CN114126192A - Strain-reducing circuit board - Google Patents
Strain-reducing circuit board Download PDFInfo
- Publication number
- CN114126192A CN114126192A CN202111254299.XA CN202111254299A CN114126192A CN 114126192 A CN114126192 A CN 114126192A CN 202111254299 A CN202111254299 A CN 202111254299A CN 114126192 A CN114126192 A CN 114126192A
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- China
- Prior art keywords
- circuit board
- fastener
- connecting plate
- hole
- strain relief
- 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
Links
- 238000003466 welding Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Images
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
- H05K1/02—Details
- H05K1/0271—Arrangements for reducing stress or warp in rigid printed circuit boards, e.g. caused by loads, vibrations or differences in thermal expansion
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mounting Of Printed Circuit Boards And The Like (AREA)
Abstract
The application discloses a strain relief circuit board, comprising a circuit board and a fastener mounting member; the fastener mounting piece comprises a first connecting plate, a second connecting plate and an elastic bracket; the first connecting plate is connected with the second connecting plate; the first connecting plate is used for abutting against the top surface of the circuit board; the second connecting plate is used for abutting against the side edge of the circuit board; the circuit board is provided with a fastener through hole for accommodating a fastener, the first connecting plate is provided with a fastener mounting hole matched with the fastener through hole, and the fastener mounting part is arranged at the mechanical hole of the circuit board, so that the strain generated on elements on the circuit board after the bolt is screwed down is obviously reduced; the damage to parts and welding spots on the printed circuit board is effectively reduced, and the reliability of elements on the printed circuit board is improved; the degree of freedom of element arrangement on the printed circuit board is improved, and the utilization rate of space on the board is improved; the product quality is improved, the total weight of the printed circuit board is reduced, and the cost is saved.
Description
Technical Field
The application relates to the field of printed circuit board assemblies of electronic equipment, in particular to a strain reducing circuit board.
Background
Currently, in the field of printed circuit board assembly, in order to fix the printed circuit board with other parts or to use the printed circuit board for grounding design, a through hole is usually formed on the printed circuit board, such through hole is called a mechanical hole 11 (as shown in fig. 1), and other parts are connected by a fastener (bolt or nut), and in order to ensure the strength and crush resistance of such mechanical hole, a metal round sleeve is often inserted therein. However, when the fastener is tightened through the mechanical hole, tightening torque is generated and transmitted to the circuit board through friction, which may cause a certain degree of strain to the circuit board, and the strain on the printed circuit board is increased as the position of the mechanical hole is closer, and if the strain exceeds a specified limit, the component or the solder joint of the component on the printed circuit board may be damaged, and even the component on the printed circuit board may be directly failed.
In order to reduce the damage of the tightening stress to the components and welding points on the board, a flat washer is usually added on the plane where the fastener contacts the mechanical hole, but the effect is limited; or when the printing plate is designed, the element is arranged far away from the mechanical hole to reduce the influence of strain; or the substrate of the printed circuit board is thickened to increase its rigidity so that the strain of the adjacent element can be reduced.
However, the above measures increase the overall weight and cost of the printed circuit board, and reduce the flexibility of the design of the components on the printed circuit board and the utilization of the space on the printed circuit board.
Disclosure of Invention
To solve the technical problems in the prior art, the application provides a strain reduction circuit board which can reduce the damage of elements and welding spots on the circuit board and can improve the space utilization rate of the circuit board.
The application is realized by the following technical scheme:
a strain relief circuit board comprising a circuit board and a fastener mount; the fastener mount includes a first web and a second web; the first connecting plate is connected with the second connecting plate; the first connecting plate is used for abutting against the top surface of the circuit board; the second connecting plate is used for abutting against the side edge of the circuit board; the circuit board is provided with a fastener through hole for accommodating a fastener, and the first connecting plate is provided with a fastener mounting hole matched with the fastener through hole.
