Printed circuit board cleaning equipment and systems

Abstract

The present application provides a printed circuit board cleaning device and system. The above-mentioned printed circuit board cleaning device includes a contact cleaning machine and a plasma cleaning machine; the plasma cleaning machine includes a plasma machine case, a plasma cleaner and a transmission assembly; the transmission assembly includes a transmission member, a fixed plate and a connecting rod, and the transmission member includes a printed circuit board conveyor belt, a driving wheel, a driven wheel and a transmission motor; the output shaft of the transmission motor is connected to the central axis of the driving wheel, the driven wheel is movably connected to the plasma machine case, and the printed circuit board conveyor belt is respectively sleeved on the driving wheel and the driven wheel. By arranging a plasma cleaning machine after the contact cleaning machine, the printed circuit board conveyor belt conveys the printed circuit board, so that the plasma cleaner performs secondary cleaning on the printed circuit board, so that the particles with smaller particle size on the printed circuit board are removed, thereby improving the cleanliness of the printed circuit board.

Description

Technical Field

[0001] The invention relates to the technical field of circuit boards, and in particular to a printed circuit board cleaning device and system. Background Art

[0002] With the development of electronic technology, various electronic devices and chips are integrated, which greatly reduces the size of various electronic devices and realizes the requirements of portability of electronic devices. Among them, the application of PCB (Printed Circuit Board) is particularly prominent. Its integration of electronic circuits reduces the circuit space required for various electronic devices.

[0003] Among them, the cleanliness of the PCB surface is the guarantee for the use of the circuit on it, that is, the fewer particles on the PCB, the better the short circuit, shielding and other performance of the circuit, thereby improving the product quality of the PCB. The traditional cleaning equipment is a roller washing cleaning machine to clean the particles on the PCB board.

[0004] However, due to the characteristics of its structure, the traditional drum cleaning machine can only clean particles with larger particle sizes, but cannot clean particles with smaller particle sizes, resulting in low overall cleanliness of the PCB board. Summary of the invention

[0005] The object of the present invention is to overcome the deficiencies in the prior art and to provide a printed circuit board cleaning device and system for improving the surface cleanliness of the printed circuit board.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A printed circuit board cleaning device, comprising: a contact cleaning machine and a plasma cleaning machine; the contact cleaning machine comprises a cleaning bracket, a cleaning conveyor belt and a cleaning shaft, the cleaning conveyor belt is connected to the cleaning bracket, the cleaning shaft is located on a side of the cleaning conveyor belt away from the cleaning bracket, and the axial direction of the cleaning shaft is parallel to the conveying surface of the cleaning conveyor belt; the plasma cleaning machine comprises a plasma chassis, a plasma cleaner and a conveying assembly, the plasma cleaner and the conveying assembly are both located in the plasma chassis, the plasma chassis is provided with a relatively arranged feed hole and a discharge hole, the cleaning conveyor belt is arranged adjacent to the plasma chassis, and the cleaning conveyor belt is also arranged corresponding to the feed hole; the conveying assembly comprises a transmission member, a fixing plate and a connecting rod, the transmission member includes a The invention comprises a printed circuit board conveyor belt, a driving wheel, a driven wheel and a transmission motor, wherein the fixed plate and the transmission motor are both connected to the plasma machine case, the connecting rod is arranged away from the transmission motor and connected to the plasma machine case, the plasma cleaner is slidably connected to the connecting rod, and the cleaning output end of the plasma cleaner is arranged toward the printed circuit board conveyor belt; the output shaft of the transmission motor is connected to the central axis of the driving wheel, the driven wheel is movably connected to the plasma machine case, the printed circuit board conveyor belt is respectively sleeved on the driving wheel and the driven wheel, the printed circuit board conveyor belt is used to move the printed circuit board from the starting end close to the feed hole to the terminal end close to the discharge hole, wherein the cleaning conveyor belt and the printed circuit board conveyor belt are both used to transmit printed circuit boards.

[0008] In one of the embodiments, the sliding direction of the plasma cleaner is perpendicular to the conveying direction of the printed circuit board conveyor belt.

[0009] In one embodiment, the conveying assembly also includes an adjustment plate and a guide rod, the driving wheel and the driven wheel are rotatably disposed on the adjustment plate, the guide rod is connected to the plasma chassis, the adjustment plate is provided with a guide hole, and the guide rod is inserted into the guide hole.

[0010] In one of the embodiments, the transmission assembly further includes a guide protection sleeve, which is sleeved on the guide rod and clamped in the guide hole.

[0011] In one embodiment, the axial direction of the guide rod is parallel to the axial direction of the output shaft of the transmission motor.

