CN213001576U

CN213001576U - Printed circuit board cleaning device and system

Info

Publication number: CN213001576U
Application number: CN202022215874.2U
Authority: CN
Inventors: 白树旺; 郝卫斌; 孔德光
Original assignee: Huizhou Huayu Technology Co ltd
Current assignee: Huizhou Huayu Technology Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-04-20
Anticipated expiration: 2030-09-29

Abstract

The application provides a printed circuit board cleaning device and system. The printed circuit board cleaning equipment comprises a contact type cleaning machine and a plasma cleaning machine; the plasma cleaner comprises a plasma cabinet, a plasma cleaner and a transmission assembly; the transmission component comprises a transmission part, a fixed plate and a connecting rod, and the transmission part comprises a printed circuit board transmission belt, a driving wheel, a driven wheel and a transmission motor; the output shaft of the transmission motor is connected with the middle shaft of the driving wheel, the driven wheel is movably connected with the plasma case, and the printed circuit board conveyor belt is respectively sleeved on the driving wheel and the driven wheel. Through set up the plasma cleaner behind the contact cleaner, the conveying has printed circuit board on the printed circuit board conveyer belt for the plasma cleaner carries out the secondary to printed circuit board and cleans, thereby makes the less granule of particle size on the printed circuit board clear away, and then makes printed circuit board's cleanliness improve.

Description

Printed circuit board cleaning device and system

Technical Field

The utility model relates to a circuit board technical field especially relates to a printed circuit board cleaning device and system.

Background

With the development of electronic technology, various electronic devices and chips are integrated, so that the size of various electronic devices is greatly reduced, and the requirements of portability and the like of the electronic devices are met, wherein the application of a Printed Circuit Board (PCB) is particularly prominent, and the integration of the PCB into electronic circuits reduces the Circuit space required by the various electronic devices.

The surface finish of the PCB is guaranteed by using the circuits on the PCB, namely the fewer particles on the PCB are, the better the short circuit, shielding and other performances of the circuits are, and therefore the product quality of the PCB is improved. Traditional cleaning equipment is a rolling cleaning machine, and particle cleaning on the PCB is realized.

However, the conventional rolling cleaning machine can only clean the particles with larger particle sizes due to the characteristics of the structure of the conventional rolling cleaning machine, but cannot clean the particles with smaller particle sizes, so that the overall cleanliness of the PCB is lower.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, providing an improve printed circuit board's surface cleanliness's printed circuit board cleaning equipment and system.

The purpose of the utility model is realized through the following technical scheme:

a printed circuit board cleaning apparatus comprising: contact cleaners and plasma cleaners; the contact type cleaning machine comprises a cleaning support, a cleaning conveyor belt and a cleaning shaft, wherein the cleaning conveyor belt is connected with the cleaning support, the cleaning shaft is positioned on one surface of the cleaning conveyor belt, which is far away from the cleaning support, 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 machine box, a plasma cleaner and a conveying assembly, wherein the plasma cleaner and the conveying assembly are both positioned in the plasma machine box, the plasma machine box is provided with a feeding hole and a discharging hole which are oppositely arranged, the cleaning conveying belt is arranged close to the plasma machine box, and the cleaning conveying belt is also arranged corresponding to the feeding hole; the transmission component comprises a transmission part, a fixing plate and a connecting rod, the transmission part comprises a printed circuit board transmission belt, a driving wheel, a driven wheel and a transmission motor, the fixing plate and the transmission motor are both connected with the plasma cabinet, the connecting rod is far away from the transmission motor and is connected with the plasma cabinet, the plasma cleaner is connected with the connecting rod in a sliding manner, and the cleaning output end of the plasma cleaner faces the printed circuit board transmission belt; the output shaft of the transmission motor is connected with the center shaft of the driving wheel, the driven wheel is movably connected with the plasma cabinet, 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 for moving a printed circuit board from an initial end close to the feeding hole to a terminal end close to the discharging hole, and the cleaning conveyor belt and the printed circuit board conveyor belt are both used for conveying the printed circuit board.

In one embodiment, the sliding direction of the plasma cleaner is perpendicular to the conveying direction of the printed circuit board conveyor belt.

