CN110572954A - pin assembly guide and circuit board assembly - Google Patents
pin assembly guide and circuit board assembly Download PDFInfo
- Publication number
- CN110572954A CN110572954A CN201910858132.0A CN201910858132A CN110572954A CN 110572954 A CN110572954 A CN 110572954A CN 201910858132 A CN201910858132 A CN 201910858132A CN 110572954 A CN110572954 A CN 110572954A
- Authority
- CN
- China
- Prior art keywords
- plate
- guide
- circuit board
- opening
- pin
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/182—Printed circuits structurally associated with non-printed electric components associated with components mounted in the printed circuit board, e.g. insert mounted components [IMC]
- H05K1/184—Components including terminals inserted in holes through the printed circuit board and connected to printed contacts on the walls of the holes or at the edges thereof or protruding over or into the holes
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/306—Lead-in-hole components, e.g. affixing or retention before soldering, spacing means
- H05K3/308—Adaptations of leads
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3447—Lead-in-hole components
Abstract
The embodiment of the invention provides a pin assembly guide piece and a circuit board assembly, wherein the pin assembly guide piece comprises a plate-shaped main body made of insulating materials, a plurality of guide holes and a fixing part are formed in the plate-shaped main body, and the guide holes respectively penetrate through the plate-shaped main body; each guide hole comprises a first opening positioned on the upper surface of the plate-shaped body, a second opening positioned on the lower surface of the plate-shaped body and a hole wall positioned between the first opening and the second opening, and the hole wall comprises a guide wall, the guide wall is formed from the second opening, and the cross section of the guide wall is gradually reduced to be adaptive to the size of the cross section of the pin to be inserted in the direction towards the upper surface of the plate-shaped body. According to the embodiment of the invention, the pins to be inserted are simultaneously guided into the welding holes of the printed circuit board through the guide holes on the pin assembly guide piece, so that the assembly efficiency of the printed circuit board is greatly improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of power electronics, in particular to a pin assembly guide piece and a circuit board assembly.
Background
The transistor (transistor) is a solid semiconductor device (including diode, triode, field effect transistor, thyristor, etc.), and has multiple functions of detecting, rectifying, amplifying, switching, voltage stabilizing, signal modulating, etc. The transistor, which is a type of variable current switch, is capable of controlling an output current based on an input voltage. Unlike ordinary mechanical switches, the transistor utilizes an electrical signal to control the on/off of the transistor, and the switching speed can be very fast and can reach over 100 GHz.
An IGBT (Insulated Gate Bipolar Transistor) is a composite fully-controlled voltage-driven power Semiconductor device composed of a Bipolar Transistor and an Insulated Gate Field Effect Transistor, has the advantages of both high input impedance of a MOSFET (Metal-Oxide-Semiconductor Field Effect Transistor) and low on-state voltage drop of a GTR (Giant Transistor), and is very suitable for application in the fields of a converter system with a dc voltage of 600V or more, such as an ac motor, a frequency converter, a switching power supply, an illumination circuit, traction drive, and the like.
In a distributed IGBT electronic control system (e.g., a motor controller), in order to ensure that the IGBT operates normally, heat generated during the operation of the IGBT needs to be dissipated quickly. At present, in order to realize the heat dissipation of the IGBT, each IGBT single tube (module) is usually mounted on a heat sink, and meanwhile, in order to realize the on-off control of the IGBT single tube, a control signal pin of each IGBT needs to be inserted into a circuit board and connected with the circuit board in a welding manner.
As shown in fig. 1, in the conventional distributed IGBT electric control system, when the IGBT single tubes are assembled, the IGBT single tubes are first fixed to a heat sink (the heat sink is installed in a box 10), then the laminated busbar 13 is welded to the dc pins and the ac pins of the IGBT single tubes, and finally, a circuit board is assembled, and the control signal pins 121 of the IGBT single tubes are welded and fixed to the circuit board 11. Because the number of the single IGBT tubes is large, the number of the control signal pins 121 is also large, and the position deviation of the control signal pins 121 of each single IGBT tube is large, it is very difficult to insert the control signal pins 121 of the single IGBT tubes into each solder hole of the circuit board 11, and the single IGBT tube is often manually allocated for more than 30 minutes, which not only wastes time and labor, but also cannot be assembled in batch.
disclosure of Invention
The embodiment of the invention provides a pin assembly guide part and a circuit board assembly, aiming at the problems that in the distributed IGBT electric control system, due to the fact that the number of control signal pins of single IGBT tubes is large and the position deviation is large, assembly of a circuit board is time-consuming and labor-consuming, and batch assembly cannot be achieved.
