CN211068607U

CN211068607U - Circular cloth wrapping music sleeping instrument player

Info

Publication number: CN211068607U
Application number: CN201920728709.1U
Authority: CN
Inventors: 黄送庭
Original assignee: Shenzhen Rundonglai Technology Co ltd
Current assignee: Shenzhen Rundonglai Technology Co ltd
Priority date: 2019-05-20
Filing date: 2019-05-20
Publication date: 2020-07-24
Anticipated expiration: 2029-05-20

Abstract

The utility model discloses a circular cloth music sleep appearance player of wrapping up in, including face lid and back lid, the outside parcel of face lid wraps up in cloth, and the middle part of wrapping up in cloth is equipped with the plated item, the plated item is covered with the face and is equipped with the recess phase-match, and the plated item gomphosis is installed in the recess, the inboard installation of face lid is covered in and is installed the loudspeaker stereo set, the inboard gomphosis installation loudspeaker of loudspeaker stereo set, the outside installation loudspeaker casting die of loudspeaker stereo set, installation vibrations piece between loudspeaker stereo set and the loudspeaker casting die, the inboard installation button PCB board of back lid, main PCB board and battery casting die. This circular cloth music sleep appearance player of wrapping up in, the user can press the function button as required to the size and the settlement of broadcast time of the music of broadcast selection, volume, the switching of music between accessible plug earphone realization player and cell-phone/computer moreover makes things convenient for people to use, helps people to fall asleep and improves the sleep quality.

Description

Circular cloth wrapping music sleeping instrument player

Technical Field

The utility model relates to a help dormancy equipment technical field specifically is a circular cloth music sleep appearance player of wrapping up in.

Background

With the acceleration of life rhythm and the increase of pressure, more and more people can not fall asleep at night, so that serious insomnia symptoms occur, and the problems of poor concentration, hypomnesis and working efficiency occur in work; therefore, there is a need for a device that helps people fall asleep and improves sleep quality.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a circular cloth music sleep appearance player of wrapping up in, the user can press the function button according to required, thereby the music of selecting is played, the size of volume and the settlement of broadcast time, and the switching of music between player and cell-phone computer is realized to accessible plug earphone, thereby make things convenient for people to use, help people fall asleep and improve the sleep quality, make people can keep long-time concentration power at work, have the advantage of improving memory, improve work efficiency, the problem among the prior art has been solved.

In order to achieve the above object, the utility model provides a following technical scheme: a circular cloth wrapping music sleeping instrument player comprises a face cover and a rear cover, wherein wrapping cloth is wrapped on the outer side of the face cover, an electroplating piece is arranged in the middle of the wrapping cloth, the electroplating piece is matched with a groove arranged on the face cover, the electroplating piece is embedded and installed in the groove, a middle cover is installed on the inner side of the face cover, a loudspeaker sound box is installed on the middle cover, a loudspeaker is embedded and installed on the inner side of the loudspeaker sound box, a loudspeaker pressing piece is installed on the outer side of the loudspeaker sound box, a vibration piece is installed between the loudspeaker sound box and the loudspeaker pressing piece, a key PCB, a main PCB and a battery pressing piece are installed on the inner side of the rear cover, a function key, a starting lamp accessory and a timing lamp accessory are installed on the key PCB, the function key is matched with a key hole arranged on the rear cover, one end of the function key is inserted into the key hole, the starting lamp accessory and the timing lamp accessory are respectively matched with a lamp hole arranged on the rear cover, the, the battery pressing piece is arranged on the inner side of the battery pressing piece, the support pressing piece is arranged on the outer side of the rear cover, the support is movably arranged at one end of the support pressing piece through a rotating shaft, and the anti-skid pad is further arranged at the bottom outside the rear cover.

Preferably, a key circuit and an L ED lamp circuit are arranged in the key PCB board, and a main control circuit, an F L ASH circuit, a power amplifier circuit, a L INEIN circuit, an earphone circuit and a charging circuit are arranged in the main PCB board.

