An anti-fouling and anti-wrong soldering device for circuit board soldering

Abstract

The present invention relates to the technical field of circuit board soldering, and discloses an anti-pollution and anti-mis-soldering device for circuit board soldering, which includes a soldering gun and an electric soldering iron. The electric soldering iron is fixedly installed on the soldering gun. A welding switch is fixedly installed at the bottom of the soldering gun. A fixing component for ensuring single-handed soldering is arranged on the soldering gun; through the guidance of the twin positioning parts and the oblique positioning blocks during the progressive process of the limiting rod, the automatic progressive feeding of the solder rod for circuit board soldering is realized, and the quantitative and rated angle of the progressive feeding are ensured. And the single-handed operation of circuit board soldering is realized, avoiding the problem that the welding operator holds the welding tool with both hands, resulting in the inability to immediately respond to and handle emergencies, ensuring that the operator has room for adjusting emergencies and the position of the circuit board, and the single-handed operation ensures that the welding operator can perform soldering in a complex operation environment, and ensures the relative position of the solder rod and the electric soldering iron is fixed, ensuring the accuracy of soldering.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board soldering, and particularly to an anti-fouling and mis-soldering device for circuit board soldering. Background Art

[0002] Circuit board soldering is a crucial step in the circuit board manufacturing process. Various electronic components on the circuit board, such as resistors, capacitors, crystal oscillators, integrated circuits, etc., need to be connected to the circuit board through soldering. Soldering provides a stable physical and electrical connection, ensuring signal and power transmission between electronic components;

[0003] In many current electronic production and repair environments, soldering operators will operate in a two-handed soldering manner. One hand firmly holds the soldering iron (welding torch), which is a high-temperature tool used to heat conductive materials (such as tin) to make it soft or melt; the other hand holds the welding rod (also known as solder wire), which is a thin wire made of tin or other metals and will be melted onto the joints of the circuit board during soldering to create a channel through which current can pass;

[0004] Soldering is a task that requires high concentration and delicate operation. It requires the soldering operator to accurately align the soldering torch with the tiny solder joints and complete the soldering within a short time. This requires the soldering operator to have good eyesight and good judgment ability. During the soldering process, the positions of the soldering torch and the solder strip need to be relatively stable to ensure the quality of the solder joints. If the shaking amplitude of the hand is too large, it will cause problems such as false soldering, missed soldering, or short circuit of the solder joints, affecting the use effect of the circuit board;

[0005] And this soldering method means that both hands of the soldering operator are occupied, and the soldering operator cannot immediately respond to and handle emergencies. For example, sudden mechanical failures, phone calls, or requests for help from other people all require them to put down the tools in their hands first to handle, which results in an extended response time. Moreover, when both hands are holding tools for operation, the working scenario and action mode are relatively single and cannot adapt to complex and changeable working environments. For example, if soldering needs to be performed at different angles or positions, the ideal effect cannot be achieved due to the limitation of hand movement;

[0006] During storage and transportation, if the circuit board is not properly packaged and protected, or is exposed to an open environment for too long, dust will accumulate on the surface of the circuit board. And inadvertently, the soldering operator will bring dust from their own clothing or hands to the surface of the circuit board. In addition, since the circuit board itself is composed of many electronic elements and conductors, these will accumulate static charges. Around an object with static charges, other nearby objects and dust particles are attracted by the electrostatic field and are adsorbed on the surface of the charged object. When the solder joints of the circuit board are attached with dust, it will prevent the complete fusion of the solder and the solder joints, which fundamentally reduces the reliability of the solder joints, resulting in problems such as the solder joints breaking, being poorly soldered or having solder bridging after being stressed. And if dust enters the circuit, it will cause a short circuit. Especially in microelectronic devices, even tiny dust can cause malfunctions.

[0007] Therefore, a device for preventing pollution and mis-soldering in circuit board soldering is proposed. Summary of the Invention

[0008] The purpose of the present invention is to provide a device for preventing pollution and mis-soldering in circuit board soldering to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above purpose, the present invention provides the following technical solution: A device for preventing pollution and mis-soldering in circuit board soldering, including a soldering gun and an electric soldering iron. The electric soldering iron is fixedly installed on the soldering gun. A welding switch is fixedly installed at the bottom of the soldering gun. A fixing component for ensuring single-handed soldering is arranged on the soldering gun. A progressive component for ensuring continuous soldering is arranged on the soldering gun. A dust cleaning and cooling component is arranged on the soldering gun.