[0012] In one embodiment, the conveying component also includes a positioning motor and a positioning screw, the positioning motor is connected to the plasma chassis, the output shaft of the positioning motor is connected to the positioning screw, the positioning plate is provided with a screw hole, and the positioning screw is inserted into the screw hole so that the positioning screw is screwed to the positioning plate.

[0013] In one of the embodiments, the transmission component further includes a threaded protective sleeve, the threaded protective sleeve is sleeved with the adjusting screw, and the threaded protective sleeve is clamped in the threaded hole.

[0014] In one embodiment, the conveying assembly also includes a plurality of auxiliary wheels, and the plurality of auxiliary wheels are all connected to the positioning plate, and the plurality of auxiliary wheels and the driving wheel and the driven wheel are all located on the same side of the positioning plate, and the printed circuit board conveyor belt is respectively mounted on the plurality of auxiliary wheels.

[0015] In one of the embodiments, the adjustment plate is provided with an adjustment strip hole, wherein a central axis of the auxiliary rotating wheel is passed through the adjustment strip hole and is interference-connected with the adjustment plate.

[0016] A printed circuit board cleaning system comprises: the printed circuit board cleaning device described in any of the above embodiments, and also comprises an electrostatic detection machine, the electrostatic detection machine comprises an electrostatic chassis and an electrostatic detection device, the electrostatic detection device is arranged in the electrostatic chassis, the electrostatic chassis is arranged adjacent to the plasma chassis, and the input hole of the electrostatic chassis corresponds to the discharge hole.

[0017] Compared with the prior art, the present invention has at least the following advantages:

[0018] By arranging a plasma cleaning machine after the contact cleaning machine, the printed circuit board is conveyed on the printed circuit board conveyor belt, and the output end of the plasma cleaner faces the printed circuit board. In this way, after the printed circuit board is cleaned by the contact cleaning machine, it moves to the plasma cleaner driven by the printed circuit board conveyor belt, so that the plasma cleaner performs secondary cleaning on the printed circuit board. Moreover, the plasma cleaner has relative movement with respect to the printed circuit board conveyor belt, so as to achieve comprehensive cleaning of various areas of the printed circuit board, so that particles with smaller particle sizes on the printed circuit board are removed, thereby improving the cleanliness of the printed circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 is a schematic diagram of a printed circuit board cleaning device in one embodiment;

[0021] Figure 2 for Figure 1 The schematic diagram of the structure of the plasma cleaning machine shown;

[0022] Figure 3 for Figure 2 An enlarged schematic diagram of a plasma cleaning machine at position A1 is shown;

[0023] Figure 4 for Figure 2 A schematic structural diagram of a printed circuit board paddle assembly of a plasma cleaning machine shown;

[0024] Figure 5 for Figure 4 An enlarged schematic diagram of the printed circuit board paddle assembly at position A2 is shown;

[0025] Figure 6 for Figure 4 A schematic diagram of another perspective of the printed circuit board paddle assembly shown;

[0026] Figure 7 for Figure 6 An enlarged schematic diagram of A3 of the printed circuit board paddle assembly is shown. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] The present invention relates to a printed circuit board cleaning device. In one embodiment, the printed circuit board cleaning device includes a contact cleaning machine and a plasma cleaning machine. The contact cleaning machine includes a cleaning bracket, a cleaning conveyor belt and a cleaning shaft. The cleaning conveyor belt is connected to the cleaning bracket. The cleaning shaft is located on the side of the cleaning conveyor belt away from the cleaning bracket, and the axial direction of the cleaning shaft is parallel to the conveying surface of the cleaning conveyor belt. The plasma cleaning machine includes a plasma machine case, a plasma cleaner and a conveying assembly. The plasma cleaner and the conveying assembly are both located in the plasma machine case. The plasma machine case is provided with a feed hole and a discharge hole that are arranged oppositely. The cleaning conveyor belt is arranged adjacent to the plasma machine case, and the cleaning conveyor belt is also arranged corresponding to the feed hole. The conveying assembly includes a transmission member, a fixed plate and a connecting rod. The transmission member includes a printed circuit board conveyor belt, a driving wheel, a driven wheel and a transmission motor. The fixed plate and the transmission motor are both connected to the plasma machine case. The connecting rod is arranged away from the transmission motor, and the connecting rod is also connected to the plasma machine case. The plasma cleaner is slidably connected to the connecting rod, and the cleaning output end of the plasma cleaner is arranged toward the printed circuit board conveyor belt. The output shaft of the transmission motor is connected to the central axis of the driving wheel. The driven wheel is movably connected to the plasma machine case. The printed circuit board conveyor belt is respectively sleeved on the driving wheel and the driven wheel, and the printed circuit board conveyor belt is used to move the printed circuit board from the starting end close to the feeding hole to the terminal end close to the discharging hole. Among them, the cleaning conveyor belt and the printed circuit board conveyor belt are both used to transport printed circuit boards. By arranging a plasma cleaning machine after the contact cleaning machine, the printed circuit board is conveyed on the printed circuit board conveyor belt, and the output end of the plasma cleaner faces the printed circuit board. In this way, after the printed circuit board is cleaned by the contact cleaning machine, it moves to the plasma cleaner driven by the printed circuit board conveyor belt, so that the plasma cleaner performs secondary cleaning on the printed circuit board. Moreover, the plasma cleaner has relative movement with respect to the printed circuit board conveyor belt, so as to achieve comprehensive cleaning of various areas of the printed circuit board, so that particles with smaller particle sizes on the printed circuit board are removed, thereby improving the cleanliness of the printed circuit board.

