A hot air machine circuit board convenient to disassemble

Abstract

The utility model discloses a hot -blast machine circuit board convenient to dismantle, including hot -blast machine circuit board, connecting mechanism and fixed plate, all be equipped with through -hole in the four corners of hot -blast machine circuit board, and all insert installation have connecting mechanism in four through -holes, and fixed plate is installed in the outside hot -blast machine, and connecting mechanism is connected with fixed plate, and connecting mechanism includes inserting rod, limit ring, nut, annular groove and rubber ring, and the lower wall inserting rod inserts and installs in the through -hole, and the outside installing of inserting rod is equipped with limit ring, and the outside installing of nut is in inserting rod, and the lateral wall of inserting rod is equipped with annular groove, and rubber ring is located in annular groove, and the hot -blast machine circuit board in this device is installed through the cooperation of inserting rod and connecting cylinder, makes it when disassembling, only needs to push away after the support plate outward, can pull down hot -blast machine circuit board from fixed plate, very convenient, and setting up support plate can make hot -blast machine circuit board more stable, avoids the situation of falling.

Description

Technical Field

[0001] This utility model relates to the field of circuit board technology, specifically to a hot air blower circuit board that is easy to disassemble. Background Technology

[0002] In the production and maintenance of hot air blowers, the installation and removal of circuit boards are frequent operations. Currently, traditional hot air blower circuit boards are usually installed inside the equipment by directly fixing them with bolts, which has many inconveniences in actual use.

[0003] When circuit boards need to be repaired or replaced, operators must use specific tools to unscrew the fixing bolts one by one. The operation is cumbersome and time-consuming. In addition, the bolts and threaded holes are prone to wear during repeated disassembly, which can lead to loose connections and affect the installation stability of the circuit board.

[0004] Furthermore, traditional mounting methods lack effective buffering and limiting structures, allowing vibrations generated by the hot air blower during operation to be easily transmitted to the circuit board. Prolonged use may cause components on the circuit board to loosen or fall off, affecting the normal operation of the hot air blower and reducing its lifespan. Simultaneously, the rigid connection between the circuit board and the mounting plate may also damage the circuit board itself during vibration, increasing maintenance costs. Utility Model Content

[0005] The purpose of this invention is to provide a hot air blower circuit board that is easy to disassemble, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hot air blower circuit board that is easy to disassemble, comprising a hot air blower circuit board, a connecting mechanism and a fixing plate, wherein through holes are provided at the four corners of the hot air blower circuit board, and a connecting mechanism is inserted into each of the four through holes; the fixing plate is installed inside an external hot air blower, and the connecting mechanism is connected to the fixing plate.

[0007] The connecting mechanism includes a plug rod, a limiting ring, a nut, an annular groove, and a rubber ring. The lower wall of the plug rod is inserted into the through hole. The limiting ring is installed on the outer side of the plug rod and fits against the side wall of the hot air blower circuit board. The end of the plug rod is threaded. The nut is screwed onto the outside of the plug rod. The side wall of the plug rod has an annular groove. The rubber ring is sleeved on the outside of the plug rod and is located inside the annular groove.

[0008] Connecting cylinders are installed at each of the four corners of the fixing plate. The insert rod can be inserted into the connecting cylinder. The inner side wall of the connecting cylinder has a slot, and the rubber ring can be inserted into the slot.

[0009] Preferably, fixing blocks are installed on both the left and right sides of the fixing plate, and a sliding groove is provided on the side wall of the fixing block. A slider is slidably installed in the sliding groove, and a support plate is installed on the side wall of the slider. The support plate is located below the hot air blower circuit board and can support the hot air blower circuit board.

[0010] Preferably, a spring is installed in the slide groove, one end of the spring is in contact with the side wall of the slider, and the other end of the spring is in contact with the inner wall of the slide groove.

[0011] Preferably, the sidewall of the support plate is equipped with two locking blocks, which are located on the front and rear sides of the hot air blower circuit board, respectively.

[0012] Preferably, a controller interface is installed on the side wall of the hot air blower circuit board, one end of which is inserted into the controller interface, and the other end of the connecting wire is electrically connected to an external control panel.

[0013] Preferably, a rubber washer is fitted onto the outer side of the insertion rod, and the rubber washer is in contact with the side wall of the connecting cylinder.

