Cutting machine and method for controlling the cutting machine

Abstract

The present invention provides a cutting machine and a method for controlling the cutting machine. [Solution] The disclosed cutting machine may include: a cutting section configured to cut a cable and including first and second blades that receive the voltage of an electrostatic charge generated from the cable; an amplification section that amplifies a signal relating to the voltage of the electrostatic charge sensed by the cutting section; a live-line sensing section that determines whether the cable is live or not based on the signal amplified by the amplification section; a power supply section that supplies power to the cutting section; and a control section configured to shut off the power supplied to the cutting section when the live-line sensing section determines that the cable is live.

Description

Technical Field

[0001] The present invention relates to a cutting machine and a control method thereof, and more particularly to a cutting machine configured separately to sense whether a cable is live without an externally exposed antenna.

Background Art

[0002] A cable is a general term for lines used to transmit electric power or electrical signals. Generally, cables can be classified into bare wires and insulated wires. Among these, a bare wire is a cable without an insulating coating on a conductor and is used for special high-voltage transmission lines or trolley lines. An insulated wire is a cable with an insulating coating on a conductor so that electricity does not leak outside and is widely used in indoor facilities. The conductor constituting the cable is made of copper with low electrical resistance, and the insulating coating can be made of rubber, polyethylene, or the like. On the other hand, when installing new electrical equipment or repairing or removing existing electrical equipment, it is also necessary to install a new cable to supply power to the new electrical equipment or replace or remove the existing cable that supplies power to the existing electrical equipment. In this case, before performing the work of installing, replacing, or removing the cable, an inspection must be performed in advance to check whether electricity is flowing through the cable corresponding to the work target (that is, whether it is a live wire) for the safety of the operator or the electrical equipment. However, there are problems in that safety accidents occur due to non-compliance with management operation regulations (SOP, Standard Operating Procedure), operator's judgment errors, cable cutting errors, and the like. To solve such problems, recently, an electroscope for inspecting whether a cable corresponding to the work target is a live wire has been developed, but there is a need for research to zeroize the accident occurrence probability and minimize human and material damage.

Summary of the Invention

[0003] The problem that this invention aims to solve is to provide a cutting machine with improved reliability.

[0004] The problem that this invention aims to solve is to provide a control method for a cutting machine with improved reliability.

[0005] Furthermore, the problems that the technical concept of this invention aims to solve are not limited to those mentioned above, and other problems can be clearly understood by an ordinary person from the following description. [Means for solving the problem]

[0006] According to one embodiment, the cutting machine may include: a cutting section configured to cut a cable and including first and second blades that receive the voltage of the electrostatic charge generated from the cable; an amplification section that amplifies a signal relating to the voltage of the electrostatic charge sensed by the cutting section; a live-line sensing section that determines whether the cable is live or not based on the signal amplified by the amplification section; a power supply section that supplies power to the cutting section; and a control section configured to shut off the power supplied to the cutting section when the live-line sensing section determines that the cable is live.

[0007] According to one embodiment, the cutting machine includes a cutting section configured to cut a cable and including first and second blades that receive the voltage of the static charge generated from the cable; an amplification section that amplifies a signal relating to the voltage of the static charge sensed by the cutting section; a live-line sensing section that determines whether the cable is live or not based on the signal amplified by the amplification section; a control section that shuts off the power supplied to the cutting section when the live-line sensing section determines that the cable is live; a first main body connected to the lower part of the cutting section; and a second main body disposed below the first main body and including a power supply section. The power supply section supplies power to the cutting section and the control section, respectively, and is configured so that noise generated by the operation of the cutting section does not affect the control section. The voltage of the power supplied to the control section may be smaller than the voltage of the power supplied to the cutting section.

[0008] According to one embodiment, the cutting machine includes a cutting section configured to cut a cable and including first and second blades that receive the voltage of the static charge generated from the cable; an amplification section that amplifies a signal relating to the voltage of the static charge sensed by the cutting section; a live-line sensing section that determines whether the cable is live or not based on the signal amplified by the amplification section; a control section that shuts off the power supplied to the cutting section when the live-line sensing section determines that the cable is live; a first main body connected to the lower part of the cutting section; a second main body disposed below the first main body and including a power supply section; a live-line sensing IC provided in the live-line sensing section; and a microcontrol unit provided in the control section, wherein the power supply section supplies power to the cutting section and the control section, respectively. The system includes a power isolation and pressure reduction module configured to prevent noise from occurring between the power supply unit and the control unit, wherein the control unit and the disconnection unit are connected independently to the power supply unit, and the power isolation and pressure reduction module consists of a switch unit, a battery unit and a power isolation unit that are electrically connected to each other, wherein the magnitude of the first voltage of the battery unit operated by the switch unit is greater than the magnitude of the second voltage transmitted from the battery unit to the power isolation unit, the live-sensing IC and the microcontrol unit are electrically connected to the power isolation unit, and the magnitude of the third voltage transmitted from the power isolation unit to the live-sensing IC and the microcontrol unit may be less than the magnitude of the second voltage. [Brief explanation of the drawing]

[0009] [Figure 1] This figure schematically shows the external components of a cutting machine according to one embodiment of the technical concept of the present invention. [Figure 2] This diagram schematically shows the internal components of a cutting machine according to one embodiment of the technical concept of the present invention. [Figure 3] This is an illustrative diagram illustrating the operating state of a cutting machine according to one embodiment of the technical concept of the present invention. [Figure 4]This is an illustrative diagram illustrating the function of a cutting machine according to one embodiment of the technical concept of the present invention. [Figure 5] This is a conceptual diagram illustrating the detailed process of supplying power to a cutting machine according to one embodiment of the technical concept of the present invention. [Figure 6] This is a conceptual diagram showing the transmission process of a live signal in a cutting machine according to one embodiment of the technical concept of the present invention. [Figure 7] This is a conceptual diagram illustrating the process by which the operation of the cutting section of a cutting machine stops upon receiving a live signal, according to one embodiment of the technical concept of the present invention. [Figure 8] This is a conceptual diagram illustrating the detailed process of supplying power to a cutting machine according to one embodiment of the technical concept of the present invention. [Figure 9] This flowchart shows a control method for a cutting machine according to one embodiment of the technical concept of the present invention. [Figure 10] This flowchart shows a control method for a cutting machine when live wire detection is detected, according to one embodiment of the technical concept of the present invention. [Figure 11] This flowchart shows the steps of supplying power to a cutting machine according to one embodiment of the technical concept of the present invention. [Modes for carrying out the invention]

[0010] This embodiment can be modified in various ways and may take on various forms. While several embodiments are shown and described in detail in the drawings, this is not intended to limit this embodiment to any particular disclosure. Furthermore, the embodiments described below are illustrative, and various modifications are possible from these embodiments.

