A circuit board waterproof adhesive spraying device

Abstract

This utility model discloses a waterproof adhesive spraying device for circuit boards, relating to the field of circuit board technology. It includes a frame, a rotary drive, a transmission mechanism, multiple positioning fixtures, and multiple spraying mechanisms. The rotary drive is mounted on the frame; multiple positioning fixtures are rotatably connected to the frame and are used to position circuit boards; the input end of the transmission mechanism is connected to the output end of the rotary drive, and the output end is connected to the multiple positioning fixtures. The rotary drive can simultaneously drive the multiple positioning fixtures to rotate via the transmission mechanism, so that each positioning fixture can drive multiple circuit boards to rotate. Multiple spraying mechanisms are mounted on the frame and are respectively configured to correspond to the multiple positioning fixtures. Each spraying mechanism is used to spray waterproof adhesive onto the circuit boards on the positioning fixtures. This waterproof adhesive spraying device, through the rotary drive and transmission mechanism, drives the circuit boards to rotate with the positioning fixtures. Combined with the corresponding spraying mechanisms, this allows the waterproof adhesive to evenly cover the surface of the circuit boards, improving the yield rate of the circuit boards.

Description

Technical Field

[0001] This utility model relates to the field of circuit board technology, and in particular to a circuit board waterproof adhesive spraying device. Background Technology

[0002] A circuit board waterproof adhesive spraying device is used to spray waterproof adhesive onto the surface of a circuit board, covering the surface with a protective adhesive to provide waterproofing, moisture protection, and dust protection, thereby improving the reliability and lifespan of the circuit board. In existing technologies, circuit board waterproof adhesive spraying devices often struggle to evenly spray the waterproof adhesive onto the circuit board surface, easily resulting in areas where the adhesive layer is too thick or too thin, affecting the protective effect of the adhesive and ultimately reducing the yield rate of the circuit board. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a circuit board waterproof adhesive spraying device, which can uniformly spray waterproof adhesive onto the surface of the circuit board, thereby improving the yield rate of the circuit board.

[0004] The circuit board waterproof adhesive spraying device according to an embodiment of the present invention includes a frame, a rotary drive component, a transmission mechanism, multiple positioning fixtures, and multiple spraying mechanisms.

[0005] A rotary drive is mounted on the frame; multiple positioning fixtures are rotatably connected to the frame, and each positioning fixture is used to position a circuit board; the input end of a transmission mechanism is connected to the output end of the rotary drive, and the output end is connected to the multiple positioning fixtures; the rotary drive can simultaneously drive the multiple positioning fixtures to rotate through the transmission mechanism, so that each positioning fixture can drive multiple circuit boards to rotate; multiple spraying mechanisms are mounted on the frame, and each spraying mechanism is correspondingly arranged to the multiple positioning fixtures; the spraying mechanisms are used to spray waterproof adhesive onto the circuit boards on the positioning fixtures.

[0006] It has at least the following beneficial effects:

[0007] When waterproof adhesive needs to be applied to circuit boards, workers can place multiple circuit boards to be coated onto several positioning fixtures. During this process, each positioning fixture precisely positions the circuit boards, ensuring they do not shift during the subsequent coating process and laying the foundation for accurate coating. After placing and positioning the circuit boards, the rotary drive is activated. The output of the rotary drive is connected to the input of the transmission mechanism, and the output of the transmission mechanism is connected to the multiple positioning fixtures. Therefore, the rotary drive transmits power to the transmission mechanism, causing the transmission mechanism to simultaneously drive the multiple positioning fixtures to rotate. As the positioning fixtures rotate, the circuit boards placed on them also rotate synchronously, allowing all areas of the circuit board's surface to be exposed within the coating range. Simultaneously with the rotation of the circuit boards by the positioning fixtures, multiple coating mechanisms are activated. Because each coating mechanism corresponds to a different positioning fixture, each coating mechanism specifically applies waterproof adhesive to the rotating circuit board on its corresponding positioning fixture. Throughout the spraying process, the circuit board continuously rotates while the spraying mechanism continuously sprays waterproof adhesive, ensuring that the adhesive evenly covers the surface of the circuit board. After spraying is complete, the rotary drive and spraying mechanism are shut off. Once the adhesive on the circuit board surface has slightly solidified, the worker can remove the sprayed circuit board from the positioning fixture, completing the waterproof adhesive spraying process. This circuit board waterproof adhesive spraying device uses a rotary drive and transmission mechanism to rotate the circuit board along with the positioning fixture. Combined with the corresponding spraying mechanism, this ensures that the waterproof adhesive evenly covers the circuit board surface, effectively preventing uneven adhesive thickness, improving the protective effect of the adhesive, and thus increasing the yield rate of the circuit boards.

