CN112666382A

CN112666382A - Charging current testing device of earphone and/or charging box

Info

Publication number: CN112666382A
Application number: CN202011391505.7A
Authority: CN
Inventors: 李魁伦; 黎荣滨
Original assignee: Cosonic Intelligent Technologies Co Ltd
Current assignee: Cosonic Intelligent Technologies Co Ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-04-16

Abstract

The invention discloses a charging current testing device of an earphone and/or a charging box, which comprises an AC power line and a case, wherein an AC/DC current converter, a digital display voltmeter, a first digital display ammeter, a second digital display ammeter and at least one USB charging socket are arranged on the case; one end of the AC power line is used for connecting a mains supply, and the other end of the AC power line is plugged with an AC/DC current converter; the AC/DC current converter is used for converting commercial power into 5V direct current for output; the digital display voltmeter is used for detecting the voltage of the output end of the AC/DC current converter; USB charges the socket and is used for the USB joint power cord of grafting earphone and/or the box that charges, USB charges the socket and has two sets of charging lines, and wherein the charging current of a set of charging line is detected by first digital display ampere meter, and the charging current of another group of charging line is detected by second digital display ampere meter. The invention can reduce the cost of the device, improve the working efficiency, improve the test accuracy, reduce the misjudgment and reduce the working fatigue.

Description

Charging current testing device of earphone and/or charging box

Technical Field

The invention relates to the technical field of testing equipment of earphones and/or charging boxes, in particular to a charging current testing device of the earphones and/or the charging boxes.

Background

At present, the type of earphone usually includes the type such as true wireless bluetooth headset, neck-wearing bluetooth headset, wear bluetooth headset, and the earphone of these types all needs to charge before using, and neck-wearing bluetooth headset and wear bluetooth headset generally are direct to charge through USB joint power cord, and true wireless bluetooth headset then disposes the box that charges, places true wireless bluetooth headset in the box that charges earlier, then inserts USB joint power cord with the box that charges, charges the true wireless bluetooth headset in the box that charges. The earphone and/or the charging box are required to have constant voltage and current in the charging process, for example, the common real wireless Bluetooth earphone and the charging box are charged by adopting direct current of 5V and 3A.

The headset and/or the charging box require testing of the charging current during the manufacturing process. In the prior art, when testing the charging current of the earphone and/or the charging box, a direct current voltage regulator and two multimeters are needed by staff, the staff needs to carefully watch the two current meters and the one voltmeter, and the staff compares the data with a standard value to judge: whether the charging current of the headset and/or the charging box is qualified. However, the conventional charging current testing device and method have the following disadvantages: (1) the cost is high, the weight is heavy, and a direct current voltage stabilizing source and two universal meters are needed; (2) low efficiency, easy error and no fool-proof function; (3) when using the universal meter test pen, the staff also need to see the comparison standard of three meter readings to judge whether qualified, easy tired, easy erroneous judgement. Therefore, there is a need for a charging current testing device that can reduce cost, improve efficiency, reduce erroneous determination, and reduce fatigue.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a charging current testing device for an earphone and/or a charging box, which can reduce the cost of the device, improve the working efficiency, improve the testing accuracy, reduce the misjudgment, and reduce the working fatigue, in view of the deficiencies of the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows: a charging current testing device of an earphone and/or a charging box comprises an AC power line and a case, wherein an AC/DC current converter, a digital display voltmeter, a first digital display ammeter, a second digital display ammeter and at least one USB charging socket are mounted on the case; one end of the AC power line is used for connecting a mains supply, and the other end of the AC power line is plugged with an AC/DC current converter; the AC/DC current converter is used for converting commercial power into 5V direct current for output; the digital display voltmeter is used for detecting the voltage of the output end of the AC/DC current converter; USB charges the socket and is used for the USB joint power cord of grafting earphone and/or the box that charges, USB charges the socket and has two sets of charging lines, and wherein the charging current of a set of charging line is detected by first digital display ampere meter, and the charging current of another group of charging line is detected by second digital display ampere meter.