[0011] All use of illustrative or exemplary terms is solely for the purpose of detailing the technical idea and is not limited by the scope of the claims unless otherwise specified.

[0012] Unless otherwise specified, the vertical direction is defined as the Z direction, and the first horizontal direction and the second horizontal direction may be defined as horizontal directions perpendicular to the Z direction, respectively. The first horizontal direction may be referred to as the X direction, and the second horizontal direction as the Y direction. Vertical level may mean the height level corresponding to the vertical direction (Z direction). Horizontal width may mean the length in the horizontal direction (X direction and / or Y direction), and vertical length may mean the length in the vertical direction (Z direction).

[0013] Figure 1 is a schematic diagram showing the external components of a cutting machine according to one embodiment of the technical concept of the present invention.

[0014] Referring to Figure 1, when installing new electrical equipment or repairing or removing existing electrical equipment, it is also necessary to install new cables to supply power to the new equipment or to replace or remove existing cables that supply power to the existing electrical equipment. In this case, before installing, replacing, or removing cables, it is necessary to first inspect whether the cables are live or not for the safety of the workers or the electrical equipment.

[0015] However, there were problems with safety accidents occurring due to non-compliance with management and operation regulations (SOP, Standard Operating Procedure), errors in worker judgment, and errors in cutting cables.

[0016] To address these issues, electroscopes have recently been developed to inspect whether the cable being worked on is live or not. However, research is still needed to reduce the probability of accidents to zero and minimize human and property damage.

[0017] The live wire detectable cutting machine 100 according to an embodiment of the present invention may include a first main body 10, a second main body 20, and a cutting part 30. To explain each component, the first main body 10 constitutes the main body of the cutting machine 100, and a space that can be gripped by a user is formed. Specifically, the first main body 10 may include a body part 11, a rotating part 12, and a button part 13. The body part 11 may have an appropriate volume so that a user can grip it. The rotating part 12 can rotate the cutting part 30 described later. The button part 13 may be configured to be able to operate the operation of the cutting part. Also, a grounding part 14 may be arranged near the button part 13. When the user grips the cutting machine 100, the grounding part 14 contacts the ground to form a ground, and when the cutting machine 100 operates, a closed loop can be formed.

[0018] The body part 11 is arranged between the second main body 20 and the cutting part 30 and can constitute the main body of the cutting machine 100. The body part 11 may be formed in a cylindrical shape so that it is easy for a user to grip. However, it is not limited thereto, and it may be formed in various shapes such as a hexahedron, a conical shape, etc. that can be gripped by a user. The rotating part 12 is arranged between the body part 11 and the cutting part 30, is rotatably coupled to the body part 11, and is fixedly coupled to the cutting part 30, and can rotate the cutting part 30 around the body part 11. The rotating part 12 can rotate the cutting part 30 in a clockwise or counterclockwise direction about the longitudinal direction of the body part 11.

[0019] The button part 13 may be arranged on the side surface of the body part 11. That is, the button part 13 may be arranged at a position where it can be easily pressed using one of the fingers while the operator grips the body part 11. The button part 13 can convert a physical signal according to the pressure of the operator into an electrical signal and can receive a signal regarding the operation control of the cutting part 30 from the operator.

[0020] The second body 20 can be arranged at one end of the first body 10. Specifically, the second body 20 can be arranged to face the cutting part 30 with the first body 10 as the center. The second body 20 is electrically connected to the cutting part 30 via the first body 10, and may include a main board for function control of the cutting machine 100, a battery for supplying power to each component, etc. inside. The main board 66 may include a control unit 50 and a live wire sensing unit 40 described in FIG. 2. The battery part (61_2 in FIG. 5) will be described in detail in FIG. 5.

[0021] The cutting part 30 may include a plurality of blades for cutting a cable. Specifically, the cutting part 30 may be composed of a cutting body 31, a first blade 32, a second blade 33, a hinge 34 and a warning part 36. The first blade 32 and the second blade 33 can serve as receivers for sensing the voltage of the static charge generated by the cable when the cable is live.

[0022] The cutting body 31 may form a space where the first blade 32, the second blade 33, the hinge 34 and the warning part 36 are arranged. The cutting body 31 is fixedly coupled to the rotating part 12 of the first body 10 and can rotate with the rotation of the rotating part 12 to rotate the first blade 32 and the second blade 33.

[0023] The first blade 32 is arranged to face the second blade 33 and can be fixedly installed on the cutting body 31. Such a first blade 32 can support one side of the cable during the cutting operation. When the cable is live, static charge may be generated before the first blade 32 supports one side of the cable. When static charge is generated in the cable, the first blade 32 can sense the voltage of the static charge. The sensed static charge voltage of the cable is transmitted to the live wire sensing unit and the control unit via the live wire sensing signal transmission part, and the above content will be described in detail in FIG. 2.

[0024] The second blade 33 may be positioned opposite the first blade 32 and rotatably mounted on the cutting body 31. With the second blade 33 positioned on the other side of the cable supported on one side by the first blade 32, it can rotate around the hinge 34 in the direction of the first blade 32 or in the opposite direction to the first blade 32, and together with the first blade 32, it can cut the cable.

[0025] The hinge 34 is fixed and connected to the cutting body 31, and the first blade 32 or the second blade 33 is rotatably connected to it, so that it can serve as an axis for the rotation of the second blade 33.

[0026] The first blade 32 and the second blade 33 can each detect the voltage of the electrostatic charge generated in the cable when the cable is live. Such a pair of blades can detect the voltage of the electrostatic charge formed from the cable when the cable is positioned between the first blade 32 and the second blade 33.

[0027] The warning unit 36 ​​may be located on the outer surface of the cutting body 31 and, when it is determined that the cable to be cut is live, it can emit light or sound to warn the operator that it is live. Although such a warning unit 36 ​​is shown as being located on the outer surface of the cutting body 31, it is not limited to this and may be installed in other configurations of the cutting body 30 that allow the operator to intuitively confirm the warning, or on at least one of the first body 10 and the second body 20. In this invention, an embodiment is shown in which multiple warning units 36 are installed on a single cutting machine 100, but a single warning unit 36 ​​may also be installed.

