the worktable 7. The cylinder 10 is controlled by a solenoid valve to lift synchronously. The level sensor 8 has a measurement range of ±5° and an accuracy of 0.01°. It communicates with the controller through an RS485 interface to transmit level data in real time. The detection sensor 17 is fixed to the top of the cylinder 10 by a bracket. When the piston rod extends or retracts to the position, the sensor sends a signal to the controller. The silicone elastic buffer sleeve has a thickness of 3-5mm, a Shore hardness of 50-60 degrees, and anti-slip texture on the inner wall. It is fitted onto the top of the positioning pressure rod 13 by interference fit, which can enhance the fixing friction and avoid damaging the PCB board surface.
[0024] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A PCB board text printer, characterized in that, The device includes an outer casing (1), on which Y-axis electric slide rails (2) are fixedly connected to the left and right sides of the inner wall of the outer casing (1). The two Y-axis electric slide rails (2) are connected to X-axis electric slide rails (3) at their closest ends via sliders. The front end of the X-axis electric slide rails (3) is connected to the printer body (4) via sliders. A quadrilateral positioning frame (5) is fixedly connected to the middle of the inner wall of the outer casing (1). The top of the positioning frame (5) is connected to the worktable (7) via multiple evenly distributed height-adjustable support rods (6). The top of the worktable (7) has a positioning hole (18). The bottom of the worktable (7) surrounds the positioning frame (5). Multiple cylinders (10) are evenly arranged. The top of each cylinder (10) is connected to a C-shaped lifting plate (11) and a lifting plate (12) that is slidably connected to the inner wall of the lifting plate (11). The tops of the lifting plate (11) and the lifting plate (12) are both fixedly connected to a positioning rod (13). The positioning rod (13) slides through the worktable (7) and extends above it. The left and right ends of the cylinder (10) on the rear side are connected to the lifting plate (12) through a stabilizing component. The inner wall of the positioning frame (5) is fixedly connected to a support frame (9). The top left side of the bottom fixed frame of the inner wall of the outer shell (1) is fixedly connected to a robotic arm (19).
2. The PCB board text printer according to claim 1, characterized in that, The stabilizing component includes connecting rods (15) located at the left and right ends of the rear cylinder (10), and each of the two connecting rods (15) is fixedly connected to a fixing rod (14) at the top end, and the top end of the fixing rod (14) is fixedly connected to the bottom end of the lifting plate (12).
3. The PCB board text printer according to claim 1, characterized in that, An electric push rod (16) is fixedly connected to the inner wall of the rear side of the support frame (9), and the front end of the electric push rod (16) is fixedly connected to the rear end of the rear cylinder (10).
4. The PCB board text printer according to claim 1, characterized in that, The top of the positioning frame (5) is fixedly connected to a plurality of support rods (6), the tops of the plurality of support rods (6) are fixedly connected to the bottom of the workbench (7), the support rods (6) are threaded adjustment rods, and their tops are rotatably connected to the bottom of the workbench (7) through ball joints.
5. The PCB board text printer according to claim 1, characterized in that, The cylinder (10) is provided in four positions, corresponding to the front, back, left and right sides of the worktable (7). The four cylinders (10) drive the lifting plate one (11) and the lifting plate two (12) to rise and fall synchronously. The cylinders (10) on the front, left and right sides are located at the bottom of the lifting plate one (11), and the cylinders (10) on the rear side are located at the bottom of the lifting plate two (12).
6. The PCB board text printer according to claim 1, characterized in that, The workbench (7) has multiple positioning holes (18) on the front side of its top end. The diameter of the positioning holes (18) is adapted to the positioning posts of the PCB board.
7. The PCB board text printer according to claim 1, characterized in that, A level sensor (8) is fixedly connected to the right side of the top of the workbench (7). The level sensor (8) is a dual-axis tilt sensor.
8. The PCB board text printer according to claim 1, characterized in that, The X-axis electric slide rail (3) and the Y-axis electric slide rail (2) are both ball screw type electric slide rails.
9. The PCB board text printer according to claim 1, characterized in that, Each of the four cylinders (10) is equipped with a detection sensor (17) at its top. All four detection sensors (17) are proximity sensors with their detection ends facing the piston rod of the cylinder (10) and are used to detect the extension and retraction state of the piston rod.
10. The PCB board text printer according to claim 1, characterized in that, The top of the positioning pressure rod (13) is fitted with an elastic buffer sleeve made of silicone material.