Flashlight circuit capable of switching power supply

Abstract

The utility model discloses a flashlight circuit capable of switching power supplies, which belongs to the technical field of flashlight circuits and comprises a lithium battery, a dry battery, a power supply switching circuit, a control chip, a key detection circuit and / or a Hall detection circuit. The button detection circuit is connected with the control chip and transmits a button signal to the control chip, the Hall detection circuit is connected with the control chip and transmits a Hall signal to the control chip, the control chip is connected with the power supply switching circuit, and the power supply switching circuit switches the lithium battery or the dry battery to supply power according to the signal of the control chip. And the lithium battery and the dry battery are cooperatively connected, so that the circuit can be switched according to the key, and the light-emitting element uses different power supplies.

Description

Technical Field

[0001] The present application relates to the technical field of flashlight circuits, and in particular to a flashlight circuit for switching power supply. Background Art

[0002] As a commonly used lighting tool, a typical flashlight has a battery-powered light-emitting component and a focusing reflector, and a handle-type housing for hand-held use. The flashlight has become one of the indispensable mobile lighting devices in people's daily life because of its relatively simple design, easy to use and carry.

[0003] A traditional flashlight includes a lamp holder, a lamp tube, a tail cover, a battery, a light-emitting component and a switch. The lamp holder with a focusing reflector inside is connected to the front end of the lamp tube and covers the outside of the bulb to protect the bulb and focus light. The battery is set in the lamp tube to power the bulb. The tail cover is connected to the rear end of the lamp tube to fix the battery. The tail cover is also provided with a charging plug to charge the battery. The switch is set on the lamp tube, connecting the bulb and the battery to control the connection and disconnection of the bulb and the battery.

[0004] Then the corresponding circuit control in the flashlight will be relatively simple. In exploring market demand, our company found that most flashlights are powered by a battery, either a dry cell or a rechargeable battery. If only dry cells are used for power supply, it will cause frequent battery replacement, which is troublesome; if only rechargeable batteries are used for power supply, it will take several hours or even more than ten hours to charge the rechargeable battery when it is exhausted, which will limit the application of the flashlight. For example, when working in the field, the battery cannot be charged in time when it is out of power, which will cause trouble to the user.

[0005] Therefore, our company has designed a new flashlight, which is powered by lithium batteries and dry batteries. Users can switch the power supply battery according to their needs, which is convenient for use in various occasions and prolongs the continuous lighting time of the flashlight. In response to this solution, a flashlight circuit for switching power supply is designed in this application, which is used to control the switching of different power supply sources to power the flashlight. Utility Model Content

[0006] The technical problem to be solved by the present application is to provide a flashlight circuit that switches power supply, and in conjunction with connecting a lithium battery and a dry battery, the present application can use different power supplies for the circuit and the light-emitting element according to the switching of a button.

[0007] The technical solution adopted in the present application is: a flashlight circuit for switching power supply, including a lithium battery, a dry battery, a power supply switching circuit, a control chip, a key detection circuit and / or a Hall detection circuit, the lithium battery and the dry battery are respectively connected to the power supply switching circuit, the key detection circuit is connected to the control chip and transmits the key signal to the control chip, the Hall detection circuit is connected to the control chip and transmits the Hall signal to the control chip, the control chip is connected to the power supply switching circuit, and the power supply switching circuit switches the lithium battery or dry battery for power supply according to the signal of the control chip.

[0008] Compared with the prior art, the advantage of the present application is that the present application is equipped with a lithium battery and a dry cell, and a power supply switching circuit connected to the control circuit board is correspondingly equipped. The power supply switching circuit is connected to the control chip, and switches the lithium battery or dry cell to power the flashlight according to the signal sent by the control chip. The control chip is connected to a key detection circuit and / or a Hall detection circuit, and the key detection circuit and the Hall detection circuit correspond to two types of switching switches, namely a key switch and a magnetic control switch. In the present application, the user can operate and select different power supplies through a key switch or a magnetic control switch. The corresponding key detection circuit will transmit the detected key signal to the control chip, and the Hall detection circuit will transmit the detected Hall signal to the control chip, so that the control chip obtains the user's choice and switches the power supply of the flashlight. The present application can realize that the control circuit board and the light-emitting component are powered by dry cells or lithium batteries. As a result, it is convenient to use the flashlight in a variety of occasions and prolong the continuous lighting time of the flashlight.

