CN212443649U - Circuit board welding tool - Google Patents

Abstract

The utility model provides a circuit board welding frock relates to electron device technical field, including base and sticking department. Wherein, the locking part is arranged on the base, and simultaneously, a guide through hole is also arranged on the base. The base is locked by the locking portion and the circuit board so that the guide through-holes can correspond to the soldering holes on the circuit board. At the moment, when the pin of the component to be welded can pass through the guide through hole on the base, the pin is guided by the guide through hole and then accurately inserted into the welding hole on the circuit board, so that the subsequent process is convenient for welding, and the damage of the component to be welded caused by assembly stress generated by welding is avoided. Meanwhile, the problem that assembly errors of pins and welding holes are absorbed by excessively enlarging the welding holes of the circuit board in the existing welding process is avoided, the welding yield is improved, the phenomena of tin overflow, poor welding and the like in the welding process are effectively reduced, and the assembly efficiency and the yield of the circuit board and components to be welded are improved.

Description

Circuit board welding tool

Technical Field

The utility model relates to an electron device technical field particularly, relates to a circuit board welding frock.

Background

Most of the printed circuit boards in electronic products are soldered components, and the common practice in the industry is to solder the components onto the printed circuit boards and then mount the printed circuit boards onto packages of electronic products such as radiators. Although this simplifies the operation process, for some larger devices, if the components are soldered on the pcb in advance by the above method, then the pcb will be subjected to a large deformation stress when the pcb is mounted on the heat sink or the package, which may cause some devices on the pcb to be damaged.

For the above-mentioned industrial problems, some new methods try to adopt a process of locking a component and a printed circuit board first and then welding, and because the process needs the welding pins of the component to be smoothly put into the welding holes of the printed circuit board, the common method is to enlarge the welding holes of the printed circuit board to absorb assembly errors with the welding pins, but the method often causes the welding holes to be too large, which leads to poor subsequent welding, tin overflow and the like, and further leads to low product yield.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the not enough among the above-mentioned prior art, provide a circuit board welding frock to solve current circuit board and lead to the lower problem of product yield because of the welding hole is too big when the welding.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

the utility model discloses an aspect provides a circuit board welding frock for treat the welding of welding components and parts on the auxiliary circuit board, include: 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.

Optionally, the locking part comprises a first elastic piece and a second elastic piece which are arranged on the base in a relatively matched mode; 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 are tensioned with the inner wall of the lock hole, and then the first elastic piece and the second elastic piece are abutted to the circuit board through the extending portion so that the base is clamped with the circuit board.

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.

Optionally, the locking portion includes a locking post disposed on the base and an external thread disposed on the periphery of the locking post, and the locking post is in threaded connection with the locking hole of the circuit board through the external thread.

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

Optionally, the guiding through hole is a tapered hole.

Optionally, the base comprises a base body and an isolation boss arranged on the base body; the isolation boss is arranged on the same side as the locking part and is used for being abutted against the circuit board after the locking part is locked with the circuit board.

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

Optionally, the base is an insulating material.

Optionally, 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 correspond to the welding holes on the circuit board one to one.

The beneficial effects of the utility model include:

the utility model provides a circuit board welding frock, including base and sticking department. Wherein, the locking part is arranged on the base, and simultaneously, a guide through hole is also arranged on the base. The base is locked by the locking portion and the circuit board so that the guide through-holes can correspond to the soldering holes on the circuit board. At the moment, when the pin of the component to be welded can pass through the guide through hole on the base, the pin is guided by the guide through hole and then accurately inserted into the welding hole on the circuit board, so that the subsequent process is convenient for welding, and the damage of the component to be welded caused by assembly stress generated by welding is avoided. Meanwhile, the problem that assembly errors of pins and welding holes are absorbed by excessively enlarging the welding holes of the circuit board in the existing welding process is avoided, the welding yield is improved, the phenomena of tin overflow, poor welding and the like in the welding process are effectively reduced, and the assembly efficiency and the yield of the circuit board and components to be welded are improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a circuit board welding tool according to an embodiment of the present invention;