[0028] Figure 2 is a schematic diagram showing the internal components of a cutting machine according to one embodiment of the technical concept of the present invention.

[0029] Referring to Figure 1, Figure 2 schematically illustrates the process of transmitting a live-line detection signal and supplying power to each component within the cutting machine 100. The cutting machine 100 may include a power supply unit 60 located within the second body 20, a live-line detection unit 40 located within the first body 10, a control unit 50, and a motor 120.

[0030] In one embodiment, the cutting machine 100 may include a live-line sensing signal transmission unit 42 that transmits a signal of the electrostatic charge voltage when the electrostatic charge voltage is sensed from the cutting unit 30. The electrostatic charge voltage signal in the present invention can correspond to a live-line sensing signal and can be amplified by an amplification unit 110, as shown in Figure 7. More specific details regarding this will be explained in Figure 7.

[0031] The live-line sensing signal transmission unit 42 can not only transmit the electrostatic voltage signal but also act as a passage for transmitting power. The transmission process of the first signal S1, which is an electrostatic voltage signal, will be described below.

[0032] The first blade 32 and the second blade 33 included in the cutting section 30 can sense the voltage of the static charge generated in the cable. In one embodiment, the sensing of the static charge voltage by the first blade 32 and the second blade 33 can be performed by an induction method. That is, static charge can be generated even when the cable and the first blade 32 and the second blade 33 are not in physical contact with each other, and the voltage of the generated static charge can be transmitted to the first blade 32 and the second blade 33.

[0033] The electrostatic charge voltage signal is not transmitted to the live-line sensing signal transmission unit 42 only when it occurs on both sides of the first blade 32 and the second blade 33; the signal can also be transmitted when the electrostatic charge voltage is detected on at least one of the blades of the first blade 32 and the second blade 33. Therefore, even when at least one of the blades of the first blade 32 and the second blade 33 is inactive, that is, when it is not functioning as a receiver, it is possible to sense whether the cable is live or not. More specifically, the first blade 32 and the second blade 33 may be configured to independently receive the electrostatic charge voltage regardless of whether different blades are active or not.

[0034] The first signal S1 detected at the cut section 30 can be transmitted to the live line detection section 40 and the control section 50 via the live line detection signal transmission section 42. The live line detection signal transmission section 42 is electrically connected to the grounding section 14, thereby allowing the cut section 30 to form an electrically closed loop with the ground.

[0035] The live line sensing unit 40 can receive an electrostatic charge voltage signal transmitted from the live line sensing signal transmission unit 42. If the control unit 50 analyzes the signal and determines that the cable is live, it may be configured to shut off the power supplied to the cutting unit 30. More specifically, the control unit 50 can transmit a second signal S2, which is a power shutoff signal, to the motor 120. Upon receiving the second signal S2, the motor 120 stops operating. As a result, the motor 120 stops, and the operation of the cutting unit 30 is also interrupted.

[0036] In one embodiment, the path through which the control unit 50 receives the first signal S1 and the path through which it transmits the second signal S2 may be configured to be different. By transmitting and receiving signals via these different paths, interference between the first signal S1 and the second signal S2 can be prevented.

[0037] The power supply unit 60 included in the second main body 20 can independently supply power to the control unit 50 and the cutting unit 30. In one embodiment, the control unit 50 and the live wire sensing unit 40 can be supplied with a first power supply PWR1, and the motor 120 that drives the cutting unit 30 can be supplied with a second power supply PWR2. Furthermore, the motor 120 supplied with the second power supply PWR2 can supply a third power supply PWR3 to the cutting unit 30, in which case the voltages of the second power supply PWR2 and the third power supply PWR3 are approximately the same or similar.

[0038] In one embodiment, the first power supply PWR1 and the second power supply PWR2 may have different voltages, and the first power supply PWR1 and the third power supply PWR3 may also have different voltages. In this case, the voltage of the first power supply PWR1 input to the control unit 50 may be lower than the voltage input to the motor 120 and the cutting unit 30.

[0039] The cutting unit 30, which is operated by the control unit 50 and the motor 120, may be supplied with power independently from the power supply unit 60. That is, by supplying power to the control unit 50 and the cutting unit 30 independently of each other, one power supply does not affect the other. With this configuration, noise generated during the operation of the cutting unit 30 can be prevented from affecting the control unit 50.

[0040] In one embodiment, even if the power supply to the motor 120 and the cutting unit 30 is interrupted, the power supply to the control unit 50 and the live-line sensing unit 40 can be maintained. Furthermore, if a live wire is detected while the control unit 50 is continuously supplied with the first power supply PWR1, a second signal S2 can be transmitted to the motor 120 to stop the motor's operation.

[0041] Furthermore, the control unit 50 can cut off the second power supply PWR2 supplied to the motor 120 by transmitting a power supply cutoff signal to the power supply unit 60. At the same time, the third power supply PWR3 supplied to the cutting unit 30 is also cut off, thereby stopping the operation of the cutting unit 30.

[0042] Thus, the first power supply PWR1 can be continuously supplied to the control unit 50 regardless of whether the power supplied to the motor 120 and the cutting unit 30 is interrupted or not.

[0043] Figure 3 is an illustrative diagram illustrating the operating state of a cutting machine according to one embodiment of the technical concept of the present invention. Figure 4 is an illustrative diagram illustrating the function of a cutting machine according to one embodiment of the technical concept of the present invention.

[0044] Figure 3 will be explained with reference to Figures 1 and 2, and redundant explanations will be omitted.

[0045] Referring to Figure 3, the process by which the cutting section 30 cuts the cable is shown. When the cable is live, a static charge SE is generated on at least one of the first blade 32 and the second blade 33, which can cause an electrostatic induction phenomenon. Therefore, the static charge SE may be induced simultaneously on both the first blade 32 and the second blade 33. The method by which the first blade 32 and the second blade 33 in the cable induce static charge can be carried out by an electrostatic induction method. The electrostatic induction method in this invention can be a method that utilizes the phenomenon of objects becoming electrically charged externally even without direct contact.

[0046] The electrostatic induction method can be performed first on the blade that is closer to the cable than the first blade 32 and the second blade 33. The distance between the cable and the first blade 32 and the second blade 33 can be defined as the first distance D1, and the distance between the first blade 32 and the second blade 33 can be defined as the second distance D2. The electrostatic induction method can only occur when the first distance D1 is shorter than the second distance D2. That is, in an environment with multiple cables, the electrostatic induction method can be applied only to the cable that is to be cut using the cutting section 30, and not to other cables that are not to be cut. Therefore, static charge SE can only be detected on the cable that is actually cut.