Preferably, the key circuit comprises a volume down key SW1, a volume up key SW2, an up key SW3, a down key SW4, a timing switch key SW5, a MOS transistor Q1 and a triode Q2, wherein;

the timing switch key SW5 is connected with the +3V3 voltage after being connected with the diode D5, the resistor R21 and the resistor R10 in series; the down-turning key SW4 is connected in series with the resistor R17 and then connected in parallel with the two ends of the timing switch key SW5 and the resistor R21; the flip-up key SW3 is connected in series with the resistor R15 and then connected in parallel with the two ends of the flip-down key SW4 and the resistor R17; the volume up key SW2 is connected in series with the resistor R13 and then connected in parallel with the two ends of the flip-up key SW3 and the resistor R15; the volume down key SW1 is connected in series with the resistor R11 and then connected in parallel with the volume up key SW2 and the resistor R13; the G pole of the MOS tube Q1 is connected with the collector of the triode Q2, the D pole of the MOS tube Q1 is connected with the circuit of the timing switch key SW5 after being connected with the resistor R20 and the diode D6 in series, and the base of the triode Q2 is connected with the voltage of +3V3 after being connected with the resistor R22 in series.

Preferably, the L ED lamp circuit comprises L ED lamps D1-L ED lamps D4, wherein;

l ED lamp D1, one end is connected to resistance R12, the other end is connected to L ED lamp D2's circuit, L ED lamp D2, one end is connected to resistance R14, the other end is connected to L ED lamp D3's circuit, L ED lamp D3, one end is connected to resistance R16, the other end is connected to L ED lamp D4's circuit, L ED lamp D4, one end is connected to resistance R18, the other end is earthed.

Preferably, the main control circuit includes a chip U1, a pin 3 of the chip U1 is connected to a +3V3 power supply, a pin 4 of the chip U1 is connected to an S pole of the MOS transistor Q1, a pin 8 of the chip U1 is connected in series with the resistor R24 and then connected to a base circuit of the triode Q2, pins 9 to 12 of the chip U1 are connected to the resistor R12, the resistor R14, the resistor R16 and the resistor R18, a pin 16 of the chip U1 is connected to a circuit which is connected in series with the resistor R21 and the resistor R10, a pin 22 of the chip U1 is connected to the series resistors R3 and R5, one ends of the series resistors R3 and R5 are grounded, and the other end is connected to a D pole circuit of the MOS transistor Q1.

Preferably, the F L ASH circuit includes a chip U2,

pins

1 and 2 of the chip U2 are connected to

pins

15 and 13 of a chip U1, respectively, and

pins

5 and 6 of a chip U2 are connected to

pins

14 and 13 of a chip U1, respectively.

Preferably, the power amplifier circuit includes a chip U3, pin 1 of the chip U3 is connected to a resistor R1 and a resistor R2, the resistor R1 is connected to pin 4 of the chip U1, the resistor R2 is connected to pin 6 of the chip U1, pin 4 of the chip U3 is connected to a resistor R4 and a resistor R6 after being cascaded with a capacitor C8, the resistor R4 is connected to pin 1 of the chip U1, the resistor R6 is connected to pin 2 of the chip U1, and pin 5 and pin 8 of the chip U3 are connected to a power amplifier speaker L S1.

Preferably, the L INEIN circuit includes a L INEIN interface J1, pin 4 of the L INEIN interface J1 is connected to pin 18 of chip U1,

pins

2 and 3 of the INEIN interface J1 are connected to resistor R9 and resistor R8, respectively, and resistor R9 and resistor R8 are connected to capacitor C9 and then connected to pin 7 of chip U1.

Preferably, the earphone circuit comprises L INEIN interface J2, pin 4 of L INEIN interface J2 is connected to pin 18 of chip U1,

pins

2 and 3 of INEIN interface J2 are connected to capacitor C11 and capacitor C10, respectively, and capacitor C11 and capacitor C10 are connected to

pins

1 and 2 of chip U1, respectively.

Preferably, the charging circuit includes a USB interface U4 and a charging chip U5, a pin 1 of the USB interface U4 is connected to a pin 4 of a resistor R19 and the charging chip U5, a pin 2 and a pin 3 of the USB interface U4 are connected to a pin 20 and a pin 21 of the chip U1, the resistor R19 is connected to the pin 1 of the charging chip U5 after being connected to the light emitting diode D7 in series, and a pin 3 of the charging chip U5 is connected to the battery BT 1.

