CN205141294U - Socket with USB charging function - Google Patents

Abstract

The utility model relates to a socket, in particular to a socket with a USB charging function. The utility model discloses a socket with USB charging function, which comprises a casing, an electronic circuit arranged in the casing, a socket jack, a USB charging interface and a micro switch arranged on the casing. The circuit includes a low-voltage DC power supply drive circuit, an electronic switch logic control circuit, an electronic switch circuit, a button circuit and a USB charging control circuit, and the button circuit includes the micro switch. The utility model has the advantages of simple circuit structure, low cost and less energy consumption, and has high application and popularization value.

Description

A socket with USB charging function

technical field

The utility model relates to a socket, in particular to a socket with a USB charging function.

Background technique

With the popularity of electronic products with charging functions such as mobile phones, and the current charging standards and interfaces are gradually standardized, a new type of socket that adds a USB charging device to the socket has emerged.

In order to highlight the overall appearance of the socket, the switch of this type of socket will use an electronic switch to replace the traditional rocker switch or self-locking switch, enhancing its modernity and user experience.

That is, the method of controlling the electromagnetic relay with a light touch switch replaces the strong current self-locking switch to cut off or connect the socket power. The electromagnetic relay itself needs to provide a certain current through the step-down circuit to be driven, so as to realize the conduction and disconnection of the relay contacts and finally realize the cut-off and connection of the power supply of the socket.

Currently, for such sockets containing USB charging devices, the power used by the USB charging circuit is separated from the driving power used by the electronic switch. That is, the USB charging circuit needs a separate power supply for power supply, and the driving of the electronic switch needs a step-down circuit to provide driving power.

In this way, the cost of the whole product is virtually increased. Because there are two power circuits, each power circuit has its own certain additional loss, and it also indirectly increases the standby current of the whole product, wasting precious power.

Contents of the invention

The purpose of the utility model is to provide a socket with USB charging function with simple circuit structure, low cost and low energy consumption in order to solve the above problems.

For this reason, the utility model discloses a socket with a USB charging function, which includes a casing, an electronic circuit arranged in the casing, a socket jack, a USB charging interface and a micro switch arranged on the casing , the electronic circuit includes a low-voltage DC power supply drive circuit, an electronic switch logic control circuit, an electronic switch circuit, a button circuit and a USB charging control circuit, the button circuit includes the micro switch, and the input terminal of the low-voltage DC power supply drive circuit is connected to External alternating current, the output terminals are respectively connected to the power supply input terminals of the electronic switch logic control circuit and the USB charging control circuit, the control output terminal of the electronic switch logic control circuit is connected to the control input terminal of the electronic switch circuit, and the output of the USB charging control circuit The terminal is connected to the USB charging interface, the external alternating current is connected to the socket jack through the electronic switch circuit, and the button circuit is connected to the control input terminal of the electronic switch logic control circuit.

Further, the electronic circuit further includes a display circuit connected to the electronic switch logic control circuit.

Further, the display circuit is an LED display circuit.

Further, the electronic switch logic control circuit is a single-chip microcomputer control circuit.

Further, the electronic switch circuit is an electromagnetic relay switch circuit.

Further, the number of the electronic switch is one, the number of the micro switch is one, the micro switch controls the electronic switch through the electronic switch logic control circuit, and the external alternating current passes through the electronic switch and each Socket jack connection.

Further, the number of the electronic switches is more than 2, the number of the micro switches is the same as the number of the electronic switches, each electronic switch is controlled through the electronic switch logic control circuit, and the external alternating current is respectively passed through each electronic switch and the electronic switch. Each socket socket is connected one by one.

Further, the low-voltage DC power supply drive circuit includes a step-down circuit and a rectifier circuit, and the external AC power is stepped-down and rectified by the step-down circuit and the rectifier circuit to a low-voltage direct current, and then supplies power to the electronic switch logic control circuit and the USB charging control circuit.

Further, the USB charging control circuit includes a charging overvoltage and overcurrent protection circuit and a charging switch circuit, the input terminal of the charging switch circuit is connected to the output terminal of the low-voltage DC power supply drive circuit, and the output terminal is connected to the USB charging interface. The input terminal of the overvoltage and overcurrent protection circuit is connected to the USB charging interface, and the output terminal is connected to the control input terminal of the charging switch circuit.

Beneficial technical effects of the utility model:

The driving power of the electronic switch of the utility model and the power used by the USB charging circuit are provided by the same power circuit, so that the whole circuit has simple structure, convenient manufacture, low cost and less power consumption.

Description of drawings

Fig. 1 is a structural block diagram of an embodiment of the present invention.

detailed description

The utility model is further described now in conjunction with accompanying drawing and specific embodiment.

As shown in Figure 1, a socket with a USB charging function includes a housing, an electronic circuit disposed in the housing, a socket jack 800, a USB charging interface 900 and a micro switch disposed on the housing , the electronic circuit includes a low-voltage DC power supply drive circuit 200, an electronic switch logic control circuit 300, an electronic switch circuit 600, a button circuit 400 and a USB charging control circuit 500, the button circuit 400 includes the micro switch, and the low-voltage DC power supply drive circuit 200 The input end of the input terminal is connected to an external AC power (220V mains in this embodiment), and the output end is respectively connected to the power input end of the electronic switch logic control circuit 300 and the USB charging control circuit 500. In this specific embodiment, the low-voltage DC power supply drive circuit 200 It includes a step-down circuit and a rectification circuit. After the 220V mains is stepped down and rectified by the step-down circuit and the rectification circuit, it provides 5V DC power for the electronic switch logic control circuit 300 and the USB charging control circuit 500 .

