Bus bar for surface mounting of PCB (Printed Circuit Board)

Abstract

The utility model belongs to the technical field of PCBs (printed circuit boards), and discloses a bus bar for mounting a PCB, the bus bar is mounted on the PCB, the bus bar comprises a board body, a positioning mounting block is mounted on the board body, the positioning mounting block is used for being connected with the PCB, the board body is provided with mounting screw holes, and the mounting screw holes are connected with the PCB. The board body is provided with mounting screw holes, the mounting screw holes are used for fixedly connecting the PCB and the bus bar through screws, the board body is provided with device holes, the device holes comprise a circular hole and a conical hole, the size of the conical hole is larger than that of the circular hole, the PCB comprises a device surface and a welding surface, the welding surface is provided with a bonding pad, and the board body is mounted corresponding to the position of the bonding pad. Welding holes are formed in the positions, corresponding to the positioning installation blocks, of the PCB and the bonding pad. The beneficial effects of the utility model are that: solve electronic system high density layout power line connection difficult problem, the appearance is flexible, gives consideration to heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of PCB board technology, and in particular to a busbar for PCB board mounting. Background Technology

[0002] In the electronics industry, busbars are commonly mounted on PCBs to serve the dual purpose of carrying high current and conducting heat, especially in high-power circuit boards. Traditional manufacturing processes for PCBs with busbars involve solder paste and reflow soldering. However, for some designs where space constraints necessitate mounting the busbars directly on the PCB soldering surface, electrical performance requires a close fit between the busbar and the component leads for optimal efficiency (ensuring no change in the cross-sectional area of ​​the power lines and maximizing output efficiency). This process necessitates maintaining a certain distance between the busbar and the component leads for effective soldering. If this distance reduces the cross-sectional area of ​​the power line connection, the current flow relies solely on the interlayer copper foil, leading to excessive heat generation, lower output efficiency, and potentially even burn-through. This presents a challenge where electrical performance and manufacturing efficiency cannot be reconciled. While post-soldering of the component leads can address this issue to prioritize electrical performance, the rapid heat dissipation of the busbar at the leads results in suboptimal soldering and increases labor costs, hindering mass production.

[0003] Therefore, it is necessary to provide a busbar for PCB board mounting to reduce design and manufacturing difficulty, shorten design and production cycles, and improve production efficiency. Utility Model Content

[0004] This utility model discloses a busbar for PCB circuit board mounting, relating to the power supply industry, which is used to connect PCB power circuits and can effectively solve the technical problems involved in the background art.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A busbar for PCB board mounting, the busbar is mounted on the PCB board, the busbar includes a board body, a positioning mounting block is mounted on the board body for connecting with the PCB board, and mounting screw holes are provided on the board body for fixing the PCB board and the busbar together with screws.

[0007] As a preferred improvement of this utility model, the plate body is provided with device holes.

[0008] As a preferred improvement of this utility model: the device hole includes a circular hole and a tapered hole, and the tapered hole is larger in size than the circular hole.

[0009] As a preferred improvement of this utility model: the PCB board includes a component side and a soldering side, the soldering side is provided with solder pads, and the board body is installed corresponding to the position of the solder pads.

[0010] As a preferred improvement of this utility model: the PCB board and the pads are provided with welding holes corresponding to the positions of the positioning mounting blocks, and the pads are welded to the positioning mounting blocks.

[0011] As a preferred improvement of this utility model, the welding hole is racetrack shaped.

[0012] As a preferred improvement of this utility model: the PCB board and the pad are provided with through holes corresponding to the mounting screw holes, and the screw passes through the through holes to be screwed into the mounting screw holes.

[0013] As a preferred improvement of this utility model, the number of the positioning mounting blocks is multiple.

[0014] As a preferred improvement of this utility model, the number of mounting screw holes is 2-4.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model busbar can be used on the bottom of the board and wave soldered together with the plug-in pins. The surface mount will not fall off, solving the defect that the plug-in pins and surface mount cannot be seamlessly connected in the traditional process. The seamless connection between the surface mount busbar and the plug-in pin can reduce connection loss, improve efficiency, solve the problem of power line connection in high-density layout of electronic systems, and has a flexible shape and heat dissipation.

