CN-224218142-U - Charging circuit of low-cost intelligent sound equipment

CN224218142UCN 224218142 UCN224218142 UCN 224218142UCN-224218142-U

Abstract

The utility model discloses a low-cost charging circuit of an intelligent sound box, which comprises a charging control circuit, a first switching tube circuit, a second switching tube circuit and a third switching tube circuit, wherein the first switching tube circuit is electrically connected with the charging control circuit, a storage battery and a charging power supply, the first switching tube circuit is also electrically connected with the second switching tube circuit, the second switching tube circuit is also electrically connected with the third switching tube circuit, and the third switching tube circuit is also respectively electrically connected with the charging power supply and the charging control circuit. Through setting up first switching tube circuit, second switching tube circuit, third switching tube circuit to control the switch that charges according to the voltage condition of battery, and need set up independent equipment detection switch in place, solved current intelligent sound equipment and need set up an equipment detection switch in place alone, lead to intelligent sound cost to rise, and still influence the outward appearance and the problem of structure of product.

Inventors

HE SHIHONG
WEI NING
LIANG YONGZHI

Assignees

深圳市奋达科技股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250508

Claims (10)

1. A charging circuit of a low-cost intelligent audio device, comprising: a charge control circuit; a first switching tube circuit; a second switching tube circuit; A third switching tube circuit; the first switching tube circuit is electrically connected with the charging control circuit, the storage battery and the charging power supply; The first switching tube circuit is also electrically connected with the second switching tube circuit; the second switching tube circuit is also electrically connected with the third switching tube circuit; The third switching tube circuit is also electrically connected with the charging power supply and the charging control circuit respectively; The first switching tube circuit is used for inputting a first level signal to the second switching tube circuit so as to control the switch of the second switching tube circuit; The second switching tube circuit is used for inputting a second level signal to the third switching tube circuit so as to control the switch of the third switching tube circuit; The third switching tube circuit is used for controlling the switch of the charging control circuit.
2. The low cost smart audio charging circuit of claim 1, wherein the first switching tube circuit comprises: the first triode, the first current limiting resistor, the second current limiting resistor and the first filter capacitor; The first end of the first current limiting resistor is electrically connected with the anode of the storage battery, and the second end of the first current limiting resistor is electrically connected with the base electrode of the first triode and the first end of the second current limiting resistor; The second end of the second current limiting resistor, the emitter of the first triode and the first end of the first filter capacitor are electrically connected, and the second end of the first filter capacitor is grounded.
3. The low cost smart audio charging circuit of claim 2, wherein the first switching tube circuit further comprises: the third current limiting resistor, the first voltage dividing resistor and the second voltage dividing resistor; The first end of the third current limiting resistor is electrically connected with the charging power supply, and the second end of the third current limiting resistor is commonly connected with the second end of the second current limiting resistor, the emitter of the first triode, the first end of the first filter capacitor and the first end of the first divider resistor; The second end of the first voltage dividing resistor is electrically connected with the first end of the second voltage dividing resistor, and the second end of the second voltage dividing resistor is grounded.
4. The low cost intelligent audio charging circuit of claim 1, wherein the second switching tube circuit comprises: the second triode, the fourth current limiting resistor and the fifth current limiting resistor; The base electrode of the second triode is electrically connected with the collector electrode of the first triode through the fourth current limiting resistor, and the emitter electrode of the second triode is grounded; And the collector electrode of the second triode is electrically connected with the first end of the fifth current limiting resistor.
5. The low cost intelligent audio charging circuit of claim 1, wherein the third switching tube circuit comprises: MOS tube and sixth current limiting resistor; the grid electrode of the MOS tube and the first end of the sixth current limiting resistor are connected with the second end of the fifth current limiting resistor; The second end of the sixth current limiting resistor is commonly connected with the charging power supply and the source electrode of the MOS tube; and the drain electrode of the MOS tube is electrically connected with the charging control circuit.
6. The low cost smart audio charging circuit of claim 1, wherein the charging control circuit comprises: The charging circuit comprises a charging chip, a first filter circuit, a second filter circuit and a first voltage dividing circuit; The first end of the first filter circuit, the first end of the second filter circuit, the first end of the first voltage dividing circuit, the input pin of the charging chip and the drain electrode of the MOS tube are connected together; the second end of the first filter circuit, the second end of the second filter circuit and the second end of the first voltage dividing circuit are grounded.
7. The low cost smart audio charging circuit of claim 6, wherein the first voltage divider circuit comprises: a third voltage dividing resistor and a fourth voltage dividing resistor; The first end of the third voltage dividing resistor is commonly connected with the first end of the first filter circuit, the first end of the second filter circuit, the input pin of the charging chip and the drain electrode of the MOS tube; The first end of the third voltage dividing resistor is electrically connected with the first end of the fourth voltage dividing resistor, and the second end of the fourth voltage dividing resistor is grounded.
8. The low-cost intelligent audio charging circuit according to claim 6, wherein the first filter circuit and the second filter circuit respectively comprise a second filter capacitor and a third filter capacitor; The first end of the second filter capacitor and the first end of the third filter capacitor are connected with the first voltage dividing circuit, the input pin of the charging chip and the drain electrode of the MOS tube; The second end of the second filter capacitor and the second end of the third filter capacitor are respectively grounded.
9. The low cost smart audio charging circuit of claim 6, wherein the charging control circuit further comprises: a third filter circuit; The first end of the third filter circuit is electrically connected with the output pin of the charging chip, and the second end of the first filter circuit is grounded.
10. The low-cost intelligent audio charging circuit according to claim 9, wherein, The third filter circuit includes: a fourth filter capacitor; The first end of the fourth filter capacitor is electrically connected with the output pin of the charging chip, and the second end of the fourth filter capacitor is grounded.