Compared with the prior art, the beneficial effects of the utility model are as follows:

this circular cloth music sleep appearance player of wrapping up in, the user accessible is pressed the music of function button selection broadcast, the size of volume and the settlement of broadcast time, and when inserting the earphone cord, stop the selected music of broadcast immediately, and regularly invalid get into standby state after, the music of automatic switch broadcast cell-phone or computer the inside, thereby make things convenient for people to use, help people fall asleep and improve the sleep quality, make people can keep long-time concentration in work, have the advantage of improving memory, improve work efficiency.

Drawings

FIG. 1 is an exploded view of the overall structure of the present invention;

FIG. 2 is a circuit diagram of the key of the present invention;

FIG. 3 is a circuit diagram of L ED lamp according to the present invention;

fig. 4 is a main control circuit diagram of the present invention;

fig. 5 is a circuit diagram of the F L ASH of the present invention;

fig. 6 is a circuit diagram of the power amplifier of the present invention;

fig. 7 is a circuit diagram of L INEIN of the present invention;

fig. 8 is a circuit diagram of the earphone of the present invention;

fig. 9 is a charging circuit diagram of the present invention.

The novel loudspeaker comprises a face cover 1, a face cover 2, wrapping cloth 3, a plated part 4, a middle cover 5, a loudspeaker sound box 6, a loudspeaker 7, a loudspeaker pressing part 8, a vibration piece 9, a rear cover 91, a key hole 92, a lamp hole 10, a key PCB board 101, a key circuit 102, L ED lamp circuit 11, a function key 12, a starting lamp accessory 13, a timing lamp accessory 14, a main PCB board 141, a main control circuit 141, a 142, F L ASH circuit 143, a power amplifier circuit 144, a L INEIN circuit 145, an earphone circuit 146, a charging circuit 15, a battery pressing part 16, a battery 17, a support pressing part 18, a support 19, an anti-slip pad 20 and a groove.

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 work belong to the protection scope of the present invention.

Referring to fig. 1, a circular cloth-wrapped music sleeping instrument player comprises a surface cover 1 and a rear cover 9, the outer side of the surface cover 1 is wrapped with a wrapping cloth 2, the middle part of the wrapping cloth 2 is provided with an electroplating piece 3, the electroplating piece 3 is matched with a groove 20 arranged on the surface cover 1, the electroplating piece 3 is embedded and installed in the groove 20, the inner side of the surface cover 1 is provided with a middle cover 4, the middle cover 4 is provided with a loudspeaker sound 5, the inner side of the loudspeaker sound 5 is embedded and installed with a loudspeaker 6, the outer side of the loudspeaker sound 5 is provided with a loudspeaker pressing piece 7, a vibration piece 8 is installed between the loudspeaker sound 5 and the loudspeaker pressing piece 7, the inner side of the rear cover 9 is provided with a key PCB board 10, a main PCB board 14 and a battery pressing piece 15, the key PCB board 10 is provided with a function key 11, a startup lamp accessory 12 and a timing lamp accessory 13, the function key 11 is matched with a key hole 91, the starting lamp accessory 12 and the timing lamp accessory 13 are respectively matched with a lamp hole 92 arranged on the rear cover 9, the starting lamp accessory 12 and the timing lamp accessory 13 are respectively inserted into the corresponding matched lamp holes 92, a battery 16 is arranged on the inner side of a battery pressing piece 15, a support pressing piece 17 is arranged on the outer side of the rear cover 9, a support 18 is movably arranged at one end of the support pressing piece 17 through a rotating shaft, and an anti-skid pad 19 is also arranged at the bottom outside the rear cover 9; the user can press the function key 11 to select the played sleep-aiding music, the volume and the playing time, so that the user can fall asleep and sleep quality is improved.