[0017] 2. When surface mount busbars are used on the soldering side of a PCB, no fixture protection is required for wave soldering, making production convenient. This solves the problem of the inability to balance the electrical properties of the surface mount busbar with those of the through-hole pins and the manufacturing process when the surface mount busbar is designed on the soldering side of the PCB (to improve efficiency, the electrical properties require the surface mount busbar to be closely attached to the through-hole pins for soldering, and the process requires that the two must be kept at a certain distance for production). The PCB power circuit design can mainly use the busbar, reducing the number of PCB layers and lowering the manufacturing cost of the PCB. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0019] Figure 1This is a schematic diagram illustrating the use of a busbar for PCB board mounting according to the present invention.

[0020] Figure 2 This is a schematic diagram of the busbar structure of this utility model. Figure 1 ;

[0021] Figure 3 This is a schematic diagram of the busbar structure of this utility model. Figure 2 ;

[0022] Figure 4 This is a schematic diagram of Example 1;

[0023] Figure 5 This is a schematic diagram showing the dimensions of Example 1;

[0024] Figure 6 This is a schematic diagram of the device installation.

[0025] In the diagram: 1-PCB board, 2-pad, 3-busbar, 301-board body, 302-positioning mounting block, 303-mounting screw hole, 304-circular hole, 305-tapered hole, 4-screw. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0031] In surface mount busbar design, PCB board design is limited by manufacturing capabilities. When wave soldering surface mount buses on the PCB soldering side, fixtures are needed to prevent component loss after wave soldering, increasing fixture costs. The cross-sectional area of ​​the power line connections becomes smaller, and the current in these areas can only be connected by the copper foil between PCB layers, leading to increased heat generation and potentially burn-through, thus failing to meet electrical requirements. Forcing a close design between the surface mount busbar and the through-hole pins can solve this problem through post-soldering, but the rapid heat dissipation at the pins results in poor soldering, causing product quality issues and increasing labor costs, which is detrimental to mass production.

[0032] Please see Figures 1-3As shown, this utility model provides a busbar for PCB circuit board mounting. The busbar 3 is mounted on a PCB board 1. The busbar 3 includes a board body 301, on which a positioning mounting block 302 (integrated with the board body, equivalent to a bent leg of the board body) is mounted. The positioning mounting block 302 is used to connect with the PCB board 1. The board body 301 is provided with mounting screw holes 303, which are used to fix the PCB board 1 and the busbar 3 together with screws 4. The PCB board 1 includes a component surface (top surface in the figure) and a soldering surface (bottom surface in the figure). The soldering surface is provided with solder pads 2, and the board body 301 is mounted at the position corresponding to the position of the solder pads 2. The PCB board 1 and the solder pads 2 are provided with soldering holes at the positions corresponding to the positions of the positioning mounting block 302. The solder pads 2 are soldered to the positioning mounting block 302, and the soldering holes are racetrack-shaped. The PCB board 1 and the pads 2 are provided with through holes corresponding to the mounting screw holes 303. The screws 4 pass through the through holes and are screwed into the mounting screw holes 303. The flexible design of the mounting busbar solves the problem of PCB board design limitations due to manufacturing process constraints, reduces design and production difficulty, shortens design and production cycles, and improves production efficiency.

[0033] In this embodiment, the board 301 is provided with component holes, including four circular holes 304 (cylindrical through holes) and four tapered holes 305 (salad holes) in the figure. These are used for avoiding and soldering the plug-in pins. The plug-in pins are inserted into the circular holes 304 in the same network as the busbar, and into the tapered holes 305 in a different network. The tapered holes 305 are larger than the circular holes 304. The diameter of the cylindrical through holes is e = Φ2.5mm (or other values), and the diameter of the salad holes is f = Φ7*Φ5mm (or other values). The small circular holes corresponding to the plug-in pins pass through the wave soldering oven and are directly soldered to the reflow soldering bar, which is in the same circuit network. The large tapered holes are through which the plug-in passes, but are not soldered to the busbar; they are soldered onto the PCB board, and the busbar needs to be cut out to avoid them. Preferably, the number of positioning mounting blocks 302 is multiple, 2-3, and the number of mounting screw holes 303 is 1-3. This utility model busbar requires solder paste application and mounting, and is fixed by screws passing through the PCB board from the PCB insertion side. Subsequently, the busbar is soldered to the insertion pins in a reflow oven. The slots in the busbar can avoid short circuits on different networks caused by soldering.

