CN103594873B - Plug detection circuit - Google Patents
Plug detection circuit Download PDFInfo
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- CN103594873B CN103594873B CN201210293531.5A CN201210293531A CN103594873B CN 103594873 B CN103594873 B CN 103594873B CN 201210293531 A CN201210293531 A CN 201210293531A CN 103594873 B CN103594873 B CN 103594873B
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- adapter
- detection circuit
- trigger element
- shell fragment
- plug detection
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Abstract
The present invention provides a kind of plug detection circuit, it includes adapter, provides power circuit and the signal trigger element of driving voltage for this adapter, this adapter is for the plug grafting for an external device, described adapter includes shell fragment, described signal trigger element is electrically connected between shell fragment and power circuit, when external device is plugged in adapter, shell fragment is in ground state, and described signal trigger element triggers a control signal to enable power circuit；When external device is not plugged in adapter, shell fragment is in unearthed state, and described signal trigger element triggers a control signal not enable power circuit.Described plug detection circuit can be when being plugged in adapter without external device, and controlling power circuit does not provides driving voltage for adapter, to avoid adapter to consume electric energy when zero load.
Description
Technical field
The present invention relates to a kind of electrical connectivity circuit for detecting, particularly relate to a kind of detect the plug detection circuit whether plug is plugged on adapter.
Background technology
Electronic product mostly arranges different types of adapter, for for external device grafting.Such as, (the Universal Serial of the USB (universal serial bus) on notebook computer
Bus, USB) adapter is for for a USB plug grafting.But, this USB connector is when not using (without USB device grafting), and the power circuit within electronic product powers still can to this USB connector.It is demonstrated experimentally that when USB connector zero load, the power of about 0.8 watt still can be consumed, causes energy waste.
Summary of the invention
In view of the above circumstances, it is necessary to a kind of plug detection circuit saving the energy is provided.
A kind of plug detection circuit, it includes adapter, provides power circuit and the signal trigger element of driving voltage for this adapter, this adapter is for the plug grafting for an external device, described adapter includes shell fragment, described signal trigger element is electrically connected between shell fragment and power circuit, when external device is plugged in adapter, shell fragment is in ground state, and described signal trigger element triggers a control signal to enable power circuit；When external device is not plugged in adapter, shell fragment is in unearthed state, and described signal trigger element triggers a control signal not enable power circuit.
Above-mentioned plug detection circuit is by arranging shell fragment on the connectors, and whether has external device grafting by the ground state detecting of shell fragment.Meanwhile, the signal trigger element of this plug detection circuit and shell fragment are electrically connected with, with when shell fragment is in ground connection and earth-free state to power circuit Trig control signal, and then control power circuit and enable or do not enable.This plug detection circuit can be when being plugged in adapter without external device, and controlling power circuit does not provides driving voltage for adapter, to avoid adapter to consume electric energy when zero load.
Accompanying drawing explanation
Fig. 1 is adapter and the axonometric chart of an external device of the plug detection circuit of better embodiment of the present invention；
Fig. 2 is the axonometric chart of the adapter shown in Fig. 1 and another visual angle of axonometric chart of external device；
Fig. 3 is the generalized section after the adapter shown in Fig. 1 assembles with external device；
Fig. 4 is the circuit diagram of the plug detection circuit of better embodiment of the present invention.
Main element symbol description
| Plug detection circuit | 100 |
| Adapter | 10 |
| Metal body | 12 |
| Opening | 122 |
| Gap | 124 |
| Insulating trip | 14 |
| Shell fragment | 16 |
| Free end | 162 |
| Fixing end | 164 |
| Grounding pin | GND |
| Power pins | VBUS |
| First data terminal | D- |
| Second data terminal | D+ |
| Signal trigger element | 30 |
| Power pins | V |
| Grounding pin | G |
| Input pin | A |
| Output pin | Y |
| First inductance | L1 |
| Second inductance | L2 |
| Resistance | R |
| Power supply | VCC |
| Power circuit | 50 |
| External device | 200 |
| Metallic plug | 220 |
Following detailed description of the invention will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Detailed description of the invention
Referring to Fig. 1 and Fig. 4, the present invention provides a kind of plug detection circuit 100, and it is applied in the electronic equipment (not shown) such as host computer, router.This plug detection circuit 100 includes adapter 10, signal trigger element 30 and power circuit 50, and this adapter 10, signal trigger element 30 and power circuit 50 are electrically connected with successively.Whether this plug detection circuit 100 has external device 200 to be plugged in adapter 10 for detecting, and controls whether power circuit 50 provides driving voltage to adapter 10 with this.
This adapter 10 can be USB connector, PS2(Personal System
2) adapter etc..In the present embodiment, this adapter 10 is USB2.0 adapter.Corresponding, this external device 200 can be USB device, PS2 device etc..In the present embodiment, this external device 200 is USB2.0 device, and it includes a metallic plug 220.
