A PCB board dust-free patch device and method

Abstract

The invention provides a PCB dust-free patch device and method, comprising a device housing and a PCB conveyor belt, wherein the PCB conveyor belt is installed on the inner surface of the device housing, a patch device is installed on the outer surface of the device housing, a dust-proof mechanism is arranged on the outer surface of the device housing, a limiting mechanism is arranged on the top surface of the device housing, a dust removal mechanism is arranged on the top surface of the limiting mechanism, a correction mechanism is arranged on the bottom surface of the device housing, a sampling mechanism is arranged on the outer surface of the dust-proof mechanism, the dust-proof mechanism wraps the front half of the PCB conveyor belt and the patch device and protects the internal components of the PCB dust-free patch device from being contaminated by dust and impurities, while allowing the operator to observe the operation of the device, and the dust removal mechanism absorbs the dust remaining on the PCB surface and transports it to a dust box through a connecting hose for unified treatment.

Description

Technical Field

[0001] The invention relates to the technical field related to printed circuits, and in particular to a PCB board dust-free placement device and method. Background Art

[0002] PCB patch is one of the core processes in modern electronic manufacturing. It achieves highly integrated and dense circuit design by mounting tiny electronic components on the surface of PCB. This process not only improves the performance of electronic equipment, but also reduces the size of the equipment, making it lighter. In the PCB patch process, various SMT components are accurately positioned to the predetermined position on the PCB by automated equipment, and then they are connected to the PCB using welding technology to ensure reliable electrical connection. This step requires a high degree of precision and process control to ensure that the components are correctly positioned and there are no short circuits or cold solder joints. PCB patch is widely used in the electronics industry, including mobile phones, computers, televisions, medical equipment, etc. The manufacture of various electronic products provides technical support for the miniaturization, high performance and reliability of electronic equipment, and promotes the development of modern electronic technology. At the same time, PCB board patch also represents the achievement of high automation and engineering technology in electronic manufacturing. After searching, the PCB board patch device announced as CN115557155A has an open patch mode as the conveyor belt, which is easily affected by the external environment. During use, PCB manufacturing and assembly are highly precise work, especially in the SMT process, which requires highly precise component positioning and welding. Dust and impurities may cause poor connection, short circuit and other quality problems. PCB boards are usually used in electronic equipment and require high reliability. Dust and impurities may cause equipment failure or premature damage, affect product life, and cause poor patch effect, so there is a special need for a PCB board dust-free patch device and method.

[0003] However, in the existing PCB mounting equipment, most of the PCB mounting equipment may cause signal interference and performance degradation due to impurities and tiny gaps between electronic components during use. If the PCB needs to be reprocessed or repaired after manufacturing and assembly, it will increase production costs. Summary of the invention

[0004] The purpose of the invention is to provide a PCB board dust-free patch equipment and method to solve the existing PCB board patch equipment proposed in the above background technology. During use, PCB manufacturing and assembly are highly precise work, especially in the SMT process, which requires highly precise component positioning and welding. Dust and impurities may cause poor connection, short circuit and other quality problems. PCB boards are usually used in electronic equipment and require high reliability. Dust and impurities may cause equipment failure or premature damage, affect product life, and cause poor patch effect.

[0005] To achieve the above-mentioned purpose, the invention provides a PCB board dust-free patch device and method, including a device housing and a PCB conveyor belt, the inner surface of the device housing is installed with a PCB conveyor belt, the outer surface of the device housing is installed with a patch device, the outer surface of the device housing is provided with a dustproof mechanism, the top surface of the device housing is provided with a limiting mechanism, the top surface of the limiting mechanism is provided with a dust removal mechanism, the bottom surface of the device housing is provided with a correction mechanism, and the outer surface of the dustproof mechanism is provided with a sampling mechanism.