Referring to fig. 2-3, a key circuit 101 and an L ED lamp circuit 102 are disposed in the key PCB 10;

the key circuit 101 comprises a volume down key SW1, a volume up key SW2, an up key SW3, a down key SW4, a timing switch key SW5, a MOS transistor Q1 and a triode Q2, wherein the volume down key SW1, the volume up key SW2, the up key SW3, the down key SW4 and the timing switch key SW5 are connected with the MOS transistor Q1;

the timing switch key SW5 is connected with the +3V3 voltage after being connected with the diode D5, the resistor R21 and the resistor R10 in series; the down-turning key SW4 is connected in series with the resistor R17 and then connected in parallel with the two ends of the timing switch key SW5 and the resistor R21; the flip-up key SW3 is connected in series with the resistor R15 and then connected in parallel with the two ends of the flip-down key SW4 and the resistor R17; the volume up key SW2 is connected in series with the resistor R13 and then connected in parallel with the two ends of the flip-up key SW3 and the resistor R15; the volume down key SW1 is connected in series with the resistor R11 and then connected in parallel with the volume up key SW2 and the resistor R13; the G pole of an MOS tube Q1 is connected with the collector of a triode Q2, the D pole of an MOS tube Q1 is connected with a circuit of a timing switch key SW5 after being connected with a resistor R20 and a diode D6 in series, and the base of a triode Q2 is connected with a voltage of +3V3 after being connected with a resistor R22 in series;

through the volume down key SW1, the volume up key SW2, the flip up key SW3, the flip down key SW4 and the timing switch key SW5, the player has the functions of volume adjustment, music selection and on/off timing, so that people can use the player more conveniently;

the L ED lamp circuit 102 comprises L ED lamps D1-L ED lamps D4, wherein;

l ED lamp D1, one end connected to R12, the other end connected to L ED lamp D2 circuit, L ED lamp D2, one end connected to R14, the other end connected to L ED lamp D3 circuit, L ED lamp D3, one end connected to R16, the other end connected to L ED lamp D4 circuit, L ED lamp D4, one end connected to R18, the other end connected to ground, through L ED lamp D1-L ED lamp D4 on/off, show the on/off of the start-up lamp fitting 12 and the time setting of the timing lamp fitting 13.

Referring to fig. 4-9, a main control circuit 141, an F L ASH circuit 142, a power amplifier circuit 143, a L INEIN circuit 144, an earphone circuit 145 and a charging circuit 146 are disposed in the main PCB 14;

the main control circuit 141 comprises a chip U1, a pin 3 of a chip U1 is connected to a +3V3 power supply, a pin 4 of a chip U1 is connected to an S pole of a MOS tube Q1, a pin 8 of a chip U1 is connected with a resistor R24 in series and then connected to a base circuit of a triode Q2, pins 9 to 12 of a chip U1 are connected to a resistor R12, a resistor R14, a resistor R16 and a resistor R18 respectively, a pin 16 of the chip U1 is connected to a circuit which is connected with a resistor R21 and a resistor R10 in series, a pin 22 of a chip U1 is connected to series resistors R3 and R5 in series, one ends of the series resistors R3 and R5 are grounded, and the other end of the series resistors R3 and R58;

the chip U1 receives and processes the signals transmitted by the key circuit 101, thereby controlling the lower circuit and realizing the on-off of the lamp and the playing of music;

the F L ASH circuit 142 comprises a chip U2, wherein a pin 1 and a pin 2 of the chip U2 are respectively connected to a pin 15 and a pin 13 of the chip U1, and a pin 5 and a pin 6 of the chip U2 are respectively connected to a pin 14 and a pin 13 of the chip U1;

the power amplifier circuit 143 comprises a chip U3, a pin 1 of the chip U3 is respectively connected to a resistor R1 and a resistor R2, a resistor R1 is connected to a pin 4 of the chip U1, a resistor R2 is connected to a pin 6 of the chip U1, a pin 4 of the chip U3 is connected to a resistor R4 and a resistor R6 after being cascaded with a capacitor C8, the resistor R4 is connected to a pin 1 of the chip U1, the resistor R6 is connected to a pin 2 of the chip U1, a pin 5 and a pin 8 of the chip U3 are connected to a power amplifier speaker L S1, and the power amplifier circuit 143 receives signals transmitted by the main control circuit 141 so as to play selected music and volume;

