Electric tool

Abstract

The utility model discloses an electric tool, which comprises a main body for being held by a user; the working head is connected with the main body; the metal detection module is arranged on the working head and used for detecting metal within the working range of the working head and generating a detection signal; the control module is connected with the metal detection module and used for receiving the detection signal and braking the working head when it is determined that metal exists in the working range of the working head according to the detection signal. The metal detection module is arranged on the working head of the electric tool, the metal in the working range of the working head is detected through the metal detection module, the detection signal is generated and transmitted to the control module, and when the control module determines that the metal exists in the working range of the working head through the detection signal, the working head of the electric tool is braked; therefore, an operator can be prevented from touching a metal object by mistake by using the electric tool, the electric tool is further prevented from being damaged, and the safety of the operator of the electric tool during operation is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tools, in particular to an electric tool. BACKGROUND

[0002] With the development of technology, electric tools are applied more and more widely. While the electric tools improve production efficiency, there is also a certain risk. For example, in field operation, if a metal object is accidentally touched, the metal object may cause damage to the working head of the electric tool. If the touched metal object is a high-voltage transmission line, not only the safety of the operator himself is seriously threatened, but also a power failure accident may be caused, thereby causing great economic losses. CONTENT OF THE INVENTION

[0003] In view of this, the present application provides an electric tool for avoiding the electric tool from touching a metal object during operation, thereby avoiding damage to the electric tool and improving the safety of the electric tool operator during operation. The technical solution of the present application is as follows:

[0004] The first aspect of the present application provides an electric tool, comprising: a main body for a user to hold; a working head connected with the main body; a metal detection module arranged on the working head, for detecting metal within the working range of the working head and generating a detection signal; and a control module connected with the metal detection module, for receiving the detection signal and braking the working head when it is determined that there is metal within the working range of the working head according to the detection signal.

[0005] In an embodiment of the present application, the working head comprises a first blade and a second blade, the metal detection module is used for detecting metal between the first blade and the second blade, and the metal detection module comprises a signal transmitter and a signal receiver; the signal transmitter is arranged on the first blade, and the signal receiver is arranged on the second blade; the signal transmitter is used for outputting a preset type signal, and the signal receiver is used for receiving the preset type signal and converting it into the detection signal.

[0006] In an embodiment of the present application, the signal transmitter comprises an electromagnetic coil, the signal receiver comprises a Hall element, and the preset type signal is an electromagnetic signal.

[0007] In an embodiment of the present application, an installation groove is arranged at the cutting edge of the first blade, the electromagnetic coil is arranged in the installation groove after being wrapped by an insulating material; and a receiving groove is arranged at the cutting edge of the second blade, and the Hall element is arranged in the receiving groove after being wrapped by the insulating material.

[0008] In an embodiment of the present application, the detection signal is a voltage signal, and the control module is configured to determine that metal exists in the working range of the working head when the voltage signal exceeds a preset voltage range.

[0009] In an embodiment of the present application, the power tool further comprises a motor and a transmission mechanism connected to the motor, the motor is connected to the control module, and the motor is connected to the working head through the transmission mechanism, the motor is configured to receive the control signal of the control module and drive the working head to move according to the control signal.

[0010] In an embodiment of the present application, the control module is further configured to detect a motor stroke of the motor, determine a movement stroke of the working head according to the motor stroke, and determine whether metal exists in the working range of the working head according to the movement stroke and the detection signal.

[0011] In an embodiment of the present application, the power tool further comprises a stroke detection module, the stroke detection module is arranged on the working head and connected to the control module, and is configured to detect the movement stroke of the working head; the control module is further configured to determine whether metal exists in the working range of the working head according to the movement stroke and the detection signal.

[0012] In an embodiment of the present application, the stroke detection module comprises a potentiometer.

[0013] In an embodiment of the present application, the power tool further comprises an alarm module, the alarm module is connected to the control module, and the control module is further configured to drive the alarm module to output preset alarm information when it is determined that metal exists in the working range of the working head.

[0014] The present application sets a metal detection module on the working head of the power tool, detects metal in the working range of the working head through the metal detection module, generates a detection signal and transmits it to the control module, and the control module brakes the working head of the power tool when it is determined that metal exists in the working range of the working head through the detection signal, so as to avoid that the operator touches metal objects by mistake by using the power tool, and thus the damage of the power tool is avoided, and the safety of the operator during operation is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic block diagram of a power tool provided by an embodiment of the present application;

[0016] Figure 2 is a structural schematic diagram of a power tool provided by an embodiment of the present application;

[0017] Figure 3 is a schematic block diagram of another power tool provided by an embodiment of the present application;

[0018] Figure 4 is a signal curve schematic diagram provided by an embodiment of the present application.

