CN111604566A - A circuit board welding tool - Google Patents

Abstract

The invention provides a circuit board welding tool, which relates to the technical field of electronic devices, and includes a base and a locking portion. Wherein, the locking part is arranged on the base, and at the same time, a guiding through hole is also arranged on the base. The base is locked with the circuit board by the locking portion, so that the guiding through holes can correspond to the soldering holes on the circuit board. At this time, when the pins of the components to be soldered can pass through the guiding through holes on the base, they can be accurately inserted into the soldering holes on the circuit board after being guided, which facilitates soldering in the subsequent process and avoids assembly stress caused by first soldering. Damage to the components to be welded. At the same time, it also avoids the use of excessively expanding the solder holes of the circuit board to absorb the assembly errors of the pins and solder holes during the existing soldering process, which is conducive to improving the yield of soldering and effectively reducing the phenomenon of overflowing tin and poor soldering during the soldering process. , which improves the assembly efficiency and yield of circuit boards and components to be soldered.

Description

A circuit board welding tool

technical field

The invention relates to the technical field of electronic devices, in particular to a circuit board welding tool.

Background technique

Most of the printed circuit boards in electronic products are soldered components. The usual practice in the industry is to solder the components on the printed circuit board first, and then install the printed circuit board to the radiator and other electronic product packages. superior. Although this can simplify the operation process, for some relatively large devices, if the above method is used to pre-solder the components on the printed circuit board, and then when the printed circuit board is mounted on the heat sink or package, the printed circuit board is The printed circuit board will be subjected to large deformation stress, which may cause damage to some components on the printed circuit board.

In view of the above-mentioned industry problems, there are also some new methods that try to use the process of locking the components and the printed circuit board first, and then soldering, because this process requires the welding pins of the components to be smoothly placed into the printed circuit board. In the hole, the usual practice is to expand the welding hole of the printed circuit board to absorb the assembly error with the welding pin, but this method often makes the welding hole too large, resulting in poor subsequent welding, overflowing tin, etc., which in turn makes the product Yield is low.

SUMMARY OF THE INVENTION

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

To achieve the above purpose, the technical solutions adopted in the embodiments of the present invention are as follows:

In one aspect of the embodiments of the present invention, a circuit board welding tool is provided, which is used to assist the welding of components to be welded on the circuit board, including: a base and a locking portion disposed on the base; the base is used for passing through the locking portion It is locked with the circuit board; the base is also provided with guide through holes corresponding to the welding holes on the circuit board, which are used to guide the pins of the components to be welded into the welding holes on the circuit board through the guide through holes.

Optionally, the locking portion includes a first elastic member and a second elastic member which 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 is the same as that of the base. The axial direction of the elastic member intersects; the first elastic member and the second elastic member are inserted into the lock hole of the circuit board along their axial direction, and after being tensioned with the inner wall of the lock hole, they abut with the circuit board through the extension part to make the base Connect with the circuit board.

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

Optionally, the locking portion includes a locking post provided on the base and an external thread provided on the outer periphery of the locking post, and the locking post is threadedly connected to the locking hole of the circuit board through the external thread.

Optionally, the hole diameter of the guiding through hole on the side close to the circuit board is smaller than the hole diameter on the side away from the circuit board.

Optionally, the guide through hole is a tapered hole.

Optionally, the base includes a base body and an isolation boss disposed on the base body; the isolation boss is provided on the same side as the locking portion, and the isolation boss is used to abut against the circuit board after the locking portion and the circuit board are locked. catch.

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

Optionally, the base is made of insulating material.

Optionally, the locking portion includes a plurality of locking portions, and the locking portions are arranged on the same side of the base at intervals; the guiding through holes include a plurality, and the plurality of guiding through holes correspond to the plurality of welding holes on the circuit board one-to-one.

The beneficial effects of the present invention include:

The invention provides a circuit board welding tool, which includes a base and a locking part. Wherein, the locking part is arranged on the base, and at the same time, a guiding through hole is also arranged on the base. The base is locked with the circuit board by the locking portion, so that the guiding through holes can correspond to the soldering holes on the circuit board. At this time, when the pins of the components to be soldered can pass through the guiding through holes on the base, they can be accurately inserted into the soldering holes on the circuit board after being guided, which is convenient for subsequent soldering processes and avoids assembly stress caused by first soldering. Damage to the components to be welded. At the same time, it also avoids the use of excessively expanding the solder holes of the circuit board to absorb the assembly errors of the pins and solder holes during the existing soldering process, which is conducive to improving the yield of soldering and effectively reducing the phenomenon of overflowing tin and poor soldering during the soldering process. , which improves the assembly efficiency and yield of circuit boards and components to be soldered.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is one of the structural schematic diagrams of a circuit board welding tool provided in an embodiment of the present invention;

