CN106455466A - Grounding protection device and method of a circuit board - Google Patents
Grounding protection device and method of a circuit board Download PDFInfo
- Publication number
- CN106455466A CN106455466A CN201611229738.0A CN201611229738A CN106455466A CN 106455466 A CN106455466 A CN 106455466A CN 201611229738 A CN201611229738 A CN 201611229738A CN 106455466 A CN106455466 A CN 106455466A
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- CN
- China
- Prior art keywords
- circuit board
- power supply
- protection device
- conducting block
- contact site
- 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.)
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Classifications
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- 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
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0007—Casings
- H05K9/002—Casings with localised screening
- H05K9/0022—Casings with localised screening of components mounted on printed circuit boards [PCB]
- H05K9/0037—Housings with compartments containing a PCB, e.g. partitioning walls
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention relates to the technical field of electrical equipment, in particular to the grounding protection device and method of a circuit board. The circuit board grounding protection device of the invention comprises the conductive block for connecting the cover on the chassis. The position of the conductive block corresponds to the installation position of the power supply. When the upper cover of the box is closed, the conductive block is contacted with the power supply casing, so that the power supply is communicated with the upper cover of the machine case. Through the arrangement of grounding protection device in the power supply, the power supply potential is zero, so as to avoid the formation of magnetic field between the power and the magnetic bar, and to solve the problem of the normal operation of the circuit board affected by the magnetic circuit interference. Therefore, the circuit board can work normally and each functional unit is effective in its function.
Description
Technical field
The present invention relates to technical field of electric equipment, particularly to a kind of circuit board ground protection device and guard method.
Background technology
Circuit board is the important carrier of electronic devices and components, is also to constitute one of important part of electrical equipment, circuit board exists
During use, it is commonly installed and is fixed on cabinet, thus be formed in the space of cabinet closing working.Include many on circuit board
Individual functional unit, each functional unit plays respective function affect, and each functional unit is arranged with numerous electronics units
Device, including resistance, electric capacity, potentiometer, coil etc., and there also is provided power supply in cabinet, circuit board and its be divided into
Each functional unit works in the case of power initiation.
Because electronic component and power supply are arranged in cabinet, all of components and parts are at a distance of relatively near, the transformator in power supply
（It is specially coil）Larger magnetic field can be produced with the bar magnet in circuit, this magnetic field can be done obvious magnetic circuit to the generation of circuit board
Disturbing, thus affecting the effect of each functional unit on circuit board, and leading to the function of whole circuit board to be detracted and reduce.
In prior art, for this problem producing magnetic circuit interference, generally power supply is carried out closure designs, make in power supply
Transformer coil produce physical barrier, thus weakening magnetic circuit interference, particularly when using cylindric power supply, prior art
The two ends of power supply are all closed（It was to improve its heat dispersion in the past, both ends of power was designed as opening form）, this side
Although method can weaken magnetic circuit interference to a certain extent, the problem of magnetic circuit interference still exists.
Content of the invention
It is an object of the invention to：Produce magnetic field for the power supply in circuit board cabinet in prior art with bar magnet, thus
Form stronger magnetic circuit interference, lead to affect the normal problem using of circuit board, provide a kind of circuit board ground protection device and
Guard method, by arranging earth protective device on power supply, makes the potential on power supply be zero, thus avoiding power supply and bar magnet
Between form magnetic field, solve the problems, such as magnetic circuit interference, thus affecting that circuit board is normal to be used, to make circuit board normal work,
Each functional unit all effectively plays its functional effect.
In order to realize foregoing invention purpose, the invention provides technical scheme below：
A kind of circuit board ground protection device, including the conducting block for being connected in chassis cover, the position of this conducting block with
The installation site of power supply corresponds to, and after chassis cover is closed, described conducting block is contacted with outer casing of power supply, so that power supply is led with chassis cover
Logical.