In an embodiment of the present invention, a technical solution for solving the above technical problem is to provide a pin assembly guide, including a plate-shaped main body made of an insulating material, the plate-shaped main body having a plurality of guide holes and a fixing portion, the guide holes respectively penetrating through the plate-shaped main body; each guide hole comprises a first opening positioned on the upper surface of the plate-shaped body, a second opening positioned on the lower surface of the plate-shaped body and a hole wall positioned between the first opening and the second opening, and the hole wall comprises a guide wall which is formed from the second opening and the cross section of which is gradually reduced to adapt to the size of the cross section of the pin to be inserted in the direction towards the upper surface of the plate-shaped body; the guide wall is used for guiding the pin to be plugged to be conveniently inserted into the second opening and penetrate through the plate-shaped body and then penetrate out of the first opening.
Preferably, the shape of the first opening and the second opening is one of a circle, an ellipse, a square, and a shape that fits the cross section of the required plug pin.
Preferably, the hole wall further comprises a cylindrical section connected to the guide wall, and the cylindrical section extends to the first opening.
Preferably, the guide wall extends from the second opening to the first opening.
preferably, the fixing part is a fixing column protruding from the upper surface of the plate-shaped main body; or the fixing part is a buckle protruding out of the upper surface of the plate-shaped main body; or, the fixing part is a hole for screw connection.
Preferably, the guide wall is a tapered surface or a spherical surface or a slanted surface.
Preferably, the plate-shaped main body comprises a plurality of partition ribs, the partition ribs respectively protrude from the upper surface of the plate-shaped main body, and adjacent first openings are separated by the partition ribs.
Preferably, the plate-shaped main body is provided with one or more lightening holes penetrating through the plate-shaped main body, and the upper surface of the plate-shaped main body is provided with at least one safety gauge shielding part.
The embodiment of the invention also provides a circuit board assembly, which comprises a printed circuit board and at least one pin assembly guide piece; the printed circuit board is provided with a plurality of welding holes for welding pins respectively; the pin assembly guide is fixed with the printed circuit board through the fixing part, the upper surface of the plate-shaped main body faces the printed circuit board, and the first opening is opposite to the position of the welding hole in the printed circuit board.
Preferably, the fixing part is located on the upper surface of the plate-shaped body, and the printed circuit board is provided with a fixing hole;
The fixing part is a fixing column, and the plate-shaped main body is fixed with the printed circuit board through interference fit or transition fit of the fixing column and the fixing hole;
Or, the fixing part is a nut post, the plate-shaped body is fixed to the printed circuit board by a screw, and the screw passes through a fixing hole of the printed circuit board and is screwed to the nut post;
Or, the fixed part is the buckle, just the platelike main part passes through the buckle joint is arrived the mode of fixed orifices is assembled to printed circuit board.
According to the pin assembly guide piece and the circuit board assembly provided by the embodiment of the invention, a plurality of pins to be inserted are simultaneously guided into the welding holes of the printed circuit board through the guide holes, so that the assembly efficiency of the printed circuit board is greatly improved. The embodiment of the invention can realize blind installation of the printed circuit board, shorten the installation time of the printed circuit board to about tens of seconds and realize batch production.
Drawings
FIG. 1 is a schematic diagram of an IGBT single tube assembly of a conventional distributed IGBT electric control system;
fig. 2 is a schematic structural view of a pin fitting guide provided in an embodiment of the present invention;
Fig. 3 is a schematic view of the back side of a pin mounting guide provided by an embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a guide hole in a pin fitting guide according to an embodiment of the present invention;
Fig. 5 is a schematic cross-sectional view of a guide hole in a pin fitting guide according to another embodiment of the present invention;
Fig. 6 is a schematic view of an assembly structure of a circuit board assembly according to an embodiment of the present invention;
Fig. 7 is a schematic structural diagram of a circuit board assembly according to an embodiment of the present invention;
Fig. 8 is a schematic diagram of a pin insertion guide implemented by using the circuit board assembly provided by the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further 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.
