CN209949518U - Grounding structure of printed circuit board and direct current converter - Google Patents
Grounding structure of printed circuit board and direct current converter Download PDFInfo
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- CN209949518U CN209949518U CN201821762497.0U CN201821762497U CN209949518U CN 209949518 U CN209949518 U CN 209949518U CN 201821762497 U CN201821762497 U CN 201821762497U CN 209949518 U CN209949518 U CN 209949518U
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Abstract
The embodiment of the utility model provides a printed circuit board's ground structure and direct current converter, printed circuit board's ground structure includes printed circuit board, fastener and leads electrical pillar, wherein: the printed circuit board is provided with a through hole, the outer diameter of the conductive column is matched with the diameter of the through hole, the conductive column penetrates through the through hole and is welded and fixed to the printed circuit board, and the conductive column is in conductive connection with a grounding end on the printed circuit board; the first end of the conductive column protrudes out of the back surface of the printed circuit board; the conductive post includes a securing hole that extends axially therethrough, and is secured to and conductively coupled with a ground member by a fastener that passes through the securing hole. The utility model discloses a lead electrical pillar and be connected printed circuit board's earthing terminal and ground connection component are electrically conductive, and not only ground connection is reliable, easily realizes automated production moreover.
Description
Technical Field
The embodiment of the utility model provides a ground structure is related to, more specifically says, relates to a printed circuit board's ground structure and direct current converter.
Background
At present, the ground terminal of a Printed Circuit Board (PCB) in a DC-DC converter (i.e. a DC converter) or other devices is generally grounded by a way of a copper bar (copper sheet) or a copper exposed part of a circuit board window to connect to a chassis.
However, in the above grounding method, the copper bar of the connector is generally soldered on the printed circuit board by wave soldering or reflow soldering, and then the copper bar is locked to the housing by screws. Although the grounding mode is reliable in grounding, the plug-in copper bar needs to be manually plugged into the printed circuit board, so that the automation degree is low; and because the plug-in copper bar needs to be electrified with large current, the plug-in copper bar needs to be large, and the material cost is higher.
In the scheme of windowing and copper exposing of the circuit board, copper is exposed by windowing the contact surface of the printed circuit board and the shell, and the printed circuit board is compressed by using a screw, so that the copper foil at the position where the window is exposed is contacted with the shell. However, because the printed circuit board is made of FR-4 organic material, the rigidity is insufficient, and the printed circuit board material can be softened and the screw is loosened in the long-term use process, so that the grounding contact resistance is increased.
Therefore, the existing grounding mode of the printed circuit board has low automation degree and high cost; or, in the long-term use process, the printed circuit board material can soften, the screw becomes loose, and the resistance of the grounding contact resistor is large.
Disclosure of Invention
The embodiment of the utility model provides a technical problem who solves lies in, low, with high costs to the degree of automation that above-mentioned printed circuit board ground structure exists to and use ground connection contact resistance for a long time and change big problem, provide a printed circuit board's ground structure and direct current converter.
The embodiment of the utility model provides a solve above-mentioned technical problem's technical scheme is, provide a printed circuit board's ground structure, include printed circuit board, fastener and lead electrical pillar, wherein: the printed circuit board is provided with a through hole, the outer diameter of the conductive column is matched with the diameter of the through hole, the conductive column penetrates through the through hole and is welded and fixed to the printed circuit board, and the conductive column is in conductive connection with a grounding end on the printed circuit board; the first end of the conductive column protrudes out of the back surface of the printed circuit board; the conductive post includes a securing hole that extends axially therethrough, and is secured to and conductively coupled with a ground member by a fastener that passes through the securing hole.
Preferably, the ground terminal is formed by a ground copper foil on the printed circuit board, the through hole penetrates through the ground copper foil, a copper plating layer is arranged on the inner wall of the through hole, and the copper plating layer is electrically connected with the ground copper foil in a conductive manner.
Preferably, an electronic component is soldered to a front surface of the printed circuit board, and the conductive column is fixed to the ground member with a rear surface of the printed circuit board facing the ground member.
Preferably, the portion of the first end of the conductive post protruding from the back surface of the printed circuit board has a radial flange, and the diameter of the outer periphery of the flange is larger than that of the through hole.
Preferably, the fastener is a screw, the fixing hole is an internal thread hole, and the screw is in threaded connection with the conductive post.