Description

Charging circuit of low-cost intelligent sound equipment Technical Field The utility model relates to the technical field of intelligent sound charging, in particular to a charging circuit of an intelligent sound with low cost. Background When the storage battery of electronic equipment such as sound equipment is charged, the equipment plays an important role in the in-situ detection switch in the process of charging the storage battery, and the connection state of the equipment is detected, namely, the equipment is used for judging whether the storage battery is correctly connected to the charging equipment. When the storage battery is well connected with the charging equipment, the detection switch is closed, the equipment is in place, the charging circuit can work normally, and if the connection is poor or the connection is not made, the switch is opened, the charging equipment cannot start charging, so that faults caused by incorrect operation or the connection are avoided. The misoperation prevention can prevent the misoperation of the charging equipment under the condition that the storage battery is not installed or connected correctly, the charging equipment and the storage battery are prevented from being damaged, and meanwhile, the safety of operators is also ensured. The common in-place detection switch is provided with a mechanical micro switch, and the switch is triggered by the mechanical action when the storage battery is connected with the charging equipment. For example, when the battery is inserted into the charging stand, the housing presses the button of the micro switch to close the switch, and the charging device starts to operate after detecting the bit signal. And the magnetic induction switch is characterized in that a magnet and a magnetic sensor are respectively arranged on the storage battery and the charging equipment. When the storage battery is close to the charging equipment and is correctly aligned, the magnetic field of the magnet triggers the magnetic sensor to enable the switch to act, so that the charging equipment is informed that the storage battery is in place. But a single in-place detection switch is arranged, so that the appearance and the structure of the intelligent sound equipment are affected, and the cost of the product is increased. Disclosure of Invention In the prior art, when the storage battery of the intelligent sound equipment is charged, an equipment in-place detection switch is required to be arranged independently, so that the cost of the intelligent sound equipment is increased, and the appearance and the structure of a product are also influenced. To above-mentioned problem, propose the charging circuit of a kind of low-cost intelligent stereo set, through setting up first switching tube circuit, second switching tube circuit, third switching tube circuit to control the switch that charges according to the voltage condition of battery, and need set up independent equipment and detect the switch on site, solved current intelligent stereo set and need set up an equipment on site to detect the switch alone, lead to intelligent stereo set cost to rise, and still influence the problem of outward appearance and structure of product. A charging circuit of a low cost intelligent audio device, comprising: a charge control circuit; a first switching tube circuit; a second switching tube circuit; A third switching tube circuit; the first switching tube circuit is electrically connected with the charging control circuit, the storage battery and the charging power supply; The first switching tube circuit is also electrically connected with the second switching tube circuit; the second switching tube circuit is also electrically connected with the third switching tube circuit; The third switching tube circuit is also electrically connected with a charging power supply and the charging control circuit respectively; The first switching tube circuit is used for inputting a first level signal to the second switching tube circuit so as to control the switch of the second switching tube circuit; The second switching tube circuit is used for inputting a second level signal to the third switching tube circuit so as to control the switch of the third switching tube circuit; The third switching tube circuit is used for controlling the switch of the charging control circuit. In combination with the low-cost charging circuit of the intelligent audio system of the present utility model, in a first possible implementation manner, the first switching tube circuit includes: the first triode, the first current limiting resistor, the second current limiting resistor and the first filter capacitor; The first end of the first current limiting resistor is electrically connected with the anode of the storage battery, and the second end of the first current limiting resistor is electrically connected with the base electrode of the first triode and the first end of the second current l