Fixing structure applied to PCB welding

Abstract

The utility model discloses a fixing structure applied to PCB welding, which enables a welding connection position to be stable and reliable, has good anti-falling strength and ensures long-term stable and reliable use of a PCB assembly. The PCB comprises a first PCB and a second PCB, and is characterized in that the first PCB is perpendicular to the second PCB, a welding notch groove is formed in the first PCB, a protruding block is arranged at the position, corresponding to the welding notch groove, of the second PCB, an external expansion flow channel groove is formed in the center area of the long edge of the welding notch groove, and the protruding block is arranged in the external expansion flow channel groove. After the protruding block is inserted into the welding notch groove, the externally-expanded flow channel groove is exposed. A plurality of first positioning holes are formed in the peripheries, corresponding to the long edges of the two sides of the welding notch groove, of the first PCB, and a plurality of second positioning through holes are formed in the areas, corresponding to the protruding blocks and close to the body, of the second PCB; and after welding is completed, welding seams on the two sides of the second PCB respectively cover the first positioning hole, the second positioning through hole and the external expansion runner groove.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB welding, in particular to a fixing structure applied to PCB welding. Background Art

[0002] In the electronics manufacturing industry, welding assembly is a commonly used method for connecting and fixing PCBs. In the existing technology, when two PCB boards are welded perpendicular to each other, the welding method is as follows: Figure 1 and Figure 2 A positioning notch is set on one PCB board, and a raised block is set on the other PCB board. The raised block is arranged in the shape of the positioning notch. The raised block is inserted into the corresponding positioning notch, and then soldering is performed on the connection surface of the two PCB boards. After welding, a Figure 2 The welding effect of this welding structure, in actual use, the firmness of this welding structure is not high, its anti-fall strength is insufficient, and it is easy to loosen in the later stage. Therefore, it is urgent to develop a stable and reliable welding fixing structure after welding. Summary of the invention

[0003] In view of the above problems, the utility model provides a fixing structure applied to PCB welding, which makes the welding connection position stable and reliable, has good drop resistance, and ensures the long-term stable and reliable use of the PCB board assembly.

[0004] A fixing structure used for PCB welding, the technical solution of which is as follows, comprises a first PCB board and a second PCB board, and is characterized in that:

[0005] The first PCB board is arranged perpendicular to the second PCB board, a welding notch groove is arranged on the first PCB board, a bump is arranged at a position corresponding to the welding notch groove on the second PCB board, an outward expansion flow channel groove is arranged at the center area of ​​the long side of the welding notch groove, and the bump is inserted into the welding notch groove, and the outward expansion flow channel groove is exposed;

[0006] The first PCB board is provided with a plurality of first positioning holes on the periphery of the long sides on both sides corresponding to the welding notch groove, and the second PCB board is provided with a plurality of second positioning through holes on the area close to the main body corresponding to the protrusion. After welding, the welds on both sides of the second PCB board respectively cover the first positioning holes, the second positioning through holes and the outward-expanding flow channel groove.

[0007] It is further characterized by:

[0008] The solder after welding fills the first positioning hole, the second positioning through hole and the outward expansion flow channel groove;

[0009] The first positioning holes are arranged in an unevenly scattered manner, and the second positioning through holes are arranged in an unevenly scattered manner;

[0010] The first positioning holes are arranged in a uniform array, and the second positioning through holes are arranged in a uniform array;

[0011] The first positioning hole is a through hole or a blind hole;

[0012] Two groups of bumps and second positioning through holes are provided on one side of the second PCB board, which are used for alignment and assembly with the corresponding two groups of welding notch grooves and first positioning holes on the first PCB board.

[0013] After adopting the utility model, by setting the outward expansion channel groove in the center area of ​​the long side of the welding notch groove and adding the first positioning hole and the second positioning through hole, the tin material creeping property of the welding process is utilized to make the tin creeping to the Figure 4 The welding schematic diagram shown makes the welding connection position stable and reliable, and has good drop resistance, ensuring the long-term stable and reliable use of the PCB board assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of welding assembly docking in the prior art;

[0015] Figure 2 A cross-sectional view of a weld connection in the prior art;

[0016] Figure 3 This is a schematic diagram of the welding assembly docking of the utility model;

[0017] Figure 4 It is a cross-sectional view of the welding connection of the utility model;

[0018] Figure 5 It is a top view of welding of a specific embodiment of the utility model;

[0019] Figure 6 It is a bottom-view stereoscopic view of welding of a specific embodiment of the utility model;

[0020] The names corresponding to the serial numbers in the figure are as follows:

[0021] A first PCB board 10, a welding notch groove 11, an outward expansion channel groove 12, a first positioning hole 13, a second PCB board 20, a bump 21, a second positioning through hole 22, and a welding seam 30;

[0022] Upper PCB board 1, lower PCB board 2, vertical PCB board 3. DETAILED DESCRIPTION