[0031] See also Figure 1, which is a schematic structural diagram of a printed circuit board cleaning device according to an embodiment of the present invention.

[0032] A printed circuit board cleaning device 10 of an embodiment includes a contact cleaning machine 100 and a plasma cleaning machine 200. The contact cleaning machine includes a cleaning support, a cleaning conveyor belt, and a cleaning shaft. The cleaning conveyor belt is connected to the cleaning support. The cleaning shaft is located on a side of the cleaning conveyor belt away from the cleaning support, and the axial direction of the cleaning shaft is parallel to the conveying surface of the cleaning conveyor belt. Please refer to Figure 2 and Figure 3 The plasma cleaning machine 200 includes a plasma box 210, a plasma cleaner 220 and a transmission assembly 230. The plasma cleaner 220 and the transmission assembly 230 are both located in the plasma box 210. The plasma box 210 is provided with a feed hole and a discharge hole that are arranged opposite to each other. The cleaning conveyor belt is arranged adjacent to the plasma box 210, and the cleaning conveyor belt also corresponds to the feed hole. The transmission assembly 230 includes a transmission member 232, a fixed plate 234 and a connecting rod 236. The transmission member 232 includes a printed circuit board conveyor belt 2322, a driving wheel 2324, a driven wheel 2326 and a transmission motor 2328. The fixed plate 234 and the transmission motor 2328 are both connected to the plasma box 210. The connecting rod 236 is arranged away from the transmission motor 2328, and the connecting rod 236 is also connected to the plasma box 210. The plasma cleaner 220 is slidably connected to the connecting rod 236, and the cleaning output end of the plasma cleaner 220 is arranged toward the printed circuit board conveyor belt 2322. The output shaft of the transmission motor 2328 is connected to the central axis of the driving wheel 2324. The driven wheel 2326 is movably connected to the plasma chassis 210. The printed circuit board conveyor belt 2322 is respectively sleeved on the driving wheel 2324 and the driven wheel 2326, and the printed circuit board conveyor belt 2322 is used to move the printed circuit board from the starting end close to the feeding hole to the terminal end close to the discharging hole. Among them, the cleaning conveyor belt and the printed circuit board conveyor belt 2322 are both used to transport printed circuit boards.

[0033] In this embodiment, the cleaning output end of the plasma cleaner 200 is arranged toward the printed circuit board located on the printed circuit board conveyor belt 2322, that is, when the printed circuit board conveyor belt 2322 transmits the printed circuit board, the printed circuit board is located between the printed circuit board conveyor belt 2322 and the plasma cleaner 200. By arranging the plasma cleaner 200 after the contact cleaning machine 100, the printed circuit board is transmitted on the printed circuit board conveyor belt 2322, and the output end of the plasma cleaner 220 is arranged toward the printed circuit board, so that after the printed circuit board is cleaned by the contact cleaning machine 100, it moves to the plasma cleaner 220 driven by the printed circuit board conveyor belt 2322, so that the plasma cleaner 220 performs secondary cleaning on the printed circuit board, and the plasma cleaner 220 has relative movement relative to the printed circuit board conveyor belt 2322, so as to achieve comprehensive cleaning of various areas of the printed circuit board, so that particles with smaller particle sizes on the printed circuit board are removed, thereby improving the cleanliness of the printed circuit board. In one embodiment, the fixing plate 234 is used to fix the transmission motor 2328, and the contact cleaning machine 100 includes a roller cleaning machine.

