PCB surface cleaning device and method

Abstract

The invention discloses a PCB surface cleaning device and method, and belongs to the technical field of circuit board assembly technologies, the device comprises a base, a closable cavity, a guide rail, a PCB carrier, a self-locking pop-up mechanism, an indication unit, a blowing unit and a main control module; a closable cavity is arranged on the base, a plurality of guide rails are uniformly arranged in the closable cavity, and each guide rail is correspondingly and movably connected with a PCB (Printed Circuit Board) carrier; the self-locking pop-up mechanism is arranged on the inner side surface of the closable cavity, and the self-locking pop-up mechanism is movably connected with each PCB carrier; the indicating unit is arranged on the outer side face of the closable cavity, and the air blowing unit is arranged on the top of the closable cavity. The main control module is arranged in the closable cavity and is in control connection with the self-locking pop-up mechanism, the indication unit and the air blowing unit. The technical problem of how to reduce pollution of particulate matters to a dust-free workshop is solved.

Description

Technical Field

[0001] The invention relates to the technical field of circuit board assembly technology, and in particular to a PCB board surface cleaning device and a PCB board surface cleaning method. Background Art

[0002] SMT, the full name of Surface Mount Technology, is an electronic assembly technology that can mount electronic components, such as resistors, capacitors, inductors, integrated circuits, etc., directly onto the surface of a printed circuit board (PCB) or other substrate, and then solder them through reflow soldering or wave soldering to form a complete electronic device with certain functions.

[0003] Usually, during the production and processing of PCB boards, some dust particles and other debris will accumulate on the board surface. If the PCB boards are not cleaned before the SMT process, it will affect the assembly accuracy of the SMT and cause a large number of defects; for example, it will cause defects such as insufficient tin and false soldering. Because the PCB board should be kept away from water as much as possible before SMT, it is obviously unreasonable to use water or other cleaning methods; usually, measures such as blowing cleaning can be used.

[0004] Based on this, Chinese patent CN212550606U discloses a PCB circuit board surface cleaning device, which includes a workbench, a hair dryer is fixedly provided on one side of the top of the workbench, a dust suction mechanism is fixedly provided on one side of the operating table, a fixed table is fixedly provided at the bottom end of one side of the workbench, a lifting platform is fixedly provided on the top of the fixed table, and a cleaning mechanism is fixedly provided on one side of the lifting platform. The utility model provides a PCB circuit board surface cleaning device, by fixing a hair dryer on one side of the workbench, dust on the surface of the PCB circuit board falls off, thereby achieving a cleaning effect, by fixing a suction fan on the opposite side of the workbench, the dust blown out by the hair dryer can be more comprehensively absorbed, and the dust on the side of the PCB board close to the suction fan can be strongly sucked out, and a soft brush with a lifting function installed on the side of the workbench is lightly brushed on the surface of the PCB board, so that stubborn stains on the surface of the PCB board are loosened, and all dust on the surface of the PCB circuit board is cleaned by the action of the hair dryer and the suction fan.

[0005] However, the PCB circuit board surface cleaning device disclosed above still has technical problems such as easy pollution to the SMT production line. Specifically, the SMT workshop is usually a dust-free workshop, which is also often called a clean workshop, a clean room or a purification workshop, and is a highly clean working environment. The dust-free workshop refers to the removal of pollutants such as particles, toxic gases, bacteria within a certain space range, and the humidity, temperature, cleanliness, air flow rate, etc. are controlled within a certain range. This workshop ensures that the cleanliness of the production environment meets certain standards by means of air filtration, temperature and humidity control, and reduction of pollution sources. The cleanliness level of the dust-free workshop is usually divided according to the number of particles in the air. Common levels include 100,000, 10,000, 100, 100, etc. The smaller the number, the higher the cleanliness level and the more expensive the cost. These grade standards may vary according to international standards and domestic regional industry standards. However, the PCB circuit board surface cleaning device disclosed in the prior art may cause dust or particles to float in the air when cleaning the surface of the PCB workpiece. The dust and debris particles stirred up by the device may affect the cleanliness of the dust-free workshop, making it unable to meet the requirements of the dust-free workshop. Summary of the invention

[0006] Based on this, it is necessary to provide a PCB surface cleaning device to address the technical problem of how to reduce the pollution of particulate matter to the dust-free workshop.