[0047] In one embodiment, the magnitude of the electrostatic charge SE generated when a cable is located between the first blade 32 and the second blade 33, and the first distance D1 is less than the second distance D2, can be set to a preset threshold. The control unit 50 can then determine that the cable is live if the magnitude of the electrostatic charge SE voltage is greater than or equal to the preset threshold. However, even if cutting is in progress, there is a possibility that electrostatic charge SE generated on other cables that are not being cut may be detected by at least one of the first blade 32 and the second blade 33. However, considering the distance between the cables that are not being cut and the cutting machine 100, the magnitude of the electrostatic charge SE generated on the cables that are not being cut may be less than the preset threshold, thereby allowing for the distinction between cables that are actually being cut and those that are not.

[0048] Referring to Figure 4 for more details, we see a first cable a which is actually cut, and a second cable b which is another cable that is not cut. There may be multiple second cables b. The first cable a is considered to be a single cable unless the cutting section 30 cuts multiple cables. The distance between the first blade 32 and the second blade 33 and the second cable b corresponds to the third distance D3. The third distance D3 may be greater than the first distance D1 and the second distance D2. Therefore, since the third distance D3 is greater than the first distance D1, the electrostatic charge SE on the second cable b located at the third distance D3 is not detected by the electrostatic induction method.

[0049] As a result, even when the first cable a is inactive and the second cable b is active, the voltage of the electrostatic charge SE from the second cable b is not detected by the first blade 32 and the second blade 33. Therefore, the first blade 32 and the second blade 33 can accurately detect whether or not the first cable a is inactive.

[0050] Furthermore, if at least one of the first blade 32 and the second blade 33 receives the voltage of the electrostatic charge SE generated in the cable, the first signal S1 is transmitted via the live-line sensing signal transmission unit 42, and the drive of the cutting unit 30 is ultimately stopped. Therefore, the first blade 32 and the second blade 33 can independently receive the voltage of the electrostatic charge SE.

[0051] In other words, even if the first blade 32 is not operating, the second blade 33 can receive the voltage of the electrostatic charge SE, and conversely, even if the second blade 33 is not operating, the first blade 32 can receive the voltage of the electrostatic charge SE. As a result, the first blade 32 and the second blade 33 are configured to receive the voltage of the electrostatic charge SE regardless of whether the other blades are operating or not. Therefore, even in a faulty state where the first blade 32 does not function as a receiver, if the second blade 33 is operating normally, it is possible to clearly determine whether the cable is live or not.

[0052] Conversely, even if the second blade 33 is in a faulty state where it cannot function as a receiver, if the first blade 32 operates normally, the reliability of detecting whether or not the cable is live can be improved.

[0053] Furthermore, in conventional methods, a separate antenna was required to detect an externally exposed magnetic field in order to sense the presence or absence of a live wire. However, in the present invention, the first blade 32 and the second blade 33 can each function as an antenna without any additional components, thus further improving the lifespan of the cutting machine.

[0054] In the following sections, we will focus on examining the rotational motion required for cutting the cutting section.

[0055] As shown in Figure 4, the cutting machine 100 can determine that the first cable a is inactive if no electrostatic charge voltage is detected by at least one of the first blade 32 and the second blade 33.

[0056] In other words, when the first cable a, which is the cable that the worker intends to cut, is positioned between the first blade 32 and the second blade 33, each of the pair of blades positioned on both cutting surfaces of the first blade 32 is spaced equally apart from the first cable a, thereby allowing the voltage of the static charge generated from the first cable a to be detected. Therefore, the magnitude of the static charge voltage detected from the pair of blades must be substantially the same.

[0057] However, if the distance between the first cable a and each blade is different between the pair of blades, the magnitude of the electrostatic charge voltage detected on each blade of the pair may be different from each other. Nevertheless, in this invention, whether or not a cable is live is determined solely by the presence or absence of electrostatic charge detection, and the magnitude of the electrostatic charge voltage is not an important factor in detecting whether or not a cable is live.

[0058] If it is determined that the cable is not live, the cutting machine 100 can supply power to the cutting section and rotate the second blade 33 to cut the first cable a.

[0059] At this time, the cutting machine 100 can rotate the rotating part 12 to position the first blade 32 and the second blade 33 so that they are perpendicular to the first cable a.

[0060] In other words, in work environments where new electrical equipment is being installed or existing electrical equipment is being repaired or removed, the environment may not be suitable for workers to cut cables in the correct posture. As a result, while workers may be able to easily position the cable between the first blade 32 and the second blade 33, it may be difficult to position the first blade 32 and the second blade 33 precisely perpendicular to the cable.

[0061] This allows the cutting machine 100 to control the rotating part 12 and correct the positions of the first blade 32 and the second blade 33 so that the cable is cut with the first blade 32 and the second blade 33 perpendicular to the cable.

[0062] Figure 5 is a conceptual diagram showing the detailed process of supplying power to a cutting machine according to one embodiment of the technical concept of the present invention.

[0063] Referring to Figure 5, a conceptual diagram of the detailed configuration of the power supply unit 60 and other configurations not connected to the power supply unit 60 is shown. When supplying power to the control unit, the power supply unit 60 may include a power isolation and pressure reduction module 61 configured to prevent the generation of noise. In Figure 5, the control unit may consist of a configuration including a micro control unit (MCU) 51.

[0064] The switch unit 61_1, the battery unit 61_2, and the power isolation unit 61_3 can constitute a power isolation and pressure reduction module 61. The switch unit 61_1 can determine whether or not a power input is present. The switch unit 61_1 can correspond to the button unit 13 shown in Figures 1 and 2. When the switch unit 61_1 is activated, the battery unit 61_2, which has a first voltage, can receive a signal from the switch unit 61_1 to supply voltage.

[0065] The switch unit 61_1 is connected to the battery unit 61_2, and the power isolation unit 61_3 and the motor 120 may each be connected in parallel to the battery unit 61_2. Furthermore, the power isolation unit 61_3 and the motor 120, connected in parallel to the battery unit 61_2, may be supplied with power independently from the battery unit 61_2. The live-line sensing IC 41 and the microcontrol unit 51 may each be connected in parallel to the power isolation unit 61_3, and the disconnection unit 30 may be directly connected to the motor 120.

