JP4936220B2 - Electric tool - Google Patents

Description

  The present invention relates to a power tool, and more particularly to a power tool such as a portable circular saw provided with a lighting device.

  2. Description of the Related Art Conventionally, there is a portable circular saw that is an electric tool that can carry a cutting machine for cutting and processing a processing member such as wood. Portable circular saws are mainly composed of a circular saw blade and a motor as a driving device, and are excellent in portability. Therefore, they are frequently used not only in factories but also in construction sites.

As shown in FIG. 8, the cutting member cutting method using the portable circular saw is a circular saw blade serving as a cutting blade of the portable circular saw 101 on the black line 103 </ b> A drawn on the processing member 103. There are a method of cutting together 121 and a method of cutting the guide 259 provided on the portable circular saw 201 as shown in FIG. In the former case, cutting is performed while aligning the cutting edge of the circular saw blade 121 with the black line 103A. In the latter case, after aligning the cutting edge of the circular saw blade 221 as a cutting blade with the cut position of the processing member, the guide 259 is adjusted, the guide 259 is brought into contact with the side surface of the processing member, and cutting is performed. In such a cutting operation, accurate cutting cannot be performed unless the positions of the blade edges of the circular saw blades 121 and 221 are visually recognized, and the visibility of the blade edges of the circular saw blades 121 and 221 must be improved. was there. Therefore, as disclosed in Patent Document 1 and Patent Document 2, the applicant discloses a portable circular saw that is provided with a lighting device to illuminate the blade edge of the circular saw blade.
JP-A-11-170203 JP 2002-210703 A

  Since the portable circular saws shown in Patent Document 1 and Patent Document 2 are provided with a lighting device, the black line and the circular saw drawn on the processing member even at a site where the amount of light is insufficient. It is possible to visually recognize the cutting edge of the blade. However, since the direction of illumination by the illumination device is only one direction, the circular saw blade is shaded by illumination, and as a result, the black line may be difficult to see.

  For this reason, in order to eliminate the shadow of the circular saw blade, a configuration in which an illuminating device is provided in front of the cutting direction can be considered. The light will not reach the cutting edge.

  Moreover, the structure which arrange | positions an illuminating device on the both sides | surfaces of a circular saw blade can be considered. However, in this case, for example, the saw cover that covers the circular saw blade can be divided into a first saw cover portion located on one side of the cutting blade and a second saw cover portion located on the other side of the cutting blade, In the case where the second saw cover part is configured to be detachable from the first saw cover part, since the lighting device protrudes from the second saw cover when the second saw cover is attached to and detached from the first saw cover part, the lighting device is provided. There is a problem that it interferes with the attachment and detachment of the saw cover.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electric tool that improves the visibility of the position of a machining tool relative to a machining member, reduces the size and space, and improves the cutting work efficiency.

In order to solve the above problems, the present invention provides a power source, a cutting blade driven by the power source to process a machining member, a tool cover portion that covers at least a part of the peripheral edge of the cutting blade , a light source, Illuminating a part of the peripheral edge of the cutting blade disposed at a position away from the light source, and emitting light disposed on the other side of the cutting blade with respect to one side of the cutting blade on which the power source is disposed And a transmission means that is supported and connected to the tool cover portion and transmits light of the light source to the light emitting portion, the tool cover portion being a first located mainly on one side of the cutting blade. The saw cover part and at least a second saw cover part located on the other side of the cutting blade can be divided into at least two parts, and the second saw cover part can be attached to and detached from the first saw cover part. The light source is disposed at a portion, and the second saw cover portion It provides a power tool light emitting portion is disposed.

A light emitting unit that is disposed at a position spaced from the light source and illuminates a part of the peripheral edge of the cutting blade , and a transmission unit that is supported and connected to the tool cover unit and transmits light from the light source to the light emitting unit. In addition, it is not necessary to provide a light source in the part of the tool cover part where the light emitting part is provided, the part of the tool cover part can be reduced in size, and the entire power tool can be reduced in size. In addition, since the processing tool consists of a cutting blade, the power source is arranged on one side of the cutting blade, and the light emitting part is arranged on the other side of the cutting blade, a power source for driving the power source is usually provided. Illumination can be performed with light from the light emitting portion on the other side opposite to the one side of the cutting blade. The tool cover portion can be divided at least into a first saw cover portion located mainly on one side of the cutting blade and a second saw cover portion located mainly on the other side of the cutting blade. The second saw cover portion is Since the light source is arranged on the first saw cover part and the light emitting part is arranged on the second saw cover part, the light source and the light source are connected to the removable second saw cover part. It is not necessary to provide an electric wire or the like for supplying the first saw cover portion, and the first saw cover portion can be easily attached to and detached from the second saw cover portion.

Further, the light emitting unit is closed and the first light emitting portion and the second light emitting section, the first light emitting portion is disposed in the first saw cover portion and the second light emitting portion is disposed in the second saw cover portion Preferably it is.

  The light emitting part has a first light emitting part and a second light emitting part, and the tool cover part is a first saw cover part mainly located on one side of the cutting blade and a second saw cover mainly located on the other side of the cutting blade. The second saw cover part is detachable from the first saw cover part, the light source is arranged on the first saw cover part, the first light emitting part is arranged on the first saw cover part, Since the second light emitting unit is arranged in the second saw cover unit, even if only one light source is used, the light emitting unit may be provided on the substantially one side and the other side of the cutting blade. it can.

  Moreover, it is preferable that the light source directly faces one side of the cutting blade. Since the light source directly faces one side of the cutting blade, the one side of the cutting blade can be directly illuminated by the light of the light source, and the one side of the cutting blade can be illuminated more brightly.

  Further, it is preferable that the transmission means is composed of an optical fiber, one end of the optical fiber is disposed opposite to the light source, and the other end of the optical fiber forms the light emitting unit.

  The transmission means is made of an optical fiber, and one end of the optical fiber is disposed opposite to the light source, and the other end of the optical fiber forms a light emitting part, so that the light from the light source can be efficiently and easily transmitted to the light emitting part.

  In addition, it is preferable that a notch or a through hole is formed in the tool cover part, and the optical fiber is supported and connected to the tool cover part by fitting into the notch or the through hole.

  A notch or through hole is formed in the tool cover part, and the optical fiber is supported and connected to the tool cover part by fitting into the notch or through hole, so that the optical fiber can be easily and reliably connected to the tool cover part. Can be fixed.

  As described above, the present invention can provide an electric tool that improves the visibility of the position of the processing tool relative to the processing member, achieves downsizing and space saving, and improves cutting work efficiency.

  A power tool according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the electric tool is a portable circular saw 1 called a so-called dust collection circle for cutting a gypsum board or the like as a processing member, and is connected to a dust collector (not shown), While cutting the gypsum board, dust generated by cutting the gypsum board can be collected. The portable circular saw 1 is mainly composed of a housing 2 (FIG. 3), a circular saw blade 21, a lighting device 70 (FIG. 2), and a base 50. The circular saw blade 21 corresponds to a processing tool, and the saw cover 40 corresponds to a processing cover portion.

  As shown in FIG. 3, the housing 2 is configured such that a handle portion 12 is integrally provided and a resin housing portion 10 in which a motor 11 as a power source is housed, and the motor 11 and a circular saw blade 21 are connected to drive. A speed reducer 22 as a driving system is housed, and is mainly composed of an aluminum gear cover 20 that rotatably supports the circular saw blade 21 and a second saw cover portion 30 made of a transparent resin. The accommodating portion 10, the gear cover 20, and the second saw cover portion 30 are connected in this order from the bottom to the top in FIG. When the motor 11 is driven, the rotation of the motor 11 is transmitted to the circular saw blade 21 via the speed reducer 22 so that the circular saw blade 21 rotates.

  As shown in FIG. 1, the handle portion 12 is provided with a switch 12 </ b> A that controls driving of the motor 11 and an illumination switch 12 </ b> B that controls ON / OFF of the illumination device 70. The part of the gear cover 20 connected to the second saw cover part 30, that is, the part of the gear cover 20 on the side opposite to the accommodating part 10 protects the circular saw blade 21 together with the second saw cover part 30, as shown in FIG. The first saw cover portion 23 and the second saw cover portion 30 constitute the saw cover 40. Therefore, the saw cover 40 has a two-part configuration of the first saw cover portion 23 and the second saw cover portion 30, and the saw cover 40 corresponds to a tool cover portion.

  As shown in FIG. 3, the saw cover 40 includes a lower surface of the circular saw blade 21 of FIG. 3 that is one side 21 </ b> A side of the circular saw blade 21, and an upper surface of the circular saw blade 21 of FIG. 3 that is the other side 21 </ b> B side. Covers almost half of each. More specifically, the first saw cover portion 23 mainly covers approximately half of the one side surface 21A, and the second saw cover portion 30 mainly covers substantially half of the other side surface 21B. As described above, the first saw cover portion 23 forms a part of the gear cover 20, and the gear cover 20 is connected to the accommodating portion 10 in which the motor 11 is accommodated. It will be arranged on one side 21A side.

  The second saw cover part 30 and the first saw cover part 23 are provided with engaging parts (not shown) that can be engaged with each other by being hooked to each other. It becomes removable with respect to. The second saw cover portion 30 is pulled away from the first saw cover portion 23 constituting the gear cover 20 in the direction indicated by the arrow in FIG. 5, that is, in the axial direction of the circular saw blade 21 that is the left direction in FIG. 5. As a result, the engagement portion (not shown) is disengaged and can be detached from the first saw cover portion 23. Further, the second saw cover portion 30 is approached in the opposite direction from the state in which the second saw cover portion 30 is removed, and is pressed against the first saw cover portion 23, whereby an engaging portion (not shown) is engaged. The first saw cover portion 23 can be mounted and fixed.

  In FIG. 7, the second saw cover 30 is illustrated as if it was removed upward in FIG. 7, but instead of removing in this direction, the second saw cover 30 is not shown in FIG. It is illustrated in a state shifted upward. As shown in FIG. 1 and the like, one end side of the saw cover 40 in the circumferential direction of the circular saw blade 21 is connected to a rotation support portion 52 which will be described later, and a connecting portion 25 configured integrally with the first saw cover portion 23. Eggplant. On the other end side of the saw cover 40 in the circumferential direction of the circular saw blade 21, a restricting portion 26 capable of fastening and releasing a later-described rotating plate 56 with respect to the saw cover 40 is provided. In addition, a discharge unit 24 is provided on the upper portion of the saw cover 40. The discharge unit 24 is connected to a dust collector (not shown) and discharges chips generated by cutting the processing member with the circular saw blade 21 to a dust collector (not shown). ing.

  A safety cover 27 is provided on the other end side of the saw cover 40 in the circumferential direction of the circular saw blade 21 so as to be rotatable in the circumferential direction along the outer edge of the saw cover 40. A spring (not shown) is interposed between the saw cover 40 and the safety cover 27, and the safety cover 27 is connected to the saw cover 40 from one end side to the other end side in the circumferential direction of the circular saw blade 21. It is energizing in the direction toward. Therefore, in a state where the cutting operation is not performed, the safety cover 27 covers a portion of the circular saw blade 21 that cannot be covered with the saw cover 40 from the other end side toward the one end side. Therefore, there is a portion where the circular saw blade 21 is exposed between the one end side of the saw cover 40 and the safety cover 42, and this exposed portion becomes a portion that cuts the processing member, and the other end side of the saw cover 40. The circular saw 1 is cut and advanced from one side to the other. Therefore, the direction from the other end side of the saw cover 40 toward the one end side, that is, the right direction in FIG. 1 is defined as the cutting direction, one end side of the saw cover 40 is defined as the cutting direction front side, and the other end side is defined as the cutting direction rear side.

  As shown in FIG. 2, the first saw cover portion 23 is provided with an illumination device 70. The lighting device 70 is fixed by a screw 71 at a position in front of the saw cover 40 in the cutting direction and in the vicinity of the rotation support portion 52 described later. The illumination device 70 has a resin case 72. As shown in FIG. 4 and the like, the case 72 includes a first saw cover connected to the second saw cover portion 30 from the side surface of the first saw cover portion 23, that is, from the upper surface shown in FIG. 4 of the first saw cover portion 23. It is provided over the front end in the cutting direction of the portion 23.

  In the case 72, the optical axis directions are arranged parallel to each other and parallel to the one side surface 21 </ b> A of the circular saw blade 21 at a position facing the outer peripheral edge portion on the one side surface 21 </ b> A side of the circular saw blade 21. A total of three LEDs 73, which are a pair of LEDs 73, 74 and an LED 75 whose optical axis direction is arranged toward the axial direction of the circular saw blade 21 at the extended positions of the one side surface 21 </ b> A and the other side surface 21 </ b> B of the circular saw blade 21. 75 is provided. These LEDs 73 to 75 are each connected to an electric wire 76 disposed in the case 72, and the electric wire 76 is connected to a power source (not shown) for driving the motor 11.

  In FIG. 4, the case 72 and the first saw cover portion 23 are illustrated between the pair of LEDs 73 and 74 and the outer peripheral edge portion on the one side surface 21 </ b> A side of the circular saw blade 21. However, the cross section of the case 72 and the first saw cover portion 23 is visible at the cross-sectional position shown in FIG. 4, and at a cross-sectional position different from FIG. The outer peripheral edge on the side surface 21A (FIG. 2 etc.) of the saw blade 21 is directly opposed. Therefore, it is possible to directly illuminate the outer peripheral edge of the circular saw blade 21 and the vicinity thereof with the light of the LEDs 73 and 74. Thus, since the outer peripheral edge part on the side surface 21A side of the circular saw blade 21 and the vicinity thereof can be illuminated with the direct light from the LEDs 73 and 74, it can be illuminated more brightly. The LEDs 73 to 75 correspond to light sources.

  As shown in FIG. 4, a through hole 30a and a notch 30b are formed at a position corresponding to the front end of the second saw cover portion 30 in the cutting direction and in the vicinity thereof. A pair of optical fibers 77 and 77 arranged in parallel are inserted through the through hole 30a, and the pair of optical fibers 77 and 77 are fitted into the notch 30b. Thus, the optical fiber 77 is supported and connected to the second saw cover portion 30 and is fixed so as not to protrude from the outer contour of the second saw cover portion 30. The optical fiber 77 corresponds to transmission means.

  As shown in FIG. 4, one end 77 </ b> A and 77 </ b> A of the pair of optical fibers 77 and 77 is respectively attached to the tip end portion of the LED 75 in the optical axis direction when the second saw cover portion 30 is attached to the first saw cover portion 23. The other ends 77B and 77B of the pair of optical fibers 77 and 77 are arranged so as to face each other when the second saw cover portion 30 is attached to the first saw cover portion 23 as shown in FIG. The blade 21 directly faces the outer peripheral edge on the other side 21B side. With this configuration, the light of the LED 75 enters the optical fibers 77 and 77 from one ends 77A and 77A of the pair of optical fibers 77 and 77, is transmitted in the optical fibers 77 and 77, and is transmitted from the optical fibers 77 and 77 in the other ends 77B and 77B. 77, 77 is irradiated to the outside, and mainly illuminates the outer peripheral edge portion and the vicinity thereof on the other side surface 21B side of the circular saw blade 21. The other end 77B of the optical fiber 77 is disposed at a position separated from the LED 75 which is a light source, and forms a light emitting unit.

  Since the light of the LED 75 is transmitted to the other end 77B of the optical fiber 77 as the light emitting part in the second saw cover part 30 through the optical fiber 77, the other side surface 21B of the circular saw blade 21 is connected to the other end 77B of the optical fiber 77. Illumination can be performed with light, and the visibility of the circular saw blade 21 on the other end side of the circular saw blade 21 can be enhanced. Moreover, the space saving and size reduction of the part of the second saw cover part 30 where the other end 77B of the optical fiber 77 as the light emitting part is arranged can be achieved, and the overall size of the portable circular saw 1 can be reduced. it can. In addition, since the lighting device 70 is not provided in the second saw cover part 30, it is not necessary to provide a light source and an electric wire for supplying power to the light source on the second saw cover part 30 side. The first saw cover portion 23 can be easily attached and detached.

  Moreover, since the one side 21A side and its vicinity of the circular saw blade 21 are directly illuminated by the light of the LEDs 73 and 74, the one side 21A side of the circular saw blade 21 can be illuminated more brightly. Further, since the optical fiber 77 is used as the transmission means, the light from the LED 75 can be efficiently and easily transmitted to the other end 77B of the optical fiber 77. Further, since the pair of optical fibers 77 and 77 arranged in parallel is inserted into the through hole 30a and the pair of optical fibers 77 and 77 are fitted into the notch 30b, the optical fiber 77 can be easily and reliably inserted. It can be connected and fixed to the two saw cover part 30.

  As shown in FIG. 1, the base 50 is mainly composed of a base member 51, a rotation support portion 52, a first bevel plate 54, a second bevel plate 55, and a rotation plate 56 serving as an adjustment guide. The housing 2 and the circular saw blade 21 are supported with respect to the base 50 so as to be rotatable and tiltable. The base member 51 is a main constituent member of the base 50 and is made of metal and is formed of a substantially rectangular plate material. The base member 51 is arranged so that the longitudinal direction thereof coincides with the cutting direction, and an opening (not shown) having a long hole extending in the longitudinal direction is formed on the surface thereof. The circular saw blade 21 and the safety cover 42 enter the opening (not shown) so that the circular saw blade 21 and the safety cover 27 protrude below the base member 51 as shown in FIG. The base member 51 is configured.

  As shown in FIGS. 1 and 2, the first bevel plate 54 and the rotation support portion 52 are provided in the base member 51 at a front position in the cutting direction of an opening (not shown). The first bevel plate 54 stands upright on the base member 51 so as to be oriented in a short direction substantially perpendicular to the cutting direction, that is, in a direction in which the surface of the first bevel plate 54 connects the front side and the back side of the paper surface of FIG. The first tilting shaft portion 54A extending in the cutting direction is provided. The first bevel plate 54 is formed with a long hole (not shown) having an arc shape centering on the first tilting shaft portion 54A and orthogonal to the axial direction of the first tilting shaft portion 54A.

  The rotation support part 52 is pivotally supported integrally with the first saw cover part 23 around the first tilting shaft part 54A. The rotation support portion 52 has an arm portion extending rearward in the cutting direction, and the arm portion is provided with a rotation shaft portion 52A whose axial direction is a direction orthogonal to the cutting direction. A connecting portion 25 located on the front side in the cutting direction of the saw cover 40 is pivotally supported on the rotating shaft portion 52A.

  Further, the rotation support portion 52 is provided with a screw 52 </ b> B that passes through a long hole (not shown) of the first bevel plate 54 and is screwed into a screw hole (not shown) formed in the rotation support portion 52. By tightening the screw 52B, the tilt angle of the rotation support portion 52 with respect to the first bevel plate 54 can be fixed at an arbitrary angle.

  As shown in FIGS. 1 and 2, the second bevel plate 55 and the rotation plate 56 are provided in the base member 51 at a rear position in the cutting direction of an opening (not shown). The second bevel plate 55 and the first bevel plate 54 are configured substantially symmetrically in the left-right direction in FIGS. 1 and 2 with an opening (not shown) interposed therebetween, and an arcuate elongated hole (not shown) is formed. Has been. A second tilting shaft portion (not shown) that pivotally supports the rotation plate 56 is provided on the axial extension line of the first tilting shaft portion 54A. A screw portion (not shown) is provided through a long hole (not shown). The tilt angle of the rotation plate 56 with respect to the second bevel plate 55 can be fixed at an arbitrary angle by a screw portion (not shown).

The rotating plate 56 has a plate-like substantially arc shape, and its side surface is arranged upright in parallel with the longitudinal direction of the base member 51, that is, the left-right direction in FIG. The long hole 56a is formed. As shown in FIG. 1, a scale 56B is engraved on the side surface of the rotating plate 56 at a position corresponding to the outer periphery of a substantially arc, and the position of a convex portion 28B described later of the gear cover 20 with respect to the scale 56B is read. Thus, the rotation angle of the circular saw blade 21 and the housing 2 having the rotation shaft portion 52A as the rotation shaft can be recognized.

The restricting portion 26 is provided at a portion of the first saw cover portion 23 that faces the rotating plate 56, and has a lever 28 as shown in FIG. The shaft 28A of the lever 28 passes through the arc-shaped long hole 56a. A convex portion 28B extending toward the scale 56B is provided at one end portion of the lever 28 penetrating the long hole 56a on the near side shown in FIG. 1, and the convex portion of the gear cover 20 with respect to the scale 56B. The position of 28B can be read.

  By loosening the lever 28, the circular saw blade 21, the housing part 10, the gear cover 20, and the second saw cover part 30 can be turned around the turning shaft part 52 </ b> A as the center of turning. Further, by tightening the lever 28, the lever 28, the circular saw blade 21, the accommodating portion 10, the gear cover 20, and the second saw cover portion 30 can be fixed to the rotation plate 56 so as not to rotate.

  As shown in FIG. 1, the cutting position is indicated at the frontmost cutting position on the front side in the cutting direction of the base member 51 and intersects with the virtual extension surface of the one side surface 21 </ b> A and the other side surface 21 </ b> B of the circular saw blade 21. A suggestion portion 57 is provided, and an abutting surface 51A that abuts on the processing member is defined on the surface opposite to the surface on which the first bevel plate 54 and the like of the base member 51 are provided.

  The power tool according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the present embodiment, three LEDs 73 to 75 are provided, and one of them is used to illuminate the other side surface 21B of the circular saw blade 21, but this is not a limitation. For example, one LED is provided, an optical fiber is also provided in the first saw cover part, the other end is provided as a light emitting part, and the light of the one LED is provided on one side 21A side and the other side face 21B of the circular saw blade 21 via the optical fiber. You may make it transmit to both. In this case, the light emitting portion of the first saw cover portion 23 corresponds to the first light emitting portion, and the light emitting portion of the second saw cover portion 30 corresponds to the second light emitting portion.

  Moreover, although both the one side 21A side and the other side 21B side of the circular saw blade 21 are illuminated, it is not necessary to illuminate both. For example, a light emitting part is provided only on the second saw cover part 30 and Only the other side 21B side of the blade 21 may be illuminated, or a light emitting part may be provided only on the first saw cover portion 23 so that only the one side 21A side of the circular saw blade 21 is illuminated. In addition, the position of the light emitting unit is not limited to the position of the present embodiment. For example, the light emitting unit is disposed on one side 21A and the other side 21B of the circular saw blade 21, and is formed by one light emitting unit. You may make it illuminate the side surface 21A side and the other side surface 21B side of the circular saw blade 21.

  Moreover, in this Embodiment, although the electric tool was the portable circular saw 1 called what is called a dust collection circle | round | yen, it is not limited to this. For example, the first saw cover part and the second saw cover part may be a portable circular saw in which the dust collector is not connected to the first saw cover part, or other power tools such as so-called so-called portable circular saws. It may be a jigsaw or grinder. In the case of a jigsaw, a long plate-shaped cutting blade corresponds to the processing tool, and in the case of a grinder, a disc-shaped grindstone corresponds to the processing tool.

  Further, the optical fiber 77 is supported and connected to the second saw cover part 30 through a pair of optical fibers 77 and 77 arranged in parallel to the through hole 30a formed in the second saw cover part 30, and the second saw cover part 30 The pair of optical fibers 77 and 77 are fitted into the notch 30b formed in the shape 30. However, the present invention is not limited to this, and other connection methods may be adopted.

  Further, although the optical fiber 77 is used as the transmission means, it is not limited to the optical fiber 77. Similarly, the light emitting unit is not limited to being configured by the other end 77B of the optical fiber 77, and the light source is not limited to the LEDs 73 to 75.

The left view of the electric tool by embodiment of this invention. The right view of the electric tool by embodiment of this invention. Sectional drawing of the principal part of the electric tool by embodiment of this invention. The principal part sectional drawing which shows the illuminating device of the electric tool by embodiment of this invention, and its vicinity part. The principal part front view of the electric tool by embodiment of this invention. The principal part front view of the electric tool by embodiment of this invention. The left view which shows the state which removed the 2nd saw cover part of the electric tool by embodiment of this invention. The perspective view of the conventional electric tool. The perspective view of the conventional electric tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Portable circular saw 11 ... Motor 21 ... Circular saw blade 21A ... One side 21B ... Other side 23 ... 1st saw cover part 30 ... 2nd saw cover part 30a ... through hole 30b ... notch 40 ... saw cover 70 ... illumination device 73, 74, 75 ... LED 77 ... optical fiber 77A ... one end 77B ... other end

Claims (5)

Power source,
A cutting blade that is driven by the power source to process the processing member;
A tool cover that covers at least a portion of the peripheral edge of the cutting blade ;
A light source;
A light emitting unit arranged on the other side of the cutting blade with respect to one side of the cutting blade on which the power source is arranged to illuminate a part of the peripheral edge of the cutting blade arranged at a position away from the light source When,
A transmission means supported and connected to the tool cover portion, for transmitting light from the light source to the light emitting portion ;
The tool cover part can be divided into at least two parts, a first saw cover part located mainly on one side of the cutting blade and a second saw cover part located mainly on the other side of the cutting blade. The power tool is characterized in that the part is detachable with respect to the first saw cover part, the light source is arranged on the first saw cover part, and the light emitting part is arranged on the second saw cover part . Light emitting unit is closed and the first light emitting portion and the second light emitting portion,
The first light-emitting portion is disposed in the first saw cover portion, the electric power tool of claim 1, wherein the second light emitting portion is disposed in the second saw cover portion. The electric power tool according to claim 1 or 2, wherein the light source directly faces one side of the cutting blade. Said transmission means comprises an optical fiber, one end of the optical fiber is disposed opposite to the light source, the power tool of claims 1 to 3, wherein the other end of the optical fiber is characterized by forming the light emitting portion. The the tool cover portion notch or through hole is formed, the optical fiber, according to claim 4, characterized in that is supported connected to the tool cover by engaging the notch or through hole Power tools.

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