fig. 2-4 are schematic structural diagrams of a pin-mounting guide according to an embodiment of the present invention, which can be applied to a Printed Circuit Board (PCB) mounting process and improve the insertion of a plurality of pins of a plurality of components into solder holes of the PCB. The pin fitting guide of the present embodiment includes a plate-shaped body 2 made of an insulating material (e.g., plastic, etc.), the plate-shaped body 2 including an upper surface and a lower surface arranged in parallel, and the plate-shaped body 2 having a plurality of guide holes 21 and fixing portions 24 thereon. The plurality of guiding holes 21 respectively penetrate through the plate-shaped main body 2, and each guiding hole 21 includes a first opening 211, a second opening 212, and a hole wall 213 located between the first opening 211 and the second opening 212, wherein the first opening 211 is located on the upper surface of the plate-shaped main body 2, and the second opening 212 is located on the lower surface of the plate-shaped main body 2. The size of the first opening 211 is matched with the size of a pin to be plugged (for example, a control signal pin of an IGBT) (i.e., the size of the first opening 211 is equal to or slightly larger than the size of the pin to be plugged), and the size of the second opening 212 is larger than the size of the first opening 211 (i.e., the size of the second opening 212 is larger than the pin to be plugged).
The hole walls 213 have a smooth surface (i.e., no asperities, no step structures, etc.). Specifically, the hole wall 213 includes a guide wall formed from the second opening 212, and the cross section of the guide wall gradually decreases to fit the size of the cross section of the pin to be inserted in the direction toward the upper surface of the plate-like body 2. The guide wall is used to guide the pin to be inserted into the second opening 212 and pass through the plate-like body 2 to exit from the first opening 211.
In the pin assembling guide, since the size of the second opening 212 of the guide hole 21 is larger than that of the pin to be inserted, the pin to be inserted can be conveniently inserted into the guide hole 21 through the second opening 212 even if the position of the pin to be inserted is slightly deviated; since the cross section of the guide wall of the hole wall 213 of the guide hole 21 is gradually reduced in the pin insertion direction, the pin to be inserted can smoothly reach the first opening 211; moreover, since the size of the first opening 211 is matched with the size of the pin to be inserted, the direction in which the pin to be inserted extends from the guide hole 21 is fixed, so that the pin to be inserted is conveniently inserted into the soldering hole of the printed circuit board. Through the structure of the pin assembly guide piece, even if the deviation of a plurality of pins to be inserted is large, the plurality of pins to be inserted can be guided into each welding hole of the printed circuit board at one time, and the assembly efficiency of the printed circuit board is greatly improved. Moreover, through the structure of the pin assembly guide piece, blind assembly of the printed circuit board can be realized, the installation time of the printed circuit board is shortened to about dozens of seconds, and batch production can be realized.
In another embodiment of the present invention, the shapes of the first opening 211 and the second opening 212 may be one of a circle, an ellipse, a square, and a shape adapted to the cross section of the required plug pin, respectively, and a connection line between the center of the first opening 211 and the center of the second opening 212 is perpendicular to the upper surface and the lower surface of the plate-shaped body 2, that is, the central axis of the guiding hole 21 is perpendicular to the upper surface and the lower surface of the plate-shaped body 2. Accordingly, the guide wall of the hole wall 213 of the guide hole 21 is conical, elliptical conical, quadrangular pyramid, etc., so that the pin to be plugged can slide in the guide hole 21 without hindrance.
In order to make the direction of the pin to be inserted out of the guiding hole 21 more precise, as shown in fig. 5, the hole wall 213 of each guiding hole 21 may include a cylindrical section 2132 connected to the guiding wall, and the cylindrical section 2132 extends to the first opening 211. Specifically, when the first opening 211 is circular, the cylindrical section 2132 may be cylindrical (the diameter of the cylindrical section is equal to the diameter of the first opening 211, and the central axis of the cylindrical section is perpendicular to the upper surface of the plate-shaped body 2), so that the pin to be plugged can pass through the first opening 211 in a direction perpendicular to the upper surface of the plate-shaped body 2.