Incorporated by reference to refering to Fig. 2 and Fig. 3, this adapter 10 is arranged in the mainboard (not shown) of electronic equipment, and this adapter 10 includes metal body 12, insulating trip 14 and shell fragment 16.This metal body 12 is electrically connected with the system earth portion (not shown) on mainboard, and the cuboid of this metal body 12 substantially one both ends open, its one end arranges an opening 122, for external device 200 grafting.This insulating trip 14 is arranged at one end of metal body 12 opposed open 122, substantially to close another opening of this metal body 12.This shell fragment 16 is made up of metal material, in the present embodiment, this shell fragment 16 in " L " type, it includes free end 162 and the fixing end 164 of connection substantially vertical with free end 162.This free end 162 through insulating trip 14 and is placed in the space that metal body 12 surrounds, and and formation one gap 124, roof interval of metal body 12, the size in this gap 124 makes when external device 200 inserts adapter 10, one sidewall of the metallic plug 220 of external device 200 is just placed in gap 124, and support free end 162 and metal body 12, so that free end 162 is electrically connected with the system earth portion on mainboard by this metallic plug 220, metal body 12 simultaneously.This fixing end 164 is through insulating trip 14, and substantially fits with insulating trip 14, with fixation spring tab 16.
Referring back to Fig. 4, this adapter 10 farther includes power pins VBUS, grounding pin GND, the first data terminal D-, the second data terminal D+.This power pins VBUS is electrically connected with power circuit 50 by one first inductance L1, to obtain driving voltage.This grounding pin GND is electrically connected with the system earth portion on mainboard by one second inductance L2, and this first data terminal D-and the second data terminal D+ are all electrically connected with (not shown) with mainboard.
Whether this signal trigger element 30 has external device 200 to be plugged in adapter 10 for detecting, and exports corresponding control signal according to detecting result.In the present embodiment, this signal trigger element 30 is a phase inverter, and it includes power pins V, grounding pin G, input pin A and output pin Y.This power pins V is electrically connected with the power supply VCC being located on mainboard, this grounding pin G ground connection.This input pin A is electrically connected with the fixing end 164 of shell fragment 16, is electrically connected with by a resistance R and power supply VCC simultaneously.So, when the free end 162 of shell fragment 16 is not electrically connected with the system earth portion on mainboard, this input pin A input high level signal；When the free end 162 of shell fragment 16 is electrically connected with the system earth portion on mainboard, this input pin A input low level signal.This output pin Y is electrically connected with power circuit 50, when input pin A input high level signal, and the control signal of this output pin Y output low level；When input pin A input low level signal, the control signal of this output pin Y output high level.
It is appreciated that this input pin A also can be electrically connected with the free end 162 of shell fragment 16.
This power circuit 50, for enabling after receiving the control signal of high level, thinks that adapter 10 provides driving voltage；It is simultaneously used for after receiving low level control signal not enabling, provides driving voltage with stopping for adapter 10.
The operation principle of this plug detection circuit 100 it is further illustrated by: first below in conjunction with Fig. 3 and Fig. 4, when the metallic plug 220 of external device 200 is not plugged in adapter 10, due to shell fragment 16 free end 162 with keep described gap 124 with metal body 12, therefore this shell fragment 16 is in unearthed state.Now the input pin A of signal trigger element 30 receives high level signal, the control signal of output pin Y-direction power circuit 50 output low level, does not enables controlling power circuit 50, forbids that power circuit 50 provides driving voltage for adapter 10.So, adapter 10 can be effectively prevented from and consume electric energy when zero load.
When the metallic plug 220 of external device 200 is plugged in adapter 10, this metallic plug 220 is placed in gap 124, and supports free end 162 and metal body 12 simultaneously.So this shell fragment 16 is electrically connected with the system earth portion on mainboard by metallic plug 220, metal body 12, to be in ground state.Now the input pin A of signal trigger element 30 receives low level signal, and output pin Y-direction power circuit 50 exports the control signal of high level, enables controlling power circuit 50, and then provides driving voltage for adapter 10.So, this external device 200 can be communicated with mainboard foundation by this adapter 10.
The plug detection circuit 100 of the present invention is by arranging shell fragment 16 on adapter 10, and whether has external device 200 grafting by the ground state detecting of shell fragment 16.Meanwhile, the signal trigger element 30 of this plug detection circuit 100 is electrically connected with shell fragment 16, with when shell fragment 16 is in ground connection and earth-free state respectively to power circuit 50 Trig control signal, and then control power circuit 50 enable or do not enable.When being plugged in adapter 10 without external device 200, this plug detection circuit 100 can forbid that power circuit 50 provides driving voltage for adapter 10, to avoid adapter 10 to consume electric energy when zero load.
Claims (10)
1. a plug detection circuit, it includes adapter and provides the power circuit of driving voltage for this adapter, this adapter is for the plug grafting for an external device, it is characterized in that: described adapter includes shell fragment, described plug detection circuit also includes the signal trigger element being electrically connected between shell fragment and power circuit, this signal trigger element includes input pin, output pin, and wherein this input pin is electrical connected with shell fragment, simultaneously by a resistance
Being electrically connected with a power supply, this output pin is electrically connected with this power circuit, and when external device is plugged in adapter, shell fragment is in ground state, and described signal trigger element triggers a control signal to enable power circuit；When external device is not plugged in adapter, shell fragment is in unearthed state, and described signal trigger element triggers another control signal not enable power circuit.