[0008] According to the circuit board waterproof adhesive spraying device of this utility model embodiment, the transmission mechanism includes a drive shaft, multiple first driven shafts, and multiple transmission components. The lower end of the drive shaft is rotatably connected to the frame and is connected to the output end of the rotary drive component. The lower ends of the multiple first driven shafts are all rotatably connected to the frame. The drive shaft is provided with a drive gear, and each of the multiple first driven shafts is provided with a driven gear. The drive gear meshes with the multiple driven gears simultaneously. The multiple first driven shafts are respectively connected to multiple positioning fixtures through the transmission components. When the rotary drive component drives the drive shaft and the drive gear to rotate, the multiple driven gears respectively drive the multiple first driven shafts to rotate, so that the multiple first driven shafts respectively drive the multiple positioning fixtures to rotate through the transmission components.

[0009] According to the circuit board waterproof adhesive spraying device of the present utility model embodiment, the transmission component includes a second driven shaft, a first pulley, a second pulley and a belt. The lower end of the second driven shaft is rotatably connected to the frame, and the upper end of the second driven shaft is connected to the positioning fixture. The first pulley and the second pulley are respectively connected to the first driven shaft and the second driven shaft, and the belt is wound around the first pulley and the second pulley.

[0010] According to an embodiment of the present invention, the circuit board waterproof adhesive spraying device includes a first nozzle, which is disposed above the positioning fixture. The first nozzle is used to spray waterproof adhesive onto the circuit board on the positioning fixture from top to bottom.

[0011] According to the circuit board waterproof adhesive spraying device of the present utility model embodiment, the spraying mechanism further includes a second nozzle, which is disposed between the positioning fixture and the first nozzle. The second nozzle is inclined and is used to spray waterproof adhesive onto the circuit board on the positioning fixture at an angle downward.

[0012] The circuit board waterproof adhesive spraying device according to an embodiment of the present utility model further includes a cover, which is disposed on the frame and has a material discharge port. The rotary drive, the transmission mechanism, the plurality of positioning fixtures and the plurality of spraying mechanisms are all disposed inside the cover.

[0013] The circuit board waterproof adhesive spraying device according to an embodiment of the present utility model further includes a cover plate, which is hinged to the housing and is used to cover or open the discharge port.

[0014] According to the circuit board waterproof adhesive spraying device of the present utility model embodiment, the positioning fixture includes a support plate and multiple limiting blocks. The support plate is rotatably connected to the frame, and the multiple limiting blocks are all disposed on the support plate. The area enclosed by the upper surface of the support plate and the multiple limiting blocks is used to accommodate the circuit board.

[0015] The circuit board waterproof adhesive spraying device according to an embodiment of the present utility model further includes a material shortage detection mechanism, which is disposed on the frame and electrically connected to a plurality of spraying mechanisms. The material shortage detection mechanism is used to detect circuit boards on a plurality of positioning fixtures.

