JP5347956B2 - Electric brush cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric bush cutter capable of easily recognizing rotation of the cutting blade. <P>SOLUTION: The electric bush cutter includes an operation rod 20 including an elongated connecting portion 30 and a holding portion 25, a motor supported at one end part of the connecting portion 30, a cutting blade rotatably driven by the motor, an electric power source 10 set on the operation rod and supplying electric power to the motor, a drive switch 16 switching on and off the electric power supply to the motor, and a light emitting portion 18 emitting light by electric power generated by inertia rotation of the motor when the drive switch 16 is switched from on to off. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to an electric brush cutter.

  Patent Document 1 discloses an electric brush cutter in which a motor is disposed at a distal end portion of an operation rod (operation pipe). According to such an electric brush cutter, mechanical loss of power can be suppressed and power consumption of the motor can be suppressed.

Japanese Utility Model Publication No. 7-36612

  Even if the power supply is cut off, the motor and the cutting blade of the electric brush cutter do not stop immediately but rotate due to inertia until a certain time elapses. In particular, in the electric brush cutter in which the motor is disposed at the tip of the operation rod as in the electric brush cutter of Patent Document 1, the mechanical loss of power is small and a large inertial force works due to the weight of the cutting blade. From the time the switch is turned off, it takes a relatively long time until the motor and the cutting blade come to rest.

  Therefore, it is desirable for the operator to confirm whether or not the cutting blade is stationary after turning off the switch, by visually observing or listening to the rotating sound. However, electric brush cutters are used not only on flat land but also on slopes and mountains. The main content of the work is mowing, but there are many places where weeds, branches of trees, etc. are thickened, and in such places the feet and overhead are dim even during the day. Further, when mowing as a group, the work is often started early in the morning, and from autumn to winter, the work is often performed in a dim environment even on flat ground. Therefore, it is difficult to visually recognize the rotation of the cutting blade. In addition, when performing mowing work in a noisy place such as a place with a lot of traffic or around a construction site, it is difficult to hear the rotating sound of the cutting blade.

  In view of the above problems, an object of the present invention is to provide an electric brush cutter that can easily recognize the rotation of a cutting blade.

In order to achieve the above object, an electric brush cutter according to the present invention includes:
An operating rod having a long connecting portion and a gripping portion;
A motor supported by one end of the connecting portion;
A cutting blade driven to rotate by the motor;
A power supply unit disposed on the operating rod and supplying power to the motor;
A drive switch for turning on / off power supply to the motor;
A light emitting unit that emits light by electric power generated by rotation of the motor due to inertia when the drive switch is switched from on to off;
It is characterized by that.

For example, the drive switch is
A first circuit state in which the motor and the power supply unit are connected;
A second circuit state in which the motor and the power supply unit are cut off and the motor and the light emitting unit are connected; and
It may be configured as follows.

  For example, the light emitting unit may emit light by electric power supplied from the power supply unit when the drive switch is on.

For example, the above-mentioned electric brush cutter is
You may further provide the light emission control switch which controls light emission of the said light emission part.

For example, the light emission restriction switch is
A third circuit state in which power is supplied to the light emitting unit;
Switching between a fourth circuit state in which power is not supplied to the light emitting unit,
It may be configured as follows.

The motor is composed of a coreless motor,
It is desirable.

The motor includes a rotor, a stator, and an output shaft provided coaxially with the rotor,
Either one of the rotor and the stator is a disk-shaped coil disk having a plurality of substantially annular coils arranged in a circumferential direction around the output shaft when viewed in the axial direction of the output shaft. Prepared,
Either one of the rotor and the stator includes magnetic flux generation means for generating magnetic flux that passes through the coil disk in the axial direction of the output shaft.
It is desirable.

  ADVANTAGE OF THE INVENTION According to this invention, the electric brush cutter which can recognize the rotation of a cutting blade easily can be provided.

