CN208955229U - A kind of pcb board ground structure - Google Patents
A kind of pcb board ground structure Download PDFInfo
- Publication number
- CN208955229U CN208955229U CN201820996646.3U CN201820996646U CN208955229U CN 208955229 U CN208955229 U CN 208955229U CN 201820996646 U CN201820996646 U CN 201820996646U CN 208955229 U CN208955229 U CN 208955229U
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- China
- Prior art keywords
- pcb board
- hole
- ground connection
- circular ring
- screw
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
Abstract
The utility model discloses a kind of pcb board ground structure for electronic equipment, including internal screw thread earthing rod, pcb board and metallic combination screw.When electronic equipment needs anti-interference ground connection, pcb board is connected on internal screw thread earthing rod by screw assemblies, pcb board ground connection can be realized；When not needing anti-interference ground connection, back-outs screw assemblies not with the metal ring contact pads on pcb board, that is, can reach the earth-free purpose of pcb board；It falling, screw assemblies can be screwed into disposed proximally threaded hole when to prevent screw assemblies from back-outing, in case required when ground connection.The mode of ground connection can be single-point, multiple spot, this method increases a kind of selection compared with cabling ground connection, be applicable in reliable.
Description
Technical field
The utility model relates to the pcb boards in a kind of electronic equipment, more particularly, to a kind of jamproof ground junction of pcb board
Structure.
Background technique
Good ground connection has a good shielding action to electromagnetic field, a large amount of charge that can be accumulated on release device casing,
To avoid generating static discharge effect.It is divided into two ground on entire printed circuit board, systematically and greatly.If it is metal
Shell, then entire metal shell is exactly that greatly, the ground wire of power supply is connected with the earth, total interface needs to be connected with the earth, spiral shell
Nail will also be connected with the earth, EMC test in the interference that enters directly from systematically releasing to greatly, to guarantee that it is not interfered
Its built-in system.At present in industrial electrical electronic equipment on the grounding of pcb board, most of equipment make pcb board by conducting wire
Ground connection, or directly connect pcb board with the earth using screw.These modes can make to produce in the presence of wordy, production conducting wire is grounded
The problems such as product increased costs, and keep equipment overall structure not beautiful enough by conducting wire connection, using screw directly by pcb board and ground
Connection, there is also pcb board selections to be grounded not flexible, inconvenient disadvantage.
Summary of the invention
For the above demand and to improving in place of the deficiencies in the prior art, the utility model provides a kind of for electronics
The compact layout of equipment, cabling is succinct, and the structure of ground connection may be selected, and is easily installed and demolition and maintenance and cost is relatively low.
To solve the above problems, the utility model pcb board ground structure includes internal screw thread earthing rod, pcb board and metal group
It closes screw and the threaded hole and through-hole for metallic combination screw, the positive table of threaded hole is opened up for the pcb board of two-sided clad with metal foil
Face is concentric nonmetallic circular ring, and through-hole front surface is concentric loop pad, is arranged between annulus pad inner circle and through-hole small nonmetallic
Annulus；The pcb board bottom surface of corresponding threaded hole and through-hole, is concentric nonmetallic circular ring.When electronic equipment needs are anti-interference
When ground connection, pcb board is crimped on electric conductor internal screw thread earthing rod by metallic combination screw, and any grounding point of pcb board can be realized
Ground connection.For single side, that is, front clad with metal foil pcb board, the pcb board bottom surface of corresponding threaded hole and through-hole does not need to remove
Metal foil is at nonmetallic circular ring.
In said structure, nonmetallic circular ring front surface and bottom surface need using chemistry the pcb board of clad with metal foil
Or mechanical system removes metal foil and exposes insulating substrate, nonmetallic circular ring outer diameter is greater than metallic combination bolt washer outer diameter and interior spiral shell
Line earthing rod outer diameter, and guarantee electrical safety distance, including minimum spacing and creepage distance.
Metallic combination screw used be plus spring washer, plain washer three screw assemblies of national standard, when electronic equipment not
When needing anti-interference ground connection, screw assemblies back-out a part and do not disengage internal screw thread earthing rod, washer not with the circle on pcb board
Ring contact pads can reach earth-free purpose, because internal screw thread earthing rod is non-conductive to the nonmetallic circular ring of pcb board bottom surface,
Small nonmetallic circular ring then ensure that the electrical safety distance with screw assemblies.
It is fallen when to prevent screw assemblies from back-outing, threaded hole is set on pcb board, screw assemblies are threaded into hole solid
It is fixed, in case required when being grounded again.Threaded hole can be set to be not required on the pcb board of metallization in tow sides and inner hole,
It may be provided at any nonconducting place near casing or pcb board, for placing the metallic combination screw back-outed completely.
The utility model provides flexible one kind, simplicity, cost-saving, the ground structure that ground connection may be selected, ground connection for pcb board
Mode can be single-point, multiple spot.
Detailed description of the invention
The utility model is described in further detail with reference to the accompanying drawing.
Fig. 1 is a kind of perspective view of pcb board ground structure of the utility model.
Fig. 2 is the ground plan of pcb board backsight shown in Fig. 1.