[0016] The circuit board waterproof adhesive spraying device according to an embodiment of the present utility model further includes a protective cover, which is disposed on the frame, and the rotary drive component is disposed inside the protective cover.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 This is a schematic diagram of the circuit board structure;

[0020] Figure 2 This is a schematic diagram of a circuit board waterproof adhesive spraying device;

[0021] Figure 3 This is a schematic diagram of the internal structure of a circuit board waterproof adhesive spraying device;

[0022] Figure 4 yes Figure 3 A magnified view of a section at point A in the middle;

[0023] Figure 5 This is a structural diagram of the positioning fixture, transmission mechanism, material shortage detection mechanism, and protective cover;

[0024] Figure 6 yes Figure 5 A magnified view of a section at point B in the middle;

[0025] Figure 7 This is a structural diagram of the positioning fixture, transmission mechanism, material shortage detection mechanism, and rotary drive component;

[0026] Icon labels:

[0027] Positioning fixture 100; support plate 110; limiting block 120;

[0028] Rotary drive component 200; Protective cover 210;

[0029] Transmission mechanism 300; first driven shaft 310; first pulley 311; driven gear 312; second driven shaft 320; second pulley 321; drive shaft 330; drive gear 331; belt 340;

[0030] Spraying mechanism 400; first spray head 410; second spray head 420; vision camera 430;

[0031] Material shortage detection mechanism 500; mounting plate 510; sensor 520;

[0032] Frame 600; cover 610; discharge port 620. Detailed Implementation

[0033] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0035] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0036] refer to Figure 2 , Figure 3 , Figure 4 and Figure 7 This utility model discloses a circuit board waterproof adhesive spraying device, including a frame 600, a rotary drive 200, a transmission mechanism 300, multiple positioning fixtures 100, and multiple spraying mechanisms 400. The rotary drive 200 is mounted on the frame 600; the multiple positioning fixtures 100 are rotatably connected to the frame 600 and are used to position circuit boards; the input end of the transmission mechanism 300 is connected to the output end of the rotary drive 200, and the output end is connected to the multiple positioning fixtures 100. The rotary drive 200 can simultaneously drive the multiple positioning fixtures 100 to rotate through the transmission mechanism 300, so that the multiple positioning fixtures 100 can drive multiple circuit boards to rotate respectively; the multiple spraying mechanisms 400 are mounted on the frame 600 and are respectively arranged corresponding to the multiple positioning fixtures 100. The spraying mechanisms 400 are used to spray waterproof adhesive onto the circuit boards on the positioning fixtures 100.

[0037] In this embodiment of the utility model, multiple spraying mechanisms 400 are respectively configured to correspond to multiple positioning fixtures 100, that is, the spraying mechanism 400 can spray waterproof adhesive onto the circuit board of the positioning fixture 100 configured to correspond to it.

[0038] Understandably, when waterproof adhesive needs to be sprayed onto circuit boards, workers can place multiple circuit boards to be sprayed onto several positioning fixtures 100. During this process, each positioning fixture 100 precisely positions the circuit board on it, ensuring that the circuit board will not shift during subsequent spraying, thus laying the foundation for spraying accuracy. After the placement and positioning of multiple circuit boards are completed, the rotary drive 200 is activated. The output end of the rotary drive 200 is connected to the input end of the transmission mechanism 300, and the output end of the transmission mechanism 300 is connected to the multiple positioning fixtures 100. Therefore, after the rotary drive 200 is activated, it transmits power to the transmission mechanism 300, causing the transmission mechanism 300 to simultaneously drive the multiple positioning fixtures 100 to rotate. As the positioning fixtures 100 rotate, the circuit boards placed on them also rotate synchronously, allowing all parts of the circuit board's surface to be exposed within the spraying range. Simultaneously with the positioning fixtures 100 driving the circuit boards to rotate, multiple spraying mechanisms 400 are activated. Because multiple spraying mechanisms 400 are respectively set up with multiple positioning fixtures 100, each spraying mechanism 400 will specifically spray waterproof adhesive onto the rotating circuit board on its corresponding positioning fixture 100. Throughout the spraying process, since the circuit board is continuously rotating, the spraying mechanism 400 continuously sprays waterproof adhesive, ensuring that the waterproof adhesive can evenly cover the surface of the circuit board. After spraying is completed, the rotary drive 200 and the spraying mechanism 400 are turned off. After the waterproof adhesive on the circuit board surface has slightly solidified, the worker can remove the sprayed circuit board from the positioning fixture 100, completing the waterproof adhesive spraying work for the entire circuit board. This circuit board waterproof adhesive spraying device, through the rotary drive 200 and transmission mechanism 300, drives the circuit board to rotate with the positioning fixture 100. Combined with the corresponding spraying mechanism 400, this ensures that the waterproof adhesive evenly covers the surface of the circuit board, effectively avoiding uneven adhesive thickness, improving the protective effect of the adhesive, and thus contributing to a higher yield rate for the circuit board.