Preferably, the input end of the AC/DC current converter is provided with a power switch, the output end of the AC/DC current converter comprises a VCC end and a GND end, and the GND end and the ground end are connected in series with a fuse.

Preferably, the digital display voltmeter comprises a VCC end, a GND end, an IN-end and an IN + end, the VCC end and the IN + end of the digital display voltmeter are respectively and electrically connected with the VCC end of the AC/DC current converter, and the GND end and the IN-end of the digital display voltmeter are respectively and electrically connected with the GND end of the AC/DC current converter.

Preferably, the USB charging socket includes a 1 st pin, a 2 nd pin, a 3 rd pin and a 4 th pin; the No. 2 pin and the No. 4 pin of the USB socket that charges are connected with the VCC end electricity of AC/DC current converter respectively, and the No. 1 pin electricity of the USB socket that charges is connected any one digital display ampere meter in first digital display ampere meter or the second digital display ampere meter, and the No. 3 pin electricity of the USB socket that charges is connected another digital display ampere meter.

Preferably, the first digital display ammeter comprises a GND end, a VCC end, an IN-end and an IN + end, the GND end and the IN-end of the first digital display ammeter are respectively and electrically connected with the GND end of the AC/DC current converter, the VCC end of the first digital display ammeter is electrically connected with the VCC end of the AC/DC current converter, and the IN + end of the first digital display ammeter is electrically connected with the No. 1 pin or the No. 3 pin of the USB charging socket; the second digital display ammeter also comprises a GND end, a VCC end, an IN-end and an IN + end, the GND end and the IN-end of the second digital display ammeter are respectively electrically connected with the GND end of the AC/DC current converter, the VCC end of the second digital display ammeter is electrically connected with the VCC end of the AC/DC current converter, and the IN + end of the second digital display ammeter is electrically connected with the 1 st pin or the 3 rd pin of the USB charging socket.

Preferably, the USB charging socket comprises a first USB charging socket and a second USB charging socket, the IN + end of the first digital display ammeter is electrically connected with the 1 st pin of the first USB charging socket and the 3 rd pin of the second USB charging socket respectively, and the IN + end of the second digital display ammeter is electrically connected with the 3 rd pin of the first USB charging socket and the 1 st pin of the second USB charging socket respectively.

The invention has the beneficial effects that: the invention integrates the AC/DC current converter, the digital display voltmeter, the first digital display ammeter and the second digital display ammeter into the case, so that the cost of the whole device can be reduced, and at least one USB charging socket is arranged on the case for plugging a USB connector power line of an earphone and/or a charging box, so that the operation of staff is facilitated, the working efficiency of the staff is improved, the testing accuracy is improved, and the working fatigue is reduced; secondly, the required 5V direct current is obtained after 220V alternating current is rectified, filtered and reduced in voltage through an AC/DC current converter, a digital display voltmeter detects the voltage of the output end of the AC/DC current converter, whether the output voltage is within the range of the required normal voltage of a product or not is detected, and an alarm is sent when the voltage is too high or too low, so that the working voltage is ensured to be stable and consistent; thirdly, the USB charging socket of the invention is provided with two groups of charging circuits, wherein the charging current of one group of charging circuits is detected by a first digital display ammeter, the charging current of the other group of charging circuits is detected by a second digital display ammeter, for the earphone type with left and right earphones (e.g., true wireless bluetooth earphones), one USB charging socket can suffice for simultaneous detection of the charging current for the left and right earphones, the two digital display ammeters are used for respectively detecting, the two digital display ammeters form a visual display test data and a judgment basis, the charging current generated when the earphone and/or the charging box product is connected into the charging circuit can be displayed through the two digital display ammeters, the digital display ammeter is used for setting the standard numerical values of the upper and lower limits of the current, and the alarm prompt can be sent when the current is too high or too low, so that the test misjudgment is prevented, and the bad outflow is avoided. In addition, in a preferred mode of the invention, the AC/DC current converter is provided with a power switch, the fuse automatically cuts off the power supply when voltage transient occurs, the safety factor is high, and the AC/DC current converter has the function of an automatic protection circuit. IN a preferred mode of the invention, the USB charging socket comprises a first USB charging socket and a second USB charging socket, the IN + end of the first digital display ammeter is electrically connected to the 1 st pin of the first USB charging socket and the 3 rd pin of the second USB charging socket respectively, and the IN + end of the second digital display ammeter is electrically connected to the 3 rd pin of the first USB charging socket and the 1 st pin of the second USB charging socket respectively, so that when the first USB charging socket tests that the charging current is abnormal, the charging current can be replaced to the second USB charging socket to test the charging current again, and thus the abnormality of the charging current can be confirmed twice through the two digital display ammeters, so as to further improve the test accuracy and reduce the misjudgment.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a circuit diagram of the present invention.