Further, a flange protruding out of the first connecting plate is arranged on one side, facing the circuit board, of the fastener mounting hole, the flange is matched with the fastener through hole, and the flange is used for abutting against the inner wall of the fastener through hole.
Further, the first connecting plate is provided with a first end facing the second connecting plate and a second end far away from the second connecting plate, and the major diameter of the first end is larger than that of the second end.
Further, the length of the second connecting plate in the plate surface direction of the circuit board is greater than or equal to the length of the first end of the first connecting plate.
Further, the first connecting plate is of an axisymmetrical structure.
Further, the fastener mounting hole is provided at a central position of the first connection plate.
Further, the fastener installed part still includes the elastic support, and the elastic support is connected with the second connecting plate, and the elastic support is used for the bottom surface butt with the circuit board.
Further, the elastic support comprises a first fixing pressing piece and a second fixing pressing piece.
Further, the fastener mount is a U-shaped open structure.
Further, the fastener mount is an integrally formed structure.
Adopt above-mentioned technical scheme, the circuit board that subtracts strain that this application disclosed has following beneficial effect:
the strain-reducing circuit board can obviously reduce the strain generated on elements on the circuit board after the bolt is screwed; the damage to parts and welding spots on the printed circuit board is effectively reduced, and the reliability of elements on the printed circuit board is improved; the degree of freedom of element arrangement on the printed circuit board is improved, and the utilization rate of space on the board is improved; the product quality is improved, the total weight of the printed circuit board is reduced, and the cost is saved.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a schematic diagram of a prior art circuit board including mechanical holes;
FIG. 2 is a schematic view of a strain relief circuit board according to an embodiment of the present application;
FIG. 3 is a schematic structural view of a fastener mount according to an embodiment of the present application;
FIG. 4 is a schematic view of another angle of a fastener mount according to embodiments of the present application;
FIG. 5 is a bottom view of a fastener mount according to embodiments of the present application
FIG. 6 is a side view of a fastener mount according to embodiments of the present application
FIG. 7 is a top view of a fastener mount according to embodiments of the present application
Wherein the reference numerals in the figures correspond to: 1-first connecting plate, 2-second connecting plate, 3-fastener mounting hole, 4-flange, 5-elastic support, 11-mechanical hole, 12-circuit board and 13-electronic element.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that in the description of the present application, it is to be understood that the terms "top", "bottom", "side", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only used for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
Example one
In one embodiment, a strain relief circuit board is provided, as shown in fig. 2, the strain relief circuit board includes a circuit board and a fastener mounting member, wherein a plurality of electronic components and fastener through holes (mechanical holes) are mounted on the circuit board, the number of the fastener through holes is not limited, the fastener mounting member is nested with the circuit board through the fastener through holes (mechanical holes), and the contact surfaces of the fastener mounting member and the surface where the circuit board meets are closely attached to form the strain relief circuit board.
In the embodiment of the application, as shown in fig. 3 and 4, the fastener mounting member comprises a first connecting plate 1, a second connecting plate 2 and an elastic bracket 5; the thicknesses of the first connecting plate 1 and the second connecting plate 2 are equal, and the first connecting plate 1 is connected with the second connecting plate 2; the first connecting plate 1 is used for abutting against the top surface (the surface welded with a plurality of electronic elements) of the circuit board; the second connecting plate 2 is used for abutting against the side edge of the circuit board; the circuit board is provided with a fastener through hole (i.e. a mechanical hole) for accommodating a fastener, the first connecting plate 1 is provided with at least one fastener mounting hole 3 matched with the fastener through hole (i.e. the mechanical hole), and the number of the fastener mounting holes 3 is not limited.