[0066] The voltage of the battery unit 61_2 itself corresponds to the first voltage V1, but the battery unit 61_2 may temporarily reduce the voltage before transmitting it to other components, or it may transmit the first voltage V1 directly to other components. In one embodiment, the battery unit 61_2 can supply the first voltage V1 to the motor 120 when the switch unit 61_1 is activated. In yet another embodiment, the battery unit 61_2 can supply the second voltage V2 to the power supply isolation unit 61_3 when the switch unit 61_1 is activated. In this case, the second voltage V2 may be a lower voltage than the first voltage V1. In one embodiment, the first voltage V1 may be about 18V and the second voltage V2 may be about 12V.

[0067] The power isolation unit 61_3, which receives a second voltage V2 from the battery unit 61_2, can transmit a third voltage V3 to the live-line sensing IC 41 and the microcontroller unit 51, respectively. The live-line sensing IC 41 in Figure 5 is a component included in the live-line sensing unit 40 in Figure 2 and can correspond to a PCB board. The live-line sensing unit 40 may further include components other than the live-line sensing IC 41. The third voltage V3 may be a lower voltage than the second voltage V2. In one embodiment, the third voltage V3 may be approximately 5V.

[0068] Furthermore, the power supply isolation unit 61_3 is a system that separates and supplies the second voltage V2, which is the power supply provided to the live-line sensing IC 41 and the microcontrol unit 51, by converting it to a third voltage V3. This prevents noise generated by the live-line sensing IC 41 from affecting the microcontrol unit 51. Therefore, the control unit 50, including the microcontrol unit 51, can perform a more reliable live-line sensing function without being affected by noise thanks to the power supply isolation unit 61_3, and can smoothly perform the control operation to stop the operation of the cutting unit. The control unit 50 may further include components other than the microcontrol unit 51.

[0069] In other words, the power isolation and pressure reduction module 61 supplies a reduced voltage to the live line sensing unit 40 and the control unit 50, respectively, in response to the input voltage, and performs the function of supplying voltage separately to the live line sensing unit 40 and the control unit 50. Conventionally, when using the power supply of the cutting machine itself, problems sometimes occurred in the process of sensing whether a cable is live or not due to overvoltage being supplied to the controller or noise generation. However, as in the present invention, by supplying a third voltage V3, which is smaller than the first voltage V1, independently to the microcontroller unit 51 via the power isolation and pressure reduction module 61, the control unit including the microcontroller unit 51 can be protected from overvoltage, and noise flowing in from the cutting machine's battery can be effectively attenuated.

[0070] The first voltage V1 input from the battery unit 61_2 to the motor 120 is transmitted to the disconnection unit 30 to drive the disconnection unit. The power supply unit 60 may include a switch contact unit 64 and a live-line sensing relay unit 65. The switch contact unit 64 and the live-line sensing relay unit 65 may be directly connected to the switch unit 61_1. The live-line sensing relay unit 65, the switch contact unit 64, and the connecting wires to the switch unit 61_1 can serve to transmit signals. The live-line sensing relay unit 65 may ultimately be configured to transmit a signal to the switch unit 61_1 to perform operations after live-line detection.

[0071] The power supply unit 60 may include a power maintenance signal unit 62, a cutting machine power down detection unit 63, and a main board 66. The main board 66 may be configured to perform not only control functions but also functions to analyze signal values ​​related to the voltage of static charge.

[0072] The power maintenance signal unit 62 and the cutting machine power down detection unit 63 can be electrically connected to the microcontrol unit 51. The microcontrol unit 51 can be powered up by the battery unit 61_2. After the microcontrol unit 51 has booted up, a power maintenance signal can be applied to the power maintenance signal unit 62. The power maintenance signal unit 62 can maintain the on state without turning off the power to other components, even if a live wire is detected and the power to the cutting machine is turned off. That is, when a live wire is detected, the microcontrol unit 51 can transmit an off signal and an on signal simultaneously. At this time, the on signal can be transmitted to the power maintenance signal unit 62, and the off signal can be transmitted to the motor 120.

[0073] If the cutting machine is not used for an extended period, the power to the entire cutting machine is turned off, and this power-off state can be detected by the cutting machine power-down detection unit 63. The cutting machine power-down detection unit 63 can sense the power supply to the main board 66, and if the power to the main board 66 is turned off, all components that perform the live-line detection function, including the live-line detection IC 41 and the live-line detection operation relay unit 65, may be configured to turn off.

[0074] Figure 6 is a conceptual diagram showing the live signal transmission process of a cutting machine according to one embodiment of the technical concept of the present invention.

[0075] Referring to Figure 6 in conjunction with Figure 5, the cutting section 30 includes multiple blades, as described above. Each blade acts as an electroscope to detect static charge and also functions as an antenna. In other words, the blades included in the cutting section 30 have not only a simple cutting function but also a function to detect the presence or absence of live wires, thereby allowing for the understanding of the electrical state of the cable.

[0076] If a static charge voltage is detected at the cut section 30, the signal related to this static charge voltage can be transmitted to the live-line detection IC 41. Although not shown in Figure 6, the static charge voltage signal detected at the cut section 30 can be amplified by the amplification unit (110 in Figure 7) before being transmitted to the live-line detection IC 41. In other words, since the signal directly detected at the cut section 30 may have a low voltage, the signal can be amplified via the amplification unit 110 to detect it more clearly and improve reliability. As a result, the amplified signal reaches the live-line detection IC 41, which can then more precisely determine whether the cable is live or not.

[0077] The amplification unit 110 is positioned between the cutting unit 30 and the live-line sensing IC 41, and plays a role in strengthening the signal intensity and minimizing potential losses during the signal transmission process. By utilizing the amplification unit 110 in this way, a more stable live-line sensing function can be achieved, thereby improving the reliability of the cutting machine.

[0078] The live-line detection IC 41 can generate a first signal S1, which indicates that the cable is live, and transmit it to the live-line detection signal transmission unit 42. The first signal S1 shown in Figure 6 is interpreted as the same signal as the first signal S1 shown in Figures 2 and 3, and serves as an important criterion for determining whether or not a wire is live.

[0079] The live-line detection signal transmission unit 42 can transmit the first signal S1 received from the live-line detection IC 41 to the control unit 50. The control unit 50 analyzes the received first signal S1 and determines whether or not to continue the cutting operation. If the control unit 50 confirms that the cable is live based on the first signal S1, it can send a second signal S2 to the motor 120 to interrupt the operation of the cutting unit 30.