[0034] In one of the embodiments, please also refer to Figure 2 and Figure 3 , the sliding direction of the plasma cleaner 220 is perpendicular to the transmission direction of the printed circuit board conveyor belt 2322. In this embodiment, since the plasma cleaner 220 is connected to the connecting rod 236 and the plasma cleaner 220 slides on the connecting rod 236, the plasma cleaner 220 moves along the extension direction of the connecting rod 236. The transmission direction of the printed circuit board conveyor belt 2322 is set to be perpendicular to the sliding direction of the plasma cleaner 220, so that when the printed circuit board is conveyed on the printed circuit board conveyor belt 2322, the plasma cleaner 220 comprehensively cleans the printed circuit board by reciprocating motion, that is, the output end of the plasma cleaner 220 reciprocates between the two sides of the printed circuit board, so that each area on the printed circuit board is swept by the plasma cleaner 220, which increases the cleaning area of ​​the printed circuit board, thereby improving the cleanliness of the printed circuit board.

[0035] In one of the embodiments, please also refer to Figure 2 and Figure 3The transmission assembly 230 further includes a positioning plate 238 and a guide rod 231. The driving wheel 2324 and the driven wheel 2326 are both rotatably disposed on the positioning plate 238. The guide rod 231 is connected to the plasma chassis 210. The positioning plate 238 is provided with a guide hole 2382, and the guide rod 231 is inserted into the guide hole 2382. In this embodiment, the positioning plate 238 moves relative to the fixed plate 234 and the transmission motor 2328, that is, the distance between the positioning plate 238 and the fixed plate 234 and the transmission motor 2328 is adjustable. The guide rod 231 is inserted into the guide hole 2382 on the positioning plate 238, so that the positioning plate 238 moves along the guide rod 231, thereby making the position of the positioning plate 238 adjustable. In this way, when the driving wheel 2324 and the driven wheel 2326 are arranged on the adjusting plate 238, the position of the conveyor belt is changed by adjusting the position of the adjusting plate 238, so that the printed circuit boards fed into the feed hole at different positions can be transmitted, that is, when the positions of the printed circuit boards entering the feed hole are different, the position of the adjusting plate 238 is adjusted so that the printed circuit boards can all reach the printed circuit board conveyor belt 2322.

[0036] In one embodiment, see Figure 3 The transmission assembly 230 further includes a guide protection sleeve 233, which is sleeved on the guide rod 231 and is clamped in the guide hole 2382. In this embodiment, the guide rod 231 is located in the guide hole 2382, and the guide protection sleeve 233 is sleeved on the guide rod 231, so that the guide rod 231 moves in the guide protection sleeve 233, and the guide protection sleeve 233 separates the guide rod 231 from the adjustment plate 238, thereby protecting the guide rod 231 and the adjustment plate 238, reducing the replacement and maintenance probability caused by long-term wear between the two, thereby increasing the service life of the guide rod 231 and the adjustment plate 238. In one embodiment, the axial direction of the guide rod 231 is parallel to the axial direction of the output shaft of the transmission motor 2328, so that the moving direction of the adjustment plate 238 is the same as the axial direction of the guide rod 231 and is perpendicular to the transmission direction of the printed circuit board conveyor belt 2322, thereby facilitating the movement of the printed circuit board onto the printed circuit board conveyor belt 2322.

[0037] Please also refer to Figure 2 and Figure 3The transmission component 230 also includes a positioning motor 235 and a positioning screw 237. The positioning motor 235 is connected to the plasma box 210. The output shaft of the positioning motor 235 is connected to the positioning screw 237. The positioning plate 238 is provided with a screw hole 2384. The positioning screw 237 is inserted into the screw hole 2384 so that the positioning screw 237 is screwed to the positioning plate 238. In this embodiment, in order to facilitate the position adjustment of the positioning plate 238, the positioning motor 235 is provided to drive the positioning screw 237 to rotate, and the positioning screw 237 is inserted into the screw hole 2384, so that the external thread structure of the positioning screw 237 is engaged with the internal thread structure of the screw hole 2384, so that when the positioning screw 237 rotates, the positioning plate 238 is pushed to move, that is, the positioning plate 238 moves along the axial direction of the positioning screw 237. In this way, the position adjustment of the positioning plate 238 can be achieved by simply controlling the positive and negative rotation directions of the output shaft of the positioning motor 235. For example, when the output shaft of the positioning motor 235 rotates in the positive direction, the positioning plate 238 moves in a direction away from the positioning motor 235; for another example, when the output shaft of the positioning motor 235 rotates in the reverse direction, the positioning plate 238 moves in a direction close to the positioning motor 235.