[0010] The fixing component includes an inclined positioning block. The inclined positioning block is fixedly connected to the electric soldering iron. Twin positioning members are symmetrically and fixedly connected to one side of the soldering gun close to the inclined positioning block. A solder rod is slidably connected inside both of the twin positioning members.

[0011] The progressive component includes a progressive switch. The progressive switch is fixedly installed at the bottom of the soldering gun. A fixing block is fixedly connected to one side of the soldering gun close to the solder rod. A rotating gear is rotatably connected inside the fixing block. A toothed block is fixedly connected to the bottom of the progressive switch. A lead screw is threadedly connected inside the rotating gear. One end of the lead screw close to the welding switch is rotatably connected to a triangular pushing block. A bottom block is fixedly connected to one side of the soldering gun close to the triangular pushing block. Progressive grooves are symmetrically opened on one side of the bottom block close to the triangular pushing block. A limiting rod is fixedly connected to one end of the bottom block close to the electric soldering iron. Slide rods are slidably connected inside both of the progressive grooves. Clamping friction blocks are fixedly connected to one ends of both of the slide rods away from the progressive grooves. A reset plate is fixedly connected to one end of the triangular pushing block close to the limiting rod. Elastic belts are symmetrically sleeved on the surfaces of both of the slide rods with the triangular pushing block as a reference.

[0012] The dust cleaning component includes a dust cleaning switch, which is fixedly installed at the bottom of the soldering gun. One side of the soldering gun away from the oblique positioning block is fixedly connected with a bottom plate, and a fan is fixedly installed on the side of the bottom plate close to the electric soldering iron.

[0013] Preferably, there is an electrical connection relationship between the electric soldering iron and the welding switch.

[0014] Preferably, the solder rod is slidably connected inside the oblique positioning block, and one end of the solder rod close to the electric soldering iron is in contact with the electric soldering iron.

[0015] Preferably, the rotating gear meshes with the side of the engaging teeth close to the fixed block.

[0016] Preferably, the opposite surfaces of the triangular pushing block and the limiting rod are in contact.

[0017] Preferably, the overlapping dimension of the two clamping friction blocks is adapted to the diameter of the solder rod.

[0018] Preferably, the progressive groove is composed of groove a, groove b, and groove c. Groove a of the progressive groove is set to guide the sliding rod to move towards groove b when it slides inside the progressive groove.

[0019] Preferably, there is an electrical connection relationship between the fan and the dust cleaning switch, and the fan is set to disturb the air flow towards the electric soldering iron.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. During the process of the limiting rod being advanced, through the guidance of the double positioning member and the oblique positioning block, the automatic advancement of the solder rod for circuit board welding is realized, and the quantitative and rated angle of the advancement are ensured. The single-handed operation of the circuit board welding is achieved, avoiding the problem that the welding operator cannot immediately respond to and handle emergencies due to holding the welding tool with both hands, ensuring that the operator has room for adjusting emergencies and the position of the circuit board. And the single-handed operation ensures that the welding operator can perform welding in a complex operation environment, and ensures the relative position of the solder rod and the electric soldering iron is fixed, ensuring the accuracy of welding;

[0022] 2. The dust cleaning switch electrically controls the fan to be powered on and disturb the air flow towards the electric soldering iron, avoiding problems such as the solder joints of the circuit board being attached with dust, which hinders the complete fusion of the solder and the solder joints, resulting in the solder joints breaking, being poorly soldered or having solder leakage after being stressed. It ensures that the area around the solder joints is clean during welding by the welding operator, guarantees the quality of welding, and reduces the time and energy for the welding operator to manually clean the dust. After the cleaning is completed, the welding operator releases the dust cleaning switch, and the dust cleaning switch electrically controls the fan to be powered off;

[0023] 3. The tin solder bar is advanced towards the soldering iron by the clamping friction block, which avoids the situation that during the soldering process, the soldering operator manually advances the tin solder bar and adjusts the fitting angle between the tin solder bar and the soldering iron, resulting in delays in the soldering progress and the inability to achieve the expected goals for the length and angle of the adjusted tin solder bar. This ensures that the amount of tin and the soldering position are consistent for each soldering, thus guaranteeing the stability and reliability of the solder joint quality. Supplying the tin solder bar at the same angle can better maintain the uniform distribution of soldering heat, reduce the probability of soldering defects, and reduce defects such as cold soldering and false soldering that may occur during the soldering process, maintaining the consistency of the soldering marks and avoiding problems such as uneven soldering or leaving bad marks. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an elevation view of the overall device of the present invention;

