CN102487586A - Electronic device - Google Patents
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- CN102487586A CN102487586A CN2010105768086A CN201010576808A CN102487586A CN 102487586 A CN102487586 A CN 102487586A CN 2010105768086 A CN2010105768086 A CN 2010105768086A CN 201010576808 A CN201010576808 A CN 201010576808A CN 102487586 A CN102487586 A CN 102487586A
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- high frequency
- circuit board
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Abstract
An electronic device at least comprises: a chassis, a circuit board and an electronic component possessing high frequency conductivity. The circuit board possesses a first part and a second part. The first part is electrically connected with the chassis. The second part is electrically connected with a grounding terminal. The electronic component possessing the high frequency conductivity forms bridge connection between the first part and the second part of the circuit board. There is no other electrical connection between the first part and the second part except the electrical connection established by the electronic component possessing the high frequency conductivity. By using the electronic device of the invention, a user can not generate a feeling of electric shock when touching the chassis.
Description
Technical field
The present invention relates to a kind of electronic installation, and be particularly related to a kind of electronic installation that prevents on leakage current adverse current to the housing.
Background technology
Figure 1A is the sketch map of traditional electronic installation.Please refer to Figure 1A, electronic installation 100a comprises metal shell 110, motherboard 120 and power line 130.Motherboard 120 is positioned at metal shell 110, and electrically connects with metal shell 110.Power line 130 connects motherboard 120, in order to transmit electric energy on motherboard 120.
In general; Power line 130 can have earth terminal GN usually, and the earth terminal of motherboard 120 can electrically connect with the earth terminal GN of power line 130, thus; When motherboard 120 produced leakage current Ic, leakage current Ic just can flow to the earth through the earth terminal GN of power line 130 and be released.
Yet power line 130 is when assigning in socket, if the earth terminal GN of power line 130 and unearthed; Then leakage current Ic just can't obtain discharging and can adverse current return on the motherboard 120; At this moment, because motherboard 120 and metal shell 110 electric connections, so leakage current Ic just can flow on the metal shell 110; Thus, the user just can produce the sensation of electric shock when touching metal shell 110.
Figure 1B is the sketch map of traditional another electronic installation.Please refer to Figure 1B, in order to improve the issuable problem of aforementioned electronic 100a, electronic installation 100b has also comprised insulating material 140, and wherein insulating material 140 is between motherboard 120 and metal shell 110.Thus, when leakage current Ic returns motherboard 120 as if adverse current, be electrically insulated because motherboard 120 has been insulated 140 of materials with metal shell 110, so leakage current Ic just can't flow on the metal shell 110.Yet, the problem that may leak electricity in the motherboard 120 and the place at metal shell 110 on-plane surface places, or motherboard can produce electrification by induction with metal shell when too short apart, thus have influence on electrical performance.
In addition, the sensation for fear of the user gets an electric shock also can insulating material be coated with on the completely whole metal shell 110, yet this measure will cause the increase of cost of manufacture, and the whole texture that reduces metal shell 110.
Summary of the invention
The present invention provides a kind of electronic installation, and it can the person of avoiding the use of produce the sensation of getting an electric shock when the touching casing.
The present invention proposes a kind of electronic installation, and it comprises the electronic component of casing, circuit board and tool high frequency conduction at least.Circuit board has first and second portion, and wherein first and casing electrically connect, and second portion is electrically connected at earth terminal.The electronic component cross-over connection of tool high frequency conduction is between the first and second portion of circuit board.Do not have the electric connection of setting up except that the electronic component of tool high frequency conduction between first and the second portion and electrically connect.
In one embodiment of this invention, the electronic component of tool high frequency conduction is electric capacity, transient voltage suppresser, surge suppressor or surge absorber.
In one embodiment of this invention, when ac signal was passed to the electronic component of tool high frequency conduction, the electronic component of tool high frequency conduction was a short-circuit condition, to let ac signal pass through the electronic component of tool high frequency conduction.
In one embodiment of this invention, when dc signal was passed to the electronic component of tool high frequency conduction, the electronic component of tool high frequency conduction was an open-circuit condition, so that dc signal can't be through the electronic component of tool high frequency conduction.
In one embodiment of this invention, casing is a metal chassis.
