Solder connection columns for circuit boards

Abstract

The utility model discloses a welding connection column for a circuit board, and relates to the field of welding technology, wherein the welding connection column for a circuit board comprises a connection pipe, the connection pipe comprises a pipe body and a welding structure; the pipe body has two end face portions along its axial direction, the welding structure is arranged on at least one of the two end face portions, and the welding structure comprises two parallelly arranged welding portions. In the technical solution provided by the utility model, by adopting the connection pipe processing, by cutting on the end face of the connection pipe, two welding feet are obtained by only one machining process, so that the contact area with the pad is large and the welding is reliable, and after being inserted into the circuit board and wave soldering, the connection pipe is not easy to rotate when subjected to axial force, so as to prevent the connection pipe from rotating under the action of axial force and causing the connection pipe to fail, thereby improving the processing efficiency; by selecting a copper pipe for the connection pipe, no drilling is required before tapping, so as to reduce the machining process and save the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of welding, in particular to a welding connection column for a circuit board. Background Art

[0002] Currently, the connecting columns used for circuit board welding are mostly used for overcurrent, and include at least two flat end faces, one end of which is welded on the circuit board, and the other end is used to connect to equipotential bodies, such as terminal blocks, another circuit board with copper skin, etc.; most of their designs are cut using solder, and the bottom of the connecting column used for welding on the circuit board is generally cut into a single-leg cross-section plug-in and passed through wave soldering with the circuit board, or the special-shaped step surface is surface-mounted on the circuit board, or the step surface has holes and is fixed to the circuit board by screws before wave soldering.

[0003] However, there are still some defects in the above design. For example, cutting into a single-leg section results in a small contact area with the pad, which is easy to rotate when subjected to axial force, resulting in poor welding effect. This also increases the machining process and increases costs.

[0004] In view of this, we propose a soldering connection column for a circuit board to solve the above problems. Utility Model Content

[0005] The main purpose of the utility model is to provide a welding connection column for a circuit board, aiming to realize rotation that is not easily affected by axial force during welding, improve welding stability, thereby reducing machining procedures and reducing costs.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a welding connection column for a circuit board, comprising a connection tube, wherein the connection tube comprises:

[0007] a pipe body having two end surface portions along an axial direction thereof; and

[0008] The welding structure is arranged on at least one of the two end surface portions, and the welding structure comprises two welding portions arranged in parallel, and the two welding portions are both used for abutting and welding with the circuit board.

[0009] In one embodiment, end surfaces of the two welding portions are configured to be planes.

[0010] In one embodiment, the two welding portions include a first welding foot and a second welding foot;

[0011] The first welding leg and the second welding leg are arranged on both sides of the central axis direction of the connecting pipe.

[0012] In one embodiment, a groove is formed at one end of the connecting pipe, and the groove laterally penetrates the connecting pipe.

[0013] The bottom wall surface of the groove includes an end surface of one of the end surface portions;

[0014] The two welding portions are located on both sides of the groove.

[0015] In one embodiment, the inner cavity of the tube body is provided with an internal thread.

[0016] In one embodiment, the connecting pipe is integrally formed.

[0017] In one embodiment, the connecting pipe is made of copper.

[0018] In one embodiment, the two end face portions include a first end face portion provided with the welding structure and a second end face portion opposite to the first end face portion, and the opening of the tube body provided on the second end face portion is chamfered.

[0019] In one embodiment, an outer side surface of the welding portion is matched with an outer side surface of the pipe body.

[0020] The utility model also provides a circuit board, comprising a circuit board and a welding connection column welded to the circuit board;

[0021] The soldering connection column includes the soldering connection column for the circuit board.

[0022] The technical solution of the utility model adopts the connection tube processing, and through the incision on the end surface of the connection tube, two solder feet can be obtained by only one machining process, so as to achieve the effect of large contact area with the soldering pad and reliable welding. After being inserted into the circuit board and subjected to wave soldering, the connection tube is not easy to rotate when subjected to axial force, so as to prevent the connection tube from rotating under the action of axial force and causing failure, thereby improving the processing efficiency. Through the setting of the connection tube, there is no need to drill holes before tapping, so the machining process is reduced and the cost is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of the three-dimensional structure of a welding connection column for a circuit board provided by the utility model;

[0025] Figure 2 for Figure 1 Schematic diagram of the bottom three-dimensional structure.

[0026] Description of Figure Numbers:

[0027] 100. Connecting pipe; 1. Pipe body; 11. End face portion; 111. First end face portion; 112. Second end face portion; 2. Welding structure; 21. Welding portion; 211. First welding leg; 212. Second welding leg; 3. Groove.

