CN102195283A - Terminal product and safety protection method thereof - Google Patents
Terminal product and safety protection method thereof Download PDFInfo
- Publication number
- CN102195283A CN102195283A CN2010101184837A CN201010118483A CN102195283A CN 102195283 A CN102195283 A CN 102195283A CN 2010101184837 A CN2010101184837 A CN 2010101184837A CN 201010118483 A CN201010118483 A CN 201010118483A CN 102195283 A CN102195283 A CN 102195283A
- Authority
- CN
- China
- Prior art keywords
- end product
- circuit
- connector
- relay
- dangerous
- 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.)
- Granted
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Keying Circuit Devices (AREA)
Abstract
The embodiment of the invention provides a terminal product and a safety protection method thereof. A danger circuit and a safe circuit of the terminal product are connected through a connector; the connector and the terminal product are simultaneously electrified and interrupted; during electrifying, a contact of the connector is switched on, the danger circuit is connected with the safe circuit, the terminal product normally works; and during interrupting, the contact of the connector is switched off, the danger circuit is isolated from the safe circuit. In the technical scheme of the embodiment of the invention, safe protection of the terminal product is realized by using the principle that the contact of the connector is switched off during the interrupting and adopting a simple and low-cost scheme.
Description
Technical field
The present invention relates to the technical field of end product security protection, particularly a kind of end product and safety protecting method thereof.
Background technology
With reference to the definition of international standard, all be dangerous circuit so long as peak values of ac voltage surpasses the circuit that 42.4V or direct current crest voltage surpass 60V, as end product to go out family line (TNV-3) or do not go out family line circuit such as (TNV-2) be dangerous circuit.In order to improve the security of products energy, need between dangerous circuit and safety circuit, carry out safe isolation, to form basic insulation or the reinforced insulation between dangerous circuit and the safety circuit.But the dangerous circuit of at present a lot of products can not be realized isolating, and human body is had potential potential safety hazard.
A kind of isolation method of dangerous circuit as shown in Figure 1, this scheme can realize the isolation fully to dangerous circuit supply power supply, but, because EMC (Electro Magnetic Compatibility, Electro Magnetic Compatibility) risk is very high, need locate and change plate for a long time, the research and development time lengthening, cost also can continue to increase.Therefore, the mode of a kind of more simple economy of needs realizes the security protection of end product.
Summary of the invention
The embodiment of the invention provides a kind of end product and safety protecting method thereof.
On the one hand, the embodiment of the invention provides a kind of end product, connects by connector between the dangerous circuit of described end product and the safety circuit; Described connector and described end product power on simultaneously and descend; When powering on, the closing of contact of described connector, described dangerous circuit and described safety circuit are connected, described end product operate as normal; In following when electricity, the contact of described connector disconnects, and described dangerous circuit and described safety circuit are isolated,
On the other hand, the embodiment of the invention provides a kind of safety protecting method of end product, and described method comprises: the dangerous circuit of end product is linked to each other by connector with safety circuit; When described end product and described connector powered on simultaneously, described dangerous circuit and described safety circuit were connected in closed self contact of described connector, realize the operate as normal of described end product; When described end product and described connector during with electricity at present, described connector disconnects self contact, and described dangerous circuit and described safety circuit are isolated.
The end product of the embodiment of the invention and safety protecting method thereof increase connector between the dangerous circuit of end product and safety circuit, during electricity, connector contact disconnects, thereby realizes the isolation of dangerous circuit and safety circuit instantly.This technical scheme has been utilized the connector principle that the contact disconnects when outage, and the scheme of employing simple economy has realized the safeguard protection of end product.
Description of drawings
Fig. 1 is the isolation method schematic diagram of a kind of dangerous circuit of prior art;
Fig. 2 is the inside connection diagram of embodiment of the invention end product;
Fig. 3 is the overall flow figure of embodiment of the invention method;
Fig. 4 is the relay operation principle schematic diagram of the embodiment of the invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
The embodiment of the invention provides a kind of end product, and Fig. 2 is the inside connection diagram of embodiment of the invention end product.As shown in Figure 2, connect by connector 22 between the dangerous circuit 20 of the end product of the embodiment of the invention and the safety circuit 21; Connector 22 powers on simultaneously with end product and descends; When powering on, the closing of contact of connector 22, dangerous circuit 20 and safety circuit 21 are connected the end product operate as normal; In following when electricity, the contact of connector 22 disconnects, and dangerous circuit 20 and described safety circuit 21 are isolated.
Alternatively, the connector 22 of present embodiment is a relay, and described contact is the normal opened contact of relay 22.Alternatively, the relay of present embodiment must satisfy the voltage-withstand test requirement of end product, otherwise will reselect the relay that satisfies described requirement.Concrete voltage-withstand test process is: add withstand voltagely between dangerous circuit 20 and safety circuit 21, end product is carried out voltage-withstand test; If voltage-withstand test does not pass through, then need to reselect the relay that is arranged between dangerous circuit 20 and the safety circuit 21.