[0009] In some embodiments of the present application, the present application also includes a voltage measuring circuit, the lithium battery and the dry battery are respectively connected to the voltage detection circuit, the voltage detection circuit is connected to the control chip, and the voltage detection circuit obtains the voltage signal of the lithium battery and the dry battery and sends it to the control chip.

[0010] In some embodiments of the present application, the control chip is connected to a power display circuit, and the power display circuit includes two groups of indicator light groups, which correspond to the power of the lithium battery and the power of the dry battery respectively. The control chip controls the operation of the indicator light groups according to the voltage signals of the lithium battery and the dry battery.

[0011] Specifically, in the voltage detection circuit, after resistor voltage division and capacitor filtering, the current voltage signal is sent to the control chip. The control chip obtains the actual voltage value based on the voltage signal, and then controls the indicator light group to work according to the actual voltage value, thereby displaying the power level.

[0012] In some embodiments of the present application, the control chip is connected to the COB circuit, that is, the control chip controls the operation of the COB circuit, and the COB circuit, as the name implies, is the circuit where the light-emitting component of the flashlight in the present application is located, and the control chip controls the operation of the light-emitting component.

[0013] In some embodiments of the present application, the present application also includes a charge and discharge circuit connected to the control chip, the charge and discharge circuit includes a charging USB interface and a discharging USB interface, and the charge and discharge circuit is connected to the power supply switching circuit. In the present application, the maximum charging current can reach 1.8A, and the maximum output is 5V / 1A. By setting the pull-down resistor (R1, R2) of the charge and discharge signal, it is convenient for the control chip to detect the input and output status, and further display an accurate full or output status.

[0014] In some embodiments of the present application, the present application is provided with a power supply interface, which is connected to the positive and negative electrodes of the lithium battery and the positive and negative electrodes of the dry cell respectively. In the present application, B+ and B- represent the positive and negative electrodes of the lithium battery, and AA+ and AA- represent the positive and negative electrodes of the dry cell. The power supply is aggregated and filtered to supply power to the control chip to ensure the stability of the power supply. In the present application, the output VDD is the power supply of the power supply.

[0015] In some embodiments of the present application, the power supply switching circuit includes a third field effect transistor, a fifth field effect transistor and a sixth transistor, the positive electrode of the dry battery is connected to the source of the third field effect transistor through a first diode, and the drain of the third field effect transistor outputs the battery power.

[0016] In some embodiments of the present application, the positive electrode of the dry battery is connected to the source of the fifth field effect transistor, the gate of the fifth field effect transistor is connected to the collector of the sixth transistor, the emitter of the sixth transistor is grounded, and the base of the sixth transistor is connected to the control chip through the fourteenth resistor.

[0017] In some embodiments of the present application, the power supply switching circuit includes a first field effect transistor, a fourth field effect transistor, a second transistor and an eighth transistor, the positive electrode of the lithium battery is connected to the drain of the first field effect transistor, the gate of the first field effect transistor is connected to the collector of the second transistor, the source of the first field effect transistor outputs the battery power, and the base of the second transistor is connected to the control chip.

[0018] In some embodiments of the present application, the positive electrode of the lithium battery is connected to the source of the fourth field effect transistor, the gate of the fourth field effect transistor is connected to the collector of the eighth transistor, the emitter of the eighth transistor is grounded, and the base of the eighth transistor is connected to the control chip through a thirteenth resistor.

[0019] In this application, the control chip is a chip of model NY8B062FS14. Two chips of model TP4056 and TP4333 are used in the charge and discharge circuit.

