Circuit board welding tool

Abstract

The present invention provides a circuit board welding tool, which relates to the technical field of electronic devices, and includes a base and a locking part. The locking part is arranged on the base, and at the same time, a guide through hole is also arranged on the base. The base is locked by the locking part and the circuit board, so that the guide through hole can correspond to the welding hole on the circuit board. At this time, when the pins of the components to be welded can pass through the guide through hole on the base, they can be accurately inserted into the welding hole on the circuit board after being guided by the guide through hole, which is convenient for subsequent welding and avoids the damage of the components to be welded due to the assembly stress generated by the first welding. At the same time, it also avoids the existing welding method of excessively enlarging the welding hole of the circuit board to absorb the assembly error of the pin and the welding hole, which is conducive to improving the welding yield, effectively reducing the phenomenon of tin overflow and poor welding during welding, and improving the assembly efficiency and yield rate of the circuit board and the components to be welded.

Description

Technical Field

[0001] The invention relates to the technical field of electronic devices, and in particular to a circuit board welding tool. Background Art

[0002] Most of the components are welded on the printed circuit boards in electronic products. The common practice in the industry is to weld the components on the printed circuit boards first, and then install the printed circuit boards on the electronic product packages such as radiators. Although this can simplify the operation process, for some relatively large devices, if the above method is used to weld the components on the printed circuit boards in advance, and then when the printed circuit boards are installed on the radiators or packages, the printed circuit boards will be subjected to large deformation stress, which may cause some devices on the printed circuit boards to be damaged.

[0003] In response to the above-mentioned industry problems, some new methods have attempted to adopt a process of first locking components and printed circuit boards and then soldering. Since this process requires that the soldering pins of the components can be smoothly placed into the soldering holes of the printed circuit board, the usual practice is to enlarge the soldering holes of the printed circuit board to absorb the assembly errors with the soldering pins. However, this practice often makes the soldering holes too large, resulting in poor subsequent soldering, tin overflow, etc., which in turn results in a low product yield. Summary of the invention

[0004] The purpose of the present invention is to provide a circuit board welding tool to address the deficiencies in the above-mentioned prior art, so as to solve the problem of low product yield due to overly large welding holes during welding of existing circuit boards.

[0005] To achieve the above purpose, the technical solution adopted by the embodiment of the present invention is as follows:

[0006] According to one aspect of an embodiment of the present invention, a circuit board welding tool is provided for assisting the welding of components to be welded on a circuit board, comprising: a base and a locking portion arranged on the base; the base is used to lock with the circuit board through the locking portion; and a guide through hole corresponding to the welding hole on the circuit board is also arranged on the base, for guiding the pins of the components to be welded to be inserted into the welding hole on the circuit board through the guide through hole.

[0007] Optionally, the locking portion includes a first elastic member and a second elastic member that are relatively matched and arranged on the base; an extension portion is respectively provided at the other end of the first elastic member and the second elastic member, and the extension direction of the extension portion intersects with the axial direction of the elastic member; the first elastic member and the second elastic member are inserted into the locking hole of the circuit board along their axial direction, and after being tensioned with the inner wall of the locking hole, the extension portion abuts against the circuit board to enable the base to be clamped with the circuit board.

[0008] Optionally, a guide surface is further formed on the extension portion for guiding the first elastic member and the second elastic member to be inserted into the locking hole of the circuit board.

[0009] Optionally, the locking portion includes a locking column arranged on the base and an external thread arranged on the outer periphery of the locking column, and the locking column is threadedly connected to the locking hole of the circuit board through the external thread.

[0010] Optionally, the aperture of the guide through hole on a side close to the circuit board is smaller than the aperture of the guide through hole on a side away from the circuit board.

[0011] Optionally, the guide through hole is a tapered hole.

[0012] Optionally, the base includes a base body and an isolation boss arranged on the base body; the isolation boss is arranged on the same side as the locking portion, and the isolation boss is used to abut against the circuit board after the locking portion is locked with the circuit board.

[0013] Optionally, the isolation boss is located between the base body and the locking portion.

[0014] Optionally, the base is made of insulating material.