[0039] refer to Figures 4 to 6The positioning fixture 100 includes a support plate 110 and multiple limiting blocks 120. The support plate 110 is rotatably connected to the frame 600, and the multiple limiting blocks 120 are all disposed on the support plate 110. The area enclosed by the upper surface of the support plate 110 and the multiple limiting blocks 120 is used to accommodate the circuit board. It can be understood that by using the upper surface of the support plate 110 as a load-bearing base, the multiple limiting blocks 120 enclose a receiving area on the support plate 110 that conforms to the shape of the circuit board. When the circuit board is placed therein, the limiting blocks 120 block the circuit board from all sides, restricting its horizontal displacement, thereby achieving precise positioning of the circuit board. As one embodiment of this utility model, the multiple limiting blocks 120 are movably connected to the support plate 110 by means of oblong bolts, allowing the size of the upper surface of the support plate 110 and the area enclosed by the multiple limiting blocks 120 to be adjusted to accommodate circuit boards of different specifications.

[0040] refer to Figure 3 and Figure 4 The spraying mechanism 400 includes a first nozzle 410, which is positioned above the positioning fixture 100. The first nozzle 410 is used to spray waterproof adhesive onto the circuit board on the positioning fixture 100 from top to bottom. The spraying mechanism 400 also includes a second nozzle 420, which is positioned between the positioning fixture 100 and the first nozzle 410. The second nozzle 420 is inclined and is used to spray waterproof adhesive onto the circuit board on the positioning fixture 100 at an angle downwards. It can be understood that the spraying mechanism 400, with its first nozzle 410 and second nozzle 420, can significantly improve the uniformity and comprehensiveness of the waterproof adhesive coverage on the circuit board surface. The first nozzle 410 is positioned above the positioning fixture 100 and can spray the rotating circuit board from top to bottom, ensuring that the top surface and upward-facing areas of the circuit board are evenly covered with waterproof adhesive. The second nozzle 420 is angled between the positioning fixture 100 and the first nozzle 410, and its downward spraying direction allows for targeted supplementary spraying of areas that the first nozzle 410 may not reach or adequately cover, such as the sides and corners of the circuit board. This dual-nozzle design effectively avoids spraying dead spots or uneven adhesive thickness on the circuit board surface, further enhancing the protective effect of the waterproof adhesive, thereby better ensuring the reliability and lifespan of the circuit board and improving product yield.

[0041] In this embodiment of the invention, the spraying mechanism 400 further includes a storage tank for storing waterproof adhesive, a delivery pump, and a delivery pipeline. During spraying, the waterproof adhesive in the storage tank enters the delivery pump via the delivery pipeline. After the delivery pump starts, it pressurizes the waterproof adhesive and then delivers it to the first nozzle 410 and the second nozzle 420 via the delivery pipeline. The first nozzle 410 and the second nozzle 420 precisely spray the waterproof adhesive onto the rotating circuit board at corresponding positions and in a set direction to achieve the spraying of the waterproof adhesive. The storage tank, delivery pump, and delivery pipeline are all common components in the field of adhesive spraying and will not be described further here. (Reference) Figure 4 The spraying mechanism 400 also includes a vision camera 430. The vision camera 430 is used to capture images of the circuit board on the positioning fixture 100 from above and to process the captured images for real-time monitoring and feedback of the spraying effect. Further details are omitted here. The vision camera 430 is a common industrial camera, and further details are omitted here.