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

[0015] This easily detachable hot air blower circuit board achieves quick connection and separation from the fixed plate through a connecting mechanism. For connection, simply insert the plug rod into the connecting cylinder, allowing the rubber ring to engage in the slot for initial fixation, then tighten the nut for stable installation. For disassembly, unscrew the nut and simply pull out the plug rod to remove the circuit board. No complicated tools are required, greatly simplifying the operation process, saving disassembly and assembly time, and improving maintenance and replacement efficiency.

[0016] The rubber ring in the connecting mechanism is located within an annular groove. When the insertion rod is inserted into the connecting cylinder, the rubber ring engages with the groove, effectively preventing the insertion rod from wobbling within the connecting cylinder and enhancing the connection stability between the circuit board and the fixing plate. Simultaneously, the nut, in conjunction with the limiting ring, firmly clamps the circuit board, preventing displacement during equipment operation and ensuring its normal operation. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle.

[0019] Figure 3 This is the circuit diagram of the hot air blower circuit board of this utility model.

[0020] In the diagram: 1. Hot air blower circuit board; 2. Connecting mechanism; 21. Insert rod; 22. Limiting ring; 23. Nut; 24. Annular groove; 25. Rubber ring; 3. Fixing plate; 4. Through hole; 5. Connecting cylinder; 6. Slot; 7. Fixing block; 8. Slide groove; 9. Slider; 10. Support plate; 11. Spring; 12. Locking block; 13. Controller interface; 14. Connecting wire; 15. Rubber washer. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-3 This utility model provides a technical solution: a hot air blower circuit board that is easy to disassemble, including a hot air blower circuit board 1, a connecting mechanism 2, and a fixing plate 3. The hot air blower circuit board 1 has through holes 4 at each of its four corners, and a connecting mechanism 2 is inserted into each of the four through holes 4. The fixing plate 3 is installed inside an external hot air blower, and the connecting mechanism 2 is connected to the fixing plate 3. The connecting mechanism 2 includes a rod 21, a limiting ring 22, a nut 23, an annular groove 24, and a rubber ring 25. The lower wall of the rod 21 is inserted into the through hole 4. A limiting ring 22 is installed on the outer side of the rod 21. The limiting ring 22 fits against the side wall of the hot air blower circuit board 1. The end of the insertion rod 21 is threaded. The nut 23 is screwed on the outside of the insertion rod 21. The side wall of the insertion rod 21 is provided with an annular groove 24. The rubber ring 25 is sleeved on the outside of the insertion rod 21 and is located in the annular groove 24. Connecting cylinders 5 are installed at the four corners of the fixing plate 3. The insertion rod 21 can be inserted into the connecting cylinder 5. The inner side wall of the connecting cylinder 5 is provided with a slot 6. The rubber ring 25 can be inserted into the slot 6.

[0023] The hot air blower circuit board 1 uses an FR-4 epoxy glass cloth substrate, typically 1.6mm thick, and its size can be customized according to the hot air blower model, such as the common 200mm × 150mm. The diameter of the through hole 4 must match the diameter of the insertion rod 21 in the connecting mechanism 2. Generally, the diameter of the insertion rod 21 is 4mm, and the diameter of the through hole 4 is 4.2mm, ensuring that the insertion rod 21 can be inserted smoothly without being too loose. The fixing plate 3 is made of cold-rolled steel plate with a thickness of 2mm and is fixed to the inner wall of the external hot air blower with screws. The fixing position must ensure that the hot air blower circuit board 1 does not interfere with other internal components of the hot air blower after installation.

[0024] The hot air blower circuit board 1 is 200mm long, 150mm wide, and 1.6mm thick; the through hole 4 has a diameter of 4.2mm, and the four through holes 4 are located at the four corners 20mm from the edge of the circuit board; the fixing plate 3 is 220mm long, 170mm wide, and 2mm thick;

[0025] The distance between the hot air blower circuit board 1 and the fixing plate 3 is set to 10-15mm to facilitate heat dissipation of the circuit board. The fixing plate 3 is fixed in the hot air blower by connecting the fixing plate 3 to the preset threaded holes on the inner wall of the hot air blower through M4 screws. There are 4 screws, which are distributed in the middle of the four sides of the fixing plate 3.