[0080] The second signal S2 is different from the first signal S1 and serves to transmit a command to stop the operation of the cutting machine. The second signal S2 shown in Figure 6 can be considered to serve the same purpose as the second signal S2 shown in Figure 2, and performs an important function of enabling the cutting machine to immediately stop operation when a live wire condition is detected.

[0081] Although not shown in the drawing, the first signal S1 transmitted from the live-line detection signal transmission unit 42 can also be received by the power supply unit 60. After receiving the first signal S1, the power supply unit 60 can transmit the signal again to the control unit 50 in order to shut off the power supplied to the motor 120. In other words, the power supply unit 60 not only serves to supply power, but can also shut off the power based on the live-line detection signal to ensure the safety of the cutting machine.

[0082] Through this process, when the disconnection section 30 senses an electrostatic charge voltage, it is amplified via the amplification section 110, and then the live-line detection IC 41 finally analyzes the signal to determine whether or not there is a live wire. Subsequently, the first signal S1 generated by the live-line detection IC 41 is transmitted to the control unit 50 via the live-line detection signal transmission section 42, and the control unit 50 sends out a second signal S2 to stop the operation of the motor 120 if necessary.

[0083] Furthermore, the first signal S1 transmitted from the live-line sensing signal transmission unit 42 can also be transmitted to the power supply unit 60, thereby enabling the power supply unit 60 to take measures to shut off the power to the motor 120. In this process, the power supply unit 60 not only shuts off the power to the motor 120, but can also transmit a signal to the control unit 50 as needed to stop the overall operation of the cutting machine.

[0084] As a result, the cutting machine of the present invention has a series of protective functions that sense whether or not a cable is live and, based on that, ensure that the cutting operation is performed safely. In particular, by having the blade itself capable of sensing static charge, accurate live-line detection is possible without the need for a separate external voltage detection device, thereby improving the lifespan of the cutting machine and ensuring the safety of the operator.

[0085] Therefore, the cutting machine of the present invention has a structure that can quickly sense the electrical state of a cable and prevent accidents by sending an immediate disconnection signal as needed, and can be effectively used in various electrical work environments.

[0086] This is a conceptual diagram illustrating the process by which a live signal is transmitted to a cutting machine according to one embodiment of the technical concept of the present invention, thereby stopping the operation of the cutting section.

[0087] Referring to Figure 7, a cutting machine 100 according to one embodiment of the present invention may consist of a first blade 32, a second blade 33, an amplification unit 110, a warning unit 36, a control unit 50, a motor 120, a live wire sensing unit 40, and a power supply unit 60. Some components of such a cutting machine 100 are merely functionally distinct elements, and in an actual physical environment, two or more components may be integrated with each other, or a single component may be implemented separately. That is, rather than a specific component existing alone, multiple functions may be integrated and arranged within a single module or hardware, or they may be implemented in separate forms as needed.

[0088] To describe each component, the first blade 32 and the second blade 33 can detect the voltage of static electricity via an electrostatic induction method. The electrostatic induction method utilizes the principle that static electricity is induced and a voltage is generated in a specific object without direct physical contact, and by utilizing this, it is possible to sense whether a cable is live or not before the cutting machine blades come into contact with the cable.

[0089] Next, the amplification unit 110 can receive and amplify a first signal S1, which is a signal indicating the voltage of the static charge detected by at least one of the first blade 32 and the second blade 33.

[0090] Specifically, the amplification unit 110 can amplify the first signal S1, which is a signal relating to the electrostatic charge voltage formed from the cable, using an analog amplifier (OP-AMP, Operation Amplifier). That is, the amplification unit 110 can amplify the electrostatic charge voltage formed from the cable to a certain preset value and transmit the amplified signal to the power supply unit 60 via the live line sensing unit 40. The live line sensing unit 40, upon receiving the amplified first signal S1, can transmit it again to the power supply unit 60. Although this process is not directly shown in Figure 7, the process of transmitting the first signal S1 can be carried out via the live line sensing signal transmission unit 42 described in Figure 6.

[0091] After receiving the first signal S1, the power supply unit 60 can transmit it to the control unit 50. Based on the electrostatic voltage signal amplified by the amplification unit 110, the control unit 50 can determine whether the cable is live or not. If it is determined that the cable is live, the control unit 50 can shut off the power supplied to the cutting unit, including the first blade 32 and the second blade 33.

[0092] Specifically, the control unit 50 can determine that the cable is live if it detects an electrostatic charge voltage from either the first blade 32 or the second blade 33. For example, when an operator places a cable between the first blade 32 and the second blade 33 to perform a cutting operation, electrostatic charge is generated from the cable, and the electrostatic charge voltage generated at that time may be transmitted to the control unit 50 via the live-line detection signal transmission unit. The control unit 50 can initially determine that the cable is live the moment it detects this signal. On the other hand, if no electrostatic charge voltage is detected by the first blade 32 or the second blade 33, the control unit 50 can determine that the cable is inactive.

[0093] In one embodiment, the control unit 50, upon receiving the first signal S1, can ultimately transmit a second signal S2 to the motor 120 to stop the operation of the cutting section, including the first blade 32 and the second blade 33.

[0094] Upon receiving the second signal S2, the motor 120 can stop operating. Furthermore, upon receiving the first signal S1, the power supply unit 60 can cut off the power supplied to the motor 120. However, since Figure 7 only shows the signal transmission process, the process by which the power supply unit 60 cuts off the power supplied to the motor 120 is omitted.

[0095] Next, when the warning unit 36 ​​detects an electrostatic charge voltage from the cable by at least one of the first blade 32 and the second blade 33, it can output one or more of the following: light, sound, and vibration.

[0096] Specifically, the warning unit 36 ​​may be configured to include one or more of the following: a light-emitting element for outputting light, a speaker for outputting sound, and a vibration motor for outputting vibration. Furthermore, if the control unit 50 determines that the cable is live, the warning unit 36 ​​can output one or more of the following in a specific pattern according to the user's settings: light, sound, or vibration.

[0097] The warning unit 36 ​​may include a light-emitting element that emits light of different wavelengths depending on whether the cable is live or inactive. For example, the light-emitting element may emit red light when the cable is live and green light when it is inactive.