[0025] Figure 2 It is a sectional view of the overall device of the present invention;

[0026] Figure 3 It is a side view of the overall device of the present invention;

[0027] Figure 4 For the present invention Figure 3 An enlarged view of part A in the present invention;

[0028] Figure 5 It is a sectional view of the advancing component of the present invention;

[0029] Figure 6 For the present invention Figure 5 An enlarged view of part B in the present invention;

[0030] Figure 7 It is a position view of the advancing component of the present invention;

[0031] Figure 8 For the present invention Figure 7 An enlarged view of part C in the present invention;

[0032] Figure 9 It is a detailed view of the advancing component of the present invention;

[0033] Figure 10 For the present invention Figure 9 An enlarged view of part D in the present invention.

[0034] In the figure:

[0035] 11. Welding torch; 12. Soldering iron; 13. Welding switch;

[0036] 2. Fixing component; 21. Oblique positioning block; 22. Twin positioning member; 23. Tin solder bar;

[0037] 3. Progressive component; 31. Progressive switch; 32. Fixed block; 33. Rotating gear; 34. Engaging teeth; 35. Lead screw; 36. Triangular push block; 37. Bottom block; 38. Progressive groove; 39. Limit rod; 310. Slide bar; 311. Clamping friction block; 312. Reset plate; 313. Elastic belt;

[0038] 4. Dust cleaning component; 41. Dust cleaning switch; 42. Bottom plate; 43. Fan. Specific implementation mode

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] Please refer to Figures 1 to 10 , the present invention provides an embodiment:

[0041] An anti-fouling and miswelding device for circuit board welding includes a welding torch 11 and an electric soldering iron 12. The electric soldering iron 12 is fixedly installed on the welding torch 11, and there is an electrical connection relationship between the electric soldering iron 12 and the welding switch 13. The welding switch 13 is fixedly installed at the bottom of the welding torch 11. A fixing component 2 for ensuring single-handed welding is provided on the welding torch 11, a progressive component 3 for ensuring continuous welding is provided on the welding torch 11, and a dust cleaning and cooling component 4 is provided on the welding torch 11;

[0042] The fixing component 2 includes an obliquely positioned block 21. The obliquely positioned block 21 is fixedly connected to the electric soldering iron 12. Twin positioning members 22 are symmetrically and fixedly connected to one side of the welding torch 11 close to the obliquely positioned block 21. A solder rod 23 is slidably connected inside each of the two twin positioning members 22. The solder rod 23 is slidably connected inside the obliquely positioned block 21, and one end of the solder rod 23 close to the electric soldering iron 12 is in contact with the electric soldering iron 12;

[0043] Specifically, by setting the solder rod 23 to be in contact with the electric soldering iron 12 at one end, the problem in the prior art that the welding operator needs to hold the welding tool with both hands, resulting in the inability to immediately respond to and handle emergencies, is solved. It ensures that the operator has room for adjusting emergencies and the position of the circuit board, and single-handed operation ensures that the welding operator can perform welding in a complex operating environment, and ensures the relative position of the solder rod 23 and the electric soldering iron 12 is fixed, ensuring the accuracy of welding.

[0044] The progressive component 3 includes a progressive switch 31, which is fixedly installed at the bottom of the welding torch 11. A fixed block 32 is fixedly connected to the side of the welding torch 11 close to the solder rod 23. A rotating gear 33 is rotatably connected inside the fixed block 32. The rotating gear 33 meshes with the side of the engaging teeth 34 close to the fixed block 32. The engaging teeth 34 are fixedly connected to the bottom of the progressive switch 31. A lead screw 35 is threadedly connected inside the rotating gear 33. One end of the lead screw 35 close to the welding switch 13 is rotatably connected to a triangular pushing block 36. The opposite surface of the triangular pushing block 36 is in contact with the limiting rod 39. A bottom block 37 is fixedly connected to the side of the welding torch 11 close to the triangular pushing block 36. Progressive grooves 38 are symmetrically opened on the side of the bottom block 37 close to the triangular pushing block 36. The progressive groove 38 is composed of an a groove, a b groove, and a c groove. The a groove of the progressive groove 38 is used to guide the sliding rod 310 to move towards the b groove when the sliding rod 310 slides inside the progressive groove 38. A limiting rod 39 is fixedly connected to the end of the bottom block 37 close to the soldering iron 12. Sliding rods 310 are slidably connected inside both of the two progressive grooves 38. Clamping friction blocks 311 are fixedly connected to the ends of both of the two sliding rods 310 away from the progressive grooves 38. The overlapping dimension of the two clamping friction blocks 311 is adapted to the diameter of the solder rod 23. A reset plate 312 is fixedly connected to the end of the triangular pushing block 36 close to the limiting rod 39. Elastic belts 313 are symmetrically sleeved on the surfaces of the two sliding rods 310 with the triangular pushing block 36 as a reference;