[0042] refer to Figures 5 to 7 The transmission mechanism 300 includes a drive shaft 330, multiple first driven shafts 310, and multiple transmission components. The lower end of the drive shaft 330 is rotatably connected to the frame 600 and is connected to the output end of the rotary drive 200. The lower ends of the multiple first driven shafts 310 are all rotatably connected to the frame 600. The drive shaft 330 is provided with a drive gear 331, and the multiple first driven shafts 310 are provided with driven gears 312. The drive gear 331 meshes with the multiple driven gears 312 simultaneously. The multiple first driven shafts 310 are all connected to multiple positioning fixtures 100 through the transmission components. When the rotary drive 200 drives the drive shaft 330 and the drive gear 331 to rotate, the multiple driven gears 312 drive the multiple first driven shafts 310 to rotate, so that the multiple first driven shafts 310 drive the multiple positioning fixtures 100 to rotate through the transmission components. The transmission assembly includes a second driven shaft 320, a first pulley 311, a second pulley 321, and a belt 340. The lower end of the second driven shaft 320 is rotatably connected to the frame 600, and the upper end of the second driven shaft 320 is connected to the positioning fixture 100. The first pulley 311 and the second pulley 321 are respectively connected to the first driven shaft 310 and the second driven shaft 320. The belt 340 is wound around the first pulley 311 and the second pulley 321.

[0043] Understandably, multiple transmission components are respectively configured to correspond to multiple first driven shafts 310. Each transmission component includes a second driven shaft 320, a first pulley 311, a second pulley 321, and a belt 340. When the rotary drive 200 is activated, its output end drives the connected drive shaft 330 to rotate. Since the lower end of the drive shaft 330 is rotatably connected to the frame 600, the drive shaft 330 can rotate stably. Simultaneously, the drive gear 331 on the drive shaft 330 rotates together. The drive gear 331 meshes with the driven gears 312 on the multiple first driven shafts 310. Driven by the drive gear 331, the multiple driven gears 312 respectively drive the corresponding first driven shafts 310 to rotate, and the lower ends of these first driven shafts 310 are all rotatably connected to the frame 600, ensuring the stability of the rotation. Each first driven shaft 310 is connected to a first pulley 311. A second driven shaft 320, corresponding to the first driven shaft 310, is rotatably connected at its lower end to the frame 600 and at its upper end to the positioning fixture 100. The second driven shaft 320 is also equipped with a second pulley 321, and a belt 340 is wound around the corresponding first pulley 311 and second pulley 321. When the first driven shaft 310 rotates, the first pulley 311 drives the corresponding second pulley 321 to rotate via the belt 340. This causes the second pulley 321 to drive the second driven shaft 320 to rotate, which in turn causes the positioning fixture 100 connected to its upper end to rotate, thus enabling the circuit board on the positioning fixture 100 to rotate. This, in conjunction with the spraying mechanism 400, completes the spraying process.

[0044] In this embodiment of the invention, multiple first driven shafts 310 are circumferentially distributed around the axis of the drive shaft 330, and multiple second driven shafts 320 are all disposed outside the multiple first driven shafts 310, and are circumferentially distributed around the axis of the drive shaft 330. In this embodiment of the invention, the drive shaft 330, the first driven shafts 310, and the second driven shafts 320 are all rotatably connected to the frame 600 by bearings, which will not be further described here.

[0045] refer to Figure 2 and Figure 3The circuit board waterproof adhesive spraying device also includes a housing 610, which is mounted on the frame 600. The housing 610 has a discharge port 620. The rotary drive 200, transmission mechanism 300, multiple positioning fixtures 100, and multiple spraying mechanisms 400 are all housed within the housing 610. The circuit board waterproof adhesive spraying device also includes a cover plate (not shown in the figure), which is hinged to the housing 610 and is used to cover or open the discharge port 620. It is understood that the housing 610 houses the rotary drive 200, transmission mechanism 300, positioning fixtures 100, and spraying mechanisms 400, preventing the waterproof adhesive from splashing onto the outside and causing contamination during spraying, and also preventing external dust and other impurities from entering and affecting the spraying quality. The hinged cover can cover or open the discharge port 620. When picking up or placing circuit boards, the cover can open the discharge port 620 to facilitate workers placing the circuit boards on the positioning fixture 100 and to facilitate workers removing the coated circuit boards from the positioning fixture 100, thus simplifying operations. During the coating process, the cover can cover the discharge port 620 to ensure a clean environment during device operation. In this embodiment, one end of the cover is hinged to the housing 610, and the other end of the cover is provided with a common locking assembly, which can fix the other end of the cover to the housing 610. Further details are omitted here. In this embodiment, both the first nozzle 410 and the second nozzle 420 are connected to the inner wall of the housing 610.