[0038] Further, see Figure 3 The transmission assembly 230 further includes a threaded protective sleeve 239, which is sleeved with the positioning screw 237 and is clamped in the threaded hole 2384. In this embodiment, since the surface of the positioning screw 237 is a threaded structure, it is easy to rub against the positioning plate 238 during its rotation, thereby causing wear of the positioning screw 237 and the positioning plate 238. In order to facilitate the protection of the adjusting screw 237, the threaded protection sleeve 239 is sleeved on the adjusting screw 237, and the threaded protection sleeve 239 is clamped in the threaded hole 2384, so that the adjusting screw 237 is separated from the adjusting plate 238, thereby reducing the contact area between the adjusting screw 237 and the adjusting plate 238, thereby reducing the probability of wear between the adjusting screw 237 and the adjusting plate 238 and improving the service life of the adjusting screw 237.

[0039] Further, see Figure 3The transmission assembly 230 further includes a plurality of auxiliary wheels 240, which are all connected to the adjustment plate 238, and the plurality of auxiliary wheels 240, the driving wheel 2324 and the driven wheel 2326 are all located on the same side of the adjustment plate 238, and the printed circuit board conveyor belt 2322 is respectively sleeved on the plurality of auxiliary wheels 240. In this embodiment, since the printed circuit board conveyor belt 2322 is often in contact with the printed circuit board and transmits the printed circuit board, the printed circuit board conveyor belt 2322 is worn out and needs to be replaced regularly to ensure that the printed circuit board conveyor belt 2322 can be normally transmitted. However, when the length of the replaced printed circuit board conveyor belt 2322 is longer, in order not to affect the cleaning efficiency of the printed circuit board, the longer printed circuit board conveyor belt 2322 is sleeved on the auxiliary wheels 240, and the number of the auxiliary wheels 240 sleeved is adjusted according to the length of the printed circuit board conveyor belt 2322. In this way, the setting of the auxiliary rotating wheel 240 increases the moving path of the printed circuit board conveyor belt 2322, which is suitable for the transmission of printed circuit board conveyor belts 2322 with longer lengths, so that the printed circuit board cleaning device is suitable for printed circuit board conveyor belts 2322 of different lengths, thereby improving the adaptability of the printed circuit board cleaning device.

[0040] For further information, see Figure 3 The adjustment plate 238 is provided with an adjustment bar hole 2386, wherein the central axis of one of the auxiliary rotating wheels 240 is passed through the adjustment bar hole 2386 and is connected with the adjustment plate 238 by interference. In this embodiment, the adjustment bar hole 2386 has a rectangular space, which is convenient for the auxiliary rotating wheel to move in the adjustment bar hole 2386. The auxiliary rotating wheel 240 with the central axis passed through the adjustment bar hole 2386 slides on the adjustment plate 238, so that the spacing between it and the driving wheel 2324, the driven wheel 2326 and other auxiliary rotating wheels 240 changes, and is connected with the adjustment plate 238 by interference, so that the auxiliary rotating wheel 240 with the central axis passed through the adjustment bar hole 2386 is fixed after adjusting the position on the adjustment plate 238, and is further suitable for printed circuit board conveyor belts 2322 of different lengths.

[0041] It can be understood that when the printed circuit board is transferred to the printed circuit board conveyor belt 2322, that is, the printed circuit board moves from the cleaning conveyor belt of the contact cleaning machine 100 to the printed circuit board conveyor belt 2322 of the plasma cleaning machine 200, since the two conveyor belts belong to different parts in the machine, there is a height inconsistency. For example, the height of the cleaning conveyor belt from the ground is greater than the height of the printed circuit board conveyor belt 2322 from the ground, so that during the transmission of the printed circuit boards, the printed circuit boards are overlapped and placed, that is, at least two printed circuit boards are stacked on each other, that is, some printed circuit boards are raised relative to the printed circuit board conveyor belt 2322. In this way, some printed circuit boards have four corners of the partial cleaning area, thereby reducing the cleaning area of ​​the printed circuit board, and further reducing the cleanliness of the printed circuit board.