[0045] Specifically, the solder rod 23 is pushed towards the soldering iron 12 through the clamping friction block 311, which solves the situation in the prior art that when the solder rod 23 is consumed, the welding operator needs to manually push the solder rod 23 towards the solder joint position, saving the time for the welding operator to manually adjust, and ensuring that the relative position between the pushed solder rod 23 and the soldering iron 12 is fixed. At the same time, it ensures that the same amount of the solder rod 23 to be consumed each time is advanced, guaranteeing the consistency and accuracy of welding.

[0046] Preferably, the progressive groove 38 is in a triangular arc state. The horizontal side of the progressive groove 38 is the a groove, the inclined side of the progressive groove 38 is the b groove, and the vertical side of the progressive groove 38 is the c groove. The c groove of the progressive groove 38 is an inclined plane, and the high point of the inclined plane of the c groove is obliquely towards the connection with the a groove. When the triangular pushing block 36 pushes the sliding rod 310 towards the limiting rod 39, the triangular pushing block 36 will guide the sliding rod 310 into the b groove of the progressive groove 38. When the sliding rod 310 is pushed by the reset plate 312 to the connection between the b groove and the c groove of the progressive groove 38, the elastic belt 313 provides the initial force for the reset of the sliding rod 310 through the elastic contraction of the elastic belt 313.

[0047] The dust cleaning component 4 includes a dust cleaning switch 41, which is fixedly installed at the bottom of the welding torch 11. A bottom plate 42 is fixedly connected to the side of the welding torch 11 away from the inclined positioning block 21. A fan 43 is fixedly installed on the side of the bottom plate 42 close to the electric soldering iron 12. There is an electrical connection relationship between the fan 43 and the dust cleaning switch 41. The fan 43 is arranged to disturb the air flow in the direction of the electric soldering iron 12.

[0048] Specifically, by disturbing the air flow at the welding point of the electric soldering iron 12 by the fan 43, it solves the problems in the prior art that the solder joints of the circuit board are attached by dust, which hinders the complete fusion of the solder and the solder joints, resulting in the fracture, false soldering or missed soldering of the solder joints after being stressed, etc. It ensures that the area around the solder joints is clean during welding by the welding operator, and guarantees the welding quality.

[0049] The working principle of the above implementation is as follows:

[0050] The initialization steps are as follows:

[0051] The solder bar 23 slides in the inclined positioning block 21 and the twin positioning members 22, and the end of the inclined positioning block 21 close to the electric soldering iron 12 abuts against the bottom end of the electric soldering iron 12, ensuring that the solder bar 23 can be completely heated and melted during welding. The two clamping and friction blocks 311 wrap the solder bar 23, ensuring that the solder bar 23 can be advanced after the progressive switch 31 is pressed. The end of the sliding rod 310 away from the clamping and friction blocks 311 is at the connection of the a groove and the c groove of the progressive groove 38, ensuring that the sliding rod 310 can slide from the a groove after the triangular pushing block 36 applies force. The top of the locking tooth 34 is at the horizontal position of the lead screw 35, ensuring that the locking tooth 34 can provide enough distance for the rotating gear 33 to rotate after the progressive switch 31 is pressed.

[0052] The working operation steps are as follows:

[0053] As Figures 1 - 4 shown, the welding operator holds the welding torch 11 with the right hand and presses the dust cleaning switch 41 with the bottom end of the electric soldering iron 12 aligned with the position to be welded. The dust cleaning switch 41 electrically controls the fan 43 to be powered on and disturbs the air flow in the direction of the electric soldering iron 12. The fan 43 moves the dust at the solder joint position and its nearby position aligned with the electric soldering iron 12 away from the solder joint position by pushing the air flow, avoiding the problems in the prior art that the solder joints of the circuit board are attached by dust, which hinders the complete fusion of the solder and the solder joints, resulting in the fracture, false soldering or missed soldering of the solder joints after being stressed, etc. It ensures that the area around the solder joints is clean during welding by the welding operator, guarantees the welding quality, and reduces the time and effort for the welding operator to manually clean the dust. After cleaning, the welding operator releases the dust cleaning switch 41, and the dust cleaning switch 41 electrically controls the fan 43 to be powered off.