In one embodiment of this invention, circuit board comprises first sub-circuit board and second sub-circuit board, wherein first sub-circuit board and the second sub-circuit board entity separation, and first sub-circuit board is first, and second sub-circuit board is a second portion.
In one embodiment of this invention, electronic installation is a notebook computer.
Based on above-mentioned; Electronic installation of the present invention through with the electronic component cross-over connection of tool high frequency conduction between the first and second portion of circuit board; Wherein first electrically is not connected with second portion; And the electronic component of tool high frequency conduction can be in order to absorb or the filtering dc signal, when the leakage current adverse current that so can avoid belonging to dc signal is returned circuit board and flow on the casing, produces the chance of getting an electric shock when the user touches casing thereby reduce.In addition; Because the electronic component of tool high frequency conduction can be in order to let ac signal pass through; Therefore the electrostatic charge that belongs to ac signal on the casing just can be passed on the second portion through the electronic component of first and tool high frequency conduction, successfully electrostatic charge is derived via the earth terminal of casing.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and conjunction with figs. elaborates as follows.
Description of drawings
Figure 1A is the sketch map of traditional electronic installation;
Figure 1B is the sketch map of traditional another electronic installation;
Fig. 2 is the partial cutaway diagrammatic sketch of the electronic installation of one embodiment of the invention;
Fig. 3 is the partial top view of electronic component arrangements on circuit board of the tool high frequency conduction of Fig. 2;
Fig. 4 is the partial cutaway diagrammatic sketch of the electronic installation of another embodiment of the present invention.
Embodiment
In general, when adopting metal, receive the inner leakage current adverse current of externalities or electronic installation easily and return the influence of housing, and make the too much electrostatic charge of accumulation on the surface of shell as the housing of electronic installation (as: notebook computer).Thus, when the user touched housing using electronic installation, the too much electrostatic charge of accumulation just can flow to the user and discharges on the housing, and causes the user to produce the sensation of electric shock.Yet; The electrostatic charge that is distributed in surface of shell is generally ac signal; And the inner leakage current of electronic installation is generally dc signal; Therefore to this characteristic, present embodiment can be through making the electronic component of apparatus high frequency conduction, and wherein ac signal can be through the electronic component of this tool high frequency conduction; Dc signal then can be absorbed or filtering by the electronic component of this tool high frequency conduction; Just the leakage current adverse current that can avoid thus belonging to dc signal is returned on the housing, thereby or can suitably discharge the electrostatic charge that belongs to ac signal on the housing and can the person of avoiding the use of when the contact housing, produce the sensation of getting an electric shock, below will specify the structure of present embodiment and make flowing mode.
Fig. 2 is the partial cutaway diagrammatic sketch of the electronic installation of one embodiment of the invention; And Fig. 3 is the partial top view of electronic component arrangements on circuit board of the tool high frequency conduction of Fig. 2; Wherein the electronic installation of present embodiment is as giving an example with notebook computer; But be not limited thereto, it can also be other possible electronic installation.Please refer to Fig. 2, the electronic installation 200 of present embodiment comprises the electronic component 230 of casing 210, circuit board 220 and tool high frequency conduction at least.In the present embodiment, casing 210 is to adopt metal chassis, and its material for example is the slim and graceful almag of quality or other texture metal material good and with low cost, and at this, the present invention is not particularly limited the material of casing.
In addition, the circuit board 220 that is positioned at electronic installation 200 has first 222 and second portion 224, and wherein first 222 electrically connects with casing 210, and second portion 224 is electrically connected at earth terminal GN, and is as shown in Figure 2.In general; Circuit board 220 is when electronic installation 200 is used or electronic installation 200 is when being in the state of standby; Usually can produce leakage current Ic on the circuit board 220, be electrically connected on the earth terminal GN of power line 240 and this leakage current Ic can be directed to second portion 224 usually, to discharge; Wherein if during the earth terminal GN ground connection of this power line 240, then this leakage current Ic just can flow to the earth and be released.Otherwise if the earth terminal of this power line 240 is when unearthed, and then this leakage current Ic just can adverse current return on the circuit board 220.In addition, if leakage current Ic adverse current returns circuit board 220, and if circuit board 220 itself just can cause aforesaid user to produce the sensation of electric shock when electrically connecting with casing 210.