[0020] The above-mentioned implementation modes can be combined arbitrarily based on the common knowledge in the art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application will be further described in detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be used as a limitation on the scope of the present application. In addition, unless otherwise specified, the drawings are only schematically representing the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 A circuit diagram of the present application;

[0023] Figure 2 A power supply switching circuit in this application;

[0024] Figure 3 The voltage detection circuit in this application;

[0025] Figure 4 It is the key detection circuit in this application;

[0026] Figure 5 The Hall detection circuit in this application;

[0027] Figure 6 A circuit for the control chip in this application;

[0028] Figure 7 The charging and discharging circuit in this application;

[0029] Figure 8 This is the power display circuit in this application.

[0030] Among them, the specific descriptions of the accompanying drawings are as follows: 1. power supply switching circuit; 2. button detection circuit; 3. Hall detection circuit; 4. voltage detection circuit; 5. power display circuit; 6. COB circuit; 7. charging and discharging circuit; MCU, control chip; Q1, first field effect transistor; Q2, second transistor; Q3, third field effect transistor; Q4, fourth field effect transistor; Q5, fifth field effect transistor; Q6, sixth transistor; Q8, eighth transistor; D1, first diode; D2, second diode; BAT, battery power supply; B+, positive electrode of lithium battery; AA+, positive electrode of dry battery; R8, eighth resistor. DETAILED DESCRIPTION

[0031] The present application is described in detail below in conjunction with the accompanying drawings.

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] A flashlight circuit for switching power supply, embodiment 1 Figure 1 As shown: including lithium batteries, dry batteries, power supply switching circuit 1, control chip MCU, button detection circuit 2 and / or Hall detection circuit 3, the lithium batteries and dry batteries are respectively connected to the power supply switching circuit 1. The present application is equipped with lithium batteries and dry batteries, and is correspondingly equipped with a power supply switching circuit 1 connected to the control circuit board. The power supply switching circuit 1 is connected to the control chip MCU, and switches the lithium battery or dry battery to power the flashlight according to the signal sent by the control chip MCU. The present application can realize powering the control circuit board and the light-emitting component by dry batteries or lithium batteries. As a result, it is convenient to use the flashlight in a variety of occasions and extend the continuous lighting time of the flashlight.

[0034] The key detection circuit 2 is connected to the control chip MCU and transmits the key signal to the control chip MCU, the Hall detection circuit 3 is connected to the control chip MCU and transmits the Hall signal to the control chip MCU, the control chip MCU is connected to the power supply switching circuit 1, and the power supply switching circuit 1 switches the lithium battery or dry battery power supply according to the signal of the control chip MCU. The key detection circuit 2 and the Hall detection circuit 3 correspond to two types of switching switches, namely the key switch and the magnetic control switch. In this application, the user can operate the key switch or the magnetic control switch to select different power supplies. The corresponding key detection circuit 2 will transmit the detected key signal to the control chip MCU, and the Hall detection circuit 3 will transmit the detected Hall signal to the control chip MCU. The control chip MCU thus obtains the user's choice and switches the power supply of the flashlight.

[0035] The Hall detection circuit 3 switches different power supply modes by detecting the position of the magnet. The key detection circuit 2 detects the key state to switch different functions. The present application can use two different switching switches, such as a magnetic control switch or a key switch.

[0036] Embodiment 2, as Figures 1 to 8 As shown, the present application also includes a voltage measuring circuit. The lithium battery and the dry battery are respectively connected to the voltage detection circuit 4, and the voltage detection circuit 4 is connected to the control chip MCU. The voltage detection circuit 4 obtains the voltage signal of the lithium battery and the dry battery and sends it to the control chip MCU.

[0037] The control chip MCU is connected to a power display circuit 5, and the power display circuit 5 includes two groups of indicator light groups, which correspond to the power of the lithium battery and the power of the dry battery respectively. The control chip MCU controls the indicator light groups to work according to the voltage signals of the lithium battery and the dry battery. In the drawings of the specification, BL1-BL4 are lithium battery power display indicators, and BL5-BL8 are dry battery power display indicators.