[0026] The insertion rod 21 is made of 304 stainless steel, which has good rust resistance. Its length is determined according to the distance between the hot air blower circuit board 1 and the fixing plate 3 and the depth of the connecting cylinder 5. For example, the total length is 30mm, of which the length of the part inserted into the through hole 4 is 10mm. The limiting ring 22 and the insertion rod 21 are integrally formed. The limiting ring 22 has a diameter of 8mm and a thickness of 2mm, which can effectively limit the position of the hot air blower circuit board 1 on the insertion rod 21. The nut 23 is an M4 hexagonal nut, also made of 304 stainless steel. After tightening, it can firmly fix the hot air blower circuit board 1 between the limiting ring 22 and the nut 23. The annular groove 24 has a width of 3mm and a depth of 1mm. The rubber ring 25 is made of nitrile rubber, which has good elasticity and wear resistance. Its cross-sectional diameter is 1.5mm. In its natural state, the outer diameter is slightly larger than the diameter of the insertion rod 21. After being installed in the annular groove 24, the outer side of the rubber ring 25 protrudes slightly from the surface of the insertion rod 21.

[0027] Insert rod 21 has a diameter of 4mm and a total length of 30mm. The insertion through hole 4 has a length of 10mm and a thread length of 8mm at the end. Limiting ring 22 has a diameter of 8mm and a thickness of 2mm. Annular groove 24 has a width of 3mm and a depth of 1mm. Rubber ring 25 has a cross-sectional diameter of 1.5mm and a width of 3mm.

[0028] A rubber gasket with a diameter of 6mm and a thickness of 1mm is provided between the nut 23 and the hot air blower circuit board 1 to prevent damage to the circuit board surface when the nut 23 is tightened; a circular knob with a diameter of 6mm is provided at the top of the plug rod 21 to facilitate plugging and unplugging the plug rod 21.

[0029] The connecting cylinder 5 and the fixing plate 3 are connected by welding. The connecting cylinder 5 is a cylindrical hollow structure, made of the same cold-rolled steel plate as the fixing plate 3. Its inner diameter is 0.5mm larger than the diameter of the insertion rod 21 to ensure that the insertion rod 21 can be smoothly inserted. Its length is 15mm. The slot 6 is an annular structure, located 5mm from the top of the connecting cylinder 5. Its width is 3.2mm and its depth is 1.2mm, which matches the size of the rubber ring 25. When the rubber ring 25 is inserted into the slot 6, it can generate a certain clamping force to prevent the insertion rod 21 from falling out of the connecting cylinder 5 on its own.

[0030] The connecting cylinder 5 has an inner diameter of 4.5mm, a length of 15mm, and a wall thickness of 1mm; the slot 6 has a width of 3.2mm, a depth of 1.2mm, and is 5mm from the top of the connecting cylinder 5.

[0031] The inner wall of the connecting cylinder 5 is polished, with a surface roughness Ra≤1.6μm, which reduces the friction when the insertion rod 21 is inserted; after the rubber ring 25 is inserted into the slot 6, the radial pressure between the two is 5-8N, which can ensure a stable connection and can also be pulled out by appropriate external force when disassembly is required.

[0032] In some technical solutions, fixing blocks 7 are installed on both the left and right sides of the fixing plate 3. The side wall of the fixing block 7 is provided with a sliding groove 8. A slider 9 is slidably installed in the sliding groove 8. A support plate 10 is installed on the side wall of the slider 9. The support plate 10 is located below the hot air blower circuit board 1 and can support the hot air blower circuit board 1.

[0033] The fixing blocks 7 are made of ABS engineering plastic and are fixed to the left and right sides of the fixing plate 3 with screws. Two fixing blocks 7 are installed on each side, located at the front and rear ends of the fixing plate 3 respectively. The fixing blocks 7 are 20mm long, 15mm wide, and 10mm high. The slide groove 8 is opened on the side of the fixing block 7 facing the support plate 10. Its cross-section is T-shaped, with a length of 15mm, a width of 5mm, and a depth of 4mm. The slider 9 is made of the same material as the fixing blocks 7, and its shape matches the slide groove 8, allowing it to slide smoothly within the slide groove 8 with low friction. The support plate 10 is a rectangular thin plate made of stainless steel, with a thickness of 1mm, a width of 20mm, and a length the same as the width of the hot air blower circuit board 1. The distance between its top surface and the bottom surface of the hot air blower circuit board 1 does not exceed 1mm, ensuring reliable support for the circuit board while avoiding excessive pressure on the circuit board.

