JP2011167796A - Lighting device for power tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance flexibility in handling a light-guide member in this case although restriction regarding handling of a narrow/small and bending route is easily caused since an optical fiber is relatively hard when the optical fiber is used for the guide of the light from a light source to a light irradiation part in a lighting device mainly provided, for example, on a hand-holding power tool such as a screw fastening machine. <P>SOLUTION: In the lighting device, the light-guide member 14 for guiding the light of the light source 13 is integrally molded by a molding die making a soft acrylic resin as a material. Thereby, the machining portion can be illuminated from a plurality of portions by molding it to a branched shape on the midway while enhancing freedom degree of handling of the light-guide member 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a lighting device for a hand-held power tool, which is a cutting machine such as an electric screw tightener or a reciprocating saw, or an air tool such as a compressed air type nailing machine or a tucker.

In recent years, in order to facilitate the work in a dark place using this type of power tool, a tool provided with an illumination device has been provided. For example, an illumination device disclosed in Patent Document 1 below includes an LED as a light source in a tool body, and one end of an optical fiber as a light transmission member (light guide member) is opposed to the light source. The end (light irradiating part) is a part that is separated from the light source and is fixed toward the cutting edge of the cutting blade, for example, and according to the optical fiber remote irradiation method, the light source arrangement that is easily restricted by the attachment part As a result, the degree of freedom of the arrangement of the material increases, and the visibility can be enhanced by efficiently illuminating the processing site from the vicinity.
Further, in Patent Document 2 below, a surface light emitting member is attached to the front surface of the tool main body and in the vicinity of a processing site, and a light source is directed to the surface light emitting member. As the degree of freedom increases, it is possible to efficiently shine light on the processing site.
Thus, as a conventional lighting device for a power tool, the processing site is not directly illuminated from a site separated by a light source that is easily subject to arrangement restrictions, but the processing site is set via an optical transmission member such as the optical fiber or the surface emitting member. There has been provided a light transmission type illumination device that efficiently illuminates from a nearby site.

JP 2008-265124 A JP 2009-214239 A

However, it is necessary to further improve the conventional light transmission type illumination device. For example, to enable efficient machining operations without irradiating light from the left and right sides of the tip tool and generating shadows, a multi-site lighting system that irradiates light simultaneously or at multiple locations is realized. In such a case, it is difficult to realize the conventional light transmission member (light guide member) using an optical fiber or a surface light emitting member.
The former optical fiber is a single thin wire rod made of glass fiber, and in order to cover a plurality of locations, it is necessary to route the required number of optical fibers from the light source to the light emitting section through respective routing paths. . In the first place, since the optical fiber is glassy, it has a certain flexibility, but it is difficult to bend it at an acute angle, for example. Then it is extremely difficult.
Further, when the latter surface light emitting member is used, the occupied space becomes larger than that of the optical fiber. Therefore, it is difficult to arrange the surface light emitting members at a plurality of locations.
An object of this invention is to raise the freedom degree of the handling of the light guide member routed between the light source arrange | positioned in the site | part distant from the irradiation site | part, and several irradiation site | parts.

For this reason, this invention was set as the illuminating device of the structure described in each claim of a claim.
According to the illuminating device of claim 1, as a light guide member for guiding light emitted from the light source to the light irradiation unit, for example, a material such as a soft acrylic resin is molded by a molding die. What was shape | molded in the shape where the light irradiation part side branched into multiple pieces is used. Since the resin is used as a material, the light guide member is softer than existing optical fibers and has a high degree of freedom in handling, and can be routed in and around the tool body with the same degree of freedom as electrical wiring.
In addition, the light guide member has a feature that is greatly different from that of the optical fiber in that the light guide member is formed into a shape that branches in the middle. Furthermore, the light guide member can be formed into a shape whose cross-sectional shape changes for a part of its routing path. Changing the cross-sectional shape includes changing the thickness continuously or discontinuously, branching into multiple parts on the way as described above, and fixing the routing route to the tool body side, etc. For example, forming a fixing part (attachment part) for performing the above, or providing a lens part for diffusing and irradiating light with the light irradiation part.
Since the light irradiating part side of the light guide member is branched into a plurality of parts, a single light source can illuminate the periphery of the processing part from a plurality of directions, so that no shadow is generated on the processing part, thereby processing The visibility of a part can be improved and, as a result, work efficiency can be improved.
Thus, since the light guide member is formed into a shape branched into a plurality of parts from the middle, it is easier to narrow the inside of the tool body part than a configuration in which a plurality of optical fibers are bundled and the inside of the tool body part is routed. Space can be managed efficiently, and it has higher flexibility than optical fiber by using soft acrylic resin as a raw material, which allows bending inside and outside of the tool body at a tighter angle for efficient handling. Can do.
Moreover, since the light guide member can be made highly flexible by being molded using a resin such as a soft acrylic resin, a narrow path can be easily routed around the tool body. A distance longer than that of an optical fiber can be efficiently handled. Because of this ease of handling, the light source is placed at a position far from the light irradiation (for example, at the rear of the tool body) and closer to the power supply or power supply circuit, and the lead wire (electrical wiring) between them is made as short as possible. can do.
According to the illuminating device of claim 2, since the distal end side of the light guide member is branched and the processed part can be brightly illuminated from a plurality of directions, the processed part is visually recognized without causing a shadow. It is possible to further improve the properties.