Due to being provided with more electric elements on circuit board, circuit board is arranged in cabinet when using, and this makes electricity
Subcomponent and power supply are arranged in cabinet, and all of components and parts are at a distance of relatively near, the transformator in power supply（It is specially coil）With
Bar magnet in circuit can produce larger magnetic field, and this magnetic field can be disturbed, thus affecting circuit obvious magnetic circuit to the generation of circuit board
The effect of each functional unit on plate, and lead to the function of whole circuit board to be detracted and reduce, in prior art, not
Preferably method solves this technical problem.
This programme passes through to arrange conducting block, when circuit board is in running order, the upper lid meeting of cabinet in chassis cover
Close, after the upper lid of cabinet is closed, conducting block can be contacted with outer casing of power supply, so that outer casing of power supply is turned on cabinet, due to machine
Case itself is provided with grounding device on the outer wall, so that outer casing of power supply liquid is grounded after power supply is connected with cabinet by conducting block,
Potential on outer casing of power supply is zero, thus power supply no longer produces magnetic field with the bar magnet in circuit, solves power supply in prior art
Produce the problem of magnetic circuit interference and bar magnet between, make on circuit board each functional unit play respective performance effect it is ensured that whole
Individual circuit board can work normal, excellently.
Take the mode of conducting block, structure is simple, and conducting ground connection can be automatically obtained, when circuit board is when using, one
Surely casing can be closed, thus realizing automatic and power on purpose.
Preferably, described conducting block includes, for connecting the installation portion in chassis cover, also including and installation portion
Contact site, described installation portion and the contact site integral structure connecting, described contact site is used for and power supply conducting.Conducting block master
Two parts to be included, installation portion and contact site, installation portion is used for installing, is connected to inside chassis cover, and contact site is mainly used in
Turn on power supply, when chassis cover is closed, when circuit board is in running order, due to being grounded so that power supply passes through outside cabinet
The contact site of conducting block is connected with cabinet, is grounded, thus reaching the effect of protection circuit plate.
Preferably, described conducting block is cube, and described contact site is respectively two relative faces with installation portion.By conduction
Block is set to cube structure, facilitates it to be connected with chassis cover, during use, installs knot by opening up on cube structure
Structure, makes conducting block be fixed in chassis cover by mounting structure, during use, by mounting structure by cube structure
Certain one side is arranged on the inner side of chassis cover, and this side is provided with the side of mounting structure for conducting block, when chassis cover closes
When closing, because the position of conducting block is corresponding with position of source, the opposite side of the installed surface of cube structure is fitted with power supply and is connect
Touch, make power ground, potential is zero.
Preferably, described conducting block is cylinder, and described contact site is respectively relative two of this cylinder with installation portion
Bottom surface.Conducting block is set to cylinder, described cylindrical structure includes upper and lower two bottom surfaces and the face of cylinder, during use, will justify
The upper bottom surface of the conducting block of column structure or bottom surface are arranged on the inner side of chassis cover, now, cylindrical axis perpendicular to
The plate face of chassis cover, when chassis cover is closed, because the position of conducting block is corresponding with position of source, cylindrical another
Being fitted with electrical power contacts in bottom surface, makes power ground, and potential is zero.
Preferably, described conducting block is connected for detachable with chassis cover.Installation counterbore is offered on conducting block, right
Ying Di, also offers screwed hole on chassis cover, and attachment screw is passed through installation counterbore and is connected with screwed hole, and conducting block is installed
In chassis cover.
Preferably, described contact site is provided with elastomeric element, this elastomeric element is conductive material.
Power supply is arranged in cabinet, and itself structure is hard structure, and meanwhile, conducting block is similarly that electric conductivity is preferable
Metal material, conducting block to be realized is fitted it is ensured that contact condition is excellent with being fully contacted of power supply, the two contact when necessary
It is in a kind of state of mutual compressing, this can make the infringement of battery pair.
By arranging elastomeric element on contact site, contact site is made to fit with electrical power contacts by elastomeric element, thus having
Effect avoids the danger that power supply is subject to compressing to be damaged.When chassis cover is closed, it is arranged on the bullet on conducting block contact site
Property part first with electrical power contacts, because elastomeric element has certain elasticity it may occur that certain deformation, and power supply will not be sent out
Raw deformation, thus protect power supply.
