A double-sided cleaning device for electronic PCB detection

Abstract

The utility model discloses a double -faced cleaning device of electronic PCB board detection, including electric conveyer belt, the upper and lower surface of electric conveyer belt all is provided with the placement groove for placing PCB board, and the upper and lower end of PCB board all is provided with fan, and one side of one of fan is provided with the press stick piece, the press stick piece includes connecting rod and press stick, and one end of connecting rod sets up press stick, and the outer surface of press stick is rolling connection with the upper surface of PCB board. The utility model starts electric conveyer belt and places PCB board in the placement groove, and after moving to between two fans, will be the dust impurity of fan clean surface, compares traditional brush cleaning, can avoid scratching to PCB board surface, and at the same time will not produce static electricity to PCB board friction, the upper and lower end of PCB board all is provided with ion wind stick, is used for eliminating the static electricity on PCB board surface before cleaning, and at the same time with the dust catcher two combination avoids dust again being adsorbed by PCB board.

Description

Technical Field

[0001] This utility model relates to the field of PCB board cleaning technology, specifically a double-sided cleaning device for electronic PCB board inspection. Background Technology

[0002] Before PCB board inspection, it needs to be cleaned, mainly to remove impurities that may interfere with the process. During the manufacturing process, PCB boards may retain solder slag, dust, oil, and other impurities. If these impurities adhere to the board surface, they may be misidentified as defects or short circuits by the inspection equipment, leading to inaccurate test results. For example, tiny solder slags may be mistaken for short-circuit bridging by optical inspection equipment, affecting the judgment of circuit continuity. Cleaning the PCB board primarily through a cleaning device can improve image clarity during the inspection process.

[0003] For example, the prior art application number CN202121456472.X discloses a double-sided cleaning device for PCB boards, including a base, mounting brackets on the left and right sides of the top surface of the base, a first brush plate and a second brush plate above the base and between the two mounting brackets, the first brush plate being above the second brush plate, a rectangular positioning frame above the base and between the first and second brush plates, the positioning frame being fixedly connected to the mounting brackets, and a sliding groove for the PCB board to pass through being opened inside the positioning frame;

[0004] The existing technology described above, through practical use, mainly cleans the PCB board by driving a conveyor belt to move the PCB board and making contact with the brushes located at the top and bottom of the PCB board. This method of cleaning the PCB board can easily cause friction and scratches on the PCB board surface; at the same time, it will also generate static electricity on the PCB board surface, and the dust and other debris will be re-adsorbed by the PCB board after cleaning, reducing the cleaning effect. Therefore, we have improved the existing technology based on actual usage. Utility Model Content

[0005] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of this section, the abstract and the title of this utility model. Such simplifications or omissions shall not be used to limit the scope of this utility model.

[0006] In view of the problems existing in the above and / or prior art, the present invention is proposed.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A double-sided cleaning device for inspecting electronic PCB boards includes an electric conveyor belt. The upper and lower surfaces of the electric conveyor belt are provided with placement grooves for placing PCB boards. Fans are provided at the upper and lower ends of the PCB boards. A pressure roller is provided on one side of one of the fans. The pressure roller includes a connecting rod and a pressure roller. The pressure roller is provided at one end of the connecting rod. The outer surface of the pressure roller is in rolling connection with the upper surface of the PCB board.

[0009] Preferably, the base of the electric conveyor belt is fixed with an upright plate, a control plate is provided on one side of the upright plate, and the top wall and inner wall of the upright plate are fixed with bolts and a fan.

[0010] Preferably, an ion bar is fixed to the left side of each of the two fans.

[0011] Preferably, a connecting ring is fitted onto the fixing rod of the ion air bar located at the upper end of the PCB board. A screw is threaded onto the connecting ring, and one end of the screw abuts against the outer surface of the fixing rod of the ion air bar. A connecting rod is integrally formed on the outer surface of the connecting ring.

[0012] Preferably, one end of the connecting rod is rotatably mounted with a pressure roller via a mounting bracket, the connecting rod is inclined, and the pressure roller has a through hole arranged in an annular shape.