In the embodiment of the application, the first connecting plate 1 and the second connecting plate 2 of the fastener mounting part are perpendicular to each other, the first connecting plate 1 is attached to the surface of the circuit board, the first connecting plate 1 is parallel to the top surface of the circuit board, the second connecting plate 2 is attached to the surface of the circuit board, the second connecting plate 2 is parallel to the side surface of the circuit board, the elastic support 5 of the fastener mounting part and the second connecting plate 2 form a three-dimensional surface with an angle smaller than 90 degrees, so that the elastic support 5 is elastically attached to the bottom of the circuit board through fixing pressing sheets, at least two fixing pressing sheets are not limited in number, the length of the fixing pressing sheets is equal to that of the first connecting plate 1, the first connecting plate 1 is connected with the second connecting plate 2 to form a right-angle surface, the second connecting plate 2 and the elastic support 5 form another three-dimensional surface, and the two three-dimensional surfaces are fastened to the edge of the circuit board, the fastener mounting hole 3 of fastener installed part is used for being provided with the flange 4 that protrudes in first connecting plate 1 towards one side of circuit board fastener through-hole (being the mechanical hole) inner wall, the height less than or equal to the height of flange 4, the installation of being convenient for, flange 4 cooperatees with the fastener through-hole (being the mechanical hole) that the circuit board was equipped with, flange 4 is used for the inner wall looks butt of the fastener through-hole (being the mechanical hole) that is equipped with the circuit board, flange 4 cooperation fastener through-hole makes the fastener installed part rotate with the centre of a circle of fastener through-hole (being the mechanical hole), but make the fastener installed part can not rotate with the centre of a circle of fastener through-hole (being the mechanical hole) under the effect of first connecting plate, second connecting plate and 5 common forces of elastic support, make the stable firm straining of fastener installed part on the circuit board.
In the embodiment of the application, a first connecting plate 1 of a fastener mounting piece is provided with a first end facing a second connecting plate 2 and a second end far away from the second connecting plate 2, the major diameter of the first end is larger than that of the second end, the first end of the first connecting plate 1 is rectangular, the second end of the first connecting plate 1 is circular, the shape of the second end of the first connecting plate 1 is the same as that of a fastener mounting hole 3, the circular shape of the second end of the first connecting plate 1 is larger than that of the fastener mounting hole 3, so that a fastener is convenient to mount, the second connecting plate 2 is rectangular, the major diameter of the first end of the first connecting plate 1 is equal to that of the second connecting plate, and the length of one end, connected with the first connecting plate 1, of the second connecting plate 2 is equal to that of the other end of the second connecting plate 2; the big diameter of the first end of the first connecting plate 1 is larger than the big diameter of the second end, the big diameter of the first end of the first connecting plate 1 is equal to the length of the second connecting plate, and the lengths of the two ends of the second connecting plate are equal, so that the stress on the side edge of the circuit board is more stable, and the stability of connection between the circuit board and the fastener is better.
In the embodiment of the application, the first connecting plate 1 of the fastener mounting member is an axisymmetric structure, and at least one fastener mounting hole 3 is formed in the center of the first connecting plate 1. So that the fastener is more uniformly stressed when connected to the circuit board by the fastener mount, which in one embodiment may be a bolt and nut.
In the embodiment of the application, in order to better fix the fastener mounting part with the circuit board, the fastener mounting part further comprises an elastic support 5, the elastic support 5 is connected with the second connecting plate 2, the thickness of the elastic support 5 is equal to that of the first connecting plate 1 and the second connecting plate 2, and the elastic support 5 is used for being abutted to the bottom surface of the circuit board. The elastic bracket 5 includes a first fixing pressing piece 6 and a second fixing pressing piece 7. The elastic support 5 comprises at least two fixing pressing sheets, and the number of the fixing pressing sheets is not limited.
In the embodiment of the application, three surfaces of the first connecting plate 1, the second connecting plate 2 and the elastic bracket 5 in the fastener mounting part are connected to form a U-shaped opening end structure of the fastener mounting part, wherein the opening is one end of the first connecting plate 1 and one end of the elastic bracket 5, and the opening is arranged on the side of the circuit board of the fastener mounting part and is tightly attached to the circuit board.
In the embodiment of the application, the fastener mounting piece is of an integrally formed structure, is solid and firm, has a simple structure, and reduces the cost.