In one embodiment, the conveying assembly further includes a positioning plate and a guide rod, the driving wheel and the driven wheel are rotatably disposed on the positioning plate, the guide rod is connected with the plasma cabinet, the positioning plate is provided with a guide hole, and the guide rod is inserted into the guide hole.

In one embodiment, the conveying assembly further comprises a guide protection shaft sleeve, the guide protection shaft sleeve is sleeved on the guide rod, and the guide protection shaft sleeve is clamped in the guide hole.

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

In one embodiment, the conveying assembly further includes a positioning motor and a positioning screw, the positioning motor is connected to the plasma cabinet, an output shaft of the positioning motor is connected to the positioning screw, the positioning plate is provided with a threaded hole, and the positioning screw is inserted into the threaded hole so that the positioning screw is threaded with the positioning plate.

In one embodiment, the conveying assembly further comprises a bolt connection protection shaft sleeve, the bolt connection protection shaft sleeve is sleeved with the position adjusting screw rod, and the bolt connection protection shaft sleeve is clamped in the bolt connection hole.

In one embodiment, the conveying assembly further includes a plurality of auxiliary rollers, the plurality of auxiliary rollers are all connected to the positioning plate, the plurality of auxiliary rollers, the driving roller and the driven roller are all located on the same side of the positioning plate, and the printed circuit board conveying belt is respectively sleeved on the plurality of auxiliary rollers.

In one embodiment, the positioning plate is provided with a positioning bar hole, wherein a center shaft of the auxiliary rotating wheel penetrates through the positioning bar hole and is in interference connection with the positioning plate.

A printed circuit board cleaning system comprising: the printed circuit board cleaning equipment of any embodiment of the above, further include a static electricity detection machine, the static electricity detection machine includes a static electricity box and a static electricity detection device, the static electricity detection device set up in the static electricity box, the static electricity box is close to the plasma cabinet sets up, just the input hole of static electricity box with the discharge opening corresponds.

Compared with the prior art, the utility model discloses at least, following advantage has:

through set up the plasma cleaner behind the contact cleaner, the conveying has printed circuit board on the printed circuit board conveyer belt, the output of plasma cleaner is towards printed circuit board, like this, after printed circuit board passes through the cleanness of contact cleaner, move to plasma cleaner department under the drive of printed circuit board conveyer belt, make plasma cleaner carry out the secondary cleaning to printed circuit board, and, plasma cleaner has relative motion for the printed circuit board conveying, the realization is to the comprehensive cleanness in each region of printed circuit board, thereby make the granule that the particle size is less on the printed circuit board clear away, and then make the cleanliness of printed circuit board improve.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic diagram of a printed circuit board cleaning apparatus in one embodiment;

FIG. 2 is a schematic view of the plasma cleaner shown in FIG. 1;

FIG. 3 is an enlarged schematic view of the plasma cleaner of FIG. 2 at A1;

FIG. 4 is a schematic diagram of a PCB shifting block assembly of the plasma cleaner of FIG. 2;

FIG. 5 is an enlarged schematic view of the printed circuit board paddle assembly shown in FIG. 4 at A2;

FIG. 6 is a schematic view of the printed circuit board paddle assembly of FIG. 4 from another perspective;