[0019] Figure 5 is a schematic block diagram of a third electric tool provided by an embodiment of the present application. DETAILED DESCRIPTION

[0020] It should be noted that “at least one” in the embodiments of the present application means one or more, and “multiple” means two or more than two. “And / or” describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural. The terms “first”, “second”, “third”, “fourth” and the like (if any) in the specification and claims of the present application and the drawings are used to distinguish similar objects, and are not used to describe a specific order or sequence.

[0021] In addition, it should be noted that the method disclosed in the embodiments of the present application or the method shown in the flowchart includes one or more steps for implementing the method, and the execution order of the multiple steps can be interchanged with each other without departing from the scope of the claims, and some steps can also be deleted.

[0022] With the development of technology, electric tools are applied more and more widely. While electric tools improve production efficiency, there is also a certain risk, for example, in field work, if a metal object is accidentally touched, the metal object may cause damage to the working head of the electric tool, and if the touched metal object is a high-voltage transmission line, not only the safety of the operator himself is seriously threatened, but also a power failure accident may be caused, thereby causing great economic losses.

[0023] The present application provides an electric tool for avoiding accidental touching of a metal object during work of the electric tool, thereby avoiding damage to the electric tool and improving the safety of the electric tool operator during work.

[0024] Please refer to Figure 1 , Figure 1 is a schematic block diagram of an electric tool provided by an embodiment of the present application. Wherein, the electric tool 100 includes a metal detection module 110, a control module 120, a working head 130 and a main body 140.

[0025] In the embodiments of the present application, the main body 140 is used for a user to hold, and the working head 130 is connected with the main body 140. The metal detection module 110 is arranged on the working head 130 of the electric tool 100, and is used for detecting metal in the working range of the working head 130 and generating a detection signal. The control module 120 is connected with the metal detection module 110, and can be arranged in the main body 140, and is used for receiving the detection signal, and braking the working head 130 when it is determined according to the detection signal that there is metal in the working range of the working head 130.

[0026] For example, when the electric tool 100 is an electric scissors, as shown in FIG. 1, the working head 130 is a blade head of the electric scissors, and the working head 130 includes a first blade 131 and a second blade 132. The control module 120 brakes the blade head of the electric scissors when it is determined according to the detection signal that there is metal in the working range of the blade head of the electric scissors, i.e., when there is metal between the first blade 131 and the second blade during operation of the first blade 131 and the second blade, and can also control the blade head of the electric scissors to open, so as to avoid that the electric scissors mistakenly cut a metal object. Figure 2

[0027] It can be understood that, by arranging the metal detection module 110 on the working head 130 of the electric tool 100, detecting metal in the working range of the working head 130 by the metal detection module 110, and generating a detection signal transmitted to the control module 120, the control module 120 brakes the working head 130 of the electric tool 100 when it is determined according to the detection signal that there is metal in the preset range of the working head 130, so that the operator can avoid mistakenly touching a metal object by using the electric tool 100, and thus the damage of the electric tool 100 is avoided, and the safety of the operator during operation of the electric tool 100 is improved.

[0028] In some embodiments, as shown in FIG. 2, the metal detection module 110 includes a signal transmitter 111 and a signal receiver 112. Figure 2

[0029] The signal transmitter 111 is arranged on the first blade 131, and the signal receiver 112 is arranged on the second blade 132. The signal transmitter 111 is used for outputting a preset type signal, and the signal receiver 112 is used for receiving the preset type signal and converting it into a detection signal.

[0030] In some embodiments, the signal transmitter 111 includes an electromagnetic coil, the signal receiver 112 includes a Hall element, and the preset type signal is an electromagnetic signal. The first blade 131 is provided with a mounting groove at the blade edge, the electromagnetic coil is arranged in the mounting groove after being wrapped by an insulating material, the second blade 132 is provided with a containing groove at the blade edge, and the Hall element is arranged in the containing groove after being wrapped by an insulating material. The insulating material includes epoxy resin, which is not limited here. ​​

[0031] In some embodiments, the detection signal is a voltage signal, and the control module 120 is configured to determine that there is metal in the working range of the working head 130 when the voltage signal is out of a preset voltage range.