According to the illumination device of claim 3, since the light guide member is formed using a soft acrylic resin as a material, the light guide member is formed on the inner surface of the tool main body by, for example, a so-called two-color molding method. The members can be formed integrally. Since the light guide member is formed integrally with the housing of the tool main body portion, it is possible to save the trouble of handling in the assembly operation of the illumination device. Not only the resin housing but also the light guide member can be integrally formed on the inner surface of the metal housing.
According to the illuminating device of claim 4, light leakage in the middle of the routing path from the light source to the light irradiation unit is reduced to increase the light transmittance of the light guide member, thereby increasing the light amount of the light irradiation unit. Can be made. The plating treatment may be applied to the surface of the light guide member, or may be applied to the holding portion (for example, the inner surface of the holding groove portion) on the tool main body side that holds the light guide member.
According to the illuminating device of the fifth aspect, since the processed part is brightly illuminated from a plurality of directions and no shadow is generated on the processed part, the visibility can be improved, and the work efficiency can be improved.
According to the illumination device according to claim 6, for example, the unbranched light source side range is integrally formed on the inner surface of the housing of the tool body, and the branched region on the light irradiation unit side is drawn out of the housing for management. Thus, efficient handling can be realized while improving the appearance of the light guide member.
According to the illumination device of claim 7, the light guide member is branched into a plurality of parts from the middle thereof, the lens part for diffusing and irradiating light is formed at the tip, or the attachment part to the tool body is formed. It becomes possible to do. This point optical fiber is a wire material whose cross-sectional shape does not substantially change, and it is difficult to change the cross-sectional shape by branching or integrally providing a mounting portion for another part. Since the light guide member in the lighting device according to claim 7 is obtained by molding a resin such as a soft acrylic resin with a molding die or the like as a raw material, an arbitrary cross-sectional shape changing portion can be set.
According to the illumination device of the eighth aspect, since the light is diffused and irradiated by the lens portion provided as the cross-sectional shape changing portion, it is possible to brightly illuminate the processed region and a wide area around it.
According to the illumination device of the ninth aspect, since the light guide member is integrally provided with the attachment portion for the tool main body, the light guide member can be easily attached to the tool main body without using a separate fixing means such as a clamp. It can be carried out.

It is a side view of the 1st power tool provided with the illuminating device of 1st Embodiment. It is (II) arrow directional view of FIG. 1, Comprising: It is a top view of a 1st power tool. FIG. 3 is a front view of the first power tool as viewed from the front side, as viewed from (III) in FIG. 1. It is a side view of the front-end | tip part of a 1st power tool. This figure has shown the state at the time of screw fastening. It is a top view of the 1st power tool. This figure has shown the state at the time of screw fastening. It is a side view of the 2nd power tool provided with the illuminating device of 2nd Embodiment. It is the (VII) arrow directional view of FIG. 6, Comprising: It is the front view which looked at the 2nd power tool from the front side. It is a side view of the 3rd power tool provided with the illuminating device of 3rd Embodiment. It is (IX) arrow view of FIG. 8, Comprising: It is a top view of a 3rd power tool. It is a (X) arrow view of FIG. 8, Comprising: It is a front view of a 3rd power tool. It is a side view of the 4th power tool provided with the illuminating device of 4th Embodiment. This figure has shown the state which attached the subgrip. It is a (XII) arrow line view of FIG. 11, Comprising: It is a top view of a 4th power tool. This figure has shown the state which attached the subgrip. It is a (XIII) arrow line view of FIG. 11, Comprising: It is a front view of a 4th power tool. This figure has shown the state which attached the subgrip. It is a side view of the 4th power tool in the state where a subgrip was removed. It is (XV) arrow line view of FIG. 14, Comprising: It is a top view of the 4th power tool in the state which removed the subgrip. FIG. 15 is a front view of the fourth power tool with the sub-grip removed, as viewed from the arrow (XVI) in FIG. 14. It is a side view of the 5th power tool provided with the illuminating device of 5th Embodiment. It is (XVIII) arrow directional view of FIG. 17, Comprising: It is a top view of a 5th power tool. Similarly it is a top view of the 5th power tool. It is a (XX)-(XX) line arrow directional view in FIG. It is the (XXI)-(XXI) arrow directional view of FIG. It is a (XXII)-(XXII) arrow directional view of FIG. It is a side view of the 6th power tool provided with the illuminating device of 6th Embodiment. It is a (XXIV) arrow line view of FIG. 23, Comprising: It is a top view of a 6th power tool. It is a (XXV) arrow view of FIG. 23, Comprising: It is a front view of a 6th power tool.

Next, an embodiment of the present invention will be described with reference to FIGS. Each embodiment described below is characterized by a lighting device, and the basic configuration of various forms of power tools to which the embodiment is applied is the same as that in the past, and thus detailed description thereof is omitted.
FIG. 1 shows a first power tool 10 including the lighting device (first lighting device 11) of the first embodiment. The first power tool 10 is exemplified by a rechargeable auto-pack screw driver that can perform screw tightening work while automatically supplying screws one by one.
The first power tool 10 includes a tool body portion 10a, a main handle portion 10b, a connecting screw band holding portion 10c, and a battery pack 10d. The tool body 10a incorporates an electric motor 10e that is activated by using the battery pack 10d as a power source, and outputs rotational power for screw tightening using the electric motor 10e as a drive source. A loop-shaped main handle portion 10b is provided at the rear portion of the tool main body portion 10a, and a connecting screw band holding portion 10c is provided so as to extend downward from the front portion of the tool main body portion 10a. A battery pack 10d is attached to the lower portion of the main handle portion 10b. The battery pack 10d can be reused by removing it and charging it with a separately prepared charger. A switch lever 10f is provided inside the main handle portion 10b. When the switch lever 10f is pulled with a fingertip, the electric motor 10e of the tool body 10a is activated.
The screw supply part 12 is attached to the front part of the tool main body part 10a. The screw supply unit 12 includes a fixed case 12a attached to the tool body 10a side and a movable case 12b supported on the front side of the fixed case 12a so as to be able to reciprocate. The front end portion of the movable case 12b is a material contact portion 12c that contacts the screw fastening material. A known screw feed mechanism is incorporated between the fixed case 12a and the movable case 12b, and a large number of screws are fixed by reciprocating the movable case 12b with a fixed stroke with respect to the fixed case 12a. Screw connection bands (not shown) coupled at intervals are pitch-fed by one pitch in conjunction with the screw tightening operation.
When the user holding the main handle portion 10b presses the tool main body portion 10a in the screw tightening direction with the material contact portion 12c of the movable case 12b in contact with the screw tightening material, the movable case 12b is fixed to the fixed case 12a. On the other hand, when it moves relatively upward (relatively moving rearward in FIGS. 1 and 2), screw tightening proceeds by the rotating bit. When the pressing of the tool body 10a is released after the screw tightening is completed, the movable case 12b is moved downward relative to the fixed case 12a by the spring biasing force, and is loaded between the cases 12a and 12b by this downward movement. The connecting screw strip is pitched and the next screw is fed in front of the screwing bit. Although not shown, the connecting screw band is held along the front surface of the connecting screw band holding portion 10c and is set in a state of entering between the fixed case 12a and the movable case 12b. It is sent upward in FIG. 1 by relative movement.
The first lighting device 11 of the first embodiment is equipped across the screw supply unit 12 having such a movable part (movable case 12b in this example).

The first lighting device 11 of the first embodiment includes a light source 13 and a light guide member 14. In the present embodiment, one LED (light emitting diode) is used as the light source 13. The light source 13 is mounted on a power supply circuit board that uses the battery pack 10d as a power source, and is disposed near the lower end of the tool main body 10a and very close to the battery pack 10d as shown in FIG. ing. One end side of the light guide member 14 is directed to the light source 13.
The light guide member 14 is linearly molded by a mold using a soft acrylic resin as a raw material, has high light transmission performance, and is more flexible than a hard glassy optical fiber, so that the inside of the tool main body 10a. Easy handling and high durability against moving parts.
As shown in FIG. 1, the light guide member 14 whose one end is directed to the light source 13 is routed upward along the rear end portion of the tool body portion 10a, and is routed along the upper portion of the tool body portion 10a. ing. The light guide member 14 is fixed to a certain routing route by being elastically sandwiched between ribs provided on the housing of the tool body 10a.
The light guide member 14 is drawn out of the housing from the upper part of the front end of the tool main body 10a. The light guide member 14 drawn out from the housing of the tool body 10 a is routed further forward along the upper surface of the fixed case 12 a of the screw supply unit 12. As shown in FIGS. 2 and 3, the light guide member 14 is branched into two on the upper surface of the fixed case 12a. The branched portions 14a and 14a of the single light guide member 14 are routed across the left and right sides of the fixed case 12a and across the both sides of the front movable case 12b. The front end portions of both branch portions 14a, 14a reach the vicinity of the front end of the left and right side portions of the movable case 12b. The front end portions of both branch portions 14a and 14a are light irradiation portions 14b and 14b. Both light irradiation parts 14b and 14b are integrally molded in a convex lens shape. Since both the light irradiation portions 14b and 14b function as a convex lens, light is diffusely irradiated, and the screw tightening portion is brightly illuminated in a wider range. As shown in FIGS. 2 and 5, the two light irradiating portions 14b and 14b are elastically fitted into the engaging holes provided on both sides of the movable case 12b, respectively. The movable case 12b is fixed near the front end on both sides.
In this way, the light guide member 14 is split into two parts in the middle, so that the cross-sectional shape changes, and at the front ends of both branch parts 14a and 14a, lens-shaped light whose cross-sectional shape changes respectively. The irradiation part 14b and the engagement convex part 14c are integrally molded, and these correspond to the cross-sectional shape changing part described in the claims.

According to the first power tool 10 including the first illumination device 11 of the first embodiment configured as described above, when the user pulls the switch lever 10f with the fingertip of the hand holding the handle portion 10b, the electric motor 10e is operated. Starts and the screwing bit starts to rotate in the screwing direction. Further, when the switch lever 10f is pulled, the light source 13 is turned on prior to the activation of the electric motor 10e. The light emitted from the light source 13 is efficiently guided by the light guide member 14 and irradiated forward from the light irradiation units 14b and 14b in the vicinity of the front end portions of the left and right side portions of the movable case 12b. Therefore, if the switch lever 10f is pulled while the material contact portion 12c of the movable case 12b is in contact with the screw tightening material, the periphery of the screw tightening portion of the screw tightening material (around the material contact portion 12c) is bright. Illuminated.
As described above, the first lighting device 11 brightly illuminates the periphery of the screw tightening portion of the screw tightening material, so that, for example, even in a dark place, the contact position of the material contact portion 12c with respect to the screw tightening portion is set. Since it is easily visible, accurate screw tightening can be performed. In particular, since the light irradiation parts 14b and 14b are fixed at a position very close to the screw tightening part, the periphery of the screw tightening part can be efficiently illuminated. For this reason, the light source 13 needs to be smaller and smaller in light quantity.
In addition, since the light guide member 14 is formed of a soft acrylic resin as a raw material and molded by a molding die, it can be branched in the middle thereof as illustrated, and in this respect, a hard glassy optical fiber and Can achieve greatly different effects. By using the light guide member 14 branched in the middle, the light tightening site can be brightly illuminated from both the left and right sides by one light source 13, so that the user does not generate a shadow and the user can screw The fastening site can be clearly seen in a brightly illuminated state when viewed from any direction.

Further, by using a light guide member 14 made of a soft acrylic resin having a light transmittance equivalent to that of an optical fiber and higher handling than the optical fiber, the light irradiation parts 14b and 14b are fixed at positions very close to the screw tightening part. The light source 13 can be built in a portion close to the battery pack 16d as a power source and the power supply circuit, and in this respect, the degree of freedom of arrangement of the first lighting device 11 can be greatly increased.
In this regard, if a hard glassy optical fiber is used as the light guide member, it becomes extremely difficult to route the inside of the tool main body along a path where the optical fiber is bent finely. For this reason, the light source and the light irradiating part are brought closer to each other in order to shorten the handling length as much as possible.As a result, the light irradiating part is set at a part away from the screw tightening part, and the irradiation efficiency for the screw tightening part is If the light source is set at a site close to the screw tightening site, there is a problem that the risk of damage increases and the durability is lowered.
According to the first illuminating device 11 of the first embodiment, since the light guide member 14 is a linearly molded material made of a soft acrylic resin, it is different from an optical fiber made of hard glass. The tool main body 10a can be easily routed over a long distance with the same feeling as electrical wiring such as a lead wire, so that the light irradiating portions 14b and 14b can be used as tool tips (near the material contact portion 12c). It can arrange | position and can incorporate the light source 13 in the tool main-body part 10a, and can ensure a high irradiation rate and durability. Further, by arranging the light source 13 and its power supply circuit in a portion close to the battery pack 10d as a power source, the wiring length of the lead wire or the like can be shortened.
Furthermore, since the light guide member 14 can be obtained by integral molding using a molding die, the housing of the tool main body 10a or the fixed case 12a, or the movable case, like the engaging projection 14c of the illustrated light irradiation unit 14b. Engagement protrusions as fixing means for the case 12b can be integrally formed at an appropriate number of locations, and no additional fixing means such as a clamp is required. In an optical fiber, the convex part for fixation cannot be provided integrally. Since the light guide member 14 of this example is obtained by molding of a soft acrylic resin, it is not a simple linear shape whose cross-sectional shape does not change, and a portion having various functions can be arbitrarily provided integrally therewith. It is possible to add value that cannot be obtained with optical fibers.
In addition, since the light guide member 14 is molded from a soft acrylic resin and has high flexibility, both cases 12a, 12b, As shown in FIGS. 4 and 5, the light guide member 14 routed between 12 b can be easily followed, and in this respect, high durability of the first lighting device 11 can be ensured. .

The first lighting device 11 of the first embodiment described above can be applied to various types of power tools with appropriate modifications. The 2nd power tool 20 provided with the 2nd illuminating device 21 of 2nd Embodiment is shown by FIG.6 and FIG.7. The second power tool 20 is exemplified by a rechargeable impact screw tightening machine (rotary impact tool). The second power tool 20 includes a tool main body 20a, a handle 20b, and a battery pack 20c.
The tool body 20a includes a substantially cylindrical resin housing 20d and a metal impact case 20j coupled to the front side of the tool body 20a, and an electric motor 20e as a drive source is provided in the rear housing 20d. The front impact case 20j has a structure in which a rotary impact mechanism 20f is incorporated. The rotary striking mechanism 20f is a conventionally known one, and has a configuration that strikes the spindle 20i in the rotational direction when the rotational load of the spindle 20i increases with respect to the rotational output of the electric motor 20e. A resin front cover 20h is mounted around the impact case 20j. A spindle 20i for mounting a screw tightening bit is supported on the inner peripheral side of a sleeve portion 20k provided at the front portion of the impact case 20j.
The handle 20b is provided in a state of protruding sideways from the side of the housing 20d (side of the tool body 20a). An activation switch lever 20g is disposed at the base of the handle portion 20b. A battery pack 20c is attached to the tip of the handle portion 20b.

The second lighting device 21 of the second embodiment includes a light source 22 and a light guide member 23. As in the first embodiment, the light source 22 is an LED (light emitting diode). The light source 22 is disposed inside the rear end of the front cover 20h and near the upper side of the switch lever 20g. The light source 22 uses the battery pack 20c as a power source, and lights up when the switch lever 20g is pulled. One end side of the light guide member 23 is directed to the light source 22.
As in the first embodiment, the light guide member 23 is integrally formed using a soft acrylic resin as a material. The light guide member 23 of the second embodiment includes a flat plate portion 23b having a flat plate shape and four branch portions 23a to 23a branched therefrom. The flat plate portion 23b is integrally formed on the inner peripheral surface of the front cover 20h by two-color molding. Even when the front cover is made of metal, a similar flat plate portion can be integrally formed on the inner surface thereof. The light source 22 is directed to the rear surface of the flat plate portion 23b. In addition, the flat plate portion 23b is plated on the surface of the flat plate portion 23b except for its rear surface in order to prevent light leakage and ensure high illuminance.
The four branched portions 23a to 23a are respectively routed between the impact case 20j and the front cover 20h, and the tip of each branch portion 23a is a sleeve portion 20k of the impact case 20j. Between the front cover 20h and the inner periphery of the front end of the front cover 20h. A lens part (cross-sectional shape changing part) for diffusing and irradiating light is provided at the tip of each branch part 23a. This lens unit is a light irradiation unit 23c. The light irradiation part 23c of each branch part 23a is elastically fitted in the engagement hole provided in the sleeve part 20k, and is fixed to the respective four equal positions. Light is irradiated from these four equal positions, and the processing site is illuminated brightly.
According to the illuminating device 21 of the second embodiment configured as described above, since the light guide member 23 is obtained by molding using a soft acrylic resin as a material, as illustrated, the flat plate portion 23b and the four branched from this are illustrated. The branch portions 23a to 23a can be integrated. For this reason, as compared with the configuration in which four optical fibers are used for one light source, these four branch portions 23a to 23a are used in a more limited space to a part away from the light source 22, for example, electrical wiring. It can be managed efficiently with a feeling like In the case of the second embodiment, since light is irradiated from four positions around the processing site (screw tightening site), no shadow is generated, so that the user can clearly see the screw tightening site. In this respect, work efficiency can be improved.
Further, since the light guide member 23 is integrally formed on the inner peripheral surface of the resin front cover 20h by the two-color molding method, the assembling work can be simplified.

The 3rd power tool 30 provided with the 3rd illuminating device 31 of 3rd Embodiment is shown by FIGS. 8-10. The third power tool 30 is an electric drill for drilling, and includes a tool main body portion 30a, a handle portion 30b, and a chuck portion 30c. The tool main body 30a includes an electric motor as a drive source between the left and right half housings 30d and 30d having a half structure. This electric motor is driven using an AC power source as a power source. A chuck portion 30c is attached to a spindle that rotates using this electric motor as a drive source.
The handle portion 30b is integrally formed with the left and right half housings 30d and 30d of the tool body portion 30a. A switch lever 30f is provided at the base of the handle portion 30b. In addition, a power cord 30g for supplying AC power is drawn into the tip of the handle portion 30b.
The third lighting device 31 includes two light sources 31a and 31a and two light guide members 31b and 31b. LEDs are used for the two light sources 31a and 31a, respectively. As shown in FIG. 9, the two light sources 31a and 31a are provided in the vicinity of the rear end of the tool main body 30a. One end of the light guide member 31b is directed to each of the two light sources 31a and 31a. The two light guide members 31b and 31b are each linearly molded using a soft acrylic resin as a raw material, and are integrally molded by the two-color molding method on the inner surfaces of the left and right half housings 30d and 30d that are also made of resin. .
The front end portions of the two light guide members 31b and 31b are held by the light emission windows 30e and 30e provided at the front portions of the left and right half housings 30d and 30d. A lens unit for diffused light is integrally formed at the distal ends of the light guide members 31b and 31b, and this lens unit is also used as the light irradiation unit 31c in the third embodiment. The light irradiation part 31c is elastically fitted into the light emission window 30e, and the tip portions (light irradiation parts 31c) of the two light guide members 31b and 31b are respectively held by the light emission window 30e. Light is diffusely irradiated forward from the light irradiators 31c and 31c in the light emission windows 30e and 30e, whereby the periphery of the drilling portion is brightly illuminated from both the left and right sides. In the case of the third embodiment, the cross-sectional shapes of the left and right light guide members 31b and 31b are changed into large circles by the lens shapes of the both light irradiation portions 31c and 31c, and this corresponds to the cross-sectional shape changing portion.
Thus, according to the illuminating device 31 of 3rd Embodiment, it does not branch as mentioned above, but uses the soft acrylic resin as a raw material, and each one is provided in the inner surface of the left and right half housings 30d and 30d of the tool main body 30a. By forming the light guide member 31b in two colors, the light guide members 31b and 31b can be routed along a narrow and bent path. According to the light guide members 31b and 31b, the light irradiation portions 31c and 31c (lens shape portions) are arranged near the front end portion of the tool main body portion 31a, while the light sources 31a and 31a are rear end portions of the tool main body portion 30a. Since the light sources 31a and 31a can be disposed near the power supply circuit disposed in the handle portion 30b, for example, the wiring length of the lead wire or the like can be shortened as much as possible. it can.

The 4th power tool 40 provided with the 4th illuminating device 41 of 4th Embodiment is shown by FIGS. 11-13. The fourth power tool 40 is an AC power source type vibration drill, and includes a handle portion 40b at the rear portion of the tool main body portion 40a and a sub grip 40c at the front portion. For example, the user can hold the power tool 40 firmly with both hands by holding the handle portion 40b with the right hand and the subgrip 40c with the left hand, thereby performing a drilling operation.
The tool main body 40a includes an electric motor that is driven by an AC power source as a drive source. A switch lever 40d is disposed at the base of the handle portion 40b. When the switch lever 40d is pulled, the electric motor is activated, and the chuck portion 40e attached to the spindle rotates. A power supply cord 40g for supplying power is drawn into the tip of the handle portion 40b.
The sub grip 40c is attached to the tip of the tool main body 40a via a ring-shaped clamp 40f. 12 and 13, the sub grip 40c is shown in a state of being attached in a state of protruding to the left side of the tool body 40a. The position (protruding direction) of the sub grip 40c can be arbitrarily changed by loosening the clamp part 40f. Moreover, the subgrip 40c can also be removed from the tool main body 40a by removing the clamp part 40f.
The illumination device 41 according to the fourth embodiment includes one light source 42 and one light guide member 43. The light source 42 is an LED, and is built in a portion near the rear portion of the tool main body 40a and close to the power circuit board. A holding hole is provided in the housing of the tool main body 40 a so as to face the light source 42, and one end side of the light guide member 43 is inserted and held in the holding hole, and the one end side is directed to the light source 42. The light guide member 43 is integrally formed with a mold using a soft acrylic resin as a material, and is branched into two branch portions 43a and 43a in the middle thereof. The two branch portions 43a and 43a are routed forward along the upper surface of the tool main body portion 40a. Engagement convex portions 43c to 43c (cross-sectional shape changing portions) are integrally provided at an appropriate interval in one unbranched portion 43d and both branch portions 43a and 43a. Each engaging projection 43c is elastically fitted into an engaging hole provided in the main body housing of the tool main body 40a, so that one portion 43d of the light guide member 43 and the branch portions 43a and 43a are formed on the main body housing. It is held along the outer surface.
Moreover, the front-end | tip part of both branch part 43a, 43a is each made into the light irradiation part 43e. The engaging projections 43c provided integrally with the two light irradiating portions 43e and 43e, respectively, are elastically fitted into the engaging holes provided in the clamp portion 40f, whereby the two light irradiating portions 43e and 43e become the tool body. 40a is held side by side at the front end.

According to the illumination device 41 of the fourth embodiment, when the switch lever 40d is pulled, the tool body 40a is activated and the light source 42 emits light. The light emitted from the light source 42 is guided to the front side of the tool main body 40a by the light guide member 43, and irradiated forward from the light irradiation units 43e and 43e. With the light irradiated from both light irradiation parts 43e and 43e, a drilling process site | part can be illuminated brightly, and an operation | work can be performed efficiently by this.
Also in the case of the fourth embodiment, the light source 42 is arranged at the rear part of the tool main body 40a, and the light irradiation parts 43e, 43e are arranged at the front part. As a result, a soft acrylic resin is used as a material between them. A flexible light guide member 43 is routed. Engaging protrusions 43c to 43c are integrally formed on the light guide member 43, and the light guiding member is formed by elastically fitting each engaging protrusion 43c into an engagement hole on the tool body 40a side. 43 routing routes are fixed. For this reason, a separate fixing means such as a clamp is not required.
Furthermore, also in the fourth embodiment, the branched light guide member 43 can be obtained by molding. Therefore, the two light irradiating portions 43e and 43e are arranged in a portion as close as possible to the processing portion by efficiently handling the limited space. Can be arranged. On the other hand, when an optical fiber is used as the light guide member, it is necessary to direct the two optical fibers to one light source and route the two optical fibers from the rear part to the front part of the tool body. In terms of optical fiber, which is relatively hard glassy, the degree of freedom in handling is significantly reduced. The illustrated light guide member 43 is integrally formed with a mold using a soft acrylic resin as a raw material, and has a feature that the degree of freedom in shape and the degree of freedom in handling are extremely high.

The routing route of the light guide member 43 can be easily changed by removing the engaging projections 43c to 43c provided integrally. As shown in FIG. 11, engagement holes 40h and 40h that are not used when the subgrip 40c is attached are provided on both sides of the tip of the tool body 40a. A form in which the left and right engagement holes 40h, 40h are used is shown in FIGS. In FIGS. 11 to 13, the sub grip 40 c is attached to the tool main body 40 a. As described above, the sub grip 40c can be easily removed by loosening the clamp portion 40f. The power tool 40 with the sub-grip 40c removed is shown in FIGS. By removing the sub-grip 40c, the user can perform drilling while holding the handle 40b with the right hand and directly supporting the front part of the tool body 40a from below with the left hand.
In order to remove the sub grip 40c from the tool body 40a, both the light irradiation parts 43e and 43e of the light guide member 43 are removed from the clamp part 40f before the clamp part 40f is loosened. Both light irradiation parts 43e and 43e can be easily removed by pulling out the engaging convex parts 43c and 43c from the engaging hole of the clamp part 40f.
Both light irradiation parts 43e, 43e removed from the clamp part 40f are engaged with the engaging convex parts 43c, 43c in the engaging holes 40h, 40h which are not used in the attached state of the sub grip 40c as shown in FIGS. Can be fixed to the left and right side portions of the tool main body 40a.
Thus, according to the illuminating device 41 of 4th Embodiment, the position of the light irradiation parts 43e and 43e can be changed easily, and it respond | corresponds easily to both the state which attached and removed the subgrip 40c. In any case, the light irradiation unit can be disposed in the vicinity of the tip of the tool body 40a, which is a part closer to the processing part, and in this respect, the utility value of the illumination device 41 can be further enhanced. .

The 5th power tool 50 provided with the 5th illuminating device 51 of 5th Embodiment is shown by FIGS. In the fifth embodiment, a so-called reciprocating saw (reciprocating cutting machine) is exemplified as the fifth power tool 50. The power tool 50 includes a tool main body 50a, a reciprocating mechanism 50b provided at the tip thereof, a loop-shaped handle 50c provided at the rear of the tool main body 50a, and a battery pack 50d. From the front end of the reciprocating mechanism 50b, an output rod 50f that reciprocates in the axial direction with a blade 50e attached thereto and a material contact arm 50g called a shoe project. The blade 50e has a band plate shape, and a blade edge is provided along one side portion thereof. The blade 50e is used with its blade tip turned upside down in accordance with the work mode.
An activation switch lever 50h is disposed on the handle 50c. A battery pack 50d is attached to the lower portion of the handle portion 50c. The battery pack 50d can be reused by removing it and charging it with a separately prepared charger.
The illumination device 51 of the fifth embodiment includes a single light source 52 and two light guide members 53 and 54. The light source 52 is disposed in the vicinity of the upper portion of the front end of the tool main body 50a and in the vicinity of the joint with the reciprocating mechanism 50b. Also in the fifth embodiment, an LED is used as the light source 52. One end portion of the first and second light guide members 53 and 54 is directed to the light source 52. The first light guide member 53 or the second light guide member 54 directed to one light source 52 can be arbitrarily switched by a user's operation, and the fifth embodiment is characterized in this respect.
The first and second light guide members 53 and 54 are linearly and integrally molded using a soft acrylic resin as in the above embodiments, and have high light transmittance and flexibility, respectively.