The side view which shows the electric brush cutter which concerns on embodiment of this invention. Sectional drawing which shows the power supply part and operation part of the electric brush cutter shown by FIG. Sectional drawing which shows the drive part of the electric brush cutter shown by FIG. The circuit diagram which shows the drive circuit of the electric brush cutter which concerns on 1st Embodiment of this invention. The circuit diagram which shows the drive circuit of the electric brush cutter which concerns on 2nd Embodiment of this invention. The circuit diagram which shows the drive circuit of the electric brush cutter which concerns on 3rd Embodiment of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(First embodiment)
As shown in FIG. 1, the electric brush cutter 1 includes a power supply unit 10, an operation rod 20, and a drive unit 40.

  As shown in FIG. 2, the power supply unit 10 mainly includes a power supply housing 11, a battery 12, a drive switch 16, and an LED circuit 17.

  The power supply housing 11 holds the battery 12 in a detachable manner, and houses a drive switch 16 and an LED circuit 17. An operation panel 15 is provided on the upper surface of the power supply housing 11. The operation panel 15 is provided with an LED (light emitting diode) 18 connected to the LED circuit 17. Although not shown, the operation panel 15 is provided with various switches and buttons for turning on / off the main power source of the electric brush cutter 1 and changing the function of the electric brush cutter 1. Has been.

  The battery 12 is composed of a secondary battery such as a lithium ion battery, for example, and supplies electric power to a motor 50 provided in the drive unit 40.

  As will be described later with reference to FIG. 4, the drive switch 16 is a changeover switch including an ON terminal, an OFF terminal, and an output terminal that is selectively connected to one of the ON terminal and the OFF terminal. . When the drive switch 16 is turned on, the battery 12 and the motor 50 are connected. When the drive switch 16 is turned off, the battery 12 and the motor 50 are disconnected, and the motor 50 and the LED circuit 17 are connected. The

  The LED circuit 17 is composed of a regulator or the like, and turns on the LED 18 when the motor 50 is supplied with electric power generated during braking, as will be described later with reference to FIG.

  As shown in FIG. 1, the operating rod 20 includes a long connecting portion 30 and a grip portion 25.

  As shown in FIG. 2, the connecting part 30 is a hollow tube made of aluminum alloy, reinforced plastic, or the like, and is fitted and fixed to the power supply housing 11 of the power supply part 10. A power supply line 39 for connecting the battery 12 of the power supply unit 10 and the motor 50 of the drive unit 40 is inserted into the connecting unit 30.

  The holding part 25 is fixed to the connecting part 30 adjacent to the power supply housing 11 of the power supply part 10. The grip 25 is provided with a trigger 26. The trigger 26 is mechanically connected to the drive switch 16 of the power supply unit 10 via a wire 27. By operating the trigger 26, the drive switch 16 is turned ON / OFF, and the motor 50 of the drive unit 40 is driven / stopped.

  As shown in FIG. 1, the connecting portion 30 is provided with an auxiliary handle 32. Further, the connecting portion 30 is provided with a protective cover 34 that covers a part of the cutting blade 42 provided in the driving portion 40.

  The drive part 40 is comprised from the motor 50 and the cutting blade 42, as shown in FIG.

  The motor 50 is a commutator motor including a motor housing 51, an output shaft 52, a rotor 53, a stator 54, and a pair of sliders 55.

  The motor housing 51 is fitted and fixed to the other end portion of the connecting portion 30 and accommodates a rotor 53, a stator 54, and a pair of sliders 55.

  The output shaft 52 is supported by bearings 57 and 58 provided in the motor housing 51 so as to be rotatable around the axis 7. One end of the output shaft 52 protrudes from the motor housing 51 and is directly fixed to the cutting blade 42 without a gear or the like.

  The rotor 53 includes a flange 61, a coil disk 62, and a commutator 63, and is provided coaxially with the output shaft 52.

  The flange 61 is fixed to the output shaft 52 and supports the coil disk 62 and the commutator 63.