[0007] A PCB surface cleaning device comprises: a base, a closable cavity, a guide rail, a PCB carrier, a self-locking pop-up mechanism, an indication unit, a blowing unit and a main control module; the closable cavity is arranged on the base, a plurality of guide rails are evenly arranged in the closable cavity, and each guide rail is movably connected to a corresponding PCB carrier; the self-locking pop-up mechanism is arranged on the inner side of the closable cavity, and the self-locking pop-up mechanism is movably connected to each PCB carrier respectively; the indication unit is arranged on the outer side of the closable cavity, and the blowing unit is arranged on the top of the closable cavity; the main control module is arranged in the closable cavity, and the main control module is controllably connected to the self-locking pop-up mechanism, the indication unit and the blowing unit respectively.

[0008] Furthermore, the base has a movable wheel group structure and a pull-out dust collection bin; the movable wheel group structure is arranged at the bottom of the closable cavity, the pull-out dust collection bin is movably arranged in the movable wheel group structure, and the pull-out integrated bin is connected to the closable cavity.

[0009] Furthermore, the self-locking ejection mechanism comprises a main connection frame, a self-locking module and an ejection module.

[0010] Furthermore, the main connecting frame is connected to the closable cavity, and the main control module is connected to the side of the main connecting frame; a plurality of the self-locking modules and a plurality of the pop-up modules are evenly distributed on the main connecting frame, and each of the self-locking modules is movably connected to a corresponding pop-up module.

[0011] Furthermore, the self-locking module has a self-locking connecting frame, an electromagnetic control unit and a position sensing unit.

[0012] Furthermore, the self-locking connection frame is connected to the main connection frame, the electromagnetic control unit is connected to the self-locking connection frame, and the position sensor unit is arranged on an adjacent side of the electromagnetic control unit.

[0013] Furthermore, the pop-up module has a pop-up connecting portion, a pop-up moving frame, a spring and a locking portion.

[0014] Furthermore, the pop-up connecting part is arranged in the main connecting frame, the pop-up movable frame is movably connected to the pop-up connecting part, and the pop-up movable frame is movably connected to the PCB carrier.

[0015] Furthermore, the spring is arranged between the main connection frame and the pop-up movable frame; the locking portion is connected to the pop-up movable frame, and the locking portion is movably connected to the electromagnetic control unit.

[0016] Furthermore, a method for using the PCB surface cleaning device as described above comprises the following steps: S1: When the closable cavity is in an open state, after the PCB carrier is pre-loaded with a number of PCB workpieces to be cleaned, the PCB carrier is pushed into the closable cavity along the corresponding guide track, and the side surface of the PCB carrier abuts against and triggers the self-locking ejection mechanism; S2: After the self-locking pop-up mechanism disposed inside the closable cavity senses that the PCB carrier is in place, the PCB carrier is locked and limited under the control of the main control module, and at this time, the indicating unit sends a locking signal; S3: The closable cavity is closed, the indicating unit sends a warning signal, and the blowing unit arranged at the top of the closable cavity sends air from top to bottom into the PCB carrier to blow and scrape the board surface of each PCB workpiece to clean it; the dust and other particles blown off enter from the bottom of the closable cavity along the thrust of the airflow and are stored in the base; S4: After the blowing and scraping cleaning process is completed, the indicating unit sends a reminder signal, and then the closable cavity is opened, and the main control module controls the self-locking pop-up mechanism to unlock the PCB carrier and pop out the PCB carrier along its corresponding guide track; S5: The operator removes the ejected PCB carrier from the opening of the closable cavity to complete a single PCB surface cleaning process.