[0006] Preferably, the dustproof mechanism includes a fixed bracket, an electric push rod, a connecting beam, a movable housing, a window plate, a fixed housing and an input-output interface, the outer surface of the equipment housing is fixedly connected to the fixed bracket, the inner surface of the fixed bracket is fixedly connected to the electric push rod, the output end of the electric push rod is fixedly connected to the connecting beam, the inner surface of the connecting beam is fixedly connected to the movable housing, the inner surface of the movable housing is fixedly connected to the window plate, the inner surface of the movable housing is slidably connected to the fixed housing, and the outer surface of the fixed housing is provided with an input-output interface.

[0007] Preferably, the number of the fixed brackets is four and they are symmetrically distributed, both sides of the movable housing are fixedly connected to the connecting beams, the fixed housing is fixedly connected to the equipment housing, and the input and output interface passes through the fixed housing.

[0008] Preferably, the limiting mechanism includes a mounting column, an electric shaft, a connecting piece, a connecting frame and a barrier net, the top surface of the equipment housing is fixedly connected to the mounting column, the top surface of the mounting column is rotatably connected to the electric shaft, the outer surface of the electric shaft is threadedly connected to the connecting piece, one end of the connecting piece is fixedly connected to the connecting frame, and the inner surface of the connecting frame is fixedly connected to the barrier net.

[0009] Preferably, the number of the mounting posts is two and they are symmetrically distributed, a threaded groove is provided on the outer surface of the electric shaft, and the connecting frame penetrates the device housing and is slidably connected to the device housing.

[0010] Preferably, the dust removal mechanism includes a movable frame, a dust removal fan, a connecting hose, a sealing ring and a dust box. The top surface of the connecting frame is fixedly connected to the movable frame, the inner surface of the movable frame is fixedly connected to the dust removal fan, the output end of the dust removal fan is fixedly connected to the connecting hose, the outer surface of the connecting hose is fixedly connected to the sealing ring, and the top of the connecting hose is fixedly connected to the dust box.

[0011] Preferably, the dust box is fixedly connected to the top surface of the fixed shell, and the connecting hose passes through the interior of the dust box.

[0012] Preferably, the correction mechanism includes a follower rocker, a gear block, an active rocker, a connecting rod, a correction housing, a correction column and a connecting rod, the bottom of the device housing is rotatably connected to the follower rocker, the bottom of the device housing is rotatably connected to the gear block, one end of the gear block is fixedly connected to the active rocker, one end of the active rocker is hingedly connected to the connecting rod, the top surface of the connecting rod is fixedly connected to the correction housing, the inner surface of the correction housing is slidably connected to the correction column, and one end of the correction column is fixedly connected to the connecting rod.

[0013] Preferably, the number of the follower rockers is two and they are symmetrically distributed, the number of the gear blocks is two, the gear blocks are meshed with each other, the length of the follower rocker is consistent with that of the active rocker, the other end of the connecting rod is hinged to the follower rocker, the number of the correction columns in each correction housing is two, and both ends of the connecting rod are fixedly connected to the correction columns.

[0014] Preferably, the sampling mechanism includes a mounting plate, a sliding groove, a magnetic block, a sliding shell and a conveyor belt, the inner surface of the movable shell is fixedly connected to the mounting plate, the inner surface of the mounting plate is provided with a sliding groove, the inner surface of the sliding groove is fixedly connected to the magnetic block, the inner surface of the sliding groove is fixedly connected to the sliding shell, and the inner surface of the sliding shell is fixedly connected to the conveyor belt.

[0015] Preferably, the number of the mounting plates is two and they are symmetrically distributed, and the sliding housing is made of stainless steel.

[0016] Compared with the prior art, the invention has the following beneficial effects: the PCB board dust-free patch equipment and method have the following effects:

[0017] 1. Through the arrangement of a fixed bracket, an electric push rod, a connecting beam, a movable housing, a window panel, a fixed housing and an input / output interface, during use, the fixed bracket is fixedly connected to the electric push rod so that it is installed on the equipment housing, and the output end can lift the movable housing by lifting the connecting beam. The movable housings on both sides are connected by connecting beams so that the movable housings can rise synchronously and can be used for maintenance after being opened. A window panel is installed on the movable housing for real-time observation of the internal situation. The fixed housing is fixed on the equipment housing and will not be lifted up with the movable housing. An input / output interface is provided on the fixed housing for inputting and outputting the PCB board on the PCB conveyor belt. The dustproof mechanism wraps and protects the front half of the PCB conveyor belt and the patch device to protect the internal components of the PCB dust-free patch equipment from dust and impurities, while allowing the operator to observe the operation of the equipment.