In the figure: an AC power cord; 2. a chassis; an AC/DC current converter; 4. a digital display voltmeter; 5. a first digital display ammeter; 6. a second digital display ammeter; 7. a first USB charging socket; 8. a second USB charging socket; 9. a power switch; 10. a fuse is provided.

Detailed Description

The structural and operational principles of the present invention are explained in further detail below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the present invention is a charging current testing device for an earphone and/or a charging box, comprising an AC power line 1 and a case 2, wherein the case 2 is provided with an AC/DC current converter 3, a digital display voltmeter 4, a first digital display ammeter 5, a second digital display ammeter 6 and at least one

USB charging socket

7, 8; one end of the AC power line 1 is used for connecting commercial power, and the other end of the AC power line is plugged with an AC/DC current converter 3; the AC/DC current converter 3 is used for converting commercial power into 5V direct current for output; the digital display voltmeter 4 is used for detecting the voltage of the output end of the AC/DC current converter 3;

USB charges socket

7, 8 and is used for the USB joint power cord (not shown in the figure) of grafting earphone and/or the box that charges,

USB charges socket

7, 8 and has two sets of charging lines, and wherein the charging current of a set of charging line is detected by first digital display ampere meter 5, and the charging current of another set of charging line is detected by second digital display ampere meter 6.

The charging current detection method of the earphone and/or the charging box comprises the following steps: one end of the AC power line is inserted into a mains supply, the other end of the AC power line is inserted into the AC/DC current converter, then the USB joint power line of the earphone and/or the charging box is inserted into the USB charging socket, and the charging current of the earphone and/or the charging box can be tested. The alternating current 220V mains supply is rectified, filtered and reduced in voltage by the AC/DC current converter to obtain required 5V direct current, the digital display voltmeter is used for detecting the voltage of the output end of the AC/DC current converter, whether the output voltage is within the range of the required normal voltage of a product or not is detected, and an alarm is sent when the voltage is too high or too low, so that the working voltage is ensured to be stable and consistent; USB socket that charges has two sets of charging lines, wherein the charging current of a set of charging line is detected by first digital display ampere meter, the charging current of another set of charging line is detected by second digital display ampere meter, to the earphone type (for example true wireless bluetooth headset) that has left earphone and right earphone, a USB socket that charges can satisfy the charging current simultaneous detection to left earphone and right earphone, detect respectively through two digital display ampere meters, two digital display ampere meters constitute a visual display test data and judge the basis, earphone and/or the box product that charges insert produced charging circuit in the charging current can all show through two digital display ampere meters, set up the upper and lower limit standard value of electric current through the digital display ampere meter, the electric current is too high or the low warning that can send out excessively, prevent the test misjudgement, stop bad outflow. The current testing device can be used for detecting various abnormal defects such as no charging/low electric quantity/unstable current of the earphone and/or the charging box at the current testing station of the earphone and/or the charging box.