[0038] Specifically, after the voltage detection circuit 4 passes through resistor voltage division and capacitor filtering, the current voltage signal is sent to the control chip MCU. The control chip MCU obtains the actual voltage value according to the voltage signal, and then controls the indicator light group to work according to the actual voltage value, thereby displaying the power level.

[0039] The control chip MCU is connected to the COB circuit 6. That is, the control chip MCU controls the operation of the COB circuit 6. As the name implies, the COB circuit 6 is the circuit where the light-emitting component of the flashlight in this application is located, and the control chip MCU controls the operation of the light-emitting component.

[0040] The present application also includes a charge and discharge circuit 7 connected to the control chip MCU, the charge and discharge circuit 7 includes a charging USB interface and a discharging USB interface, and the charge and discharge circuit 7 is connected to the power supply switching circuit 1. In the present application, the maximum charging current can reach 1.8A, and the maximum output is 5V / 1A. By setting the pull-down resistor (R1, R2) of the charge and discharge signal, it is convenient for the control chip MCU to detect the input and output status, and further display an accurate full or output status.

[0041] The rest of the content of the second embodiment is the same as that of the first embodiment.

[0042] Embodiment three, as Figures 1 to 8 As shown, the present application is provided with a power supply interface, which is connected to the positive and negative poles of the lithium battery and the positive and negative poles of the dry cell respectively. In the present application, B+ and B- represent the positive and negative poles of the lithium battery, and AA+ and AA- represent the positive and negative poles of the dry cell. The power supply is aggregated and filtered to supply power to the control chip MCU to ensure the stability of the power supply. In the present application, the output VDD is the power supply.

[0043] The power supply switching circuit 1 includes a third field effect transistor Q3, a fifth field effect transistor Q5 and a sixth transistor Q6. The positive electrode AA+ of the dry battery is connected to the source of the third field effect transistor Q3 through a first diode D1, and the drain of the third field effect transistor Q3 outputs the battery power BAT.

[0044] The positive electrode AA+ of the dry battery is connected to the source of the fifth field effect transistor Q5, the gate of the fifth field effect transistor Q5 is connected to the collector of the sixth transistor Q6, the emitter of the sixth transistor Q6 is grounded, and the base of the sixth transistor Q6 is connected to the control chip MCU through the fourteenth resistor.

[0045] The power supply switching circuit 1 includes a first field effect transistor Q1, a fourth field effect transistor Q4, a second transistor Q2 and an eighth transistor Q8, the positive electrode B+ of the lithium battery is connected to the drain of the first field effect transistor Q1, the gate of the first field effect transistor Q1 is connected to the collector of the second transistor Q2, the source of the first field effect transistor Q1 outputs the battery power BAT, and the base of the second transistor Q2 is connected to the control chip MCU.

[0046] The positive electrode B+ of the lithium battery is connected to the source of the fourth field effect transistor Q4, the gate of the fourth field effect transistor Q4 is connected to the collector of the eighth transistor Q8, the emitter of the eighth transistor Q8 is grounded, and the base of the eighth transistor Q8 is connected to the control chip MCU through the thirteenth resistor.

[0047] In the power supply switching circuit 1, the control chip MCU controls whether the power supply is lithium battery or dry battery according to the position information detected by the Hall detection circuit 3 or the key information detected by the key detection circuit 2. The function of the first field effect transistor Q1 is to prevent the lithium battery from being charged when the voltage of the dry battery is higher than that of the lithium battery when the dry battery is powered. The third field effect transistor Q3 and the first diode D1 are used to control the power supply of the dry battery to be turned off when the lithium battery is powered. When the lithium battery is powered alone, the first diode D1 can also prevent the dry battery from being charged when the lithium battery voltage is higher than that of the dry battery.