[0034] Please see Figures 4-5 As shown in the figure, another embodiment of this utility model is presented.

[0035] A novel surface mount bus design is proposed to address the challenge of balancing the design of surface mount buses with the process and electrical requirements of through-hole components when soldering on the PCB. The design adds bent feet (positioning mounting blocks) and through-hole screw holes to the surface mount bus. Compared to conventional straight-line surface mount bus designs, the added bent feet can be in any position, number, and size, with a length typically not exceeding the PCB thickness, generally between 1-2 mm, to secure the bus and prevent misalignment. The added threaded through-hole screws can be located anywhere on the bus, typically 1-2 holes, and can be of any size, generally using M2, M2.5, or M3 screws. This design is convenient and can be automated for placement using tape and reel placement machines. Compared to conventional surface mount buses, this design eliminates the need for additional fixtures during wave soldering, offering production flexibility and effectively meeting electrical connection requirements. Since the bent foot length does not exceed the board thickness, it does not interfere with the placement and installation of through-hole components and does not occupy PCB space. The number and corresponding positions of the circular holes 304 and the tapered holes 305 can be set according to your needs. (Refer to the following:) Figure 1 Chinese solution.

[0036] In one implementation, the busbar bend size is (length * width) = a * b, and the bend length c = 1.5mm (or other values, not exceeding the PCB thickness). In this embodiment, the busbar screw through-hole d is an M2 screw hole (or other values, such as M2.5 / M3, etc.). The busbar bend and screw holes need to be added to the PCB design at corresponding positions with racetrack-shaped solder holes and screw through-holes for busbar mounting and fixing. The relationship between the PCB racetrack-shaped drill hole diameter and the bend pin size is as follows: L = a + 0.5mm (or other values), H = b + 0.3mm (or other values), where the width of the solder pad ring is 1.5 times the drill hole size in the corresponding direction (or other values). The PCB drill hole diameter requirement corresponding to the screw holes on the busbar is as follows: D = M2 (or other values) + 0.3mm (or other values). In use, the bent feet are inserted into the racetrack-shaped solder holes on the PCB board, and the screw holes of the busbar correspond to the through holes on the PCB board. Screws are tightened downwards from above the through holes to secure the busbar, followed by soldering. This flexible design of the busbar mounting system solves the problem of PCB board design limitations due to manufacturing process constraints, reducing design and production difficulty, shortening design and production cycles, improving production efficiency, and lowering product costs. It should be further noted that any other components used to achieve the above effects should fall within the inventive concept of this utility model and should be protected within its scope.

[0037] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A busbar for mounting on a PCB circuit board, wherein the busbar (3) is mounted on a PCB board (1), characterized in that: The busbar (3) includes a board body (301), on which a positioning mounting block (302) is installed. The positioning mounting block (302) is used to connect with the PCB board (1). The board body (301) is provided with mounting screw holes (303), which are used to fix the PCB board (1) and the busbar (3) together with screws (4).

2. The busbar for PCB circuit board mounting according to claim 1, characterized in that: The plate (301) is provided with device holes.

3. A busbar for PCB board mounting according to claim 2, characterized in that: The device hole includes a circular hole (304) and a tapered hole (305), wherein the tapered hole (305) is larger in size than the circular hole (304).

4. A busbar for PCB board mounting according to claim 1, characterized in that: The PCB board (1) includes a component side and a soldering side. The soldering side is provided with solder pads (2). The board body (301) is installed at the position corresponding to the solder pads (2).

5. A busbar for PCB board mounting according to claim 4, characterized in that: The PCB board (1) and the pads (2) are provided with welding holes corresponding to the positions of the positioning mounting block (302), and the pads (2) are welded to the positioning mounting block (302).

6. A busbar for PCB board mounting according to claim 5, characterized in that: The welding hole is racetrack shaped.

7. A busbar for PCB board mounting according to claim 4, characterized in that: The PCB board (1) and the pad (2) are provided with through holes corresponding to the mounting screw holes (303), and the screw (4) passes through the through holes and is screwed into the mounting screw holes (303).

8. A busbar for PCB board mounting according to claim 1, characterized in that: The number of the positioning mounting blocks (302) is multiple.

9. A busbar for PCB board mounting according to claim 1, characterized in that: The number of mounting screw holes (303) is 2-4.

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