Specific embodiment
Such as the perspective view of Fig. 1 single-point grounding structure, it is used for frequency converter pcb board earthing or grounding means, by part copper or the interior spiral shell of aluminium
Line earthing rod 1, double-sided PCB board 2 and three screw assemblies 6 composition, wherein pcb board opens up a threaded hole 7, specification and screw assemblies 3
Identical, another hole opens up three screw assemblies, 3 through-hole 5, and 2 surface annulus pad 3 of pcb board and through-hole 5 are concentric circles, outer diameter and group
3 plain washer outer diameter of screw adaptation is closed, the use of pcb board copper foil surface wards off process of tin and annulus pad 3 is made.3 internal diameter of annulus pad is big
In the aperture of through-hole 5, surface forms small nonmetallic circular ring 4, i.e., the exposed insulating substrate of foil pcb board 2 is covered without metal.
Fig. 2 shows pcb board bottom surfaces to remove two nonmetallic circular rings 8 that metal copper foil obtains, and corresponding outer diameter is greater than
6 plain washer outer diameter of 1 outer diameter of internal screw thread earthing rod and screw assemblies is insulating substrate for single-sided printed board bottom surface, does not need to remove
Remove metal copper foil.
The first embodiment of the utility model is that pcb board 2 is fixed on internal screw thread earthing rod 1 by screw assemblies 6
With greatly communicate.Second of embodiment is to back-out screw assemblies 6 not contact with the metal ring pad 3 on pcb board 2, operation
On unscrew a tooth one, two circle, realize pcb board 2 it is earth-free.The third embodiment is equally that pcb board 2 is earth-free, directly by group
It closes screw 6 to be screwed into disposed proximally threaded hole 7, in case required when ground connection, this obvious reliability of method is higher.
Claims (4)
1. a kind of pcb board ground structure is used for electronic equipment, it is characterised in that: the ground structure includes internal screw thread earthing rod
(1), pcb board (2) and metallic combination screw (6), the pcb board (2) open up the threaded hole (7) of metallic combination screw (6) and lead to
Hole (5), threaded hole (7) front surface are concentric nonmetallic circular ring (8), and through-hole (5) front surface is concentric annulus pad
(3), it is arranged between annulus pad (3) inner circle and through-hole (5) small nonmetallic circular ring (4)；The corresponding threaded hole (7) and through-hole (5)
Pcb board (2) bottom surface, be concentric nonmetallic circular ring (8)；Pcb board (2) is crimped on by the metallic combination screw (6)
On electric conductor internal screw thread earthing rod (1), any grounding point ground connection of pcb board (2) can be realized.
2. a kind of pcb board ground structure according to claim 1, it is characterised in that: nonmetallic circular ring (8) front surface
And bottom surface needs to remove metal foil and exposes insulating substrate, nonmetallic circular ring (8) outer diameter is big for the pcb board (2) of clad with metal foil
In corresponding metallic combination screw (6) washer outer diameter and internal screw thread earthing rod (1) outer diameter, and guarantee electrical safety distance.
3. a kind of pcb board ground structure according to claim 1 or 2, it is characterised in that: the metallic combination screw (6)
Select plus spring washer, plain washer three screw assemblies, when the plain washer that it is back-outed not with the annulus pad (3) on pcb board (2)
Contact can reach earth-free purpose, and small nonmetallic circular ring (4) guarantees its electrical safety distance.
4. a kind of pcb board ground structure according to claim 3, it is characterised in that: the threaded hole (7) is arranged positive and negative
Two sides and inner hole are not required on the pcb board (2) of metallization, or setting casing or pcb board (2) nearby it is any nonconductingly
Side, for placing the metallic combination screw (6) back-outed completely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820996646.3U CN208955229U (en) | 2018-06-27 | 2018-06-27 | A kind of pcb board ground structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820996646.3U CN208955229U (en) | 2018-06-27 | 2018-06-27 | A kind of pcb board ground structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208955229U true CN208955229U (en) | 2019-06-07 |
Family
ID=66731456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820996646.3U Active CN208955229U (en) | 2018-06-27 | 2018-06-27 | A kind of pcb board ground structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208955229U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474176A (en) * | 2019-08-21 | 2019-11-19 | 上海辛格林纳新时达电机有限公司 | The ground connection conduction device and high-voltage power unit of high-voltage power unit |
| CN111065202A (en) * | 2019-12-31 | 2020-04-24 | 广州兴森快捷电路科技有限公司 | Control device and PCBA board assembly structure thereof |
-
2018
- 2018-06-27 CN CN201820996646.3U patent/CN208955229U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474176A (en) * | 2019-08-21 | 2019-11-19 | 上海辛格林纳新时达电机有限公司 | The ground connection conduction device and high-voltage power unit of high-voltage power unit |
| CN110474176B (en) * | 2019-08-21 | 2024-05-14 | 上海辛格林纳新时达电机有限公司 | High-voltage power unit and grounding conduction device thereof |
| CN111065202A (en) * | 2019-12-31 | 2020-04-24 | 广州兴森快捷电路科技有限公司 | Control device and PCBA board assembly structure thereof |
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