[0013] Preferably, a vacuum cleaner is provided on one side of the upright plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Start the electric conveyor belt to place the PCB board in the placement slot. As the PCB board moves between the two fans, the fans will clean the dust and impurities on the surface. Compared with traditional brush cleaning, it can avoid scratching the surface of the PCB board and will not generate static electricity due to friction.

[0016] 2. As the PCB board moves, it will come into contact with the pressure roller. The pressure roller will roll on the upper part of the PCB board, which can apply pressure to stabilize the moving PCB board and prevent the fan from blowing the PCB board off and damaging it, thus increasing the stability and safety of the cleaning process.

[0017] 3. Ionizing air bars are installed at both the top and bottom of the PCB board to eliminate static electricity on the PCB board surface before cleaning, ensuring that the PCB board is free of static electricity after cleaning, avoiding problems caused by static electricity during subsequent testing or operation. At the same time, the vacuum cleaner sucks up the dust blown into the air by the fan. The combination of the two can further prevent dust from being re-adsorbed by the PCB board.

[0018] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.

[0019] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a top view of the present invention;

[0023] Figure 3 This is a front view schematic diagram of the present invention;

[0024] Figure 4 This is a schematic diagram of the pressure roller component of this utility model;

[0025] Figure 5 This utility model Figure 1 Enlarged view of point a in the middle;

[0026] In the diagram: 1. Electric conveyor belt; 2. Placement trough; 3. PCB board; 4. Fan; 5. Pressure roller; 51. Connecting rod; 52. Pressure roller; 53. Connecting ring; 54. Screw; 55. Through hole; 6. Vertical plate; 7. Ionizing air bar; 8. Vacuum cleaner; 9. Control board; Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0030] Furthermore, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0031] Please see Figures 1 to 5 This utility model provides a technical solution: a double-sided cleaning device for electronic PCB board inspection, including an electric conveyor belt 1. The upper and lower surfaces of the electric conveyor belt 1 are provided with placement grooves 2 for placing PCB boards 3. Fans 4 are provided at both the upper and lower ends of the PCB board 3. A pressure roller 5 is provided on one side of one of the fans 4. The pressure roller 5 includes a connecting rod 51 and a pressure roller 52. The pressure roller 52 is located at one end of the connecting rod 51, and its outer surface is in rolling contact with the upper surface of the PCB board 3. It should be noted that the pressure roller 52 is made of sponge or soft rubber with a certain degree of elasticity to avoid excessive pressure damaging the PCB board 3. Cleaning requirements: If used to clean the PCB board 3, the fans 4 need sufficient airflow to blow away surface dust, impurities, etc. Typically, the effective cleaning airflow range for the fans 4 is around 5-20 m / s. For example, for some small dust particles, an airflow of 5-10 m / s may be sufficient to blow them away from the surface of the PCB board 3; while for some tightly attached impurities, an airflow of 10-20 m / s or even higher may be required. However, the wind speed should not be too high, otherwise it may damage some small components on PCB board 3, such as blowing off small surface mount components; the distance between fan 4 and PCB board 3 should be 20-60cm.

[0032] refer to Figure 1 and Figure 3 The electric conveyor belt 1 has a base fixed to a vertical plate 6. A control board 9 is installed on one side of the vertical plate 6. The top and inner walls of the vertical plate 6 are fixed to the fan 4 with bolts. Ionizing rods 7 are fixed to the left side of each of the two fans 4. A vacuum cleaner 8 is installed on one side of the vertical plate 6. The electric conveyor belt 1, fan 4, ionizing rods 7, and vacuum cleaner 8 are electrically connected to and controlled by the control board 9. It should be noted that the distance between the ionizing rod 7 and the PCB board 3 is generally suitable at 20-50 cm. The DC ionizing rod 7 has a high built-in voltage and can eliminate ions up to 1.5 meters away. However, for cleaning the PCB board 3, such a distance is generally not set. Usually, a distance of several tens of centimeters is selected based on the actual situation.