  The coil disk 62 is composed of a disc-shaped printed wiring board. The coil disk 62 is formed with a plurality of unillustrated coils arranged in the circumferential direction about the axis 7 by a conductor pattern. The plurality of coils are composed of a plurality of coil pieces radially formed around the axis 7 and are each formed in a substantially annular shape (substantially U-shape). For example, the coil disk 62 may be formed with a conductor pattern on both sides, may be formed by laminating a plurality of printed wiring boards, or may be formed of a multilayer printed wiring board.

  The commutator 63 is composed of a plurality of commutator pieces (not shown) arranged in the circumferential direction around the axis 7. Each commutator piece is electrically connected to a corresponding coil of the coil disk 62.

  The stator 54 includes a magnet 71 and yokes 72 and 73. The yokes 72 and 73 are formed in an annular plate shape from a magnetic material such as iron, and are fixed to the housing 51a so as to face the lower surface and the upper surface of the coil disk 62, respectively. The magnet 71 has an annular plate shape having a plurality of magnetic poles arranged in the circumferential direction, and is fixed to the upper surface of the yoke 72 so as to face the lower surface of the coil disk 62. The yokes 72 and 73 form a magnetic path so that the magnetic flux generated by the magnet 71 passes through the coil disk 62 in the direction of the axis 7.

  The pair of sliders 55 are held by a pair of slider holders 59 fixed to the motor housing 51, and are arranged with the axis 7 therebetween so as to be in sliding contact with the upper surface of the commutator 63. The slider 55 is biased toward the upper surface of the commutator 63 by a biasing means (not shown) provided in the slider holder 59. The slider 55 is made of carbon having electrical conductivity, and is connected to the power supply line 39 inserted through the connecting portion 30.

  Next, the operation of the motor 50 will be described.

  When the drive switch 16 of the power supply unit 10 is turned on in conjunction with the operation of the trigger 26 of the gripping unit 25, a voltage is applied from the battery 12 of the power supply unit 10 to the pair of sliders 55 of the motor 50.

  The voltage applied to the pair of sliders 55 is applied to the coil of the coil disk 62 that passes the magnetic flux generated by the stator 54 via the commutator 63. Since a current flows in the coil disk 62 in a direction perpendicular to the magnetic flux generated by the stator 54 and in a direction perpendicular to the axis 7, a rotational force about the axis 7 is generated in the rotor 53. Therefore, the rotor 53, the output shaft 52 fixed to the rotor 53, and the cutting blade 42 connected to the output shaft 52 rotate integrally with the axis 7 as the rotation axis.

  The motor 50 having the above configuration belongs to a so-called coreless motor, and has a flat and small shape in which the width in the direction of the axis 7 is suppressed as compared with a motor having a coil wound around a core (iron core). . Further, since the rotor 53 is flat and has a large shape in the radial direction, there is an advantage that the torque of the motor 50 is improved while being lightweight, and the motor 50 and the cutting blade 42 are directly connected to each other for electric cutting. The payer 1 can be configured. In addition, since the coil disk 62 constituting the rotor 53 does not require a so-called coil end (a bent portion protruding from the core in the coil wound around the core), the motor 50 is configured to be flatter and more compact, Heat generation of the coil is suppressed. Further, since the rotor 53 constituted by the coil disk 62 has a large surface area, that is, a heat radiating area, the motor 50 is excellent in coil cooling ability.

  Next, the drive circuit 100 including the battery 12, the drive switch 16, the motor 50, the LED circuit 17, and the LED 18 will be described with reference to FIG.

  The positive terminal of the battery 12 is connected to the ON terminal of the drive switch 16. The output terminal of the drive switch 16 is connected to one terminal of the motor 50. The other terminal of the motor 50 is connected to the negative terminal of the battery 12. The OFF terminal of the drive switch 16 is connected to the minus terminal of the LED circuit 17. The plus terminal of the LED circuit 17 is connected to the other terminal of the motor 50.