As shown in FIGS. 17-19, the slider 55 is provided in the upper part of the rear end of the reciprocating mechanism part 50b so that a slide operation is possible for a fixed distance in the left-right direction. The slider 55 holds the rear end portions 53a, 54a of the first and second light guide members 53, 54 at a certain distance from each other on the left and right. When the user slides the slider 55 to the right or left, the rear end portion 53a of the first light guide member 53 is directed toward one light source 52, or the rear end of the second light guide member 54. The state in which the portion 54a is directed can be switched. As shown in FIGS. 21 and 22, the position of the slider 55 is held by a leaf spring 55a.
The first light guide member 53 is routed to the front end side along the upper surface of the reciprocating mechanism 50b. A flat top plate portion 50i is provided at the front end portion of the reciprocating mechanism portion 50b. As shown in FIG. 20, the front end portion (light irradiation portion 53b) of the first light guide member 53 is held above the top plate portion 50i and above the output rod 50f. On the other hand, the second light guide member 54 is routed along the upper surface of the reciprocating mechanism 50b in parallel with the first light guide member 53 on the rear side of the reciprocating mechanism 50b. In addition, the routing route is bent downward along the right side of the reciprocating mechanism 50b. As shown in FIG. 20, the front end portion (light irradiation portion 54b) of the second light guide member 54 is held near the lower portion of the top plate portion 50i and below the output rod 50f.
The light irradiating portions 53b and 54b of the first and second light guide members 53 and 54 are provided with lens portions as cross-sectional shape changing portions. Light is diffusely irradiated by this lens unit. Further, the lens portions are elastically fitted into the engagement holes of the top plate portion 50i, whereby the light irradiation portions 53b and 54b are held above and below the top plate portion 50i.
As shown in FIGS. 18 and 21, when the user slides the slider 55 to the first position on the right side (lower side in FIG. 18), the rear end portion 53 a of the first light guide member 53 is directed toward the light source 52. On the other hand, as shown in FIGS. 19 and 22, when the user slides the slider 55 to the second position on the left side (the upper side in FIG. 19), the rear end portion 54 a of the second light guide member 54 becomes the light source 52. Directed. For this reason, when the user pulls the switch lever 50h while the slider 55 is switched to the first position, the light emitted from the light source 52 is irradiated from the upper side of the blade 50e forward through the first light guide member 53. The On the other hand, when the user pulls the switch lever 50h while the slider 55 is switched to the second position, the light emitted from the light source 52 is irradiated from the lower side of the blade 50e forward through the second light guide member 54. The As described above, by the switching operation of the slider 55, the cutting operation can be performed by arbitrarily selecting the state in which the upper side of the blade 50e is brightly illuminated and the state in which the lower side is brightly illuminated according to the cutting form.

This switching is convenient when the direction of the blade edge of the blade 50e is changed downward or upward in FIG. When cutting with the blade tip of the blade 50e mounted downward, the slider 55 is switched to the first position as shown in FIG. 18, and light is emitted from the light irradiation part 53b of the first light guide member 53. When cutting with the blade tip of the blade 50e facing upward, as shown in FIG. 19, the slider 55 is switched to the second position and light is irradiated from the light irradiation portion 54b of the second light guide member 54. As a result, in any case, light is irradiated from the back portion of the blade 50e (the side opposite to the cutting edge), so that the cutting process can be performed in a brightly illuminated state without generating a shadow at the cutting site.
In the first and second light guide members 53 and 54, as in the above-described embodiments, engaging convex portions as cross-sectional shape changing portions are integrally formed at appropriate intervals, and the engaging convex portions are reciprocated. The first and second light guide members 53 and 54 are held in a fixed routing path by being elastically fitted into the engagement holes of the mechanism portion 50b.
Also in the illumination device 51 of the fifth embodiment configured as described above, the first and second light guide members 53 and 54 integrally formed using a soft acrylic resin as a light guide member are used, so that the tool body The portion 50a and the reciprocating mechanism portion 50b can be easily routed along a narrow and bent path, and as a result, the light source 52 is away from the light irradiation portions 53b and 54b and closer to the power circuit board. The wiring length of the lead wire between the light source 52 and the power supply circuit board can be shortened by arranging in the above.
In addition, the light guide members 53 and 54 are integrally formed with an engaging convex portion for holding the routing path as a cross-sectional shape changing portion and a lens portion as the light irradiation portions 53b and 54b. For this reason, unlike the case where an optical fiber is used as the light guide member, there is no need to prepare a fixing means such as a holding clamp or a lens for light diffusion irradiation, so the configuration is simplified and the cost is reduced. Can be achieved.

23 to 25 show a sixth power tool 60 provided with the sixth lighting device 61 of the sixth embodiment. The sixth power tool 60 is exemplified by a rechargeable tacker. The sixth power tool 60 includes a tool main body 60a with a built-in electric motor, a striking mechanism 60b, a magazine 60c loaded with a number of driving tools, a handle 60d, and a battery pack 60e.
A switch lever 60g is disposed above the handle portion 60d. When the switch lever 60g is pulled, the electric motor of the tool main body 60a is activated using the battery pack 60e as a power source. When the electric motor is activated, the hammering mechanism 60b is actuated to drive the driving tool in the magazine 60c one by one from the nose 60f provided at the front end of the hammering mechanism 60b.
In the case of the sixth embodiment, the light source 62 is accommodated in the lower part of the tool main body 60a. An LED is also used for the light source 62. The light source 62 is turned on using the battery pack 60e as a power source when the switch lever 60g is pulled. Light emitted from the light source 62 is guided through the light guide member 63 to the nose portion 60f. The light guide member 63 is linearly and integrally molded using a soft acrylic resin as in the above embodiments, and has high light transmittance and flexibility. The rear end portion 63 a of the light guide member 63 is directed to the light source 62 inside the tool body 60 a. The light guide member 63 is routed upward from the light source 62.