Preferably, the second end of the conductive post protrudes from the front surface of the printed circuit board.
Preferably, the height of the second end of the conductive column protruding from the front surface of the printed circuit board is 0.1-0.2 mm.
Preferably, the printed circuit board has a plurality of through holes, and each through hole is welded with one conductive column; each of the conductive posts is secured to the ground member by a fastener.
Preferably, the plurality of through holes are evenly distributed on the printed circuit board.
The embodiment of the utility model provides a still provide a direct current converter, including casing and as above printed circuit board's ground structure, the ground connection component does the casing.
The utility model discloses printed circuit board's ground structure and direct current converter have following beneficial effect: the grounding end of the printed circuit board is electrically connected with the grounding component through the conductive column, so that the grounding is reliable, and the automatic production is easy to realize.
Drawings
Fig. 1 is a schematic diagram of a grounding structure of a printed circuit board according to an embodiment of the present invention;
fig. 2 is a schematic view illustrating a printed circuit board and a conductive pillar fixed to each other in a grounding structure of the printed circuit board according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a conductive pillar in a grounding structure of a printed circuit board according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-3, which are schematic diagrams of the grounding structure of the printed circuit board according to the embodiment of the present invention, the grounding structure of the printed circuit board can be applied to applications such as a dc converter, and can realize large-current grounding of the grounding end of the printed circuit board. The grounding structure of the printed circuit board of the present embodiment includes a printed circuit board 1, a conductive pillar 2 and a screw 3. The printed circuit board 1 has a printed circuit and an electronic component soldered to the printed circuit, and the printed circuit board 1 has a through hole. The conductive pillar 2 may be made of a metal material (e.g., copper) with good conductivity and high strength, the outer diameter d2 of the conductive pillar 2 matches the diameter of the through hole on the printed circuit board 1 (i.e., the outer diameter of the conductive pillar 2 is equal to or slightly smaller than the diameter of the through hole), the conductive pillar 2 penetrates through the through hole on the printed circuit board 1 and is soldered to the printed circuit board 1, and the conductive pillar 2 is electrically connected to the ground terminal on the printed circuit board 1. When the conductive column 2 is soldered and fixed, the first end of the conductive column 2 protrudes from the back surface of the printed circuit board 1.
The conductive post 2 includes a fixing hole 21, and the fixing hole 21 axially penetrates the conductive post 2. The conductive post 2 is fixed to the ground member 4 by a screw 3 passing through the fixing hole 21 and is conductively connected to the ground member 4. When the conductive post 2 is secured to the ground member 4, the first end of the conductive post 2 is in conductive contact with the ground member 4. Of course, in practical applications, the screw 3 may be replaced by other fasteners, such as rivets, snaps, etc.
The grounding structure of the printed circuit board is electrically connected with the grounding end of the printed circuit board 1 and the grounding component 4 through the conductive column 2, so that the grounding is reliable, the conductive column 2 is not required to be manually inserted into the printed circuit board 1, and the automatic production is easy to realize.
In order to improve the grounding stability, the printed circuit board 1 may have a plurality of through holes, and each through hole is welded with one conductive column 2; each conductive post 2 is fixed to a grounding member 4 by a screw 3. Preferably, the plurality of through holes may be evenly distributed on the printed circuit board 1.
In the above-mentioned grounding structure of the printed circuit board, the conductive column 2 can be electrically connected to the grounding terminal on the printed circuit board 1 by the following method: the grounding terminal is composed of a grounding copper foil (the grounding copper foil is positioned on the front side of the printed circuit board 1) on the printed circuit board 1, a through hole is formed at the grounding copper foil, namely the through hole penetrates through the grounding copper foil, a copper plating layer (the copper plating layer can be formed in an electroplating mode) is added on the inner wall of the through hole, and the copper plating layer is electrically connected with the grounding copper foil in a conductive mode. In this way, an electrically conductive connection to the ground on the printed circuit board 1 is achieved when the conductive pin 2 passes through the through hole and is soldered to the printed circuit board 1. The structure has stable conductive connection performance.
Specifically, the electronic component is soldered to the front surface of the printed circuit board 1, and the conductive column 2 is fixed to the ground member 4 with the back surface of the printed circuit board 1 facing the ground member 4. Thus, the electronic components on the printed circuit board 1 do not affect the fixation of the conductive column, and the space of the grounding structure can be saved.
