# US 2021/0345508 A1 · Direct current connector, alternating current/direct current input device, and alternating current/direct current input system

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- Number: US 2021/0345508 A1
- Document ID: US20210345508A1
- Status: Published application
- Kind: A1
- Application number: 17/373,313
- Filed: 2021-07-12
- Published: 2021-11-04
- Earliest claimed: 2016-12-27
- Assignees: Huawei Technologies Co., Ltd.
- Applicants: Huawei Technologies Co., Ltd.
- Inventors: Guoqing ZHANG; Jiangtao WANG; Liang GAO
- Web page: https://patentgrep.com/patent/US20210345508A1

## CPC

- H05K 7/1455: {Coding for prevention of wrong insertion}
- H01R 13/04: Pins or blades for co-operation with sockets
- H01R 13/10: Sockets for co-operation with pins or blades
- H01R 13/71: Contact members of coupling parts operating as switch {, e.g. linear or rotational movement required after mechanical engagement of coupling part to establish electrical connection}
- H01R 24/70: with additional earth or shield contacts
- H01R 13/6485: {Electrostatic discharge protection (in general H05F1/00, for electric apparatus H05K9/0067)}
- H02M 3/33592: {having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer}
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P)

## Abstract

An alternating current/direct current input device includes an appliance input socket and an information and communications technology (ICT) device. The ICT device is powered by the appliance input socket. The appliance input socket includes a ground contact, a positive electrode contact, a negative electrode contact, and a signal switch. A contact depth of the signal switch in the appliance input socket is less than a contact depth of the positive electrode contact or the negative electrode contact in the appliance input socket. The signal switch is configured to generate a control signal when a direct current connector is separated from the appliance input socket. The control signal can be used to enable the ICT device to disconnect the appliance input socket from a conductive electrode of the direct current connector after the ICT device enters a no load state.

## Claims

### Claim 1

A direct current connector, comprising:
a ground contact;
a positive electrode contact;
a negative electrode contact; and
a fixed contact;
wherein the fixed contact protrudes outside of the direct current connector and is configured to prevent the direct current connector from being inserted into an alternating current appliance input socket having an external shape configured to prevent insertion of the fixed contact.

### Claim 2 (depends on 1)

The direct current connector according to claim 1, wherein the fixed contact distinguishes the direct current connector from an alternating current connector in appearance.

### Claim 3 (depends on 1)

The direct current connector according to claim 1, wherein the direct current connector is configured to receive only a high-voltage direct current (HVDC) input.

### Claim 4 (depends on 1)

The direct current connector according to claim 1, wherein the fixed contact is configured to be inserted into a direct current appliance input socket having an external shape configured to accommodate the fixed contact.

### Claim 5 (depends on 4)

The direct current connector according to claim 4, wherein the fixed contact distinguishes the direct current connector from an alternating current connector in appearance.

### Claim 6 (depends on 4)

The direct current connector according to claim 4, wherein the direct current connector is configured to receive only a high-voltage direct current (HVDC) input.

### Claim 7 (depends on 1)

The direct current connector according to claim 1, wherein the fixed contact is configured to be inserted into a general-purpose appliance input socket having an external shape configured to accommodate the fixed contact, and wherein the general-purpose appliance input socket is configured to be able to receive both an alternating current input and a direct current input.

### Claim 8 (depends on 7)

The direct current connector according to claim 7, wherein the fixed contact distinguishes the direct current connector from an alternating current connector in appearance.

### Claim 9 (depends on 7)

The direct current connector according to claim 7, wherein the direct current connector is configured to receive only a high-voltage direct current (HVDC) input.