CN206250783U

CN206250783U - USB charging devices

Info

Publication number: CN206250783U
Application number: CN201621112089.1U
Authority: CN
Inventors: 林嘉桦
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-10-11
Filing date: 2016-10-11
Publication date: 2017-06-13
Anticipated expiration: 2026-10-11

Abstract

A kind of USB charging devices, including：One recharging base, the recharging base has a housing, the housing tip surface is provided with multiple fixing grooves, the fixation trench bottom is provided with one first jack, one second jack and one the 3rd jack, the enclosure interior is provided with a charging circuit substrate, and the charging circuit substrate is connected with the power line of an ac plug；An at least USB charger, one surface of the USB charger is provided with a USB slot, a fixation projection is provided with another surface, one first conductive pole, one second conductive pole and one the 3rd conductive pole are extended with the fixation projection, and it is internally provided with a USB circuit substrate in USB charger, there is the galvanic first electrode of output and second electrode on the USB circuit substrate, make user according to the putting position of electronic installation and the length of USB charging wires, the insertion that voluntarily selecting the fixing groove being best suitable for carries out USB charger is positioned.

Description

USB charging devices

Technical field

The utility model particularly relates to a kind of to put position according to electronic installation on technical field of electronic products Put, voluntarily select the fixing groove being best suitable for insert USB charger and position, to reach the USB charging devices that optimal spatial is utilized.

Background technology

Rechargeable electronic product has been widely used, such as intelligent mobile phone or tablet PC or Bluetooth loudspeaker or its His portable electric product etc. must could all be used with power supply, therefore, when the electric power of electronic product will exhaust or consume When to the greatest extent, i.e., can be just continuing with after must being charged, therefore, each rechargeable electronic product can add a charging wire And cradle.

Existing cradle generally includes a USB charging wire and a transformer with USB slot, and the transformer can have One ac plug and a USB slot, the USB slot are used for the USB joint insertion electric connection of USB charging wires, and USB connects The other end of wiring is then electrically connected with electronic product；It is inserted directly into AC outlet by ac plug, to guide friendship In stream electricity to transformer, while after converting alternating current to direct current, being charged to electronic product by USB charging wires.So And though existing charger can charge to electronic product, because modern people nearly all possess various Rechargeable electronics simultaneously Product, and quantity and the position of wall socket or elongation line socket are limited to, and multiple electronic products cannot be carried out simultaneously Charge, and if because charge position is fixed, can make how electronic product is neatly put simultaneously to the charging of multiple electronic products It is a problem to be solved.

Therefore, multiple electronic products can be charged simultaneously if one kind can be developed, again can in a limited space, by electronics Product is neatly put, and the size and the charging space charging socket that freely selection is adapted to of the charge prepd that can arrange in pairs or groups are filled Electricity, so should be a best solution.

