CN211239366U - Charging device - Google Patents
Charging device Download PDFInfo
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- CN211239366U CN211239366U CN201922006687.0U CN201922006687U CN211239366U CN 211239366 U CN211239366 U CN 211239366U CN 201922006687 U CN201922006687 U CN 201922006687U CN 211239366 U CN211239366 U CN 211239366U
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Abstract
The utility model discloses a charger, wherein, the charger includes the body and sets up the circuit board in the body, have AC-DC circuit and power management circuit on the circuit board, characterized by that, the body includes the annular groove, set up in the body surface, is used for holding the charging wire that surrounds the arrangement; a USB interface; the charging interface clamping groove is arranged on the outer surface of the shell and used for clamping and fixing a male charging interface end on a charging wire; the AC-DC circuit is used for converting an input alternating current power supply into a direct current power supply and outputting the direct current power supply to the power management circuit; and the power management circuit is used for outputting the direct current power supply output by the AC-DC circuit to a load. The utility model discloses technical scheme has promoted the reliability of charger.
Description
Technical Field
The utility model relates to a AC-DC circuit technical field, in particular to charger.
Background
In the prior art, after the charger charges some terminal equipment, the charger is generally placed at will, the charging wire of the charger is easily wound together, and in addition, the charging interface is exposed outside and is randomly placed to cause the abrasion of the charging interface. Thereby causing the reliability of the charging wire in the charging wire to be reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a charger, aim at promoting the reliability of charger.
To achieve the above object, the present invention provides a charger, the circuit board has an AC-DC circuit and a power management circuit thereon, the housing includes:
the annular groove is arranged on the outer surface of the shell and used for accommodating the charging wires which are arranged in a surrounding manner;
a USB interface;
the charging interface clamping groove is arranged on the outer surface of the shell and used for clamping and fixing a male charging interface end on a charging wire;
the AC-DC circuit is used for converting an input alternating current power supply into a direct current power supply and outputting the direct current power supply to the power management circuit;
and the power supply management circuit is used for outputting the direct current power supply output by the AC-DC circuit to a load.
Optionally, the public end of the charging interface is a Micro USB interface, a USB Type C interface, or a Lightning interface.
Optionally, the charger further comprises an indicator light.
Optionally, the AC-DC circuit includes an AC input terminal, an EMI filter circuit, a rectifier circuit, a pulse width modulation circuit, a transformer, and a power switch;
the input end of the alternating current is provided with an alternating current input positive end and an alternating current input negative end, the input end of the EMI filter circuit is connected between the alternating current input positive end and the alternating current input negative end, the output end of the EMI filter circuit is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the first end of the first primary winding of the transformer, the input end of the pulse width modulation circuit is connected with the first end of the second primary winding of the transformer, the output end of the pulse width modulation circuit is connected with the first end of the power switch, the first end of the power switch is connected with the second end of the first primary winding of the transformer, the second end of the second primary winding of the transformer is grounded, and the secondary winding of the transformer is the output end of the AC-DC circuit;
the EMI filter circuit is used for carrying out EMI filtering on the power supply input by the alternating current input end;
the rectifying circuit is used for rectifying the power supply after EMI filtering;
the pulse width modulation circuit comprises a pulse width modulation chip and is used for collecting the power supply output by the rectifying circuit, carrying out pulse width modulation on the power supply and controlling the switching-off of the power switch when the modulated power supply is greater than or equal to a preset voltage;
and the transformer is used for performing voltage reduction treatment on the rectified and output power and outputting the power to the power management circuit.
Optionally, the EMI filter circuit includes a first common mode choke, a first resistor, a second resistor, a first capacitor, and a second common mode choke;
the first winding input end of the first common mode choke is connected with the positive AC input end, the first winding output end of the first common mode choke, the first end of the first resistor, the first end of the first capacitor and the first winding input end of the second common mode choke are connected to a common point, the second winding output end of the first common mode choke is connected with the AC input negative end, the second winding input end of the first common mode choke, the second end of the second resistor, the second end of the first capacitor and the second winding output end of the second common mode choke are connected to a common point, the second end of the first resistor is connected with the first end of the second resistor, and the first winding output end of the second common mode choke coil and the second winding input end of the second common mode choke coil are output ends of the EMI filter circuit.