[0046] refer to Figure 3 and Figure 5 The circuit board waterproof adhesive spraying device also includes a protective cover 210, which is mounted on the frame 600, and the rotary drive component 200 is housed inside the protective cover 210. It is understood that the protective cover 210 effectively protects the rotary drive component 200 from the influence of dust, moisture, and waterproof adhesive splashes from the external environment during operation, thereby ensuring stable operation and extending its service life. In this embodiment of the invention, the rotary drive component 200 is a common motor, and the output end of the motor is connected to the lower end of the drive shaft 330.

[0047] refer to Figures 5 to 7The circuit board waterproof adhesive spraying device also includes a material shortage detection mechanism 500, which is mounted on the frame 600 and electrically connected to multiple spraying mechanisms 400. The material shortage detection mechanism 500 is used to detect circuit boards on multiple positioning fixtures 100. Understandably, when the material shortage detection mechanism 500 detects that no circuit board is placed on a certain positioning fixture 100, because it is electrically connected to multiple spraying mechanisms 400, it will promptly send a signal to prevent the corresponding spraying mechanism 400 from starting, thus avoiding dry spraying when there is no circuit board, thereby saving waterproof adhesive material and reducing unnecessary material waste. In this embodiment of the invention, the material shortage detection mechanism 500 includes multiple sensors 520, a signal processing module, and a control module. Each sensor 520 is correspondingly assigned to one of multiple positioning fixtures 100, and is used to directly detect whether a circuit board is placed on the corresponding positioning fixture 100. The signal processing module is electrically connected to the multiple sensors 520 and is responsible for receiving and processing the detection signals transmitted from the sensors 520. The control module is electrically connected to both the signal processing module and multiple spraying mechanisms 400, and is used to control the start and stop of the spraying mechanisms 400 according to the processed signals. During operation, each sensor 520 continuously detects its corresponding positioning fixture 100. When a circuit board is placed on the positioning fixture 100, the sensor 520 generates a material presence signal and transmits it to the signal processing module; if no circuit board is on the positioning fixture 100, the sensor 520 generates a material shortage signal and sends it to the signal processing module. After analyzing and processing the received signals, the signal processing module transmits the processing result to the control module. When the control module receives a processing result corresponding to a material presence signal, it controls the spraying mechanism 400 corresponding to the positioning fixture 100 to start normally; when it receives a processing result corresponding to a material absence signal, it controls the corresponding spraying mechanism 400 to remain closed and not perform spraying operations. The sensor 520 can be a common photoelectric sensor 520, which determines the presence of material by emitting a light beam and receiving the light reflected from the circuit board; further details are omitted here. The material shortage detection mechanism 500 is a common workpiece material shortage detection mechanism 500; further details are omitted here.

[0048] In this embodiment of the utility model, the material shortage detection mechanism 500 further includes a mounting plate 510, which is connected to the upper end of the drive shaft 330. Multiple sensors 520 are circumferentially distributed on the mounting plate 510 around the axis of the drive shaft 330. When the rotary drive 200 is not started, the multiple sensors 520 can be respectively set with multiple positioning fixtures 100. When the rotary drive 200 is started, the mounting plate 510 and the multiple sensors 520 rotate, which will not be further described here.