In some embodiments, the fastener mount may be a thin steel sheet with high crush strength, good electrical conductivity, and low cost.
This application embodiment has increased installation fastener installed part through at the circuit board, wherein flange 4 and the circuit board mechanical hole inner wall looks butt that the fastener mounting hole of fastener installed part set up, the first connecting plate 1 and the circuit board top looks butt of fastener installed part, the second connecting plate 2 and the circuit board side looks butt of fastener installed part, the elastic support 5 and the circuit board bottom looks butt of fastener installed part, multi-direction butt makes the fastener installed part be fixed in on the circuit board, has constituted the circuit board that subtracts to meet an emergency.
Specifically, when the strain relief circuit board is fixed with other parts or used for ground design, the strain relief circuit board is screwed up through the fastener mounting hole 3 arranged on the fastener mounting piece by a fastener (a bolt or a nut and the like), torque can be generated between the fastener and the strain relief circuit board under the action of friction force during screwing up, but the second connecting plate 2 of the fastener mounting piece is abutted to the top of the circuit board through the first connecting plate 1 of the fastener mounting piece, the elastic support of the fastener mounting piece is abutted to the bottom of the circuit board in an elastic manner, under the combined action, the second connecting plate 2 of the fastener mounting piece is tightly buckled with the side edge of the circuit board, the torque generated under the action of friction force disappears when the fastener (the bolt or the nut and the like) at the fastener mounting hole is prevented by the action force at the side edge of the circuit board, and strain borne by an element on the remarkable strain relief board is reduced.
Thus, by adding the fastener mounting member according to the embodiments of the present application, the strain generated on the components on the circuit board after the fastener (bolt) is tightened through the fastener mounting hole according to the above embodiments of the present application can be significantly reduced; the damage to parts and welding spots on the printed circuit board is effectively reduced, and the reliability of elements on the printed circuit board is improved; the degree of freedom of element arrangement on the printed circuit board is improved, and the utilization rate of space on the board is improved; the product quality is improved, the total weight of the printed circuit board is reduced, and the cost is saved.
Example two
The second embodiment provides the strain relief circuit board provided in the first embodiment, which is different from the first embodiment in that the length of the second connecting plate 2 in the board surface direction of the circuit board is greater than the length of the second end of the first connecting plate 1.
Specifically, other parts in the second embodiment are the same as those in the first embodiment, and are not described herein again.
The second embodiment provides a subtract circuit board that meets an emergency, adopt the length that the ascending length of face direction of following the circuit board of second connecting plate 2 is greater than the length of first connecting plate 1's second end, can increase fastener installed part lateral force on the one hand, make the more effective disappearance of moment of torsion that the action of frictional force produced when the fastener of fastener mounting hole 3 department is screwed up, on the other hand, the length of face direction of following the circuit board of second connecting plate 2 is longer more, make its area of contact with the circuit board more, more firm the installation on the circuit board.
EXAMPLE III
The third embodiment provides a strain relief circuit board provided in the first embodiment, which is different from the first embodiment in that the first connecting plate 1 of the fastener mounting member includes two fastener mounting holes 3.
Specifically, other parts in the third embodiment are the same as those in the first embodiment, and are not described herein again.
The third embodiment provides a strain relief circuit board, wherein the first connecting plate 1 adopting the fastener mounting member comprises two fastener mounting holes 3, the two fastener mounting holes 3 are arranged in parallel at the central position of the first connecting plate 1, when the strain relief circuit board is fixed with other parts or used for grounding design, the two fastener mounting holes 3 enable the fastener mounting member to be mounted on the circuit board more stably, and connection of the strain relief circuit board with other parts is also more stable.