[0032] In the embodiments of the present application, the power tool 100 further comprises a motor, the motor is connected to the control module 120 and connected to the working head 130 through a transmission mechanism, and the motor is configured to receive a control signal from the control module 120 and drive the working head 130 to move according to the control signal. For example, when the power tool 100 is an electric scissors, the motor drives the opening or closing of the blade head of the electric scissors.

[0033] In some embodiments, the control module 120 is further configured to detect a motor stroke of the motor, determine a movement stroke of the working head 130 according to the motor stroke, and determine whether there is metal in the working range of the working head 130 according to the movement stroke and the detection signal.

[0034] In some embodiments, as shown in Figure 3 The power tool 100 further comprises a stroke detection module 150, the stroke detection module 150 is arranged in the working head 130 and connected to the control module 120, and is configured to detect the movement stroke of the working head 130. The control module 120 is further configured to determine whether there is metal in the working range of the working head 130 according to the movement stroke and the detection signal. The stroke detection module 150 comprises a potentiometer.

[0035] As shown in Figure 4 A relationship diagram between the voltage signal and the movement stroke is provided in the embodiments of the present application, it is not difficult to see that when there is no metal object in the working range of the working head 130, the voltage signal is a smooth curve according to the movement stroke, and if there is a metal object in the working range of the working head 130, the magnetic field of the metal object is disturbed, and the voltage signal changes, which is an irregular curve.

[0036] In some embodiments, as shown in Figure 5 The power tool 100 further comprises an alarm module 160, the alarm module 160 is connected to the control module 120 and can be arranged in the main body 140, and the control module 120 is further configured to drive the alarm module 160 to emit preset alarm information when it is determined that there is metal in the working range of the working head 130. The preset alarm information includes at least one of sound, vibration and light.

[0037] The above embodiments are only preferred embodiment modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A power tool characterized by comprising: The electric tool comprises: a main body for a user to hold; a working head connected with the main body; a metal detection module arranged on the working head, for detecting metal in a working range of the working head and generating a detection signal; a control module connected with the metal detection module, for receiving the detection signal, and braking the working head when it is determined that there is metal in the working range of the working head according to the detection signal.

2. The power tool of claim 1, wherein, The working head comprises a first blade and a second blade, the metal detection module is used for detecting metal between the first blade and the second blade when the first blade and the second blade are working, and the metal detection module comprises a signal transmitter and a signal receiver; The signal transmitter is arranged on the first blade, and the signal receiver is arranged on the second blade; The signal transmitter is used for outputting a preset type signal, and the signal receiver is used for receiving the preset type signal and converting it into the detection signal.

3. The power tool of claim 2, wherein, The signal transmitter comprises an electromagnetic coil, the signal receiver comprises a Hall element, and the preset type signal is an electromagnetic signal.

4. The power tool of claim 3, wherein, An installation groove is arranged at a blade edge of the first blade, and the electromagnetic coil is arranged in the installation groove after being wrapped by insulation material; An accommodation groove is arranged at a blade edge of the second blade, and the Hall element is arranged in the accommodation groove after being wrapped by the insulation material.

5. The power tool of claim 3, wherein, The detection signal is a voltage signal, and the control module is used for determining that there is metal in the working range of the working head when it is determined that the voltage signal exceeds a preset voltage range.

6. The power tool of claim 1, wherein, The electric tool further comprises a motor and a transmission mechanism connected with the motor, the motor is connected with the control module, the motor is connected to the working head through the transmission mechanism, the motor is used for receiving a control signal of the control module and driving the working head to move according to the control signal.

7. The power tool of claim 6, wherein, The control module is further used for detecting a motor stroke of the motor, determining a movement stroke of the working head according to the motor stroke, and determining whether there is metal in the working range of the working head according to the movement stroke and the detection signal.

8. The power tool of claim 1, wherein, Further comprising a stroke detection module arranged on the working head and connected with the control module, for detecting the movement stroke of the working head; The control module is further used for determining whether there is metal in the working range of the working head according to the movement stroke and the detection signal.

9. The power tool of claim 8, wherein, The stroke detection module comprises a potentiometer.

10. The power tool of any one of claims 1 to 9, wherein, Further comprising an alarm module connected with the control module, and the control module is further used for driving the alarm module to emit preset alarm information when it is determined that there is metal in the working range of the working head.

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