Utility model content

A kind of USB charging devices, including：One recharging base, the recharging base has a housing, and the housing tip surface sets Multiple fixing grooves are equipped with, the fixation trench bottom is provided with one first jack, one second jack and one the 3rd jack, the enclosure interior A charging circuit substrate is provided with, the charging circuit substrate is connected with the power line of an ac plug, makes charging circuit board Can receive alternating current, and convert alternating current to direct current electricity output and lead to one first electric-conductor, one second electric-conductor and one the 3rd In electric part, wherein, on first electric-conductor, the second electric-conductor and the 3rd electric-conductor have respectively with first jack, this second On jack and the 3rd jack mutually corresponding location hole, and first electric-conductor and the 3rd electric-conductor and charging circuit substrate Galvanic first electrode is exported to be connected, and second electric-conductor is connected with galvanic second electrode is exported；At least one USB charger a, surface of the USB charger is provided with a USB slot, and a fixation projection is provided with another surface, and this is consolidated Determine to be extended with one first conductive pole, one second conductive pole and one the 3rd conductive pole on projection, and set in the inside of USB charger There is a USB circuit substrate, there is the galvanic first electrode of output and second electrode on the USB circuit substrate, wherein, this first Conductive pole and the 3rd conductive pole are connected with the first electrode of USB circuit substrate, and the second conductive pole then with USB circuit substrate Second electrode be connected, the first electrode and second electrode are electrically connected with USB slot simultaneously, are received USB charger Direct current can transmit to USB slot output；And the USB charger exports galvanic first electrode and second with recharging base The polarity of electrode is identical, the first conductive pole and the 3rd conductive pole and the first electric-conductor and the 3rd electric-conductor is exported galvanic electricity It is extremely identical, and the second conductive pole is identical with the second electric-conductor galvanic electrode of output；First conduction of the USB charger Post, second conductive pole and the 3rd conductive pole insert first jack of recharging base, second jack and the 3rd respectively In jack, and insert the location hole of first electric-conductor, second electric-conductor and the 3rd electric-conductor simultaneously, this first is led Electric post, second conductive pole and the 3rd conductive pole and first electric-conductor, second electric-conductor and the 3rd electric-conductor are electrical Connection, by the USB slot of direct current electricity output to USB connector；And the fixed block of the USB can be inserted and be tight with recharging base Fixing groove in, USB charger is positioned on recharging base.

In a preferred embodiment, wherein, the charging circuit substrate mainly includes：One circuit overcurrent protection, a rectification Filter circuit, an electromagnetic interference (EMI) protection filter circuit, a slow starting control circuit, an overvoltage checking circuit, a pulse Width modulated (PWM) controlling power circuit, a pulse width modulation (PWM) control circuit, a metal-oxide half field effect transistor （MOSFET）Circuit, an output current checking circuit, a transformer and an output rectifier and filter；Wherein, the over current protection Protection circuit is used to receive alternating current, and exchange electricity output is protected with line fault；The current rectifying and wave filtering circuit and overcurrent Protection circuit is electrically connected with, and the alternating current of reception is converted into direct current；The electromagnetic interference (EMI) protection filter circuit is one Low pass filter, receives the signal from rectifier filter, is used to suppress to be sent to after high-frequency noise is electric with stable DC The transformer and the slow starting control circuit；After the slow starting control circuit receives the signal from EMI protection filter circuits, meeting The pwm control circuit soft start function is provided, prevents output voltage also and then unstable in the non-complete stability of input direct voltage It is fixed；After the transformer receives the signal of EMI protection filter circuits, the PWM controlling power circuits can be transmitted signals to, this is excessively electric Pressure checking circuit and MOSFET circuits, after the overvoltage checking circuit receives the signal of transformer, understand the defeated of controlled output voltage Go out magnitude of voltage, it is to avoid output voltage is too high, and pwm control circuit will be sent to after the letter after treatment；The pulse width modulation (PWM) after controlling power circuit receives the signal of transformer, the DC voltage of action required for the pwm control circuit can be provided extremely In pwm control circuit；The pulse width modulation (PWM) control circuit is received and comes from the slow starting control circuit, overvoltage detection The signal of circuit, the PWM controlling power circuits and the output current checking circuit, to the output of control voltage and electric current stabilization Into MOSFET circuits；The metal-oxide half field effect transistor（MOSFET）Circuit receives the signal from transformer, for controlling to become The output switch actuation time of depressor, and be electrically connected with output current detection signal, make the output current checking circuit can be right Output current is detected with output overcurrent, and testing result is sent into pwm control circuit, when MOSET circuits order about change During depressor output direct current, the DC signal can be sent to the output rectifier and filter, make the output rectifier and filter The pulse waveform signal rectification that transformer is exported is direct current electricity output, and exporting galvanic electrode includes first electrode and second Electrode.

In a preferred embodiment, wherein, the first electrode be positive electrode (Vcc) when, and second electrode be negative electrode (GND)。

In a preferred embodiment, wherein, the first electrode be negative electrode (GND) when, and second electrode be positive electrode (Vcc)。

In a preferred embodiment, wherein, the output of the charging circuit substrate and the USB chargings substrate it is galvanic this first When electrode is negative electrode (GND), the second electrode is positive electrode (Vcc).