  Next, with reference to FIG.1 and FIG.4, operation | movement of the electric brush cutter 1 provided with the above-mentioned drive circuit 100 is demonstrated.

  When the drive switch 16 is switched from OFF to ON by the operation of the trigger 26, the drive circuit 100 is in a circuit state in which the motor 50 and the battery 12 are connected and the LED circuit 17 and the battery 12 are disconnected. Therefore, the motor 50 receives the supply of electric power from the battery 12 and rotationally drives the cutting blade 42. Further, the LED circuit 17 is not supplied with power and does not cause the LED 18 to emit light.

  When the drive switch 16 is switched from ON to OFF by the operation of the trigger 26, the drive circuit 100 enters a circuit state in which the motor 50 and the battery 12 are disconnected and the motor 50 and the LED circuit 17 are connected. At this time, the motor 50 generates power by rotation of the motor 50 and the cutting blade 42 due to inertia, and supplies power to the LED circuit 17. The LED circuit 17 causes the LED 18 to emit light by the electric power supplied from the motor 50 until the motor 50 and the cutting blade 42 are stationary. Therefore, the user can easily recognize the rotation of the rotary blade 42 based on the light emission state of the LED 18.

  The electric brush cutter 1 having the above configuration has the advantage that the mechanical loss of power is small and the power consumption of the motor 50 is small because the motor 50 is disposed at the tip of the operation rod 30. Further, since the motor 50 and the cutting blade 42 are directly connected, it is possible to further suppress mechanical loss and driving noise.

  Further, according to the drive circuit 100 having the above configuration, the LED 18 that emits light by the electric power generated by the rotation of the motor 50 due to the inertia is provided, so that when the drive switch 16 is switched from ON to OFF, the electric brush cutter 1 It can be easily recognized that the cutting blade 42 is rotating. In particular, even when the motor 50 and the cutting blade 42 are directly connected and it is difficult to recognize the rotation of the cutting blade 42 by the driving sound of the motor 50, the situation of the cutting blade 42 can be accurately grasped. is there.

  Moreover, according to the electric brush cutter 1 having the above-described configuration, the motor 50 that is a coreless motor is employed, so that it is possible to drive efficiently with little rotation loss. Further, even when the braking effect is small and the rotation due to inertia is continued, the state of the cutting blade 42 can be recognized by visual observation of the LED 18, so that workability is improved.

(Second Embodiment)
Next, the electric brush cutter 1 according to the second embodiment will be described. The electric brush cutter 1 of the second embodiment is substantially the same as the electric brush cutter 1 of the first embodiment with respect to the basic configuration, but the electric brush cutter 1 of the first embodiment in the configuration of the drive circuit 200. Different from. Hereinafter, the drive circuit 200 according to the second embodiment will be described with reference to FIG.

  The drive circuit 200 is different from the drive circuit 100 of the first embodiment in that it includes a light emission restriction switch 19. The light emission restriction switch 19 is a changeover switch including an ON terminal, an OFF terminal, and an output terminal that is selectively connected to one of the ON terminal and the OFF terminal. Note that the light emission restriction switch 19 can be switched by the user's hand, for example, with the operation panel 15 provided in the power supply unit 10 (FIG. 1) described above.

  The drive circuit 200 includes a battery 12, a drive switch 16, a motor 50, an LED circuit 17, an LED 18, and a light emission restriction switch 19.

  The positive terminal of the battery 12 is connected to the ON terminal of the drive switch 16. The output terminal of the drive switch 16 is connected to the plus terminal of the LED circuit 17. The minus terminal of the LED circuit 17 is connected to the ON terminal of the light emission restriction switch 19. The output terminal of the light emission restriction switch 19 is connected to one terminal of the motor 50. The other terminal of the motor 50 is connected to the negative terminal of the battery 12. The OFF terminal of the drive switch 16 is connected to the other terminal of the motor 50. The OFF terminal of the light emission restriction switch 19 is connected to the output terminal of the drive switch 16.