fig. 7 is an enlarged schematic view of the printed circuit board paddle assembly shown in fig. 6 at a 3.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model relates to a printed circuit board cleaning device. In one embodiment, the printed circuit board cleaning apparatus includes a contact cleaner and a plasma cleaner. The contact cleaning machine includes a cleaning support, a cleaning conveyor belt, and a cleaning shaft. The cleaning conveyor belt is connected with the cleaning support. The cleaning shaft is located on one surface, deviating from the cleaning support, of the cleaning conveyor belt, and the axial direction of the cleaning shaft is parallel to the conveying surface of the cleaning conveyor belt. The plasma cleaner includes a plasma chassis, a plasma cleaner, and a transfer assembly. The plasma cleaner and the transfer assembly are both located within the plasma chassis. The plasma machine box is provided with a feeding hole and a discharging hole which are oppositely arranged. The cleaning conveyor belt is arranged close to the plasma cabinet and corresponds to the feeding hole. The conveying assembly comprises a transmission part, a fixing plate and a connecting rod. The transmission part comprises 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 with the plasma cabinet. The connecting rod is far away from the transmission motor, and the connecting rod is further connected with the plasma cabinet. The plasma cleaner with connecting rod sliding connection, just the clean output of plasma cleaner is towards the setting of printed circuit board conveyer belt. And an output shaft of the transmission motor is connected with a middle shaft of the driving wheel. The driven wheel is movably connected with the plasma case. The printed circuit board conveyor belt is sleeved on the driving wheel and the driven wheel respectively, and is used for moving the printed circuit board from the starting end close to the feeding hole to the terminal end close to the discharging hole. Wherein, clean conveyer belt and the printed circuit board conveyer belt all is used for transporting printed circuit board. Through set up the plasma cleaner behind the contact cleaner, the conveying has printed circuit board on the printed circuit board conveyer belt, the output of plasma cleaner is towards printed circuit board, like this, after printed circuit board passes through the cleanness of contact cleaner, move to plasma cleaner department under the drive of printed circuit board conveyer belt, make plasma cleaner carry out the secondary cleaning to printed circuit board, and, plasma cleaner has relative motion for the printed circuit board conveying, the realization is to the comprehensive cleanness in each region of printed circuit board, thereby make the granule that the particle size is less on the printed circuit board clear away, and then make the cleanliness of printed circuit board improve.

Please refer to fig. 1, which is a schematic structural diagram of a printed circuit board cleaning apparatus according to an embodiment of the present invention.

The printed circuit board cleaning apparatus 10 of an embodiment includes a contact type 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 with the cleaning support. The cleaning shaft is located on one surface, deviating from the cleaning support, of the cleaning conveyor belt, and the axial direction of the cleaning shaft is parallel to the conveying surface of the cleaning conveyor belt. Referring to fig. 2 and 3, the plasma cleaning machine 200 includes a plasma cabinet 210, a plasma cleaner 220, and a transfer assembly 230. The plasma cleaner 220 and the transfer assembly 230 are located within the plasma chassis 210. The plasma cabinet 210 is provided with a feeding hole and a discharging hole which are oppositely arranged. The cleaning conveyer is disposed adjacent to the plasma cabinet 210, and the cleaning conveyer also corresponds to the feed hole. The transfer assembly 230 includes a transmission member 232, a fixing plate 234, and a connecting rod 236. The transmission 232 includes a printed circuit board conveyor 2322, a driving pulley 2324, a driven pulley 2326 and a transmission motor 2328. The fixed plate 234 and the driving motor 2328 are both connected to the plasma chassis 210. The connecting rod 236 is disposed away from the transmission motor 2328, and the connecting rod 236 is further connected to the plasma chassis 210. The plasma cleaner 220 is slidably coupled to the connection rod 236, and a cleaning output of the plasma cleaner 220 is disposed toward the printed circuit board conveyor 2322. An output shaft of the transmission motor 2328 is connected with a central shaft 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 for moving the printed circuit board from the starting end close to the feeding hole to the terminal end close to the discharging hole. The cleaning conveyor belt and the printed circuit board conveyor belt 2322 are used for conveying printed circuit boards.

In this embodiment, the cleaning output of the plasma cleaner 200 is disposed toward the pcb located on the pcb conveyor 2322, that is, the pcb is located between the pcb conveyor 2322 and the plasma cleaner 200 when the pcb is transported by the pcb conveyor 2322. By arranging the plasma cleaner 200 behind the contact cleaner 100, the printed circuit board is conveyed on the printed circuit board conveying belt 2322, and the output end of the plasma cleaner 220 faces the printed circuit board, so that after the printed circuit board is cleaned by the contact cleaner 100, the printed circuit board is driven by the printed circuit board conveying belt 2322 to move to the plasma cleaner 220, the plasma cleaner 220 performs secondary cleaning on the printed circuit board, and the plasma cleaner 220 moves relative to the printed circuit board conveying belt 2322, so that all areas of the printed circuit board are cleaned comprehensively, particles with small particle sizes on the printed circuit board are removed, and the cleanliness of the printed circuit board is improved. In one embodiment, the fixing plate 234 is used for fixedly mounting the transmission motor 2328, and the contact cleaning machine 100 comprises a rolling cleaning machine.