[0015] Optionally, the locking parts include a plurality of locking parts, which are spaced apart and arranged on the same side of the base; the guiding through holes include a plurality of guiding through holes, which correspond one-to-one to the plurality of welding holes on the circuit board.

[0016] The beneficial effects of the present invention include:

[0017] The present invention provides a circuit board welding tool, including a base and a locking part. The locking part is arranged on the base, and a guide through hole is also arranged on the base. The base is locked by the locking part and the circuit board, so that the guide through hole can correspond to the welding hole on the circuit board. At this time, the pins of the components to be welded can pass through the guide through hole on the base, and after being guided by the guide through hole, they can be accurately inserted into the welding hole on the circuit board, which is convenient for subsequent welding processes and avoids the damage of the components to be welded due to the assembly stress generated by the first welding. At the same time, it also avoids the method of excessively enlarging the welding hole of the circuit board to absorb the assembly error between the pin and the welding hole during the existing welding, which is conducive to improving the welding yield, effectively reducing the phenomenon of tin overflow and poor welding during the welding process, and improving the assembly efficiency and yield rate of the circuit board and the components to be welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1One of the structural schematic diagrams of a circuit board welding tool provided by an embodiment of the present invention;

[0020] Figure 2 A second structural schematic diagram of a circuit board welding tool provided by an embodiment of the present invention;

[0021] Figure 3 A third structural schematic diagram of a circuit board welding tool provided by an embodiment of the present invention;

[0022] Figure 4 A fourth structural schematic diagram of a circuit board welding tool provided by an embodiment of the present invention;

[0023] Figure 5 A fifth structural diagram of a circuit board welding tool provided by an embodiment of the present invention;

[0024] Figure 6 The sixth structural schematic diagram of a circuit board welding tool provided in an embodiment of the present invention.

[0025] Icons: 1-circuit board welding tool; 3-circuit board; 4-components to be welded; 41-pins; 6-heat sink; 11-base body; 12-guide through hole; 13-locking part; 131-first elastic member; 132-second elastic member; 133-extension part; 14-isolation boss. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. It should be noted that, in the absence of conflict, the various features in the embodiments of the present invention can be combined with each other, and the combined embodiments are still within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0031] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] With the rapid development of the economy and the accelerated pace of life, people often use automation to improve their living efficiency. The existing way to achieve automation is mainly to use circuit boards as carriers to arrange electronic components on them, so as to achieve automatic control through the combination of software and hardware. In order to increase the scope of use of electronic components, it is necessary to fix the components, circuit boards and electronic products so that the electronic components can have a certain degree of shock and fall resistance. The traditional practice in the industry is to first solder the components on the circuit board, and then install the circuit board on the package of the electronic product. Although this operation process is simple, for some larger devices, when a larger circuit board is installed on the package of the electronic product, the circuit board will be subjected to a large deformation stress, which will cause the components that have been soldered to be easily damaged. In order to avoid this situation, the current practice in the industry is usually to first lock the electronic components, circuit boards and electronic product packages, and then perform the soldering process. However, in this process, it is necessary to make the pins of the electronic components accurately extend into the soldering holes on the circuit board. Due to the actual operation and installation, a certain tolerance will inevitably be generated. In order to absorb the tolerance, the soldering holes on the circuit board are often enlarged, thereby improving the success rate of assembly. However, in actual production, due to the increase in the diameter of the welding hole, poor welding and tin overflow are prone to occur during welding, resulting in a low yield rate of the final product. Based on the above problems, the present application provides a circuit board welding tool, which is used to absorb the tolerance generated by assembly and improve the yield rate of the product on the basis of improving the success rate of assembly.

[0033] In one aspect of the embodiment of the present invention, referring to Figure 1 , a circuit board welding tool 1 is provided, which is used to assist in the welding of components 4 to be welded on a circuit board 3, comprising: a base and a locking portion 13 arranged on the base; the base is used to lock with the circuit board 3 through the locking portion 13; a guide through hole 12 corresponding to the welding hole on the circuit board 3 is also arranged on the base, which is used to guide the pin 41 of the component 4 to be welded to be inserted into the welding hole on the circuit board 3 through the guide through hole 12.