[0017] In summary, a PCB surface cleaning device of the present invention is respectively provided with a base, a closable cavity, a guide rail, a PCB carrier, a self-locking pop-up mechanism, an indication unit, a blowing unit and a main control module; the closable cavity is arranged on the base, and a plurality of the guide rails are evenly arranged in the closable cavity, and each of the guide rails is movably connected to a corresponding PCB carrier; the self-locking pop-up mechanism is arranged on the inner side of the closable cavity, and the self-locking pop-up mechanism is movably connected to each of the PCB carriers; the indication unit is arranged on the outer side of the closable cavity, and the blowing unit is arranged on the top of the closable cavity; the main control module is arranged in the closable cavity, and the main control module is controllably connected to the self-locking pop-up mechanism, the indication unit and the blowing unit. In the cleaning process of the PCB board surface, all dust particles and other debris are limited and collected in the closable cavity, and will not overflow into the external dust-free workshop and other environments. Therefore, the PCB board surface cleaning device of the present invention solves the technical problem of how to reduce the pollution of particulate matter to the dust-free workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a PCB surface cleaning device of the present invention; Figure 2 This is a schematic diagram of the exploded structure of a PCB surface cleaning device of the present invention; Figure 3 This is a structural schematic diagram of a partial structure of a PCB surface cleaning device of the present invention; Figure 4 This is a schematic structural diagram of a partial structure of a PCB surface cleaning device according to the present invention from another direction. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0022] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" 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", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0025] Please also read Figures 1 to 4 The present invention provides a PCB surface cleaning device, comprising: a base 1, a closable cavity 2, a guide rail 3, a PCB carrier 4, a self-locking pop-up mechanism 5, an indication unit 6, a blowing unit 7 and a main control module 8; the closable cavity 2 is arranged on the base 1, a plurality of the guide rails 3 are evenly arranged in the closable cavity 2, and each of the guide rails 3 is movably connected to a corresponding PCB carrier 4; the self-locking pop-up mechanism 5 is arranged on the inner side of the closable cavity 2, and the self-locking pop-up mechanism 5 is movably connected to each of the PCB carriers 4; the indication unit 6 is arranged on the outer side of the closable cavity 2, and the blowing unit 7 is arranged on the top of the closable cavity 2; the main control module 8 is arranged in the closable cavity 2, and the main control module 8 is controlled and connected to the self-locking pop-up mechanism 5, the indication unit 6 and the blowing unit 7 respectively.

[0026] Specifically, when a PCB surface cleaning device of the present invention is in working process, several groups of PCB workpieces to be cleaned are pre-loaded on the PCB carrier 4, and then the PCB carrier 4 is pushed into the closable cavity 2 along the corresponding guide track 3, and one side of the PCB carrier 4 is abutted against and pushes the self-locking pop-up mechanism 5 until the self-locking pop-up mechanism 5 senses in place, and the main control module 8 controls the self-locking pop-up mechanism 5 to lock the PCB carrier 4; at this time, after the closable cavity 2 is closed, the PCB carrier 4 loaded with the PCB workpieces to be cleaned is confined in the closable cavity 2. Next, the main control module 8 controls the blowing unit 7 to supply air, or the blowing unit 7 introduces external airflow into the top of the closable cavity 2; the strong airflow blows through the board surface of each PCB workpiece from top to bottom in the closable cavity 2, and blows off the dust particles and the like attached to the board surface of the PCB workpiece; and then the dust particles and the like gather at the bottom of the closable cavity 2 and enter the base 1 for accommodation. When cleaning is in progress, the indication unit 6 issues a warning to prevent the operator from opening the closable cavity 2; and after cleaning is completed, the indication unit 6 issues a reminder, the operator opens the closable cavity 2, and the main control module 8 controls the self-locking pop-up mechanism 5 to unlock the PCB carrier 4, and pops the PCB carrier 4 out along the guide track 3; thereafter, the user can conveniently take the PCB carrier 4 out of the closable cavity 2. In the cleaning process of the PCB board surface, all dust particles and other debris are limited and collected in the closable cavity 2, and will not overflow into the external dust-free workshop or other environment; it can be seen that the PCB board surface cleaning device of the present invention solves the technical problem of how to reduce the pollution of particulate matter to the dust-free workshop.

