CN213813762U

CN213813762U - Chain saw with under-pressure early warning function

Info

Publication number: CN213813762U
Application number: CN202022484938.9U
Authority: CN
Inventors: 郝才生
Original assignee: Shenzhen Topband Co Ltd
Current assignee: Shenzhen Topband Co Ltd
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-07-27
Anticipated expiration: 2030-10-30

Abstract

The utility model relates to a take chain saw of under-voltage early warning, include: the warning circuit comprises a chain saw shell, a battery pack arranged in the chain saw shell, a voltage detection circuit connected with the battery pack and a chain saw working driving circuit, an MCU controller connected with the voltage detection circuit and the chain saw working driving circuit, a chain saw working circuit connected with the chain saw working driving circuit and a warning circuit connected with the MCU controller, wherein the warning circuit comprises one or more of a first warning circuit used for providing a light warning signal, a second warning circuit used for providing a sound signal and a third warning circuit used for providing a vibration signal; the chain saw shell comprises a chain saw body and a handle with one end connected with the chain saw body, and the warning device in the warning circuit is arranged in the handle. Implement the utility model discloses can be simple swift under-voltage the chain saw indicate.

Description

Chain saw with under-pressure early warning function

Technical Field

The utility model relates to a chain saw technical field, more specifically say, relate to a chain saw of area under-voltage early warning.

Background

Current chain saw is in the use, and its unable audio-visual acquisition of the condition that the electric quantity is not enough appears to the current electric quantity of chain saw, and it is usually need to go to look over the electric quantity through the people and just can learn that the battery electric quantity is not enough. In the using process of the electric saw, the phenomenon that the electric saw is shut down due to sudden undervoltage protection in the using process of the tool caused by the fact that people forget to check the confirmation often occurs. At this time, if the tool is still used after the electric quantity is insufficient, the discharging current load of the battery pack is too heavy, and the heating phenomenon is obvious.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned partial technical defect of prior art, provide a chain saw of taking under-voltage early warning.

The utility model provides a technical scheme that its technical problem adopted is: constructing a chain saw with under-pressure pre-warning, comprising: the warning circuit comprises one or more of a first warning circuit used for providing a light warning signal, a second warning circuit used for providing a sound signal and a third warning circuit used for providing a vibration signal, the chain saw shell comprises a chain saw body and a handle with one end connected with the chain saw body, and a warning device in the warning circuit is arranged in the handle.

Preferably, the voltage detection circuit includes a resistor R1, a resistor R2, a resistor R3 and a capacitor C1, the first end of the resistor R1 is connected to the output end of the battery pack, the second end of the resistor R1 is grounded through the resistor R2, the second end of the resistor R1 is further connected to the first end of the resistor R3, the second end of the resistor R3 is connected to the MCU controller, and the second end of the resistor R3 is further grounded through the capacitor C1.

Preferably, the voltage detection circuit comprises a battery pack communication circuit integrated in the battery pack, and the battery pack communication circuit is connected with the MCU controller.

Preferably, the first warning circuit comprises a light emitting diode D13, a triode NQ1, a resistor R13, a resistor R14 and a resistor R15;

the positive pole of the light emitting diode D13 is connected with a power supply, the negative pole of the light emitting diode D13 is connected with the collector of the triode NQ1 through the resistor R13, the base of the triode NQ1 is connected with the MCU controller through the resistor R14, the emitter of the triode NQ1 is grounded, and the base of the triode NQ1 is grounded through the resistor R15.

Preferably, a connecting portion of the handle and the chainsaw body is provided with a first hole, and the light emitting diode D13 is exposed out of the chainsaw housing from the first hole.

Preferably, the second warning circuit comprises a buzzer LS1, a triode NQ3, a resistor R31, a resistor R32 and a resistor R33;

the first end of the buzzer LS1 is connected with a power supply, the second end of the buzzer LS1 is connected with the collector of the triode NQ3 through the resistor R33, the base of the triode NQ3 is connected with the MCU controller through the resistor R31, the emitter of the triode NQ3 is grounded, and the base of the triode NQ3 is grounded through the resistor R32.