In one embodiment, referring to fig. 2 and 3, the sliding direction of the plasma cleaner 220 is perpendicular to the conveying direction of the pcb conveyor 2322. In the present embodiment, since the plasma cleaner 220 is connected to the connection rod 236, and the plasma cleaner 220 slides on the connection rod 236, the plasma cleaner 220 moves along the extension direction of the connection 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 cleans the printed circuit board comprehensively in a reciprocating manner, namely, the output end of the plasma cleaner 220 reciprocates between two sides of the printed circuit board, so that each area on the printed circuit board is swept by the plasma cleaner 220, the cleaning area of the printed circuit board is increased, and the cleanliness of the printed circuit board is improved.

In one embodiment, referring to fig. 2 and fig. 3, the conveying assembly 230 further includes a positioning plate 238 and a guiding rod 231, the driving wheel 2324 and the driven wheel 2326 are both rotatably disposed on the positioning plate 238, the guiding rod 231 is connected to the plasma chassis 210, the positioning plate 238 is provided with a guiding hole 2382, and the guiding rod 231 is disposed in the guiding hole 2382 in a penetrating manner. In the present embodiment, the positioning plate 238 moves relative to the fixing plate 234 and the transmission motor 2328, that is, the distance between the positioning plate 238 and the fixing plate 234 and the transmission motor 2328 is adjustable. The guide rod 231 is inserted into the guide hole 2382 of the positioning plate 238, so that the positioning plate 238 moves along the guide rod 231, thereby adjusting the position of the positioning plate 238. In this way, in the case that the driving wheel 2324 and the driven wheel 2326 are disposed on the positioning plate 238, the position of the conveyor belt is changed by adjusting the position of the positioning plate 238, so that the printed circuit boards fed into the feeding holes at different positions are conveyed, that is, when the positions of the printed circuit boards fed into the feeding holes are different, the printed circuit boards can reach the printed circuit board conveyor belt 2322 by adjusting the position of the positioning plate 238.

In one embodiment, referring to fig. 3, the transmission assembly 230 further includes a guide protection sleeve 233, the guide protection sleeve 233 is sleeved on the guide rod 231, and the guide protection sleeve 233 is clamped in the guide hole 2382. In this embodiment, the guide rod 231 is located in the guide hole 2382, 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 positioning plate 238, thereby protecting the guide rod 231 and the positioning plate 238, reducing the replacement and maintenance probability caused by long-term wear therebetween, and improving the service life of the guide rod 231 and the positioning 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 positioning 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 2322, thereby facilitating the movement of the printed circuit board onto the printed circuit board conveyor 2322.

Further, referring to fig. 2 and fig. 3, the conveying assembly 230 further includes a positioning motor 235 and a positioning screw 237, the positioning motor 235 is connected to the plasma cabinet 210, an 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, and the positioning screw 237 is inserted into the screw hole 2384, so that the positioning screw 237 is screwed with the positioning plate 238. In this embodiment, in order to facilitate the position adjustment of the positioning plate 238, the positioning motor 235 is disposed to drive the positioning screw 237 to rotate, and the positioning screw 237 is disposed in the threaded hole 2384, so that the external thread structure of the positioning screw 237 is meshed with the internal thread structure of the threaded hole 2384, and 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. Thus, the position of the positioning plate 238 can be adjusted by only controlling the forward and reverse 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 forward direction, the positioning plate 238 moves 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 toward the positioning motor 235.