Optionally, the rectifying circuit includes a first diode, a second diode, a third diode, a fourth diode, a first inductor, a second capacitor, and a third capacitor;
the positive pole of the first diode is connected with the negative pole of the fourth diode and is the positive input end of the rectifying circuit, the negative pole of the first diode is connected with the negative pole of the second diode and is connected with the common end of the first inductor and the first end of the second capacitor, the positive pole of the second diode is connected with the negative pole of the third diode and is the negative input end of the rectifying circuit, the common ends of the anode of the third diode and the anode of the fourth diode are grounded, the second end of the first inductor is connected with the first end of the third capacitor and is the output end of the rectifying circuit, and the second end of the second capacitor and the second end of the third capacitor are grounded respectively.
Optionally, the value of the alternating voltage input by the alternating current input end is 100V-240V.
Optionally, the AC-DC circuit further comprises a negative temperature coefficient sensor.
Optionally, the AC-DC circuit further comprises a circuit breaker.
The utility model discloses technical scheme in the charger include the casing and set up in circuit board in the casing, AC-DC circuit and power management circuit have on the circuit board, convert the alternating current power supply of input into DC power supply through the AC-DC circuit, and the warp power management circuit exports to the load, charges for the load. In addition, through the casing includes the annular groove, and this annular groove sets up in charger casing's surface, forms the inside sunken annular groove of round charger casing for the charging wire of charger can encircle in inside sunken annular groove, has solved the charger and has been charging for the load and accomplish after, the problem that the charging wire twines together. Through the interface draw-in groove that charges that sets up on charger shell's the surface, after the charging wire encircles in the annular groove, can be fixed in the interface draw-in groove that charges with the public end card of the interface card that charges of charging wire, can understand that, the big or small shape of the interface draw-in groove that charges is unanimous with the public end of the interface that charges of charging wire, has solved the charger and has been accomplishing for the load after charging, the public end of the interface that charges on the charging wire exposes externally, the problem of the interface wearing and tearing that charges that cause. The utility model discloses technical scheme has promoted the reliability of charger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of a charger of the present invention;
fig. 2 is a schematic structural diagram of an embodiment of an AC-DC circuit in the charger of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of the AC-DC circuit in fig. 2.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
15 | Rectifying |
| 11 | |
16 | Pulse |
| 12 | Charging interface clamping groove | 17 | |
| 13 | |
18 | |
| 14 | EMI filter circuit |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a charger.
In an embodiment of the present invention, as shown in fig. 1, the charger includes a housing 10 and a circuit board disposed in the housing 10, the circuit board has an AC-DC circuit (not shown) and a power management circuit (not shown), the housing 10 includes:
the annular groove 11 is arranged on the outer surface of the shell 10 and used for accommodating charging wires arranged in a surrounding manner;
a USB interface (not shown);
the charging interface clamping groove 12 is arranged on the outer surface of the shell 10 and used for clamping and fixing a male charging interface end on a charging wire;
the AC-DC circuit is used for converting an input alternating current power supply into a direct current power supply and outputting the direct current power supply to the power management circuit;
and the power supply management circuit is used for outputting the direct current power supply output by the AC-DC circuit to a load.
In this embodiment, the annular groove 11 is arranged on the surface of the charger housing 10, specifically, is an annular groove which is recessed inwards, so that the charging wires can be placed around the annular groove, and after the charger is used up, the charging wires cannot be wound together, so that the charging wires are used again. Simultaneously in this scheme the charging wire can not be in the same place with earphone cord and other wire rod windings, can be so that the charger conveniently places.
In this embodiment, the charging interface slot 12 may be a portion that is disposed on the surface of the charger housing 10 and is close to the annular groove 11, and it can be understood that the size and the shape of the charging interface slot 12 and the size and the shape of the charging interface male end are the same, so that a user can conveniently clamp the charging interface male end on the fixed charging wire. The scheme reduces the abrasion condition of the charging interface.
In this embodiment, the AC/DC converter is a device for converting AC power into DC power, and the power flow direction may be bidirectional, and the power flow from the power source to the load is called rectification. In the scheme, an alternating current power supply input by the charger is converted into a direct current power supply to be output to the power management circuit. The power management circuit is a control circuit based on a power management technology, and the power management is how to effectively distribute power to different components of a system, so that the service life of a battery in a load is prolonged by reducing the energy consumption of the components when the components are idle.
It can be understood that the USB interface in the above embodiments is a hot-pluggable structure, the USB interface on the charger is a USB female terminal, and the USB interface male terminal at one end of the charging line can be plugged with the USB interface female terminal on the charger, so as to output the power source accessed by the charger to the load through conversion.