[0042] In order to ensure that each printed circuit board lies flat on the printed circuit board conveyor belt 2322, please refer to Figures 2 to 4The plasma cleaning machine 200 further includes a printed circuit board paddle assembly 250, which includes a first rotating plate 252, a second rotating plate 254, a support rod 256, a rotating rod 258 and an elastic connecting member 251, wherein the support rod 256 is connected to the fixed plate 234, and the support rod 256 is also connected to the rotating rod 258, and the rotating rod 258 is located between the printed circuit board conveyor belt 2322 and the plasma cleaner 220; the first rotating plate 252 and the second rotating plate 254 are inclinedly arranged, and the first rotating plate 252 and the second rotating plate 254 are both rotatably connected to the rotating rod 258, and the elastic connecting member 251 is respectively connected to the first rotating plate 252 and the second rotating plate 254. In this embodiment, the support rod 256 and the rotating rod 258 extend the first rotating plate 252 and the second rotating plate 254 to the corresponding position of the transmission path of the printed circuit board, and the first rotating plate 252 and the second rotating plate 254 rotate with the rotating rod 258 as the central axis, and the elastic connecting member 251 connects the first rotating plate 252 and the second rotating plate 254 respectively, and under its own elastic action, elastically squeezes the first rotating plate 252 and the second rotating plate 254. When the two stacked printed circuit boards are transmitted to the printed circuit board conveyor belt 2322, the first rotating plate 252 contacts the edge of the protruding printed circuit board, and under the transmission of the printed circuit board conveyor belt 2322, the protruding printed circuit board squeezes the first rotating plate 252, so that the first rotating plate 252 rotates, so that the first rotating plate 252 squeezes the elastic connecting member 251, and then the second rotating plate 254 is transmitted toward the printed circuit board conveyor belt 2322. In this way, the first rotating plate 252 reduces the transmission speed of the raised printed circuit board, so that the printed circuit board is separated from other printed circuit boards, and the second rotating plate 254 rotates to the raised printed circuit board, and through contact with the raised printed circuit board, the raised printed circuit board moves toward the printed circuit board conveyor belt 2322, thereby increasing the speed at which the raised printed circuit board is placed flat on the printed circuit board conveyor belt 2322, and facilitating the leveling of each printed circuit board. Moreover, in this embodiment, the weight of the first rotating plate 252 is greater than the weight of the second rotating plate 254. After the raised printed circuit board is leveled, the elastic force of the elastic connector 251 is released. Under the action of the gravity of the first rotating plate 252, the first rotating plate 252 returns to a position vertically facing the printed circuit board conveyor belt 2322, facilitating the leveling of the next raised printed circuit board, and ensuring that each printed circuit board remains flat on the printed circuit board conveyor belt 2322.

[0043] In order to facilitate the adjustment of the angle between the first rotating plate 252 and the second rotating plate 254, please refer to Figures 5 to 7The printed circuit board shift plate assembly 250 also includes a first positioning plate 253, a second positioning plate 255, a first positioning pin 257 and a second positioning pin 259. The first positioning plate 253 is connected to the first rotating plate 252, and the second positioning plate 255 is connected to the second rotating plate 254. The first positioning plate 253 is provided with a first rotating hole 2532 and a first positioning hole 2534 that are interconnected. The second positioning plate 255 is provided with a second rotating hole 2552 and a second positioning hole 2554 that are interconnected. The elastic connecting member 251 is respectively penetrated into the first rotating hole 2532 and the second rotating hole 2552. The first positioning pin 257 is penetrated into the first positioning hole 2534 and connected to the elastic connecting member 251. The second positioning pin 259 is penetrated into the second positioning hole 2554 and connected to the elastic connecting member 251. In this embodiment, the elastic connector 251 is an arc-shaped elastic plate, the arc-shaped elastic plate has an arc-shaped structure, and the center of the arc-shaped structure of the arc-shaped elastic plate coincides with the central axis of the rotating rod 258. The elastic connector 251 moves in the first rotating hole 2532 and the second rotating hole 2552 respectively, the first positioning pin 257 passes through the first positioning hole 2534 and is connected to the elastic connector 251, so that the first positioning plate 253 is stably connected to the elastic connector 251, so that the position between the first positioning plate 253 and the elastic connector 251 is determined, and the second positioning pin 259 passes through the second positioning hole 2554 and is connected to the elastic connector 251, so that the second positioning plate 255 is stably connected to the elastic connector 251, so that the position between the second positioning plate 255 and the elastic connector 251 is determined. In this way, by rotating at least one of the first positioning plate 253 and the second positioning plate 255, and then inserting the first positioning pin 257 and the second positioning pin 259 into the corresponding positioning holes, it is convenient to adjust the angle between the first positioning plate 253 and the second positioning plate 255, and then it is convenient to adjust the distance that the second positioning plate 255 squeezes the protruding printed circuit board to drop according to the thickness of the printed circuit board, thereby reducing the probability of the second positioning plate 255 squeezing the protruding printed circuit board to damage it.

[0044] For other embodiments, please refer to Figure 6 and Figure 7The elastic connector 251 is provided with a plurality of evenly distributed through holes 2512, the first positioning pin 257 is respectively inserted into the first positioning hole 2534 and one of the through holes 2512, and the second positioning pin 259 is respectively inserted into the second positioning hole 2554 and one of the through holes 2512. In this way, a portion of the first positioning pin 257 is located in one of the through holes 2512, which improves the connection stability between the elastic connector 251 and the first positioning plate 253, thereby improving the connection stability between the elastic connector 251 and the first rotating plate 252, and a portion of the second positioning pin 259 is located in one of the through holes 2512, which improves the connection stability between the elastic connector 251 and the second positioning plate 255, thereby improving the connection stability between the elastic connector 251 and the second rotating plate 254.