Still further, referring to fig. 3, the transmission assembly 230 further includes a screw connection protection shaft sleeve 239, the screw connection protection shaft sleeve 239 is sleeved with the position adjustment screw 237, and the screw connection protection shaft sleeve 239 is clamped in the screw connection hole 2384. In this embodiment, since the surface of the positioning screw 237 is a thread structure, friction is likely to occur with the positioning plate 238 during the rotation process, which causes wear of the positioning screw 237 and the positioning plate 238. In order to protect the positioning screw 237, the positioning screw 237 is sleeved with a screw protection shaft sleeve 239, and the screw protection shaft sleeve 239 is clamped in the screw hole 2384, so that the positioning screw 237 is separated from the positioning plate 238, the contact area between the positioning screw 237 and the positioning plate 238 is reduced, the abrasion probability between the positioning screw 237 and the positioning plate 238 is reduced, and the service life of the positioning screw 237 is prolonged.

Still further, referring to fig. 3, the transmission assembly 230 further includes a plurality of auxiliary rollers 240, the plurality of auxiliary rollers 240 are all connected to the positioning plate 238, the plurality of auxiliary rollers 240, the driving roller 2324 and the driven roller 2326 are all located at the same side of the positioning plate 238, and the printed circuit board transmission belts 2322 are respectively sleeved on the plurality of auxiliary rollers 240. In this embodiment, since the printed circuit board conveyor belt 2322 is often in contact with the printed circuit board to convey the printed circuit board, the printed circuit board conveyor belt 2322 is worn relatively more and needs to be replaced periodically to ensure that the printed circuit board conveyor belt 2322 can normally convey the printed circuit board. However, when the length of the replaced printed circuit board conveyor belt 2322 is long, in order to not affect the cleaning efficiency of the printed circuit board, the printed circuit board conveyor belt 2322 with a long length is sleeved on the auxiliary rotating wheel 240, and the number of the specifically sleeved auxiliary rotating wheels 240 is adjusted according to the length of the printed circuit board conveyor belt 2322. Thus, the auxiliary wheel 240 increases the moving path of the printed circuit board conveyor belt 2322, and is suitable for the transmission of the printed circuit board conveyor belt 2322 with a longer length, so that the printed circuit board cleaning device is suitable for the printed circuit board conveyor belts 2322 with different lengths, the adaptability of the printed circuit board cleaning device is improved,

further, referring to fig. 3, the positioning plate 238 is provided with positioning bar holes 2386, wherein a central shaft of the auxiliary rotating wheel 240 passes through the positioning bar holes 2386 and is connected to the positioning plate 238 in an interference manner. In this embodiment, the positioning bar-shaped hole 2386 has a rectangular space, so that the auxiliary rotating wheel can move in the positioning bar-shaped hole 2386. The auxiliary rotating wheel 240 with the middle shaft penetrating through the positioning strip-shaped hole 2386 slides on the positioning plate 238, so that the distance between the auxiliary rotating wheel 240 and the driving wheel 2324, the driven wheel 2326 and other auxiliary rotating wheels 240 is changed, and the auxiliary rotating wheel 240 with the middle shaft penetrating through the positioning strip-shaped hole 2386 is in interference connection with the positioning plate 238, so that the auxiliary rotating wheel 240 with the middle shaft penetrating through the positioning strip-shaped hole 2386 is fixed after the position of the auxiliary rotating wheel 240 on the positioning plate 238 is adjusted, and is further suitable for printed circuit board conveyor belts 2322 with different lengths.

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 type 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 internal components, there is a case where the heights are different, 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 transfer of the printed circuit board, there occurs a case where the printed circuit boards are placed in an overlapping manner, that is, at least two printed circuit boards are placed on top of each other, that is, some printed circuit boards are protruded relative to the printed circuit board conveyor belt. Therefore, four corners of partial clean areas of some printed circuit boards are formed, the clean areas of the printed circuit boards are reduced, and the cleanliness of the printed circuit boards is reduced.