The control output terminal of the electronic switch logic control circuit 300 is connected to the control input terminal of the electronic switch circuit 600 for controlling the on-off of the electronic switch, and the button circuit 400 is connected to the control input terminal of the electronic switch logic control circuit 300 for providing the electronic switch circuit The on-off control signal of 600, the external alternating current 100 is connected with the socket jack 800 through the electronic switch circuit 600 to provide power for external electrical equipment. Specifically, the electronic switch logic control circuit 300 is a single-chip microcomputer control circuit, of course, in other embodiments, it can also be a PLC control circuit or an MCU control circuit, and the electronic switch circuit 600 is an electromagnetic relay switch circuit. The number of electromagnetic relays can be one or more. When the number of electromagnetic relays is one, the number of micro switches is also one. The micro switches control the on-off of the electromagnetic relays through the single-chip microcomputer control circuit 300, and the 220V mains Connect with each socket jack 800 through this electromagnetic relay; The electricity is respectively connected to each socket jack 800 one by one through each electromagnetic relay, so that the on-off of each socket jack 800 can be individually controlled, which is convenient to use.

The output terminal of the USB charging control circuit 500 is connected to the USB charging interface 900, and is used to control the charging of an external charging device connected to the USB charging interface 900. Specifically, the USB charging control circuit 500 includes a charging overvoltage and overcurrent protection circuit and a charging switch. circuit, the input terminal of the charging switch circuit is connected to the output terminal of the DC low-voltage power supply drive circuit 200, the output terminal is connected to the USB charging interface 900, and is used to control the charging function of the USB, and the input terminal of the charging overvoltage and overcurrent protection circuit is connected to the USB charging interface 900 , the output terminal is connected to the control input terminal of the charging switch circuit, which is used for overvoltage and overcurrent protection of USB charging.

Further, the electronic circuit also includes a display circuit 700, the display circuit 700 is connected to the single-chip microcomputer control circuit 300, specifically, the display circuit 700 is an LED display circuit, of course, it can also be an LCD indicator circuit, and the LED display is arranged on the socket housing , used to display the on-off status of the electromagnetic relay.

Although the utility model has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that, without departing from the spirit and scope of the utility model defined by the appended claims, changes in form and details may be made. Making various changes to the utility model is within the protection scope of the utility model.

Claims (9)

1. A socket with a USB charging function, comprising a housing, an electronic circuit disposed in the housing, a socket jack, a USB charging interface and a micro switch disposed on the housing, characterized in that: the The electronic circuit includes a low-voltage DC power drive circuit, an electronic switch logic control circuit, an electronic switch circuit, a key circuit and a USB charging control circuit, the key circuit includes the micro switch, and the input terminal of the low-voltage DC power drive circuit is connected to an external AC power , the output terminals are respectively connected to the power input terminals of the electronic switch logic control circuit and the USB charging control circuit, the control output terminal of the electronic switch logic control circuit is connected to the control input terminal of the electronic switch circuit, and the output terminal of the USB charging control circuit is connected to The USB charging interface, the external alternating current is connected to the socket jack through the electronic switch circuit, and the button circuit is connected to the control input end of the electronic switch logic control circuit. 2. The socket with USB charging function according to claim 1, wherein the electronic circuit further comprises a display circuit connected to the electronic switch logic control circuit. 3. The socket with USB charging function according to claim 2, wherein the display circuit is an LED display circuit. 4. The socket with USB charging function according to claim 1, wherein the electronic switch logic control circuit is a single-chip microcomputer control circuit. 5. The socket with USB charging function according to claim 1, wherein the electronic switch circuit is an electromagnetic relay switch circuit. 6. The socket with USB charging function according to any one of claims 1 to 5, characterized in that: the number of the electronic switch is one, the number of the micro switch is one, and the micro switch The electronic switch is controlled by an electronic switch logic control circuit, and the external alternating current is connected to each socket jack through the electronic switch. 7. The socket with USB charging function according to any one of claims 1 to 5, characterized in that: the number of said electronic switches is more than 2, and the number of said micro switches is the same as the number of said electronic switches, respectively Each electronic switch is controlled by an electronic switch logic control circuit, and the external alternating current is respectively connected to each socket jack one by one through each electronic switch. 8. The socket with USB charging function according to claim 1, characterized in that: the low-voltage DC power supply drive circuit includes a step-down circuit and a rectifier circuit, and the external alternating current is step-down and rectified by the step-down circuit and the rectifier circuit. The low-voltage direct current supplies power for the electronic switch logic control circuit and the USB charging control circuit. 9. The socket with USB charging function according to claim 1, characterized in that: the USB charging control circuit includes a charging overvoltage and overcurrent protection circuit and a charging switch circuit, and the input terminal of the charging switch circuit is connected to a low-voltage direct current The output terminal of the power drive circuit is connected to the USB charging interface, the input terminal of the charging overvoltage and overcurrent protection circuit is connected to the USB charging interface, and the output terminal is connected to the control input terminal of the charging switch circuit.