FIG. 2 is a second schematic structural diagram of a circuit board welding tool provided in an embodiment of the present invention;

3 is a third schematic structural diagram of a circuit board welding tool provided in an embodiment of the present invention;

FIG. 4 is a fourth schematic structural diagram of a circuit board welding tool provided by an embodiment of the present invention;

5 is a fifth schematic structural diagram of a circuit board welding tool provided by an embodiment of the present invention;

FIG. 6 is a sixth schematic structural diagram of a circuit board soldering tool provided by an embodiment of the present invention.

Icon: 1- circuit board welding tool; 3- circuit board; 4- components to be welded; 41- pin; 6- heat sink; 11- base body; 12- guide through hole; 13- locking part; 131- 132-second elastic part; 133-extension part; 14-isolation boss.

Detailed ways

In order to make the purposes, 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 with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. It should be noted that, in the case of no conflict, various features in the embodiments of the present invention may be combined with each other, and the combined embodiments still fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

With the rapid development of the economy and the acceleration of the pace of life, people often improve the efficiency of life by means of automation. However, the existing automation method mainly uses the circuit board as a carrier to arrange electronic components on it, so as to realize automatic control through the combination of software and hardware. In order to improve the use range of electronic components, components, circuit boards and electronic products need to be fixed, so that electronic components can have a certain degree of anti-shock and anti-drop performance. The traditional practice in the industry is to solder the components on the circuit board first, and then install the circuit board on the package of the electronic product. When the circuit board is installed on the package of an electronic product, the circuit board will be subjected to a large deformation stress, which will lead to the vulnerable components that have been soldered. In order to avoid this situation, the current practice in the industry is usually to lock the electronic components, circuit boards and electronic product packages first, and then perform the soldering process. However, in this kind of process, it is necessary to make the pins of electronic components can accurately extend into the welding holes on the circuit board. Due to the actual operation and installation, certain tolerances will inevitably occur. In order to absorb the tolerances, the circuit is often used. The welding holes on the board are enlarged, thereby improving the success rate of assembly. However, in actual production, due to the increased diameter of the welding hole, poor welding and tin overflow are likely to occur during welding, resulting in a low yield of the final product. Based on the above problems, the present application provides a circuit board soldering tool, which is used to absorb the tolerance generated by the assembly and improve the yield of the product on the basis of improving the success rate of the assembly.

In one aspect of the embodiment of the present invention, referring to FIG. 1 , a circuit board welding tool 1 is provided for assisting the welding of components 4 to be welded on the circuit board 3 , including: a base and a locking portion 13 disposed on the base The base is used for locking with the circuit board 3 through the locking portion 13; the base is also provided with a guide through hole 12 corresponding to the welding hole on the circuit board 3, which is used to guide the pins 41 of the components 4 to be welded through the The guide through holes 12 are inserted into solder holes on the circuit board 3 .

Illustratively, as shown in FIG. 1 , the tool 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 with the circuit board 3, and at the same time , after the base and the circuit board 3 are fixed, the guide through holes 12 on the base can correspond to the welding holes on the circuit board 3 . It should be noted that the corresponding relationship is that the guide through holes 12 are close to the circuit board 3 The opening on one side corresponds to the opening on the side of the soldering hole on the circuit board 3 close to the base, as shown in FIG. 4 . Before the pins 41 on the components 4 to be soldered are inserted into the soldering holes on the circuit board 3, they need to be inserted into the guiding through holes 12 on the base first, and the guiding through holes 12 are used to absorb the tolerances generated during assembly. The guiding through holes 12 can also guide the pins 41 of the components to be soldered 4 to be accurately inserted into the soldering holes on the circuit board 3 , thereby completing the assembly of the components to be soldered 4 and the circuit board 3 . After the circuit board 3 assembled with the components 4 to be welded is mounted and fixed to the electronic product, it is convenient for the subsequent process to weld the pins 41 of the components 4 to be welded to the circuit board 3, which not only avoids the need to weld first and then install the circuit. The assembly stress generated during the board 3 causes damage to the components 4 to be welded. At the same time, it is also avoided that the welding hole of the circuit board 3 is excessively enlarged to absorb the poor welding caused by the assembly error between the pin 41 and the welding hole during the existing welding. It is beneficial to improve the yield of welding, reduce the phenomenon of tin overflow and poor welding during the welding process, and improve the assembly efficiency and yield of the circuit board 3 and the components to be welded 4 .