l INEIN circuit 144 comprises L INEIN interface J1, pin 4 of L INEIN interface J1 is connected to pin 18 of chip U1, pin 2 and pin 3 of INEIN interface J1 are connected to resistor R9 and resistor R8 respectively, resistor R9 and resistor R8 are connected to capacitor C9 and then connected to pin 7 of chip U1;

the earphone circuit 145 comprises L INEIN interface J2, L INEIN interface J2 pin 4 connected with pin 18 of chip U1, pin 2 and pin 3 of INEIN interface J2 connected with capacitor C11 and capacitor C10 respectively, capacitor C11 and capacitor C10 connected with pin 1 and pin 2 of chip U1 respectively, when earphone wire is inserted, the earphone circuit 145 uploads signal to the main control circuit 141, the lower circuit is controlled by the main control circuit 141, thereby realizing stopping playing of selected music, and automatically switching playing music in mobile phone or computer after timing is invalid to enter standby state;

the charging circuit 146 comprises a USB interface U4 and a charging chip U5, a pin 1 of the USB interface U4 is connected to a pin 4 of a resistor R19 and a charging chip U5, a pin 2 and a pin 3 of the USB interface U4 are connected to a pin 20 and a pin 21 of a chip U1, the resistor R19 is connected to a pin 1 of a charging chip U5 after being connected to a light emitting diode D7 in series, and a pin 3 of the charging chip U5 is connected to a battery BT 1; the power supply is connected through the USB interface U4, and the battery BT1 is charged by the action of current through the charging chip U5.

This circular cloth music sleep appearance player of wrapping up in, the user accessible is pressed function button 11 and is selected the music of broadcast, the size of volume and the settlement of broadcast time, and when inserting the earphone cord, stop the selected music of broadcast immediately, and regularly inefficacy get into standby state after, the music of automatic switch broadcast cell-phone or computer the inside, thereby make things convenient for people to use, help people to fall asleep and improve the sleep quality, make people can keep long-time concentration in work, have the advantage that improves memory, improve work efficiency.

In summary, the following steps: this circular cloth music sleep appearance player of wrapping up in, the user can press function button 11 according to required to the play is selected helps the music of sleeping, the size of volume and the settlement of broadcast time, and the switching of music between player and cell-phone computer is realized to accessible plug earphone, thereby make things convenient for people to use, help people to fall asleep and improve the sleep quality, make people can keep long-time concentration in work, have the advantage of improving memory, improve work efficiency, therefore the effectual problem of having solved among the prior art.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a circular cloth music sleep appearance player of wrapping up in, includes face lid (1) and back lid (9), its characterized in that: the outer side of the face cover (1) is wrapped with wrapping cloth (2), the middle of the wrapping cloth (2) is provided with an electroplated part (3), the electroplated part (3) is matched with the face cover (1) through a groove (20), the electroplated part (3) is embedded in the groove (20), the inner side of the face cover (1) is provided with a middle cover (4), a loudspeaker sound box (5) is arranged on the middle cover (4), the inner side of the loudspeaker sound box (5) is provided with a loudspeaker (6) in an embedded mode, the outer side of the loudspeaker sound box (5) is provided with a loudspeaker pressing part (7), a vibration sheet (8) is arranged between the loudspeaker sound box (5) and the loudspeaker pressing part (7), the inner side of the rear cover (9) is provided with a key PCB board (10), a main PCB board (14) and a battery pressing part (15), the key PCB board (10) is provided with a function key (11), a starting lamp accessory (12) and a timing lamp accessory (13), and the function key (11) is matched with a key hole (91), one end of a function key (11) is inserted into a key hole (91), a starting lamp accessory (12) and a timing lamp accessory (13) are respectively matched with a lamp hole (92) formed in a rear cover (9), the starting lamp accessory (12) and the timing lamp accessory (13) are respectively inserted into the lamp holes (92) correspondingly matched with each other, a battery (16) is installed on the inner side of a battery pressing piece (15), a support pressing piece (17) is installed on the outer side of the rear cover (9), one end of the support pressing piece (17) passes through a rotating shaft movable installation support (18), and an anti-slip pad (19) is further installed at the outer bottom of the rear cover (9).

