CN212210551U

CN212210551U - USB adapter for electric power track

Info

Publication number: CN212210551U
Application number: CN202021093245.0U
Authority: CN
Inventors: 叶立阳; 陈长华
Original assignee: Yueqing Zhenqi Electric Technology Co ltd
Current assignee: Yueqing Zhenqi Electric Technology Co ltd
Priority date: 2020-06-13
Filing date: 2020-06-13
Publication date: 2020-12-22
Anticipated expiration: 2030-06-13

Abstract

The utility model discloses a USB adapter for electric power track, which comprises a USB adapter capable of being fixed on the electric power track, wherein the USB adapter comprises a shell, a circuit board and a charging interface group, the charging interface group comprises two USB interfaces capable of respectively outputting 1A current and 2A current, and the circuit board is provided with a rectification step-down circuit connected with commercial power and a charging circuit connected with the rectification step-down circuit; the rectifying and voltage-reducing circuit comprises a rectifying bridge BD1 and a transformer T1, the charging circuit comprises a charging chip U3, the rectifying bridge BD1 is powered by mains supply and is connected with a primary coil of the transformer T1, a secondary coil of the transformer T1 is used for supplying power to the charging chip U3, the charging chip U3 is provided with two-way output pins capable of outputting different currents, and the two-way output pins are respectively connected with two USB interfaces to output corresponding 1A current and 2A current. The utility model has the advantages of it is following and effect: the current of 1A and 2A can be respectively output, thereby bringing great convenience to the daily use of users.

Description

USB adapter for electric power track

Technical Field

The utility model relates to a power equipment technical field, in particular to be used for orbital USB adapter of electric power.

Background

In the home and business environment, the conventional electric power distribution system is provided by the power receiving point, which is generally installed in the wall cavity or on the surface of a predetermined position, and the position of such power receiving point needs to be selected in advance, however, people often find that the power receiving point is installed in a wrong place or the number of the power receiving points is insufficient in the actual use process, so that a power track is invented, and only a power adapter needs to be inserted into the power track to be used as a power receiving point.

In the market, a USB adapter for a power rail is very popular, and the USB adapter is generally connected to 220V ac mains and performs step-down rectification to realize 5V dc voltage output so as to charge a mobile device; however, the USB adapter standardizes the production standard during production, and generally has only the charging current of output 1A or only the charging current of output 2A, which undoubtedly makes it have a large use limitation; for example, when the USB adapter with an output current of 1A charges a tablet computer, the charging speed is slow; when the USB adapter with the output current of 2A is used for charging the mobile phone, the service life of the battery is easily shortened due to the fact that the current is large; therefore, if a USB adapter capable of outputting 1A and 2A currents respectively is provided, great convenience is certainly brought to daily use of users.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a USB adapter for electric power track to solve the problem that proposes in the background art.

The above technical purpose of the present invention can be achieved by the following technical solutions: a USB adapter for an electric power track comprises a USB adapter capable of being fixed on the electric power track, wherein the USB adapter comprises a shell, a circuit board and a charging interface group, the circuit board is fixedly arranged in the shell, the charging interface group comprises two USB interfaces capable of outputting 1A current and 2A current respectively, the two USB interfaces are fixed in the shell and are electrically connected with the circuit board, and the upper end surface of the shell is correspondingly provided with a socket for the two USB interfaces to extend out; the circuit board is provided with a rectification step-down circuit connected with commercial power and a charging circuit connected with the rectification step-down circuit; the rectifying and voltage-reducing circuit comprises a rectifying bridge BD1 and a transformer T1, the charging circuit comprises a charging chip U3, the rectifying bridge BD1 is powered by mains supply and outputs the rectified input voltage of the mains supply to a primary coil of the transformer T1, a secondary coil of the transformer T1 supplies power to the charging chip U3, the charging chip U3 is provided with a double-path output pin capable of outputting different currents, and the double-path output pin is connected with two USB interfaces respectively to output corresponding 1A current and 2A current.

The further setting is that: the USB adapter also comprises a display screen for displaying current values and voltage values, the display screen is arranged on the upper end face of the shell and is electrically connected with a circuit board in the shell, and a driving chip U4 for driving the display screen to display is arranged on the circuit board.

The further setting is that: the charging circuit also comprises a rectifying chip U2 which can avoid false operation caused by excitation oscillation, the input end of the rectifying chip U2 is connected with the secondary coil of the transformer T1, and the output end of the rectifying chip U2 supplies power for the charging chip U3 and the driving chip U4.

The further setting is that: the charging circuit further comprises a resistor R24, a resistor R25, a capacitor C7, a resistor R26, a resistor R27 and a capacitor C8, one end of the resistor R24 is connected with one end of the resistor R25, the other end of the resistor R24 is connected with an enable pin of the driving chip U4 and one end of the capacitor C7, the other end of the capacitor C7 and the other end of the resistor R25 are grounded, and a ground wire of one USB interface is connected between the resistor R25 and the resistor R24; one end of the resistor R26 is connected with one end of the resistor R27, the other end of the resistor R26 is connected with an enable pin of the driving chip U4 and one end of the capacitor C8, the other end of the capacitor C8 and the other end of the resistor R27 are grounded, and the ground wire of the other USB interface is connected between the resistor R26 and the resistor R27.