While the foregoing is directed to embodiments of the present application, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (10)
1. A strain relief circuit board comprising a circuit board and a fastener mount;
the fastener mount comprises a first web (1) and a second web (2); the first connecting plate (1) is connected with the second connecting plate (2); the first connecting plate (1) is used for abutting against the top surface of the circuit board; the second connecting plate (2) is used for abutting against the side edge of the circuit board;
the circuit board is provided with a fastener through hole for accommodating a fastener, and the first connecting plate (1) is provided with a fastener mounting hole (3) matched with the fastener through hole.
2. Strain relief circuit board according to claim 1, wherein the fastener mounting hole (3) is adapted to be provided with a flange (4) protruding from the first connection plate (1) towards a side of the circuit board, the flange (4) being adapted to cooperate with the fastener through hole, the flange (4) being adapted to abut against an inner wall of the fastener through hole.
3. Strain relief circuit board according to claim 1, wherein the first connection plate (1) is provided with a first end towards the second connection plate (2) and a second end (2) away from the second connection plate, the first end having a larger diameter than the second end.
4. The strain relief circuit board according to claim 1, wherein the length of the second connection plate (2) in the board surface direction of the circuit board is equal to or greater than the length of the first end of the first connection plate (1).
5. Strain relief circuit board according to claim 1, characterized in that the first connection plate (1) is of an axisymmetric structure.
6. The strain relief circuit board according to claim 1, wherein the fastener mounting hole (3) is provided at a central position of the first connection plate (1).
7. Strain relief circuit board according to claim 1, wherein the fastener mounting further comprises a resilient bracket (5), the resilient bracket (5) being connected to the second connection plate (2), the resilient bracket (5) being adapted to abut the bottom surface of the circuit board.
8. Strain relief circuit board according to claim 7, wherein the resilient support (5) comprises a first fixing tab (6) and a second fixing tab (7).
9. The strain relief circuit board of claim 1, wherein the fastener mount is a U-shaped open structure.
10. The strain relief circuit board of claim 1, wherein the fastener mount is a unitary structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111254299.XA CN114126192A (en) | 2021-10-27 | 2021-10-27 | Strain-reducing circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111254299.XA CN114126192A (en) | 2021-10-27 | 2021-10-27 | Strain-reducing circuit board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114126192A true CN114126192A (en) | 2022-03-01 |
Family
ID=80376972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111254299.XA Pending CN114126192A (en) | 2021-10-27 | 2021-10-27 | Strain-reducing circuit board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114126192A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020057556A1 (en) * | 2000-11-14 | 2002-05-16 | Nec Corporation | Deformation-resistant mounting structure of portable device |
| WO2007068663A1 (en) * | 2005-12-14 | 2007-06-21 | Robert Bosch Gmbh | Circuit arrangement comprising a mechanical damping element |
| US20140140017A1 (en) * | 2012-11-21 | 2014-05-22 | Hon Hai Precision Industry Co., Ltd. | Electronic device with card bracket |
| CN110868795A (en) * | 2019-11-27 | 2020-03-06 | 浙江君浩电子股份有限公司 | Prevent printed circuit board that scrapes |
| CN213028673U (en) * | 2020-08-18 | 2021-04-20 | 深圳市安华光电技术有限公司 | DMD component and electronic equipment |
-
2021
- 2021-10-27 CN CN202111254299.XA patent/CN114126192A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020057556A1 (en) * | 2000-11-14 | 2002-05-16 | Nec Corporation | Deformation-resistant mounting structure of portable device |
| WO2007068663A1 (en) * | 2005-12-14 | 2007-06-21 | Robert Bosch Gmbh | Circuit arrangement comprising a mechanical damping element |
| US20140140017A1 (en) * | 2012-11-21 | 2014-05-22 | Hon Hai Precision Industry Co., Ltd. | Electronic device with card bracket |
| CN110868795A (en) * | 2019-11-27 | 2020-03-06 | 浙江君浩电子股份有限公司 | Prevent printed circuit board that scrapes |
| CN213028673U (en) * | 2020-08-18 | 2021-04-20 | 深圳市安华光电技术有限公司 | DMD component and electronic equipment |
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