Preferably, a connecting portion of the handle and the chain saw body is provided with a second hole, and the buzzer LS1 is exposed out of the chain saw housing from the second hole.

Preferably, the third warning circuit comprises a motor M1, a transistor NQ2, a resistor R21, a resistor R22 and a resistor R23;

the first end of the motor M1 is connected with a power supply, the second end of the motor M1 is connected with the collector of a triode NQ2 through a resistor R23, the base of the triode NQ2 is connected with the MCU controller through a resistor R21, the emitter of the triode NQ2 is grounded, and the base of the triode NQ2 is grounded through a resistor R22.

Preferably, the motor M1 is provided on the hand-held portion of the handle.

The MCU controller is also configured to time the alarm time of the alarm circuit and output a control level when the time meets a preset time length so as to turn off the chain saw working driving circuit.

Implement the utility model discloses a chain saw of under-voltage early warning in area has following beneficial effect: can be simple swift under-voltage the chain saw indicate.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

FIG. 1 is a logic block diagram of an embodiment of a chain saw with under-pressure warning of the present invention;

FIG. 2 is a schematic circuit diagram of an embodiment of a chain saw with under-voltage warning of the present invention;

FIG. 3 is a schematic circuit diagram of another embodiment of a chain saw with under-voltage warning of the present invention;

fig. 4 is a schematic structural diagram of an embodiment of the chain saw with under-pressure warning of the present invention.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, in a first embodiment of the chain saw with under-pressure warning of the present invention, the chain saw includes: a chainsaw housing, a battery pack 140 disposed inside the chainsaw housing, a voltage detection circuit 110 and a chainsaw operation driving circuit 160 connected to the battery pack 140, an MCU controller 120 connected to the voltage detection circuit 110 and the chainsaw operation driving circuit 160, a chainsaw operation circuit 170 connected to the chainsaw operation driving circuit 160, and an alarm circuit 130 connected to the MCU controller 120, wherein the alarm circuit 130 includes one or more of a first alarm circuit 131 for providing a light alarm signal, a second alarm circuit 132 for providing a sound signal, and a second alarm circuit 133 for providing a vibration signal, the chainsaw housing includes a chainsaw body 210 and a handle 220 having one end connected to the chainsaw body 210, and an alarm device in the chainsaw alarm circuit is disposed in the handle. Specifically, a battery pack 140 is disposed in the chainsaw housing for supplying power, an output of the battery pack 140 is connected to a chainsaw operation driving circuit 160, and the output is controlled by a driving control level generated by the MCU 120 to supply power to a chainsaw operation circuit 170, such as an operation motor. The power output of the battery pack 140 is voltage-converted by the power conversion circuit 150 to supply power to other internal circuits. In the working process, the voltage detection circuit 110 may detect the battery voltage corresponding to the battery pack 140, and configure an alarm threshold of the voltage in the MCU controller 120 in advance. When the MCU controller 120 detects that the voltage corresponding to the battery pack 140 is lower than the warning threshold, the output control level controls the warning circuit 130 to generate a warning signal to prompt the user that the voltage of the chain saw is too low. The user can stop using the alarm signal in time after receiving the alarm signal, and can charge according to the requirement. Wherein the alarm circuit 130 is arranged in the housing of the chain saw, the alarm signal generating device of which is arranged in the handle. The alarm circuit 130 may generate an optical signal for an alarm through the first alarm circuit 131, may generate a vibration signal for an alarm through the third alarm circuit 133, and may generate an acoustic signal for an alarm through the second alarm circuit 132. Multiple alarms may also be implemented by any two or more of the first alarm circuit 131, the second alarm circuit 132, and the third alarm circuit 133 in combination.

As shown in fig. 2, in an embodiment, the voltage detection circuit 110 includes a resistor R1, a resistor R2, a resistor R3, and a capacitor C1, a first end of the resistor R1 is connected to the output terminal of the battery pack 140, a second end of the resistor R1 is grounded via the resistor R2, a second end of the resistor R1 is further connected to the first end of the resistor R3, a second end of the resistor R3 is connected to the MCU controller 120, and a second end of the resistor R3 is further grounded via the capacitor C1. Specifically, the voltage divider circuit formed by the resistor R1 and the resistor R2 connected in series obtains the output voltage at the output end of the battery pack 140, and the MCU controller 120 determines whether the voltage meets the alarm threshold after receiving the output voltage, and generates a corresponding control level when the voltage meets the alarm threshold to drive the alarm circuit 130 to operate.