[0027] Furthermore, a method for applying the aforementioned PCB surface cleaning device comprises the following steps: S1: the closable cavity 2 is in the open state, the PCB carrier 4 is pre-loaded with a number of PCB workpieces to be cleaned, and then the PCB carrier 4 is pushed into the closable cavity 2 along the corresponding guide track 3, and the side of the PCB carrier 4 abuts against and triggers the self-locking ejection mechanism 5; S2: After the self-locking pop-up mechanism 5 disposed inside the closable cavity 2 senses that the PCB carrier 4 is in place, the PCB carrier 4 is locked and limited under the control of the main control module 8. At this time, the indicating unit 6 sends a locking signal; S3: The closable cavity 2 is closed, the indicating unit 6 sends a warning signal, and the blowing unit 7 disposed on the top of the closable cavity 2 sends air from top to bottom into the PCB carrier 4 to blow and scrape the board surface of each PCB workpiece clean; the dust and other particles blown off enter from the bottom of the closable cavity 2 along the thrust of the airflow and are stored in the base 1; S4: After the blowing and scraping cleaning process is completed, the indicating unit 6 sends a reminder signal, and then the closable cavity 2 is opened, and the main control module 8 controls the self-locking pop-up mechanism 5 to unlock the PCB carrier 4 and pop out the PCB carrier 4 along the corresponding guide track 3; S5: The operator takes the ejected PCB carrier 4 away from the opening of the closable cavity 2 to complete a single PCB surface cleaning process.

[0028] Furthermore, the base 1 has a movable wheel group structure 101 and a pull-out dust collection bin 102; the movable wheel group structure 101 is arranged at the bottom of the closable cavity 2, the pull-out dust collection bin 102 is movably arranged in the movable wheel group structure 101, and the pull-out integrated bin 102 is connected to the closable cavity 2. Specifically, the movable wheel group structure 101 is composed of wheel group units such as pulleys, which can support the closable cavity 2, or can conveniently move the closable cavity 2 to a preset placement position. In addition, the pull-out dust collection bin 102 is a bin-type structure, which can be pushed in or pulled out from the movable wheel group structure 101 like a drawer; its dust collection opening faces upward and is connected to the interior of the closable cavity 2; thereby, dust and other particulate matter inside the closable cavity 2 can be introduced into it.

[0029] Further, the closable cavity 2 has a receiving cavity 201 and an opening and closing structure 202; the opening and closing structure 202 is movably arranged on the side of the receiving cavity 201. Specifically, the user can open or close the opening and closing structure 202 to open or close the closable cavity 2.

[0030] Furthermore, the self-locking pop-up mechanism 5 has a main connecting frame 501, a self-locking module 502 and a pop-up module 503; the main connecting frame 501 is connected to the closable cavity 2, and the main control module 8 is connected to the side of the main connecting frame 501; a plurality of the self-locking modules 502 and a plurality of the pop-up modules 503 are evenly distributed on the main connecting frame 501, and each of the self-locking modules 502 is movably connected to a corresponding pop-up module 503.

[0031] Furthermore, the self-locking module 502 has a self-locking connection frame 502a, an electromagnetic control unit 502b and a position sensor unit 502c; the self-locking connection frame 502a is connected to the main connection frame 501, the electromagnetic control unit 502b is connected to the self-locking connection frame 502a, and the position sensor unit 502c is arranged on the adjacent side of the electromagnetic control unit 502b. Specifically, the electromagnetic control unit 502b and the position sensor unit 502c are both electrically connected to the main control module 8.

[0032] Furthermore, the pop-up module 503 has a pop-up connecting part 503a, a pop-up movable frame 503b, a spring 503c and a locking part 503d; the pop-up connecting part 503a is arranged in the main connecting frame 501, the pop-up movable frame 503b is movably connected to the pop-up connecting part 503a, and the pop-up movable frame 503b is movably connected to the PCB carrier 4; the spring 503c is arranged between the main connecting frame 501 and the pop-up movable frame 503b; the locking part 503d is connected to the pop-up movable frame 503b, and the locking part 503d is movably connected to the electromagnetic control unit 502b.