[0018] 2. Through the arrangement of the movable frame, dust removal fan, connecting hose, sealing ring and dust box, during use, the movable frame is installed on the connecting frame and can move together with the connecting frame to keep the dust removal fan and the PCB board at a close distance. The dust removal fan absorbs the dust remaining on the surface of the PCB and transports it to the dust box through the connecting hose for unified treatment. The sealing ring is used to ensure the sealing of the connection. Since the limit mechanism will limit the movement of the PCB board, the dust removal mechanism will only have the effect of dust removal and adsorption, and will not cause the PCB board to move.

[0019] 3. Through the arrangement of the slave rocker, gear block, active rocker, connecting rod, correction housing, correction column and connecting rod, during use, the slave rocker, active rocker and connecting rod form a hinged four-bar structure. Since the length of the slave rocker is consistent with that of the active rocker, the cover mechanism is a parallel screw and a double rocker structure, shaking the rocker on one side will drive the rocker on the other side to shake synchronously and always keep parallel, and the connecting rod also always keeps parallel to the PCB conveyor belt. The active rockers on both sides are fixedly connected to the gear block, so that rotating the gear block to engage can make the gear blocks on both sides rotate synchronously, so that the rotation angle of the active rockers on both sides is the same, ensuring The centering of the correction mechanism is improved. Since the connecting rod always remains parallel to the PCB conveyor belt, the movement of the double rocker structure will only change the distance between the connecting rod and the PCB conveyor belt. In this way, the spacing between the correction column and the connecting rod on the correction shell can be changed to correct the movement range of the PCB board on the PCB conveyor belt. The correction column and the correction shell have an interference fit and will not move easily inside the correction shell without being affected by external force. They are connected through the connecting rod, and the position of the inner correction column can be adjusted by the outer correction column, thereby achieving the effect of correcting the position of the PCB board on the PCB conveyor belt and facilitating the adjustment of the spacing to accommodate PCB boards of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a side view schematic diagram of the overall structure of the invention;

[0021] Figure 2 It is a side view schematic diagram of the overall structure of the invention;

[0022] Figure 3 It is a side view schematic diagram of the internal mechanism of the invention;

[0023] Figure 4 A schematic diagram of the structure of the various components of the dust-proof mechanism;

[0024] Figure 5 A schematic diagram of the structure of the mutual cooperation of the limiting mechanisms of the invention;

[0025] Figure 6 A schematic diagram of the structure of the electric shaft and the connecting member cooperating with each other;

[0026] Figure 7 This is a schematic diagram of the structure of the movable frame and the dust removal fan cooperating with each other;

[0027] Figure 8 A schematic diagram of the structure of the connecting hose and the dust box cooperating with each other;

[0028] Fig. 9 A schematic diagram of the structure of the cooperation between the slave rocker and the master rocker is provided;

[0029] Fig.10 This is a schematic diagram of the structure of the correction shell and the correction column cooperating with each other;

[0030] Fig.11 The present invention is a schematic diagram of the structure in which the components of the sampling mechanism cooperate with each other.