As shown in fig. 3, in an embodiment, the voltage detection circuit 110 includes a battery pack 140 communication circuit integrated in the battery pack 140, and the battery pack 140 communication circuit is connected to the MCU controller 120. Specifically, a battery pack 140 communication circuit for detecting information of the battery pack 140 is disposed in the battery pack 140, wherein the MCU 120 may be connected to the battery pack 140 communication circuit to obtain voltage information of the battery pack 140, determine whether the voltage of the battery pack 140 satisfies an alarm threshold according to the voltage information, and generate a corresponding control level to drive the alarm circuit 130 to operate when the voltage satisfies the alarm threshold.

Optionally, the first warning circuit 131 includes a light emitting diode D13, a transistor NQ1, a resistor R13, a resistor R14, and a resistor R15; the positive electrode of the light emitting diode D13 is connected with a power supply, the negative electrode of the light emitting diode D13 is connected with the collector of the triode NQ1 through the resistor R13, the base of the triode NQ1 is connected with the MCU controller 120 through the resistor R14, the emitter of the triode NQ1 is grounded, and the base of the triode NQ1 is grounded through the resistor R15. Specifically, when the voltage alarm threshold set by the MCU controller 120 is not triggered, the transistor NQ1 is turned off, and the light emitting diode D13 does not pass current at this time, and its output off state does not emit light, and when the voltage alarm threshold set by the MCU controller 120 is triggered, its output control level makes the transistor NQ1 turned on, and the light emitting diode D13 is powered on to emit light, that is, a corresponding light signal is generated to indicate that the voltage is under-voltage.

As shown in fig. 3, a first hole 231 is formed at a connection portion of the handle 220 and the chainsaw body 210, and the led D13 is exposed from the chainsaw housing through the first hole 231. Specifically, the light emitting diode D13 may be exposed from the first hole 231, wherein the first hole 231 is disposed at the connection portion of the chainsaw handle 220 and the chainsaw body 210. It is understood that the exposed portion may be exposed from the surface of the housing, or may be in communication with the outside through the first hole 231.

Optionally, the second warning circuit 132 includes a buzzer LS1, a transistor NQ3, a resistor R31, a resistor R32, and a resistor R33; the first end of the buzzer LS1 is connected with a power supply, the second end of the buzzer LS1 is connected with the collector of the triode NQ3 through the resistor R33, the base of the triode NQ3 is connected with the MCU controller 120 through the resistor R31, the emitter of the triode NQ3 is grounded, and the base of the triode NQ3 is grounded through the resistor R32. Specifically, when the voltage alarm threshold set by the MCU controller 120 is not triggered, the transistor NQ3 is turned off, the buzzer LS1 does not have a power supply to pass through at this time, and it does not sound in an off state, and when the voltage alarm threshold set by the MCU controller 120 is triggered, its output control level makes the transistor NQ3 turned on, and the buzzer LS1 is powered on to sound, i.e., generates a corresponding sound signal to prompt that the voltage is under-voltage.

Optionally, the handle 220 is connected to the second hole 232 of the connecting portion of the chainsaw body 210, and the buzzer LS1 is exposed from the second hole 232 of the chainsaw housing. Specifically, the buzzer LS1 may be exposed from the second hole 232, wherein the second hole 232 is disposed at the connection portion of the chainsaw handle 220 and the chainsaw body 210. It is understood that the exposed portion may be the structure exposed from the surface of the housing, or may be the second hole 232 communicating with the outside.