The utility model discloses technical scheme in the charger include casing 10 and set up in circuit board in the casing 10, AC-DC circuit and power management circuit have on the circuit board, convert the alternating current power supply of input into DC power supply through AC-DC circuit, and the warp power management circuit exports to the load, charges for the load. In addition, through the casing 10 includes the annular groove 11, this annular groove 11 sets up in the surface of charger casing 10, forms the annular groove 11 that the circle charger casing 10 inwards caves in for the charging wire of charger can encircle in the annular groove 11 inwards caves in, has solved the charger and has been charging the completion after for the load, and the problem that the charging wire twines together. Through the interface draw-in groove 12 that charges that sets up on charger shell 10's the surface, after the charging wire encircles in annular groove 11, can be fixed in the interface draw-in groove 12 that charges with the interface male end card that charges of charging wire, can understand, the big or small shape of the interface draw-in groove 12 that charges is unanimous with the interface male end that charges of charging wire, has solved the charger and after accomplishing for the load charges, the interface male end that charges on the charging wire exposes externally, the problem of the interface wearing and tearing that charges that cause. The utility model discloses technical scheme has promoted the reliability of charger.
In an embodiment, the male terminal of the charging interface is a Micro USB interface, a USB Type C interface, or a Lightning interface. It can be understood that, when the male end of the charging interface in the charger is the Micro USB interface, the size and the shape of the charging interface slot 12 on the charger are consistent with those of the Micro USB interface; when the public end of the charging interface in the charger is the USB Type C interface, the size and the shape of the charging interface card slot 12 on the charger are consistent with those of the USB Type C interface; when the public end of the charging interface in the charger is the Lightning interface, the charging interface card slot 12 on the charger is consistent with the Lightning interface in size and shape. According to the scheme, the charging interface male end in the charger can be easily fixedly clamped in the charging interface clamping groove 12, so that the charging interface male end cannot be randomly placed to cause abrasion, and the reliability of the charger is improved.
In one embodiment, the charger further comprises an indicator light. It will be appreciated that the indicator light may be an LED light to indicate that the charger is charging the load. The scheme enables the indicator lamp to prompt the charging state of the load of the user.
In one embodiment, as shown in fig. 2, the AC-DC circuit includes an AC input terminal 13, an EMI filter circuit 14, a rectifier circuit 15, a pulse width modulation circuit 16, a transformer 17, and a power switch 18;
the AC input terminal 13 has an AC input positive terminal and an AC input negative terminal, the input terminal of the EMI filter circuit 14 is connected between the AC input positive terminal and the AC input negative terminal, the output end of the EMI filter circuit 14 is connected to the input end of the rectifier circuit 15, the output of the rectifier circuit 15 is connected to a first end of a first primary winding of the transformer 17, the input of the pulse width modulation circuit 16 is connected to a first terminal of a second primary winding of the transformer 17, the output terminal of the pulse width modulation circuit 16 is connected to a first terminal of the power switch 18, the first terminal of the power switch 18 is connected to a second terminal of the first primary winding of the transformer 17, the second end of the second primary winding of the transformer 17 is grounded, and the secondary winding of the transformer 17 is the output end of the AC-DC circuit;
the EMI filter circuit 14 is configured to perform EMI filtering on the power input by the ac input terminal 13;
the rectifying circuit 15 is used for rectifying the power supply after the EMI filtering;
the pulse width modulation circuit 16 comprises a pulse width modulation chip, and the pulse width modulation circuit 16 is used for collecting the power output by the rectification circuit 15, performing pulse width modulation on the power, and controlling the power switch 18 to be switched off when the modulated power is greater than or equal to a preset voltage;
and the transformer 17 is used for performing voltage reduction processing on the rectified and output power and outputting the power to the power management circuit.
Based on the above embodiment, as shown in fig. 3, the EMI filter circuit 14 includes a first common mode choke LF1, a first resistor R1, a second resistor R2, a first capacitor C1, and a second common mode choke LF 2;
the first winding input terminal of the first common mode choke LF1 is connected to the ac input positive terminal, the first winding output terminal of the first common mode choke LF1, the first terminal of the first resistor R1, the first terminal of the first capacitor C1 and the first winding input terminal of the second common mode choke LF2 are connected to a common point, the second winding output terminal of the first common mode choke LF1 is connected to the ac input negative terminal, the second winding input terminal of the first common mode choke LF1, the second terminal of the second resistor R2, the second terminal of the first capacitor C1 and the second winding output terminal of the second common mode choke LF2 are connected to a common point, a second end of the first resistor R1 is connected to a first end of the second resistor R2, and a first winding output end of the second common mode choke LF2 and a second winding input end of the second common mode choke LF2 are output ends of the EMI filter circuit 14.
