Microdot array dispensing mechanism and dispensing device

Abstract

The application provides a micro-dot array dispensing mechanism and a dispensing device. The micro-dot array dispensing mechanism comprises a base (1) and a dispensing assembly fixed on the base. The dispensing assembly comprises a plurality of flexible dispensing needles (3). Each flexible dispensing needle comprises a needle (31), a capillary hose (32) and a luer connector (33). One end of the capillary hose is connected to the needle, and the other end of the capillary hose is connected to one end of the luer connector. The other end of the luer connector is provided with a feeding cylinder (4). The feeding cylinder is fixed on the base at intervals. The application can realize automatic identification, calibration and correction of a printing starting position, and can be used for complex three-dimensional structures and small scenes with multiple lines. The array multi-head and multiple materials can be printed at the same time, and the efficiency is significantly improved. The process is simple, the qualified rate is high, the cost is low, and the material utilization rate is high.

Description

Technical Field

[0001] This invention relates to the field of dispensing technology, and in particular to a micro-dot array dispensing mechanism and dispensing device. Background Technology

[0002] A dispensing machine, also known as an adhesive applicator, glue applicator, glue applicator, or glue dispensing machine, is an automated machine specifically designed to control fluids and apply them dropwise or in the form of glue onto the surface or interior of a product. It can achieve three-dimensional and four-dimensional path dispensing, precise positioning, accurate glue control, and prevent stringing, leakage, or dripping. Dispensing machines are mainly used in product manufacturing processes to precisely dispense, inject, coat, or drip adhesives, paints, and other liquids onto specific locations on each product. They can be used to create dots, lines, circles, or arcs.

[0003] With the continuous development of microelectronics and optical packaging technologies, the size of products and devices is getting smaller and the packaging density is getting higher. Therefore, higher demands are placed on dispensing accuracy, glue volume, efficiency, and flexibility. Existing dispensing machines have poor accuracy, large glue volume, low single-point processing efficiency, complex dispensing processes, high equipment costs, significant material waste and serious pollution, and low product qualification rates. They are not suitable for applications with small-sized substrates, high precision, small glue volume, and high efficiency.

[0004] A novel three-sided adhesive dispensing mechanism and dispensing machine, disclosed in Chinese patent literature (publication number CN210546080U), achieves three-sided adhesive dispensing functionality through a structural design comprising an adhesive dispensing mechanism, a platform, a first moving mechanism, and a second moving mechanism. This significantly reduces the space required for workpiece movement, thus adapting to the needs of miniaturized products. However, this adhesive dispensing machine only has a single dispensing head. For dispensing arrays of micro-dots, the relative position of the dispensing mechanism needs to be adjusted repeatedly, resulting in low dispensing efficiency and an inability to achieve efficient and precise dispensing of micro-dot arrays. Summary of the Invention

[0005] In view of the shortcomings of the prior art described above, the purpose of this invention is to provide a micro-dot array dispensing mechanism and dispensing device to solve the problems of poor precision, large glue volume, low single-dot processing efficiency of existing dispensing machines, which make them unsuitable for applications with small-sized substrates, high precision, small glue volume, and high efficiency.

[0006] To achieve the above and other related objectives, the present invention provides a micro-dot array dispensing mechanism, comprising a base and a dispensing assembly fixed on the base. The dispensing assembly includes a plurality of flexible dispensing needles, each flexible dispensing needle comprising a needle tip, a capillary tube, and a Luer connector. One end of the capillary tube is connected to the needle tip, and the other end is connected to one end of the Luer connector. The other end of the Luer connector is provided with a feed cylinder, which is fixedly mounted on the base at intervals.

[0007] In applications involving small-sized substrates, the spacing between multiple printing needles needs to be as small as possible. This application employs a flexible capillary tube that can be bent to a certain extent, allowing for sufficient spacing in the upper feed cylinder even with a small spacing between printing needles, without affecting the dispensing flow rate. This enables a smaller-spacing array arrangement to meet the needs of applications requiring small-sized substrates, high precision, small adhesive volume, and high efficiency. Furthermore, when using low-viscosity inks for direct writing, the resistance to ink flow within the needle channel is extremely low, requiring minimal pressure to drive extrusion. However, controlling the extrusion accuracy of ink is often difficult due to factors such as air pressure errors, gravity, equipment movement, and vibration; especially in applications requiring extremely low ink flow rates, the ink pressure can be very low or even negative. This invention utilizes the slender capillary channel of the capillary tube to increase fluid resistance, thereby increasing the fluid resistance of the flexible dispensing needle and increasing the printing fluid pressure. This reduces the interference of air pressure errors, gravity, equipment movement, and vibration on ink extrusion, improving dispensing accuracy. This method is also applicable to the dispensing of low-viscosity inks.