Preferably, the hollow cylindrical structure that described elastomeric element is curled into for foil, the circle of this cylindrical structure
Cylinder is connected on contact site.
Elastomeric element is set to hollow cylindrical structure, and the face of cylinder is connected on contact site, upper when cabinet
After lid is closed, the face of cylinder of this hollow cylindrical structure and electrical power contacts, deformed upon by hollow-core construction, cylindrical structure becomes
For flat, realize elastomeric element and be fully contacted with power supply, described hollow cylindrical structure is obtained using foil, described gold
Genus thin slice is rectangular configuration, during foil curling, forms hollow cylindrical structure.
Preferably, the quantity of described conducting block is two pieces.The quantity of conducting block is set to two pieces, conducting block can be increased
With the contact area of power supply it is ensured that the contact laminating by two conducting blocks for the power supply, fully realize the connection with cabinet.
Preferably, the quantity of described conducting block is four.The quantity of conducting block is set to four, can increase further and lead
The contact area of electric block and power supply, it is ensured that the contact laminating by two conducting blocks for the power supply, fully realizes the connection with cabinet, and
And when wherein one or two conducting block and electrical power contacts are bad, also other conducting blocks be fully contacted with power supply it is ensured that
Outer casing of power supply dead ground.
Accordingly, present invention also offers a kind of circuit board ground guard method, circuit board ground protection device is connected
In chassis cover, when circuit board uses, power supply is passed through circuit board ground protection device and is turned on cabinet, during this chassis earth,
The potential realizing power supply is zero.
By the way, it is to avoid between power supply and bar magnet, produce magnetic field, thus solve being formed because producing magnetic field
Circuit board is produced with the problem of magnetic circuit interference it is ensured that each functional unit normal work on circuit board and circuit board, play each
From performance effect.Meanwhile, this guard method simple it is not necessary to individually carry out manual operation, when circuit board is in work
During state, the upper lid of cabinet is closed, and now, is automatically performed the connection of power supply and casing, makes the electricity on power supply
Gesture is zero, will not produce magnetic field with bar magnet, thus forming magnetic circuit interference, the normal use of impact circuit board.
Compared with prior art, beneficial effects of the present invention：
1st, pass through to arrange conducting block in chassis cover, when circuit board is in running order, the upper lid of cabinet can be closed, cabinet
Upper lid close after conducting block can contact with outer casing of power supply so that outer casing of power supply is turned on cabinet, due to cabinet in
Grounding device is provided with outer wall, so that outer casing of power supply liquid is grounded after power supply is connected with cabinet by conducting block, outer casing of power supply
On potential be zero, thus power supply no longer produces magnetic field with the bar magnet in circuit, solve in prior art power supply and bar magnet it
Between produce the problem of magnetic circuit interference, make on circuit board each functional unit play respective performance effect it is ensured that whole circuit board
Can work normal, excellently；
2nd, pass through to arrange elastomeric element on contact site, so that contact site is fitted with electrical power contacts by elastomeric element, thus effectively
Avoid the danger that power supply is subject to compressing to be damaged.When chassis cover is closed, it is arranged on the elasticity on conducting block contact site
Part first with electrical power contacts, because elastomeric element has certain elasticity it may occur that certain deformation, and power supply will not occur
Deformation, thus protect power supply；
3rd, by the way, it is to avoid between power supply and bar magnet produce magnetic field, thus solve because produce magnetic field and formed right
Circuit board produces the problem of magnetic circuit interference it is ensured that each functional unit normal work on circuit board and circuit board, plays each
Performance effect.Meanwhile, this guard method simple it is not necessary to individually carry out manual operation, when circuit board is in work shape
During state, the upper lid of cabinet is closed, and now, is automatically performed the connection of power supply and casing, makes the potential on power supply
It is zero, magnetic field will not be produced with bar magnet, thus forming magnetic circuit interference, the normal use of impact circuit board.
Brief description：
Fig. 1 is the structural representation of the circuit board ground protection device of embodiment 1.
Fig. 2 is the structural representation of the circuit board ground protection device of embodiment 2.
