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A combination of electric tools includes a first electric tool and a second electric tool respectively having an independent power supply. The second electric tool starts working automatically responding to the startup of the first electric tool. Thereby the second electric tool starts automatically

A combination of electric tools includes a first electric tool and a second electric tool respectively having an independent power supply. The second electric tool starts working automatically responding to the startup of the first electric tool. Thereby the second electric tool starts automatically after the first electric tool is started to operate by a user without an extra operation of the user, which is convenient to the user.

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1. A combination of electric tools, comprising: a first electric tool and a second electric tool respectively having an independent power supply, the second electric tool starting working automatically responding to the startup of the first electric tool,wherein the second electric tool comprises: a

1. A combination of electric tools, comprising: a first electric tool and a second electric tool respectively having an independent power supply, the second electric tool starting working automatically responding to the startup of the first electric tool,wherein the second electric tool comprises: a control module which automatically starts the second electric tool by detecting vibration generated by the startup of the first electric tool, wherein the control module comprise a sound control module which receives sound signals generated by vibration to automatically start the second electric tool, wherein the second electric tool comprises a switch controlling the startup of the second electric tool; the sound control module comprises: a sound sensor which converts the sensed sound signal into the sensing signal and output the sensing signal, wherein the sound control module also comprises a delay circuit capable of counting time; when the sensing signal output by the sound sensor lasts a preset time length, the sound control module controls the switch to be energized. 2. The combination of electric tools according to claim 1, wherein the second electric tool stops working automatically responding to the stopping of the first electric tool. 3. The combination of electric tools according to claim 2, wherein the sound control module comprises: a signal amplification circuit which is connected with the sound sensor and the switch and amplifies and outputs the sensing signal to the switch. 4. The combination of electric tools according to claim 3, wherein the sound control module also comprises a comparator which is electrically connected between the signal amplification circuit and the switch; the comparator compares the voltage of the sensing signal with a preset reference voltage; and when the voltage of the sensing signal is greater than the reference voltage, the sound control module controls the switch to be energized. 5. The combination of electric tools according to claim 2, wherein the sound control module comprises: a sound sensor, converting the sensed sound signal into an analog signal;a signal amplification circuit, electrically connected with the sound sensor, and amplifying the sensing signal by a fixed factor;an analog-digital conversion circuit, electrically connected with the signal amplification circuit, receiving the sensing signal and converting the analog signal into a digital signal;a memorizer, storing a preset condition; anda processor, electrically connected with the analog-digital conversion circuit and the memorizer, receiving the digital signal, reading the preset condition, and when the digital signal meets the preset condition, controlling the second electric tool to be started. 6. The combination of electric tools according to claim 5, wherein the preset condition is at least one feature value of the sound signal, and the feature value is the frequency, amplitude, period, peak value, valley value, or optional combinations thereof. 7. The combination of electric tools according to claim 5, wherein the sound control module also comprises a filter circuit which is electrically connected between the sound sensor and the analog-digital conversion circuit. 8. The combination of electric tools according to claim 5, wherein the second electronic tool is operable to store the frequency, amplitude, period, peak value, valley value of the sound signal, or optional combinations thereof into the memorizer as the preset condition. 9. The combination of electric tools according to claim 2, wherein the second electric tool is a vacuum cleaner, and the vacuum cleaner also comprises: a battery pack as the power supply of the second electric tool;a body for vacuuming;a hose installed on the body, the hose comprises a tool connection end which is connected with the first electric tool. 10. The combination of electric tools according to claim 1, wherein the control module comprises a vibration control module which directly detects the vibration to automatically start the second electric tool. 11. The combination of electric tools according to claim 10, wherein the second electric tool comprises a switch controlling the startup of the second electric tool; the vibration control module comprises a vibration sensor which detects the vibration and outputs a sensing signal, and a signal amplification circuit which is connected with the vibration sensor and the switch, amplifying and outputting the sensing signal to the switch, and turning on the switch. 12. The combinations of electric tools according to claim 11, wherein the vibration control module also comprises a comparator which is electrically connected between the signal amplification circuit and the switch; the comparator compares the voltage of the sensing signal with a preset reference voltage; and when the voltage of the sensing signal is greater than the reference voltage, the vibration control module controls the switch to be energized. 13. The combinations of electric tools according to claim 1, wherein the first electric tool is selected from one of the following: sander, table saw, miter saw, electric circular saw, jig saw, angle grinder, electric router, electric hammer, electric drill, electric planer, belt sander, table jig saw, or marble stone machine. 14. The combinations of electric tools according to claim 13, wherein the second electric tool is selected from one of the following: vacuum cleaner, water gun, blower, or portable working lamp.