  Next, with reference to FIG.1 and FIG.5, operation | movement of the electric brush cutter 1 provided with the above-mentioned drive circuit 200 is demonstrated.

  First, the case where the light emission restriction switch 19 is ON will be described.

  When the drive switch 16 is switched from OFF to ON by the operation of the trigger 26, the drive circuit 200 enters a circuit state in which the motor 50 and the LED circuit 17 are both connected to the battery 12. Therefore, the motor 50 receives the supply of electric power from the battery 12 and rotationally drives the cutting blade 42. Further, the LED circuit 17 receives power supplied from the battery 12 and causes the LED 18 to emit light.

  When the drive switch 16 is switched from ON to OFF by the operation of the trigger 26, the drive circuit 200 is configured such that both the motor 50 and the LED circuit 17 are disconnected from the battery 12, and the motor 50 and the LED circuit 17 are connected. It becomes a circuit state. At this time, the motor 50 generates power by rotation of the motor 50 and the cutting blade 42 due to inertia, and supplies power to the LED circuit 17. The LED circuit 17 causes the LED 18 to emit light by the electric power supplied from the motor 50 until the motor 50 and the cutting blade 42 are stationary.

  Next, a case where the light emission restriction switch 19 is OFF will be described.

  When the drive switch 16 is switched from OFF to ON by the operation of the trigger 26, the drive circuit 200 is a circuit in which the motor 50 and the battery 12 are connected and the motor 50 and the battery 12 are both disconnected from the LED circuit 17. It becomes a state. Therefore, the motor 50 receives the supply of electric power from the battery 12 and rotationally drives the cutting blade 42. Further, the LED circuit 17 is not supplied with power and does not cause the LED 18 to emit light.

  When the drive switch 16 is switched from ON to OFF by the operation of the trigger 26, the drive circuit 200 is a circuit in which the motor 50 and the battery 12 are disconnected and the motor 50 and the battery 12 are both disconnected from the LED circuit 17. It becomes a state. At this time, the motor 50 generates power by the rotation of the motor 50 and the cutting blade 42 due to the inertia, but cannot supply power to the LED circuit 17. Therefore, the LED circuit 17 does not cause the LED 18 to emit light.

  According to the drive circuit 200 having the above-described configuration, when the drive switch 16 is ON, the LED 18 emits light by the power supplied from the battery 12, so that the cutting blade 42 of the electric brush cutter 1 rotates even during work. Can be easily recognized.

  In addition, by providing a light emission restriction switch that restricts the light emission of the LED 18, the light emission of the LED 18 can be restricted according to the user's preference, so that the convenience of the electric brush cutter 1 can be improved.

(Third embodiment)
Next, the electric brush cutter 1 according to the third embodiment will be described. The electric brush cutter 1 of the third embodiment is substantially the same as the electric brush cutter 1 of the first and second embodiments with respect to the basic configuration, but the first and second implementations in the configuration of the drive circuit 300. It differs from the electric brush cutter 1 of the form. Hereinafter, the drive circuit 300 according to the third embodiment will be described with reference to FIG.

  The drive circuit 300 is different from the drive circuits 100 and 200 of the first and second embodiments in that the drive circuit 300 includes a drive switch 316 and an interlocking switch 319. The drive switch 316 is a changeover switch including two ON terminals A and B and an output terminal. The output terminal of the drive switch 316 has three states, either connected to one of the two ON terminals A and B (ON) or not connected to either of the two ON terminals A and B (OFF). Take. Which of the two ON terminals A and B the output terminal of the drive switch 316 is connected to is set by the user's hand, for example, with the operation panel 15 provided in the power supply unit 10 (FIG. 1). Can do. The interlock switch 319 is turned off when the drive switch 316 is ON (the output terminal is connected to one of the two ON terminals A and B), and the drive switch 316 is OFF (the output terminal is 2). This is an ON / OFF switch that is turned on when it is not connected to any one of the two ON terminals A and B).

  The drive circuit 300 includes a battery 12, a drive switch 316, a motor 50, an LED circuit 17, an LED 18, and an interlocking switch 319.

  The positive terminal of the battery 12 is connected to the output terminal of the drive switch 316. The ON terminal A of the drive switch 316 is connected to one terminal of the motor 50. The other terminal of the motor 50 is connected to the negative terminal of the battery 12. The ON terminal B of the drive switch 316 is connected to the plus terminal of the LED circuit 17. The minus terminal of the LED circuit 17 is connected to the plus terminal of the motor 50. Both terminals of the interlock switch 319 are connected to the other terminal of the motor 50 and the plus terminal of the LED circuit 17, respectively.

  Next, with reference to FIG.1 and FIG.6, operation | movement of the electric brush cutter 1 provided with the drive circuit 300 is demonstrated.

  First, the case where the output terminal of the drive switch 316 is set to be connected to the ON terminal A will be described.

  When the drive switch 316 is switched from OFF to ON by the operation of the trigger 26, the interlock switch 319 is switched OFF. Thus, the drive circuit 300 is in a circuit state in which the motor 50 and the battery 12 are connected and the LED circuit 17 is disconnected from the battery 12. Therefore, the motor 50 receives the supply of electric power from the battery 12 and rotationally drives the cutting blade 42. Further, the LED circuit 17 is not supplied with power and does not cause the LED 18 to emit light.

  When the drive switch 316 is switched from ON to OFF by the operation of the trigger 26, the interlock switch 319 is switched ON. Thus, the drive circuit 300 is in a circuit state in which the motor 50 and the LED circuit 17 are both disconnected from the battery 12 and the motor 50 and the LED circuit 17 are connected. At this time, the motor 50 generates electric power due to the rotation of the motor 50 and the cutting blade 42, and the LED circuit 17 that supplies power to the LED circuit 17 is supplied from the motor 50 until the motor 50 and the cutting blade 42 are stationary. The LED 18 is caused to emit light by the electric power.

  Next, the case where the output terminal of the drive switch 316 is set to be connected to the ON terminal B will be described.

  When the drive switch 316 is switched from OFF to ON by the operation of the trigger 26, the interlock switch 319 is switched OFF. As a result, the drive circuit 300 enters a circuit state in which the motor 50 and the LED circuit 17 are both connected to the battery 12. Therefore, the motor 50 generates power by the rotation of the motor 50 and the cutting blade 42 due to the inertia, and supplies power to the LED circuit 17. The LED circuit 17 causes the LED 18 to emit light by the electric power supplied from the motor 50 until the motor 50 and the cutting blade 42 are stationary.

  When the drive switch 316 is switched from ON to OFF by the operation of the trigger 26, the interlock switch 319 is switched ON. Thus, the drive circuit 300 is in a circuit state in which the motor 50 and the LED circuit 17 are both disconnected from the battery 12 and the motor 50 and the LED circuit 17 are connected. At this time, the motor 50 generates power by rotation of the motor 50 and the cutting blade 42 due to inertia, and supplies power to the LED circuit 17. The LED circuit 17 causes the LED 18 to emit light by the electric power supplied from the motor 50 until the motor 50 and the cutting blade 42 are stationary.

  According to the drive circuit 300 configured as described above, the LED 18 is caused to emit light when the drive switch 316 is switched from ON to OFF, and whether or not the LED 18 is caused to emit light is selected according to user preference when the drive switch 316 is ON. be able to. Therefore, it can be easily recognized that the cutting blade 42 of the electric brush cutter 1 is rotating, and the convenience of the electric brush cutter 1 can be improved.

  In the present embodiment, the drive switch 316 constitutes a drive switch and a light emission restriction switch according to the present invention.

  In addition, this invention is not limited to the above-mentioned embodiment, What changed variously in the range described in the claim is also contained in the technical scope of this invention.

  For example, the motor 50 according to the embodiment is a commutator motor including a rotor 53 having a coil disk 62 and a stator 54 having a magnet 71, but the motor according to the present invention is not limited thereto. For example, it may be a brushless motor composed of a rotor having a magnet and a stator having a coil disk. Moreover, although the coil disk of embodiment was comprised from the printed wiring board, the coil disk which concerns on this invention is not limited to this, For example, from the some thin coil etc. which were arranged in disk shape It may be configured. Moreover, although the motor 50 of the embodiment is configured from a coreless motor, the motor according to the present invention may be configured from a motor having a coil wound around a core.

  Moreover, although LED17 of embodiment was arrange | positioned in the operation panel 15 of the power supply part 10, the light emission part which concerns on this invention is not limited to this, For example, a motor is used so that a cutting blade may be illuminated. It may be arranged.

  The drive switch according to the present invention is not limited to the drive switches 16 and 316 of the embodiment. For example, a variable speed switch that adjusts the output (rotation speed) of the motor according to the pulling amount of the trigger 26. It may be.

  Further, the drive circuit of the electric brush cutter according to the present invention is not limited to the drive circuits 100, 200, and 300 of the embodiment, and supplies the light generated by the motor to the light emitting unit when the drive switch is turned off. If it can be done, it can be arbitrarily modified.

In addition, the material, shape, quantity, arrangement, and the like of each component can be appropriately changed as long as the object of the present invention can be achieved.

DESCRIPTION OF SYMBOLS 1 Electric brush cutter 7 Axis 10 Power supply part 11 Power supply housing 12 Battery 15 Operation panel 16 Drive switch 17 LED circuit 18 LED (light emission part)
19 Light emission restriction switch 20 Operation rod 25 Grip part 26 Trigger 27 Wire 30 Connection part 32 Auxiliary handle 34 Protective cover 39 Power line 40 Drive part 42 Cutting blade 50 Motor 51 Motor housing 52 Output shaft 53 Rotor 54 Stator 55 Slider 57, 58 Bearing 59 Slider holder 61 Flange 62 Coil disk 63 Commutator 71 Magnet 72, 73 Yoke 100, 200, 300 Drive circuit 316 Drive switch 319 Interlocking switch

Claims (7)

An operating rod having a long connecting portion and a gripping portion;
A motor supported by one end of the connecting portion;
A cutting blade driven to rotate by the motor;
A power supply unit disposed on the operating rod and supplying power to the motor;
A drive switch for turning on / off power supply to the motor;
A light emitting unit that emits light by electric power generated by rotation of the motor due to inertia when the drive switch is switched from on to off;
Electric brush cutter characterized by that. The drive switch is
A first circuit state in which the motor and the power supply unit are connected;
A second circuit state in which the motor and the power supply unit are cut off and the motor and the light emitting unit are connected; and
The electric brush cutter according to claim 1. The light emitting unit emits light by electric power supplied from the power supply unit when the drive switch is on.
The electric brush cutter according to claim 1 or 2, characterized by the above. A light emission restriction switch for restricting light emission of the light emitting unit;
The electric brush cutter according to any one of claims 1 to 3. The light emission restriction switch is
A third circuit state in which power is supplied to the light emitting unit;
Switching between a fourth circuit state in which power is not supplied to the light emitting unit,
The electric brush cutter according to claim 4. The motor is composed of a coreless motor,
The electric brush cutter according to any one of claims 1 to 5, wherein the electric brush cutter is provided. The motor includes a rotor, a stator, and an output shaft provided coaxially with the rotor,
Either one of the rotor and the stator is a disk-shaped coil disk having a plurality of substantially annular coils arranged in a circumferential direction around the output shaft when viewed in the axial direction of the output shaft. Prepared,
Either one of the rotor and the stator includes magnetic flux generation means for generating magnetic flux that passes through the coil disk in the axial direction of the output shaft.
The electric brush cutter according to any one of claims 1 to 6.

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