CN217088205U

CN217088205U - Flashlight control circuit and flashlight

Info

Publication number: CN217088205U
Application number: CN202220356204.9U
Authority: CN
Inventors: 刘兵
Original assignee: Zhongshan Yehua Intelligent Technology Co ltd
Current assignee: Zhongshan Yehua Intelligent Technology Co ltd
Priority date: 2022-02-22
Filing date: 2022-02-22
Publication date: 2022-07-29
Anticipated expiration: 2032-02-22

Abstract

The utility model discloses a flashlight control circuit and a flashlight, wherein, the flashlight control circuit comprises a battery; a charging circuit for charging the battery, the charging circuit being electrically connected to the battery; the control circuit is used for turning on or off the LED drive circuit according to a signal of the switch and sending a control signal to the LED drive circuit, and the control circuit is connected with the battery; and the LED driving circuit is used for driving the luminous LED and adjusting the brightness of the LED according to a control signal sent by the brightness adjusting control circuit, and the LED driving circuit is connected with the control circuit. The utility model discloses simple structure can conveniently adjust flashlight luminance, and has the flashlight control circuit of the function of charging.

Description

Flashlight control circuit and flashlight

Technical Field

The utility model relates to a circuit design field, concretely relates to flashlight control circuit and flashlight.

Background

A flashlight: english: flashlight or Torch for short is a handheld electronic lighting tool. A typical flashlight has a bulb and focusing reflector powered by a battery and has a handle-type housing for hand-holding. Although of a rather simple design, it was invented until the end of the 19 th century because it had to combine the invention of a battery with a light bulb. In the early days, because the storage capacity of the battery was insufficient, it was called "Flashlight" in english, meaning a short-lived lamp. The development of flashlights has gone through several periods, with the current flashlight being characterized by: application of brand new lighting technology-LED. The color temperature reaches the unprecedented height, approaches or even exceeds the color temperature of white light, and the power consumption is lower.

However, the existing flashlight can only control the lighting or the turning off of the flashlight through the switch button, and the existing flashlight cannot adjust the light intensity according to the needs of a user.

Therefore, the existing flashlight control circuit and flashlight are to be further improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the weak point among the prior art, provide a simple structure, can conveniently adjust flashlight luminance, and have the flashlight control circuit of the function of charging.

The invention further provides a flashlight adopting the flashlight control circuit.

In order to achieve the first purpose, the utility model adopts the following scheme:

a flashlight control circuit, comprising:

a battery;

a charging circuit for charging the battery, the charging circuit being electrically connected to the battery;

the control circuit is used for turning on or off the LED drive circuit according to a signal of the switch and sending a control signal to the LED drive circuit, and the control circuit is connected with the battery;

the control circuit comprises a control chip U2, a first pin of the control chip U2 is connected with the anode of the battery, a second pin of the control chip U2 is connected with the anode of the direct-current power supply circuit, a red LED and a resistor R6 are connected in series between a third pin of the control chip U2 and the anode of the battery, a fourth pin of the control chip U2 is connected with a switch K1, one end of the switch K1 is grounded, a fifth pin of the control chip U2 is connected with an LED drive circuit, an eighth pin of the control chip U2 is grounded, and a capacitor C3 is connected in series between the first pin and the eighth pin of the control chip U2;

and the LED driving circuit is used for driving the luminous LED and adjusting the brightness of the LED according to a control signal sent by the brightness adjusting control circuit, and the LED driving circuit is connected with the control circuit.

As another improvement of the flashlight control circuit of the present invention, the LED driving circuit includes a fet Q1, the gate of the fet Q1 is connected to the fifth pin of the control chip U2, a resistor R3 is connected in series between the gate of the fet Q1 and the fifth pin of the control chip U2, the source of the fet Q1 is connected in series to the resistor R10 and then to the ground, a resistor R9 is connected in parallel to both ends of the resistor R10, the gate of the fet Q1 is connected in series to the resistor R1 and then to the ground, the negative electrode of the drain of the fet Q1 is connected to the light-emitting LED, and the positive electrode of the light-emitting LED is connected to the first pin of the control chip U2.

As another improvement of the flashlight control circuit of the present invention, the anode of the light emitting LED is serially connected with the capacitor C1 and then grounded.