According to the standard of IEC60950-1, end product can be divided into dangerous circuit and safety circuit (SELV), and safety circuit can be touched by human body, therefore, just need have a basic insulation to isolate between dangerous circuit and safety circuit.This basic insulation can guarantee that dangerous circuit can not go here and there safety circuit part and human body be produced dangerous.
Present embodiment adopts connector to realize this basic insulation, and this connector satisfies: a contact can automatic disconnection when deenergization.This connector can be a relay, or can realize other device of said function.Present embodiment is that example is elaborated with the relay; but what it should be understood by one skilled in the art that is; relay only is a kind of mode of specific implementation, only is used for the embodiment of the invention is described, and and is not used in the claim protection range is limited.
The embodiment of the invention has added a relay between the dangerous circuit of end product and safety circuit, when relay cuts off the power supply, just can realize basic insulation.The end product of the embodiment of the invention and relay power on simultaneously and descend electricity, utilize relay when disconnecting power supply, and the characteristic that normal opened contact disconnects is isolated the dangerous signal of telecommunication when outage, to reach the purpose of protection human body.The end product that has comprised this relay has improved the security of products energy greatly.
The embodiment of the invention also provides a kind of safety protecting method of end product, and Fig. 3 is the overall flow figure of this method, and as shown in Figure 3, this method comprises:
S301, the dangerous circuit of end product is linked to each other by connector with safety circuit;
S302, when described end product and described connector power on simultaneously, described dangerous circuit and described safety circuit are connected in closed self contact of described connector, realize the operate as normal of described end product;
S303, when described end product and described connector during with electricity at present, described connector disconnects self contact, and described dangerous circuit and described safety circuit are isolated.
Alternatively, the connector of present embodiment is a relay, the relay operation principle schematic diagram that Fig. 4 adopts for the embodiment of the invention.The method of the embodiment of the invention breaks through the traditional design technology, seek the source of potential safety hazard, by between the dangerous circuit of end product and safety circuit, connecting relay, the characteristic that normal opened contact disconnects when utilizing the relay outage is isolated dangerous circuit and safety circuit, has realized that effectively the safety of product is isolated.
In the present embodiment, the effect of security protection is checked by voltage-withstand test and isolation distance, that is to say, has passed through voltage-withstand test, and has satisfied the requirement of isolation distance, has just realized security protection.Relay is in the situation of outage, and normal opened contact just in time disconnects, and can pass through voltage-withstand test, and isolation distance has also satisfied requirement.Therefore, by between the dangerous circuit of end product and safety circuit, connecting the security protection that relay has just been realized end product.Usually, relay device requires the safety authentication by IEC/EN60950, otherwise, relay is required to assess again, promptly reselecting one can be by the relay of safety authentication.
Alternatively, the relay of present embodiment is selected in the following ways: when described end product and described relay during with electricity at present, add withstand voltagely between described dangerous circuit and described safety, described end product is carried out voltage-withstand test; If voltage-withstand test does not pass through, then need to reselect the relay that is arranged between dangerous circuit and the safety circuit, with authentication by end product safety certification standard.The purpose of voltage-withstand test is to detect between dangerous circuit and the safety circuit whether can realize basic insulation.As, can be under product under the situation of electricity, between dangerous circuit and safety circuit, add the withstand voltage of 1500Vac, if electric current less than 10mA, the expression basic insulation.
The key point of embodiment of the invention method is, end product when powering on, relay closes, product operate as normal; When end product was electric down, the product voltage-withstand test passed through, and can authenticate by safety.If do not add relay, when product was electric down, the product voltage-withstand test just can not pass through.That just illustrates that product safety has serious problems.Isolate if also add relay when powering on, then dangerous circuit part signal and safety circuit part signal can not transmit, and do not realize product function.The method of the embodiment of the invention has been utilized electrical testing under the product just, and relay contact disconnects, to pass through voltage-withstand test; And product and relay be when powering on, and relay closes makes the characteristics of product operate as normal, realized that product safety isolates the dual requirements of realizing with function.
Above embodiment only in order to the technical scheme of the explanation embodiment of the invention, is not intended to limit; Although the embodiment of the invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the embodiment of the invention.
Claims (6)
1. an end product is characterized in that, connects by connector between the dangerous circuit of described end product and the safety circuit; Described connector and described end product power on simultaneously and descend; When powering on, the closing of contact of described connector, described dangerous circuit and described safety circuit are connected, described end product operate as normal; In following when electricity, the contact of described connector disconnects, and described dangerous circuit and described safety circuit are isolated.
2. end product according to claim 1 is characterized in that, described connector satisfies the voltage-withstand test requirement of described end product.
3. end product according to claim 1 is characterized in that, described connector is a relay, and described contact is the normal opened contact of described relay.
4. the safety protecting method of an end product is characterized in that, described method comprises:
The dangerous circuit of end product is linked to each other by connector with safety circuit;
When described end product and described connector powered on simultaneously, described dangerous circuit and described safety circuit were connected in closed self contact of described connector, realize the operate as normal of described end product;
When described end product and described connector during with electricity at present, described connector disconnects self contact, and described dangerous circuit and described safety circuit are isolated.