The fixing portion 24 is used to fix the plate-like body 2 to a printed circuit board. Specifically, the fixing portion 24 may be a fixing post protruding from the upper surface of the plate-shaped body 2, and the fixing post may be engaged with a fixing hole on the printed circuit board by interference or transition to fix the plate-shaped body 2 to the printed circuit board. Alternatively, the fixing portion 24 may be a clip protruding from the upper surface of the plate-shaped body 2, so that the plate-shaped body 2 can be mounted to the printed circuit board by being clipped into the fixing hole. In addition, or alternatively, the fixing portion may be a nut post (i.e., including a hole for screwing), in which case the plate-shaped body 2 may be fixed to the printed circuit board by a screw, which passes through the fixing hole of the printed circuit board and is screwed to the nut post.
In order to improve the anti-interference performance of each pin, the plate-shaped body 2 further includes a plurality of separating ribs 22, the separating ribs 22 respectively protrude from the upper surface of the plate-shaped body 2, and the first openings 211 of adjacent guiding holes are separated by the separating ribs 22. By the above-mentioned partition ribs 22, the creepage distance between the pins can be increased, and the interference between the adjacent pins can be reduced.
Similarly, a plurality of bosses 23 may be provided on the lower surface of the plate-like body 2 described above, and the second openings 212 of the guide holes 21 are located on the top surfaces of the bosses 23. In particular, a plurality of guiding holes 21 may pass through the same boss 23, and the plurality of guiding holes 21 are used for guiding the plug-in assembly of a plurality of pins of the same component (e.g. semiconductor power module), i.e. one boss 23 may have a plurality of second openings 212. The above-mentioned bosses 23 reduce interference between the pins of different components.
In addition, the upper surface of the plate-shaped body 2 may be further provided with at least one safety shielding part 26, and the safety shielding part 26 may be located at one end of the plate-shaped body 2 and may protrude from the surface of the plate-shaped body 2 to improve the safety of the pin assembly guide.
In order to reduce the material consumption of the pin assembly guide and reduce the weight of the pin assembly guide, one or more lightening holes 25 can be arranged on the plate-shaped main body 2 on the basis of meeting the structural strength, and the lightening holes 25 penetrate through the plate-shaped main body 2.
specifically, when the pin fitting guide is used to realize fitting guide with a plurality of semiconductor power modules, since the semiconductor power modules are generally arranged in a straight line, the guide holes 21 on the plate-like body 2 may be arranged in two rows, and a plurality of lightening holes 25 are located between the two rows of guide holes 21, i.e., one pin fitting guide may realize fitting guide of control signal pins of two rows of semiconductor power modules.
As shown in fig. 6-8, embodiments of the present invention also provide a circuit board assembly that can be assembled to a distributed IGBT electronic control system (e.g., a motor controller) and enable soldering of pins of multiple components. The circuit board assembly of the present embodiment includes the printed circuit board 3 and three pin-mounting guides as described above. The printed circuit board 3 has a plurality of solder holes 31 for soldering component pins (control signal pins of the semiconductor power module), respectively; the number and distribution of the solder holes 31 may be determined according to the number and distribution of pins of a component in a system to which the circuit board assembly is applied, and the number of pin-mounting guides in the circuit board assembly may be determined according to the number and distribution of the solder holes 31. Specifically, the pin-fitting guide is fixed to the printed circuit board 3 in such a manner that the plate-like body 2 is parallel to the printed circuit board 3, and the upper surface of the plate-like body 2 faces the printed circuit board 3, and the first opening of the guide hole 21 is opposed to the position of the solder hole 31 on the printed circuit board 3.
through the structure, when the circuit board assembly is assembled, the circuit board assembly can be directly pushed towards the pins of the plurality of components, and because the size of the second opening 212 of the guide hole 21 is larger than that of the pins, the pins of each component can be respectively inserted into the guide holes 21 through the second openings 212 of the guide holes 21 and inserted into the soldering holes 31 under the guidance of the guide holes 21, so that the assembly efficiency of the printed circuit board 3 is greatly improved.
The printed circuit board 3 may further include a plurality of fixing holes 32, and the positions and the number of the fixing holes 32 may correspond to the fixing portions 24 of the plate-shaped body 2. Specifically, when the fixing portion 24 is a fixing column, the plate-shaped main body 2 may be fixed to the printed circuit board 3 by interference or transition fit of the fixing column and the fixing hole; alternatively, when the fixing portion 24 is a nut post, the plate-like body 2 may be fixed to the printed circuit board 3 by a screw, which passes through the fixing hole 32 of the printed circuit board 3 and is screwed to the nut post; alternatively, when the fixing portion 24 is a clip, the plate-shaped body 2 may be fitted to the printed circuit board 3 by being clipped to the fixing hole by the above-described clip. .