In order to ensure that each pcb is laid on the pcb conveyor 2322, referring to fig. 2 to 4, the plasma cleaning machine 200 further includes a pcb shifting assembly 250, wherein the pcb shifting assembly 250 includes a first rotating plate 252, a second rotating plate 254, a supporting rod 256, a rotating rod 258 and a resilient connecting member 251, the supporting rod 256 is connected to the fixing plate 234, the supporting rod 256 is further connected to the rotating rod 258, and the rotating rod 258 is located between the pcb conveyor 2322 and the plasma cleaner 220; the first rotating plate 252 and the second rotating plate 254 are disposed obliquely, 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 positions corresponding to the transmission path of the pcb, the first rotating plate 252 and the second rotating plate 254 both rotate around 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, so as to elastically press the first rotating plate 252 and the second rotating plate 254 under the elastic action of the elastic connecting member 251. When two printed circuit boards placed one above the other are transferred onto the printed circuit board transfer belt 2322, the first rotating plate 252 contacts with the edge of the raised printed circuit board, and the raised printed circuit board presses the first rotating plate 252 by the transfer of the printed circuit board transfer belt 2322, so that the first rotating plate 252 rotates, so that the first rotating plate 252 presses the elastic connection member 251, and the second rotating plate 254 is transferred toward the printed circuit board transfer belt 2322. Thus, the first rotating plate 252 reduces the transfer speed of the bumped pcb to separate the pcb from other pcbs, and the second rotating plate 254 rotates to the bumped pcb to move the bumped pcb toward the pcb conveyor 2322 by contacting the bumped pcb, thereby increasing the speed at which the bumped pcb is laid on the pcb conveyor 2322, and facilitating the leveling of the pcbs. Moreover, in the embodiment, the weight of the first rotating plate 252 is greater than that of the second rotating plate 254, after the raised printed circuit boards are leveled, the elastic force of the elastic connecting piece 251 is released, and under the action of the gravity of the first rotating plate 252, the first rotating plate 252 is restored to the position vertically facing the printed circuit board conveyor belt 2322, so that the leveling process for the next raised printed circuit board is facilitated, and each printed circuit board is ensured to be kept flat on the printed circuit board conveyor belt 2322.

To facilitate adjustment of the angle between the first rotating plate 252 and the second rotating plate 254, please refer to fig. 5 to 7, the printed circuit board shifting board assembly 250 further comprises a first positioning board 253, a second positioning board 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, the second positioning plate 255 is connected to the second rotating plate 254, the first positioning plate 253 is formed with a first rotation hole 2532 and a first positioning hole 2534 which are communicated with each other, the second positioning plate 255 is provided with a second rotation hole 2552 and a second positioning hole 2554 which are communicated with each other, the elastic connection member 251 is respectively inserted into the first rotation hole 2532 and the second rotation hole 2552, the first positioning pin 257 is inserted into the first positioning hole 2534 and connected to the elastic connection member 251, the second positioning pin 259 is disposed through the second positioning hole 2554 and connected to the elastic connection member 251. In this embodiment, the elastic connection member 251 is an arc-shaped elastic plate, the arc-shaped elastic plate has an arc-shaped structure, and a center of the arc-shaped structure of the arc-shaped elastic plate coincides with a central axis of the rotating rod 258. The elastic connection member 251 is respectively movable in the first rotation hole 2532 and the second rotation hole 2552, the first positioning pin 257 passes through the first positioning hole 2534 to connect with the elastic connection member 251, so that the first positioning plate 253 is stably connected with the elastic connection member 251, thereby determining the position between the first positioning plate 253 and the elastic connection member 251, and the second positioning pin 259 passes through the second positioning hole 2554 to connect with the elastic connection member 251, thereby stably connecting the second positioning plate 255 with the elastic connection member 251, thereby determining the position between the second positioning plate 255 and the elastic connection member 251. In this way, by rotating at least one of the first positioning plate 253 and the second positioning plate 255, the first positioning pin 257 and the second positioning pin 259 are inserted into the corresponding positioning holes, so that the included angle between the first positioning plate 253 and the second positioning plate 255 is convenient to adjust, the distance at which the second positioning plate 255 extrudes the convex printed circuit board to descend is convenient to adjust according to the thickness of the printed circuit board, and the probability of the second positioning plate 255 extruding the convex printed circuit board to be damaged is reduced.

In other embodiments, referring to fig. 6 and fig. 7, the elastic connecting member 251 is provided with a plurality of through holes 2512 uniformly distributed, 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. Thus, 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 connection member 251 and the first positioning plate 253, thereby improving the connection stability between the elastic connection member 251 and the first rotation 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 connection member 251 and the second positioning plate 255, thereby improving the connection stability between the elastic connection member 251 and the second rotation plate 254.