[0034] For example, Figure 1 As shown, the tooling includes a base, a locking portion 13 and a guide through hole 12. The guide through hole 12 is located on the base, and the locking portion 13 is located on one side of the base, which is responsible for locking with the corresponding part on the circuit board 3 so that the base can be fixed to the circuit board 3. At the same time, after the base and the circuit board 3 are fixed, the guide through hole 12 on the base can correspond to the welding hole on the circuit board 3. It should be noted that this correspondence is that the opening of the guide through hole 12 close to the side of the circuit board 3 corresponds to the opening position of the welding hole on the circuit board 3 close to the side of the base, as shown in FIG. Figure 4As shown. Before the pin 41 on the component 4 to be welded is inserted into the welding hole on the circuit board 3, it is necessary to first insert it into the guide through hole 12 on the base. The tolerance generated during assembly is absorbed by the guide through hole 12. At the same time, the guide through hole 12 can also guide the pin 41 of the component 4 to be welded to be accurately inserted into the welding hole on the circuit board 3, thereby completing the assembly of the component 4 to be welded and the circuit board 3. After the circuit board 3 assembled with the component 4 to be welded is installed and fixed with the electronic product, it is convenient for the subsequent process to weld the pin 41 of the component 4 to be welded to the circuit board 3, which not only avoids the damage of the component 4 to be welded caused by the assembly stress generated when welding first and then installing the circuit board 3. At the same time, it also avoids the poor welding caused by absorbing the assembly error of the pin 41 and the welding hole by excessively enlarging the welding hole of the circuit board 3 during the existing welding. It is conducive to improving the welding yield, reducing the phenomenon of tin overflow and poor welding during welding, and improving the assembly efficiency and finished product rate of the circuit board 3 and the component 4 to be welded.

[0035] At the same time, by adopting the tooling in this application, it is not only possible to ensure that the pins 41 of the components 4 to be welded are accurately inserted into the welding holes on the circuit board 3, but also possible to utilize the process of assembling first and then welding. Before welding the components 4 to be welded, the components 4 to be welded with heat dissipation requirements are first attached to the radiator 6, and then welded, which effectively avoids the existing process of welding first and then fixing for some components that need to be close to the radiator 6, resulting in the risk of some components not being close or having large stress due to manufacturing or assembly errors. The performance of the final product is further improved.

[0036] The fixing method of the base and the circuit board 3 depends on the specific setting form of the locking portion 13. Three fixing methods are schematically given below:

[0037] One of:

[0038] Optionally, the locking portion 13 includes a first elastic member 131 and a second elastic member 132 which are relatively matched and arranged on the base; an extension portion 133 is respectively arranged at the other end of the first elastic member 131 and the second elastic member 132, and the extension direction of the extension portion 133 intersects with the axial direction of the elastic member; the first elastic member 131 and the second elastic member 132 are inserted into the locking hole of the circuit board 3 along their axial direction, and after being tensioned with the inner wall of the locking hole, the extension portion 133 abuts against the circuit board 3 to enable the base to be clamped with the circuit board 3.