[0098] By allowing users to easily recognize the color and wavelength of the light emitted by the light-emitting element, workers can perform cable cutting operations more quickly and safely. For example, the control unit 50 can output red light if a static charge is detected in at least one of the first blade 32 and the second blade 33. In addition, if the control unit 50 determines that the cable is in a de-energized state, it can output a beep sound along with a voice announcement such as "The cable has been confirmed to be in a de-energized state."

[0099] In this case, the control unit 50 may output a beep sound with varying pitch depending on the magnitude of the detected electrostatic charge voltage. That is, by increasing the frequency of the warning sound as the voltage increases, or by outputting the warning sound in a specific pattern, it is possible to help workers understand the status of the cable more intuitively.

[0100] Such features allow workers to quickly determine whether the cable they intend to cut is live or not, and also to further confirm if other surrounding cables are live, thus helping to prevent safety accidents.

[0101] Therefore, the cutting machine of the present invention is equipped with a function to sense the presence or absence of live wires in real time in order to ensure the safety of the operator, and to immediately stop the operation of the cutting section if necessary, thereby greatly improving the reliability and safety of the work.

[0102] Figure 8 is a conceptual diagram showing the detailed process of supplying power to a cutting machine according to one embodiment of the technical concept of the present invention.

[0103] Referring to Figure 8, the power supply unit 60 can supply power to each component of the live-line-sensing cutting machine 100 in accordance with the control of the control unit 50. At this time, if the control unit 50 determines that the cable to be cut is live, the power supply unit 60 can cut off the power supplied to the cutting section, including the first blade 32 and the second blade 33. In other words, if the cable to be cut is detected to be live, the cutting machine is configured to immediately stop operation to protect the user's safety.

[0104] The power supply unit 60 can supply a first power supply PWR1 to the live-line sensing unit 40 and the control unit 50, respectively. The power supply unit 60 can also supply a second power supply PWR2 to the motor 120, and these two power supplies PWR1 and PWR2 can be supplied independently. That is, by supplying the first power supply PWR1 independently to the live-line sensing unit 40 and the control unit 50, and the second power supply PWR2 independently to the motor 120, the design can be made so that noise generated in a specific component does not affect other components.

[0105] For example, if the first power supply PWR1 is supplied to the control unit 50, but the control unit 50 detects a live line signal, the second power supply PWR2 is not supplied to the motor 120. By supplying power independently in this way, noise generated by the operation of the motor 120 does not affect the first power supply PWR1 supplied to the live line detection unit 40 and the control unit 50. As a result, the system can be designed to perform live line detection smoothly without electrical interference corresponding to the motor's operation.

[0106] Furthermore, the live-line sensing unit 40, which is supplied with the first power supply PWR1, can transmit a portion of the first power supply PWR1 to the amplification unit 110. That is, the amplification unit 110 plays the role of amplifying the electrostatic charge sensing signal, and for that purpose, it can be operated by being supplied with a separate power supply.

[0107] Figure 9 is a flowchart showing a control method for a cutting machine according to one embodiment of the technical concept of the present invention.

[0108] The control method for the cutting machine (S1 in Figure 9) may include a step of turning the power of the live wire detection device on or off, which may correspond to step S110. The live wire detection device referred to in Figure 9 may correspond to the live wire detection unit 40 shown in Figure 2.

[0109] If the power to the live wire detection device is turned off in step S110, the operation of the cutting machine can be stopped by step S140b. Here, the cutting machine can be considered to be a device having the same structure as the cutting machine 100 described in Figures 1 to 8.

[0110] The control method for the cutting machine (S1 in Figure 9) may include a step S120 in which, if the power supply of the live wire detection device is ON in step S110, a determination is made as to whether or not live wire detection will be performed after step S110. Step S120, which detects whether or not the cable is live, may be performed by the first blade 32, the second blade 33, the live wire detection unit 40, and the control unit 50 shown in Figure 2. If live wire is detected in step S120, the aforementioned step S140b is executed, thereby automatically stopping the operation of the cutting machine.

[0111] The control method for the cutting machine (S1 in Figure 9) may include a step S130 to control the on / off switching of the cutter performed after step S120 if no live wire is detected in step S120 (NO). Here, the cutter switch can correspond to the switch unit 61_1 shown in Figure 5.

[0112] If the cutter switch is in the OFF state in step S130, the aforementioned step S140b is executed, thereby stopping the operation of the cutting machine. On the other hand, the control method for the cutting machine (S1 in Figure 9) may further include step S140a to start the operation of the cutting machine if the cutter switch is in the ON state in step S130.

[0113] The process from step S110 to step S130 may be executed sequentially, or some steps may be executed simultaneously. However, each step is executed in a predetermined order, and no specific steps are skipped or their order is changed.

[0114] Figure 10 is a flowchart showing a control method for a cutting machine when live wire detection occurs, according to one embodiment of the technical concept of the present invention.

[0115] Referring to Figure 10, if a live wire is detected in the cable, the cutting machine control method (S2 in Figure 10) may be performed. The cutting machine control method when a live wire is detected (S2 in Figure 10) may include a step S210 for detecting whether or not the cable is live. Step S210 for detecting whether or not the cable is live may be performed by the first blade 32, the second blade 33, the live wire detection unit 40, and the control unit 50 in Figure 2.

[0116] The control method for the cutting machine when a live wire is detected (S2 in Figure 10) may include step S220, which transmits a live wire detection signal if a live wire is detected in step S210. This step may be performed by the live wire detection signal transmission unit 42 in Figure 2.

[0117] Step S2 in Figure 10 may include step S230, which involves shutting off the power supply to stop the motor's operation after step S220. Step S230 may be performed by the control unit 50 in Figure 2. In step S230, the control unit 50 can directly instruct the motor 120 to stop, or it can instruct the power supply unit 60 to shut off the power supplied to the motor 120. In either case, the same result of stopping the operation of the motor 120 can be obtained.

[0118] Step S2 may include step S240, which may be performed after step S230, to generate a buzzer and flash an LED, and step S250, which may be performed to stop the motor operation.

[0119] In step S240, the light-emitting element of the warning unit 36 ​​can emit red light and generate a buzzer sound. In step S250, the motor's operating switch is turned off, which completely stops the cutting unit.

[0120] As a result, the cutting machine of the present invention can automatically detect when a cable is live and immediately stop the cutting operation, and can also alert the operator to the danger through a buzzer sound and an LED signal. This effectively ensures the safety of the operator and prevents accidents caused by electrical hazards.

[0121] Figure 11 is a flowchart showing the steps involved in supplying power to a cutting machine according to one embodiment of the technical concept of the present invention.