Optionally, the third warning circuit 133 includes a motor M1, a transistor NQ2, a resistor R21, a resistor R22, and a resistor R23; the first end of the motor M1 is connected with a power supply, the second end of the motor M1 is connected with the collector of a triode NQ2 through the resistor R23, the base of the triode NQ2 is connected with the MCU controller 120 through the resistor R21, the emitter of the triode NQ2 is grounded, and the base of the triode NQ2 is grounded through the resistor R22. Specifically, when the voltage alarm threshold set by the MCU controller 120 is not triggered, the transistor NQ2 is turned off, no current passes through the motor M1 at this time, and the motor M1 is in an off state and does not vibrate, and when the voltage alarm threshold set by the MCU controller 120 is triggered, the output control level of the motor M3578 switches on the transistor NQ2, and the motor M1 is electrically vibrated to generate a corresponding vibration signal to indicate that the voltage is under-voltage.

Optionally, the motor M1 is disposed on the handle portion of the handle. Specifically, the motor M1 is disposed on the handle 233 of the handle 220, and when the user holds the chain saw, the motor M1 can directly sense the vibration to know the voltage under-voltage.

Optionally, the MCU controller 120 is further configured to time the warning time of the warning circuit and output a control level to turn off the chainsaw operation driving circuit when the time satisfies a preset time duration. Specifically, when the output control level controls the alarm circuit to generate the alarm signal, the MCU controller 120 simultaneously times the output time of the control level, for example, after 1 to 3 seconds of alarm, generates the control level to control the chain saw operating circuit to turn off, and stops outputting the driving signal, so as to power off and stop the chain saw operating circuit, such as the operating motor.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The utility model provides a chain saw of area under-pressure early warning which characterized in that includes: the warning circuit comprises a chain saw shell, a battery pack arranged in the chain saw shell, a voltage detection circuit and a chain saw working driving circuit which are connected with the battery pack, an MCU controller connected with the voltage detection circuit and the chain saw working driving circuit, a chain saw working circuit connected with the chain saw working driving circuit, and a warning circuit connected with the MCU controller, wherein the warning circuit comprises one or more of a first warning circuit used for providing a light warning signal, a second warning circuit used for providing a sound signal and a third warning circuit used for providing a vibration signal; the chain saw shell comprises a chain saw body and a handle, one end of the handle is connected with the chain saw body, and an alarm device in the alarm circuit is arranged in the handle.

2. The chain saw with the under-voltage warning function according to claim 1, wherein the voltage detection circuit comprises a resistor R1, a resistor R2, a resistor R3 and a capacitor C1, a first end of the resistor R1 is connected with an output end of the battery pack, a second end of the resistor R1 is grounded through the resistor R2, a second end of the resistor R1 is further connected with a first end of the resistor R3, a second end of the resistor R3 is connected with the MCU controller, and a second end of the resistor R3 is further grounded through the capacitor C1.

3. The chain saw with under-voltage warning as recited in claim 1 wherein the voltage detection circuit comprises a battery pack communication circuit integrated within the battery pack, the battery pack communication circuit coupled to the MCU controller.

4. The chain saw with under-voltage warning as recited in claim 1, wherein the first warning circuit comprises a light emitting diode D13, a transistor NQ1, a resistor R13, a resistor R14, and a resistor R15;

5. The chain saw with the under-pressure warning function according to claim 4, wherein a first hole is formed in a connecting portion of the handle and the chain saw body, and the light emitting diode D13 is exposed out of the chain saw housing from the first hole.

6. The chain saw with under-voltage warning as recited in claim 1, wherein the second warning circuit comprises a buzzer LS1, a transistor NQ3, a resistor R31, a resistor R32 and a resistor R33;

7. The chain saw with the under-pressure warning function according to claim 6, wherein a second hole is formed in a connecting portion of the handle and the chain saw body, and the buzzer LS1 is exposed out of the chain saw shell from the second hole.

8. The chain saw with under-voltage warning as recited in claim 1, wherein the third warning circuit comprises a motor M1, a transistor NQ2, a resistor R21, a resistor R22, and a resistor R23;

9. The chain saw with under-pressure warning as recited in claim 8 wherein the motor M1 is disposed on a hand-held portion of the handle.

10. The chainsaw with under-voltage warning of claim 1, wherein the MCU controller is further configured to time an alarm time of the alarm circuit and output a control level to turn off the chainsaw operating drive circuit when the time meets a preset time duration.