In order to improve the stability of the soldering portion between the conductive post 2 and the printed circuit board 1, the portion of the first end of the conductive post 2 protruding from the back surface of the printed circuit board 1 has a radial flange 22, and the diameter D of the outer periphery of the flange 22 is larger than the diameter of the through hole. Thus, when the conductive post 2 is fixed to the grounding member 4, the outer end of the flange 22 abuts against the grounding member 4, and the back surface of the printed circuit board 1 abuts against the inner end of the flange 22 and is stressed by the surface of the inner end of the flange 22, so that the solder joint between the conductive post 2 and the printed circuit board 1 is not loosened even after long-term use. The height H1 of the flange 22 may be adjusted according to the particular application.
The fixing hole 21 of the conductive post 2 may be a female screw hole, and the diameter d1 of the female screw hole matches the size of the screw 3. The screw 3 is screwed with the conductive post 2 when the conductive post 2 is fixed to the ground member 4. Through this mode, can further guarantee to lead electrical pillar 2 stable fixed, and can not appear rocking.
For the convenience of screwing operation, the second end of the conductive post 2 protrudes from the front surface of the printed circuit board, i.e. the height H of the main body portion of the conductive post 2 is greater than the thickness of the printed circuit board 1. Preferably, the height of the second end of the conductive post 2 protruding from the front surface of the printed circuit board 1 is 0.1-0.2 mm.
The embodiment of the utility model provides a still provide a direct current converter, including casing and as above printed circuit board's ground structure, wherein the ground connection component is the casing.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a ground structure of printed circuit board which characterized in that, includes printed circuit board, fastener and leads electrical pillar, wherein: the printed circuit board is provided with a through hole, the outer diameter of the conductive column is matched with the diameter of the through hole, the conductive column penetrates through the through hole and is welded and fixed to the printed circuit board, and the conductive column is in conductive connection with a grounding end on the printed circuit board; the first end of the conductive column protrudes out of the back surface of the printed circuit board; the conductive post includes a securing hole that extends axially therethrough, and is secured to and conductively coupled with a ground member by a fastener that passes through the securing hole.
2. The grounding structure of a printed circuit board according to claim 1, wherein the ground terminal is formed of a grounding copper foil on the printed circuit board, and the through hole passes through the grounding copper foil, an inner wall of the through hole has a copper plated layer, and the copper plated layer is electrically conductively connected to the grounding copper foil.
3. The ground structure of a printed circuit board according to claim 1, wherein an electronic component is soldered to a front surface of the printed circuit board, and the conductive post is fixed to the ground member with a rear surface of the printed circuit board facing the ground member.
4. The grounding structure of a printed circuit board according to claim 3, wherein the portion of the first end of the conductive post protruding from the back surface of the printed circuit board has a radial flange, and the diameter of the outer periphery of the flange is larger than the diameter of the through hole.
5. The pcb ground structure of claim 1, wherein the fastening member is a screw, the fixing hole is an internally threaded hole, and the screw is threadedly connected to the conductive post.
6. The printed circuit board grounding structure of claim 1, wherein said second end of said conductive post protrudes from a front surface of said printed circuit board.
7. The grounding structure of printed circuit board according to claim 6, wherein the height of the second end of the conductive post protruding from the front surface of the printed circuit board is 0.1-0.2 mm.
8. The grounding structure of the printed circuit board according to claim 1, wherein the printed circuit board has a plurality of through holes, and one conductive pillar is soldered to each through hole; each of the conductive posts is secured to the ground member by a fastener.
9. The printed circuit board ground structure of claim 8, wherein the plurality of vias are evenly distributed on the printed circuit board.
10. A dc converter comprising a chassis and a ground structure of a printed circuit board according to any one of claims 1 to 9, wherein the ground member is the chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821762497.0U CN209949518U (en) | 2018-10-29 | 2018-10-29 | Grounding structure of printed circuit board and direct current converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821762497.0U CN209949518U (en) | 2018-10-29 | 2018-10-29 | Grounding structure of printed circuit board and direct current converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209949518U true CN209949518U (en) | 2020-01-14 |
Family
ID=69118135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821762497.0U Active CN209949518U (en) | 2018-10-29 | 2018-10-29 | Grounding structure of printed circuit board and direct current converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209949518U (en) |
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2018
- 2018-10-29 CN CN201821762497.0U patent/CN209949518U/en active Active
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| CP03 | Change of name, title or address |
Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |