JP4126302B2 - Portable power tools - Google Patents

Description

  The present invention relates to a portable electric tool having a lighting device and good operability.

  For this cutting operation of the portable round, a method of cutting with the guide 16 in contact with the side surface of the material to be cut 15 as shown in FIG. 5, or a black line 17 on the material to be cut 15 as shown in FIG. There are methods such as drawing and cutting the black line 17. In the former case, after adjusting the cutting edge 4a of the saw blade 4 to the cutting position of the material 15 to be cut, the guide 16 is adjusted and brought into contact with the side surface of the material 15 for cutting. Cuts while aligning the cutting edge 4 a with the black line 17.

  As described above, accurate cutting cannot be performed unless the position of the blade edge 4a of the saw blade 4 is always recognized during the cutting operation, and it is important that the blade edge has good visibility. Japanese Utility Model Laid-Open No. 60-98602 describes a circular saw in which a lighting device is provided on a protective cover covering the saw blade to improve the visibility of the blade edge.

Japanese Utility Model Publication No. 60-98602

  The circular saw described in Japanese Utility Model Laid-Open No. 60-98602 has a configuration in which a lighting device is provided in the vicinity of the edge of the protective cover and a transparent window is provided in the protective cover to illuminate the edge of the saw blade. It is designed to make it easier to check the blade edge even in dark places, but when cutting, chips scatter inside the protective cover and attach to the inner wall of the transparent window. There was a drawback that it was difficult to do. In addition, since the protective cover is provided with a lighting device, when the storage battery, which is the drive source of the electric motor, is used as the power source, wiring to the housing in which the storage battery is stored is required, and the assembly is remarkably bad and the cover covers the wiring. Etc. are also required, resulting in an expensive structure.

  The objective of this invention is providing the portable electric tool which can eliminate the above-mentioned fault and can aim at the improvement of visibility, assembly property, and operativity.

  A feature of the present invention is that a housing incorporating an electric motor, a saw blade that is driven by the motor to cut a material to be cut, a protective cover that covers the saw blade, and a drive switch that controls driving of the motor are provided. In the portable electric tool having a storage battery as a drive source of the electric motor, an illuminating device is provided that can illuminate the blade edge of the saw blade using the storage battery as a power source. And turned off in conjunction with the drive switch being turned off.

  Another feature of the present invention is a portable electric tool having a housing with a built-in electric motor, a tool driven by the electric motor, a storage battery as a driving source of the electric motor, and an illumination device that illuminates a work location. Then, the storage battery is used as a power source, and is turned on before the electric motor is driven and turned off in conjunction with the drive switch being turned off.

  According to the present invention, the illuminating device is turned on before the work starts to illuminate the work location, so that the operability can be improved. In addition, since the lighting device is turned off in conjunction with the driving switch being turned off, it is possible to prevent the storage battery from being wasted due to forgetting to turn off the lighting device after the work is completed. Moreover, the assembly property can be improved by positioning the electric wire connecting the storage battery and the lighting device in the housing. In addition, the operability can be further improved by adopting a configuration in which the lighting device is kept on while the electric motor is driven.

  One embodiment of the portable circle of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing one embodiment of the portable round of the present invention, and FIG. 2 is an enlarged cross-sectional view of the main part of FIG. The housing 1 is provided with a hinge portion 1 a connected to the base 2 so as to protrude forward from the cutting edge 4 a of the circular saw 4. As shown in the figure, the hinge unit 1a is provided with an illumination device 3, and the illumination device 3 illuminates the cutting edge 4a of the saw blade 4 from the lateral direction. As shown in FIG. 2, the illuminating device 3 includes an electric wire 5, a socket 6 having connection terminals, a light bulb 7, and a transparent cover 8 that covers the light bulb 7. As shown in the drawing, the electric wire 5 of the lighting device 3 is located in the housing 1 and is connected to a storage battery that is a drive source of an electric motor (not shown).

  Since the chips generated at the time of cutting are scattered in the cutting direction of the saw blade 4, the blade edge 4 a is illuminated from the direction perpendicular to the cutting direction of the saw blade 4 as described above. 4a does not become difficult to confirm, and chips do not adhere to the transparent cover 8 of the lighting device 3, so that the visibility of the blade edge 4a can be improved. Further, since the electric wire 5 that connects the lighting device 3 to the storage battery that is the driving source of the portable circle is located in the housing 1, it is not necessary to use an electric wire cover or the like, and it can be constructed at low cost and assembled. Can be improved.

  3 and 4 show another embodiment of the portable circle of the present invention. The portable circular saw shown in the drawing devises the configuration of the lighting device 3, and the configuration other than the lighting device 3 and the hinge portion 1a of the housing 1 is the same as that of the above-described embodiment, so that the description thereof is omitted. As shown in the figure, a bent tube 9 is provided in the hinge portion 1 a of the housing 1, and an illumination device 3 is attached to an end of the bent tube 9. In the embodiment shown in FIG. 1, there is a drawback that the hinge portion 1a is separated from the blade edge 4a when the cutting depth is changed. However, as described above, the illumination device 3 is configured to be movable. Can be eliminated, and the visibility of the cutting edge can be further improved.

  In addition, it is conceivable that a switch for connecting and shutting off the lighting device 3 and the storage battery as a driving source, that is, for controlling on / off of the lighting device 3 is provided in the hinge portion 1a and can be operated from the outside.

  In addition, it is conceivable to provide a switch that opens and closes when the safety lever 11 that is an off-lock mechanism of the drive switch 10 operates to connect and disconnect the lighting device 3 and the storage battery. In this case, before starting the cutting operation Since the lighting device 3 is reliably turned on, the operability is improved.

  Furthermore, when a switch that opens and closes when the safety lever 11 is operated and a switch that can be operated from the outside is provided in the main body 1, the operability can be improved and the lighting device 3 is turned on only when necessary. Will be able to. It is desirable that the safety lever 11 described above is configured to continue to be turned on without applying a load if the drive switch 10 is turned on, and to be turned off in conjunction with the drive switch 10 being turned off.

The perspective view which shows this one Example of this invention portable round. The principal part expanded sectional view of FIG. The perspective view which shows the other Example of this invention portable round. The principal part expanded sectional view of FIG. The perspective view which shows an example of this cutting work state of the conventional portable round. The perspective view which shows an example of this cutting work state of the conventional portable round.

Explanation of symbols

1 is a housing, 1a is a hinge portion, 3 is a lighting device, 4 is a saw blade, 4a is a blade edge portion, 8 is a transparent cover, and 11 is a safety lever.

Claims (3)

  A housing incorporating an electric motor; a saw blade driven by the motor to cut a workpiece; a protective cover covering the saw blade; a drive switch for controlling the driving of the motor; and a drive source of the motor A portable power tool having a storage battery is provided with an illumination device that can illuminate the blade edge of the saw blade using the storage battery as a power source, and the illumination device is a safety lever that is an off-lock mechanism of the drive switch The portable electric tool is turned on before the electric motor is driven and is turned off in conjunction with the driving switch being turned off.   2. The portable power tool according to claim 1, wherein the lighting device can illuminate the blade edge of the saw blade from a direction perpendicular to the cutting direction of the saw blade.   The portable electric tool according to claim 1 or 2, wherein an electric wire connecting the storage battery and the lighting device is positioned in the housing.

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