2. The circular wrapped music sleeping instrument player according to claim 1, wherein a key circuit (101) and an L ED lamp circuit (102) are arranged in the key PCB (10), and a main control circuit (141), an F L ASH circuit (142), a power amplifier circuit (143), a L INEIN circuit (144), an earphone circuit (145) and a charging circuit (146) are arranged in the main PCB (14).

3. The circular wrapped music sleeping instrument player according to claim 2, wherein: the key circuit (101) comprises a volume down key SW1, a volume up key SW2, an up key SW3, a down key SW4, a timing switch key SW5, a MOS tube Q1 and a triode Q2, wherein the volume down key SW1, the volume up key SW2, the up key SW3, the down key SW4 and the timing switch key SW5 are connected with the MOS tube Q1;

4. The circular cloth-wrapped music sleeping instrument player according to claim 2, wherein the L ED lamp circuit (102) comprises L ED lamps D1-L ED lamp D4, wherein;

5. The circular wrapped music sleeping instrument player according to claim 2, wherein: the main control circuit (141) comprises a chip U1, a pin 3 of the chip U1 is connected to a +3V3 power supply, a pin 4 of the chip U1 is connected to an S pole of a MOS tube Q1, a pin 8 of the chip U1 is connected to a resistor R24 in series and then connected to a base circuit of a triode Q2, pins 9 to 12 of the chip U1 are connected to a resistor R12, a resistor R14, a resistor R16 and a resistor R18 respectively, a pin 16 of the chip U1 is connected to a circuit which is connected with a resistor R21 and a resistor R10 in series, a pin 22 of the chip U1 is connected to series resistors R3 and R5, one ends of the series resistors R3 and R5 are grounded, and the other end of the series resistors is connected to a D pole circuit of the MOS tube.

6. The circular wrapped cloth music sleeping instrument player according to claim 2, wherein the F L ASH circuit (142) comprises a chip U2, the pins 1 and 2 of the chip U2 are respectively connected to the pins 15 and 13 of the chip U1, and the pins 5 and 6 of the chip U2 are respectively connected to the pins 14 and 13 of the chip U1.

7. The circular wrapped cloth music sleeping instrument player according to claim 2, wherein the power amplifier circuit (143) comprises a chip U3, a pin 1 of the chip U3 is respectively connected to a resistor R1 and a resistor R2, the resistor R1 is connected to a pin 4 of the chip U1, a resistor R2 is connected to a pin 6 of the chip U1, a pin 4 of the chip U3 is connected to the resistor R4 and a resistor R6 after being cascaded with a capacitor C8, the resistor R4 is connected to the pin 1 of the chip U1, the resistor R6 is connected to a pin 2 of the chip U1, and a pin 5 and a pin 8 of the chip U3 are connected to a speaker L S1.

8. The circular wrapped cloth music sleeping apparatus player according to claim 2, wherein the L INEIN circuit (144) comprises a L INEIN interface J1, a pin 4 of the L INEIN interface J1 is connected to a pin 18 of a chip U1, pins 2 and 3 of the INEIN interface J1 are respectively connected to a resistor R9 and a resistor R8, and a resistor R9 and a resistor R8 are connected to a capacitor C9 and then connected to a pin 7 of the chip U1.

9. The circular wrapped cloth music sleeping instrument player according to claim 2, wherein the earphone circuit (145) comprises L INEIN interface J2, pin 4 of the L INEIN interface J2 is connected to pin 18 of the chip U1, pins 2 and 3 of the INEIN interface J2 are respectively connected to a capacitor C11 and a capacitor C10, and the capacitor C11 and the capacitor C10 are respectively connected to pin 1 and pin 2 of the chip U1.

10. The circular wrapped music sleeping instrument player according to claim 2, wherein: charging circuit (146) includes USB interface U4 and charging chip U5, USB interface U4's foot 1 is connected respectively in resistance R19 and charging chip U5's foot 4, includes that USB interface U4's foot 2, foot 3 are connected with chip U1's foot 20, foot 21 respectively, resistance R19 concatenates emitting diode D7 back, connect in charging chip U5's foot 1, charging chip U5's foot 3 is connected in battery BT 1.