fig. 2 is a second schematic structural diagram of a circuit board welding tool according to an embodiment of the present invention;

fig. 3 is a third schematic structural view of a circuit board welding tool according to an embodiment of the present invention;

fig. 4 is a fourth schematic structural view of a circuit board welding tool according to an embodiment of the present invention;

fig. 5 is a fifth schematic structural view of a circuit board welding tool according to an embodiment of the present invention;

fig. 6 is a sixth schematic view of a structure of a circuit board welding tool according to an embodiment of the present invention.

Icon: 1-a circuit board welding tool; 3-a circuit board; 4-components to be welded; 41-pin; 6-a radiator; 11-a base body; 12-a guide through hole; 13-a locking portion; 131-a first elastic member; 132-a second elastic member; 133-an extension; 14-isolating the boss.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented 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 are still within the scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained 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", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

With the rapid development of economy and the acceleration of life rhythm, people often improve the life efficiency through an automatic means. In the existing automatic realization mode, a circuit board is mainly used as a carrier on which electronic components are arranged, so that automatic control is realized through the combination of software and hardware. In order to improve the application range of the electronic component, the circuit board and the electronic product need to be fixed, so that the electronic component can have a certain degree of shock-proof and drop-resistant performance. The traditional method in the industry is that the components are welded on the circuit board, and then the circuit board is installed on the package of the electronic product, although the operation process is simple, for some large-scale components, when the large circuit board is installed on the package of the electronic product, the circuit board bears large deformation stress, and then the welded components are easy to damage. To avoid this situation, the current industry generally uses a process of locking the electronic components, the circuit board and the electronic product package and then performing soldering. However, in the process, the pins of the electronic components need to be accurately inserted into the welding holes on the circuit board, and certain tolerance is inevitably generated during actual operation and installation, so that the welding holes on the circuit board are increased to absorb the tolerance, and the assembly success rate is improved. However, in actual production, since the diameter of the welding hole is increased, poor welding, tin overflow, and the like are likely to occur during welding, resulting in a low yield of the final product. This application provides a circuit board welding frock based on above-mentioned problem, utilizes it to absorb the tolerance that the assembly produced and then on the basis of improving the success rate of assembly, improves the yield of product.

The utility model discloses an aspect, refer to fig. 1, provide a circuit board welding frock 1 for treat the welding of welding components and parts 4 on the auxiliary circuit board 3, include: a base and a locking portion 13 provided on the base; the base is used for locking with the circuit board 3 through the locking part 13; a guiding through hole 12 corresponding to the soldering hole on the circuit board 3 is also provided on the base for guiding the pin 41 of the component 4 to be soldered to be inserted into the soldering hole on the circuit board 3 through the guiding through hole 12.

Illustratively, as shown in fig. 1, the tool includes a base, a locking portion 13, and a guide through-hole 12. Wherein, the guiding through hole 12 is located on the base, the locking portion 13 is located on one side of the base, and it is responsible for locking with the corresponding position on the circuit board 3, so as to fix the base with the circuit board 3 together, and at the same time, after the base is fixed with the circuit board 3, the guiding through hole 12 located on the base can correspond to the welding hole on the circuit board 3, it should be noted that, this kind of corresponding relation is that the open hole on one side of the guiding through hole 12 close to the circuit board 3 corresponds to the open hole position on one side of the welding hole close to the base on the circuit board 3, as shown in fig. 4. Before the pins 41 of the component 4 to be soldered are inserted into the soldering holes on the circuit board 3, the pins are required to be inserted into the guiding through holes 12 on the base, the guiding through holes 12 are used for absorbing the tolerance generated during assembly, and meanwhile, the pins 41 of the component 4 to be soldered can be guided to be accurately inserted into the soldering holes on the circuit board 3 by the guiding through holes 12, so that the component 4 to be soldered and the circuit board 3 are assembled. After the circuit board 3 assembled with the components 4 to be welded and the electronic product are installed and fixed, the pins 41 of the components 4 to be welded are conveniently welded to the circuit board 3 by the subsequent process, and therefore the damage of the components 4 to be welded, caused by assembly stress generated when the circuit board 3 is installed later, due to welding in advance is avoided. Meanwhile, poor welding caused by assembly errors of the pins 41 and the welding holes due to excessive enlargement of the welding holes of the circuit board 3 in the conventional welding process is avoided. The method is beneficial to improving the welding yield, reducing the phenomena of tin overflow, poor welding and the like in the welding process, and improving the assembly efficiency and the yield of the circuit board 3 and the component 4 to be welded.