As shown in fig. 1 and 2, the input end of the AC/DC current converter is provided with a power switch 9, the output end of the AC/DC current converter includes a VCC end and a GND end, and the GND end and the ground end are connected in series with a fuse 10. The AC/DC current converter is provided with a power switch, the fuse 10 automatically cuts off the power supply when voltage transient occurs, the safety factor is high, and the automatic protection circuit function is achieved. The digital display voltmeter comprises a VCC end, a GND end, an IN-end and an IN + end, the VCC end and the IN + end of the digital display voltmeter 4 are respectively electrically connected with the VCC end of the AC/DC current converter 3, and the GND end and the IN-end of the digital display voltmeter 4 are respectively electrically connected with the GND end of the AC/DC current converter.

As shown in fig. 1 and 2, the

USB charging sockets

7 and 8 include a 1 st pin, a 2 nd pin, a 3 rd pin and a 4 th pin; the No. 2 pin and the No. 4 pin of the

USB charging sockets

7 and 8 are respectively electrically connected with a VCC end of the AC/DC current converter 3, the No. 1 pin of the

USB charging sockets

7 and 8 is electrically connected with any one digital display ammeter in the first digital display ammeter 5 or the second digital display ammeter 6, and the No. 3 pin of the

USB charging sockets

7 and 8 is electrically connected with the other digital display ammeter, namely, when the No. 1 pin is electrically connected with the first digital display ammeter 5, the No. 3 pin is electrically connected with the second digital display ammeter; when the No. 1 pin is electrically connected with the second digital display ammeter 5, the No. 3 pin is electrically connected with the first digital display ammeter.

As shown IN fig. 1 and 2, the first digital display ammeter 5 includes a GND terminal, a VCC terminal, an IN-terminal and an IN + terminal, the GND terminal and the IN-terminal of the first digital display ammeter 5 are respectively electrically connected to the GND terminal of the AC/DC current converter 3, the VCC terminal of the first digital display ammeter 5 is electrically connected to the VCC terminal of the AC/DC current converter 3, and the IN + terminal of the first digital display ammeter 5 is electrically connected to the 1 st pin or the 3 rd pin of the

USB charging socket

7 or 8; the second digital display ammeter 6 also comprises a GND end, a VCC end, an IN-end and an IN + end, the GND end and the IN-end of the second digital display ammeter 6 are respectively electrically connected with the GND end of the AC/DC current converter 3, the VCC end of the second digital display ammeter 6 is electrically connected with the VCC end of the AC/DC current converter 3, and the IN + end of the second digital display ammeter 6 is electrically connected with the 1 st pin or the 3 rd pin of the

USB charging socket

7 or 8.

As shown IN fig. 1 and fig. 2, IN the embodiment of the present invention, the USB charging socket includes a first USB charging socket 7 and a second USB charging socket 8, an IN + terminal of the first digital display ammeter 5 is electrically connected to a 1 st pin of the first USB charging socket 7 and a 3 rd pin of the second USB charging socket, respectively, and an IN + terminal of the second digital display ammeter 6 is electrically connected to a 3 rd pin of the first USB charging socket 7 and a 1 st pin of the second USB charging socket 8, respectively. Test examples: the method comprises the steps that a true wireless Bluetooth headset with a left headset and a right headset is placed in a charging box, a USB connector power line of the charging box is firstly plugged in a first USB charging socket 7, at the moment, a pin 1 and a pin 2 of the first USB charging socket charge the left headset, a first digital display ammeter tests charging current of the left headset, a pin 3 and a pin 4 of the first USB charging socket charge the right headset, and a second digital display ammeter tests charging current of the right headset; if the charging current of the left earphone tested by the first digital display ammeter is found to be abnormal in the testing process, a worker inserts a USB connector power line of the charging box into the second USB charging socket 8, at the moment, the 1 st pin and the 2 nd pin of the second USB charging socket still charge the left earphone and convert the pins into the charging current of the left earphone to be tested by the second digital display ammeter, the 3 rd pin and the 4 th pin of the second USB charging socket still charge the right earphone and convert the pins into the charging current of the right earphone to be tested by the first digital display ammeter, and therefore the abnormal problem of the charging current of the left earphone can be confirmed again by the second digital display ammeter; the charging current of the left earphone is tested twice through the first digital display ammeter and the second digital display ammeter, so that errors caused by the problems of the factor display ammeter can be avoided, and the testing accuracy is further improved.