Therefore; The second portion 224 that present embodiment is earlier divided into circuit board 220 first 222 that electrically connects with casing 210 and electrically connected with the earth terminal GN of power line 240; Wherein first 222 electrically is not connected with second portion 224; When the leakage current Ic adverse current that so just can avoid belonging to dc signal is earlier returned circuit board 220 and flow on the casing 210, thereby produce the problem of getting an electric shock when causing the user to touch.In addition; Accumulate too much electrostatic charge in order to avoid casing 210 to receive external action simultaneously; And cause the user when touching casing 210, still can produce the possibility of electric shock; Therefore present embodiment is just through making the electronic component 230 of apparatus high frequency conduction; Make the electrostatic charge that belongs to ac signal on the casing 210 be able to be released on the circuit board 220, and adverse current is returned the leakage current Ic of circuit board 220 and can't be flow on the casing 210, the electronic component 230 that below will specify tool high frequency conduction is used for the start mechanism of the electronic installation 200 of present embodiment.
Please continue with reference to figure 2 and Fig. 3, electronic component 230 cross-over connections of tool high frequency conduction are between the first 222 and second portion 224 of circuit board 220.In the present embodiment; The electronic component 230 of tool high frequency conduction for example is to adopt electric capacity, transient voltage suppresser, surge suppressor or surge absorber; The electronic component 230 of high frequency conduction of wherein having can make ac signal pass through wherein; And can absorb or the filtering dc signal simultaneously, in other words, there is not electric connection the electric connection of being set up except that the electronic component 230 of tool high frequency conduction between first 222 and the second portion 224.
In detail; When the electrostatic charge on the casing 210 (as: ac signal) is passed to the electronic component 230 of tool high frequency conduction through the first 222 with its electric connection; The electronic component of tool high frequency conduction is a short-circuit condition; Therefore ac signal just can be through the electronic component 230 of tool high frequency conduction, and thus, the electrostatic charge on the casing 210 just can be transmitted on the second portion 224 through the electronic component 230 of tool high frequency conduction.That is be that for ac signal (as: electrostatic charge on the casing 210), first 222 is the states that present electric connection (electrically conducting) with second portion 224.Know that based on above-mentioned the characteristic of the electronic component 230 that present embodiment can be through tool high frequency conduction makes the electrostatic charge on the casing 210 be able to be released on the circuit board 220, thereby person capable of reducing using produces the chance of getting an electric shock when touching casing 210.
Otherwise; When the earth terminal of power line 240 unearthed and cause leakage current Ic (as: dc signal) adverse current to return on the second portion 224 of circuit board 220 and when being passed to the electronic component 230 of tool high frequency conduction; The electronic component of tool high frequency conduction is an open-circuit condition; Therefore dc signal is absorbed or filtering by the electronic component 230 of tool high frequency conduction; Thus, the leakage current Ic that adverse current is returned on the second portion 224 of circuit board 220 just can't transmit in the first 222 through the electronic component 230 of tool high frequency conduction, that is is; For dc signal (leakage current), first 222 is to appear electrically not to be connected (open-circuit condition) with second portion 224.Therefore; Electronic component 230 cross-over connections of tool high frequency conduction are between the first 222 and second portion 224 of circuit board 220; Just in the time of can avoiding leakage current Ic adverse current to return circuit board 220, and flow on the casing 210, when touching casing 210, produce the chance of getting an electric shock thereby reduce the user.
In the present embodiment; Above-mentioned circuit board 220 can be to include the first sub-circuit board B1 and the second sub-circuit board B2; The wherein first sub-circuit board B1 and the second sub-circuit board B2 entity separation; And the first sub-circuit board B1 is a first 222, and the second sub-circuit board B2 is a second portion 224, like Fig. 2 and shown in Figure 3.That is to say that circuit board 220 can be to adopt two sub-circuit plate B 1, B2 to be used for representing respectively aforesaid first 222 and second portion 224.Implement in the kenel at another, the first above-mentioned sub-circuit board B 1 can also be that entity is connected with the second sub-circuit board B2, electronic installation 200 ' as shown in Figure 4.In electronic installation 200 '; The first sub-circuit board B1 and the second sub-circuit board B2 belong to same circuit board; Wherein has an insulator 250 between the first sub-circuit board B1 and the second sub-circuit board B2, so that the first sub-circuit board B1 does not directly contact with the second sub-circuit board B2.