[0048] The battery power supply BAT outputs the power supply VDD after passing through the second diode D2 and the eighth resistor R8, and the power supply VDD supplies power to the control chip MCU. Specifically, one end of the eighth resistor R8 is connected to the second diode D2, and the other end of the eighth resistor R8 outputs the power supply VDD, and the other end of the eighth resistor R8 is grounded after passing through the eleventh diode C11. In this application, D2, R8, and C11 constitute a power supply summary and filter to supply power to the control chip MCUMCU to ensure the stability of the power supply.

[0049] In this application, the control chip MCU is a chip of model NY8B062FS14. The charge and discharge circuit 7 uses two chips of model TP4056 and TP4333.

[0050] The other contents of the third embodiment are the same as those of the first embodiment or the second embodiment.

[0051] The present application is described in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A flashlight circuit for switching power supply, characterized in that: It includes a lithium battery, a dry battery, a power supply switching circuit, a control chip, a key detection circuit and / or a Hall detection circuit. The lithium battery and the dry battery are respectively connected to the power supply switching circuit. The key detection circuit is connected to the control chip and transmits the key signal to the control chip. The Hall detection circuit is connected to the control chip and transmits the Hall signal to the control chip. The control chip is connected to the power supply switching circuit. The power supply switching circuit switches the lithium battery or dry battery for power supply according to the signal of the control chip.

2. A flashlight circuit for switching power supply according to claim 1, characterized in that: It also includes a voltage detection circuit. The lithium battery and the dry battery are respectively connected to the voltage detection circuit, and the voltage detection circuit is connected to the control chip. The voltage detection circuit obtains the voltage signal of the lithium battery and the dry battery and sends it to the control chip.

3. A flashlight circuit for switching power supply according to claim 2, characterized in that: The control chip is connected to a power display circuit, which includes two groups of indicator light groups corresponding to the lithium battery power and the dry battery power respectively. The control chip controls the indicator light groups to work according to the voltage signals of the lithium battery and the dry battery.

4. A flashlight circuit for switching power supply according to claim 1, characterized in that: The control chip is connected to the COB circuit.

5. A flashlight circuit for switching power supply according to claim 1, characterized in that: It also includes a charging and discharging circuit connected to the control chip, wherein the charging and discharging circuit includes a charging USB interface and a discharging USB interface, and the charging and discharging circuit is connected to the power supply switching circuit.

6. A flashlight circuit for switching power supply according to claim 1, characterized in that: A power supply interface is provided, and the power supply interface is respectively connected to the positive and negative electrodes of the lithium battery and the positive and negative electrodes of the dry battery.

7. A flashlight circuit for switching power supply according to claim 1 or 6, characterized in that: The power supply switching circuit includes a third field effect transistor, a fifth field effect transistor and a sixth transistor. The positive electrode of the dry battery is connected to the source of the third field effect transistor through a first diode, and the drain of the third field effect transistor outputs the battery power.

8. A flashlight circuit for switching power supply according to claim 7, characterized in that: The positive electrode of the dry cell is connected to the source of the fifth field effect tube, the gate of the fifth field effect tube is connected to the collector of the sixth transistor, the emitter of the sixth transistor is grounded, and the base of the sixth transistor is connected to the control chip through the fourteenth resistor.

9. A flashlight circuit for switching power supply according to claim 1 or 6, characterized in that: The power supply switching circuit includes a first field effect transistor, a fourth field effect transistor, a second transistor and an eighth transistor. The positive electrode of the lithium battery is connected to the drain of the first field effect transistor, the gate of the first field effect transistor is connected to the collector of the second transistor, the source of the first field effect transistor outputs the battery power, and the base of the second transistor is connected to the control chip.

10. A flashlight circuit for switching power supply according to claim 9, characterized in that: The positive electrode of the lithium battery is connected to the source of the fourth field effect transistor, the gate of the fourth field effect transistor is connected to the collector of the eighth transistor, the emitter of the eighth transistor is grounded, and the base of the eighth transistor is connected to the control chip through the thirteenth resistor.

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