[0034] The fixed block 7 is 20mm long, 15mm wide, and 10mm high; the slide groove 8 is 15mm long, 5mm wide, and 4mm deep; the sliding block 9 has a clearance of 0.1-0.2mm with the slide groove 8; the support plate 10 is 1mm thick, 20mm wide, and 150mm long (the same width as the hot air blower circuit board 1).

[0035] = Limiting protrusions are set at both ends of the slide groove 8 to limit the sliding distance of the slider 9 to 0-10mm; = A layer of silicone pad with a thickness of 0.5mm is pasted on the top surface of the support plate 10 to prevent scratching the bottom surface of the hot air blower circuit board 1.

[0036] In some technical solutions, a spring 11 is installed inside the slide 8. One end of the spring 11 is in contact with the side wall of the slider 9, and the other end of the spring 11 is in contact with the inner wall of the slide 8.

[0037] Spring 11 is a stainless steel compression spring with a wire diameter of 0.5mm, an outer diameter of 4mm, and a free length of 15mm. When installed in the slide groove 8, it is in a slightly compressed state, applying a force to the slider 9 in the direction of the hot air blower circuit board 1, so that the support plate 10 always remains in contact with the bottom surface of the hot air blower circuit board 1, enhancing the support effect. When the hot air blower vibrates during operation, spring 11 can absorb some of the vibration energy through its own extension and contraction, playing a buffering role and reducing the impact of vibration on the hot air blower circuit board 1.

[0038] Spring 11 has a wire diameter of 0.5mm, an outer diameter of 4mm, a free length of 15mm, and 5 effective coils. After installation, the initial compression is 2mm, and the initial elastic force is 1-2N.

[0039] One end of the spring 11 is fixed to the inner wall of the slide 8 by spot welding, and the other end is fixed to the side wall of the slider 9 by adhesive. The spring 11 should be able to withstand no less than 10,000 compression and expansion cycles without failure.

[0040] In some technical solutions, the side wall of the support plate 10 is equipped with a locking block 12. There are two locking blocks 12, which are located on the front and rear sides of the hot air blower circuit board 1, respectively.

[0041] The locking block 12 is made of ABS engineering plastic and is integrally molded with the support plate 10 by injection molding. It has a height of 5mm, a width of 8mm, and a thickness of 2mm. Its inner sidewalls are fitted to the front and rear sides of the hot air blower circuit board 1, and the mating surfaces are polished to prevent scratching the circuit board. The distance between the two locking blocks 12 matches the length of the hot air blower circuit board 1, with an error not exceeding ±0.5mm. This effectively limits the front-rear direction of the hot air blower circuit board 1, preventing displacement of the circuit board in that direction.

[0042] The card block 12 has a height of 5mm, a width of 8mm, and a thickness of 2mm. The distance between the two card blocks 12 is the same as the length of the hot air blower circuit board 1 (e.g., 200mm), with an error of ±0.5mm.

[0043] The fitting gap between the card block 12 and the hot air blower circuit board 1 is 0.1-0.3mm, which can serve as a limit without being too tight and affecting the installation and disassembly of the circuit board; a layer of 0.3mm thick velvet is pasted on the inside of the card block 12 to reduce friction with the circuit board.

[0044] In some technical solutions, a controller interface 13 is installed on the side wall of the hot air blower circuit board 1. One end of a connecting wire 14 is inserted into the controller interface 13, and the other end of the connecting wire 14 is electrically connected to an external control panel.

[0045] The controller interface 13 uses a DB9 type interface and is fixed to the edge of the hot air blower circuit board 1 by soldering. The interface pins are reliably connected to the circuit on the circuit board, and the solder joints need to be tinned to enhance conductivity and durability. The connecting cable 14 uses multi-core copper wire with an outer PVC insulation layer and a wire cross-sectional area of ​​0.2 mm². 2 The length is determined according to the internal structure of the hot air blower, generally 300-500mm. Both ends are equipped with a plug that matches the controller interface 13 and a plug that connects to the external control panel. The plug and the wire are connected by crimping and soldering to ensure reliable electrical connection.

[0046] The controller interface 13 is a DB9 type, with dimensions of 22mm × 13mm × 10mm; the connecting cable 14 has a conductor cross-sectional area of ​​0.2mm². 2 The insulation layer is 0.5mm thick and 400mm long; the tensile force at the crimping point between the plug and the wire is not less than 5N.