In a preferred embodiment, wherein, the output of the charging circuit substrate and the USB chargings substrate it is galvanic this first When electrode is positive electrode (Vcc), second electrode is negative electrode (GND).

In a preferred embodiment, wherein, the wherein side of the housing of the recharging base is provided with least one or one AC outlet above, the AC outlet is electrically connected with the power line of ac plug, makes AC outlet exportable Alternating current, supplied for electronic product is used.

In a preferred embodiment, wherein, can simultaneously plug multiple USB chargers on the recharging base, each USB charges The USB slot of device collocation different size.

In a preferred embodiment, also including one or more compartment seat, the bottom of compartment seat is provided with one Fixed projection, the fixation projection can be inserted into the fixing groove of recharging base, compartment seat is fixed in the fixing groove of recharging base, As an electronic installation against interval, and it is used as dust-proof, it is to avoid foul or dust are fallen into fixing groove.

In a preferred embodiment, wherein, the recharging base is not provided with being provided with building blocks projection on the wall of fixing hole, with A building blocks can be also combined for the assembling of building blocks, and in the fixing groove of the recharging base, by the combination of building blocks, and is formed to have and made The panel wall or outer wall of type, make electronic installation stabilization put against.

The utility model can charge to multiple electronic products simultaneously, again can be neat by electronic product in a limited space Put, and the size and the charging space charging socket that freely selection is adapted to of the charge prepd that can arrange in pairs or groups are charged.

Brief description of the drawings

Fig. 1：The schematic perspective view of USB charging devices of the present utility model；

Fig. 2：The schematic top plan view of USB charging devices of the present utility model；

Fig. 3：The generalized section of USB charging devices of the present utility model；

Fig. 4：The charging circuit substrate block diagram of USB charging devices of the present utility model；

Fig. 5：The charging circuit substrate circuit figure of USB charging devices of the present utility model；

Fig. 6：The USB circuit substrate block diagram of USB charging devices of the present utility model；

Fig. 7：First implementation schematic diagram of USB charging devices of the present utility model；

Fig. 8：Second implementation schematic diagram of USB charging devices of the present utility model.

Description of reference numerals

1 recharging base

11 housings

12 fixing grooves

121 first jacks

122 second jacks

123 the 3rd jacks

13 building blocks projections

2 USB chargers

21 USB slots

22 fix projection

221 first conductive poles

222 second conductive poles

223 the 3rd conductive poles

23 USB circuit substrates

3 compartments seat

31 fix projection

4 charging circuit substrates

41 circuit overcurrent protections

42 current rectifying and wave filtering circuits

43 electromagnetic interferences (EMI) protect filter circuit

44 slow starting control circuits

45 overvoltage checking circuits

46 pulse width modulations (PWM) controlling power circuit

47 pulse width modulations (PWM) control circuit

48 metal-oxide half field effect transistors（MOSFET）Circuit

49 output current checking circuits

50 transformers

52 output rectifier and filters

5 ac plugs

51 power lines

61 first electric-conductors

62 second electric-conductors

63 the 3rd electric-conductors

611st, 621,631 location hole

7 AC outlets

8 electronic installations

81 USB charging wires

9 building blocks.

Specific embodiment

Other technologies content of the present utility model, feature and effect are related to, in the preferable reality of following cooperation refer to the attached drawing Apply in the detailed description of example, can clearly present.

Fig. 1 ~ 3 are referred to, is that schematic perspective view, schematic top plan view and the section of the utility model USB charging devices are illustrated Figure, the USB charging devices that the utility model is provided mainly include：One recharging base 1, the USB charger 2 of at least more than one and The compartment seat 3 of at least more than one；The recharging base 1 has a housing 11, and the top end surface of housing 11 is provided with multiple fixations Groove 12, the bottom of fixing groove 12 is provided with the first jack 121, the second jack 122 and the 3rd jack 123 (refer to shown in Fig. 2), Wherein, second jack 122 is located between the first jack 121 and the 3rd jack 123, and the jack of the first jack 121 and the 3rd The galvanic electrode of 123 outputs is identical (can be that positive electrode or negative electrode are exported)；In addition, the plurality of fixing groove 12 can be multigroup Formula is arranged or irregular alignment, is not limited to herein.