[0031] In the figure: 1. Equipment housing; 2. PCB conveyor belt; 3. SMT device; 4. Dust-proof mechanism; 401. Fixed bracket; 402. Electric push rod; 403. Connecting beam; 404. Movable housing; 405. Window plate; 406. Fixed housing; 407. Input and output interface; 5. Limiting mechanism; 501. Mounting column; 502. Electric shaft; 503. Connecting piece; 504. Connecting frame; 505. Barrier net; 6. Dust removal mechanism; 6 01. Movable frame; 602. Dust removal fan; 603. Connecting hose; 604. Sealing ring; 605. Dust box; 7. Correction mechanism; 701. Follower rocker; 702. Gear block; 703. Active rocker; 704. Connecting rod; 705. Correction housing; 706. Correction column; 707. Connecting rod; 8. Sampling mechanism; 801. Mounting plate; 802. Sliding groove; 803. Magnetic block; 804. Sliding housing; 805. Conveyor belt. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the invention to clearly and completely describe the technical solutions in the embodiments of the invention. Obviously, the implementation regulations described are only part of the embodiments of the invention, not all of the embodiments. Based on the embodiments of the invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the invention.

[0033] See also Figure 1-11The invention provides a PCB dust-free patch device and method: it includes a device housing 1 and a PCB conveyor belt 2, the PCB conveyor belt 2 is installed on the inner surface of the device housing 1, the patch device 3 is installed on the outer surface of the device housing 1, the outer surface of the device housing 1 is provided with a dustproof mechanism 4, the top surface of the device housing 1 is provided with a limiting mechanism 5, the top surface of the limiting mechanism 5 is provided with a dust removal mechanism 6, the bottom surface of the device housing 1 is provided with a correction mechanism 7, and the outer surface of the dustproof mechanism 4 is provided with a sampling mechanism 8. During use, the device housing 1 is installed with the PCB conveyor belt 2 and the patch device 3, the PCB conveyor belt 2 conveys the PCB board, and the patch device 3 performs patch processing on the PCB board.

[0034] Further, the dustproof mechanism 4 includes a fixed bracket 401, an electric push rod 402, a connecting beam 403, a movable housing 404, a window plate 405, a fixed housing 406 and an input-output interface 407. The outer surface of the device housing 1 is fixedly connected with the fixed bracket 401, the inner surface of the fixed bracket 401 is fixedly connected with the electric push rod 402, the output end of the electric push rod 402 is fixedly connected with the connecting beam 403, the inner surface of the connecting beam 403 is fixedly connected with the movable housing 404, the inner surface of the movable housing 404 is fixedly connected with the window plate 405, the inner surface of the movable housing 404 is slidably connected with the fixed housing 406, and the outer surface of the fixed housing 406 is provided with an input-output interface 407. The setting is that during use, the fixed bracket 401 is fixedly connected to the electric push rod 402 so that it is installed on the equipment housing 1, and the output end can lift the movable housing 404 by lifting the connecting beam 403. The movable housings 404 on both sides are connected by the connecting beam 403 so that the movable housings 404 can rise synchronously, and can be used for maintenance after opening. A window panel 405 is installed on the movable housing 404 for observing the internal situation in real time. The fixed housing 406 is fixed on the equipment housing 1 and will not be lifted together with the movable housing 404. An input and output interface 407 is provided on the fixed housing 406 for inputting and outputting the PCB board on the PCB conveyor belt 2. The dustproof mechanism 4 wraps the front half of the PCB conveyor belt 2 and the patch device 3 and protects the internal components of the PCB board dust-free patch equipment from being contaminated by dust and impurities, while allowing the operator to observe the operation of the equipment.

[0035] Furthermore, the number of fixed brackets 401 is four and they are symmetrically distributed, both sides of the movable shell 404 are fixedly connected to the connecting beam 403, the fixed shell 406 is fixedly connected to the equipment shell 1, the input and output interface 407 runs through the fixed shell 406, and multiple fixed brackets 401 are installed with multiple electric push rods 402 to disperse the force when pushing the movable shell 404 to rise and fall, the fixed shell 406 is fixed and will not move with the movable shell 404, and the input and output interface 407 is used to input and output the PCB boards on the PCB conveyor belt 2.

[0036] Furthermore, the limiting mechanism 5 includes a mounting column 501, an electric shaft 502, a connecting piece 503, a connecting frame 504 and a barrier net 505. The top surface of the device housing 1 is fixedly connected with the mounting column 501, the top surface of the mounting column 501 is rotatably connected with the electric shaft 502, the outer surface of the electric shaft 502 is threadedly connected with the connecting piece 503, one end of the connecting piece 503 is fixedly connected with the connecting frame 504, and the inner surface of the connecting frame 504 is fixedly connected with the barrier net 505. The components 503, the connecting frame 504 and the barrier net 505 are arranged. During use, the mounting column 501 is threadedly connected to the connecting component 503 through the electric rotating shaft 502. Rotating the electric rotating shaft 502 can drive the connecting component 503 to move in the vertical direction, and drive the connecting frame 504 to move in the vertical direction. The height can be adjusted to adapt to PCB boards of different sizes. A barrier net 505 is installed on the connecting frame 504. The mesh size of the barrier net 505 is relatively large and is only used to prevent the PCB board passing through the connecting frame 504 from being lifted up, and will not affect the dust removal of the dust removal mechanism 6.

[0037] Furthermore, the number of mounting posts 501 is two and they are symmetrically distributed, a threaded groove is provided on the outer surface of the electric shaft 502, the connecting frame 504 passes through the device housing 1 and is slidably connected to the device housing 1, and the symmetrically arranged mounting posts 501 are connected to the connecting piece 503 through the electric shaft 502, so that the rotation can be limited to vertical movement only, and the connecting frame 504 can be vertically moved on the device housing 1 to adjust the height to adapt to PCB boards of different sizes.

[0038] Furthermore, the dust removal mechanism 6 includes a movable frame 601, a dust removal fan 602, a connecting hose 603, a sealing ring 604 and a dust box 605. The top surface of the connecting frame 504 is fixedly connected to the movable frame 601, the inner surface of the movable frame 601 is fixedly connected to the dust removal fan 602, the output end of the dust removal fan 602 is fixedly connected to the connecting hose 603, the outer surface of the connecting hose 603 is fixedly connected to the sealing ring 604, and the top of the connecting hose 603 is fixedly connected to the dust box 605. 3. The setting of the sealing ring 604 and the dust box 605. During use, the movable frame 601 is installed on the connecting frame 504 and can move together with the connecting frame 504 to keep the dust removal fan 602 and the PCB board always at a close distance. The dust removal fan 602 absorbs the dust remaining on the surface of the PCB and transports it to the dust box 605 through the connecting hose 603 for unified treatment. The sealing ring 604 is used to ensure the sealing of the connection. Since the limiting mechanism 5 will limit the movement of the PCB board, the dust removal mechanism 6 will only have the effect of dust removal and adsorption, and will not cause the PCB board to move.

[0039] Furthermore, the dust box 605 is fixedly connected to the top surface of the fixed shell 406, and the connecting hose 603 runs through the interior of the dust box 605. The fixed shell 406 will not move and is used to fix the dust box 605, which is an immovable component. The dust removal fan 602 absorbs the dust remaining on the surface of the PCB and transports it to the dust box 605 through the connecting hose 603 for unified treatment.

[0040] Furthermore, the correction mechanism 7 includes a slave rocker 701, a gear block 702, an active rocker 703, a connecting rod 704, a correction housing 705, a correction column 706 and a connecting rod 707. The bottom of the device housing 1 is rotatably connected to the slave rocker 701, the bottom of the device housing 1 is rotatably connected to the gear block 702, one end of the gear block 702 is fixedly connected to the active rocker 703, one end of the active rocker 703 is hingedly connected to the connecting rod 704, the top surface of the connecting rod 704 is fixedly connected to the correction housing 705, and the inner surface of the correction housing 705 is fixedly connected to the inner surface of the correction housing 705. The side surface is slidably connected with a correction column 706, one end of which is fixedly connected with a connecting rod 707. Through the arrangement of the slave rocker 701, the gear block 702, the active rocker 703, the connecting rod 704, the correction housing 705, the correction column 706 and the connecting rod 707, during use, the slave rocker 701, the active rocker 703 and the connecting rod 704 form a hinged four-bar structure. Since the slave rocker 701 is the same length as the active rocker 703, the cover mechanism is a parallel screw and a double rocker structure, shaking the rocker on one side will drive The rocker on the other side rocks synchronously and always remains parallel, and the connecting rod 704 also always remains parallel to the PCB conveyor belt 2. The active rockers 703 on both sides are fixedly connected to the gear block 702. In this way, rotating the gear block 702 to engage can make the gear blocks 702 on both sides rotate synchronously, so that the rotation angles of the active rockers 703 on both sides are the same, ensuring the centering of the correction mechanism 7. Since the connecting rod 704 always remains parallel to the PCB conveyor belt 2, the movement of the double rocker structure will only change the distance between the connecting rod 704 and the PCB conveyor belt 2. In this way, the spacing between the correction column 706 and the connecting rod 707 on the correction housing 705 can be changed to correct the movement range of the PCB board on the PCB conveyor belt 2. The correction column 706 and the correction housing 705 are interference fit and will not easily move inside it without being affected by external forces. They are connected by the connecting rod 707, and the position of the inner correction column 706 can be adjusted by the outer correction column 706, thereby achieving the effect of correcting the position of the PCB board on the PCB conveyor belt 2 and facilitating the adjustment of the spacing to accommodate PCB boards of different sizes.

[0041] Furthermore, the number of slave rockers 701 is two and they are symmetrically distributed, the number of gear blocks 702 is two, the gear blocks 702 are meshed with each other, the length of the slave rocker 701 is consistent with that of the active rocker 703, the other end of the connecting rod 704 is hinged to the slave rocker 701, the number of correction columns 706 in each correction housing 705 is two, both ends of the connecting rod 707 are fixedly connected to the correction column 706, the slave rocker 701, the active rocker 703 and the connecting rod 704 form a hinged four-bar structure, and since the length of the slave rocker 701 is consistent with that of the active rocker 703, the cover mechanism is a parallel screw and a double rocker structure.

[0042] Furthermore, the sampling mechanism 8 includes a mounting plate 801, a sliding groove 802, a magnetic block 803, a sliding shell 804 and a conveyor belt 805. The inner surface of the movable shell 404 is fixedly connected with the mounting plate 801, the inner surface of the mounting plate 801 is provided with a sliding groove 802, the inner surface of the sliding groove 802 is fixedly connected with the magnetic block 803, the inner surface of the sliding groove 802 is fixedly connected with the sliding shell 804, and the inner surface of the sliding shell 804 is fixedly connected with the conveyor belt 805. 802, magnetic block 803, sliding shell 804 and conveyor belt 805 are set. During use, the mounting plate 801 is used to install components and open the sliding groove 802. The sliding shell 804 can slide in the sliding groove 802. When not in use, it is adsorbed on the top by the magnetic block 803 without affecting the conveying of the PCB conveyor belt 2. After being lowered, it contacts with the PCB conveyor belt 2 to block the PCB board and is transported to the outside of the dustproof mechanism 4 through the conveyor belt 805 for spot checking the dust removal situation to prevent unqualified PCB boards from entering the subsequent processing steps.

[0043] Furthermore, the number of mounting plates 801 is two and they are symmetrically distributed. The sliding shell 804 is made of stainless steel. The symmetrically arranged mounting plates 801 can clamp the sliding shell 804 and are used in conjunction with the magnetic suction block 803.