[0033] Specifically, when the PCB carrier 4 enters the closable cavity 2 along the guide track 3, the side of the PCB carrier 4 gradually abuts against and pushes the pop-up movable frame 503b so that the pop-up movable frame 503b compresses the spring 503c to move along the pop-up connecting portion 503a close to the main connecting frame 501; at the same time, the locking portion 503d also moves together with the pop-up movable frame 503b. Until the position sensing unit 502 senses that the pop-up movable frame 503b moves to a preset position, the locking portion 503d also happens to enter the electromagnetic control unit 502b. At this time, the main control module 8 controls the electromagnetic control unit 502b to move, for example, to generate magnetic force when power is turned on to adsorb and connect the locking portion 503d made of magnetic metal therein. When the PCB carrier 4 needs to be ejected, the main control module 8 controls the corresponding electromagnetic control unit 502b to operate, such as cutting off the power. At this time, the electromagnetic control unit 502b loses its magnetism and the locking portion 503d is no longer adsorbed and connected; and the spring 503c returns to its initial state due to the compression state, so as to use the elastic force to push the ejection movable frame 503b and thus the PCB carrier 4 is ejected along the guide track 3.

[0034] Furthermore, the indication unit 6 has a plurality of indicator light units 601; the indicator light units 601 are electrically connected to the main control module 8, so that yellow, red, green and other colored lights can be emitted as needed to indicate locking signals, warning signals and reminder signals, etc. respectively.

[0035] Furthermore, in a specific embodiment, the blowing unit 7 has an air duct structure 701, a box structure 702 and a blower 703; the air duct structure 701 is arranged on the top of the box structure 702, and the box structure 702 is arranged on the closable cavity 2; the box structure 702 is connected to the inner cavity of the closable cavity 2, and the blower 703 is arranged in the box structure 702. Specifically, the air duct structure 701 can introduce external airflow into the closable cavity 2, and the blower 703 can also generate airflow into the closable cavity 2.

[0036] In summary, a PCB surface cleaning device of the present invention is respectively provided with a base 1, a closable cavity 2, a guide rail 3, a PCB carrier 4, a self-locking pop-up mechanism 5, an indication unit 6, a blowing unit 7 and a main control module 8; the closable cavity 2 is arranged on the base 1, and a plurality of the guide rails 3 are evenly arranged in the closable cavity 2, and each of the guide rails 3 is movably connected to a corresponding PCB carrier 4; the self-locking pop-up mechanism 5 is arranged on the inner side surface of the closable cavity 2, and the self-locking pop-up mechanism 5 is movably connected to each of the PCB carriers 4; the indication unit 6 is arranged on the outer side surface of the closable cavity 2, and the blowing unit 7 is arranged on the top of the closable cavity 2; the main control module 8 is arranged in the closable cavity 2, and the main control module 8 is controlled and connected to the self-locking pop-up mechanism 5, the indication unit 6 and the blowing unit 7 respectively. In the cleaning process of the PCB board surface, all dust particles and other debris are limited and collected in the closable cavity 2, and will not overflow into the external dust-free workshop and other environments. Therefore, the PCB board surface cleaning device of the present invention solves the technical problem of how to reduce the pollution of particulate matter to the dust-free workshop.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] 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 PCB surface cleaning device, characterized in that: It includes: A base (1), a closable cavity (2), a guide rail (3), a PCB carrier (4), a self-locking pop-up mechanism (5), an indication unit (6), a blowing unit (7) and a main control module (8); the closable cavity (2) is arranged on the base (1); a plurality of guide rails (3) are evenly arranged in the closable cavity (2); each guide rail (3) is movably connected to a PCB carrier (4); the self-locking pop-up mechanism (5) is arranged on the closable cavity (2); The self-locking pop-up mechanism (5) is movably connected to each of the PCB carriers (4) on the inner side of the closable cavity (2); the indicating unit (6) is arranged on the outer side of the closable cavity (2); the blowing unit (7) is arranged on the top of the closable cavity (2); the main control module (8) is arranged in the closable cavity (2); the main control module (8) is controllably connected to the self-locking pop-up mechanism (5), the indicating unit (6) and the blowing unit (7).