[0008] Preferably, the micro-dot array dispensing mechanism further includes an adjusting slide, which is used to independently adjust the position of each flexible dispensing needle in the X, Y, and Z directions. The adjusting slide of this invention is a standard component, and the aforementioned knob design facilitates independent adjustment of the position of each flexible dispensing needle, allowing them to be arranged according to small-size printing requirements.

[0009] Preferably, the adjusting slide includes an X-axis adjusting knob, a Y-axis adjusting knob, and a Z-axis adjusting knob for driving each flexible dispensing needle to move along the X, Y, and Z directions.

[0010] Preferably, the needles are close to each other and arranged in an array.

[0011] The micro-dot array dispensing mechanism of this invention arranges multiple flexible dispensing needles close to each other in an array on a base. The spacing between the multiple flexible dispensing needles can be manually adjusted, and each flexible dispensing needle can be individually controlled for output and independent feeding, thereby ensuring that multiple flexible dispensing needles and multiple materials can be printed simultaneously. It has strong compatibility and can adapt to different specifications of products and multiple materials for simultaneous printing. Each flexible dispensing needle is equipped with a high-precision manual adjustment and locking mechanism, which can independently adjust its position in the X, Y and Z directions to meet the alignment of the printing needles in the X, Y and Z directions in space, thereby realizing the simultaneous printing work of multiple printing needles to improve printing efficiency.

[0012] Preferably, the base is further provided with a plurality of feed cylinder clamping components, gathering grooves, and needle limiting grooves at intervals. Along the feeding direction, the spacing between two adjacent feed cylinder clamping components, gathering grooves, and needle limiting grooves decreases sequentially. The gathering groove is used to fix the Luer connector, the needle limiting groove is used to fix the needle, and the capillary tube is gathered and fixed between the gathering groove and the needle limiting groove. The above design allows the feed cylinders to spread out to both sides, multiple needles to converge, the volume to be more compact, and it is easy to achieve the effect of small-pitch array arrangement.

[0013] Preferably, the feed cylinder is equipped with a fluid control system, which is used to control the dispensing flow rate of each flexible dispensing needle. The fluid control system uses a high-precision pneumatic controller to individually adjust the glue flow rate of each flexible dispensing needle, thereby achieving ultra-high flow consistency and improving dispensing accuracy.

[0014] Preferably, the capillary tube is covered with a protective tube; the Luer connector is covered with a sleeve; the needle includes an inner ceramic needle and a ceramic outer sheath fitted over the outer end of the inner ceramic needle.

[0015] More preferably, the Luer connector is bonded and sealed to the capillary tube; the Luer connector is threaded and sealed to the sleeve; the protective tube is bonded and sealed to the sleeve; the capillary tube is inserted and fixed inside the conical hole of the ceramic needle, and the outer wall of the capillary tube is interference-fitted with the inner wall of the conical hole of the ceramic needle and / or bonded and fixed; the ceramic outer sheath is bonded and fixed to the precision ceramic needle; and the ceramic outer sheath is bonded and fixed to the protective tube.

[0016] Preferably, an inverted visual observation system is provided below the dispensing assembly, which is used to detect the position of each flexible dispensing needle in the X, Y and Z directions.

[0017] Preferably, the dispensing assembly is provided with a visual recognition system on its side, which is used to identify, calibrate and correct the dispensing start position; the visual recognition system is linked to a height measurement and following system, which is used to scan and record values ​​in the sample printing area, compensate for vertical deviation of the sample, and measure the dispensing thickness at the same time.

[0018] The visual recognition system is equipped with a vertically mounted zoom lens barrel, allowing for magnification switching based on sample marker size. It also features a manually adjustable Z-axis slide, which changes the lens barrel's focal length by adjusting the Z-axis. Connected to a high-resolution camera, it is used for sample marker position identification. Visual recognition can determine horizontal deviations of the sample through multi-point scanning or sample edge scanning. Combined with a rotation mechanism, it corrects the sample's horizontal orientation, ensuring consistent initial printing position. The height measurement and tracking system is equipped with a laser sensor with 0.2-micron straightness and a manually adjustable slide. The laser sensor scans and records values ​​in the sample printing area, working in conjunction with the Z-axis to compensate for vertical deviations and measure material printing thickness.

