CN203596646U - USB charger - Google Patents

USB charger Download PDF

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Publication number
CN203596646U
CN203596646U CN201320811334.8U CN201320811334U CN203596646U CN 203596646 U CN203596646 U CN 203596646U CN 201320811334 U CN201320811334 U CN 201320811334U CN 203596646 U CN203596646 U CN 203596646U
Authority
CN
China
Prior art keywords
charging circuit
charger
relay
voltage output
low
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.)
Active
Application number
CN201320811334.8U
Other languages
Chinese (zh)
Inventor
张北青
杨登峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NANJING YIHUA INFORMATION TECHNOLOGY Co.,Ltd.
Original Assignee
Shenzhen Yihua Computer Co Ltd
Shenzhen Yihua Time Technology Co Ltd
Shenzhen Yihua Financial Intelligent Research Institute
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Yihua Computer Co Ltd, Shenzhen Yihua Time Technology Co Ltd, Shenzhen Yihua Financial Intelligent Research Institute filed Critical Shenzhen Yihua Computer Co Ltd
Priority to CN201320811334.8U priority Critical patent/CN203596646U/en
Application granted granted Critical
Publication of CN203596646U publication Critical patent/CN203596646U/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a USB charger which comprises a charging circuit, an output interface, an inching switch and a relay. The charging circuit comprises a commercial power input wire and a low-voltage output terminal. An anode of the low-voltage output terminal of the charging circuit is connected with an anode pin of the output interface. The ground of the low-voltage output terminal of the charging circuit is connected with a grounding pin of the output interface. A normally-open contact of the relay is serially connected to the commercial power input wire of the charging circuit. The inching switch is in parallel connection with the normally-open contact of the relay. One end of a coil of the relay is connected with the anode of the low-voltage output terminal of the charging circuit, and the other end of the coil is connected with a metal housing of the output interface. After the charging of the USB charger is finished, a charged device is pulled out, the charger automatically cuts off the input power supply, the charger is prevented from being plugged in and pulled out frequently, and long-time electrifying of the charger is prevented, so that the service lifetime of the charger is prolonged, the electricity is saved, and the safety risks are reduced.

Description

A kind of USB charger
[technical field]
The utility model relates to charger, relates in particular to a kind of USB charger.
[background technology]
The current USB charger of all conventional electronic equipments on the market, after plugging in, output just has Voltage-output, a lot of people are because dislike trouble, the custom of charger not having be pulled up from socket after having charged, sometimes charger one month, even the longer time is all in energising operating state, has so not only shortened the useful life of charger, has more increased some unsafe factors in the time that the environment of some high temperature, high humility uses.Once had media report not pull up because mobile phone charging finishes rear charger, charger is switched on for a long time, and is in hot environment use, thereby causes charger internal short-circuit on fire, initiation fire.
[summary of the invention]
The technical problems to be solved in the utility model be to provide a kind of can auto-breaking, the life-span is long, performance easy to use, safe is good USB charger.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is, a kind of USB charger, comprise charging circuit, output interface, point driving switch and relay, charging circuit comprises civil power input line and low-voltage output, and the positive pole of charging circuit low-voltage output connects the anodal pin of output interface, and the ground of charging circuit low-voltage output connects the grounding leg of output interface, the normally opened contact of relay is connected in the civil power input line of charging circuit, and point driving switch is in parallel with the normally opened contact of relay; The positive pole of one termination charging circuit low-voltage output of relay coil, the metal shell of another termination output interface.
Above-described USB charger, comprises indicator light and current-limiting resistance, after indicator light is connected with current-limiting resistance, and the positive pole of a termination charging circuit low-voltage output, other end ground connection.
With described USB charger, comprise USB charging wire, described USB charging wire comprises the joint at shielding conductor and two ends, shielding conductor connects the metal shell of two end connectors.
After finishing, USB charger charging of the present utility model pulls up charging device, charger cuts off input power automatically, can avoid often plugging charger, can prevent that again charger from switching on for a long time, therefore can extend charger useful life, electrical energy saving, minimizing potential safety hazard.
[accompanying drawing explanation]
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Fig. 1 is the circuit theory diagrams of the utility model embodiment USB charger.
Fig. 2 is the winding diagram that the utility model embodiment meets the USB charging wire of GB and safety.
Fig. 3 is the winding diagram that does not meet the USB charging wire of GB and safety.
[embodiment]
The utility model embodiment USB charger comprises 5V charging circuit, output interface, point driving switch K1, relay K 3 as depicted in figs. 1 and 2, indicator light LED, current-limiting resistance R and a USB charging wire.
Charging circuit comprises civil power input line and the low-voltage output of 220V.Charging circuit+positive pole of 5V output connects the anodal pin of output interface, and the ground of charging circuit output connects the grounding leg of output interface.
The normally opened contact of relay K 3 is connected in the civil power input line of charging circuit 220V, and point driving switch K1 is in parallel with the normally opened contact of relay K 3.
The positive pole of one termination charging circuit low-voltage output of relay K 3 coils, the metal shell of another termination output interface.
Indicator light LED and current-limiting resistance R composition condition indication circuit.After indicator light LED connects with current-limiting resistance R, the positive pole of a termination charging circuit low-voltage output, other end ground connection.
As depicted in figs. 1 and 2, USB charging wire is the USB connecting line that meets GB and safety.The metal shell of two end connectors is all connected with shielding conductor.The USB charger of the utility model embodiment must use the USB connecting line with this shielding conductor.
K2 in Fig. 1 is virtual switch, is using on the charging device of USB interface, and the shell of interface is to be all connected with ground wire, and when the charging socket of USB connecting line (charging wire) insertion charging device, virtual switch K2 connects automatically.When USB connecting line is extracted, virtual switch K2 disconnects.
The utility model embodiment intelligence auto-breaking charger operation principle is as follows: charging device is connected with charger, virtual switch K2 connects, press point driving switch (charging starts trigger switch) K1, charger 5V circuit is connected civil power 220V, charging circuit output 5V voltage.The 1st pin input 5V power supply of relay K 3 coils, the 2nd pin is connected with power supply ground by shielding conductor, the virtual switch K2 of USB connecting line (charging wire), and the normally opened contact adhesive of relay K 3 keeps self-locking state.The luminous indication power connection of LED, charging starts.
Charge and finish, pull up charging device, virtual switch K2 disconnects, and relay K 3 coil two ends lose 5V voltage, and the normally opened contact of relay K 3 discharges, and the 220V civil power of 5V charging circuit disconnects, and LED lamp goes out and indicates power supply to disconnect.
Fig. 3 is the USB connecting line circuit diagram inferior (charging wire) that does not meet GB and safety, and part manufacturer omits shielding conductor for cost-saving.The USB charger of the intelligent auto-breaking of the utility model embodiment uses this type of USB connecting line by cisco unity malfunction.
The utility model embodiment USB charger has following advantage:
1. can prevent that charger from switching on for a long time, cause the generation of the phenomenon such as on fire after self damaging, damaging.
2. reduce charger conduction time, extend charger useful life.
3. avoid plugging charger in charging process, easy to use.
4. reduce charger energising stand-by time, electrical energy saving.