Simultaneously, through adopting the frock in this application, not only can guarantee to treat that welding components and parts 4 pin 41 accurately inserts the welding hole on circuit board 3, can also utilize the process of welding after the assembly earlier simultaneously, will treat welding components and parts 4 welding before welding, will treat welding components and parts 4 laminating on 6 radiator to treating that have the heat dissipation demand earlier, then at the welding, effectual having avoided present adopting the process of welding after fixed to some components and parts that need paste radiator 6 tightly, cause some components and parts because the subsides that manufacturing or assembly error brought are not tight or have the risk of great stress. Further improving the properties of the final product.

As for the fixing manner of the base and the circuit board 3, depending on the specific arrangement form of the locking portion 13, three fixing manners are schematically given as follows:

one of them:

optionally, the locking portion 13 includes a first elastic member 131 and a second elastic member 132 which are relatively fittingly disposed on the base; the other ends of the first elastic member 131 and the second elastic member 132 are respectively provided with an extension 133, and the extension direction of the extension 133 intersects with the axial direction of the elastic members; the first elastic member 131 and the second elastic member 132 are inserted into the locking hole of the circuit board 3 along the axial direction thereof, and after being tensioned with the inner wall of the locking hole, the first elastic member 131 and the second elastic member 132 are abutted against the circuit board 3 through the extending portion 133 so as to clamp the base to the circuit board 3.

For example, the locking part 13 may be connected to the circuit board 3 by a snap, and specifically, may be a structure in which the first elastic member 131, the second elastic member 132, and the extending parts 133 disposed at both ends thereof constitute one elastic snap. 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 and the second elastic member 132 can form a through slot in cooperation with the base. Meanwhile, the first elastic member 131 and the second elastic member 132 are provided with an extension 133 at ends thereof adjacent to the circuit board 3, wherein the extension 133 extends in a direction intersecting the axial direction of the first elastic member 131 and the second elastic member 132, i.e., outwardly protrudes on the sidewalls of the first elastic member 131 and the second elastic member 132, and the extension 133 on the first elastic member 131 is opposite to the extension 133 on the second elastic member 132. The through slot is used for accommodating a bending length along the radial direction of the locking hole generated when the first elastic member 131 and the second elastic member 132 are bent and deformed oppositely when one end of the first elastic member 131 and the second elastic member 132, which is provided with the extending portion 133, extends into the locking 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 lengths of the bends of the first elastic member 131 and the second elastic member 132 in the radial direction of the locking hole. After the first elastic member 131 and the second elastic member 132 are bent due to the inner wall of the lock hole, the direction of the base box approaching the circuit board 3 is continuously pushed until the extending portions 133 arranged at the end portions of the first elastic member 131 and the second elastic member 132 completely penetrate through the lock hole, and at this time, the first elastic member 131 and the second elastic member 132 generate a resilience force before the recovery deformation, so that the two extending portions 133 are far away. As shown in fig. 6, the distance between the farthest points of the two extending portions 133 is greater than the hole diameter of the locking 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, thereby completing the locking of the base and the circuit board 3, and at the same time, the guiding through hole 12 on the base corresponds to the hole position of the welding hole on the circuit board 3. As shown in fig. 6, the distance between the farthest points of the engaging portions of the first and second elastic members 131 and 132 with the inner wall of the locking hole should be smaller than the diameter of the inner wall of the locking hole.