In particular, when the above-described circuit board assembly is applied to an apparatus having a plurality of semiconductor power modules, since the plurality of semiconductor power modules are generally arranged in a straight line, the solder holes 31 on the printed circuit board 3 are arranged in a plurality of groups (for example, two lines per group), and the circuit board assembly mounts a plurality of lead mounting guides in accordance with the number of the groups in which the solder holes 31 are arranged, and the plate-shaped body 2 of each lead guide corresponds to the position of one group of solder holes.
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 are included in the scope of 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 pin assembling guide piece is characterized by comprising a plate-shaped main body made of insulating materials, wherein the plate-shaped main body is provided with a plurality of guide holes and a fixing part, and the guide holes respectively penetrate through the plate-shaped main body; each guide hole comprises a first opening positioned on the upper surface of the plate-shaped body, a second opening positioned on the lower surface of the plate-shaped body and a hole wall positioned between the first opening and the second opening, and the hole wall comprises a guide wall which is formed from the second opening and the cross section of which is gradually reduced to adapt to the size of the cross section of the pin to be inserted in the direction towards the upper surface of the plate-shaped body; the guide wall is used for guiding the pin to be plugged to be conveniently inserted into the second opening and penetrate through the plate-shaped body and then penetrate out of the first opening.
2. The pin assembly guide of claim 1, wherein the first and second openings are one of circular, oval, square, and shaped to accommodate a desired cross-section of the plug pin.
3. the pin assembly guide of claim 1, wherein the bore wall further comprises a cylindrical section connected to the guide wall, and the cylindrical section extends to the first opening.
4. The pin assembly guide of claim 1, wherein the guide wall extends from the second opening to the first opening.
5. The pin fitting guide according to claim 1, wherein the fixing portion is a fixing post projecting from an upper surface of the plate-shaped body; or the fixing part is a buckle protruding out of the upper surface of the plate-shaped main body; or, the fixing part is a hole for screw connection.
6. The pin assembly guide of claim 1, wherein the guide wall is tapered or spherical or beveled.
7. the pin fitting guide according to claim 1, wherein the plate-shaped body includes a plurality of partition ribs protruding from an upper surface of the plate-shaped body, and adjacent first openings are separated from each other by the partition ribs.
8. The pin assembly guide of claim 1, wherein the plate-like body has one or more lightening holes therethrough, and the upper surface of the plate-like body has at least one safety shield.
9. A circuit board assembly comprising a printed circuit board and at least one pin mounting guide according to any one of claims 1-8; the printed circuit board is provided with a plurality of welding holes for welding pins respectively; the pin assembly guide is fixed with the printed circuit board through the fixing part, the upper surface of the plate-shaped main body faces the printed circuit board, and the first opening is opposite to the position of the welding hole in the printed circuit board.
10. The circuit board assembly according to claim 8, wherein the fixing portion is located on an upper surface of the plate-shaped body, and the printed circuit board has a fixing hole thereon;
The fixing part is a fixing column, and the plate-shaped main body is fixed with the printed circuit board through interference fit or transition fit of the fixing column and the fixing hole;
or, the fixing part is a nut post, the plate-shaped body is fixed to the printed circuit board by a screw, and the screw passes through a fixing hole of the printed circuit board and is screwed to the nut post;
Or, the fixed part is the buckle, just the platelike main part passes through the buckle joint is arrived the mode of fixed orifices is assembled to printed circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910858132.0A CN110572954A (en) | 2019-09-11 | 2019-09-11 | pin assembly guide and circuit board assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910858132.0A CN110572954A (en) | 2019-09-11 | 2019-09-11 | pin assembly guide and circuit board assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110572954A true CN110572954A (en) | 2019-12-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910858132.0A Pending CN110572954A (en) | 2019-09-11 | 2019-09-11 | pin assembly guide and circuit board assembly |
Country Status (1)
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| CN (1) | CN110572954A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112349596A (en) * | 2020-10-29 | 2021-02-09 | 广东芯聚能半导体有限公司 | IGBT module pin manufacturing method and IGBT module |
| CN114630494A (en) * | 2022-05-12 | 2022-06-14 | 之江实验室 | Interconnection structure of wafer integrated system and top PCB and manufacturing method thereof |
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Application publication date: 20191213 |