[0019] Preferably, the dispensing assembly has a tilted real-time observation system positioned diagonally above its front side. This system is used to monitor the dispensing effect and status in real time. The tilted microscope tube of the real-time observation system is equipped with manually adjustable XYZ axes. The tube is aligned with the center of the printing section, and the print head is magnified and connected to a high-resolution camera within the system for real-time monitoring of the printing effect and status. The microscope tube is also equipped with a fixing clamp to secure it to the multi-axis system. This clamp has a wide range of applicability and can accommodate various types of microscope tubes.

[0020] The present invention also provides a dispensing device including the above-described micro-dot array dispensing mechanism.

[0021] Preferably, the dispensing device further includes a frame, on which an operating platform is mounted. A fixed balance beam is mounted on the operating platform, and a driving device is mounted on the fixed balance beam to drive the micro-dot array dispensing mechanism to move up and down. The driving device is used to control the width and thickness of the dispensing dots. A multi-axis motion system is mounted on the operating platform, and a sample adsorption mechanism is mounted on the multi-axis motion system. The sample adsorption mechanism is located directly below the micro-dot array dispensing mechanism, and a rotating mechanism is mounted on the bottom surface of the sample adsorption mechanism to correct for horizontal position deviation of the sample. A dispensing needle cleaning mechanism is mounted on the side of the sample adsorption mechanism.

[0022] The sample is adsorbed using a sample adsorption mechanism. A visual observation system combined with a rotation mechanism determines the sample's origin point and corrects its position. Equipped with a high-resolution grating ruler multi-axis motion control system connected to a computer, it controls the movement of the printed sample to form the printing path. High-frequency Z-axis motion drives the sample's up-and-down movement, controlling the printing and receiving distance. The printing device features a microporous needle, which is supplied with a predetermined air pressure by a high-precision fluid control system, controlling the output of printing material. It is adaptable to multi-head arrays and simultaneous printing of various materials. The equipment includes a cleaning area, a pre-printing area, and a calibration area for cleaning the printing needle and calibrating its position.

[0023] Preferably, the dispensing needle cleaning mechanism includes a cleaning component and an angle adjustment mechanism located below the cleaning component. The cleaning component includes a calibration area, a pre-printing area, a needle soaking area, and a waste collection area arranged sequentially. A dispensing needle height calibration sensor is provided on the side of the calibration area. The cleaning component is connected to a wiping mechanism. The needle soaking area can be filled with cleaning fluid for cleaning the flexible dispensing needle after printing for a period of time, or for soaking the printed part when printing is stopped, to prevent the internal material of the needle from solidifying and clogging the needle. The waste collection area collects waste in a timely manner to avoid contamination of the equipment by waste during printing. The calibration area and the dispensing needle height calibration sensor are used to calibrate the starting height position of the flexible dispensing needle. The pre-printing area holds a small sample plate for pre-printing before printing samples to judge printing characteristics and effects. The liquid soaking area, calibration area, and pre-printed sample are all easy to disassemble and replace, and are equipped with angle and lifting adjustment mechanisms to ensure that they are perpendicular to the print head after installation, and can be used for pre-printed products of various thicknesses.

[0024] Preferably, the wiping mechanism includes a dripping device and a lint-free cloth roll. The lint-free cloth roll is equipped with a winding mechanism. The lint-free cloth roll includes a roller and a lint-free cloth wound on the roller. The lint-free cloth is used to wipe the flexible dispensing needle. The printhead cleaning is a roll-type clamping wiping mechanism. The roll is equipped with a dripping device to keep the lint-free cloth moist. The flow rate of the dripping can be adjusted according to the material characteristics. The winding mechanism promptly winds up the contaminated lint-free cloth to prevent repeated wiping and contamination of the flexible dispensing needle.

[0025] Preferably, the sample adsorption mechanism includes a suction cup, the upper surface of which is formed with micropores and / or V-grooves. The sample is placed on the suction cup, and through vacuum adsorption, the sample is firmly fixed and the processed surface is flat. The suction cup can be configured with ceramic, aluminum, marble, etc., and its structure includes micropores, V-grooves, etc. The suction cup can also perform zoned adsorption to accommodate samples of various sizes.

[0026] Preferably, the multi-axis motion system includes an X-axis motion mechanism, a Y-axis motion mechanism, and a Z-axis motion mechanism. The X-axis and Y-axis motion mechanisms are used to drive the sample to move horizontally to generate a printing path; the Z-axis motion mechanism is used to drive the sample to move vertically to compensate for vertical deviations of the sample and control the dispensing thickness.

[0027] As described above, the micro-dot array dispensing mechanism and dispensing device of the present invention have the following beneficial effects: multiple printing needles are close to each other and arranged in an array on a base, and their respective X, Y, and Z directions can be independently adjusted to meet the alignment of the printing needles in the x, y, and z directions in space, thereby enabling multiple printing needles to print simultaneously and improving printing efficiency; the use of flexible capillary tubes allows for arrays with smaller spacing; the long capillary channels of the capillary tubes can increase fluid resistance, thereby increasing the fluid resistance of the flexible dispensing needles, thus increasing the printing fluid pressure, and reducing the interference of air pressure error, gravity, equipment movement and vibration on ink extrusion, thereby improving dispensing accuracy; the minimum accuracy can reach 1 micrometer; the present invention can realize automatic identification, calibration and correction of the printing start position, and can be used in complex three-dimensional structures and scenarios with small multi-line shapes; simultaneous printing of multiple heads and multiple materials significantly improves efficiency; the process is simple, the pass rate is high, the cost is low, and the material utilization rate is high. Attached Figure Description

[0028] Figure 1 This is one of the structural schematic diagrams of a micro-dot array dispensing mechanism.

[0029] Figure 2 This is one of the structural schematic diagrams of a flexible dispensing needle.

[0030] Figure 3 Displayed as Figure 2 A cross-sectional view along the AA direction.

[0031] Figure 4 This is one of the assembly drawings of the dispensing device.

[0032] Figure 5 This is one of the structural schematic diagrams of the rack.

[0033] Figure 6 This is one of the structural schematic diagrams of an inverted visual observation system.

[0034] Figure 7 This is one of the structural diagrams of a visual recognition system.

[0035] Figure 8 This is one of the structural schematic diagrams of a height measurement and following system.

[0036] Figure 9 The diagram shows the assembly structure of the real-time observation system and the micro-dot array dispensing mechanism.

[0037] Figure 10 This is one of the structural schematic diagrams of a dispensing needle cleaning mechanism.

[0038] Figure 11 This is one of the structural schematic diagrams of the wiping mechanism.

[0039] Figure 12 This is one of the structural schematic diagrams of a suction cup.

[0040] Reference numerals: 1. Base; 11. Feed cylinder clamp; 12. Gathering groove; 13. Needle limiting groove; 2. Adjusting slide; 3. Flexible dispensing needle; 31. Needle; 32. Capillary tube; 33. Luer connector; 34. Protective tube; 35. Sleeve; 311. Ceramic needle; 312. Ceramic outer sheath; 4. Feed cylinder; 21. X-axis adjustment knob; 22. Y-axis adjustment knob; 23. Z-axis adjustment knob; 5. Inverted visual observation system; 51. Inverted alignment tube; 6. Visual recognition system; 61. Camera; 62. First zoom tube; 63. Precision manual slide; 64. Auxiliary light source; 65. High-resolution objective lens; 66. Height measurement and following system; 661. Laser sensor; 662. First precision Z-axis slide; 663. First fixing fixture; 7. Actual 71. Observation system; 72. Second zoom lens tube; 73. Auxiliary ring light source; 74. Precision XY-axis slide; 75. Second precision Z-axis slide; 8. Second fixing fixture; 9. Micro-dot array dispensing mechanism; 9. Frame; 91. Operating platform; 92. Fixed balance beam; 93. Drive device; 94. Multi-axis motion system; 941. X-axis motion mechanism; 942. Y-axis motion mechanism; 943. Z-axis motion mechanism; 95. Sample adsorption mechanism; 951. Suction cup; 952. Micropore; 953. Annular groove; 96. Rotation mechanism; 97. Dispensing needle cleaning mechanism; 971. Angle adjustment mechanism; 972. Calibration area; 973. Pre-printing area; 974. Needle soaking area; 975. Waste collection area; 976. Dispensing head height calibration sensor; 977. Wiping mechanism. Detailed Implementation

[0041] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0042] In the description of this application, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0043] Unless otherwise expressly specified and limited, the terms "connection," "fixed," and "set" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0044] The rotating mechanism, adjusting slide, and multi-axis motion system described in the following embodiments of this application are all connected to an industrial control system or industrial computer. This embodiment does not involve improvements to related circuits and control programs. The use of industrial control systems or industrial computers to realize positional changes of various components is based on existing technology and will not be elaborated here.

[0045] The visual image analysis involved in the inverted visual observation system, visual recognition system, height measurement and tracking system, and real-time observation system described in the following embodiments of this application is a very common technique in the field, and will not be elaborated further here.

[0046] like Figure 1 As shown, this application embodiment provides a micro-dot array dispensing mechanism, including a base 1, a dispensing assembly fixed on the base, and an adjusting slide 2. The dispensing assembly includes a plurality of flexible dispensing needles 3, such as... Figure 2 and Figure 3As shown, the flexible dispensing needle includes a needle 31, a capillary tube 32, and a Luer connector 33. A protective tube 34 is fitted over the capillary tube; a sleeve 35 is fitted over the Luer connector; the needle includes an inner ceramic needle 311 and a ceramic outer sheath 312 fitted over the outer end of the inner ceramic needle. One end of the capillary tube is connected to the needle, and the other end is connected to one end of the Luer connector. The Luer connector is bonded and sealed to the capillary tube; the Luer connector is threaded and sealed to the sleeve; the protective tube is bonded and sealed to the sleeve; the capillary tube is inserted and fixed into the conical hole of the ceramic needle, and the outer wall of the capillary tube is interference-fitted with the inner wall of the conical hole of the ceramic needle and bonded and fixed; the ceramic outer sheath is bonded and fixed to the precision ceramic needle; and the ceramic outer sheath is bonded and fixed to the protective tube. The adjusting slide is used to independently adjust the position of each flexible dispensing needle in the X, Y, and Z directions. The adjusting slide includes an X-axis adjusting knob 21, a Y-axis adjusting knob 22, and a Z-axis adjusting knob 23 for driving each flexible dispensing needle to move along the X, Y, and Z directions. The base is provided with several feed cylinder clamps 11, gathering grooves 12, and needle limiting grooves 13 spaced apart. Along the feeding direction, the spacing between adjacent feed cylinder clamps, gathering grooves, and needle limiting grooves decreases sequentially. The gathering groove is used to fix the Luer connector, and the needle limiting groove is used to fix the needle. The capillary tube is gathered and fixed between the gathering groove and the needle limiting groove. The feed cylinder is equipped with a fluid control system, which is used to control the dispensing flow rate of each flexible dispensing needle. The other end of the Luer connector is provided with a feed cylinder 4, which is fixed to the base at intervals by feed cylinder clamps. The needles are close to each other and arranged in an array.

[0047] like Figure 4As shown in the figure, this application provides a dispensing device, including a frame 9, an operating platform 91 on the frame, a fixed balance beam 92 on the operating platform, and a driving device 93 on the fixed balance beam for driving a micro-dot array dispensing mechanism to move up and down. The micro-dot array dispensing mechanism is fixed to the drive shaft of the driving device via a substrate. The driving device is used to control the width and thickness of the dispensing dots. An inverted vision observation system 5 is provided below the dispensing assembly. The inverted vision observation system is used to detect the position of each flexible dispensing needle in the X, Y, and Z directions. A vertically mounted vision recognition system 6 is provided on the side of the dispensing assembly. The vision recognition system is used to identify, calibrate, and correct the dispensing start position. The visual recognition system is linked to a height measurement and tracking system 66, which scans and records values ​​in the sample printing area to compensate for vertical deviations in the sample and simultaneously measures the dispensing thickness. A real-time observation system 7 is obliquely positioned above the front of the dispensing assembly, used to monitor the dispensing effect and status in real time. A multi-axis motion system 94 is mounted on the operating platform, with a sample adsorption mechanism 95 located directly below the micro-dot array dispensing mechanism. A rotating mechanism 96 is located on the bottom of the sample adsorption mechanism, used to correct horizontal position deviations in the sample. A dispensing needle cleaning mechanism 97 is located on the side of the sample adsorption mechanism. Figure 5 As shown, the multi-axis motion system includes an X-axis motion mechanism 941, a Y-axis motion mechanism 942, and a Z-axis motion mechanism 943. The X-axis and Y-axis motion mechanisms are used to drive the sample to move horizontally and generate a printing path. The Z-axis motion mechanism is used to drive the sample to move vertically and to compensate for vertical deviations of the sample and control the dispensing thickness.

[0048] like Figure 6 As shown, the inverted visual observation system is equipped with an inverted alignment tube 51. Before dispensing, the inverted visual observation system is moved to directly below the dispensing assembly, and the position of each flexible dispensing needle in the X, Y and Z directions is detected by the inverted alignment tube.

[0049] like Figure 7 As shown, the visual recognition system includes a camera 61, a first zoom lens barrel 62, a precision manual slide 63, an auxiliary light source 64, and a high-resolution objective lens 65. The magnification can be switched according to the size of the sample marker points, and it is equipped with a manually adjustable Z-axis slide. Adjusting the Z-axis changes the focal length of the lens barrel. It is also connected to a high-resolution camera within the system for identifying the position of sample marker points. Visual recognition can determine the horizontal deviation of the sample through multi-point scanning or sample edge scanning. Combined with a rotation mechanism, the sample is horizontally corrected to ensure consistent initial printing positions.

[0050] like Figure 8As shown, the height measurement and tracking system 66 includes a laser sensor 661, a first precision Z-axis slide 662, and a first fixing fixture 663. The height measurement and tracking system is fixed to the vision recognition system 6 via the first fixing fixture 663. The assembly structure of the real-time observation system 7 and the micro-dot array dispensing mechanism is as follows. Figure 9 As shown, the real-time observation system includes a second zoom lens tube 71, an auxiliary ring light source 72, a precision XY axis slide 73, a second precision Z axis slide 74, and a second fixing clamp 75; the real-time observation system 7 is fixed on the base 1 by the second fixing clamp 75.

[0051] like Figure 10 As shown, the dispensing needle cleaning mechanism includes a cleaning assembly and an angle adjustment mechanism 971 located below the cleaning assembly. The cleaning assembly includes a calibration area 972, a pre-printing area 973, a needle soaking area 974, and a waste collection area 975 arranged sequentially. A dispensing needle height calibration sensor 976 is provided on the side of the calibration area. The cleaning assembly is connected to a wiping mechanism 977.

[0052] like Figure 11 As shown, the wiping mechanism includes a dripping device and a cleanroom cloth roll 978. The cleanroom cloth roll is equipped with a winding mechanism. The cleanroom cloth roll includes a roller and a cleanroom cloth wound on the roller. The cleanroom cloth is used to wipe the flexible dispensing needle.

[0053] like Figure 12 As shown, the sample adsorption mechanism includes a suction cup 951, on which micropores 952 and annular grooves 953 are formed.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the method of the present invention, and these improvements and additions should also be considered within the scope of protection of the present invention. Any modifications, alterations, and equivalent changes made by those skilled in the art based on the above-disclosed technical content without departing from the spirit and scope of the present invention are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A micro-dot array dispensing mechanism, characterized in that, The system includes a base (1) and a dispensing assembly fixed on the base. The dispensing assembly includes several flexible dispensing needles (3), each flexible dispensing needle including a needle (31), a capillary tube (32), and a Luer connector (33). One end of the capillary tube is connected to the needle, and the other end is connected to one end of the Luer connector. The other end of the Luer connector is provided with a feed tube (4), which is fixed to the base at intervals. The base is also provided with several feed tube clamps (11), a collection groove (12), and a... The needle limiting groove (13) has a decreasing spacing between adjacent feed cylinder clamps, gathering grooves, and needle limiting grooves along the feeding direction; the gathering groove is used to fix the Luer connector, the needle limiting groove is used to fix the needle, and the capillary tube is gathered and fixed between the gathering groove and the needle limiting groove; the capillary tube is covered with a protective tube (34); the Luer connector is covered with a sleeve (35); the needle includes an inner ceramic needle (311) and a ceramic outer sheath (312) sleeved on the outside of the upper end of the inner ceramic needle. The flexible dispensing needles are arranged close to each other in an array on a base. The spacing between the flexible dispensing needles is adjustable. Each flexible dispensing needle has its own output control and independent material supply. The flexible dispensing needles are used for printing multiple materials simultaneously.