The housing 11 is internally provided with a charging circuit substrate 4 (as shown in Figure 3), and the charging circuit substrate 4 is exchanged with one The power line 51 of plug 5 is connected (as shown in Figures 4 and 5), is used to receive the alternating current from ac plug 5, and is somebody's turn to do Charging circuit substrate 4 mainly includes：One circuit overcurrent protection 41, a current rectifying and wave filtering circuit 42, an electromagnetic interference (EMI) protection Filter circuit 43, a slow starting control circuit 44, an overvoltage checking circuit 45, a pulse width modulation (PWM) control power supply Circuit 46, a pulse width modulation (PWM) control circuit 47, a metal-oxide half field effect transistor（MOSFET）Circuit 48, one is exported Current detector circuit 49, a transformer 50 and an output rectifier and filter 52；Wherein, the circuit overcurrent protection 41 is received and handed over The ac signal of plug 5 is flowed, exchange electricity output is protected with line fault；The current rectifying and wave filtering circuit 42 and overcurrent Protection circuit 41 is electrically connected with, and the alternating current of reception is converted into direct current electricity output；The electromagnetic interference (EMI) protects filter circuit 43 is a low pass filter, is electrically connected with current rectifying and wave filtering circuit 42, is used to suppress to be incited somebody to action after high-frequency noise is electric with stable DC It is sent to transformer 50 and slow starting control circuit 44；The slow starting control circuit 44 is received protects filter circuit from EMI After 43 signal, the soft start function of pwm control circuit 47 can be provided, prevent output voltage in the non-complete stability of input direct voltage When it is also and then unstable；After the transformer 50 receives the signal of EMI protection filter circuits 43, PWM controls can be transmitted signals to Power circuit processed 46, the overvoltage checking circuit 45 and MOSFET circuits 48, the overvoltage checking circuit 45 receive transformer 50 Signal after, can controlled output voltage output voltage values, it is to avoid output voltage is too high, and the signal after treatment is sent to Pwm control circuit 47；After pulse width modulation (PWM) controlling power circuit 46 receives the signal of transformer 50, this can be provided In DC voltage to the pwm control circuit 47 of action required for pwm control circuit 47；The pulse width modulation (PWM) control electricity Road 47 receives and comes from the slow starting control circuit 44, overvoltage checking circuit 45, the PWM controlling power circuits 46 and output current The signal of checking circuit 49, in output to the MOSFET circuits 48 to control voltage and electric current stabilization；The MOSFET is brilliant Body pipe（MOSFET）Circuit 48 receives the signal from transformer 50, for controlling the output switch actuation time of transformer 50, And be electrically connected with output current checking circuit 49, make the output current checking circuit 49 can to output current with output overcurrent Detected, and testing result is sent to pwm control circuit 47, when MOSET circuits 48 order about the output direct current of transformer 50 When, the DC signal can be sent to the output rectifier and filter 52, make the output rectifier and filter 52 by transformer 50 The pulse waveform signal rectification of output is direct current electricity output；Exporting galvanic electrode includes first electrode and second electrode, its In, when the first electrode is positive electrode (Vcc), the second electrode is negative electrode (GND).Conversely, the first electrode is negative electricity During pole (GND), the second electrode is positive electrode (Vcc).

The charging circuit substrate 4 can be exported to one first electric-conductor through the direct current that output rectifier and filter 52 is exported 61st, in the second electric-conductor 62 and the 3rd electric-conductor 63, wherein, first electric-conductor 61, the second electric-conductor 62 and the 3rd electric-conductor Have on 63 respectively with the first jack 121, the second jack 122 and the corresponding location hole 611,621,631 of the 3rd jack 123, In the present embodiment, the electric-conductor 63 of the first electric-conductor 61 and the 3rd is connected with the negative electrode (GND) of charging circuit substrate 4 Connect, and second electric-conductor 62 is connected (as shown in Figure 5) with positive electrode (Vcc).