[0033] The vacuum cleaner model 8 is Weider WX75F380V, with the following basic parameters: power 7.5KW, voltage 380V, air volume 530M³ / h. 3 / h, suction power 32Kpa, noise level 73dB, power cord length 5m, filter area 85000cm² 2 Dust collection box capacity 150L, ​​suction port diameter 50mm, machine weight 160kg, machine dimensions 13059173cm;

[0034] refer to Figure 4 and Figure 5 A connecting ring 53 is fitted onto the fixing rod of the ion air bar 7 located at the upper end of the PCB board 3. A screw 54 is threaded onto the connecting ring 53, and one end of the screw 54 abuts against the outer surface of the fixing rod of the ion air bar 7. A connecting rod 51 is integrally formed on the outer surface of the connecting ring 53. One end of the connecting rod 51 is rotatably mounted with a pressure roller 52 via a mounting bracket. The connecting rod 51 is inclined. The angle of the connecting ring 53 can be adjusted by turning the screw 54 to allow the pressure roller 52 to apply pressure to PCB boards 3 of different thicknesses to adapt to different thicknesses.

[0035] The pressure roller 52 has a through hole 55 in the inner ring, which gives the pressure roller 52 a squeezing buffer space. When in contact with the PCB board 3, it can adapt to the force and avoid damage to the circuits in the PCB board 3.

[0036] Working principle: The electric conveyor belt 1 is started to place the PCB board 3 in the placement slot 2. As the PCB board 3 moves between the two fans 4, the dust and impurities on the surface are cleaned by the fans 4. Compared with traditional brush cleaning, it can avoid scratching the surface of the PCB board 3 and will not generate static electricity due to friction on the PCB board 3.

[0037] As the PCB board 3 moves, it will come into contact with the pressure roller 52. The pressure roller 52 will roll on the top of the PCB board 3, which can apply pressure to stabilize the moving PCB board 3 and prevent the fan 4 from blowing the PCB board 3 off and causing damage to the PCB board 3, thus increasing the stability and safety of the cleaning process.

[0038] Ionizing air bars 7 are provided at both the top and bottom of the PCB board 3 to eliminate static electricity on the surface of the PCB board 3 before cleaning, ensuring that the PCB board 3 is free of static electricity after cleaning, and avoiding problems caused by static electricity during subsequent testing or operation. At the same time, the vacuum cleaner 8 sucks up the dust blown into the air by the fan 4. The combination of the two can further prevent the dust from being adsorbed by the PCB board 3 again.

[0039] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0040] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A double-sided cleaning device for electronic PCB inspection, comprising an electric conveyor belt (1), characterized in that: The electric conveyor belt (1) is provided with placement grooves (2) on both the upper and lower surfaces for placing PCB boards (3). Fans (4) are provided at both the upper and lower ends of the PCB board (3). Ionizing rods (7) are fixed on the left side of both fans (4). A pressure roller (5) is provided on one side of one of the fans (4). The pressure roller component (5) includes a connecting rod (51) and a pressure roller (52). One end of the connecting rod (51) is provided with the pressure roller (52), and the outer surface of the pressure roller (52) is rolledly connected to the upper surface of the PCB board (3).

2. The dual-sided cleaning apparatus for electronic PCB inspection of claim 1, wherein: The electric conveyor belt (1) has a base plate (6) fixed on it. A control plate (9) is provided on one side of the base plate (6). The top wall and inner wall of the base plate (6) are fixed by bolts and a fan (4).

3. The dual-sided cleaning apparatus for electronic PCB inspection of claim 1, wherein: A connecting ring (53) is sleeved on the fixing rod of the ion air bar (7) located at the upper end of the PCB board (3). A screw (54) is threaded on the connecting ring (53) and one end of the screw (54) is pressed against the outer surface of the fixing rod of the ion air bar (7). A connecting rod (51) is integrally provided on the outer surface of the connecting ring (53).

4. The dual-sided cleaning apparatus for electronic PCB inspection of claim 3, wherein: One end of the connecting rod (51) is rotatably mounted with a pressure roller (52) via a mounting bracket. The connecting rod (51) is inclined, and the pressure roller (52) has a through hole (55) arranged in annularly inside.

5. The dual-sided cleaning apparatus for electronic PCB inspection of claim 2, wherein: A vacuum cleaner (8) is provided on one side of the upright plate (6).

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