[0045] In the above embodiments, the plasma cleaner is used to generate plasma and apply the plasma to the substrate surface of the printed circuit board, wherein the high-energy particles in the plasma bombard the substrate surface of the printed circuit board, so that the substrate surface foreign matter remaining on the surface of the printed circuit board is removed, the substrate surface of the printed circuit board is cleaned, and the surface cleanliness of the printed circuit board is improved. When the high-energy particles bombard the substrate surface of the printed circuit board, high-energy atoms, molecules or atomic groups (functional groups) are attached to the substrate surface of the printed circuit board, that is, polar group molecules are attached to the substrate surface of the printed circuit board, that is, atoms or molecules with greater affinity for water are attached to the substrate surface of the printed circuit board, which not only has a cleaning effect, but also enhances the hydrophilicity of the substrate surface of the printed circuit board.

[0046] Moreover, when high-energy particles in the plasma bombard the substrate surface of the printed circuit board, the substrate surface of the printed circuit board is plasma etched, that is, the substrate surface of the printed circuit board is etched at the nanoscale, so that nanoscale etched through holes or grooves appear on the substrate surface of the printed circuit board, thereby increasing the roughness of the substrate surface of the printed circuit board and improving the performance of the substrate surface of the printed circuit board in dissolving the surface tension of the liquid.

[0047] In addition, since the plasma contains a large number of positive ions and negative ions, when the plasma acts on the substrate surface of the printed circuit board, it neutralizes the electrostatic charge on the substrate surface of the printed circuit board, thereby reducing the amount of electrostatic charge on the substrate surface of the printed circuit board, reducing the electrostatic field on the substrate surface of the printed circuit board, and reducing the electrostatic effect on the substrate surface of the printed circuit board.

[0048] Finally, the plasma flow output by the plasma cleaner is formed by high-pressure air ionization, for example, by an RF (Radio Frequency) ion source device to generate a high-pressure plasma flow, so that the plasma flow has a high-speed characteristic, which is convenient for removing dust on the surface of the substrate of the printed circuit board.

[0049] The present application also provides a printed circuit board cleaning system, comprising: the printed circuit board cleaning device described in any of the above embodiments, and further comprising an electrostatic detection machine, the electrostatic detection machine comprising an electrostatic chassis and an electrostatic detection device, the electrostatic detection device being arranged in the electrostatic chassis, the electrostatic chassis being arranged adjacent to the plasma chassis, and the input hole of the electrostatic chassis corresponding to the discharge hole. In this embodiment, the printed circuit board cleaning device comprises a contact cleaning machine and a plasma cleaning machine. The contact cleaning machine comprises a cleaning bracket, a cleaning conveyor belt and a cleaning shaft. The cleaning conveyor belt is connected to the cleaning bracket. The cleaning shaft is located on a side of the cleaning conveyor belt away from the cleaning bracket, and the axial direction of the cleaning shaft is parallel to the conveying surface of the cleaning conveyor belt. The plasma cleaning machine comprises a plasma chassis, a plasma cleaner and a conveying assembly. The plasma cleaner and the conveying assembly are both located in the plasma chassis. The plasma chassis is provided with a feed hole and a discharge hole arranged opposite to each other. The cleaning conveyor belt is arranged adjacent to the plasma chassis, and the cleaning conveyor belt also corresponds to the feed hole. The conveying assembly includes a transmission member, a fixed plate and a connecting rod. The transmission member includes a printed circuit board conveyor belt, a driving wheel, a driven wheel and a transmission motor. The fixed plate and the transmission motor are both connected to the plasma machine case. The connecting rod is arranged away from the transmission motor, and the connecting rod is also connected to the plasma machine case. The plasma cleaner is slidably connected to the connecting rod, and the cleaning output end of the plasma cleaner is arranged toward the printed circuit board conveyor belt. The output shaft of the transmission motor is connected to the central axis of the driving wheel. The driven wheel is movably connected to the plasma machine case. The printed circuit board conveyor belt is respectively sleeved on the driving wheel and the driven wheel, and the printed circuit board conveyor belt is used to move the printed circuit board from the starting end close to the feed hole to the terminal end close to the discharge hole. Among them, the cleaning conveyor belt and the printed circuit board conveyor belt are both used to transport printed circuit boards. By arranging a plasma cleaning machine after the contact cleaning machine, the printed circuit board is conveyed on the printed circuit board conveyor belt, and the output end of the plasma cleaner faces the printed circuit board. In this way, after the printed circuit board is cleaned by the contact cleaning machine, it moves to the plasma cleaner driven by the printed circuit board conveyor belt, so that the plasma cleaner performs secondary cleaning on the printed circuit board. Moreover, the plasma cleaner has relative movement with respect to the printed circuit board conveyor belt, so as to achieve comprehensive cleaning of various areas of the printed circuit board, so that particles with smaller particle sizes on the printed circuit board are removed, thereby improving the cleanliness of the printed circuit board.