At the same time, by using the tooling in the present application, not only can the pins 41 of the components to be welded 4 be accurately inserted into the welding holes on the circuit board 3, but also the process of assembling and then welding can be used to weld the components 4 to be welded. Before, the components 4 to be welded that have heat dissipation requirements are first attached to the 6 pieces of the radiator, and then soldered, which effectively avoids the use of the existing components that need to be attached to the radiator 6 to be welded first and then fixed. Due to manufacturing or assembly errors, some components are not tightly attached or there is a risk of greater stress. Further improved performance of the final product.

For the fixing method of the base and the circuit board 3, depending on the specific arrangement of the locking portion 13, three fixing methods are schematically given below:

one of a kind:

Optionally, the locking portion 13 includes a first elastic member 131 and a second elastic member 132 that are relatively matched on the base; extending portions 133 are respectively provided at the other ends of the first elastic member 131 and the second elastic member 132, 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, they extend The portion 133 is in contact with the circuit board 3 so that the base is snapped with the circuit board 3 .

Exemplarily, the locking portion 13 may be connected to the circuit board 3 in the form of a buckle, and specifically, it may be composed of a first elastic member 131, a second elastic member 132 and the extension portions 133 disposed at both ends of the locking portion 131. The structure of the elastic buckle. As shown in FIG. 6 , the first elastic member 131 and the second elastic member 132 are oppositely disposed 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 A through slot can be formed by cooperating with the second elastic member 132 on the base. At the same time, an extension portion 133 is provided at the ends 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 is the same as the axis direction of the first elastic member 131 and the second elastic member 132 The intersection, that is, the side walls of the first elastic member 131 and the second elastic member 132 protrude outward, and the extension portion 133 on the first elastic member 131 and the extension portion 133 on the second elastic member 132 extend in opposite directions . The through groove is used for accommodating the first elastic member 131 and the second elastic member 132 to bend toward each other when one end of the first elastic member 131 and the second elastic member 132 provided with the extension portion 133 extends into the locking hole on the circuit board 3 . The bending length along the direction of the keyhole caused by the bending deformation. 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 in the direction of the lock hole. After the first elastic member 131 and the second elastic member 132 are bent to each other due to the limitation of the inner wall of the lock hole, the base box is continuously pushed in the direction close to the circuit board 3 until the first elastic member 131 and the second elastic member 132 are arranged on the first elastic member 131 and the second elastic member 132 The extension portion 133 at the end completely passes through the locking hole, and at this time, the first elastic member 131 and the second elastic member 132 will generate a resilient force before restoring the deformation, so as to push the two extension portions 133 away from each other. As shown in FIG. 6 , the distance between the farthest points of the two extending portions 133 is greater than the aperture of the key hole on the circuit board 3 . At this time, the two extending portions 133 will abut against the side of the circuit board 3 away from the base, Thus, the locking of the base and the circuit board 3 is completed, and at the same time, the guide through holes 12 on the base are also made to correspond to the holes of the welding holes on the circuit board 3 . As shown in FIG. 6 , the distance between the first elastic member 131 and the second elastic member 132 and the farthest point of the matching portion of the inner wall of the lock hole should be smaller than the diameter of the inner wall of the lock hole.

In another embodiment, the first elastic member 131 and the second elastic member 132 can also be provided separately, and are located at both ends of the base. Similarly, extending portions 133 can be provided at the ends of the two. The extending directions of the portions 133 may be opposite or opposite. When the two are correspondingly disposed in the locking hole on the circuit board 3, the first elastic member 131 and the second elastic member 132 will also be bent. After the extension portion 133 passes through the locking hole, the two elastic members A resilient force is generated by the user, so that the extension portion 133 can abut with the circuit board 3 to complete the locking of the base and the circuit board 3 .

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

It should be noted that, the first elastic member 131 and the second elastic member 132 refer to their own deformability, and after the deformation, they have the resilience before the 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 provided at the ends of the two can pass through the welding hole and can abut with the circuit board 3 . In actual setting, a certain small gap may be formed between the extension portion 133 and the circuit board 3 . The first elastic member 131 and the second elastic member 132 may be elastic columns as shown in FIG. 2 , or may be elastic sheets or the like.

Optionally, a guide surface is also 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 .