[0044] Working principle: A PCB board dust-free patch device and method. During use, the device housing 1 is installed with a PCB conveyor belt 2 and a patch device 3. The PCB conveyor belt 2 conveys the PCB board, and the patch device 3 performs patch processing on the PCB board. The fixed bracket 401 is fixedly connected to the electric push rod 402, and the movable housing 404 is lifted by lifting the connecting beam 403. The fixed housing 406 is provided with an input and output interface 407 for inputting and outputting the PCB board on the PCB conveyor belt 2. The electric shaft 502 is threadedly connected to the connecting piece 503, and the electric shaft 502 is rotated to drive the connecting piece 5 03 moves in the vertical direction, the blocking net 505 prevents the PCB board from being lifted through the connecting frame 504, the dust removal fan 602 absorbs the dust remaining on the surface of the PCB and transports it to the dust box 605 through the connecting hose 603 for unified treatment, the rotating gear block 702 drives the active rocker 703 and the slave rocker 701 to shake, drives the correction shell 705 and the correction column 706 to adjust the spacing correction path, the sliding shell 804 contacts the PCB conveyor belt 2 to block the PCB board and transport it to the outside of the dustproof mechanism 4 through the conveyor belt 805, thus completing a PCB board dust-free patch equipment and method.

[0045] Although embodiments of the invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A PCB board dust-free placement device, comprising a device housing (1) and a PCB conveyor belt (2), characterized in that: A PCB conveyor belt (2) is installed on the inner surface of the device housing (1), a patch device (3) is installed on the outer surface of the device housing (1), a dustproof mechanism (4) is provided on the outer surface of the device housing (1), the dustproof mechanism (4) wraps the front half of the PCB conveyor belt (2) and the patch device (3) and protects the internal components of the PCB dust-free patch device from being polluted by dust and impurities, a limiting mechanism (5) is provided on the top surface of the device housing (1), the limiting mechanism (5) is used to limit the movement of the PCB board, a dust removal mechanism (6) is provided on the top surface of the limiting mechanism (5), the dust removal mechanism (6) only has the effect of dust removal and adsorption, and will not move the PCB board, a correction mechanism (7) is provided on the bottom surface of the device housing (1), the correction mechanism (7) is used to correct the position of the PCB board on the PCB conveyor belt and facilitate the adjustment of the spacing to adapt to PCB boards of different sizes, and a sampling mechanism (8) is provided on the outer surface of the dustproof mechanism (4), the sampling mechanism (8) is used to spot check the dust removal situation to prevent unqualified PCB boards from entering the subsequent processing steps; The dustproof mechanism (4) comprises a fixed bracket (401), an electric push rod (402), a connecting beam (403), a movable housing (404), a window plate (405), a fixed housing (406) and an input / output interface (407); the outer surface of the device housing (1) is fixedly connected to the fixed bracket (401); the inner surface of the fixed bracket (401) is fixedly connected to the electric push rod (402); the output end of the electric push rod (402) is fixedly connected to the connecting beam (403); the inner surface of the connecting beam (403) is fixedly connected to the movable housing (404); the inner surface of the movable housing (404) is fixedly connected to the window plate (405); the inner surface of the movable housing (404) is slidably connected to the fixed housing (406); the fixed housing (406) is fixedly connected to the device housing (1); and the outer surface of the fixed housing (406) is provided with an input / output interface (407) for inputting and outputting PCB boards on the PCB conveyor belt (2).

2. A PCB board dust-free placement equipment according to claim 1, characterized in that: The number of the fixed brackets (401) is four and they are symmetrically distributed; both sides of the movable housing (404) are fixedly connected to the connecting beam (403); and the input and output interface (407) passes through the fixed housing (406).

3. A PCB board dust-free placement equipment according to claim 2, characterized in that: The limiting mechanism (5) comprises a mounting column (501), an electric rotating shaft (502), a connecting piece (503), a connecting frame (504) and a barrier net (505); the top surface of the device housing (1) is fixedly connected to the mounting column (501); the top surface of the mounting column (501) is rotatably connected to the electric rotating shaft (502); the outer surface of the electric rotating shaft (502) is threadedly connected to the connecting piece (503); one end of the connecting piece (503) is fixedly connected to the connecting frame (504); and the inner surface of the connecting frame (504) is fixedly connected to the barrier net (505).

4. A PCB board dust-free placement equipment according to claim 3, characterized in that: The number of the mounting columns (501) is two and they are symmetrically distributed; a threaded groove is provided on the outer surface of the electric rotating shaft (502); and the connecting frame (504) penetrates the device housing (1) and is slidably connected to the device housing (1).