The further setting is that: the rectifying and voltage-reducing circuit further comprises a DC-DC chip U1 for reducing voltage, and the DC-DC chip U1 is connected to an auxiliary coil of the transformer T1.

The further setting is that: the ground wire comprises a primary ground wire and a secondary ground wire, and the primary coil of the transformer T1, the auxiliary coil of the transformer T1 and the DC-DC chip U1 are all connected to the primary ground wire; the secondary coil of the transformer T1, the rectifying chip U2, the charging chip U3, the driving chip U4, the display screen and the two USB interfaces are all connected to a secondary ground wire; and a capacitor Y1 for filtering is connected between the primary ground wire and the secondary ground wire.

The beneficial effects of the utility model reside in that:

1. the utility model has the USB charging interface which can respectively output 1A current and 2A current, and can be adapted to various different mobile devices, thereby bringing great convenience to the daily use of users; and simultaneously, the utility model discloses a circuit structure is very simple, and the electronic component that uses is small in quantity, can not only back reduction in production cost, and welding and paster work when being convenient for produce moreover improve production efficiency.

2. The utility model discloses in still be provided with the display screen, can show magnitude of voltage and current value at any time, the visual charged state of looking over of convenience of customers is very convenient.

3. The utility model discloses in through setting up rectifier chip U2, avoid the malfunction because of exciting the oscillation and arousing, let the work of whole circuit more reliable, stable.

4. The utility model discloses in through set up resistance R24, resistance R25, electric capacity C7, resistance R26, resistance R27 and electric capacity C8 at charging circuit, realize output current's adjustable, many specifications production chain when more convenient expansion production.

5. The utility model discloses in fall into elementary ground wire and secondary ground wire with the ground wire, the mutual interference between the high pressure around the elimination transformer T1 that from this can be better and low pressure, connect electric capacity Y1 simultaneously between elementary ground wire and secondary ground wire and come further filtering, let this circuit more stable.

Drawings

FIG. 1 is a schematic structural view of an embodiment of the present invention when mounted on a power track;

FIG. 2 is a circuit diagram of a rectifying and voltage-reducing circuit in an embodiment;

fig. 3 is a circuit diagram of a charging circuit in an embodiment.

In the figure: 1. a shell, 11 and a socket; 2. a USB interface; 3. a double-path output pin; 4. a display screen.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 to 3, a USB adapter for a power rail includes a USB adapter that can be fixed on a power rail; the fixing of the USB adapter and the power rail belongs to the technical means of the conventional technology, and is not further described here.

Specifically, the USB adapter is including casing 1, circuit board and the interface group that charges, and the circuit board is fixed to be set up in casing 1, and the interface group that charges is including two USB interfaces 2 that can export 1A electric current and 2A electric current respectively, and two USB interfaces 2 are all fixed in casing 1 and are connected with the circuit board electricity, and casing 1's up end corresponds and is provided with the socket 11 that supplies two USB interfaces 2 to stretch out. Of course, the USB interface 2 may be set to 3, 4, or the like.

A rectification step-down circuit connected with the mains supply and a charging circuit connected with the rectification step-down circuit are arranged on the circuit board; the rectifying and voltage-reducing circuit comprises a rectifying bridge BD1 and a transformer T1, the charging circuit comprises a charging chip U3, the rectifying bridge BD1 is powered by mains supply and rectifies input voltage of the mains supply and outputs the rectified voltage to a primary coil of the transformer T1, a secondary coil of the transformer T1 supplies power to the charging chip U3, the charging chip U3 is provided with a double-path output pin 3 capable of outputting different currents, and the double-path output pin 3 is respectively connected with two USB interfaces 2 to output corresponding 1A current and 2A current. The primary winding of transformer T1 corresponds to

pins

3 and 4 in fig. 2, the secondary winding of transformer T1 corresponds to pins 5 and 6 in fig. 2, and the auxiliary winding of transformer T1 corresponds to

pins

1 and 2 in fig. 2.

The USB adapter also comprises a display screen 4 for displaying current values and voltage values, the display screen 4 is arranged on the upper end face of the shell 1 and is electrically connected with a circuit board in the shell 1, and a driving chip U4 for driving the display screen 4 to display is arranged on the circuit board. The display 4 is mounted on the upper end face of the housing 1, which is not shown in fig. 1.

The charging circuit also comprises a rectifying chip U2 which can avoid false operation caused by excitation oscillation, the input end of the rectifying chip U2 is connected with the secondary coil of the transformer T1, and the output end of the rectifying chip U2 supplies power to the charging chip U3 and the driving chip U4.