In another embodiment, the first elastic member 131 and the second elastic member 132 may be separately disposed and located at two ends of the base, and similarly, the two ends may be further provided with extending portions 133, and the extending directions of the two extending portions 133 may be opposite or opposite. When the two are pressed into the locking holes correspondingly formed in the circuit board 3, the first elastic member 131 and the second elastic member 132 are bent, and after the extending portion 133 passes through the locking holes, the extending portion 133 and the circuit board 3 are rebounded, so that the extending portion 133 can be abutted to the circuit board 3 to lock the base and the circuit board 3.

The structure setting of elasticity buckle not only can make base and circuit board 3 form detachable connection relation, simultaneously, can also utilize the mode of flexible joint to reduce the stress impact to circuit board 3, reduces because of the unnecessary damage that the assembly leads to.

Note that the first elastic member 131 and the second elastic member 132 are deformable and have a resilient force after deformation thereof before returning to the deformed state. The heights of the first elastic member 131 and the second elastic member 132, i.e., the lengths of both in the axial direction, are preferably such that the extending portions 133 provided at both ends can pass through the soldering holes and can be brought into contact with the circuit board 3. In actual arrangement, a certain slight gap may be formed between the extension 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, elastic sheets, and the like.

Optionally, a guide surface 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 is further formed on the extension 133.

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 locking hole of the circuit board 3, a guide surface may be further provided on the extension 133, and the first elastic member 131 and the second elastic member 132 may be guided to be quickly inserted into the locking hole of the circuit board 3 by the guiding function of the guide slope. The guide inclined plane can be effectively utilized to absorb assembly tolerance, and meanwhile, the assembly efficiency of the whole 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 the present application.

Another form of locking:

optionally, the locking portion 13 includes a locking post disposed on the base and an external thread disposed on the periphery of the locking post, and the locking post is in threaded connection with the locking hole of the circuit board 3 through the external thread.

Illustratively, a screw thread is provided in the lock hole of the circuit board 3, and at the same time, a lock post is provided on the same side of the base, and an external screw thread is provided on the outer peripheral surface of the lock post, so that the lock post and the inner wall of the lock hole of the circuit board 3 are connected by screw threads, thereby forming a fixed relationship therebetween. The threaded connection mode has the advantages of more mature manufacturing process and lower manufacturing cost.

In yet another form of locking:

the base is fixed with the circuit board 3 in a glue solution bonding mode, so that the lead through hole 12 is convenient to lead the pin 41 of the component 4 to be welded into the welding hole on the circuit board 3 conveniently. The bonding mode has low assembly cost, does not need to arrange extra hardware, and can effectively reduce the manufacturing cost.

Alternatively, 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 component 4 to be soldered into the solder hole on the circuit board 3, the aperture of the guide through hole 12 near the circuit board 3 may be smaller than the aperture of the guide through hole far from the circuit board 3. That is, as shown in fig. 4, a through hole similar to a trumpet shape is formed, and for the convenience of description, the aperture of the side of the guide through hole 12 close to the circuit board 3 is referred to as an inner aperture, and the aperture thereof far from the circuit board 3 is referred to as an outer aperture. After the tip of waiting to weld components and parts 4 pin 41 deviates from the certain distance of welding hole (this distance should be less than the outer aperture) because of the tolerance, because the pin 41 of waiting to weld components and parts 4 is flexible material, so it can stretch into guide through-hole 12 through the one end in outer aperture at first to carry out the butt with the inner wall of guide through-hole 12, because the setting of tubaeform through-hole, thereby pin 41 can take place to warp and stretch out one side in inner aperture under the guide of the inner wall of guide through-hole 12, finally get into in the welding hole that corresponds with the inner aperture side opening. It should be noted that, as shown in fig. 4, the diameter of the welding hole near the guiding through hole 12 is larger than or equal to the diameter of the opening at the inner diameter side of the guiding through hole 12, so that the pin 41 can easily extend into the welding hole. The size of the inner hole diameter of the guiding through hole 12 should be larger than the diameter of the pin 41 of the component 4 to be welded.