5. A PCB board dust-free placement equipment according to claim 4, characterized in that: The dust removal mechanism (6) comprises a movable frame (601), a dust removal fan (602), a connecting hose (603), a sealing ring (604) and a dust box (605); the top surface of the connecting frame (504) is fixedly connected to the movable frame (601); the inner surface of the movable frame (601) is fixedly connected to the dust removal fan (602); the output end of the dust removal fan (602) is fixedly connected to the connecting hose (603); the outer surface of the connecting hose (603) is fixedly connected to the sealing ring (604); and the top of the connecting hose (603) is fixedly connected to the dust box (605).

6. A PCB board dust-free placement equipment according to claim 5, characterized in that: The dust box (605) is fixedly connected to the top surface of the fixed housing (406), and the connecting hose (603) passes through the interior of the dust box (605).

7. A PCB board dust-free placement equipment according to claim 6, characterized in that: The correction mechanism (7) comprises a slave rocker (701), a gear block (702), an active rocker (703), a connecting rod (704), a correction housing (705), a correction column (706) and a connecting rod (707); the bottom of the device housing (1) is rotatably connected to the slave rocker (701); the bottom of the device housing (1) is rotatably connected to the gear block (702); one end of the gear block (702) is fixedly connected to the active rocker (703); one end of the active rocker (703) is hingedly connected to the connecting rod (704); the top surface of the connecting rod (704) is fixedly connected to the correction housing (705); the inner surface of the correction housing (705) is slidably connected to the correction column (706); and one end of the correction column (706) is fixedly connected to the connecting rod (707).

8. The PCB board dust-free placement equipment according to claim 7, characterized in that: The number of the slave rockers (701) is two and they are symmetrically distributed, the number of the gear blocks (702) is two, the gear blocks (702) are meshed with each other, the length of the slave rocker (701) is consistent with that of the master rocker (703), the other end of the connecting rod (704) is hingedly connected to the slave rocker (701), the number of the correction columns (706) in each correction housing (705) is two, and both ends of the connecting rod (707) are fixedly connected to the correction columns (706).

9. The PCB board dust-free placement equipment according to claim 8, characterized in that: The sampling mechanism (8) comprises a mounting plate (801), a sliding groove (802), a magnetic block (803), a sliding shell (804) and a conveyor belt (805); the inner surface of the movable shell (404) is fixedly connected to the mounting plate (801); the inner surface of the mounting plate (801) is provided with a sliding groove (802); the inner surface of the sliding groove (802) is fixedly connected to the magnetic block (803); the inner surface of the sliding groove (802) is fixedly connected to the sliding shell (804); the inner surface of the sliding shell (804) is fixedly connected to the conveyor belt (805); the number of the mounting plates (801) is two and they are symmetrically distributed; the sliding shell (804) is made of stainless steel.

10. A method for preparing a PCB board dust-free patch device, such as the PCB board dust-free patch device according to claim 9, characterized in that Package as follows; S1, placing a PCB board to be processed by patching onto a PCB conveyor belt (2), the outside of the PCB conveyor belt (2) and the patching device (3) being dustproofed by a dustproof mechanism (4), after the PCB board enters the PCB conveyor belt (2), the height of the barrier net (505) is adjusted according to the size through the electric rotating shaft (502) and the connecting piece (503), the dust removal mechanism (6) removes dust from the surface through the dust removal fan (602), the PCB board after dust removal is patched through the patching device (3), the position of the active rocker (703) is adjusted to adjust the spacing of the correction housing (705), the transmission position of the PCB conveyor belt (2) is corrected, and subsequent processing is performed; S2, lowering the sliding housing (804) until it contacts the PCB conveyor belt (2), and the conveyor belt (805) on the surface of the sliding housing (804) takes out the PCB board on the PCB conveyor belt (2) for sampling and testing the dustproof effect.

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