[0028] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0032] Currently, the connecting columns used for circuit board welding are mostly used for overcurrent, and include at least two flat end faces, one end of which is welded on the circuit board, and the other end is used to connect to equipotential bodies, such as terminal blocks, another circuit board with copper skin, etc.; most of their designs are cut using solder, and the bottom of the connecting column used for welding on the circuit board is generally cut into a single-leg cross-section plug-in and passed through wave soldering with the circuit board, or the special-shaped step surface is surface-mounted on the circuit board, or the step surface has holes and is fixed to the circuit board by screws before wave soldering.

[0033] However, there are still some defects in the above design. For example, cutting into a single-leg section results in a small contact area with the pad, which is easy to rotate when subjected to axial force, resulting in poor welding effect. This also increases the machining process and increases costs.

[0034] The utility model provides a welding connection column for a circuit board.

[0035] See also Figure 1 and Figure 2 In one embodiment of the utility model, the circuit board is provided with a welding connection column, comprising a connecting tube 100, wherein the connecting tube 100 comprises a tube body 1 and a welding structure 2, wherein the tube body 1 has two end face portions 11 along its axial direction; the welding structure 2 is arranged on at least one of the two end face portions 11, and the welding structure 2 comprises two parallelly arranged welding portions 21, and both of the two welding portions 21 are used for abutting welding with the circuit board. It can be understood that in some embodiments, a column structure is used for processing, and is generally cut into a single-leg cross-section plug-in for wave soldering with the circuit board. The single-leg cross-section obtained by such a cutting method has the problem of small contact area with the pad, resulting in unstable welding, affecting the subsequent processing efficiency, and the column structure cannot be directly tapped during processing and requires drilling, which adds machining steps and increases costs. Therefore, this embodiment can directly perform tapping without drilling through the setting of the connecting tube 100, thereby reducing the processing steps and saving costs; through the setting of the welding structure 2, two parallel-set welding parts 21 are used to increase the contact area with the pad, so that the welding of the welding part 21 is reliable. When inserted into the circuit board and subjected to wave soldering, the connecting tube 100 is not easy to rotate when subjected to axial force, thereby ensuring stable welding and improving welding efficiency.

[0036] Furthermore, the end faces of the two welding parts 21 are set as planes. It can be understood that in some embodiments, the welding end faces are set as anisotropic step faces, which increases the processing steps and leads to excessively high overall costs, complicating the assembly to a certain extent. In this embodiment, by setting the end faces as flat end faces, there is no need to increase the processing steps, which reduces the total cost and simplifies the assembly.

[0037] In addition, the two welding parts 21 include a first welding leg 211 and a second welding leg 212; the first welding leg 211 and the second welding leg 212 are arranged on both sides of the central axis direction of the connecting tube 100. It can be understood that in some embodiments, the welding leg is set as a single one, and the single welding leg is set with a small area when contacting with the welding pad for welding, which is not conducive to the stability during welding. Therefore, in this embodiment, the two parallel welding parts 21, that is, the first welding leg 211 and the second welding leg 212 are set, compared with a single welding leg, the contact area with the welding pad is increased, thereby improving the stability of welding between the connecting tube 100 and the circuit board and improving the welding efficiency.

[0038] Furthermore, a groove 3 is provided at one end of the connecting tube 100, and the groove 3 is laterally penetrated by the connecting tube 100; the bottom wall of the groove 3 includes the end face of one of the end face portions 11; and the two welding portions 21 are located on both sides of the groove 3. It is clear that in some embodiments, a welding foot is formed by two cuts, which not only reduces the contact area with the welding pad, but also increases the machining process. Therefore, this embodiment adopts the setting that the groove laterally penetrates the connecting tube 100, and the bottom wall of the groove 3 includes the end face of one of the end face portions 11, so that the groove 3 and the connecting tube 100 are integrally set, that is, the processing of the groove 3 is directly realized by the incision, and two welding feet can be directly obtained, which not only reduces the processing process, but also saves the total cost.

[0039] In addition, the inner cavity of the tube body 1 is provided with internal threads. It is understandable that in some embodiments, the column structure needs to be drilled first and then tapped, which complicates the machining process. Therefore, in this embodiment, the tubular setting of the connecting tube 100 is directly adopted, so that it has a hole itself, and the internal thread is directly tapped. Compared with the need to drill first and then tap, the machining process of this embodiment is reduced, which reduces the production cost.