Fig. 3 is the structural representation of the conducting block of circuit board ground protection device in embodiment 2.
Fig. 4 is the partial enlarged drawing at A in Fig. 2.
Fig. 5 is the structural representation of the conducting block of circuit board ground protection device in embodiment 3.
Fig. 6 is the structural representation of elastomeric element in the circuit board ground protection device of embodiment 2.
In figure labelling：1- cabinet, 101- chassis cover, 2- conducting block, 21- installation portion, 22- contact site, 23- installing hole,
3- power supply, 4- elastomeric element.
Specific embodiment
With reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
Scope for the above-mentioned theme of the present invention is only limitted to below example, all belongs to this based on the technology that present invention is realized
The scope of invention.
Embodiment 1
The present embodiment is applied to circuit board and is arranged on the occasion in cabinet, circuit board is protected.
As shown in figures 1 and 3, circuit board ground protection device, including for being connected to the conducting block in chassis cover 101
2, the position of this conducting block 2 is corresponding with the installation site of power supply 3, after chassis cover 101 is closed, outside described conducting block 2 and power supply
Shell contacts, and so that power supply 3 is turned on chassis cover 101.
Power supply 3 is arranged on inside cabinet 1, and cabinet 1 includes cabinet bulk and chassis cover 101, and conducting block 2 is connected on cabinet
On the inner surface of lid 101, after chassis cover 101 and casing cover, the conducting block 2 of chassis cover 101 inner side is connect with power supply 3
Touch.
Due to being provided with more electric elements on circuit board, circuit board is arranged in cabinet when using, and this makes electricity
Subcomponent and power supply are arranged in cabinet, and all of components and parts are at a distance of relatively near, the transformator in power supply（It is specially coil）With
Bar magnet in circuit can produce larger magnetic field, and this magnetic field can be disturbed, thus affecting circuit obvious magnetic circuit to the generation of circuit board
The effect of each functional unit on plate, and lead to the function of whole circuit board to be detracted and reduce, in prior art, not
Preferably method solves this technical problem.
This programme passes through to arrange conducting block, when circuit board is in running order, the upper lid meeting of cabinet in chassis cover
Close, after the upper lid of cabinet is closed, conducting block can be contacted with outer casing of power supply, so that outer casing of power supply is turned on cabinet, due to machine
Case itself is provided with grounding device on the outer wall, so that outer casing of power supply liquid is grounded after power supply is connected with cabinet by conducting block,
Potential on outer casing of power supply is zero, thus power supply no longer produces magnetic field with the bar magnet in circuit, solves power supply in prior art
Produce the problem of magnetic circuit interference and bar magnet between, make on circuit board each functional unit play respective performance effect it is ensured that whole
Individual circuit board can work normal, excellently.
Take the mode of conducting block, structure is simple, and conducting ground connection can be automatically obtained, when circuit board is when using, one
Surely casing can be closed, thus realizing automatic and power on purpose.
Conducting block 2 includes, for connecting the installation portion 21 in chassis cover 101, also including connecting with installation portion 21
Contact site 22, described installation portion 21 and contact site 22 are integral type structure, and described contact site 22 is used for and power supply 3 turns on, and leads
Electric block 2 mainly includes two parts, installation portion 21 and contact site 22, and conducting block 2 is additionally provided with installing hole 23, and installation portion 21 passes through peace
Dress hole 23 is installed, is fixed on inside chassis cover 101, and contact site 22 is mainly used in turning on power supply 3, when chassis cover 101 closes
Close, when circuit board is in running order, due to cabinet 1 outside ground connection so that power supply 3 by the contact site of conducting block 2 22 with
Cabinet 1 connects, and is grounded, thus reaching the effect of protection circuit plate.
Conducting block 2 is cube, and described contact site 22 is respectively two relative faces with installation portion 21, conducting block is arranged
For cube structure, facilitate it to be connected with chassis cover, during use, by opening up mounting structure on cube structure, pass through
Mounting structure makes conducting block be fixed in chassis cover, during use, by mounting structure by certain side of cube structure
Face is arranged on the inner side of chassis cover, and this side is provided with the side of mounting structure for conducting block, when chassis cover is closed, by
Corresponding with position of source in the position of conducting block, the opposite side of the installed surface of cube structure is contacted with power supply laminating, makes electricity
Source is grounded, and potential is zero.