In sum, electronic installation of the present invention has advantage and characteristics at least.At first; The second portion that circuit board area is divided into the first that electrically connects with casing and electrically connects with the earth terminal of power line; And with the electronic component cross-over connection of tool high frequency conduction between the first and second portion of circuit board, do not have the electric connection of wherein setting up except that the electronic component of tool high frequency conduction between first and the second portion and electrically connect.In other words; Electronic component through tool high frequency conduction can be in order to the characteristic of absorption or filtering dc signal; When the leakage current adverse current that just can avoid belonging to dc signal is returned circuit board and flow on the casing, when touching casing, the user produces the chance of getting an electric shock thereby reduce.In addition; Because the electronic component of tool high frequency conduction can be in order to let ac signal pass through; Therefore the electrostatic charge that belongs to ac signal on the casing just can be passed on the second portion through the electronic component of first and tool high frequency conduction, successfully electrostatic charge is derived via the earth terminal of casing.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Those of ordinary skills are not breaking away from the spirit and scope of the present invention, when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking claims person of defining.
Claims (7)
1. an electronic installation is characterized in that, above-mentioned electronic installation comprises at least:
Casing;
Circuit board has first and second portion, and above-mentioned first and said machine casing electrically connect, and above-mentioned second portion is electrically connected at earth terminal; And
The electronic component of tool high frequency conduction, cross-over connection between the above-mentioned first and above-mentioned second portion of foregoing circuit plate,
Do not have the electric connection of setting up except that the electronic component of above-mentioned tool high frequency conduction between wherein above-mentioned first and the above-mentioned second portion and electrically connect.
2. electronic installation according to claim 1 is characterized in that, the electronic component of above-mentioned tool high frequency conduction is electric capacity, transient voltage suppresser, surge suppressor or surge absorber.
3. electronic installation according to claim 1; It is characterized in that; When ac signal was passed to the electronic component of above-mentioned tool high frequency conduction, the electronic component of above-mentioned tool high frequency conduction was a short-circuit condition, to let the electronic component of above-mentioned ac signal through above-mentioned tool high frequency conduction.
4. electronic installation according to claim 1; It is characterized in that; When dc signal was passed to the electronic component of above-mentioned tool high frequency conduction, the electronic component of above-mentioned tool high frequency conduction was an open-circuit condition, so that above-mentioned dc signal can't be through the electronic component of above-mentioned tool high frequency conduction.
5. electronic installation according to claim 1 is characterized in that, said machine casing is a metal chassis.
6. electronic installation according to claim 1; It is characterized in that; The foregoing circuit plate comprises first sub-circuit board and second sub-circuit board; Wherein above-mentioned first sub-circuit board and the above-mentioned second sub-circuit board entity separation, and above-mentioned first sub-circuit board is above-mentioned first, and above-mentioned second sub-circuit board is above-mentioned second portion.
7. electronic installation according to claim 1 is characterized in that, above-mentioned electronic installation is a notebook computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105768086A CN102487586A (en) | 2010-12-01 | 2010-12-01 | Electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105768086A CN102487586A (en) | 2010-12-01 | 2010-12-01 | Electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102487586A true CN102487586A (en) | 2012-06-06 |
Family
ID=46153029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105768086A Pending CN102487586A (en) | 2010-12-01 | 2010-12-01 | Electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102487586A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826901Y (en) * | 2005-09-30 | 2006-10-11 | 华为技术有限公司 | Antistatic apparatus of circuit board |
| CN101183880A (en) * | 2006-11-16 | 2008-05-21 | Lg电子株式会社 | Mobile terminal |
| US7449892B2 (en) * | 2006-06-02 | 2008-11-11 | Cal-Tek 2000, Inc. | Stray voltage detecting |
-
2010
- 2010-12-01 CN CN2010105768086A patent/CN102487586A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2826901Y (en) * | 2005-09-30 | 2006-10-11 | 华为技术有限公司 | Antistatic apparatus of circuit board |
| US7449892B2 (en) * | 2006-06-02 | 2008-11-11 | Cal-Tek 2000, Inc. | Stray voltage detecting |
| CN101183880A (en) * | 2006-11-16 | 2008-05-21 | Lg电子株式会社 | Mobile terminal |
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Application publication date: 20120606 |