[0039] For example, the locking portion 13 may be connected to the circuit board 3 in the form of a buckle, and specifically, may be an elastic buckle structure composed of a first elastic member 131, a second elastic member 132, and extensions 133 arranged at both ends thereof. Figure 6As shown, the first elastic member 131 and the second elastic member 132 are arranged on the same side of the base, and a gap is formed between the first elastic member 131 and the second elastic member 132, that is, the first elastic member 131 and the second elastic member 132 can form a through groove in cooperation with the base. At the same time, an extension portion 133 is arranged at the end of the first elastic member 131 and the second elastic member 132 close to the circuit board 3, wherein the extension direction of the extension portion 133 intersects with the axial direction of the first elastic member 131 and the second elastic member 132, that is, it protrudes outward on the side wall of the first elastic member 131 and the second elastic member 132, and the extension direction of the extension portion 133 on the first elastic member 131 is opposite to that of the extension portion 133 on the second elastic member 132. The through groove is used to accommodate the bending length of the first elastic member 131 and the second elastic member 132 along the radial direction of the lock hole when the ends of the first elastic member 131 and the second elastic member 132 provided with the extension portion 133 extend into the lock hole on the circuit board 3. Therefore, the width of the gap between the first elastic member 131 and the second elastic member 132 must be greater than or equal to the sum of the bending lengths of the first elastic member 131 and the second elastic member 132 along the radial direction of the lock hole. After the first elastic member 131 and the second elastic member 132 are bent relative to each other due to the inner wall of the lock hole, the base box is continuously pushed closer to the circuit board 3 until the extensions 133 arranged at the ends of the first elastic member 131 and the second elastic member 132 completely pass through the lock hole. At this time, the first elastic member 131 and the second elastic member 132 will generate a rebound force before restoring the deformation, so as to push the two extensions 133 away from each other. Figure 6 As shown, the distance between the farthest points of the two extensions 133 is greater than the aperture of the locking hole on the circuit board 3. At this time, the two extensions 133 will abut against the side of the circuit board 3 away from the base, thereby completing the locking of the base and the circuit board 3. At the same time, the guide through hole 12 on the base corresponds to the hole position of the welding hole on the circuit board 3. Figure 6 As shown, the distance between the farthest points of the first elastic member 131 and the second elastic member 132 and the matching parts of the inner wall of the lock hole should be smaller than the diameter of the inner wall of the lock hole.

[0040] In another embodiment, the first elastic member 131 and the second elastic member 132 may be separately provided and located at both ends of the base. Similarly, extension portions 133 may be provided at the ends of both members. The extension directions of the two extension portions 133 may be opposite or opposite. When the two members are pressed into the locking holes correspondingly provided on the circuit board 3, the first elastic member 131 and the second elastic member 132 may be bent. After the extension portion 133 passes through the locking hole, the two members generate a rebound force, so that the extension portion 133 can abut against the circuit board 3 to complete the locking of the base and the circuit board 3.

[0041] The structural setting of the elastic buckle can not only form a detachable connection relationship between the base and the circuit board 3, but also reduce the stress impact on the circuit board 3 by means of flexible clamping, thereby reducing unnecessary damage caused by assembly.

[0042] It should be noted that the first elastic member 131 and the second elastic member 132 are deformable and have a resilience to restore the deformation after deformation. The height of the first elastic member 131 and the second elastic member 132, that is, the length of the two in the axial direction, should be such that the extension 133 set at the ends of the two can pass through the welding hole and can abut against the circuit board 3. In actual setting, a certain small gap can be formed between the extension 133 and the circuit board 3. The first elastic member 131 and the second elastic member 132 can be as follows: Figure 2 The elastic column shown may also be an elastic sheet or the like.

[0043] Optionally, a guide surface is further formed on the extension portion 133 for guiding the first elastic member 131 and the second elastic member 132 to be inserted into the locking hole of the circuit board 3 .

[0044] For example, Figure 5 As shown, in order to facilitate the insertion of the first elastic member 131 and the second elastic member 132 into the lock hole on the circuit board 3, a guide surface can also be provided on the extension portion 133, and the first elastic member 131 and the second elastic member 132 can be quickly inserted into the lock hole of the circuit board 3 through the guiding effect of the guiding inclined surface. The guiding inclined surface can be effectively used to absorb the assembly tolerance, and at the same time, the assembly efficiency of the entire product can be improved. It should be noted that the guiding surface can be a bevel or a curved surface, and this application does not limit it.

[0045] Another form of locking:

[0046] Optionally, the locking portion 13 includes a locking column arranged on the base and an external thread arranged on the outer periphery of the locking column, and the locking column is threadedly connected to the locking hole of the circuit board 3 through the external thread.

[0047] For example, a thread is provided in the lock hole on the circuit board 3, and a locking column is provided on the same side of the base, and an external thread is provided on the outer peripheral surface of the locking column, and the locking column and the inner wall of the lock hole of the circuit board 3 are threadedly connected to form a fixed relationship between the two. The threaded connection form has a more mature manufacturing process and a lower manufacturing cost.

