Power work machine

Abstract

To require a power work machine which can suppress loss of an amount of light from a start end face to a terminal end face in a light guide rod and brightly illuminate an irradiation region.SOLUTION: A power work machine 1 includes an LED 31 which is stored in a body housing 11. The power work machine 1 further includes a first light guide rod 32 which has a first start end face 32a facing the LED 31, guides light incident from the first start end face 32a up to a first terminal end face 32c and emits light from the first terminal end face 32c. The power work machine 1 further includes a second light guide rod 35 which has a second start end face 35a facing the LED 31, guides light incident from the second start end face 35a up to a second terminal end face 35c, and emits light from the second terminal end face 35c.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present invention relates to a power working machine used for cutting a workpiece such as wood. [Background technology]

[0002] For example, power tools known as routers or trimmers (English: laminate trimmers) are used primarily for cutting work such as edge processing and groove cutting on workpieces such as wood. This type of power tool has an electric motor as a drive source, an output shaft that rotates by the driving force of the electric motor, and a base that abuts against the top surface of the workpiece. The output shaft extends vertically from below the electric motor to the bottom surface of the base. A cutting tool attached to the tip of the output shaft is pressed against the edge or top surface of the workpiece while rotating around the output shaft with the cutting tool protruding downward from the base. This allows the workpiece to be cut.

[0003] A power working machine is equipped with a lighting device to improve visibility of the tip of the cutting tool cutting into the workpiece and visibility when aligning the fillet line drawn on the workpiece with the tip of the cutting tool. Patent Document 1 discloses a power working machine having two sets of lighting devices equipped with LEDs. Each lighting device is unitized and installed in a housing that accommodates an electric motor. Each lighting device illuminates the area where the cutting tool descends from above toward the base below. Each lighting device is installed at positions separated from each other, for example, at positions symmetrically spaced a predetermined distance from the output shaft.

[0004] As described in the cited document 1, the unitized lighting devices installed in the conventional power working machine had to be equipped with one LED each. Moreover, each lighting device was unitized using hard synthetic resin or the like. Therefore, it was difficult to significantly change the shape of each lighting device. Therefore, for example, when the power working machine was required to be made more compact and the space inside the housing was reduced, it was difficult to change the shape of two lighting devices to fit the narrow space.

[0005] Cited Document 2 discloses a structure in which light emitted from one LED is guided to an irradiation area using a light guide rod made of soft acrylic resin. The LED emits light toward one tip face (starting end face) of the light guide rod. As the light guide rod extends, it branches into multiple branch light guide rods. Each end face of the branch light guide rods illuminates, for example, the periphery of the tip of the tool tip that comes into contact with the workpiece. Only one LED is required, and the shape of the light guide rod can be changed to, for example, a shape that follows the outer shape of the housing.

[0006] However, in the case of the light guide rod described in the cited document 2, there is a large loss of light, especially at the branched portion, and the amount of light irradiated at each end surface may be reduced. If the light guide rod is simply branched into a Y-shape, light leaks out of the light guide rod from the base of the branch. On the other hand, if it is attempted to suppress the loss of light at the branched portion, the shape around the branched portion becomes complex, and the shape of the mold for forming the light guide rod also becomes complex. This leads to an increase in costs. In addition, a certain space is required to attach a light guide rod of a complex shape to the tool body, and it is difficult to accommodate it in a limited space, for example, in a housing. Therefore, there is room for improvement in order to further compactify the power working machine. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2002-337073 A [Patent Document 2] JP 2011-167796 A Summary of the Invention [Problem to be solved by the invention]

[0008] Therefore, there is a need for a power working machine that can suppress the loss of light from the starting end face to the terminal end face of the light guide rod and brightly illuminate the irradiation area. [Means for solving the problem]

[0009] According to one feature of the present disclosure, a power working machine has a light source accommodated in a main housing. The power working machine has a first light guiding rod having a first end surface facing the light source and guiding light incident from the first end surface to a first end surface to irradiate the light from the first end surface. The power working machine has a second light guiding rod having a second end surface facing the light source and guiding light incident from the second end surface to a second end surface to irradiate the light from the second end surface.

[0010] Therefore, the light emitted from the light source directly enters the first light guiding rod from the first starting end face, and directly enters the second light guiding rod from the second starting end face. The first light guiding rod is provided without branching from the first starting end face, which is the light receiving surface, to the first end face, which is the light emitting surface. The second light guiding rod is provided without branching from the second starting end face, which is the light receiving surface, to the second end face, which is the light emitting surface. This makes it possible to suppress the loss of light from the first starting end face to the first end face, and also to suppress the loss of light from the second starting end face to the second end face. Moreover, the irradiation area can be illuminated from two places, the first end face and the second end face. Thus, the loss of light passing through the first light guiding rod and the second light guiding rod can be suppressed, and the irradiation area can be brightly illuminated.

[0011] Also, the first light guiding rod and the second light guiding rod can be provided in independent shapes. This increases the degree of freedom in the shapes and mounting postures of the first light guiding rod and the second light guiding rod. This allows the first light guiding rod and the second light guiding rod to be arranged in a limited space in the main housing, and prevents an increase in the cost of the molds for forming the first light guiding rod and the second light guiding rod. Also, since the number of light sources can be reduced, the main housing can be made more compact. [Brief description of the drawings]

[0012] [Figure 1] 1 is an overall perspective view of a power working machine according to a first embodiment of the present disclosure; [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4]FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3, showing a vertical cross-sectional view of the power working machine. [Diagram 5] 3 is a cross-sectional view taken along line VV in FIG. 2 and is a vertical cross-sectional view of the power working machine. [Figure 6] FIG. 6 is a cross-sectional view of the power working machine taken along line VI-VI in FIG. 2. [Figure 7] FIG. 2 is a bottom view of the power working machine with the base removed. [Figure 8] FIG. 2 is a perspective view of a first light guiding rod and a second light guiding rod. [Figure 9] 11 is a perspective view including a partial vertical cross section showing an assembled state of a right half of a motor housing, a bracket, a first light guiding rod, and a second light guiding rod. FIG. [Figure 10] 11 is an enlarged perspective view including a partial vertical cross section showing an assembled state of a left half of the motor housing, a bracket, a first light guiding rod, and a second light guiding rod. FIG. [Figure 11] 2 is a rear view of the light source device, the first light guiding rod, and the second light guiding rod. FIG. [Figure 12] FIG. 2 is a top view of the bracket, the first light guiding rod, and the second light guiding rod. [Figure 13] FIG. 11 is a rear view of the first light guiding rod and the second light guiding rod in the second embodiment. [Figure 14] FIG. 11 is a top view of a first light guiding rod and a second light guiding rod according to a second embodiment. [Figure 15] FIG. 13 is a rear view showing a light guiding rod of a comparative example. [Figure 16] FIG. 13 is a top view showing a light guiding rod of a comparative example. [Figure 17] 1A is a diagram showing a case where an illumination area is illuminated by a first light guiding rod and a second light guiding rod according to a first embodiment. FIG. [Figure 18] 13 is a diagram showing a case where an illumination area is illuminated with a light guiding rod according to a comparative example. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] According to another feature of the present disclosure, at least one of the first light guiding rod and the second light guiding rod includes a curved portion that is columnar over the entire length and at least a portion of which is curved. Therefore, by providing the curved portion, the degree of freedom in the arrangement and orientation of the first starting end surface and the second starting end surface is increased, and the degree of freedom in the arrangement and orientation of the first end surface and the second end surface is also increased. Therefore, it is easy to respond to changes in the arrangement of the first starting end surface, the second starting end surface, and the light source without increasing the size of the first light guiding rod and the second light guiding rod. In addition, it is easy to respond to design changes in the distance to the irradiation area of ​​the first end surface and the second end surface, and the irradiation angle, without increasing the size of the first light guiding rod and the second light guiding rod.

[0014] According to another feature of the present disclosure, the main housing is cylindrical to accommodate the electric motor. The curved portion of the first light guiding rod or the second light guiding rod extends in the circumferential direction along the inner peripheral surface of the main housing. Therefore, the first light guiding rod or the second light guiding rod can be accommodated in the main housing while preventing the main housing from becoming too large.

[0015] According to another feature of the present disclosure, the power working machine has an electric motor accommodated in a main body housing. The curved portion of the first light guiding bar or the second light guiding bar includes a first curved portion curved along an imaginary plane perpendicular to the motor axis of the electric motor, and a second curved portion curved from the imaginary plane in a direction along the motor axis. Therefore, the first curved portion can be accommodated in the main body housing by utilizing a shape that accommodates the electric motor without increasing the size of the main body housing. In addition, the second curved portion can be accommodated in the main body housing by utilizing a shape that accommodates an output shaft of the electric motor extending in the motor axis direction without increasing the size of the main body housing. Thus, the size of the main body housing can be suppressed.

[0016] According to another feature of the present disclosure, the first light guiding rod or the second light guiding rod has a mounting seat attached to the main housing. The mounting seat is provided on a side surface of the curved portion spaced apart from the outer circumferential curved surface of the curved portion. Therefore, the mounting seat can be provided at a location spaced apart from the light path. The outer circumferential curved surface is located on the light path as a reflective surface for light traveling through the first light guiding rod and the second light guiding rod. If the mounting seat is provided on the outer circumferential curved surface, the light will easily enter the mounting seat from the outer circumferential curved surface. This results in a loss of light. By spacing the mounting seat away from the outer circumferential curved surface on the light path, the loss of light can be suppressed.

[0017] According to another feature of the present disclosure, a first space is provided between the light emitting end surface of the light source device including the light source and the first starting end surface of the first light guiding rod. A second space is provided between the light emitting end surface of the light source device and the second starting end surface of the second light guiding rod. Therefore, when the power work machine is assembled or vibration occurs during operation, the light emitting end surface, the first starting end surface, and the second starting end surface can be prevented from being damaged. This can prevent the light transmittance of the first light guiding rod, the second light guiding rod, and the light emitting end surface from being reduced. In addition, by providing the first space and the second space, restrictions on the shape of the light source device are reduced. Therefore, a general-purpose light source device can be used.

[0018] According to another feature of the present disclosure, the main housing includes a first housing and a second housing that are assembled to each other. The light source is attached to the first housing. The first light guiding rod and the second light guiding rod are attached to the second housing. Therefore, by assembling the first housing and the second housing to each other, the light source, the first light guiding rod, and the second light guiding rod can be positioned relative to each other without adjustment. Therefore, the ease of assembly of the light source, the first light guiding rod, and the second light guiding rod can be improved.

[0019] According to another feature of the present disclosure, a power source, wiring extending from the power source, and a light source connected to the wiring are attached to the first housing. No electrical components connected to the wiring are provided in the second housing. Therefore, by gathering the electrical components including the light source on the first housing side, it is not necessary to provide the wiring in the second housing. Therefore, first, the electrical components including the light source and the wiring are assembled to the first housing, and the first light guiding rod and the second light guiding rod are assembled to the second housing. After that, the first housing and the second housing are assembled to each other. This can improve the ease of assembly of the main housing.

[0020] According to another feature of the present disclosure, the power working machine has an electric motor housed in a main housing. The power working machine has an output shaft extending from the electric motor. The power working machine has a cooling fan that rotates by the output shaft to generate wind for cooling the electric motor. A light source is disposed between the electric motor and the cooling fan and within the main housing. Thus, the light source is housed in the empty space between the electric motor and the cooling fan, and is disposed in a position closer to a power source electrically connected to the electric motor than the cooling fan. This makes it possible to prevent wiring for supplying power to the light source from being disposed near the cooling fan. This makes it possible to prevent the main housing from becoming larger around the cooling fan.

[0021] According to another feature of the present disclosure, a groove extending beyond the cooling fan is provided on the inner peripheral surface of the main housing facing the cooling fan, and the first light guiding rod and / or the second light guiding rod are inserted into the groove. Therefore, the first light guiding rod and / or the second light guiding rod can be disposed across the radially outer side of the cooling fan while suppressing an increase in size of the main housing. Also, the groove can position the area close to the first starting end face of the first light guiding rod and / or the area close to the second starting end face of the second light guiding rod. Therefore, the ease of assembly of the first light guiding rod and / or the second light guiding rod can be improved.

[0022] According to another feature of the present disclosure, the first start end surface of the first light guiding rod and the second start end surface of the second light guiding rod are adjacent to each other and located on the same virtual plane or parallel to each other. The first end surface of the first light guiding rod and the second end surface of the second light guiding rod are spaced apart from each other. Therefore, the first start end surface and the second start end surface can be arranged together near a light source provided at one location. Therefore, the area around the light source can be made compact. In addition, by spacing the first end surface and the second end surface from each other, it is possible to suppress the occurrence of shadows in the illuminated area. Therefore, it is possible to improve the visibility of the illuminated area.

[0023] According to another feature of the present disclosure, the first start end of the first light guiding rod including the first start end surface and the second start end of the second light guiding rod including the second start end surface are joined together side by side. This reduces the number of parts, thereby reducing the number of dies for forming the first light guiding rod and the second light guiding rod. This reduces manufacturing costs. In addition, the effort required to adjust the relative positions of the first light guiding rod and the second light guiding rod during assembly can be reduced. This improves the ease of assembly of the first light guiding rod and the second light guiding rod.

[0024] According to another feature of the present disclosure, the first light guiding rod and the second light guiding rod are formed of a single material with a light transmittance of 80% or more per mm. Therefore, the high light transmittance can suppress the loss of light from the first starting end face to the first end face of the first light guiding rod and from the second starting end face to the second end face of the second light guiding rod. Moreover, by forming them from a single material, the manufacturing cost can be suppressed, and the light path can be easily simulated, making it easy to respond to design changes.

[0025] According to another feature of the present disclosure, the power working machine has a light source housed in a main housing. The power working machine has a first light guiding rod having a first start end surface facing the light source and guiding light incident from the first start end surface to a first end surface to irradiate the light from the first end surface. The main housing is cylindrical to house the electric motor and includes a first housing and a second housing assembled to each other. The first light guiding rod is columnar over its entire length and includes a curved portion at least a portion of which is curved. The curved portion of the first light guiding rod extends in the circumferential direction along the inner peripheral surface of the main housing. The light source is attached to the first housing, and the first light guiding rod is attached to the second housing. A first space is provided between a light emitting end surface of the light source device including the light source and the first start end surface of the first light guiding rod.

[0026] Therefore, the light emitted from the light source directly enters the first light guide rod from the first starting end surface and is sent to the first end surface through the first light guide rod that does not branch. Therefore, the loss of the amount of light from the first starting end surface to the first end surface can be suppressed. By providing the curved portion, the arrangement and orientation of the first starting end surface and the first end surface can be freely changed without increasing the size of the first light guide rod. By arranging the curved portion along the inner peripheral surface, the first light guide rod can be accommodated in the main housing while suppressing the increase in size of the main housing. By assembling the first housing and the second housing to each other, the light source and the first light guide rod can be positioned relative to each other without adjustment. Therefore, the assembling property of the light source and the first light guide rod can be improved. By providing the first space, it is possible to suppress damage to the light emitting end surface and the first starting end surface when the power work machine is assembled or when it vibrates during operation. This suppresses the reduction in the light transmittance of the first light guide rod and the light emitting end surface. In addition, by securing the first space, there are fewer restrictions on the shape of the light source device. Therefore, a general-purpose light source device can be used.

[0027] Next, an embodiment of the present disclosure will be described with reference to Figs. 1 to 12. In this embodiment, a power working machine 1, so-called a router, is illustrated as an example of a power working machine. The power working machine 1 has a window 3e (see Fig. 3), which will be described later. A user holds the power working machine 1 with the window 3e facing away from the user. In the following description, the side with the window 3e is the front side, and the opposite side with the window 3c is the rear side. The up, down, left and right directions are defined as directions seen from a worker positioned at the rear side of the power working machine 1 (right side in Fig. 3). As shown in Figs. 1 to 3, the power working machine 1 has a disk-shaped base 2 that abuts on the upper surface of the workpiece W, a main body support part 3 that is connected to the base 2 above the base 2, and a tool main body 10 that is supported by the main body support part 3 so as to be movable up and down. An electric motor 20 (see Fig. 4) serving as a drive source is accommodated in a main body housing 11 of the tool main body 10.

[0028] As shown in Figures 4, 6, 9 and 10, the main housing 11 has a motor housing (first housing) 12 made of resin with a left and right half structure, and a bracket (second housing) 16 made of resin that covers the outer periphery of the motor housing 12. The right half 12b of the motor housing 12 separated into left and right halves is shown in Figure 9, and a part of the left half 12a is shown in Figure 10. The motor housing 12 has a cylindrical portion 12i having a cylindrical shape at the bottom, and a bulging portion 12j that bulges out to the side above the cylindrical portion 12i. The bracket 16 is formed in a cylindrical shape that covers the outer periphery of the cylindrical portion 12i.

[0029] As shown in Figs. 1, 4 and 5, the main body support part 3 has a cylindrical base connecting part 3a connected to the base 2, and a generally cylindrical part 3b above the base connecting part 3a that covers the outer periphery of the bracket 16. The base connecting part 3a is thin in the vertical direction and is formed to have approximately the same thickness as the base 2. The base 2 is provided with circular through holes 2a and 2b that penetrate in the vertical direction. The through hole 2a is provided in the center of the base 2 with a diameter that allows a tip cutting tool 22, which will be described later, to pass through. A plurality of through holes 2b are provided around the through hole 2a, for example, six through holes are provided at equal angular intervals of 60° in the circumferential direction. The through holes 2a and 2b are exposed upward from the base connecting part 3a.

[0030] As shown in Figs. 1 to 3, a window 3c is provided at the rear of the cylindrical portion 3b, which is opened so that the inside of the cylindrical portion 3b can be seen. A window 3e is provided at the front of the cylindrical portion 3b, which is opened so that the inside of the cylindrical portion 3b can be seen. An operator can see the base 2 including the cutting tool 22 and the through holes 2a and 2b from the outside by looking through the windows 3c and 3e. A pair of grip support parts 3d that protrude substantially horizontally outward to the left and right are provided at the left and right sides of the cylindrical portion 3b. A grip 6 is attached to each grip support part 3d. The grip 6 has a substantially cylindrical arm part 6a connected to the grip support part 3d and a grip part 6b provided at the tip of the arm part 6a. The grip part 6b is inclined downward from the front to the rear and has a longitudinal direction in the inclined direction. An operator can move the power working machine 1 horizontally along the top surface of the workpiece W by gripping the pair of left and right grip parts 6b, respectively.

[0031] 3 and 6, a lock lever 4 is provided at the front of the cylindrical portion 3b so as to be able to open and close. When the lock lever 4 is open, the main body housing 11 can move up and down relative to the main body support portion 3. By moving the main body housing 11 up and down, the cutting depth of the cutting tool 22 into the workpiece W can be changed. When the lock lever 4 is closed as shown in the figures, the main body housing 11 is fixed at a predetermined height by moving it up and down relative to the main body support portion 3.

[0032] As shown in Figs. 4 and 5, a height adjustment dial 5 capable of changing the height of the main body housing 11 is provided above the main body support part 3 and below the bulging part 12j of the motor housing 12. The height adjustment dial 5 is supported on the upper end of the main body support part 3 so as to be rotatable in the horizontal direction. A helical protrusion 5a is provided on the inner peripheral surface of the height adjustment dial 5, which extends in a helical manner in the circumferential direction and protrudes inward in the radial direction. A helical recess 16d is provided on the outer peripheral surface of the bracket 16, which extends in a helical manner in the circumferential direction and is concave inward in the radial direction. The helical protrusion 5a and the helical recess 16d are screwed together. The bracket 16 is prevented from rotating with respect to the main body support part 3. When the height adjustment dial 5 is rotated in the horizontal direction, the bracket 16, which is prevented from rotating, is moved up and down by the screwing of the helical protrusion 5a and the helical recess 16d. This allows the main body housing 11 to move up and down with respect to the main body support part 3.

[0033] As shown in Figs. 4 and 5, the electric motor 20 is mounted inside the cylindrical portion 12i of the motor housing 12. The electric motor 20 is a so-called brushless DC motor, and includes a rotor 20b, a stator 20c, and a sensor board 20f. The rotor 20b is integral with the output shaft 20a. The output shaft 20a rotates about a motor axis J extending in the vertical direction at the center of the cylindrical portion 12i. The output shaft 20a is rotatably supported by bearings 20d and 20e. A left-right connecting portion 12g that connects the left half portion 12a and the right half portion 12b to the left and right is provided at the top of the cylindrical portion 12i above the electric motor 20. The upper bearing 20d is press-fitted into a cylindrical recess 12h recessed in the center of the left-right connecting portion 12g. The lower bearing 20d is press-fitted into a cylindrical recess 16f recessed in the center lower portion of the bracket.

[0034] 4 and 5, the stator 20c is fixed radially outward of the rotor 20b along the inner circumferential surface of the motor housing 12. The sensor board 20f is fixed above the rotor 20b along the upper surface of the stator 20c. A magnetic sensor that detects the rotational position of the rotor 20b is mounted on the sensor board 20f.

[0035] As shown in Figs. 4 and 5, a cooling fan 21 that generates airflow for cooling the electric motor 20 is attached to the output shaft 20a. The cooling fan 21 is located between the rotor 20b and the lower bearing 20e in the vertical direction. The cooling fan 21 rotates integrally with the output shaft 20a around the motor axis J when driven by the electric motor 20. When the cooling fan 21 rotates, airflow is generated that flows from above to below. A plurality of intake holes 12c penetrating the bulging portion 12j in the horizontal direction are provided on the left and right side surfaces of the bulging portion 12j (see Fig. 1). A plurality of exhaust holes 16b penetrating the bracket 16 in the vertical direction and aligned in the circumferential direction along the inner peripheral surface 16c of the bracket 16 are provided in the lower portion of the bracket 16 (see Figs. 7 and 12). When the cooling fan 21 rotates, outside air is introduced into the motor housing 12 through the intake holes 12c. The introduced outside air flows downward and is exhausted from the exhaust hole 16b to the outside of the main body housing 11. The flow of air cools the electric motor 20 and the controller 24 housed in the bulging portion 12j. The controller 24 will be described in detail later.

[0036] 4 and 5, the output shaft 20a is inserted into a through hole 16a that passes through the center of the lower part of the bracket 16 in the vertical direction and protrudes downward. A substantially conical flange 17 is attached to the lower part of the bracket 16. The output shaft 20a protrudes downward beyond the flange 17. A cutting tool 22 that cuts the workpiece W by being driven by the electric motor 20 is attached to the tip of the output shaft 20a.

[0037] As shown in Figs. 1 to 3, a battery attachment section 15 is provided on the upper part of the tool body 10, on the upper surface of the bulge 12j of the motor housing 12. A battery 23 is removably attached to the battery attachment section 15 as a power source. The battery 23 is a lithium ion battery having a plurality of battery cells housed in a case, and can be used repeatedly by charging it with a separately prepared charger. The battery 23 is attached to the battery attachment section 15 by sliding it backward, and is removed from the battery attachment section 15 by sliding it forward. The battery 23 can be used as a power source for other rechargeable power tools, such as a screwdriver or an electric drill.

[0038] As shown in Figs. 4 and 5, a controller 24 for mainly controlling the operation of the electric motor 20 is installed in the bulging portion 12j of the motor housing 12 below the battery mounting portion 15. The controller 24 is a rectangular shallow-bottomed case in which a control board is housed and resin-molded, and has a generally flat shape. The controller 24 is housed in the bulging portion 12j with its thickness direction in the up-down direction. The bottom surface of the controller 24 is located slightly above the intake hole 12c. The controller 24 is equipped with a control circuit made of a microcomputer, a drive circuit made of FET, an auto-stop circuit, and the like. The control circuit transmits a control signal based on the rotational position information of the rotor 20b detected by the sensor board 20f. The drive circuit switches the current of the electric motor 20. The auto-stop circuit detects the power supply state of the battery 23 and cuts off the power supply to the electric motor 20 according to the detection result so as to prevent over-discharge or over-current.

[0039] As shown in Figs. 1, 2 and 5, a switch panel 13 is provided on the rear surface of the bulging portion 12j of the motor housing 12. The switch panel 13 is provided with a standby switch 13a and a lock-on switch 13b that are operated by pressing. The standby switch 13a is turned on by pressing it once. When the standby switch 13a is turned on, the power working machine 1 transitions from a resting state to a standby state. In the standby state, power is supplied from the battery 23 to the controller 24. The lock-on switch 13b is turned on by pressing it once. When the lock-on switch 13b is turned on while the power working machine 1 is in the standby state, the power working machine 1 transitions to a driving state. In the driving state, power supply from the battery 23 to the electric motor 20 is maintained, and the driving of the electric motor 20 is maintained.

[0040] When the standby switch 13a or the lock-on switch 13b is pressed once while the power working machine 1 is in a driving state, the controller 24 stops the power supply from the battery 23 to the controller 24 and the electric motor 20, respectively. This causes the power working machine 1 to transition to a resting state. Also, when the lock-on switch 13b is not pressed for a predetermined time while the power working machine 1 is in a standby state, the controller 24 turns the standby switch 13a to an OFF state. This causes the power working machine 1 to transition from a standby state to a resting state. A horizontally rotatable speed change dial 14 is provided on the left side of the bulging portion 12j. The rotation speed of the electric motor 20 can be adjusted by rotating the speed change dial 14. As described above, the controller 24, the electric motor 20, the switch panel 13, the speed change dial 14, and the light source device 30, which will be described later, which are electrically connected to the battery 23, are all attached to the motor housing 12. These electrical components are not directly attached to the bracket 16.

[0041] As shown in Figs. 5, 9, and 10, the light source device 30 for illuminating the peripheral area of ​​the cutting tool 22 is installed in the front part of the motor housing 12. The light source device 30 is located below the stator 20c and above the cooling fan 21 in the vertical direction. The light source device 30 is formed in a substantially rectangular box shape. Two LEDs (light sources) 31 are accommodated side by side in the light source device 30 (see Fig. 11). The two LEDs 31 emit light downward. A lens capable of transmitting light emitted by the LEDs 31 is provided as a light emitting end surface 30a on the lower surface of the light source device 30. A wiring connection portion 30c is provided on the upper part of the light source device 30, which is electrically connected to each LED 31 and extends outward from the light source device 30. The wiring connection portion 30c is electrically connected to the wiring (lead wire) 25 extending downward from the controller 24. The wiring 25 extends to the light source device 30 located above the cooling fan 21, and does not extend, for example, to the periphery of the cooling fan 21. The two LEDs 31 receive power from the battery 23 via the controller 24, the wiring 25, and the wiring connection part 30c. The two LEDs 31 emit light when power is supplied from the battery 23 when the power working machine 1 is in a standby state or a driving state.

[0042] As shown in Figs. 6, 9, and 10, the left half 12a and the right half 12b are provided with a substantially rectangular box-shaped light source housing 12d that houses substantially half of the light source device 30. The rear surface of the light source device 30 is provided with an engagement protrusion 30b that protrudes rearward. The rear surfaces of the left and right light source housings 12d are provided with a notch 12e. When the left half 12a and the right half 12b are engaged with each other, the left and right light source housings 12d are adjacent to each other to form a box-shaped space. The light source device 30 is housed in the box-shaped space formed by the left and right light source housings 12d. The lower surfaces of the left and right light source housings 12d are open so as not to interfere with the light emitted downward from the light emitting end surface 30a. When the left half 12a and the right half 12b are engaged with each other, the left and right cutouts 12e are adjacent to each other to form a through hole. The engaging protrusions 30b of the light source device 30 are inserted into the through holes formed by the left and right cutouts 12e. The left and right cutouts 12e are engaged with the engaging protrusions 30b to hold the light source device 30 in place so that it does not fall out of the light source accommodating section 12d. The light source device 30 is accommodated in the light source accommodating section 12d, and is disposed near the outer periphery of the motor housing 12 where the flow of air generated by the cooling fan 21 is not impeded.

[0043] 6, 9, and 10, the left half portion 12a and the right half portion 12b have a notch shape that extends linearly in the vertical direction below the light source housing portion 12d. When the left half portion 12a and the right half portion 12b are engaged with each other, the left and right notch shapes cooperate to form a groove 12f that extends in the vertical direction. The groove 12f is located on the radial outer periphery of the cooling fan 21 and extends beyond the cooling fan 21 in the vertical direction. A first light guiding rod 32 and a second light guiding rod 35, which will be described later, are inserted into the groove 12f.

[0044] 4, 5, 9, and 10, the main housing 11 contains a first light guiding rod 32 and a second light guiding rod 35 that guide the light emitted by the two LEDs 31 to an irradiation area such as the periphery of the cutting tool 22. The first light guiding rod 32 and the second light guiding rod 35 are each formed as a single rod that extends in a columnar shape without branching. The first light guiding rod 32 and the second light guiding rod 35 are attached to the lower part of the bracket 16.

[0045] The first light guiding rod 32 and the second light guiding rod 35 are each formed of a single material having high light transmittance. The first light guiding rod 32 and the second light guiding rod 35 are preferably formed of a single material having high light transmittance, such as acrylic. The light transmittance per mm of the first light guiding rod 32 is 80% or more, more preferably 85% or more, 90% or more, or 95% or more. The total length of the first light guiding rod 32 is, for example, 20 mm or more, 30 mm or more, 40 mm or more, 50 mm or more, or 60 mm or more. The light transmittance per mm of the second light guiding rod 35 is approximately the same as the light transmittance per mm of the first light guiding rod 32, and is 80% or more, more preferably 85% or more, 90% or more, or 95% or more. The total length of the second light guiding rod 35 is, for example, 20 mm or more, 30 mm or more, 40 mm or more, 50 mm or more, or 60 mm or more.

[0046] As shown in FIGS. 8 and 11, the first light guiding rod 32 has a first starting end face 32a and a first end face 32c at both ends of the columnar extension. The first starting end face 32a and the first end face 32c are each formed in a flat shape. The first starting end face 32a faces upward along the motor axis J, and the first end face 32c faces downward along the motor axis J. The first starting end face 32a and the first end face 32c are substantially circular in shape with an outer periphery formed by a curved line without corners. The cross-sectional shape of the first light guiding rod 32 in a cross section perpendicular to the extension direction is substantially the same as the first starting end face 32a and the first end face 32c.

[0047] As shown in FIGS. 8, 11, and 12, the first light guiding rod 32 has a first starting end 32b extending from a first starting end surface 32a in a substantially perpendicular direction for a predetermined distance. The first light guiding rod 32 includes a curved portion 33 that is curved between the first starting end surface 32a and the first terminal end surface 32c. The first light guiding rod 32 is provided with three curved portions 33, namely, a first curved portion 33a, a second curved portion 33b, and a third curved portion 33c. The third curved portion 33c is provided below the first starting end 32b. The third curved portion 33c curves leftward from a direction along the motor axis J to a horizontal direction along an imaginary plane H perpendicular to the motor axis J. The first curved portion 33a is provided downstream of the third curved portion 33c. The first curved portion 33a curves along the imaginary plane H and follows the inner peripheral surface 16c of the bracket 16. The first curved portion 33a extends in the counterclockwise direction over a length of approximately one-quarter of the circumference of the inner circumferential surface 16c (an angular range of approximately 90°). The second curved portion 33b is provided between the first curved portion 33a and the first terminal surface 32c. The second curved portion 33b curves from a direction along the imaginary plane H to a substantially vertical direction along the motor axis J.

[0048] As shown in FIGS. 8 and 12, the first light guiding rod 32 has a mounting seat 34 integrally formed of the same material. The mounting seat 34 is provided on a side surface 33d of the first curved portion 33a spaced from the outer circumferential curved surface 33e of the first curved portion 33a. The side surface 33d is, for example, the inner circumferential curved surface 33f, the upper surface, and the lower surface of the first curved portion 33a. In this embodiment, the mounting seat 34 located on the inner circumferential curved surface 33f of the first curved portion 33a is illustrated. The mounting seat 34 is formed in a plate shape extending radially inward from the side surface 33d. A circular through hole 34a penetrating in the up-down direction is formed in the center of the mounting seat 34. A boss portion 16e provided so as to protrude upward from the lower surface of the bracket 16 is press-fitted into the through hole 34a. This fixes the first light guiding rod 32 to the bracket 16.

[0049] As shown in FIGS. 8 and 11, the second light guiding rod 35 is provided to the right of the first light guiding rod 32 and is provided substantially symmetrically with the first light guiding rod 32. The second light guiding rod 35 has a second starting end face 35a and a second end face 35c formed in a flat shape at both ends of the rod-like extension. The second starting end face 35a faces upward along the motor axis J, and the second end face 35c faces downward along the motor axis J. The second starting end face 35a and the second end face 35c are substantially circular with an outer periphery formed by a curved line without corners. The cross-sectional shape of the second light guiding rod 35 in a cross section perpendicular to the extension direction is substantially the same as the second starting end face 35a and the second end face 35c.

[0050] As shown in FIGS. 8, 11, and 12, the second light guiding rod 35 has a second starting end 35b extending from the second starting end surface 35a for a predetermined distance in a substantially perpendicular manner. The second light guiding rod 35 includes a curved portion 36 that is curved between the second starting end surface 35a and the second terminal end surface 35c. The second light guiding rod 35 is provided with three curved portions 36, namely, a first curved portion 36a, a second curved portion 36b, and a third curved portion 36c. The third curved portion 36c is provided below the second starting end 35b. The third curved portion 36c curves rightward from a direction along the motor axis J to a horizontal direction along an imaginary plane H perpendicular to the motor axis J. The first curved portion 36a is provided downstream of the third curved portion 36c. The first curved portion 36a curves along the imaginary plane H and so as to follow the inner peripheral surface 16c of the bracket 16. The first curved portion 36a extends in the clockwise direction over a length of approximately one-quarter of the circumference of the inner circumferential surface 16c (an angular range of approximately 90°). The second curved portion 36b is provided between the first curved portion 36a and the second terminal surface 35c. The second curved portion 36b curves from a direction along the imaginary plane H to a substantially vertical direction along the motor axis J.

[0051] As shown in FIGS. 8 and 12, the second light guiding rod 35 has a mounting seat 37 integrally formed of the same material. The mounting seat 37 is provided on a side surface 36d of the first curved portion 36a spaced from the outer circumferential curved surface 36e of the first curved portion 36a. The side surface 36d is, for example, the inner circumferential curved surface 36f, the upper surface, and the lower surface of the first curved portion 36a. In this embodiment, the mounting seat 37 located on the inner circumferential curved surface 36f of the first curved portion 36a is illustrated. The mounting seat 37 is formed in a plate shape extending radially inward from the side surface 36d. A circular through hole 37a penetrating in the up-down direction is formed in the center of the mounting seat 37. A boss portion 16e provided so as to protrude upward from the lower surface of the bracket 16 is press-fitted into the through hole 37a. This fixes the second light guiding rod 35 to the bracket 16.

[0052] 8, 11, and 12, the first starting end 32b of the first light guiding rod 32 and the second starting end 35b of the second light guiding rod 35 are joined together in a left-right arrangement. As a result, the first light guiding rod 32 and the second light guiding rod 35 are integrally formed as a light guiding rod connector 38. By providing the light guiding rod connector 38 as an integral part, the mounting seat 34 also functions as a member for fixing the second light guiding rod 35 to the bracket 16, and the mounting seat 37 also functions as a member for fixing the first light guiding rod 32 to the bracket 16. This improves the stability with which the bracket 16 supports the first light guiding rod 32 and the second light guiding rod 35.

[0053] As shown in FIG. 11, the first start end surface 32a and the second start end surface 35a are disposed adjacent to each other and facing the light emitting end surface 30a at approximately the same height. When the light source device 30 is assembled to the motor housing 12 and the first light guiding rod 32 is assembled to the bracket 16, a first space S1 is provided between the first start end surface 32a and the light emitting end surface 30a. The first start end surface 32a is located approximately directly below one LED 31. When the light source device 30 is assembled to the motor housing 12 and the second light guiding rod 35 is assembled to the bracket 16, a second space S2 is provided between the second start end surface 35a and the light emitting end surface 30a. The second start end surface 35a is located approximately directly below one LED 31. The vertical length of the first space S1 and the second space S2 is, for example, 10 mm or less, 5 mm or less, for example, 1 mm, 2 mm, or 3 mm.

[0054] As shown in Fig. 7, the first end surface 32c is exposed downward in one of the exhaust holes 16b provided on the left side of the bracket 16. The second end surface 35c is exposed downward in one of the exhaust holes 16b provided on the right side of the bracket 16. The first end surface 32c and the second end surface 35c are disposed at positions approximately symmetrical on the left and right sides with respect to the output shaft 20a. The light emitted from the first end surface 32c and the second end surface 35c irradiates the cutting tool 22 and the periphery of the through hole 2a of the base 2 (see Fig. 1).

[0055] FIG. 11 shows a schematic diagram of the path of light passing through the first light guide rod 32. The light passing through the second light guide rod 35 is omitted because it is substantially symmetrical to the first light guide rod 32. The light emitted by the LED 31 and emitted downward from the light emitting end face 30a enters the first light guide rod 32 from the first starting end face 32a. The light travels through the first starting end 32b, the third curved portion 33c, the first curved portion 33a, and the second curved portion 33b in this order while being totally reflected by the wall surface in the first light guide rod 32, and is irradiated downward from the first end face 32c. Each curved portion 33 is formed with a curvature such that the light is totally reflected without leaking from the wall surface. In each curved portion 33, the light is mainly totally reflected by the outer circumferential curved surface 33e (see FIG. 8). Therefore, the light is prevented from entering the mounting seat 34 provided on the side surface 33d separated from the outer circumferential curved surface 33e.

[0056] As described above, the power working machine 1 has an LED 31 housed in the main housing 11 as shown in Figures 9 and 10. The power working machine 1 has a first light guiding rod 32 that has a first start end face 32a facing the LED 31 and guides light incident from the first start end face 32a to a first end face 32c to irradiate the light from the first end face 32c. The power working machine 1 has a second light guiding rod 35 that has a second start end face 35a facing the LED 31 and guides light incident from the second start end face 35a to the second end face 35c to irradiate the light from the second end face 35c.

[0057] Therefore, the light emitted from the LED 31 directly enters the first light guide rod 32 from the first starting end face 32a, and directly enters the second light guide rod 35 from the second starting end face 35a. The first light guide rod 32 is provided without branching from the first starting end face 32a, which is the light receiving surface, to the first end face 32c, which is the light emitting surface. The second light guide rod 35 is provided without branching from the second starting end face 35a, which is the light receiving surface, to the second end face 35c, which is the light emitting surface. This makes it possible to suppress the loss of light from the first starting end face 32a to the first end face 32c, and also to suppress the loss of light from the second starting end face 35a to the second end face 35c. Moreover, the irradiation area can be illuminated from two places, the first end face 32c and the second end face 35c. Thus, the loss of light passing through the first light guide rod 32 and the second light guide rod 35 can be suppressed, and the irradiation area can be brightly illuminated.

[0058] Moreover, the first light guiding rod 32 and the second light guiding rod 35 can be provided in independent shapes. This increases the degree of freedom in the shapes and mounting postures of the first light guiding rod 32 and the second light guiding rod 35. This allows the first light guiding rod 32 and the second light guiding rod 35 to be disposed in a limited space within the main body housing 11, and also suppresses an increase in the cost of the molds for forming the first light guiding rod 32 and the second light guiding rod 35. Furthermore, since the number of LEDs 31 can be reduced, the main body housing 11 can be made more compact.

[0059] As shown in FIG. 8, at least one of the first light guiding rod 32 and the second light guiding rod 35 includes a curved portion 33, 36 that is columnar over the entire length and at least a part of which is curved. Therefore, by providing the curved portion 33, 36, the degree of freedom in the arrangement and orientation of the first starting end face 32a and the second starting end face 35a is increased, and the degree of freedom in the arrangement and orientation of the first end face 32c and the second end face 35c is also increased. Therefore, it is easy to change the arrangement of the first starting end face 32a, the second starting end face 35a, and the LED 31 without increasing the size of the first light guiding rod 32 and the second light guiding rod 35. In addition, it is easy to change the design of the distance to the irradiation area of ​​the first end face 32c and the second end face 35c and the irradiation angle without increasing the size of the first light guiding rod 32 and the second light guiding rod 35.

[0060] As shown in Figures 9 and 10, the main housing 11 is cylindrical so as to accommodate the electric motor 20 (see Figures 4 to 6). The curved portions 33, 36 of the first light guiding rod 32 or the second light guiding rod 35 extend in the circumferential direction along the inner peripheral surface 16c of the main housing 11. Therefore, the first light guiding rod 32 or the second light guiding rod 35 can be accommodated in the main housing 11 while preventing the main housing 11 from becoming too large.

[0061] As shown in FIGS. 4, 5, and 11, the power working machine 1 has an electric motor 20 housed in a main body housing 11. The curved portion 33, 36 of the first light guiding rod 32 or the second light guiding rod 35 includes a first curved portion 33a, 36a that curves along an imaginary plane H perpendicular to the motor axis J of the electric motor 20, and a second curved portion 33b, 36b that curves from the imaginary plane H in a direction along the motor axis J. Therefore, the first curved portion 33a, 36a can be housed in the main body housing 11 by utilizing the shape that houses the electric motor 20 without increasing the size of the main body housing 11. In addition, the second curved portion 33b, 36b can be housed in the main body housing 11 by utilizing the shape that houses the output shaft 20a extending in the direction of the motor axis J without increasing the size of the main body housing 11. Thus, the size of the main body housing 11 can be suppressed.

[0062] As shown in Figs. 8 to 10, the first light guiding rod 32 or the second light guiding rod 35 has mounting seats 34, 37 attached to the main housing 11. The mounting seats 34, 37 are provided on the side surfaces 33d, 36d of the curved portions 33, 36 spaced apart from the outer circumferential curved surfaces 33e, 36e of the curved portions 33, 36. Therefore, the mounting seats 34, 37 can be provided at locations spaced apart from the light path. The outer circumferential curved surfaces 33e, 36e are located on the light path as reflective surfaces for the light traveling through the first light guiding rod 32 and the second light guiding rod 35. If the mounting seats 34, 37 are provided on the outer circumferential curved surfaces 33e, 36e, the light is likely to enter the mounting seats 34, 37 from the outer circumferential curved surfaces 33e, 36e. This results in a loss of light. By separating the mounting seats 34, 37 from the outer circumferential curved surfaces 33e, 36e on the light path, the loss of light can be suppressed.

[0063] As shown in FIG. 11, a first space S1 is provided between the light emitting end surface 30a of the light source device 30 including the LED 31 and the first starting end surface 32a of the first light guiding rod 32. A second space S2 is provided between the light emitting end surface 30a of the light source device 30 and the second starting end surface 35a of the second light guiding rod 35. Therefore, when the power work machine 1 is assembled or vibration occurs during operation, the light emitting end surface 30a, the first starting end surface 32a, and the second starting end surface 35a can be prevented from being damaged. This can prevent the light transmittance of the first light guiding rod 32, the second light guiding rod 35, and the light emitting end surface 30a from being reduced. In addition, by ensuring the first space S1 and the second space S2, restrictions on the shape of the light source device 30 are reduced. Therefore, a general-purpose light source device 30 can be used.

[0064] 5, 9, and 10, the main housing 11 includes a motor housing 12 and a bracket 16 which are assembled together. The LED 31 is attached to the motor housing 12. The first light guiding rod 32 and the second light guiding rod 35 are attached to the bracket 16. Therefore, by assembling the motor housing 12 and the bracket 16 together, the LED 31, the first light guiding rod 32, and the second light guiding rod 35 can be positioned relative to each other without adjustment. This improves the ease of assembly of the LED 31, the first light guiding rod 32, and the second light guiding rod 35.

[0065] As shown in Fig. 5, a battery (power source) 23, wiring 25 extending from the battery 23, and an LED 31 connected to the wiring 25 are attached to the motor housing 12. No electrical components connected to the wiring 25 are provided on the bracket 16. Therefore, by gathering the electrical components including the LED 31 on the motor housing 12 side, it is not necessary to provide the wiring 25 on the bracket 16. For this reason, first, the electrical components including the LED 31 and the wiring 25 are assembled to the motor housing 12, and the first light guiding rod 32 and the second light guiding rod 35 are assembled to the bracket 16. After that, the motor housing 12 and the bracket 16 are assembled to each other. This improves the ease of assembly of the main housing 11.

[0066] As shown in Figs. 4 and 5, the power working machine 1 has an electric motor 20 housed in a main body housing 11. The power working machine 1 has an output shaft 20a extending from the electric motor 20. The power working machine 1 has a cooling fan 21 that rotates by the output shaft 20a and generates air to cool the electric motor 20. An LED 31 is disposed between the electric motor 20 and the cooling fan 21 and within the main body housing 11. Therefore, the LED 31 is housed in the empty space between the electric motor 20 and the cooling fan 21, and is disposed closer to the battery 23 electrically connected to the electric motor 20 than the cooling fan 21. Therefore, it is possible to prevent the wiring 25 for supplying power to the LED 31 from being disposed near the cooling fan 21. This makes it possible to prevent the main body housing 11 from becoming larger around the cooling fan 21.

[0067] As shown in FIGS. 5, 6, 9, and 10, a groove 12f extending beyond the cooling fan 21 is provided on the inner peripheral surface 16c of the main housing 11 facing the cooling fan 21. The first light guiding rod 32 and the second light guiding rod 35 are inserted into the groove 12f. This allows the first light guiding rod 32 and the second light guiding rod 35 to be disposed across the radially outer side of the cooling fan 21 while preventing the main housing 11 from becoming larger. In addition, the groove 12f allows the positioning of the region close to the first starting end surface 32a of the first light guiding rod 32 and the region close to the second starting end surface 35a of the second light guiding rod 35. This allows the ease of assembly of the first light guiding rod 32 and the second light guiding rod 35 to be improved.

[0068] As shown in Figs. 8 and 11, the first start end face 32a of the first light guiding rod 32 and the second start end face 35a of the second light guiding rod 35 are adjacent to each other and located on the same virtual plane or parallel to each other. The first end face 32c of the first light guiding rod 32 and the second end face 35c of the second light guiding rod 35 are spaced apart from each other. Therefore, the first start end face 32a and the second start end face 35a can be arranged together near the LED 31 provided at one location. Therefore, the periphery of the LED 31 can be made compact. In addition, by spacing the first end face 32c and the second end face 35c from each other, it is possible to suppress the occurrence of shadows in the irradiation area. Therefore, it is possible to improve the visibility of the irradiation area.

[0069] As shown in Figs. 8 and 11, the first start end 32b of the first light guiding rod 32 including the first start end surface 32a and the second start end 35b of the second light guiding rod 35 including the second start end surface 35a are joined together side by side. This reduces the number of parts, and therefore the number of dies for forming the first light guiding rod 32 and the second light guiding rod 35 can be reduced. This reduces manufacturing costs. In addition, this reduces the effort required to adjust the relative positions of the first light guiding rod 32 and the second light guiding rod 35 during assembly. This improves the ease of assembly of the first light guiding rod 32 and the second light guiding rod 35.

[0070] 8 and 11, the first light guiding rod 32 and the second light guiding rod 35 are formed of a single material with a light transmittance of 80% or more per mm. Therefore, due to the high light transmittance, it is possible to suppress the loss of light from the first starting end face 32a to the first end face 32c of the first light guiding rod 32 and from the second starting end face 35a to the second end face 35c of the second light guiding rod 35. Moreover, by forming them from a single material, it is possible to suppress manufacturing costs, and since it is easy to simulate the light path, it is easy to respond to design changes.

[0071] As shown in FIG. 10, the power working machine 1 has a light source 31 housed in the main housing 11. The power working machine 1 has a first light guide rod 32 that has a first start end surface 32a facing the light source 31 and guides light incident from the first start end surface 32a to a first end surface 32c and irradiates the light from the first end surface 32c. The main housing 11 is cylindrical to house the electric motor 20 and includes a motor housing 12 and a bracket 16 that are assembled together. The first light guide rod 32 is columnar over its entire length and includes a curved portion 33 that is at least partially curved. The curved portion 33 of the first light guide rod 32 extends in the circumferential direction along the inner peripheral surface 16c of the main housing 11. The light source 31 is attached to the motor housing 12, and the first light guide rod 32 is attached to the bracket 16. A first space S1 is provided between a light emitting end surface 30a of a light source device 30 including a light source 31 and a first starting end surface 32a of a first light guiding rod 32 (see FIG. 11).

[0072] Therefore, the light emitted from the light source 31 directly enters the first light guide rod 32 from the first starting end surface 32a and is sent to the first end surface 32c through the first light guide rod 32 that does not branch. Therefore, the loss of the amount of light from the first starting end surface 32a to the first end surface 32c can be suppressed. By providing the curved portion 33, the arrangement and orientation of the first starting end surface 32a and the first end surface 32c can be freely changed without increasing the size of the first light guide rod 32. By aligning the curved portion 33 with the inner peripheral surface 16c, the first light guide rod 32 can be accommodated in the main body housing 11 while suppressing the increase in size of the main body housing 11. By assembling the motor housing 12 and the bracket 16 to each other, the light source 31 and the first light guide rod 32 can be positioned relative to each other without adjustment. Therefore, the assembling ability of the light source 31 and the first light guide rod 32 can be improved. By providing the first space S1, it is possible to prevent the light emitting end surface 30a and the first end surface 32a from being damaged when the power working machine 1 is assembled or vibrated during operation. This makes it possible to prevent the light transmittance of the first light guiding rod 32 and the light emitting end surface 30a from being reduced. In addition, by providing the first space S1, there are fewer restrictions on the shape of the light source device 30. Therefore, a general-purpose light source device 30 can be used.

[0073] Next, a second embodiment of the present disclosure will be described with reference to Figures 13 and 14. A power working machine 40 of the second embodiment has a first light guiding rod 41 and a second light guiding rod 44 shown in Figures 13 and 14, instead of the first light guiding rod 32 and the second light guiding rod 35 of the first embodiment shown in Figure 8. In the following description, only the configuration different from the first embodiment will be described in detail.

[0074] The first light guiding rod 41 and the second light guiding rod 44 shown in Figs. 13 and 14 are formed of a single material, acrylic, which is colorless and has high light transmittance. The light transmittance per mm of the first light guiding rod 41 and the second light guiding rod 44 is 80% or more, more preferably 85% or more, 90% or more, or 95% or more. The total length of the first light guiding rod 41 is, for example, 20 mm or more, 30 mm or more, 40 mm or more, 50 mm or more, or 60 mm or more. The total length of the second light guiding rod 44 is, for example, 20 mm or more, 30 mm or more, 40 mm or more, 50 mm or more, or 60 mm or more. The second light guiding rod 44 is provided longer than the first light guiding rod 41.

[0075] As shown in FIGS. 13 and 14, the first light guiding rod 41 is configured in a similar manner to the first light guiding rod 32 (see FIG. 8). The first light guiding rod 41 has a first starting end face 41a and a first end face 41c, which are planar and substantially circular, at both ends. The first starting end face 41a faces upward, and the first end face 41c faces downward. Between the first starting end face 41a and the first end face 41c, a first starting end face 41b, a third curved portion 42c, a first curved portion 42a, and a second curved portion 42b are provided in this order from the first starting end face 41a. The first curved portion 42a, the second curved portion 42b, and the third curved portion 42c correspond to the curved portion 42 in the first light guiding rod 41, which is curved.

[0076] As shown in Figs. 13 and 14, the first starting end 41b extends a predetermined distance substantially perpendicularly from the first starting end surface 41a. The third curved portion 42c curves leftward from a substantially vertical direction to a horizontal direction. The first curved portion 42a curves along the imaginary plane H and follows the inner peripheral surface 16c of the bracket 16 (see Figs. 11 and 12). The first curved portion 42a extends counterclockwise over a length of approximately one-sixth of the circumference of the inner peripheral surface 16c (angle range of approximately 60°). The second curved portion 42b curves from a horizontal direction to a substantially vertical direction.

[0077] 13 and 14, the first light guiding rod 41 has a mounting seat 43 that is integrally formed from the same material. The mounting seat 43 is provided on a side surface 42d (inner peripheral curved portion 42f) of the first curved portion 42a that is spaced from the outer peripheral curved surface 42e of the first curved portion 42a. The mounting seat 43 is formed in a plate shape that extends radially inward from the side surface 42d. A circular through hole 43a that penetrates in the up-down direction is formed in the center of the mounting seat 43.

[0078] As shown in FIGS. 13 and 14, the second light guiding rod 44 is provided to the right of the first light guiding rod 41 and is configured in a manner similar to the second light guiding rod 35 (see FIG. 8). The second light guiding rod 44 has a second starting end surface 44a and a second end surface 44c, which are planar and substantially circular, at both ends. The second starting end surface 44a faces upward, and the second end surface 44c faces downward. Between the second starting end surface 44a and the second end surface 44c, the second starting end surface 44b, the third curved portion 45c, the first curved portion 45a, and the second curved portion 45b are provided in this order from the second starting end surface 44a. The first curved portion 45a, the second curved portion 45b, and the third curved portion 45c correspond to the curved portion 45 in the second light guiding rod 44, which is curved.

[0079] As shown in Figs. 13 and 14, the second starting end 44b extends a predetermined distance substantially perpendicularly from the second starting end surface 44a. The third curved portion 45c curves to the right from a substantially vertical direction to a horizontal direction. The first curved portion 45a curves along the imaginary plane H and follows the inner peripheral surface 16c of the bracket 16 (see Figs. 11 and 12). The first curved portion 45a extends in the counterclockwise direction for a length of approximately one-third of the circumference of the inner peripheral surface 16c (angle range of approximately 120°). The second curved portion 45b curves from the horizontal direction to a substantially vertical direction.

[0080] 13 and 14, the second light guiding rod 44 has a mounting seat 46 that is integrally formed from the same material. The mounting seat 46 is provided on a side surface 45d (inner peripheral curved portion 45f) of the first curved portion 45a that is spaced from the outer peripheral curved surface 45e of the first curved portion 45a. The mounting seat 46 is formed in a plate shape that extends radially inward from the side surface 45d. A circular through hole 46a that penetrates the mounting seat 46 in the vertical direction is formed in the center of the mounting seat 46.

[0081] As shown in Figs. 13 and 14, the first end 41b of the first light guiding rod 41 and the second end 44b of the second light guiding rod 44 are joined together in a left-right arrangement. As a result, the first light guiding rod 41 and the second light guiding rod 44 are integrally formed as a light guiding rod joint 47. The first end face 41a and the second end face 44a are arranged adjacent to each other and facing the light emitting end face 30a (see Fig. 11) at approximately the same height. Spaces are provided between the first end face 41a and the light emitting end face 30a, and between the second end face 44a and the light emitting end face 30a. The first end face 41c is exposed downward in any one of the exhaust holes 16b provided in the left part of the bracket 16 (see Fig. 7). The second end face 44c is exposed downward in any one of the exhaust holes 16b provided in the right part of the bracket 16. The first end surface 41c is disposed forward of the second end surface 44c. With this configuration, the first light guiding rod 32 and the second light guiding rod 35 of the first embodiment can illuminate the areas around the tip cutting tool 22 and the through hole 2a of the base 2 (see FIG. 1) in a state where the positions of the bright areas are shifted.

[0082] Next, an experiment comparing the brightness of the illumination area between the first embodiment and the comparative example will be described with reference to Figs. 15 to 18. In the comparative example, a light guide rod 50 was used instead of the first light guide rod 32 and the second light guide rod 35 of the first embodiment shown in Fig. 8. The light guide rod 50 is formed of a single material that is the same as the first light guide rod 32 and the second light guide rod 35. The light guide rod 50 has a planar and substantially circular start end surface 50a at the start end side and a linearly extending start end portion 50b, and has two planar and substantially circular end surfaces 51a and 54a at the end end side. The start end surface 50a faces upward, and the end surfaces 51a and 54a face downward. The light guide rod 50 branches into a first branch portion 51 toward the end surface 51a and a second branch portion 54 toward the end surface 54a at the lower end of the start end portion 50b.

[0083] As shown in Figs. 15 and 16, the first branch portion 51 has two orthogonal portions 52, a first orthogonal portion 52a extending generally orthogonally to the left relative to the lower end of the starting portion 50b, and a second orthogonal portion 52b extending generally orthogonally downward relative to the tip of the first orthogonal portion 52a. The first orthogonal portion 52a is curved to follow the inner peripheral surface 16c of the bracket 16 (see Fig. 12) and extends in the counterclockwise direction for a length of approximately one-quarter of the circumference of the inner peripheral surface 16c (angle range of approximately 90°). A mounting seat 53 protruding radially inward and having a through hole 53a is provided on the side surface 52c of the first orthogonal portion 52a. A terminal surface 51a is provided at the lower end of the second orthogonal portion 52b. The terminal surface 51a is disposed at approximately the same position as the first terminal surface 32c shown in Fig. 7.

[0084] As shown in Figs. 15 and 16, the second branch portion 54 has two orthogonal portions 55: a first orthogonal portion 55a extending rightwardly and substantially orthogonal to the lower end of the starting portion 50b, and a second orthogonal portion 55b extending downwardly and substantially orthogonal to the tip of the first orthogonal portion 55a. The first orthogonal portion 55a is curved to follow the inner peripheral surface 16c of the bracket 16 (see Fig. 12), and extends in the clockwise direction for a length of substantially a quarter of the circumference of the inner peripheral surface 16c (angle range of substantially 90°). A mounting seat 56 protruding radially inward and having a through hole 56a is provided on the side surface 55c of the first orthogonal portion 55a. A terminal surface 54a is provided at the lower end of the second orthogonal portion 55b. The terminal surface 54a is disposed at substantially the same position as the second terminal surface 35c shown in Fig. 7.

[0085] FIG. 15 shows a schematic diagram of the path of light passing through the light guide rod 50. The light passing through the second branch 54 is omitted because it is approximately symmetrical to the first branch 51. The light emitted from the LED 31 (see FIG. 11) enters the starting end 50b from the starting end surface 50a. At the branching portion where the first branch 51 and the second branch 54 are separated, some of the light leaks out of the light guide rod 50 without being totally reflected by the wall surface of the branching portion. In addition, at the orthogonal portion where the first orthogonal portions 52a, 55a and the second orthogonal portions 52b, 55b are connected, some of the light may leak out of the light guide rod 50. Therefore, the loss of the amount of light in the path from the starting end surface 50a to the terminal end surfaces 51a, 54a is large.

[0086] FIG. 17 shows the illumination area on the lower surface side of the base 2 when the first light guide rod 32 and the second light guide rod 35 (see FIG. 11) of the first embodiment of the present disclosure are used. The light passes through both the central through hole 2a and the surrounding multiple through holes 2b to illuminate the downward direction. Therefore, the outlines of all the through holes 2a and the multiple through holes 2b are clearly visible, and the area is illuminated brightly over a wide area. FIG. 18 shows the illumination area on the lower surface side of the base 2 when the light guide rod 50 of the comparative example is used. The light passes through the central through hole 2a and some of the multiple through holes 2b to illuminate the downward direction. Only some of the outlines of the through hole 2a and the multiple through holes 2b can be confirmed, and the entire outlines of the through holes 2a and the through holes 2b cannot be seen, and only some of the outlines remain. Therefore, the illumination area is narrow and the amount of light is small. 17 and 18, it can be seen that there is a large difference in the amount of light between the light that has passed through the first light guiding rod 32 and the second light guiding rod 35 and the light that has passed through the light guiding rod 50.

[0087] Various modifications can be made to the above-described embodiment of the present disclosure. A power tool 1 called a router is exemplified. Alternatively, the present invention may be applied to power tools such as trimmers, screwdrivers, electric drills, and reciprocating saws, air tools such as compressed air nailers, and gardening tools such as lawnmowers. Although the present invention has been exemplified with two light guide rods, the first light guide rod 32 and the second light guide rod 35, three or more light guide rods may be provided. The present invention has been exemplified with two LEDs in the light source device 30. Alternatively, the light source device 30 may be provided with only one LED or three or more LEDs.

[0088] The first light guiding rod 32 and the second light guiding rod 35 are shown as being made of acrylic, which has a high light transmittance. Instead of this, they may be made of other resin materials with high light transmittance, such as polycarbonate and polystyrene, or may be made of non-resin materials with high light transmittance. The cross-sectional shapes of the start and end faces and middle parts of the first light guiding rod 32 and the second light guiding rod 35 may be, for example, elliptical or oval, instead of the approximately circular shapes shown as examples.

[0089] The first light guiding rod 32 and the second light guiding rod 35 are exemplified in which the first starting end surface 32a and the second starting end surface 35a face upward, and the third curved portions 33c, 36c are curved from the vertical extension direction to the horizontal direction. Alternatively, for example, the first starting end surface 32a and the second starting end surface 35a may face outward on an imaginary plane H shown in Fig. 11, and the third curved portions 33c, 36c may be curved in the horizontal direction on the imaginary plane H. In the case of such a configuration, the light source device 30 is located outward of the first starting end surface 32a and the second starting end surface 35a on the imaginary plane H.

[0090] The first light guiding rod 32 and the second light guiding rod 35 are exemplified such that the starting end faces and the end faces are provided in a flat shape. Alternatively, for example, the starting end faces or the end faces, or both, may be provided as convex lens surfaces or concave lens surfaces. The first light guiding rod 32 and the second light guiding rod 35 are fixed to the bracket 16 by press-fitting the boss portion 16e of the bracket 16 into the through holes 34a, 37a of the mounting seats 34, 37. Alternatively, the first light guiding rod 32 and the second light guiding rod 35 may be fixed to the bracket 16 by, for example, screw fastening. [Explanation of symbols]

[0091] 1...Power working machine (first embodiment) 2...base, 2a, 2b...through holes 3...Main body support portion, 3a...Base connection portion, 3b...Cylindrical portion, 3c...Window portion 3d: Grip support, 3e: Window 4…Lock lever 5…Height adjustment dial, 5a…Spiral convex part 6: grip, 6a: arm portion, 6b: holding portion 10...Tool body 11...Main body housing 12...motor housing (first housing), 12a...left half portion, 12b...right half portion 12c: air intake hole, 12d: light source housing, 12e: notch, 12f: groove 12g...Left and right connecting part, 12h...Concave part, 12i...Cylindrical part, 12j...Bulging part 13...switch panel, 13a...standby switch, 13b...lock-on switch 14...Speed ​​dial 15…Battery mounting section 16... bracket (second housing), 16a... through hole, 16b... exhaust hole 16c: inner peripheral surface; 16d: spiral recess; 16e: boss portion; 16f: recess 17...Flange 20...electric motor, 20a...output shaft, 20b...rotor, 20c...stator 20d, 20e... bearings, 20f... sensor board 21…Cooling fan 22...Cutting tool 23…Battery 24…Controller 25…Wiring 30...light source device, 30a...light emitting end surface, 30b...engagement protrusion, 30c...wiring connection portion 31...LED (light source) 32...first light guide rod, 32a...first starting end surface, 32b...first starting end section, 32c...first terminal end surface 33...curved portion, 33a...first curved portion, 33b...second curved portion, 33c...third curved portion 33d: side surface, 33e: outer circumferential curved surface, 33f: inner circumferential curved surface 34...mounting seat, 34a...through hole 35...Second light guide rod, 35a...Second start end surface, 35b...Second start end, 35c...Second end surface 36...curved portion, 36a...first curved portion, 36b...second curved portion, 36c...third curved portion 36d...side surface, 36e...outer curved surface, 36f...inner curved surface 37...mounting seat, 37a...through hole 38...Light guide rod connection body 40...Power working machine (second embodiment) 41...First light guide rod, 41a...First start end surface, 41b...First start end portion, 41c...First end surface 42...curved portion, 42a...first curved portion, 42b...second curved portion, 42c...third curved portion 42d...side surface, 42e...outer curved surface, 42f...inner curved surface 43...mounting seat, 43a...through hole 44...Second light guide rod, 44a...Second start end surface, 44b...Second start end, 44c...Second end surface 45...curved portion, 45a...first curved portion, 45b...second curved portion, 45c...third curved portion 45d...side surface, 45e...outer curved surface, 45f...inner curved surface 46...mounting seat, 46a...through hole 47...Light guide rod connection body 50...Light guide rod, 50a...Starting end surface, 50b...Starting end 51: first branch portion, 51a: terminal end surface 52...orthogonal portion, 52a...first orthogonal portion, 52b...second orthogonal portion, 52c...side surface 53...mounting seat, 53a...through hole 54... second branch portion, 54a... terminal surface 55...orthogonal portion, 55a...first orthogonal portion, 55b...second orthogonal portion, 55c...side surface 56...mounting seat, 56a...through hole W…Work material J: Motor axis H: Virtual plane S1: First space, S2: Second space

Claims

1. A power working machine, a light source accommodated in a main body housing; A first light guiding rod having a first end surface facing the light source and guiding light incident from the first end surface to a first end surface to irradiate the light from the first end surface; A power working machine having a second light guiding rod that has a second starting end surface facing the light source and that guides light incident from the second starting end surface to a second terminal end surface and irradiates the light from the second terminal end surface.

2. The power working machine according to claim 1, At least one of the first light guiding rod and the second light guiding rod is columnar over its entire length and includes a curved portion that is at least partially curved.

3. The power working machine according to claim 2, The main body housing is cylindrical so as to accommodate the electric motor, A power working machine, wherein the curved portion of the first light guiding rod or the second light guiding rod extends circumferentially along the inner circumferential surface of the main body housing.

4. The power working machine according to claim 2 or 3, an electric motor accommodated in the main body housing; A power work machine, wherein the curved portion of the first light guiding rod or the second light guiding rod includes a first curved portion that curves along an imaginary plane perpendicular to the motor axis of the electric motor, and a second curved portion that curves from the imaginary plane in a direction along the motor axis.

5. A power working machine according to claim 2 or 3, the first light guide rod or the second light guide rod has a mounting seat to be attached to the main body housing, The mounting seat is provided on a side surface of the curved portion spaced apart from an outer circumferential curved surface of the curved portion.

6. A power working machine as described in claim 1, a first space is provided between a light emitting end surface of a light source device including the light source and the first start end surface of the first light guiding rod; A power working machine in which a second space is provided between the light emitting end surface of the light source device and the second starting end surface of the second light guiding rod.

7. A power working machine as described in claim 1, The main body housing includes a first housing and a second housing that are assembled together, The light source is attached to the first housing, and the first light guide rod and the second light guide rod are attached to the second housing.

8. The power working machine according to claim 7, a power source, a wiring extending from the power source, and the light source connected to the wiring are attached to the first housing; The second housing does not include any electrical components connected to the wiring.

9. A power working machine as described in claim 1, an electric motor accommodated in the main body housing; an output shaft extending from the electric motor; a cooling fan that is rotated by the output shaft to generate air for cooling the electric motor; The power working machine has the light source disposed between the electric motor and the cooling fan and within the main body housing.

10. The power working machine according to claim 9, A groove extending beyond the cooling fan is provided on the inner surface of the main body housing facing the cooling fan, and the first light guiding rod and / or the second light guiding rod are inserted into the groove.

11. A power working machine as described in claim 1, The first start end surface of the first light guiding rod and the second start end surface of the second light guiding rod are adjacent to each other and are located on the same virtual plane or parallel to each other; A power working machine, wherein the first end surface of the first light guiding rod and the second end surface of the second light guiding rod are spaced apart from each other.

12. The power working machine according to claim 11, A power working machine in which a first starting end portion of the first light guiding rod including the first starting end surface and a second starting end portion of the second light guiding rod including the second starting end surface are integrally connected side by side.

13. A power working machine as described in claim 1, The first light guiding rod and the second light guiding rod are formed from a single material having a light transmittance of 80% or more per mm in a power working machine.

14. A power working machine, a light source accommodated in a main body housing; a first light guiding rod having a first end surface facing the light source and guiding light incident from the first end surface to a first end surface, and irradiating the light from the first end surface; The main body housing is cylindrical so as to accommodate the electric motor, and includes a first housing and a second housing that are assembled together; the first light guiding rod is columnar over its entire length and includes a curved portion that is at least partially curved; the curved portion of the first light guiding rod extends in a circumferential direction along an inner circumferential surface of the main body housing, the light source is attached to the first housing, and the first light guide rod is attached to the second housing; A power working machine, wherein a first space is provided between a light emitting end surface of a light source device including the light source and the first starting end surface of the first light guiding rod.

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