Conducting block 2 is connected for detachable with chassis cover 101, offers installation counterbore on conducting block, accordingly,
Screwed hole is also offered on chassis cover, attachment screw is passed through installation counterbore and is connected with screwed hole, and conducting block is arranged on cabinet
In upper lid.
The quantity of conducting block 2 is two pieces, and two pieces conducting block is arranged side by side, when chassis cover covers, and all energy and power supplys
Completely attach to, the quantity of conducting block is set to two pieces, the contact area of conducting block and power supply can be increased it is ensured that power supply passes through
The contact laminating of two conducting blocks, fully realizes the connection with cabinet.
The present embodiment passes through to arrange conducting block, when circuit board is in running order, the upper lid of cabinet in chassis cover
Can close, after the upper lid of cabinet is closed, conducting block can be contacted with outer casing of power supply, so that outer casing of power supply is turned on cabinet, due to
Cabinet itself is provided with grounding device on the outer wall, so that outer casing of power supply liquid connects after power supply is connected with cabinet by conducting block
Ground, the potential on outer casing of power supply is zero, thus power supply no longer produces magnetic field with the bar magnet in circuit, solves electricity in prior art
Produce the problem of magnetic circuit interference between source and bar magnet, make on circuit board each functional unit play respective performance effect it is ensured that
Whole circuit board can work normal, excellently.
Embodiment 2
The present embodiment is applied to circuit board and is arranged on the occasion in cabinet, circuit board is protected.
The circuit board ground protection device of the present embodiment is same as Example 1, and difference is：
As shown in Figure 2, Figure 3 and Figure 4, conducting block 2 includes installation portion 21 and contact site 22, is provided with elastic on contact site 22
Part 4, this elastomeric element is conductive material, and power supply is arranged in cabinet, and itself structure is hard structure, meanwhile, conducting block
It is similarly the preferable metal material of electric conductivity, conducting block to be realized is fitted it is ensured that contact condition is excellent with being fully contacted of power supply
Good, the two necessarily be in a kind of state of mutual compressing in contact, and this can make the infringement of battery pair.
By arranging elastomeric element on contact site, contact site is made to fit with electrical power contacts by elastomeric element, thus having
Effect avoids the danger that power supply is subject to compressing to be damaged.When chassis cover is closed, it is arranged on the bullet on conducting block contact site
Property part first with electrical power contacts, because elastomeric element has certain elasticity it may occur that certain deformation, and power supply will not be sent out
Raw deformation, thus protect power supply.
As shown in fig. 6, the hollow cylindrical structure that elastomeric element 4 is curled into for foil, the circle of this cylindrical structure
Cylinder is connected on contact site, and elastomeric element is set to hollow cylindrical structure, and the face of cylinder is connected on contact site,
After the upper lid of cabinet is closed, the face of cylinder of this hollow cylindrical structure and electrical power contacts, deformed upon by hollow-core construction, circle
Column structure is changed into flat, realizes elastomeric element and is fully contacted with power supply, described hollow cylindrical structure adopts foil
Obtain, described foil is rectangular configuration, during foil curling, form hollow cylindrical structure.
The quantity of conducting block 2 is four, the quantity of conducting block is set to four, can increase conducting block and power supply further
Contact area it is ensured that power supply, by the contact of two conducting blocks laminating, fully realizes the connection with cabinet, and ought wherein one
When individual or two conducting blocks are bad with electrical power contacts, also other conducting blocks are fully contacted with power supply it is ensured that outer casing of power supply is complete
Full ground connection.
Embodiment 3
The present embodiment is applied to circuit board and is arranged on the occasion in cabinet, circuit board is protected.