As another improvement of the flashlight control circuit of the present invention, the charging circuit includes a charging management chip U1, a USB connector is connected with a VCC pin of the charging management chip U1, a full-charge status indicator lamp is arranged between the VCC pin and the CHRG pin of the charging management chip U1, a charging indicator lamp is arranged between the VCC pin and the STDBY pin of the charging management chip U1, the GND pin of the charging management chip U1 is grounded, the PROG pin of the charging management chip U1 is grounded after being connected with a resistor R2 in series, the TEMP pin of the charging management chip U1 is connected with the negative electrode of the battery and grounded, the BAT pin of the charging management chip U1 is connected with the positive electrode of the battery, and a capacitor C2 is connected in parallel at two ends of the battery, and the BAT pin of the charging management chip U1 is respectively connected with the first pin of the control chip U2 and the anode of the light-emitting LED.

As another improvement of the flashlight control circuit of the present invention, a resistor R4 is connected in series between the VCC pin of the charging management chip U1 and the positive pole of the full-charge status indicator lamp and the positive pole of the charging indicator lamp.

As the utility model discloses another kind of improvement of flashlight control circuit, the first stitch and the sixth stitch ground that USB connects, the second stitch and the fifth stitch that USB connects are connected with resistance R5 concatenate the back and are connected with the VCC pin of charge management chip U1 resistance R7 has concatenated between the first stitch that USB connects and the third stitch resistance R8 has concatenated between the first stitch that USB connects and the fourth stitch electric capacity C4 has concatenated between the first stitch that USB connects and the VCC pin of charge management chip U1.

As the utility model discloses another kind of improvement of flashlight control circuit, direct current supply circuit including with the resistance R11 that the fifth stitch that the USB connects is connected, resistance R11 one end with control chip U2's second stitch is connected, control chip U2's second stitch and resistance R12 concatenate the back ground connection.

As the utility model discloses another kind of improvement of flashlight control circuit, still including software download port, the first stitch of software download port is connected with the BAT pin of charging management chip U1, the second stitch of software download port is connected with control chip U2's seventh stitch, the third stitch of software download port is connected with control chip U2's sixth stitch, the fourth stitch ground connection of software download port.

In order to achieve the second purpose, the invention adopts the following scheme: a flashlight employing a flashlight control circuit as described in any one of the above.

To sum up, the utility model discloses for its beneficial effect of prior art is:

the utility model discloses flashlight control circuit adopts LED to dab switch K1 and control chip U2 and mutually supports for control chip U2 can make corresponding action according to user's touch, has promoted control circuit's control accuracy and stability, has increased the diversification of light source luminous mode simultaneously, can download the port through software moreover and carry out intelligent programming, self-defined luminous mode.

Drawings

Fig. 1 is a schematic diagram of the present invention.

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

Fig. 3 is a schematic diagram of the LED driving circuit of the present invention.

Fig. 4 is a schematic diagram of the charging circuit of the present invention.

In the figure: 1. a battery; 2. a charging circuit; 3. a control circuit; 4. an LED drive circuit; 5. a full state indicator light; 6. a charging indicator light; 7. a USB connector; 8. a software download port.

Detailed Description

The above and further features and advantages of the present invention will be described in more detail below with reference to the accompanying drawings.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-4, a flashlight control circuit includes:

a battery 1;

a charging circuit 2 for charging the battery 1, the charging circuit 2 being electrically connected to the battery 1;

the control circuit 3 is used for turning on or off the LED drive circuit 4 according to a signal of the switch and sending a control signal to the LED drive circuit 4, and the control circuit 3 is connected with the battery 1; the control circuit 3 comprises a control chip U2, a first pin of the control chip U2 is connected with the positive electrode of the battery 1, a second pin of the control chip U2 is connected with the positive electrode of the direct-current power supply circuit, a red light LED and a resistor R6 are connected in series between a third pin of the control chip U2 and the positive electrode of the battery 1, a fourth pin of the control chip U2 is connected with a switch K1, one end of the switch K1 is grounded, a fifth pin of the control chip U2 is connected with the LED driving circuit 4, an eighth pin of the control chip U2 is grounded, and a capacitor C3 is connected in series between the first pin and the eighth pin of the control chip U2;

and the LED driving circuit 4 is used for driving the light-emitting LED and adjusting the brightness of the LED according to a control signal sent by the brightness adjusting control circuit 3, and the LED driving circuit 4 is connected with the control circuit 3.