The side therein of housing 11 is provided with the AC outlet 7 of at least more than one, the AC outlet 7 with exchange The power line 51 of plug 5 is electrically connected with (refer to shown in Fig. 1 and Fig. 4), makes the exportable alternating current of AC outlet 7, for one Electronic product is used.

One surface of the USB charger 2 is provided with a USB slot 21, and a fixation projection 22 is provided with another surface, should The first conductive pole 221, the second conductive pole 222 and the 3rd conductive pole 223 are extended with fixed projection 22, and in USB charger 2 A USB circuit substrate 23 (as shown in Figure 6) is internally provided with, there is the galvanic positive electrode of output on the USB circuit substrate 23 (Vcc) and negative electrode (GND), wherein, in the present embodiment, the conductive pole 223 of the first conductive pole 221 and the 3rd with USB electricity The negative electrode (GND) of base board 23 is connected, and the second conductive pole 222 is then connected with the positive electrode (Vcc) of USB circuit substrate 23 Connect.And the positive electrode and negative electrode of USB circuit substrate 23 can be electrically connected with USB slot 21, make what USB charger 2 was received Direct current can transmit to USB slot 21 and export.

First conductive pole 221 of the USB charger 2, the conductive pole 223 of the second conductive pole 222 and the 3rd are inserted respectively In entering first jack 121, jack 123 of the second jack 122 and the 3rd of recharging base 1, and this is inserted simultaneously first lead In electric part 61, the location hole 611,621,631 of the electric-conductor 63 of the second electric-conductor 62 and the 3rd, make first conductive pole 221, The conductive pole 223 of second conductive pole 222 and the 3rd and first electric-conductor 61, the electric-conductor of the second electric-conductor 62 and the 3rd 63 are electrically connected with, by the USB slot 21 of direct current electricity output to USB charger 2；And the meeting of fixed projection 22 of the USB charger 2 Insertion is tight with the fixing groove 12 of recharging base 1, USB charger 2 is positioned on recharging base 1.

In addition, can simultaneously plug multiple USB chargers 2 on the recharging base 1, each USB charger 2 can be set different rule The USB slot 21 (as shown in Figure 1) of lattice size.

The bottom of compartment seat 3 is provided with a fixation projection 31, and the fixation projection 31 can be inserted into the fixing groove of recharging base 1 In 12, compartment seat 3 is fixed on recharging base 1, as an electronic installation against interval, and can be used as dust-proof, In avoiding foul or dust from falling into fixing groove 12.

Refer to shown in Fig. 7, be the first implementation schematic diagram of the present utility model, wherein, can first regarding the big of an electronic installation 8 Small and USB charging wires 81 length, by USB charger 2 insert on recharging base 1 be adapted to fixing groove 12 in, and by compartment seat 3 Appropriate position is inserted in, allows electronic installation 8 against positioning, or simultaneously using multiple compartments seats 3, make the electronic installation 8 can Charged with neat discharge, will not cannot be put greatly because of the size of electronic installation 8 or too, therefore, it can be applicable any size Electronic installation 8.

And first conductive pole 221 and the 3rd conductive pole 223 of the USB charger 2 and the first electric-conductor 61 and the 3rd are conductive The electrode of part 63 is all identical, therefore, the first conductive pole 221 of USB charger 2, the second conductive pole 222, the 3rd conductive pole 23 are passed through 1 first jack 121 of recharging base, first electric-conductor 61 of the second jack 122 and the insertion of the 3rd jack 123, the second electric-conductor 62 And the 3rd electric-conductor 63 location hole 611,621,631 when and it is non-directional, can arbitrarily plug, DC electrode can't be caused wrong The problem for connecing, makes user to be easy to operation.