The circuit board ground protection device of the present embodiment is same as Example 1, and difference is：
As shown in figure 5, conducting block 2 is cylinder, described contact site 22 is respectively relative two of this cylinder with installation portion 21
Bottom surface, conducting block is set to cylinder, and described cylindrical structure includes upper and lower two bottom surfaces and the face of cylinder, during use, will justify
The upper bottom surface of the conducting block of column structure or bottom surface are arranged on the inner side of chassis cover, now, cylindrical axis perpendicular to
The plate face of chassis cover, when chassis cover is closed, because the position of conducting block is corresponding with position of source, cylindrical another
Being fitted with electrical power contacts in bottom surface, makes power ground, and potential is zero.
Embodiment 4
The present embodiment is applied to the occasion that circuit board is protected.
Circuit board ground guard method, the circuit board ground protection device as embodiment 1 or enforcement 2 is connected on cabinet
In lid, when circuit board uses, power supply is passed through circuit board ground protection device and is turned on cabinet, during this chassis earth, realizes power supply
Potential be zero.
By the way, it is to avoid between power supply and bar magnet, produce magnetic field, thus solve being formed because producing magnetic field
Circuit board is produced with the problem of magnetic circuit interference it is ensured that each functional unit normal work on circuit board and circuit board, play each
From performance effect.Meanwhile, this guard method simple it is not necessary to individually carry out manual operation, when circuit board is in work
During state, the upper lid of cabinet is closed, and now, is automatically performed the connection of power supply and casing, makes the electricity on power supply
Gesture is zero, will not produce magnetic field with bar magnet, thus forming magnetic circuit interference, the normal use of impact circuit board.
Claims (10)
1. it is characterised in that including the conducting block for being connected in chassis cover, this leads a kind of circuit board ground protection device
The position of electric block is corresponding with the installation site of power supply, and after chassis cover is closed, described conducting block is contacted with outer casing of power supply, makes power supply
With chassis cover conducting.
2. circuit board ground protection device as claimed in claim 1 is it is characterised in that described conducting block is included for being connected
It is connected on the installation portion in chassis cover, also include contact site, described installation portion and the contact site integral type connecting with installation portion
Structure, described contact site is used for and power supply conducting.
3. circuit board ground protection device as claimed in claim 2 is it is characterised in that described contact site and installation portion are respectively
Two relative faces.
4. circuit board ground protection device as claimed in claim 2 is it is characterised in that described conducting block is cylinder, described
Contact site is respectively two relative bottom surfaces of this cylinder with installation portion.
5. the circuit board ground protection device as described in claim 3 or 4 is it is characterised in that described conducting block and chassis cover
Connect for detachable.
6. circuit board ground protection device as claimed in claim 5 is it is characterised in that be provided with elastic on described contact site
Part, this elastomeric element is conductive material.
7. circuit board ground protection device as claimed in claim 6 is it is characterised in that described elastomeric element is rolled up for foil
The hollow cylindrical structure of bent one-tenth, the face of cylinder of this cylindrical structure is connected on contact site.
8. circuit board ground protection device as claimed in claim 5 is it is characterised in that the quantity of described conducting block is two pieces.
9. circuit board ground protection device as claimed in claim 5 is it is characterised in that the quantity of described conducting block is four.
10. a kind of circuit board ground guard method is it is characterised in that by the circuit board ground as described in one of claim 6-9
Protection device is connected in chassis cover, and when circuit board uses, power supply is passed through circuit board ground protection device and turned on cabinet, should
During chassis earth, the potential realizing power supply is zero.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611229738.0A CN106455466B (en) | 2016-12-27 | 2016-12-27 | Circuit board grounding protection device and protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611229738.0A CN106455466B (en) | 2016-12-27 | 2016-12-27 | Circuit board grounding protection device and protection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106455466A true CN106455466A (en) | 2017-02-22 |
| CN106455466B CN106455466B (en) | 2023-05-09 |
Family
ID=58215420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611229738.0A Active CN106455466B (en) | 2016-12-27 | 2016-12-27 | Circuit board grounding protection device and protection method |
Country Status (1)
| Country | Link |
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| CN (1) | CN106455466B (en) |
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| Publication number | Publication date |
|---|---|
| CN106455466B (en) | 2023-05-09 |
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