[0049] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0050] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A circuit board waterproof adhesive spraying device, characterized by, include: Rack (600); A rotary drive (200) is mounted on the frame (600); Multiple positioning fixtures (100) are rotatably connected to the frame (600), and the multiple positioning fixtures (100) are used to position the circuit board; The transmission mechanism (300) has its input end connected to the output end of the rotary drive (200) and its output end connected to multiple positioning fixtures (100). The rotary drive (200) can simultaneously drive multiple positioning fixtures (100) to rotate through the transmission mechanism (300), so that the multiple positioning fixtures (100) can drive multiple circuit boards to rotate respectively. Multiple spraying mechanisms (400) are all mounted on the frame (600). The multiple spraying mechanisms (400) are respectively configured to correspond to the multiple positioning fixtures (100). The spraying mechanism (400) is used to spray waterproof adhesive onto the circuit board on the positioning fixture (100).

2. The circuit board waterproof adhesive spraying device according to claim 1, characterized in that: The transmission mechanism (300) includes a drive shaft (330), multiple first driven shafts (310), and multiple transmission components. The lower end of the drive shaft (330) is rotatably connected to the frame (600), and the lower end of the drive shaft (330) is connected to the output end of the rotary drive (200). The lower ends of the multiple first driven shafts (310) are all rotatably connected to the frame (600). The drive shaft (330) is provided with a drive gear (331), and each of the multiple first driven shafts (310) is provided with a driven gear (312). The driving gear (331) meshes with multiple driven gears (312) simultaneously. Multiple first driven shafts (310) are connected to multiple positioning fixtures (100) via the transmission assembly. When the rotary drive (200) drives the driving shaft (330) and the driving gear (331) to rotate, the multiple driven gears (312) drive the multiple first driven shafts (310) to rotate, so that the multiple first driven shafts (310) drive the multiple positioning fixtures (100) to rotate via the transmission assembly.

3. The circuit board waterproof adhesive spraying device according to claim 2, characterized in that: The transmission assembly includes a second driven shaft (320), a first pulley (311), a second pulley (321), and a belt (340). The lower end of the second driven shaft (320) is rotatably connected to the frame (600), and the upper end of the second driven shaft (320) is connected to the positioning fixture (100). The first pulley (311) and the second pulley (321) are respectively connected to the first driven shaft (310) and the second driven shaft (320), and the belt (340) is wound around the first pulley (311) and the second pulley (321).

4. The circuit board waterproof adhesive spraying device according to claim 1, characterized in that: The spraying mechanism (400) includes a first nozzle (410) which is located above the positioning fixture (100). The first nozzle (410) is used to spray waterproof adhesive onto the circuit board on the positioning fixture (100) from top to bottom.

5. The circuit board waterproof adhesive spraying device according to claim 4, characterized in that: The spraying mechanism (400) further includes a second spray head (420), which is disposed between the positioning fixture (100) and the first spray head (410). The second spray head (420) is inclined and is used to spray waterproof adhesive onto the circuit board on the positioning fixture (100) at an angle downward.

6. The circuit board waterproof adhesive spraying device according to claim 1, characterized in that: It also includes a cover (610), which is disposed on the frame (600). The cover (610) is provided with a material discharge port (620). The rotary drive (200), the transmission mechanism (300), the plurality of positioning fixtures (100) and the plurality of spraying mechanisms (400) are all disposed inside the cover (610).

7. The circuit board waterproof adhesive spraying device according to claim 6, characterized in that: It also includes a cover plate hinged to the housing (610) for covering or opening the discharge port (620).

8. The circuit board waterproof adhesive spraying device according to claim 1, characterized in that: The positioning fixture (100) includes a support plate (110) and multiple limiting blocks (120). The support plate (110) is rotatably connected to the frame (600). The multiple limiting blocks (120) are all disposed on the support plate (110). The area enclosed by the upper surface of the support plate (110) and the multiple limiting blocks (120) is used to accommodate the circuit board.

9. The circuit board waterproof adhesive spraying device according to claim 1, characterized in that: It also includes a material shortage detection mechanism (500), which is mounted on the frame (600) and electrically connected to multiple spraying mechanisms (400). The material shortage detection mechanism (500) is used to detect circuit boards on multiple positioning fixtures (100).

10. The circuit board waterproof adhesive spraying device according to claim 1, characterized in that: It also includes a protective cover (210), which is disposed on the frame (600), and the rotary drive (200) is disposed inside the protective cover (210).

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