In this embodiment, the EMI filter circuit 14 is a circuit that processes interference. Further, the electromagnetic interference of the power supply is mainly power supply noise, which belongs to Radio Frequency Interference (RFI). Depending on the propagation direction, the power supply noise is divided into: one is interference to the electronic device externally generated through a power line; the other is the interference caused to the outside by the electronic equipment transmitting out through the power line. This indicates that the power supply noise is a bi-directional interference signal. Electronic equipment is both a noise interference object and a noise source. Power supply noise is classified into series mode interference and common mode interference according to the difference in formation characteristics. The series mode interference refers to noise between two power lines (line-to-line), and the common mode interference refers to noise of two power lines to the ground. In the scheme, an EMI filter circuit 14 composed of a first common mode choke coil LF1, a first resistor R1, a second resistor R2, a first capacitor C1 and a second common mode choke coil LF2 is used for carrying out EMI filtering on an alternating current power supply input in the charger so as to filter noise in the alternating current power supply.
Based on the above embodiment, as shown in fig. 3, the rectifying circuit 15 includes a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first inductor L1, a second capacitor C2, and a third capacitor C3;
an anode of the first diode D1 is connected to a cathode of the fourth diode D4 and is a positive input end of the rectifier circuit 15, a cathode of the first diode D1 is connected to a cathode of the second diode D2 and is connected to a common terminal of the first end of the first inductor L1 and the first end of the second capacitor C2, an anode of the second diode D2 is connected to a cathode of the third diode D3 and is a negative input end of the rectifier circuit 15, an anode of the third diode D3 and a common terminal of an anode of the fourth diode D4 are grounded, a second terminal of the first inductor L1 is connected to a first terminal of the third capacitor C3 and is an output end of the rectifier circuit 15, and a second terminal of the second capacitor C2 and a second terminal of the third capacitor C3 are grounded, respectively.
In this embodiment, the power output from the EMI filter circuit 14 is rectified by the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the first inductor L1, the second capacitor C2, and the third capacitor C3 included in the rectifier circuit 15, so as to convert the ac power into the dc power, and output the dc power to the transformer 17 for voltage reduction processing.
It can be understood that the second capacitor C2 and the third capacitor C3 in this scheme are polar capacitors, the first terminal of the second capacitor C2 is the positive electrode of the polar capacitor, and the second terminal of the second capacitor C2 is the negative electrode of the polar capacitor; a first end of the third capacitor C3 is a positive electrode of the polar capacitor, and a second end of the third capacitor C3 is a negative electrode of the polar capacitor;
based on the above embodiment, the pulse width modulation in the pulse width modulation circuit 16 is an analog control manner, and the bias of the base of the transistor or the gate of the MOS transistor is modulated according to the change of the corresponding load, so as to change the conduction time of the transistor or the MOS transistor, and thus change the output of the switching regulated power supply. This way the output voltage of the power supply can be kept constant when the operating conditions change, which is a very effective technique for controlling an analog circuit by means of the digital signal of the microprocessor. Pulse width modulation is a very efficient technique for controlling analog circuits using the digital output of a microprocessor. Furthermore, the control mode is to control the on-off of the switching element of the inverter circuit, so that a series of pulses with equal amplitude are obtained at the output end, and the pulses are used for replacing sine waves or required waveforms. That is, a plurality of pulses are generated in a half cycle of an output waveform, and the equivalent voltage of each pulse is a sine waveform, so that the obtained output is smooth and has few low-order harmonics. The width of each pulse is modulated according to a certain rule, so that the magnitude of the output voltage of the inverter circuit can be changed, and the output frequency can also be changed.
Based on this, the pulse width modulation circuit 16 in this embodiment may be a modulation circuit mature in the prior art, for example, a circuit as shown in fig. 3 to realize modulation of the pulse width.
In one embodiment, the value of the ac voltage input from the ac input terminal 13 is 100V-240V. It is understood that the value of the ac voltage input by the ac input terminal 13 of the charger may be 100V, 220V, 240V, etc., and is set according to the actual application scenario, and is not limited herein.
In one embodiment, as shown in FIG. 3, the AC-DC circuit further includes a negative temperature coefficient sensor. The negative temperature coefficient sensor is a thermistor phenomenon and material with a negative temperature coefficient, the resistance of which decreases exponentially along with the temperature rise, and can detect the temperature of an AC-DC circuit in the charger and prevent safety accidents caused by overhigh temperature of the charger. This scheme has promoted the security of charger.
In one embodiment, as shown in FIG. 3, the AC-DC circuit further includes a circuit breaker. It can be understood that, when the charger has a short circuit or other safety accidents, the breaker of the AC-DC circuit in the charger directly cuts off the power supply which is input to the load from the charger AC input terminal 13, so as to reduce the damage caused by the safety accidents and improve the reliability of the charger.