Claims (3)

1. a USB charger, comprise charging circuit and output interface, charging circuit comprises civil power input line and low-voltage output, the positive pole of charging circuit low-voltage output connects the anodal pin of output interface, the ground of charging circuit low-voltage output connects the grounding leg of output interface, it is characterized in that, comprises point driving switch and relay, the normally opened contact of relay is connected in the civil power input line of charging circuit, and point driving switch is in parallel with the normally opened contact of relay; The positive pole of one termination charging circuit low-voltage output of relay coil, the metal shell of another termination output interface.
2. USB charger according to claim 1, is characterized in that, comprises indicator light and current-limiting resistance, after indicator light is connected with current-limiting resistance, and the positive pole of a termination charging circuit low-voltage output, other end ground connection.
3. USB charger according to claim 1, is characterized in that, comprises USB charging wire, and described USB charging wire comprises the joint at shielding conductor and two ends, and shielding conductor connects the metal shell of two end connectors.
CN201320811334.8U 2013-12-10 2013-12-10 USB charger Active CN203596646U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320811334.8U CN203596646U (en) 2013-12-10 2013-12-10 USB charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320811334.8U CN203596646U (en) 2013-12-10 2013-12-10 USB charger

Publications (1)

Publication Number Publication Date
CN203596646U true CN203596646U (en) 2014-05-14

Family

ID=50677504

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320811334.8U Active CN203596646U (en) 2013-12-10 2013-12-10 USB charger

Country Status (1)

Country Link
CN (1) CN203596646U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018171241A1 (en) * 2017-03-24 2018-09-27 华为技术有限公司 Dual-shielding layer usb connector
CN109479074A (en) * 2017-03-24 2019-03-15 华为技术有限公司 The USB connector of double shield layer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018171241A1 (en) * 2017-03-24 2018-09-27 华为技术有限公司 Dual-shielding layer usb connector
CN109479074A (en) * 2017-03-24 2019-03-15 华为技术有限公司 The USB connector of double shield layer
CN109479074B (en) * 2017-03-24 2021-03-30 华为技术有限公司 USB connector with double shielding layers
US11171454B2 (en) 2017-03-24 2021-11-09 Huawei Technologies Co., Ltd. USB connector with double shield layers

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right

Effective date of registration: 20200817

Address after: 210000 Jiangsu, Nanjing City, Jiangsu Province, Yuhuatai District, Ande Gate Street, No. 50, East China Development and operation center, A seat 12

Patentee after: NANJING YIHUA INFORMATION TECHNOLOGY Co.,Ltd.

Address before: 27, A02, building 518000, Allianz building, 4018 Jintian Road, Shenzhen, Guangdong, Futian District

Co-patentee before: SHENZHEN YIHUA TIME TECHNOLOGY Co.,Ltd.

Patentee before: SHENZHEN YIHUA COMPUTER Co.,Ltd.

Co-patentee before: SHENZHEN YIHUA FINANCIAL INTELLIGENT Research Institute

TR01 Transfer of patent right