[0040] In addition, the connecting pipe 100 is integrally formed. It is understandable that in some embodiments, the purpose of welding stability is achieved by adding an external structure, which invisibly increases the processing cost and process. In this embodiment, two welding feet are obtained by direct incision to achieve welding stability, which not only reduces the machining process but also saves resources.

[0041] In addition, the material of the connecting tube 100 includes copper. It is understandable that in addition to copper tube processing, other materials that can be welded with the circuit board in the welding field can also be used in this embodiment. Compared with the traditional connecting tube 100 made of copper material, this embodiment has more choices.

[0042] It should be added that, in this embodiment, the connecting pipe 100 is preferably made of a copper pipe.

[0043] In addition, the two end face portions 11 include a first end face portion 111 provided with the welding structure 2 and a second end face portion 112 opposite to the first end face portion 111, and the opening of the pipe body 1 provided on the second end face portion 112 is provided with a chamfer. It can be obtained that, in some embodiments, direct cutting processing is performed without chamfering the cut, so that in this embodiment, when performing welding operation, the chamfer is provided so that it plays a guiding role when the pipe body 1 is fastened by screws or there is no burr when the pipe body 1 contacts the welding surface to avoid uneven welding.

[0044] It should be explained that the connecting pipe 100 is welded to the welding pad by the welding portion 21 being located on the second end surface portion 111, while the first end surface portion 112 is connected to an equipotential body through the internal thread provided in the inner cavity of the pipe body 1 for overcurrent operation.

[0045] In addition, the outer side surface of the welding portion 21 is matched with the outer side surface of the pipe body 1. It can be understood that in some embodiments, the method of achieving welding stability through an additional structure not only increases the cost, but also the processing steps. Therefore, this embodiment simplifies the material selection, and the outer side surface of the welding portion 21 is matched with the outer side surface of the pipe body 1, so that the welding portion 21 and the pipe body 1 can be integrally formed, and the purpose of welding stability can be achieved without an additional structure.

[0046] It should be added that, in this embodiment, the setting of the tube body 1 is not limited to a circular tube (the inside and outside of the tube cross-section are both circular), but can also be other tubes, such as: a tube with a square outside and a circular inside cross-section; changes in the cross-sectional shape of the tube are also included in the present application, and can be implemented according to the processing plan in the present application.

[0047] The utility model also proposes a circuit board, which includes a circuit board and a welding connection column welded to the circuit board, the welding connection column includes the welding connection column for the circuit board, and the specific structure of the circuit board refers to the above embodiment. Since the circuit board adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0048] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A soldering connection column for a circuit board, characterized in that: The invention comprises a connecting pipe, wherein the connecting pipe comprises: a pipe body having two end surface portions along an axial direction thereof; and The welding structure is arranged on at least one of the two end surface portions, and the welding structure comprises two welding portions arranged in parallel, and the two welding portions are both used for abutting and welding with the circuit board.

2. The solder connection column for a circuit board according to claim 1, characterized in that: The end surfaces of the two welding portions are arranged to be planes.

3. The solder connection column for a circuit board according to claim 1, characterized in that: The two welding parts include a first welding foot and a second welding foot; The first welding leg and the second welding leg are arranged on both sides of the central axis direction of the connecting pipe.

4. The solder connection column for a circuit board as claimed in claim 3, characterized in that: A groove is formed at one end of the connecting pipe, and the groove laterally penetrates the connecting pipe; The bottom wall surface of the groove includes an end surface of one of the end surface portions; The two welding portions are located on both sides of the groove.

5. The solder connection column for a circuit board as claimed in claim 1, characterized in that: The inner cavity of the tube body is provided with internal threads.

6. The solder connection column for a circuit board as claimed in claim 1, characterized in that: The connecting pipe is integrally formed.

7. The solder connection column for a circuit board as claimed in claim 1, characterized in that: The connecting pipe is made of copper.

8. The solder connection column for a circuit board as claimed in claim 1, characterized in that: The two end face portions include a first end face portion provided with the welding structure and a second end face portion opposite to the first end face portion, and a chamfer is provided at an opening of the pipe body provided on the second end face portion.

9. The solder connection column for a circuit board as claimed in claim 1, characterized in that: The outer side surface of the welding portion is matched with the outer side surface of the pipe body.

10. A circuit board, characterized in that: It comprises a circuit board and a soldering connection column connected to the circuit board by soldering, wherein the soldering connection column comprises the soldering connection column for a circuit board as claimed in any one of claims 1 to 9.

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