Refer to shown in Fig. 8, be the second implementation schematic diagram of the present utility model, wherein, due to user's visible electronic device 8 Size and the length of charging wire 81 USB charger 2 and compartment seat 3 are inserted in appropriate position, therefore, in space quilt It is effective utilize under, can place the charging device 8 of more than two on the recharging base 1, and each electronic installation 8 can be according to According to size proper alignment on recharging base 1.

As shown in Figures 7 and 8, the recharging base 1 is not provided with that building blocks projection 13 can be set on the wall of fixing groove 12, makes User can carry out the assembling of building blocks after the leisure charged on wall, and a building blocks 9 can be also covered in the fixing groove 12, In addition to as dust-proof effect, can also make user by the assembling of building blocks 9, and constitute panel wall or outer wall with moulding, remove The stabilization of electronic installation 8 is put against outer, and moulded effect can be increased.

In addition, in the first conductive pole 221 of the above-mentioned USB charger 2 and the 3rd conductive pole 223 and recharging base 1 the One electric-conductor 61 and the 3rd electric-conductor 63 can also be connected with galvanic positive electrode (Vcc), and the second conductive pole 222 and second Electric-conductor 62 is then connected with negative electrode (GND), and can equally reach makes the non-directional plug in fixing groove of USB charger 2 Purpose.

Claims

1. a kind of USB charging devices, it is characterised in that including：

One recharging base, the recharging base has a housing, and the housing tip surface is provided with multiple fixing grooves, the fixing groove bottom Portion is provided with one first jack, one second jack and one the 3rd jack, and the enclosure interior is provided with a charging circuit substrate, and this fills Electric circuit substrate is connected with the power line of an ac plug, charging circuit board is received alternating current, and alternating current is turned In changing direct current electricity output to one first electric-conductor, one second electric-conductor and one the 3rd electric-conductor into, wherein, first electric-conductor, Have on second electric-conductor and the 3rd electric-conductor mutually corresponding with first jack, second jack and the 3rd jack respectively Location hole, and first electric-conductor and the 3rd electric-conductor be connected with galvanic first electrode is exported on charging circuit substrate Connect, and second electric-conductor is connected with galvanic second electrode is exported；

An at least USB charger a, surface of the USB charger is provided with a USB slot, and a fixation is provided with another surface Projection, is extended with one first conductive pole, one second conductive pole and one the 3rd conductive pole on the fixation projection, and in USB charger Be internally provided with a USB circuit substrate, there is the galvanic first electrode of output and second electrode on the USB circuit substrate, Wherein, first conductive pole and the 3rd conductive pole are connected with the first electrode of USB circuit substrate, and the second conductive pole then with The second electrode of USB circuit substrate is connected, and the first electrode and second electrode are electrically connected with USB slot simultaneously, fill USB The direct current energy that electrical equipment is received is sent to USB slot output；And the USB charger and recharging base output galvanic first Electrode is identical with the polarity of second electrode, exports the first conductive pole and the 3rd conductive pole and the first electric-conductor and the 3rd electric-conductor Galvanic electrode is identical, and the second conductive pole is identical with the second electric-conductor galvanic electrode of output；

What first conductive pole of the USB charger, second conductive pole and the 3rd conductive pole inserted recharging base respectively should In first jack, second jack and the 3rd jack, and first electric-conductor, second electric-conductor and the 3rd are inserted simultaneously In the location hole of electric-conductor, make first conductive pole, second conductive pole and the 3rd conductive pole and first electric-conductor, this Two electric-conductors and the 3rd electric-conductor are electrically connected with, by the USB slot of direct current electricity output to USB connector；And the USB Fixed block can be inserted and is tight with the fixing groove of recharging base, USB charger is positioned on recharging base.