The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.
Claims (9)
1. A charger comprising a housing and a circuit board disposed within the housing, the circuit board having an AC-DC circuit and a power management circuit thereon, the housing comprising:
the annular groove is arranged on the outer surface of the shell and used for accommodating the charging wires which are arranged in a surrounding manner;
a USB interface;
the charging interface clamping groove is arranged on the outer surface of the shell and used for clamping and fixing a male charging interface end on a charging wire;
the AC-DC circuit is used for converting an input alternating current power supply into a direct current power supply and outputting the direct current power supply to the power management circuit;
and the power supply management circuit is used for outputting the direct current power supply output by the AC-DC circuit to a load.
2. The charger according to claim 1, wherein the male terminal of the charging interface is a Micro USB interface, a USB type C interface or a Lightning interface.
3. The charger of claim 1, wherein the charger further comprises an indicator light.
4. The charger of claim 1, wherein the AC-DC circuit comprises an AC input, an EMI filter circuit, a rectifier circuit, a pulse width modulation circuit, a transformer, and a power switch;
the input end of the alternating current is provided with an alternating current input positive end and an alternating current input negative end, the input end of the EMI filter circuit is connected between the alternating current input positive end and the alternating current input negative end, the output end of the EMI filter circuit is connected with the input end of the rectifier circuit, the output end of the rectifier circuit is connected with the first end of the first primary winding of the transformer, the input end of the pulse width modulation circuit is connected with the first end of the second primary winding of the transformer, the output end of the pulse width modulation circuit is connected with the first end of the power switch, the first end of the power switch is connected with the second end of the first primary winding of the transformer, the second end of the second primary winding of the transformer is grounded, and the secondary winding of the transformer is the output end of the AC-DC circuit;
the EMI filter circuit is used for carrying out EMI filtering on the power supply input by the alternating current input end;
the rectifying circuit is used for rectifying the power supply after EMI filtering;
the pulse width modulation circuit comprises a pulse width modulation chip and is used for collecting the power supply output by the rectifying circuit, carrying out pulse width modulation on the power supply and controlling the switching-off of the power switch when the modulated power supply is greater than or equal to a preset voltage;
and the transformer is used for performing voltage reduction treatment on the rectified and output power and outputting the power to the power management circuit.
5. The charger of claim 4, wherein the EMI filtering circuit comprises a first common mode choke, a first resistor, a second resistor, a first capacitor, and a second common mode choke;
the first winding input end of the first common mode choke is connected with the positive AC input end, the first winding output end of the first common mode choke, the first end of the first resistor, the first end of the first capacitor and the first winding input end of the second common mode choke are connected to a common point, the second winding output end of the first common mode choke is connected with the AC input negative end, the second winding input end of the first common mode choke, the second end of the second resistor, the second end of the first capacitor and the second winding output end of the second common mode choke are connected to a common point, the second end of the first resistor is connected with the first end of the second resistor, and the first winding output end of the second common mode choke coil and the second winding input end of the second common mode choke coil are output ends of the EMI filter circuit.
6. The charger of claim 4, wherein the rectifying circuit comprises a first diode, a second diode, a third diode, a fourth diode, a first inductor, a second capacitor, and a third capacitor;
the positive pole of the first diode is connected with the negative pole of the fourth diode and is the positive input end of the rectifying circuit, the negative pole of the first diode is connected with the negative pole of the second diode and is connected with the common end of the first inductor and the first end of the second capacitor, the positive pole of the second diode is connected with the negative pole of the third diode and is the negative input end of the rectifying circuit, the common ends of the anode of the third diode and the anode of the fourth diode are grounded, the second end of the first inductor is connected with the first end of the third capacitor and is the output end of the rectifying circuit, and the second end of the second capacitor and the second end of the third capacitor are grounded respectively.
7. The charger according to claim 4, wherein the ac voltage input from the ac input terminal has a value of 100V to 240V.
8. The charger according to any one of claims 4-7, wherein the AC-DC circuit further comprises a negative temperature coefficient sensor.
9. The charger according to any one of claims 4-7, wherein the AC-DC circuit further comprises a circuit breaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006687.0U CN211239366U (en) | 2019-11-19 | 2019-11-19 | Charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922006687.0U CN211239366U (en) | 2019-11-19 | 2019-11-19 | Charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211239366U true CN211239366U (en) | 2020-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922006687.0U Active CN211239366U (en) | 2019-11-19 | 2019-11-19 | Charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211239366U (en) |
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2019
- 2019-11-19 CN CN201922006687.0U patent/CN211239366U/en active Active
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