[0048] Another form of locking:

[0049] The base is fixed to the circuit board 3 by glue bonding, so that the guide through hole 12 can easily introduce the pin 41 of the component 4 to be welded into the welding hole on the circuit board 3. The bonding method has a low assembly cost and does not require additional hardware, which can effectively reduce the manufacturing cost.

[0050] Optionally, the aperture of the guide through hole 12 on the side close to the circuit board 3 is smaller than the aperture of the side away from the circuit board 3 .

[0051] For example, in order to facilitate the rapid and accurate introduction of the component 4 to be soldered into the soldering hole on the circuit board 3, the aperture of the guide through hole 12 close to the circuit board 3 can be set smaller than the aperture of the guide through hole 12 away from the circuit board 3. Figure 4 As shown, a through hole similar to a trumpet shape is formed. For the convenience of description, the aperture of the guide through hole 12 close to the circuit board 3 is called the inner aperture, and the aperture away from the circuit board 3 is called the outer aperture. After the end of the pin 41 of the component 4 to be welded deviates from the welding hole by a certain distance (the distance should be smaller than the outer aperture) due to tolerance, since the pin 41 of the component 4 to be welded is made of flexible material, it will first extend into the guide through hole 12 through one end of the outer aperture and abut against the inner wall of the guide through hole 12. Due to the setting of the trumpet-shaped through hole, the pin 41 will be deformed and extend out of one side of the inner aperture under the guidance of the inner wall of the guide through hole 12, and finally enter the welding hole corresponding to the opening on the inner aperture side. It should be noted that, Figure 4 As shown, the diameter of the welding hole near the guide through hole 12 is larger than or equal to the opening diameter of the inner diameter side of the guide through hole 12, so that the pin 41 can be smoothly inserted into the welding hole. The inner diameter of the guide through hole 12 should be larger than the diameter of the pin 41 of the component 4 to be welded.

[0052] Optionally, the guide through hole 12 is a tapered hole.

[0053] For example, Figure 2 As shown, the guide through hole 12 is a tapered hole, that is, the inner wall of the guide through hole 12 is a tapered surface. When the end of the pin 41 abuts against the tapered inner wall of the guide through hole 12, the contact stress between the two can be effectively reduced. Compared with the arc-shaped inner wall, the impact on the pin 41 is smaller, and when the guide pin 41 absorbs the assembly tolerance, it can be smoother.

[0054] In addition, if Figure 2 As shown, a small section of cylindrical hole can also be provided at the small diameter end of the tapered hole to improve the strength of the guide through hole 12 at this location and to increase the service life of the tooling in the present application.

[0055] Optionally, the base includes a base body 11 and an isolation boss 14 disposed on the base body 11 ; the isolation boss 14 is disposed on the same side as the locking portion 13 , and the isolation boss 14 is used to abut against the circuit board 3 after the locking portion 13 is locked with the circuit board 3 .

[0056] For example, in order to avoid excessive interference of the base on the circuit board 3, an isolation boss 14 can be provided between the base body 11 and the circuit board 3, that is, on the same side of the base body 11 and the locking portion 13. After the base body 11 is locked with the circuit board 3 by the locking portion 13, the two can be isolated by the isolation boss 14 to avoid unnecessary damage to the structure on the circuit board 3 caused by the large area of ​​the base body 11 being attached to the circuit board 3. There can be multiple isolation bosses 14, which can be evenly distributed on the base body 11 or randomly arranged on the base body 11, and their heights (from the base to the circuit board 3) can be consistent or inconsistent. The specific setting can be reasonably selected according to actual needs.

[0057] Optionally, the isolation boss 14 is located between the base body 11 and the locking portion 13 .

[0058] For example, Figure 6 As shown, the isolation boss 14 can also be directly arranged between the base body 11 and the locking portion 13, that is, the isolation boss 14 is arranged on the base in sequence, and the locking portion 13 is arranged on the isolation boss 14. After locking, the isolation boss 14 is just located between the circuit board 3 and the base body 11. It should be noted that, if Figure 6 As shown, the diameter of the isolation boss 14 is larger than the diameter of the locking hole.

[0059] Optionally, the base is made of insulating material.