For example, as shown in FIG. 5 , in order to facilitate the insertion of the first elastic member 131 and the second elastic member 132 into the lock holes on the circuit board 3 , a guide surface may also be provided on the extension portion 133 , through the guide slope of the guide surface. The guiding function guides the first elastic member 131 and the second elastic member 132 to be quickly inserted into the locking hole of the circuit board 3 . The guide slope can be effectively used to absorb assembly tolerances, and at the same time, the assembly efficiency of the entire product can be improved. It should be noted that the guide surface may be an inclined surface or an arc surface, which is not limited in this application.

Another form of locking:

Optionally, the locking portion 13 includes a locking post provided on the base and an external thread provided on the outer periphery of the locking post, and the locking post is threadedly connected to the locking hole of the circuit board 3 through the external thread.

Illustratively, a thread is provided in the locking hole on the circuit board 3, at the same time, a locking post is provided on the same side of the base, and an outer thread is provided on the outer peripheral surface of the locking post. The inner wall of the lock hole is threadedly connected to form a fixed relationship between the two. In the form of threaded connection, the manufacturing process is more mature and the manufacturing cost is lower.

Another form of locking:

The base is fixed with the circuit board 3 by means of glue bonding, so that the guide through holes 12 can conveniently guide the pins 41 of the components 4 to be welded into the welding holes on the circuit board 3 . The assembly cost of the bonding method is low, and no additional hardware is required, which can effectively reduce the manufacturing cost.

Optionally, the diameter of the guide through hole 12 on the side close to the circuit board 3 is smaller than that on the side away from the circuit board 3 .

For example, in order to quickly and accurately introduce the components 4 to be soldered into the soldering holes on the circuit board 3 , the diameter of the guiding through hole 12 on the side close to the circuit board 3 can also be set smaller than the diameter on the side away from the circuit board 3 . Aperture. That is, as shown in FIG. 4 , a through hole similar to the shape of a horn is formed. For the convenience of description, in this application, the aperture on the side of the guiding through hole 12 close to the circuit board 3 is called the inner aperture, and the aperture on the side away from the circuit board 3 is referred to as the inner aperture. called the outer aperture. After the end of the lead 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 diameter) due to the tolerance, since the lead 41 of the component 4 to be welded is a flexible material, it will first pass through the external One end of the aperture extends into the guide through hole 12 and abuts with the inner wall of the guide through hole 12. Due to the arrangement of the trumpet-shaped through hole, the pin 41 will deform and protrude out under the guidance of the inner wall of the guide through hole 12. One side of the aperture finally enters the welding hole corresponding to the opening of the inner aperture side. It should be noted that, as shown in FIG. 4 , the diameter of the welding hole on the side close to the guide through hole 12 is greater than or equal to the diameter of the opening on the inner diameter side of the guide through hole 12 , so that the pins 41 can be smoothly inserted into the welding hole. . The size of the inner diameter of the guide through hole 12 should be larger than the diameter of the lead 41 of the component 4 to be soldered.

Optionally, the guide through hole 12 is a tapered hole.

For example, as shown in FIG. 2 , the guide through hole 12 is a tapered hole, that is, the inner wall of the guide through hole 12 is a tapered surface. The contact stress between the two is effectively reduced. Compared with the arc-shaped inner wall, the impact on the pins 41 is smaller, and the guide pins 41 can absorb assembly tolerances more smoothly.

In addition, as shown in FIG. 2 , a small section of cylindrical hole can also be provided at the small diameter end of the tapered hole, which is convenient to improve the strength of the guide through hole 12 here and improve the service life of the tooling in the present application.

Optionally, the base includes a base body 11 and an isolation boss 14 disposed on the base body 11; the isolation boss 14 is provided on the same side as the locking portion 13, and the isolation boss 14 is used for connecting the locking portion 13 to the circuit After the board 3 is locked, it abuts against the circuit board 3 .

For example, in order to avoid excessive interference of the base with the circuit board 3 , an isolation boss 14 may also 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 by the locking portion 13 and the circuit board 3, the two can be isolated by the isolation boss 14 to avoid the structure on the circuit board 3 due to the large area of the base body 11 fitting the circuit board 3 to the circuit board 3. cause unnecessary damage. There can be multiple isolation bosses 14, which can be uniformly arranged on the base body 11, or can be randomly arranged on the base body 11, and its height (the direction from the base to the circuit board 3) can be It can be consistent or inconsistent, and the specific settings can be reasonably selected according to actual needs.

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

For example, as shown in FIG. 6 , the isolation bosses 14 may also be directly disposed between the base body 11 and the locking portion 13 , that is, the isolation bosses 14 are arranged on the base in sequence, and the isolation bosses 14 are provided with locking Section 13. After locking, the isolation boss 14 is just located between the circuit board 3 and the base body 11 . It should be noted that, as shown in FIG. 6 , the diameter of the isolation boss 14 is larger than the diameter of the lock hole.