[0054] As Figures 5 - 10As shown, the welding operator then presses the welding switch 13. The welding switch 13 electrically controls the electric soldering iron 12 to be energized. The electric soldering iron 12 is energized and heated to melt the solder rod 23 in contact with it. At this time, the welding operator needs to replenish the solder rod 23, and then presses the progressive switch 31. During the process of the bottom of the progressive switch 31 moving towards the welding torch 11, the progressive switch 31 makes the rotating gear 33 rotate inside the fixed block 32 through the engaging teeth 34 on the side near the top of the welding torch 11. During the rotation of the rotating gear 33, it drives the lead screw 35 to perform a threaded transmission with it. One end of the lead screw 35 near the limit rod 39 rotates inside the triangular pushing block 36 and displaces towards the limit rod 39. The tendency of the triangular pushing block 36 to be driven by the lead screw 35 to rotate is restricted by the limit rod 39 from rotating. Thus, the triangular pushing block 36 remains stable and displaces towards the limit rod 39. During the displacement of the triangular pushing block 36, it pushes the sliding rod 310 in the direction away from the rotating gear 33. Under the push of the triangular pushing block 36, the sliding rod 310 slides inside the a groove within the progressive groove 38. At the same time, the two clamping friction blocks 311 clamp the solder rod 23 and advance the solder rod 23 towards the limit rod 39 through the sliding rod 310. During the process of being advanced, the limit rod 39 is guided by the twin positioning member 22 and the oblique positioning block 21, so that one end near the electric soldering iron 12 advances and re - contacts the electric soldering iron 12. At this time, the welding operator continues the welding work, avoiding the situation where the welding operator manually advances the solder rod 23 during the welding process and adjusts the fitting angle between the solder rod 23 and the electric soldering iron 12, resulting in delays in the welding progress and the length and angle of the adjusted solder rod 23 not meeting the expected goals. It ensures that the solder volume and welding position are consistent for each welding, thus ensuring the stability and reliability of the solder joint quality. Replenishing the solder rod 23 at the same angle can better maintain the uniform distribution of welding heat, reduce the probability of welding defects, and reduce defects such as cold soldering and false soldering that may occur during the welding process, maintain the consistency of the welding marks, and avoid problems such as uneven welding or leaving bad marks.

[0055] When the slide bar 310 slides inside the progressive groove 38 to the connection between the a groove and the b groove, under the action of the shape of the triangular pushing block 36, the two slide bars 310 enter the b groove on the corresponding side. At this time, the two clamping friction blocks 311 are separated and released from the interference relationship with the tin soldering rod 23 under the action of the slide bar 310. At this time, the welding operator releases the progressive switch 31, and the progressive switch 31 causes the screw rod 35 to rotate and move inside the rotating gear 33 in the opposite direction to the previous one through the latch tooth 34 and the rotating gear 33. The screw rod 35 drives the triangular pushing block 36 to move to the side away from the limit rod 39. The triangular pushing block 36 causes the slide bar 310 to slide in the b groove of the progressive groove 38 toward the fixed block 32 through the reset plate 312. At this time, due to the shape of the b grooves of the two progressive grooves 38, the two elastic belts 313 are stretched by the separation action of the slide bar 310. When the slide bar 310 slides in the b groove of the progressive groove 38 to the connection between the b groove and the b groove, When the soldering rod 23 is connected to the c groove, the two elastic belts 313 are elastically contracted, so that the two slide bars 310 drive the two clamping friction blocks 311 to gradually and synchronously move toward the surface of the soldering rod 23, until the slide bar 310 slides back to the connection between the c groove and the a groove through the c groove of the progressive groove 38, and the opposite surfaces of the two clamping friction blocks 311 re-attach and clamp the soldering rod 23. In this process, the soldering rod 23 for circuit board welding is automatically advanced and the quantitative and rated angle of the progressive is guaranteed, and the one-handed operation of circuit board welding is realized, avoiding the problem that the welding operator cannot respond to and handle emergencies immediately due to holding the welding tool with both hands, ensuring that the operator has room to adjust the emergencies and the position of the circuit board, and the one-handed operation ensures that the welding operator can perform welding in a complex operating environment, and ensures that the relative position of the soldering rod 23 and the soldering iron 12 is fixed, ensuring the accuracy of welding.