[0047] The controller interface 13 has an IP40 protection rating to prevent dust from entering the interface; the connecting cable 14 is fixed to the preset buckle inside the hot air blower with a cable tie to prevent the cable from moving around and causing the interface to loosen.

[0048] In some technical solutions, a rubber washer 15 is sleeved on the outside of the insertion rod 21, and the rubber washer 15 is in contact with the side wall of the connecting cylinder 5.

[0049] The rubber gasket 15 is made of nitrile rubber, which has good sealing properties and elasticity. Its inner diameter is the same as that of the insertion rod 21, which is 4mm, its outer diameter is 8mm, and its thickness is 2mm. It is installed on the insertion rod 21 at the position between the limiting ring 22 and the top of the connecting cylinder 5. When the insertion rod 21 is inserted into the connecting cylinder 5 and fixed, the rubber gasket 15 is deformed by the compression of the limiting ring 22 and the top of the connecting cylinder 5, which can effectively fill the gap between the two and play a sealing role, preventing dust, moisture and other substances from entering the interior of the connecting cylinder 5. At the same time, it increases the friction between the insertion rod 21 and the connecting cylinder 5, further enhancing the stability of the connection.

[0050] Rubber gasket 15 has an inner diameter of 4mm, an outer diameter of 8mm, a thickness of 2mm, and a hardness of 60±5 Shore A.

[0051] The rubber gasket 15 can maintain good elasticity and sealing performance within a temperature range of -20℃ to 100℃; the distance between the rubber gasket 15 and the limiting ring 22 is 1mm, ensuring that it can accurately fit against the side wall of the connecting cylinder 5 after installation.

[0052] I. Installation Process and Principle

[0053] Pre-installation of the fixing plate and connecting cylinders: The fixing plate 3 is fixed to the pre-threaded holes on the inner wall of the external hot air blower with M4 screws. Four connecting cylinders 5 are pre-welded to the four corners of the fixing plate 3, and their positions correspond to the through holes 4 at the four corners of the hot air blower circuit board 1. The slots 6 on the inner side of the connecting cylinders 5 match the size of the rubber rings 25 on the insertion rods 21, providing a structural basis for subsequent rapid positioning.

[0054] Preparation of the support plate and buffer structure: After the fixing blocks 7 on both sides of the fixing plate 3 are installed with screws, the slider 9 in the slide groove 8 is positioned close to the hot air blower circuit board 1 under the initial elastic force (1-2N) of the spring 11. The silicone pad on the top surface of the support plate 10 is in its natural state at this time, and the distance between the two locking blocks 12 has been preset according to the length of the circuit board to ensure that the circuit board can be limited in front and back after it is placed.

[0055] Circuit board positioning and fixing: Place the hot air blower circuit board 1 on the support plate 10, and the locking block 12 initially limits its front and rear directions. Then, insert the four rods 21 through the through holes 4 at the four corners of the circuit board, and the limiting ring 22 fits against the surface of the circuit board to achieve vertical positioning. The circular knob at the top of the rod 21 makes it easy for the operator to apply external force to insert the lower end of the rod 21 into the connecting cylinder 5.

[0056] Locking of the connecting mechanism: When the insertion rod 21 is inserted into the connecting cylinder 5, the rubber ring 25 is deformed by the pressure of the cylinder wall until it reaches the position of the slot 6, where it elastically resets and locks into the slot, generating a radial pressure of 5-8N to achieve initial fixation. At this time, the rubber washer 15 is deformed by the limiting ring 22 and the top of the connecting cylinder 5, filling the gap and enhancing the sealing. Finally, the M4 nut 23 is tightened, and the buffering effect of the rubber washer prevents damage to the circuit board surface, completing the overall installation.

[0057] II. Working Process and Principle

[0058] Vibration buffering mechanism: The vibration generated by the hot air blower during operation is transmitted to the connecting structure through the fixed plate 3. The spring 11 absorbs the vibration energy through extension and contraction (maximum deformation of 10mm), and the sliding engagement of the slider 9 in the groove 8 further weakens the vibration transmission. The elastic deformation of the rubber ring 25 and the rubber washer 15 can also buffer some radial and axial vibrations. The multiple buffering structure keeps the amplitude of the circuit board within 0.1mm.

[0059] Electrical connection stability: The controller interface 13 is electrically connected to the connecting cable 14 via a DB9 plug. The crimped and welded contact structure can withstand a tensile force of over 5N, preventing poor contact caused by vibration. After the connecting cable 14 is secured with cable ties, its PVC insulation layer remains stable in environments ranging from -20℃ to 100℃, ensuring that signal transmission is not affected by temperature changes.