Alternatively, 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, when the end of the lead 41 abuts against the tapered inner wall of the guide through hole 12, the contact stress between the end of the lead and the tapered inner wall can be effectively reduced, the impact on the lead 41 is smaller than that of an arc inner wall, and the lead 41 can absorb the assembly tolerance more smoothly.

In addition, as shown in fig. 2, a small section of cylindrical hole can be further arranged at the small-bore end of the tapered hole, so that the strength of the guide through hole 12 at the position is improved, and the service life of the tool in the application is prolonged.

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 abutting against the circuit board 3 after the locking portion 13 is locked with the circuit board 3.

For example, in order to avoid excessive interference of the base on the circuit board 3, an isolation boss 14 may be further disposed 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 base body 11 and the circuit board 3 may be isolated from each other by the isolation boss 14, so as to avoid unnecessary damage to the structure on the circuit board 3 due to the large-area attachment of the base body 11 to the circuit board 3. The isolation bosses 14 may be provided in plural, and may be uniformly distributed on the base body 11, or randomly provided on the base body 11, and the heights (the direction from the base to the circuit board 3) may be uniform or non-uniform, and the specific settings may be selected reasonably according to actual requirements.

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

As an example, as shown in fig. 6, the isolation boss 14 may also be directly provided between the base body 11 and the locking portion 13, that is, the isolation boss 14 is provided on the base in sequence, and the locking portion 13 is provided on the isolation boss 14. After locking, the isolation boss 14 is located just between the circuit board 3 and the base body 11, and it should be noted that, as shown in fig. 6, the diameter of the isolation boss 14 is larger than that of the lock hole.

Optionally, the base is an insulating material.

For example, in order to avoid interference on the circuit board 3, the components, and the like, the base may be made of an insulating material, so that the circuit board 3 and the like are protected from insulation, and the phenomena of electric leakage and short circuit of the circuit board 3 caused by the base being made of a conductive material are avoided. Which may be a plastic such as polyvinyl chloride, polypropylene, etc. But also rubber and the like.

Optionally, the locking part 13 comprises a plurality of locking parts 13, and the locking parts 13 are arranged on the same side of the base at intervals; the lead through holes 12 include a plurality of lead through holes 12, and the plurality of lead through holes 12 correspond one-to-one to the plurality of soldering holes on the circuit board 3.

For example, as shown in fig. 2, the locking portions 13 may be multiple, for example, two, three, four, etc., and when they are arranged, they may be arranged at certain intervals (the intervals between different locking portions 13 may be different, and may be specifically arranged reasonably according to actual production requirements). In order to form a more stable locking, it is also possible to arrange a plurality of locking portions 13 on the same side of the base. Similarly, the guiding through holes 12 may be plural, and when the base and the circuit board 3 are locked, the guiding through holes are in one-to-one correspondence with the plural soldering holes on the circuit board 3, so that the pins 41 of the subsequent components 4 to be soldered can be smoothly inserted into the soldering holes.

As shown in fig. 3, when the tool of the present application is used, a lock hole having an appropriate size may be formed at a position of the circuit board 3 corresponding to the plurality of guide through holes 12 and the plurality of lock portions 13. And then the locking parts 13 are inserted into the corresponding locking holes of the circuit board 3 for locking. If the component 4 to be welded has a heat dissipation requirement, the component 4 to be welded is fixed at a proper position of the heat sink 6, the tool mounted on the circuit board 3 faces the component 4 to be welded, the circuit board 3 is fixed at a position corresponding to the heat sink 6 under the action of other auxiliary guides, in the process, the pin 41 of the component 4 to be welded automatically slides into a welding hole corresponding to the circuit board 3 along the guide through hole 12, the assembly is completed after the circuit board 3 is locked, and the subsequent welding can be started.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in 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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