[0060] For example, in order to avoid interference with the circuit board 3 and components, the base can be set to an insulating material, thereby providing insulation protection for the circuit board 3, etc., to avoid leakage and short circuit of the circuit board 3 due to the conductive material of the base. It can be plastic, such as polyvinyl chloride, polypropylene, etc. It can also be rubber, etc.

[0061] Optionally, the locking portions 13 include a plurality of locking portions 13 , which are spaced apart and arranged on the same side of the base; the guiding through holes 12 include a plurality of guiding through holes 12 , which correspond one-to-one to the plurality of welding holes on the circuit board 3 .

[0062] For example, Figure 2As shown, the locking parts 13 can be multiple, for example, two, three, four, etc., and when they are set, they can be set at a certain interval (the spacing between different locking parts 13 can be different, and can be reasonably set according to actual production needs). In order to form a more stable locking, multiple locking parts 13 can also be set on the same side of the base. Similarly, there can be multiple guide holes 12, and when they are set, they should correspond one by one to the multiple welding holes on the circuit board 3 when the base and the circuit board 3 are locked, so that the pins 41 of the components 4 to be welded can be smoothly inserted into the welding holes.

[0063] like Figure 3 As shown, when the tooling in the present application is used, lock holes of appropriate size can be opened at the positions of the circuit board 3 corresponding to the multiple guide through holes 12 and the multiple locking parts 13. Then the locking part 13 is inserted into the lock hole corresponding to the circuit board 3 for locking. If the components 4 to be welded have heat dissipation requirements, the components 4 to be welded are fixed at a suitable position on the radiator 6, and the tooling mounted on the circuit board 3 is oriented toward the components 4 to be welded. The circuit board 3 is fixed at the corresponding position of the radiator 6 under the action of other auxiliary guides. During the process, the pins 41 of the components 4 to be welded will automatically slide along the guide through holes 12 into the corresponding welding holes of the circuit board 3. After locking the circuit board 3, the assembly is completed and the subsequent welding can begin.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A circuit board welding tool, used to assist in welding components to be welded on a circuit board, characterized in that: include: A base and a locking portion disposed on the base; The base is used to lock with the circuit board through the locking portion; the base is also provided with a guide through hole corresponding to the welding hole on the circuit board, which is used to guide the pin of the component to be welded to be inserted into the welding hole on the circuit board through the guide through hole; The base includes a base body and an isolation boss arranged on the base body; the isolation boss is arranged on the same side as the locking portion, and the isolation boss is used to abut against the circuit board after the locking portion is locked with the circuit board; the isolation boss is located between the base body and the locking portion.

2. The circuit board welding tool as claimed in claim 1, characterized in that: The locking portion includes a first elastic member and a second elastic member that are relatively matched and arranged on the base; an extension portion is respectively arranged at the other end of the first elastic member and the second elastic member, and the extension direction of the extension portion intersects with the axial direction of the elastic member; the first elastic member and the second elastic member are inserted into the locking hole of the circuit board along their axial direction, and after being tensioned with the inner wall of the locking hole, the extension portion abuts against the circuit board to enable the base to be clamped with the circuit board.

3. The circuit board welding tool as claimed in claim 2, characterized in that: A guide surface is also formed on the extension portion for guiding the first elastic member and the second elastic member to be inserted into the locking hole of the circuit board.

4. The circuit board welding tool as claimed in claim 1, characterized in that: The locking portion includes a locking column arranged on the base and an external thread arranged on the outer periphery of the locking column, and the locking column is threadedly connected to the locking hole of the circuit board through the external thread.

5. The circuit board welding tool as claimed in claim 1, characterized in that: The aperture of the guide through hole at a side close to the circuit board is smaller than the aperture of the guide through hole at a side away from the circuit board.

6. The circuit board welding tool as claimed in claim 5, characterized in that: The guide through hole is a tapered hole.

7. The circuit board welding tool according to any one of claims 1 to 6, characterized in that: The base is made of insulating material.

8. The circuit board welding tool according to any one of claims 1 to 6, characterized in that: The locking parts include a plurality of locking parts, which are arranged at intervals on the same side of the base; the guiding through holes include a plurality of guiding through holes, which correspond one-to-one to the plurality of welding holes on the circuit board.

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