[0060] Synergistic Heat Dissipation and Protection: The 10-15mm gap between the hot air blower circuit board 1 and the mounting plate 3 forms an air convection channel, which, combined with the heat dissipation performance of the FR-4 substrate, keeps the operating temperature below 60℃. The IP40 protection rating of the rubber gasket 15 and the controller interface effectively prevents dust from entering the connection parts and extends the service life of the components.

[0061] III. Disassembly Process and Principles

[0062] Unlocking the connection mechanism: The operator uses a tool to unscrew nut 23, and the elasticity of the rubber gasket allows it to easily separate from the circuit board surface. By applying axial tension through the knob at the top of the plug, the rubber ring 25 deforms again under the tension and disengages from the slot 6. At this time, the elastic reset of the rubber washer 15 provides clearance for the plug to be pulled out.

[0063] Removal of the circuit board: After the insertion rod 21 is fully pulled out, the circuit board can be lifted upwards to detach from the support plate 10. After the spring 11 loses pressure on the circuit board, it pushes the slider 9 to reset, and the support plate 10 returns to its initial position. The entire disassembly process does not require special tools and can be completed by a single person in 30 seconds.

[0064] Ease of component maintenance: The modular design of each component facilitates individual replacement. For example, the rubber ring 25 can be directly removed from the annular groove 24 after wear. The spring 11 is fixed by spot welding and glue, making it easy to disassemble during maintenance, which greatly reduces maintenance costs.

[0065] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hot air blower circuit board that is easy to disassemble, comprising a hot air blower circuit board (1), a connecting mechanism (2), and a fixing plate (3), characterized in that: The hot air blower circuit board (1) has through holes (4) at each of its four corners. A connecting mechanism (2) is inserted into each of the four through holes (4). The fixing plate (3) is installed inside the external hot air blower. The connecting mechanism (2) is connected to the fixing plate (3). The connecting mechanism (2) includes a plug rod (21), a limiting ring (22), a nut (23), an annular groove (24), and a rubber ring (25). The lower wall of the plug rod (21) is inserted into the through hole (4). The limiting ring (22) is installed on the outer side of the plug rod (21). The limiting ring (22) is in contact with the side wall of the hot air blower circuit board (1). The end of the plug rod (21) is threaded. The nut (23) is rotated and installed on the outside of the plug rod (21). The side wall of the plug rod (21) is provided with an annular groove (24). The rubber ring (25) is sleeved on the outside of the plug rod (21). The rubber ring (25) is located in the annular groove (24). Connecting cylinders (5) are installed at the four corners of the fixing plate (3). The insert rod (21) can be inserted into the connecting cylinder (5). The inner side wall of the connecting cylinder (5) is provided with a slot (6). The rubber ring (25) can be inserted into the slot (6).

2. The easily disassembled hot air blower circuit board according to claim 1, characterized in that: Fixing blocks (7) are installed on both the left and right sides of the fixing plate (3). The side wall of the fixing block (7) is provided with a sliding groove (8). A slider (9) is slidably installed in the sliding groove (8). A support plate (10) is installed on the side wall of the slider (9). The support plate (10) is located below the hot air blower circuit board (1). The support plate (10) can support the hot air blower circuit board (1).

3. The easily disassembled hot air blower circuit board according to claim 2, characterized in that: A spring (11) is installed inside the slide groove (8). One end of the spring (11) is in contact with the side wall of the slider (9), and the other end of the spring (11) is in contact with the inner wall of the slide groove (8).

4. The easily disassembled hot air blower circuit board according to claim 2, characterized in that: The side wall of the support plate (10) is equipped with a locking block (12). There are two locking blocks (12), which are located on the front and rear sides of the hot air blower circuit board (1), respectively.

5. A hot air blower circuit board that is easy to disassemble according to claim 1, characterized in that: The hot air blower circuit board (1) has a controller interface (13) installed on its side wall. One end of a connecting wire (14) is inserted into the controller interface (13), and the other end of the connecting wire (14) is electrically connected to the external control panel.

6. The easily disassembled hot air blower circuit board according to claim 1, characterized in that: A rubber washer (15) is fitted on the outside of the insertion rod (21), and the rubber washer (15) is in contact with the side wall of the connecting cylinder (5).

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