2. plug detection circuit as claimed in claim 1, it is characterized in that: described adapter is arranged on the mainboard of an electronic equipment, described adapter includes metal body, and described metal body passes through mainboard ground connection, described shell fragment is arranged on metal body, and and formation one gap, metal body interval.
3. plug detection circuit as claimed in claim 2, it is characterised in that: described metal body is the cuboid of a both ends open, and its one end arranges an opening, and described adapter also includes that insulating trip, described insulating trip are arranged at one end of metal body opposed open.
4. plug detection circuit as claimed in claim 3, it is characterised in that: described shell fragment includes free end and fixing end, and described free end is arranged in metal body, and keeps described gap with a roof of metal body, and described fixing end is through insulating trip.
5. plug detection circuit as claimed in claim 4, it is characterized in that: when described external device is plugged in adapter, described external device part is placed in gap, and supports free end and metal body simultaneously so that free end is in ground state by this external device and metal body.
6. plug detection circuit as claimed in claim 1, it is characterised in that: described adapter includes that power pins, described power circuit provide driving voltage by this power pins for adapter.
7. plug detection circuit as claimed in claim 1, it is characterised in that: when shell fragment is in unearthed state, the input pin input high level signal of this signal trigger element；When shell fragment is in ground state, the input pin input low level signal of this signal trigger element.
8. plug detection circuit as claimed in claim 7, it is characterised in that: when the input pin input high level signal of signal trigger element, the control signal of the output pin output low level of this signal trigger element；When the input pin input low level signal of signal trigger element, the control signal of the output pin output high level of this signal trigger element.
9. plug detection circuit as claimed in claim 8, it is characterised in that: described signal trigger element is phase inverter.
10. plug detection circuit as claimed in claim 8, it is characterised in that: described power circuit, for enabling after receiving the control signal of high level, thinks that adapter provides driving voltage；It is simultaneously used for after receiving low level control signal not enabling, to stop as adapter offer driving voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210293531.5A CN103594873B (en) | 2012-08-17 | 2012-08-17 | Plug detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210293531.5A CN103594873B (en) | 2012-08-17 | 2012-08-17 | Plug detection circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103594873A CN103594873A (en) | 2014-02-19 |
| CN103594873B true CN103594873B (en) | 2016-08-10 |
Family
ID=50084912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210293531.5A Active CN103594873B (en) | 2012-08-17 | 2012-08-17 | Plug detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103594873B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106299898B (en) * | 2015-06-02 | 2019-08-13 | 北京握奇智能科技有限公司 | A kind of interface protector and guard method |
| CN108539536B (en) * | 2018-03-13 | 2020-01-17 | Oppo广东移动通信有限公司 | Socket of electronic equipment, plug and data line |
| TWI710875B (en) * | 2019-05-23 | 2020-11-21 | 宏碁股份有限公司 | Electronic device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965450A (en) * | 2004-02-10 | 2007-05-16 | 柳韩电子株式会社 | A multifunctional multi-outlet of saving electric power and a control method employing the same |
| CN201117987Y (en) * | 2007-10-23 | 2008-09-17 | 徐一中 | Intelligent socket |
| CN201122745Y (en) * | 2007-11-19 | 2008-09-24 | 实盈电子(东莞)有限公司 | Detection switch structure of socket connector |
| CN201142473Y (en) * | 2007-11-06 | 2008-10-29 | 刘伟 | Autoswitch type USB electric power |
| CN201717397U (en) * | 2010-05-14 | 2011-01-19 | 张乃千 | Connector with power saving function |
| CN102386532A (en) * | 2010-08-27 | 2012-03-21 | 连展科技（深圳）有限公司 | High-frequency socket connector with plug sensing function |
-
2012
- 2012-08-17 CN CN201210293531.5A patent/CN103594873B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1965450A (en) * | 2004-02-10 | 2007-05-16 | 柳韩电子株式会社 | A multifunctional multi-outlet of saving electric power and a control method employing the same |
| CN201117987Y (en) * | 2007-10-23 | 2008-09-17 | 徐一中 | Intelligent socket |
| CN201142473Y (en) * | 2007-11-06 | 2008-10-29 | 刘伟 | Autoswitch type USB electric power |
| CN201122745Y (en) * | 2007-11-19 | 2008-09-24 | 实盈电子(东莞)有限公司 | Detection switch structure of socket connector |
| CN201717397U (en) * | 2010-05-14 | 2011-01-19 | 张乃千 | Connector with power saving function |
| CN102386532A (en) * | 2010-08-27 | 2012-03-21 | 连展科技（深圳）有限公司 | High-frequency socket connector with plug sensing function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103594873A (en) | 2014-02-19 |
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