[0023] A fixing structure used for PCB welding, see Figure 3-Figure 4, which comprises a first PCB board 10 and a second PCB board 20, wherein the first PCB board 10 is arranged perpendicular to the second PCB board 20, the first PCB board 10 is a flat plate, and a welding notch groove 11 is arranged on its surface, and the second PCB board 20 is a vertical plate, and a convex block 21 is arranged at a position corresponding to the welding notch groove 11, and an outward expansion flow channel groove 12 is arranged at the center area of ​​the long side of the welding notch groove 11, and after the convex block 21 is inserted into the welding notch groove 11, the outward expansion flow channel groove 12 is exposed;

[0024] The first PCB board 10 is provided with a plurality of first positioning holes 13 on the periphery of the long sides on both sides corresponding to the welding notch groove 11, and the second PCB board 20 is provided with a plurality of second positioning through holes 22 on the upper area corresponding to the protrusion 21. After welding, the welds 30 on both sides of the second PCB board 20 respectively cover the first positioning holes 13, the second positioning through holes 22 and the outward expansion channel groove 12.

[0025] The solder after welding fills the first positioning hole 13, the second positioning through hole 22 and the outward expansion flow channel groove 12;

[0026] In a specific implementation, the first positioning holes 13 are unevenly scattered and arranged, and the second positioning through holes 22 are unevenly scattered and arranged;

[0027] Or the first positioning holes 13 are arranged in a uniform array, and the second positioning through holes 22 are arranged in a uniform array.

[0028] Specific embodiments, see Figure 5 and Figure 6 The invention comprises four PCB boards, namely an upper PCB board 1, a lower PCB board 2 and two groups of vertical PCB boards 3 in a cross combination. The two groups of vertical PCB boards 3 are respectively provided with corresponding protrusions 21 which are convex downward and convex upward at both ends of the length direction of the bottom and top sides. Each protrusion 21 is respectively provided with a plurality of second through positioning holes 22 which are arranged in a hashed manner in the area close to the body. The upper PCB board 1 and the lower PCB board 2 are respectively provided with corresponding welding notch grooves 11 at the positions corresponding to the protrusions 21. The central area of ​​the long side of the welding notch groove 11 is provided with a plurality of second through positioning holes 22 which are arranged in a hashed manner. An outward expansion flow channel groove 12 is arranged, and after the convex block 21 at the corresponding position is inserted into the welding notch groove 11, the outward expansion flow channel groove 12 is exposed, and the upper PCB board 1 and the lower PCB board 2 are respectively provided with a plurality of first positioning holes 13 on the periphery of the long sides of the two sides corresponding to the welding notch groove 11. After welding, the welds 30 on both sides of the vertical PCB board 3 respectively cover the first positioning holes 13, the second positioning through holes 22 and the outward expansion flow channel groove 12 in the corresponding areas, and the solder after welding fills the first positioning holes 13, the second positioning through holes 22 and the outward expansion flow channel groove 12. The first positioning hole 13 of the upper PCB board 1 is a blind hole structure with the top blocked to ensure the appearance.

[0029] The working principle is as follows: by setting an outward expansion channel groove in the center area of ​​the long side of the welding notch groove and adding a first positioning hole and a second positioning through hole, the tin material creeping property of the welding process is utilized to make the tin creep to the Figure 4 The welding schematic diagram shown makes the welding connection position stable and reliable, and has good drop resistance, ensuring the long-term stable and reliable use of the PCB board assembly.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0031] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fixing structure for PCB welding, comprising a first PCB board and a second PCB board, characterized in that: The first PCB board is arranged perpendicular to the second PCB board, a welding notch groove is arranged on the first PCB board, a bump is arranged at a position corresponding to the welding notch groove on the second PCB board, an outward expansion flow channel groove is arranged at the center area of ​​the long side of the welding notch groove, and the bump is inserted into the welding notch groove, and the outward expansion flow channel groove is exposed; The first PCB board is provided with a plurality of first positioning holes on the periphery of the long sides on both sides corresponding to the welding notch groove, and the second PCB board is provided with a plurality of second positioning through holes on the area close to the main body corresponding to the protrusion. After welding, the welds on both sides of the second PCB board respectively cover the first positioning holes, the second positioning through holes and the outward-expanding flow channel groove.

2. The fixing structure for PCB welding according to claim 1, characterized in that: The solder after welding fills up the first positioning hole, the second positioning through hole and the outward expansion flow channel groove.

3. The fixing structure for PCB welding according to claim 1, characterized in that: The first positioning holes are unevenly scattered and arranged, and the second positioning through holes are unevenly scattered and arranged.

4. The fixing structure for PCB welding according to claim 1, characterized in that: The first positioning holes are arranged in a uniform array, and the second positioning through holes are arranged in a uniform array.

5. The fixing structure for PCB welding according to claim 1, characterized in that: The first positioning hole is a through hole or a blind hole.

6. A fixing structure for PCB welding according to any one of claims 1 to 5, characterized in that: Two groups of bumps and second positioning through holes are provided on one side of the second PCB board, and are used for alignment and assembly with the corresponding two groups of welding notch grooves and first positioning holes on the first PCB board.

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