[0122] Referring to Figure 11, the process of supplying power to the cutting machine is shown as step S3, and this step S3 directly corresponds to the flowchart of power flow within the power isolation and pressure reduction module 61 described in Figure 5. In other words, the same concept as the power supply process described in Figure 5 is applied, and the flowchart in Figure 11 is a procedural summary of that process.

[0123] Step S3 includes a series of steps necessary to supply power to the cutting machine, and may specifically include step S310, which switches the power to the switch unit described in Figure 5 to the ON state. The switch unit plays a role in controlling the power to the cutting machine as a whole and is the first step that must be performed when the user intends to operate the cutting machine.

[0124] After step S310 is performed, step S320 may be performed to activate the battery unit having the first voltage as described in Figure 5. That is, in step S320, the battery unit 61_2, which is the power source for the cutting machine, is activated, thereby preparing it to supply power to the main components of the cutting machine.

[0125] Once step S320 is completed, step S330 may be performed to supply a second voltage to the power isolation unit. The power isolation unit plays an important role in supplying independent power to each component of the cutting machine and preventing electrical interference. In particular, it can maintain an independent power supply path between the motor 120 and the control unit 50, and can prevent electrical noise that may be generated by the operation of the motor from affecting the signal sensing of the control unit 50 and the live-line sensing unit 40.

[0126] After step S330 is performed, step S340 can proceed, which supplies a third voltage to the live-sensing IC and the microcontroller (MCU), respectively. In other words, in step S340, a separate power supply is provided so that the live-sensing unit 40 and the control unit 50 can operate normally, thereby activating the safety function of the cutting machine.

[0127] In this way, after the switch unit is activated in step S310, the battery unit is activated in step S320, voltage is supplied to the power isolation unit via step S330, and finally voltage is supplied to the live-line sensing IC and MCU in step S340, thereby completing the power supply process of the cutting machine sequentially.

[0128] In particular, the process from step S310 to step S340 is performed between components connected in series, as shown in Figure 5, and therefore must proceed sequentially; no specific step can be skipped or its order changed. In other words, for power to be supplied properly, each step must be executed in order, thereby ensuring that all functions of the cutting machine operate correctly.

[0129] As described above, preferred embodiments of the present invention have been disclosed in this specification and drawings, but it will be obvious to those ordinary skill in the art that, in addition to the embodiments disclosed herein, other modifications based on the technical idea of ​​the present invention are also possible. Furthermore, although certain terms have been used in this specification and drawings, they are used in a general sense to facilitate the explanation of the technical content of the present invention and to aid in the understanding of the invention, and do not limit the scope of the present invention. Accordingly, the detailed description above should not be interpreted restrictively in any way, but should be considered illustrative. The scope of the present invention should be selected by a reasonable interpretation of the appended claims, and all modifications within the scope of the equivalents of the present invention are included within the scope of the present invention.

[0130] The embodiments described above are merely illustrative, and various modifications and equivalent embodiments are possible therefrom for those with ordinary skill in the art. Therefore, the true scope of technical protection of the exemplary embodiments must be determined by the technical idea set forth in the following claims. [Explanation of Symbols]

[0131] 100 cutting machine 10. Main body 11 Body part 12 Rotating part 13 Button section 20 Second Main Body 30 Cut section 31 Cutting body 32 1st blade 33 2nd blade 34 Hinge 40 Live wire sensor 42 Live-line detection signal transmission unit 50 Control Unit 60 Power supply section

Claims

1. A cutting section configured to cut a cable, including a first blade and a second blade that receive the voltage of the electrostatic charge generated from the cable, An amplification unit that amplifies the signal relating to the voltage of the static charge sensed at the cut section, A live-line sensing unit determines whether the cable is live or not based on the signal amplified by the amplification unit, A power supply unit that supplies power to the cutting section, A cutting machine comprising: a control unit configured to shut off the power supplied to the cutting unit when the live-line sensing unit determines that the cable is in a live state; and

2. The aforementioned power supply unit, The cutting machine according to claim 1, configured to supply power to the control unit and the cutting unit, respectively.

3. The voltage sensing of the static charge by the first blade and the second blade is performed by an induction method. The control unit, The cutting machine according to claim 1, wherein the power supply to the cutting unit is interrupted when at least one of the first blade and the second blade receives an electrostatic voltage.

4. The aforementioned charge induction method is, Of the first and second blades, the process is performed first with the blade that is closer in distance from the cable. The cutting machine according to claim 3, wherein each of the first blade and the second blade is configured to independently receive an electrostatic voltage regardless of whether different blades are operating.

5. It further includes a first main body connected to the lower part of the cut section, The first main body is, A body section configured to be grasped by the user, A rotating part that allows the cutting part to rotate, A button for operating the cutting unit, The cutting machine according to claim 1, further comprising a grounding portion located near the button portion.

6. The live line sensing signal transmission unit further includes a signal relating to the voltage of the static charge sensed by the first blade and the second blade, which transmits the signal relating to the voltage of the static charge sensed by the live line sensing unit. The cutting machine according to claim 5, wherein the live-line sensing signal transmission unit is electrically connected to the grounding unit.

7. The first blade is fixedly installed, and the second blade is positioned opposite the first blade and rotated by the control unit. The cutting machine according to claim 1, wherein the first blade and the second blade are driven by a motor electrically connected to the power supply unit.

8. The aforementioned power supply unit, Includes a power isolation and pressure reduction module configured to prevent noise generated between the power supply unit and the control unit, The cutting machine according to claim 1, wherein the control unit and the cutting unit are each connected independently to the power supply unit.

9. The aforementioned power supply unit, It further includes a switch unit, a battery unit, and a power supply isolation unit, The magnitude of the first voltage of the battery unit operated by the switch unit is greater than the magnitude of the second voltage transmitted from the battery unit to the power supply isolation unit. The live-line sensing unit includes a live-line sensing IC, and The control unit further includes a microcontrol unit, The cutting machine according to claim 8, wherein the magnitude of the third voltage transmitted from the power isolation unit to the live-line sensing IC and the microcontrol unit, respectively, is smaller than the magnitude of the second voltage.

10. The switch unit is connected to the battery unit, Each of the aforementioned power supply isolation unit and motor is connected in parallel to the battery unit. The live-line sensing IC and the microcontrol unit are each connected in parallel to the power supply isolation unit. The cutting machine according to claim 9, wherein the cutting section is directly connected to the motor.

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