5. method according to claim 4 is characterized in that, described connector is a relay, and described contact is the normal opened contact of described relay.
6. method according to claim 5 is characterized in that, described relay is selected in the following ways:
When described end product and described relay during with electricity at present, between described dangerous circuit and described safety circuit, add withstand voltagely, described end product is carried out voltage-withstand test; If do not meet the requirement of voltage-withstand test, then reselect the dangerous circuit that is arranged at described end product and the relay between the safety circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010118483.7A CN102195283B (en) | 2010-03-03 | 2010-03-03 | Terminal product and safety protection method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010118483.7A CN102195283B (en) | 2010-03-03 | 2010-03-03 | Terminal product and safety protection method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102195283A true CN102195283A (en) | 2011-09-21 |
| CN102195283B CN102195283B (en) | 2015-02-25 |
Family
ID=44602865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010118483.7A Active CN102195283B (en) | 2010-03-03 | 2010-03-03 | Terminal product and safety protection method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102195283B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55141922A (en) * | 1979-04-09 | 1980-11-06 | Osmond Max | Safety power supply |
| CN1649228A (en) * | 2005-01-14 | 2005-08-03 | 艾默生网络能源系统有限公司 | Signal lightning protection circuit |
| CN1725796A (en) * | 2004-07-21 | 2006-01-25 | 华为技术有限公司 | Communication system |
| CN101359826A (en) * | 2007-08-03 | 2009-02-04 | 苏州三星电子有限公司 | Novel communication protecting equipment |
-
2010
- 2010-03-03 CN CN201010118483.7A patent/CN102195283B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55141922A (en) * | 1979-04-09 | 1980-11-06 | Osmond Max | Safety power supply |
| CN1725796A (en) * | 2004-07-21 | 2006-01-25 | 华为技术有限公司 | Communication system |
| CN1649228A (en) * | 2005-01-14 | 2005-08-03 | 艾默生网络能源系统有限公司 | Signal lightning protection circuit |
| CN101359826A (en) * | 2007-08-03 | 2009-02-04 | 苏州三星电子有限公司 | Novel communication protecting equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102195283B (en) | 2015-02-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205787014U (en) | A kind of D.C. contactor main contacts testing circuit | |
| CN205427552U (en) | High -voltage switch intelligent control ware | |
| CN204130930U (en) | A kind of remote operation controls movable switching cabinet | |
| CN205246820U (en) | Electric locomotive high voltage insulation detection device with mechanical and electric duplicate protection | |
| CN105259516B (en) | A kind of off-line UPS input switch abnormal detector | |
| CN103515150A (en) | Hybrid relay | |
| CN201060745Y (en) | Isolation type lightning protection switch for electric appliance | |
| CN103872674A (en) | Distribution system and distribution unit | |
| CN202864606U (en) | Elevator electric system safety return circuit | |
| CN102195283B (en) | Terminal product and safety protection method thereof | |
| CN104319810A (en) | Input safety protection circuit of photovoltaic inverter and photovoltaic inverter having safety protection function | |
| CN103426682A (en) | Relay with safety device and relay safety device | |
| CN102684040A (en) | Anti-creeping method and anti-creeping connecting device | |
| CN204069002U (en) | Based on number, the electric simultaneous interpretation device of insulate line remote auto power supply technique | |
| CN103500906A (en) | Remote control type power supply changeover device | |
| CN203616622U (en) | Mine explosion-proof and intrinsically-safe type intelligent alarm vacuum switch | |
| CN206820639U (en) | A kind of high-pressure frequency-conversion auto by pass cabinet | |
| CN204068206U (en) | The control device of steam turbine jumped by a kind of generator connection | |
| CN102436191B (en) | A kind of control method of power control circuit | |
| CN104037740A (en) | Arc fault disconnecting device | |
| CN204554738U (en) | A kind of lamp switch operator guards | |
| CN204008725U (en) | Vacuum circuit breaker debugging termination | |
| CN203895949U (en) | Power supply protection device for electric equipment | |
| CN204046437U (en) | The protective circuit of photovoltaic DC-to-AC converter | |
| CN203385808U (en) | Fault detection apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171109 Address after: Metro Songshan Lake high tech Industrial Development Zone, Guangdong Province, Dongguan City Road 523808 No. 2 South Factory (1) project B2 -5 production workshop Patentee after: HUAWEI terminal (Dongguan) Co., Ltd. Address before: 518129 Longgang District, Guangdong, Bantian HUAWEI base B District, building 2, building No. Patentee before: Huawei Device Co., Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee after: Huawei Device Co., Ltd. Address before: 523808 Southern Factory Building (Phase I) Project B2 Production Plant-5, New Town Avenue, Songshan Lake High-tech Industrial Development Zone, Dongguan City, Guangdong Province Patentee before: HUAWEI terminal (Dongguan) Co., Ltd. |