[0056] Then the staff releases the welding switch 13, and the welding switch 13 electrically controls the electric soldering iron 12 to cut off the power, and the welding process ends here.

[0057] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0058] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-fouling and anti-wrong soldering device for circuit board soldering, characterized in that: It includes a welding torch (11) and an electric soldering iron (12). The electric soldering iron (12) is fixedly installed on the welding torch (11). A welding switch (13) is fixedly installed at the bottom of the welding torch (11). A fixing component (2) is arranged on one side of the welding torch (11). A progressive component (3) is arranged on the side of the welding torch (11) close to the fixing component (2). A dust cleaning component (4) is arranged on the side of the welding torch (11) far from the fixing component (2). A fixing component (2) for ensuring single-handed welding is arranged on the welding torch (11), where: The fixing component (2) includes an inclined positioning block (21). The inclined positioning block (21) is fixedly connected to the outer surface of the electric soldering iron (12). Two twin positioning members (22) are symmetrically and fixedly connected to the side of the welding torch (11) close to the inclined positioning block (21). A solder bar (23) is slidably connected inside each of the two twin positioning members (22). A progressive component (3) for ensuring continuous welding is arranged on the welding torch (11), where: The progressive component (3) includes a progressive switch (31). The progressive switch (31) is fixedly installed at the bottom of the welding torch (11). A fixing block (32) is fixedly connected to the side of the welding torch (11) close to the solder bar (23). A rotating gear (33) is rotatably connected inside the fixing block (32). A toothed block (34) is fixedly connected to the bottom of the progressive switch (31). A lead screw (35) is threadedly connected inside the rotating gear (33). One end of the lead screw (35) close to the welding switch (13) is rotatably connected to a triangular pushing block (36). A bottom block (37) is fixedly connected to the side of the welding torch (11) close to the triangular pushing block (36). Progressive grooves (38) are symmetrically formed in the up and down directions on the side of the bottom block (37) close to the triangular pushing block (36). A limiting rod (39) is fixedly connected to one end of the bottom block (37) close to the electric soldering iron (12). Slide rods (310) are slidably connected inside the progressive grooves (38). Clamping friction blocks (311) are fixedly connected to the ends of the slide rods (310) far from the progressive grooves (38). A reset plate (312) is fixedly connected to one end of the triangular pushing block (36) close to the limiting rod (39). Elastic belts (313) are symmetrically sleeved on the surfaces of the two slide rods (310) with the triangular pushing block (36) as a reference. A dust cleaning component (4) for cleaning and cooling is arranged on the welding torch (11), where: The dust cleaning component (4) includes a dust cleaning switch (41). The dust cleaning switch (41) is fixedly installed at the bottom of the welding torch (11). A bottom plate (42) is fixedly connected to the side of the welding torch (11) far from the inclined positioning block (21). A fan (43) is fixedly installed on the side of the bottom plate (42) close to the electric soldering iron (12).

2. The anti-fouling and mis-welding device for circuit board welding according to claim 1, wherein: There is an electrical connection relationship between the electric soldering iron (12) and the welding switch (13).

3. The anti-fouling and mis-welding device for circuit board welding according to claim 1, wherein: The tin solder bar (23) is slidably connected to the inside of the obliquely positioned block (21), and one end of the tin solder bar (23) close to the soldering iron (12) is in contact with the soldering iron (12).

4. The anti-fouling and mis-welding device for circuit board welding according to claim 1, wherein: The rotating gear (33) meshes with one side of the cogs (34) close to the fixed block (32).

5. The anti-fouling and mis-welding device for circuit board welding according to claim 1, characterized in that: The opposite surfaces of the triangular pushing block (36) and the limiting rod (39) are in contact with each other.

6. The anti-fouling and mis-welding device for circuit board welding according to claim 1, characterized in that: The overlapping dimension of the two clamping friction blocks (311) is adapted to the diameter of the tin solder bar (23).

7. An anti-fouling and mis-welding device for circuit board welding according to claim 1, characterized in that: The progressive groove (38) consists of a groove a, a groove b, and a groove c. The groove a of the progressive groove (38) is configured to guide the sliding rod (310) to move towards the groove b when the sliding rod (310) slides inside the progressive groove (38).

8. The anti-fouling and mis-welding device for circuit board welding according to claim 1, characterized in that: There is an electrical connection relationship between the fan (43) and the dust cleaning switch (41), and the fan (43) is configured to disturb the air flow towards the soldering iron (12).

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