In the embodiments, the plasma cleaner is used for generating plasma and acting the plasma on the surface of the base material of the printed circuit board, wherein high-energy particles in the plasma bombard the surface of the base material of the printed circuit board, so that foreign matters on the surface of the base material remained on the surface of the printed circuit board are removed, the surface of the base material 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 surface of the base material of the printed circuit board, the high-energy atoms, molecules or atom groups (functional groups) are attached to the surface of the base material of the printed circuit board, that is, polar group molecules are attached to the surface of the base material of the printed circuit board, that is, atoms or molecules with high affinity to water are attached to the surface of the base material of the printed circuit board, so that the cleaning effect is achieved, and the hydrophilicity of the surface of the base material of the printed circuit board is enhanced.

And when the high-energy particles in the plasma bombard the surface of the base material of the printed circuit board, the surface of the base material of the printed circuit board is subjected to plasma etching, namely, the surface of the base material of the printed circuit board is subjected to nanoscale etching, so that nanoscale etching through holes or grooves appear on the surface of the base material of the printed circuit board, the roughness of the surface of the base material of the printed circuit board is increased, and the surface tension performance of the chemical solution on the surface of the base material of the printed circuit board is improved.

In addition, because the plasma contains a large amount of positive ions and negative ions, when the plasma acts on the surface of the base material of the printed circuit board, the plasma neutralizes electrostatic charges on the surface of the base material of the printed circuit board, so that the amount of electrostatic charges on the surface of the base material of the printed circuit board is reduced, the electrostatic field on the surface of the base material of the printed circuit board is reduced, and the electrostatic effect on the surface of the base material of the printed circuit board is reduced.

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

The present application further provides a printed circuit board cleaning system, comprising: the printed circuit board cleaning equipment of any embodiment of the above, further include a static electricity detection machine, the static electricity detection machine includes a static electricity box and a static electricity detection device, the static electricity detection device set up in the static electricity box, the static electricity box is close to the plasma cabinet sets up, just the input hole of static electricity box with the discharge opening corresponds. In this embodiment, the printed circuit board cleaning apparatus includes a contact type cleaning machine and a plasma cleaning machine. The contact cleaning machine includes a cleaning support, a cleaning conveyor belt, and a cleaning shaft. The cleaning conveyor belt is connected with the cleaning support. The cleaning shaft is located on one surface, deviating from the cleaning support, of the cleaning conveyor belt, and the axial direction of the cleaning shaft is parallel to the conveying surface of the cleaning conveyor belt. The plasma cleaner includes a plasma chassis, a plasma cleaner, and a transfer assembly. The plasma cleaner and the transfer assembly are both located within the plasma chassis. The plasma machine box is provided with a feeding hole and a discharging hole which are oppositely arranged. The cleaning conveyor belt is arranged close to the plasma cabinet and corresponds to the feeding hole. The conveying assembly comprises a transmission part, a fixing plate and a connecting rod. The transmission part comprises 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 with the plasma cabinet. The connecting rod is far away from the transmission motor, and the connecting rod is further connected with the plasma cabinet. The plasma cleaner with connecting rod sliding connection, just the clean output of plasma cleaner is towards the setting of printed circuit board conveyer belt. And an output shaft of the transmission motor is connected with a middle shaft of the driving wheel. The driven wheel is movably connected with the plasma case. The printed circuit board conveyor belt is sleeved on the driving wheel and the driven wheel respectively, and is used for moving the printed circuit board from the starting end close to the feeding hole to the terminal end close to the discharging hole. Wherein, clean conveyer belt and the printed circuit board conveyer belt all is used for transporting printed circuit board. Through set up the plasma cleaner behind the contact cleaner, the conveying has printed circuit board on the printed circuit board conveyer belt, the output of plasma cleaner is towards printed circuit board, like this, after printed circuit board passes through the cleanness of contact cleaner, move to plasma cleaner department under the drive of printed circuit board conveyer belt, make plasma cleaner carry out the secondary cleaning to printed circuit board, and, plasma cleaner has relative motion for the printed circuit board conveying, the realization is to the comprehensive cleanness in each region of printed circuit board, thereby make the granule that the particle size is less on the printed circuit board clear away, and then make the cleanliness of printed circuit board improve.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A printed circuit board cleaning apparatus, comprising:

the contact type cleaning machine comprises a cleaning support, a cleaning conveyor belt and a cleaning shaft, wherein the cleaning conveyor belt is connected with the cleaning support, the cleaning shaft is positioned on one surface of the cleaning conveyor belt, which is far away from the cleaning support, 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 machine box, a plasma cleaner and a conveying assembly, wherein the plasma cleaner and the conveying assembly are both positioned in the plasma machine box, the plasma machine box is provided with a feeding hole and a discharging hole which are oppositely arranged, the cleaning conveyor belt is arranged close to the plasma machine box, and the cleaning conveyor belt is also arranged corresponding to the feeding hole;

the transmission component comprises a transmission part, a fixed plate and a connecting rod, the transmission part comprises 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 with the plasma cabinet, the connecting rod is far away from the transmission motor, the connecting rod is also connected with the plasma cabinet, the plasma cleaner is connected with the connecting rod in a sliding manner, and the cleaning output end of the plasma cleaner is arranged towards the printed circuit board conveyor belt; the output shaft of the transmission motor is connected with the center shaft of the driving wheel, the driven wheel is movably connected with the plasma cabinet, 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 for moving a printed circuit board from an initial end close to the feeding hole to a terminal end close to the discharging hole, and the cleaning conveyor belt and the printed circuit board conveyor belt are both used for conveying the printed circuit board.

2. The printed circuit board cleaning apparatus according to claim 1, wherein a sliding direction of the plasma cleaner is perpendicular to a conveying direction of the printed circuit board conveyor belt.

3. The printed circuit board cleaning device according to claim 1, wherein the conveying assembly further comprises a positioning plate and a guide rod, the driving wheel and the driven wheel are rotatably arranged on the positioning plate, the guide rod is connected with the plasma cabinet, the positioning plate is provided with a guide hole, and the guide rod is arranged in the guide hole in a penetrating manner.

4. The printed circuit board cleaning apparatus of claim 3, wherein the conveying assembly further comprises a guide protection sleeve, the guide protection sleeve is sleeved on the guide rod, and the guide protection sleeve is clamped in the guide hole.

5. The printed circuit board cleaning apparatus according to claim 3, wherein an axial direction of the guide bar is parallel to an axial direction of an output shaft of the transmission motor.

6. The printed circuit board cleaning apparatus according to claim 3, wherein the conveying assembly further comprises a positioning motor and a positioning screw, the positioning motor is connected with the plasma cabinet, an output shaft of the positioning motor is connected with the positioning screw, the positioning plate is provided with a screwing hole, and the positioning screw is inserted into the screwing hole so that the positioning screw is screwed with the positioning plate.

7. The printed circuit board cleaning apparatus of claim 6, wherein the conveying assembly further comprises a screw connection protection sleeve, the screw connection protection sleeve is sleeved with the positioning screw rod, and the screw connection protection sleeve is clamped in the screw connection hole.

8. The printed circuit board cleaning apparatus of claim 3, wherein the conveying assembly further comprises a plurality of auxiliary rollers, the plurality of auxiliary rollers are connected to the positioning plate, the plurality of auxiliary rollers, the driving wheel and the driven wheel are located on the same side of the positioning plate, and the printed circuit board conveying belt is respectively sleeved on the plurality of auxiliary rollers.

9. The printed circuit board cleaning apparatus according to claim 8, wherein the positioning plate is formed with a positioning bar hole, and a center shaft of one of the auxiliary wheels is inserted into the positioning bar hole and is in interference connection with the positioning plate.

10. A printed circuit board cleaning system comprising the printed circuit board cleaning apparatus of any one of claims 1 to 9, further comprising a static electricity detection machine, the static electricity detection machine comprising a static electricity box and a static electricity detection device, the static electricity detection device being disposed in the static electricity box, the static electricity box being disposed adjacent to the plasma cabinet, and an input hole of the static electricity box corresponding to the discharge hole.