Optionally, the base is made of insulating material.

For example, in order to avoid interference with the circuit board 3 and components, the base can be set as an insulating material, so as to form insulation protection for the circuit board 3, etc., to avoid leakage and short circuit of the circuit board 3 caused by the base being a conductive material. Phenomenon. It can be plastic such as polyvinyl chloride, polypropylene, and the like. It can also be rubber, etc.

Optionally, the locking portion 13 includes a plurality of locking portions 13 arranged at intervals on the same side of the base; the guiding through holes 12 include a plurality of guiding through holes 12 and the plurality of welding holes on the circuit board 3 . A correspondence.

Exemplarily, as shown in FIG. 2 , the locking portions 13 may be multiple, for example, two, three, four, etc., and may be arranged at a certain interval (the interval between different locking portions 13 may be Different, the specific can be set reasonably according to the actual production needs). In order to form a more stable locking, a plurality of locking parts 13 can also be arranged on the same side of the base. Similarly, the number of guiding through holes 12 can also be multiple. When the guide holes 12 are set, they should correspond to the plurality of welding holes on the circuit board 3 one by one when the base and the circuit board 3 are locked, so as to facilitate the subsequent welding of the components. Pin 41 of 4 can be inserted into the soldering hole smoothly.

As shown in FIG. 3 , when using the tooling in the present application, lock holes of appropriate size may be opened at the positions of the circuit board 3 corresponding to the plurality of guiding through holes 12 and the plurality of locking portions 13 first. Then, insert the locking portion 13 into the corresponding locking hole of the circuit board 3 for locking. If the components 4 to be welded have heat dissipation requirements, fix the components 4 to be welded on a suitable position of the radiator 6, and orient the tooling mounted on the circuit board 3 toward the components to be welded 4, and the circuit board 3 is placed in other auxiliary guides. Under the action, it is fixed on the corresponding position of the radiator 6. During the process, the pins 41 of the components 4 to be welded will automatically slide into the corresponding welding holes of the circuit board 3 along the guide through holes 12, and after locking the circuit board 3 The assembly is complete and subsequent welding can begin.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The utility model provides a circuit board welding frock for treat the welding of welding components and parts on the auxiliary circuit board, its characterized in that includes: a base and a locking portion provided on the base; the base is used for being locked with the circuit board through the locking part; and the base is also provided with a guide through hole corresponding to the welding hole on the circuit board and used for guiding the pin of the component to be welded to be inserted into the welding hole on the circuit board through the guide through hole.

2. The circuit board welding tool according to claim 1, wherein the locking part includes a first elastic member and a second elastic member which are relatively and cooperatively arranged on the base; the other ends of the first elastic piece and the second elastic piece are respectively provided with an extending part, and the extending direction of the extending part is intersected with the axial direction of the elastic piece; the first elastic piece and the second elastic piece are inserted into the lock hole of the circuit board along the axial direction of the first elastic piece and the second elastic piece, and after the first elastic piece and the second elastic piece are tensioned with the inner wall of the lock hole, the first elastic piece and the second elastic piece are abutted to the circuit board through the extension part so that the base is clamped with the circuit board.

3. The circuit board welding tool according to claim 2, wherein 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 lock hole of the circuit board.

4. The circuit board welding tool according to claim 1, wherein the locking portion comprises a locking post arranged on the base and an external thread arranged on the periphery of the locking post, and the locking post is in threaded connection with a locking hole of the circuit board through the external thread.

5. The circuit board welding tool according to claim 1, wherein the diameter of the guide through hole on the side close to the circuit board is smaller than the diameter of the guide through hole on the side far from the circuit board.

6. The circuit board welding tool according to claim 5, wherein the guide through hole is a tapered hole.

7. The circuit board welding tool according to claim 1, wherein the base includes a base body and an isolation boss provided on the base body; the isolation boss is arranged on the same side as the locking part and is used for abutting against the circuit board after the locking part and the circuit board are locked.

8. The circuit board welding tool according to claim 7, wherein the isolation boss is located between the base body and the locking portion.

9. The circuit board welding tool according to any one of claims 1 to 8, wherein the base is made of an insulating material.

10. The circuit board welding tool according to any one of claims 1 to 8, wherein the locking parts comprise a plurality of locking parts, and the locking parts are arranged on the same side of the base at intervals; the guide through holes comprise a plurality of guide through holes, and the guide through holes are in one-to-one correspondence with the welding holes on the circuit board.

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