2. A PCB surface cleaning device according to claim 1, characterized in that: The base (1) comprises a movable wheel group structure (101) and a pull-out dust collecting bin (102); the movable wheel group structure (101) is arranged at the bottom of the closable cavity (2), the pull-out dust collecting bin (102) is movably arranged in the movable wheel group structure (101), and the pull-out integrated bin (102) is connected to the closable cavity (2).

3. A PCB surface cleaning device according to claim 2, characterized in that: The self-locking ejection mechanism (5) comprises a main connection frame (501), a self-locking module (502) and an ejection module (503).

4. A PCB surface cleaning device according to claim 3, characterized in that: The main connection frame (501) is connected to the closable cavity (2), and the main control module (8) is connected to the side of the main connection frame (501); a plurality of the self-locking modules (502) and a plurality of the pop-up modules (503) are evenly distributed on the main connection frame (501), and each of the self-locking modules (502) is movably connected to a corresponding pop-up module (503).

5. A PCB surface cleaning device according to claim 4, characterized in that: The self-locking module (502) comprises a self-locking connection frame (502a), an electromagnetic control unit (502b) and a position sensing unit (502c).

6. A PCB surface cleaning device according to claim 5, characterized in that: The self-locking connection frame (502a) is connected to the main connection frame (501), the electromagnetic control unit (502b) is connected to the self-locking connection frame (502a), and the position sensor unit (502c) is arranged on the adjacent side of the electromagnetic control unit (502b).

7. A PCB surface cleaning device according to claim 6, characterized in that: The pop-up module (503) comprises a pop-up connecting portion (503a), a pop-up moving frame (503b), a spring (503c) and a locking portion (503d).

8. A PCB surface cleaning device according to claim 7, characterized in that: The pop-up connection part (503a) is arranged in the main connection frame (501), the pop-up movable frame (503b) is movably connected to the pop-up connection part (503a), and the pop-up movable frame (503b) is movably connected to the PCB carrier (4).

9. A PCB surface cleaning device according to claim 8, characterized in that: The spring (503c) is arranged between the main connection frame (501) and the pop-up movable frame (503b); the locking portion (503d) is connected to the pop-up movable frame (503b), and the locking portion (503d) is movably connected to the electromagnetic control unit (502b).

10. A method for using a PCB surface cleaning device as described in any one of claims 1 to 9, characterized in that: It includes the following steps: S1: the closable cavity (2) is in an open state, the PCB carrier (4) is pre-loaded with a number of PCB workpieces to be cleaned, and then the PCB carrier (4) is pushed into the closable cavity (2) along the corresponding guide track (3), and the side surface of the PCB carrier (4) is abutted against and actuates the self-locking ejection mechanism (5); S2: After the self-locking ejection mechanism (5) disposed inside the closable cavity (2) senses that the PCB carrier (4) is in place, the PCB carrier (4) is locked and limited under the control of the main control module (8), and at this time, the indicating unit (6) sends a locking signal; S3: the closable cavity (2) is closed, the indicating unit (6) sends a warning signal, and the blowing unit (7) disposed at the top of the closable cavity (2) sends air from top to bottom into the PCB carrier (4) to clean the surface of each PCB workpiece by blowing and scraping; the dust and other particles blown off follow the thrust of the airflow and enter from the bottom of the closable cavity (2) and are stored in the base (1); S4: After the blowing and scraping cleaning process is completed, the indicating unit (6) sends out a reminder signal, after which the closable cavity (2) is opened, and the main control module (8) controls the self-locking pop-up mechanism (5) to unlock the PCB carrier (4), and pops out the PCB carrier (4) along its corresponding guide track (3); S5: The operator takes the ejected PCB carrier (4) away from the opening of the closable cavity (2) to complete a single PCB surface cleaning process.

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