2. The micro-dot array dispensing mechanism according to claim 1, characterized in that: The micro-dot array dispensing mechanism also includes an adjustment slide (2), which is used to independently adjust the position of each flexible dispensing needle in the X, Y and Z directions.

3. The micro-dot array dispensing mechanism according to claim 2, characterized in that: The adjustment slide includes an X-axis adjustment knob (21), a Y-axis adjustment knob (22), and a Z-axis adjustment knob (23) for driving each flexible dispensing needle to move along the X, Y, and Z directions.

4. The micro-dot array dispensing mechanism according to claim 1, characterized in that: The feed cylinder is equipped with a fluid control system, which is used to control the dispensing flow rate of each flexible dispensing needle.

5. The micro-dot array dispensing mechanism according to claim 1, characterized in that: The Luer connector is bonded and sealed to the capillary tube; the Luer connector is threaded and sealed to the sleeve; the protective tube is bonded and sealed to the sleeve; the capillary tube is inserted and fixed inside the conical hole of the ceramic needle, and the outer wall of the capillary tube is interference-fitted with the inner wall of the conical hole of the ceramic needle and / or bonded and fixed; the ceramic outer sheath is bonded and fixed to the precision ceramic needle; the ceramic outer sheath is bonded and fixed to the protective tube.

6. The micro-dot array dispensing mechanism according to claim 1, characterized in that: An inverted visual observation system (5) is provided below the dispensing assembly. The inverted visual observation system is used to detect the position of each flexible dispensing needle in the X, Y and Z directions.

7. The micro-dot array dispensing mechanism according to claim 1, characterized in that: The dispensing assembly is provided with a visual recognition system (6) on its side. The visual recognition system is used to identify, calibrate and correct the starting position of dispensing. The visual recognition system is connected to a height measurement and following system (66). The height measurement and following system is used to scan and record values ​​in the sample printing area, compensate for vertical deviation of the sample, and measure the dispensing thickness at the same time.

8. The micro-dot array dispensing mechanism according to claim 1, characterized in that: The dispensing assembly is provided with a real-time observation system (7) at an angle above the front of the assembly. The real-time observation system is used to observe the dispensing effect and status in real time.

9. A dispensing device, characterized in that: Includes the micro-dot array dispensing mechanism as described in any one of claims 1 to 8.

10. The dispensing device according to claim 9, characterized in that: It also includes a frame (9), on which an operating platform (91) is provided. A fixed balance beam (92) is mounted on the operating platform. A driving device (93) for driving the micro-dot array dispensing mechanism to move up and down is provided on the fixed balance beam. The driving device is used to control the width and thickness of the dispensing dots. A multi-axis motion system (94) is provided on the operating platform. A sample adsorption mechanism (95) is provided on the multi-axis motion system. The sample adsorption mechanism is located directly below the micro-dot array dispensing mechanism. A rotating mechanism (96) is provided on the bottom surface of the sample adsorption mechanism. The rotating mechanism is used to correct the horizontal position deviation of the sample. A dispensing needle cleaning mechanism (97) is provided on the side of the sample adsorption mechanism.

11. The dispensing apparatus according to claim 10, characterized in that: The dispensing needle cleaning mechanism includes a cleaning component and an angle adjustment mechanism (971) located below the cleaning component. The cleaning component includes a calibration area (972), a pre-printing area (973), a needle soaking area (974), and a waste collection area (975) arranged in sequence. A dispensing head height calibration sensor (976) is provided on the side of the calibration area. The cleaning component is connected to a wiping mechanism (977).

12. The dispensing device according to claim 11, characterized in that: The wiping mechanism includes a dripping device and a cleanroom cloth roll (978). The cleanroom cloth roll is equipped with a winding mechanism. The cleanroom cloth roll includes a roller and a cleanroom cloth wound on the roller. The cleanroom cloth is used to wipe the flexible dispensing needle.

13. The dispensing device according to claim 10, characterized in that: The sample adsorption mechanism includes a suction cup (951) with micropores (952) and / or annular grooves (953) formed on it.

14. The dispensing apparatus according to claim 10, characterized in that: The multi-axis motion system includes an X-axis motion mechanism (941), a Y-axis motion mechanism (942), and a Z-axis motion mechanism (943). The X-axis and Y-axis motion mechanisms are used to drive the sample to move horizontally and generate a printing path. The Z-axis motion mechanism is used to drive the sample to move vertically and to compensate for vertical deviations of the sample and control the thickness of the adhesive dispensing.

Images