The utility model adopts 6 × 9 plug-in light-touch button switch to cooperate with the control chip U2, when the user presses the switch K1, the control chip U2 controls the brightness of the light-emitting LED to be 100%, and simultaneously, the red light LED D2 lights; when the K1 is pressed again, the control chip U2 controls the brightness of the light-emitting LED to be 50%; when the K1 is pressed again, the control chip U2 controls the brightness of the light-emitting LED to be 10%; and circulating in sequence. The utility model discloses flashlight control circuit is when charged state, and the flashlight function is closed.

The utility model discloses in LED drive circuit 4 includes field effect transistor Q1, field effect transistor Q1's grid is connected with control chip U2's fifth stitch resistance R3 has concatenated between field effect transistor Q1's grid and control chip U2's the fifth stitch resistance R3, field effect transistor Q1's source electrode concatenates resistance R10 back ground connection resistance R10 has concatenated resistance R9 on both ends, field effect transistor Q1's grid concatenates resistance R1 back ground connection, field effect transistor Q1's the luminous LED's of drain electrode negative pole is connected, luminous LED's positive pole is connected with control chip U2's first stitch. The anode of the light-emitting LED is connected with a capacitor C1 in series and then is grounded.

The utility model discloses carry out filtering to the electric current of input through electric capacity C1 among the LED drive circuit 4, carry out level conversion through field effect transistor Q1 for luminous LED can obtain stable suitable electric current and voltage, thereby improves illuminating effect. The utility model discloses well luminous LED can comprise single luminous LED bulb, also can be formed by a plurality of luminous LED lamp pearls and connect.

The utility model discloses in charging circuit 2 is including charging management chip U1 be connected with USB joint 7 on the VCC pin of charging management chip U1 be equipped with between VCC pin of charging management chip U1 and the CHRG pin and be full of status indicator lamp 5 be equipped with charge indicator lamp 6 between VCC pin of charging management chip U1 and the STDBY pin, charge management chip U1's GND pin ground connection, charge management chip U1's PROG pin concatenates resistance R2 back ground connection, charge management chip U1's TEMP pin with battery 1's negative pole is connected and ground connection, charge management chip U1's BAT pin with battery 1's positive pole is connected battery 1's both ends are last and have connect electric capacity C2, charge management chip U1's BAT pin is connected with control chip U2's the first stitch, luminous LED's positive pole respectively. A resistor R4 is connected in series between the VCC pin of the charging management chip U1 and the positive electrode of the full-charge status indicator lamp 5 and the positive electrode of the charging indicator lamp 6.

The utility model discloses in connect 7 through the USB and be connected with external power source, when battery 1 was in charged state or not charged state, charge indicator 6 lighted, showed ruddiness. The full state indicator lamp 5 is lighted to display green light when the battery 1 is in the full state.

The utility model discloses in can carry out filtering through electric capacity C2 for charging current is more steady.

USB connects 7's first stitch and sixth stitch ground connection, USB connects 7's second stitch and fifth stitch and resistance R5 concatenate the back and be connected with the VCC pin of the management chip U1 that charges USB connects 7 and has concatenated resistance R7 between USB connects 7's first stitch and the third stitch resistance R8 has concatenated between USB connects 7's first stitch and the fourth stitch USB connects 7 and has concatenated electric capacity C4 between USB connects 7's first stitch and the VCC pin of the management chip U1 that charges.

The utility model discloses in the direct current supply circuit including with the resistance R11 that the fifth stitch of USB joint 7 is connected, resistance R11 one end with control chip U2's second stitch is connected, control chip U2's second stitch and resistance R12 concatenate the back ground connection.

The utility model discloses in still including software download port 8, software download port 8's first stitch is connected with the BAT pin of the management chip U1 that charges, software download port 8's second stitch is connected with control chip U2's seventh stitch, software download port 8's third stitch is connected with control chip U2's sixth stitch, software download port 8's fourth stitch ground connection.

The utility model discloses in order to carry out intelligent programming, self-defined luminous mode through software download port for the luminous more diversified of flashlight.

The utility model relates to a flashlight adopts flashlight control circuit as above.