[0050] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A printed circuit board cleaning device, It is characterized in that include: A contact cleaning machine, comprising a cleaning support, a cleaning conveyor belt and a cleaning shaft, wherein the cleaning conveyor belt is connected to the cleaning support, the cleaning shaft is located on a side of the cleaning conveyor belt away from the cleaning support, and the axial direction of the cleaning shaft is parallel to the conveying surface of the cleaning conveyor belt; A plasma cleaning machine, comprising a plasma machine box, a plasma cleaner and a conveying assembly, wherein the plasma cleaner and the conveying assembly are both located in the plasma machine box, the plasma machine box is provided with a feed hole and a discharge hole which are arranged opposite to each other, the cleaning conveyor belt is arranged adjacent to the plasma machine box, and the cleaning conveyor belt is also arranged corresponding to the feed hole; The transmission assembly includes a transmission member, a fixed plate and a connecting rod, the transmission member includes a printed circuit board conveyor belt, a driving wheel, a driven wheel and a transmission motor, the fixed plate and the transmission motor are both connected to the plasma chassis, the connecting rod is arranged away from the transmission motor, and the connecting rod is also connected to the plasma chassis, the plasma cleaner is slidably connected to the connecting rod, and the cleaning output end of the plasma cleaner is arranged toward the printed circuit board conveyor belt; the output shaft of the transmission motor is connected to the central axis of the driving wheel, the driven wheel is movably connected to the plasma chassis, and the printed circuit board conveyor belt is respectively sleeved The printed circuit board conveyor belt is arranged on the driving wheel and the driven wheel, and is used to move the printed circuit board from the starting end close to the feeding hole to the terminal end close to the discharging hole, wherein the cleaning conveyor belt and the printed circuit board conveyor belt are both used to transmit the printed circuit board; the sliding direction of the plasma cleaner is perpendicular to the transmission direction of the printed circuit board conveyor belt; the transmission assembly also includes an adjustment plate and a guide rod, the driving wheel and the driven wheel are both rotatably arranged on the adjustment plate, the guide rod is connected to the plasma chassis, the adjustment plate is provided with a guide hole, and the guide rod is penetrated into the guide hole.

2. The printed circuit board cleaning device according to claim 1, It is characterized in that The transmission component also includes a guide protection sleeve, which is sleeved on the guide rod and clamped in the guide hole.

3. The printed circuit board cleaning device according to claim 1, It is characterized in that The axial direction of the guide rod is parallel to the axial direction of the output shaft of the transmission motor.

4. The printed circuit board cleaning device according to claim 1, It is characterized in that The transmission component also includes a positioning motor and a positioning screw. The positioning motor is connected to the plasma chassis, and the output shaft of the positioning motor is connected to the positioning screw. The positioning plate is provided with a screw hole, and the positioning screw is inserted into the screw hole so that the positioning screw is screwed to the positioning plate.

5. The printed circuit board cleaning device according to claim 4, It is characterized in that The transmission component also includes a threaded protective sleeve, which is sleeved with the adjustment screw and is clamped in the threaded hole.

6. The printed circuit board cleaning device according to claim 1, It is characterized in that The transmission assembly also includes a plurality of auxiliary wheels, which are all connected to the adjustment plate, and are located on the same side of the adjustment plate as the driving wheel and the driven wheel. The printed circuit board conveyor belt is respectively mounted on the plurality of auxiliary wheels.

7. The printed circuit board cleaning device according to claim 6, It is characterized in that The adjustment plate is provided with an adjustment strip hole, wherein a central axis of the auxiliary rotating wheel is passed through the adjustment strip hole and is interference connected with the adjustment plate.

8. A printed circuit board cleaning system, It is characterized in that The printed circuit board cleaning device comprises the device described in any one of claims 1 to 7, and further comprises an electrostatic detection machine, wherein the electrostatic detection machine comprises an electrostatic chassis and an electrostatic detection device, wherein the electrostatic detection device is arranged in the electrostatic chassis, wherein the electrostatic chassis is arranged adjacent to the plasma chassis, and an input hole of the electrostatic chassis corresponds to the discharge hole.

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