The above description is only a preferred embodiment of the present invention, and all the minor modifications, equivalent changes and modifications made to the above embodiment according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1.A charging current testing arrangement of earphone and/or box that charges which characterized in that: the intelligent charging system comprises an AC power line and a case, wherein an AC/DC current converter, a digital display voltmeter, a first digital display ammeter, a second digital display ammeter and at least one USB charging socket are mounted on the case; one end of the AC power line is used for connecting a mains supply, and the other end of the AC power line is plugged with an AC/DC current converter; the AC/DC current converter is used for converting commercial power into 5V direct current for output; the digital display voltmeter is used for detecting the voltage of the output end of the AC/DC current converter; USB charges the socket and is used for the USB joint power cord of grafting earphone and/or the box that charges, USB charges the socket and has two sets of charging lines, and wherein the charging current of a set of charging line is detected by first digital display ampere meter, and the charging current of another group of charging line is detected by second digital display ampere meter.

2. A charging current testing device of a headset and/or a charging box according to claim 1, characterized in that: the input end of the AC/DC current converter is provided with a power switch, the output end of the AC/DC current converter comprises a VCC end and a GND end, and the GND end and the grounding end are connected in series with a fuse.

3.A charging current testing device of a headset and/or a charging box according to claim 2, characterized in that: the digital display voltmeter comprises a VCC end, a GND end, an IN-end and an IN + end, the VCC end and the IN + end of the digital display voltmeter are respectively electrically connected with the VCC end of the AC/DC current converter, and the GND end and the IN-end of the digital display voltmeter are respectively electrically connected with the GND end of the AC/DC current converter.

4. A charging current testing device of a headset and/or a charging box according to claim 2, characterized in that: the USB charging socket comprises a 1 st pin, a 2 nd pin, a 3 rd pin and a 4 th pin; the No. 2 pin and the No. 4 pin of the USB socket that charges are connected with the VCC end electricity of AC/DC current converter respectively, and the No. 1 pin electricity of the USB socket that charges is connected any one digital display ampere meter in first digital display ampere meter or the second digital display ampere meter, and the No. 3 pin electricity of the USB socket that charges is connected another digital display ampere meter.

5. A charging current testing arrangement for a headset and/or a charging box according to claim 4, characterized in that: the first digital display ammeter comprises a GND end, a VCC end, an IN-end and an IN + end, the GND end and the IN-end of the first digital display ammeter are respectively and electrically connected with the GND end of the AC/DC current converter, the VCC end of the first digital display ammeter is electrically connected with the VCC end of the AC/DC current converter, and the IN + end of the first digital display ammeter is electrically connected with the No. 1 pin or the No. 3 pin of the USB charging socket; the second digital display ammeter also comprises a GND end, a VCC end, an IN-end and an IN + end, the GND end and the IN-end of the second digital display ammeter are respectively electrically connected with the GND end of the AC/DC current converter, the VCC end of the second digital display ammeter is electrically connected with the VCC end of the AC/DC current converter, and the IN + end of the second digital display ammeter is electrically connected with the 1 st pin or the 3 rd pin of the USB charging socket.

6. A charging current testing arrangement for a headset and/or a charging box according to claim 5, characterized in that: the USB socket that charges includes that first USB charges the socket and the second USB charges the socket, the IN + end of first digital display ampere meter charges the 1 st pin of socket, the 3 rd pin electricity of the socket that charges of second USB respectively with first USB and is connected, the IN + end of second digital display ampere meter charges the 3 rd pin of socket, the 1 st pin electricity of the socket that charges of second USB with first USB respectively and is connected.