The basic principles and main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A flashlight control circuit, comprising:

a battery (1);

a charging circuit (2) for charging the battery (1), the charging circuit (2) being electrically connected to the battery (1);

the control circuit (3) is used for switching on or switching off the LED drive circuit (4) according to a signal of the switch and sending a control signal to the LED drive circuit (4), and the control circuit (3) is connected with the battery (1); the control circuit (3) comprises a control chip U2, a first pin of the control chip U2 is connected with the anode of the battery (1), a second pin of the control chip U2 is connected with the anode of the direct-current power supply circuit, a red LED and a resistor R6 are connected in series between a third pin of the control chip U2 and the anode of the battery (1), a fourth pin of the control chip U2 is connected with a switch K1, one end of the switch K1 is grounded, a fifth pin of the control chip U2 is connected with the LED drive circuit (4), an eighth pin of the control chip U2 is grounded, and a capacitor C3 is connected in series between the first pin and the eighth pin of the control chip U2;

and the LED driving circuit (4) is used for driving the luminous LED and adjusting the brightness of the LED according to a control signal sent by the brightness adjusting control circuit (3), and the LED driving circuit (4) is connected with the control circuit (3).

2. The flashlight control circuit of claim 1, wherein the LED driving circuit (4) comprises a field effect transistor Q1, the gate of the field effect transistor Q1 is connected with the fifth pin of the control chip U2, a resistor R3 is connected in series between the gate of the field effect transistor Q1 and the fifth pin of the control chip U2, the source of the field effect transistor Q1 is connected with the resistor R10 in series and then grounded, a resistor R9 is connected in parallel at two ends of the resistor R10, the gate of the field effect transistor Q1 is connected with the resistor R1 in series and then grounded, the cathode of the light-emitting LED of the drain of the field effect transistor Q1 is connected, and the anode of the light-emitting LED is connected with the first pin of the control chip U2.

3. The flashlight control circuit of claim 2 wherein said light emitting LED is grounded after having its anode connected in series with a capacitor C1.

4. The flashlight control circuit of claim 2, wherein the charging circuit (2) comprises a charging management chip U1, a USB connector (7) is connected to a VCC pin of the charging management chip U1, a full-charge indicator (5) is arranged between a VCC pin and a CHRG pin of the charging management chip U1, a charging indicator (6) is arranged between a VCC pin and a STDBY pin of the charging management chip U1, a GND pin of the charging management chip U1 is grounded, a PROG pin of the charging management chip U1 is grounded after being connected in series with a resistor R2, a TEMP pin of the charging management chip U1 is connected to a negative electrode of the battery (1) and grounded, a BAT pin of the charging management chip U1 is connected to a positive electrode of the battery (1), capacitors C2 are connected to both ends of the battery (1), and BAT pins of the charging management chip U1 are respectively connected to a first pin of a control chip U2, The anodes of the light-emitting LEDs are connected.

5. The flashlight control circuit of claim 4 wherein a resistor R4 is connected in series between the VCC pin of the charge management chip U1 and the positive terminals of the full charge indicator light (5) and the charge indicator light (6).

6. The flashlight control circuit of claim 4, wherein the first pin and the sixth pin of the USB connector (7) are grounded, the second pin and the fifth pin of the USB connector (7) are connected in series with a resistor R5 and then connected with the VCC pin of the charging management chip U1, a resistor R7 is connected in series between the first pin and the third pin of the USB connector (7), a resistor R8 is connected in series between the first pin and the fourth pin of the USB connector (7), and a capacitor C4 is connected in series between the first pin of the USB connector (7) and the VCC pin of the charging management chip U1.

7. The flashlight control circuit of claim 6, wherein the DC power supply circuit comprises a resistor R11 connected to a fifth pin of the USB connector (7), one end of the resistor R11 is connected to a second pin of the control chip U2, and the second pin of the control chip U2 is connected in series with a resistor R12 and then grounded.

8. The flashlight control circuit of claim 6, further comprising a software download port (8), wherein a first pin of the software download port (8) is connected to the BAT pin of the charging management chip U1, a second pin of the software download port (8) is connected to a seventh pin of the control chip U2, a third pin of the software download port (8) is connected to a sixth pin of the control chip U2, and a fourth pin of the software download port (8) is grounded.

9. A flashlight employing the flashlight control circuit of any one of claims 1-8.