The charging circuit further comprises a resistor R24, a resistor R25, a capacitor C7, a resistor R26, a resistor R27 and a capacitor C8, one end of the resistor R24 is connected with one end of the resistor R25, the other end of the resistor R24 is connected with an enabling pin of the driving chip U4 and one end of the capacitor C7, the other end of the capacitor C7 and the other end of the resistor R25 are grounded, and a ground wire of one USB interface 2 is connected between the resistor R25 and the resistor R24; one end of the resistor R26 is connected with one end of the resistor R27, the other end of the resistor R26 is connected with an enable pin of the driving chip U4 and one end of the capacitor C8, the other end of the capacitor C8 and the other end of the resistor R27 are both grounded, and the ground wire of the other USB interface 2 is connected between the resistor R26 and the resistor R27.

The rectifying and voltage-reducing circuit further comprises a DC-DC chip U1 for reducing voltage, and the DC-DC chip U1 is connected to an auxiliary coil of the transformer T1.

In this embodiment, the model of the rectifier bridge BD1 is MB6S, the model of the DC-DC chip U1 is 92FPB1, the model of the rectifier chip U2 is LP3510, the model of the charging chip U3 is IP2112A a12X, the model of the driving chip U4 is PIC16F505, and the display panel 4 is lcd 1602.

The ground wires include a primary ground wire (AC-GND as labeled in the figure) and a secondary ground wire (DC-GND as labeled in the figure), and the primary coil of the transformer T1, the auxiliary coil of the transformer T1 and the DC-DC chip U1 are all connected to the primary ground wire; the secondary coil of the transformer T1, the rectifying chip U2, the charging chip U3, the driving chip U4, the display screen 4 and the two USB interfaces 2 are all connected to a secondary ground wire; a capacitor Y1 for filtering is connected between the primary ground line and the secondary ground line.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. A USB adapter for a power track, comprising a USB adapter fixable to the power track, characterized in that:

the USB adapter comprises a shell (1), a circuit board and a charging interface group, wherein the circuit board is fixedly arranged in the shell (1), the charging interface group comprises two USB interfaces (2) capable of respectively outputting 1A current and 2A current, the two USB interfaces (2) are both fixed in the shell (1) and are electrically connected with the circuit board, and the upper end surface of the shell (1) is correspondingly provided with a socket (11) for the two USB interfaces (2) to extend out;

the circuit board is provided with a rectification step-down circuit connected with commercial power and a charging circuit connected with the rectification step-down circuit; the rectifying and voltage-reducing circuit comprises a rectifying bridge BD1 and a transformer T1, the charging circuit comprises a charging chip U3, the rectifying bridge BD1 is powered by mains supply and outputs the rectified input voltage of the mains supply to a primary coil of the transformer T1, a secondary coil of the transformer T1 supplies power to the charging chip U3, the charging chip U3 is provided with a double-path output pin (3) capable of outputting different currents, and the double-path output pin (3) is connected with two USB interfaces (2) respectively to output corresponding 1A current and 2A current.

2. A USB adapter for a power rail according to claim 1, wherein: the USB adapter further comprises a display screen (4) used for displaying a current value and a voltage value, the display screen (4) is arranged on the upper end face of the shell (1) and is electrically connected with a circuit board in the shell (1), and a driving chip U4 used for driving the display screen (4) to display is arranged on the circuit board.

3. A USB adapter for a power rail according to claim 2, wherein: the charging circuit also comprises a rectifying chip U2 which can avoid false operation caused by excitation oscillation, the input end of the rectifying chip U2 is connected with the secondary coil of the transformer T1, and the output end of the rectifying chip U2 supplies power for the charging chip U3 and the driving chip U4.

4. A USB adapter for a power rail according to claim 3, wherein: the charging circuit further comprises a resistor R24, a resistor R25, a capacitor C7, a resistor R26, a resistor R27 and a capacitor C8, wherein one end of the resistor R24 is connected with one end of the resistor R25, the other end of the resistor R24 is connected with an enable pin of the driving chip U4 and one end of the capacitor C7, the other end of the capacitor C7 and the other end of the resistor R25 are grounded, and a ground wire of one USB interface (2) is connected between the resistor R25 and the resistor R24; one end of the resistor R26 is connected with one end of the resistor R27, the other end of the resistor R26 is connected with an enable pin of the driving chip U4 and one end of the capacitor C8, the other end of the capacitor C8 and the other end of the resistor R27 are both grounded, and the ground wire of the other USB interface (2) is connected between the resistor R26 and the resistor R27.

5. A USB adapter for a power track according to claim 4, wherein: the rectifying and voltage-reducing circuit further comprises a DC-DC chip U1 for reducing voltage, and the DC-DC chip U1 is connected to an auxiliary coil of the transformer T1.

6. A USB adapter for a power track according to claim 4, wherein: the ground wire comprises a primary ground wire and a secondary ground wire, and the primary coil of the transformer T1, the auxiliary coil of the transformer T1 and the DC-DC chip U1 are all connected to the primary ground wire; the secondary coil of the transformer T1, the rectifying chip U2, the charging chip U3, the driving chip U4, the display screen (4) and the two USB interfaces (2) are all connected to a secondary ground wire; and a capacitor Y1 for filtering is connected between the primary ground wire and the secondary ground wire.