2. USB charging devices as claimed in claim 1, it is characterised in that the charging circuit substrate mainly includes：One overcurrent Protection circuit, a current rectifying and wave filtering circuit, an emi protection filter circuit, a slow starting control circuit, an overvoltage detection Circuit, a pulse width modulation controlling power circuit, a pulse width modulation control circuit, metal-oxide half field effect transistor electricity Road, an output current checking circuit, a transformer and an output rectifier and filter；Wherein, the circuit overcurrent protection is used to Alternating current is received, and exchange electricity output is protected with line fault；The current rectifying and wave filtering circuit and circuit overcurrent protection electricity Property connection, the alternating current of reception is converted into direct current；The emi protection filter circuit is a low pass filter, is received Signal from rectifier filter, is used to suppress to be sent to after high-frequency noise and stable DC electricity the transformer and this slow is opened Dynamic control circuit；After the slow starting control circuit receives the signal from emi protection filter circuit, the pulse can be provided Width modulation control circuit soft start function, prevents output voltage also and then unstable in the non-complete stability of input direct voltage It is fixed；After the transformer receives the signal of emi protection filter circuit, pulse width modulation control can be transmitted signals to Power circuit, the overvoltage checking circuit and metal-oxide half field effect transistor circuit, the overvoltage checking circuit receive transformer After signal, the output voltage values of meeting controlled output voltage, it is to avoid output voltage is too high, and will be sent to pulse after the letter after treatment Width modulation control circuit；After the pulse width modulation controlling power circuit receives the signal of transformer, the pulse can be provided wide In DC voltage to the pulse width modulation control circuit of action required for degree modulation control circuit；The pulse width modulation is controlled Circuit is received from the slow starting control circuit, overvoltage checking circuit, the pulse width modulation controlling power circuit and this is defeated Go out the signal of current detector circuit, be used in the output voltage and electric current to metal-oxide half field effect transistor circuit for control stabilization；Should Metal-oxide half field effect transistor circuit receives the signal from transformer, for controlling the output switch actuation time of transformer, and It is electrically connected with output current detection signal, makes the output current checking circuit that output current is examined with output overcurrent Survey, and testing result is sent to pulse width modulation control circuit, to order about transformer defeated when metal-oxide half field effect transistor circuit When going out direct current, the DC signal can be sent to the output rectifier and filter, make the output rectifier and filter by transformation The pulse waveform signal rectification of device output is direct current electricity output, and exporting galvanic electrode includes first electrode and second electrode.

3. USB charging devices as claimed in claim 2, it is characterised in that when the first electrode is positive electrode, and second electrode It is negative electrode.

4. USB charging devices as claimed in claim 2, it is characterised in that when the first electrode is negative electrode, and second electrode It is positive electrode.

5. USB charging devices as claimed in claim 1, it is characterised in that on the charging circuit substrate and the USB charging substrates When the galvanic first electrode of output is negative electrode, the second electrode is positive electrode.

6. USB charging devices as claimed in claim 1, it is characterised in that on the charging circuit substrate and the USB charging substrates When the galvanic first electrode of output is positive electrode, second electrode is negative electrode.

7. USB charging devices as claimed in claim 1, it is characterised in that the wherein side of the housing of the recharging base is set There is at least one or more than one AC outlet, the AC outlet is electrically connected with the power line of ac plug, makes AC outlet can export alternating current, and supplied for electronic product is used.

8. USB charging devices as claimed in claim 1, it is characterised in that multiple USB can be simultaneously plugged on the recharging base and is filled Electrical equipment, the USB slot of each USB charger collocation different size.

9. USB charging devices as claimed in claim 1, it is characterised in that also including one or more compartment seat, should The bottom of compartment seat is provided with a fixation projection, and the fixation projection can be inserted in the fixing groove of recharging base, makes compartment seat fixed In in the fixing groove of recharging base, as an electronic installation against interval, and it is used as dust-proof, it is to avoid foul or dust In falling into fixing groove.

10. USB charging devices as claimed in claim 1, it is characterised in that the recharging base is not provided with the wall of fixing hole Building blocks projection is provided with, a building blocks can be also combined for the assembling of building blocks, and in the fixing groove of the recharging base, by building blocks Combination, and formed with moulding panel wall or outer wall, make electronic installation stabilization put against.