A window 60h is provided on the side of the tool body 60a. The light guide member 63 is drawn from the window 60h to the outside of the tool main body 60a. The light guide member 63 drawn out through the window 60h is routed upward along the side of the tool body 60a. A holding recess 60i is provided on the side of the tool body 60a. The light guide member 63 is held in a fixed routing path by fitting and holding the light guide member 63 with its elastic force in the holding recess 60i.
The light guide member 63 is routed to the vicinity of the tip of the nose portion 60f. The front end part of the light guide member 63 is a light irradiation part 63b. An engaging convex portion 63c as a cross-sectional shape changing portion is integrally formed with the light irradiation portion 63b. The engaging projection 63c is elastically fitted into an engagement hole provided in the nose portion 60f, and the front end 63b is fixed so as not to be displaced. Moreover, the light irradiation part 63b is integrally molded by the lens shape as a cross-sectional shape change part. The light from the light source 62 is diffused and irradiated toward the driving site by the lens-shaped light irradiation unit 63b.
According to the illuminating device 60 of the sixth embodiment configured as described above, the light emitted from the light source 62 is irradiated with light by the light guide member 63 that is integrally formed of a soft acrylic resin and has high light transmittance and flexibility. Since the light is guided to the part 63b, the light source 62 can be installed in the vicinity of the lower end part of the tool body part 60a away from the light irradiation part 63b, and the path from the inside of the tool body part 60a to the outside is made to follow finely. Can be managed.
Further, since the light guide member 63 is integrally provided with an engaging convex portion 63c for holding the light guide member 63 itself with respect to the tool body 60a, a fixing means such as a clamp is separately used. Without being held on a certain route. Furthermore, the light guide member 53 is integrally formed with parts having various functions such as the engaging convex portion 63c and the lens-shaped portion of the light irradiation portion 63b. In this respect, in the optical fiber made of hard glass, You can enjoy various benefits that cannot be obtained.

The greatest feature of the first to sixth lighting devices 10 to 60 according to each embodiment described above is that the light guide member (14, 23, 31b, 43, 53, 54, 63) is molded from a soft acrylic resin. It is in the point of being integrally formed by the mold. Therefore, it is possible to form a bifurcated shape like the light guide members 14, 23, and 43 in the first, second, and fourth embodiments, which can be obtained with a hard glassy optical fiber. A large effect that cannot be obtained. In addition, since it is made of soft acrylic resin and has high flexibility, it is possible to handle a narrow space in the tool main body at a tight angle. it can.
Further, since the light guide member (14, 23, 31b, 43, 53, 54, 63) is integrally formed with a molding die, the cross-sectional shape at an arbitrary position in the longitudinal direction is continuous or discontinuous. Can be easily obtained. As the cross-sectional shape changing portion, in addition to the above-described branch shape, the power applied to the change in thickness, the attachment portion (engagement convex portion 14c, etc.) to the tool main body side, or the lens shape portion in the light irradiation portion, etc. It can be set arbitrarily according to the form of the tool.
In addition, since the light guide member (14, 23, 31b, 43, 53, 54, 63) is obtained by integral molding using a soft acrylic resin as a raw material, the resin is formed by a so-called two-color molding method. This can be formed integrally with the housing, which is a great advantage that cannot be realized with an optical fiber made of hard glass. Although the second and third embodiments have been exemplified for the integral molding of the light guide member into the resin housing by the two-color molding method, the present invention can be applied to other embodiments.
On the other hand, the structure in which the light guide member 14 (branch portions 14a and 14a) follows the movable portion between the fixed case 12a and the movable case 12b in the first embodiment, and the light irradiation by the presence or absence of the sub grip 40c in the fourth embodiment. The configuration in which the light guide member is made to follow the position change of the unit and the switching structure of the light guide members 53 and 54 in the fifth embodiment can be realized even when an existing optical fiber is used as the light guide member.
The illustrated first to sixth lighting devices are not limited to the electric power tool illustrated as well, and can be applied to a driving tool driven by a compressed air, for example. In this case, apart from compressed air as a power source, for example, a battery pack may be attached to the handle portion as a power source dedicated to the lighting device.
Moreover, in each embodiment, although the structure which integrally molds the lens part for light diffusion irradiation in the front end part of the light guide member was illustrated, it is good also as a structure using the lens prepared separately. Moreover, it is good also as a structure which abbreviate | omits the lens part for light diffusion irradiation.

10 ... 1st power tool (rechargeable autopack screwdriver)
DESCRIPTION OF SYMBOLS 10a ... Tool body part, 10b ... Main handle part, 10c ... Connection screw belt holding part 10d ... Battery pack, 10e ... Electric motor, 10f ... Switch lever 11 ... 1st illuminating device (1st Embodiment)
DESCRIPTION OF SYMBOLS 12 ... Screw supply part, 12a ... Fixed case, 12b ... Movable case, 12c ... Material contact part 13 ... Light source 14 ... Light guide member, 14a ... Branch part, 14b ... Light irradiation part, 14c ... Engagement convex part 20 ... Second power tool (rechargeable impact screw tightener)
20a ... tool body, 20b ... handle portion, 20c ... battery pack 20d ... housing, 20e ... electric motor, 20f ... rotary impact mechanism 20g ... switch lever, 20h ... front cover, 20i ... spindle 20j ... impact case, 20k ... Sleeve portion 21 ... second illumination device 22 ... light source 23 ... light guide member 23a ... branching portion 23b ... flat plate portion 23c ... light irradiation portion 30 ... third power tool (electric drill)
30a ... Tool body part, 30b ... Handle part, 30c ... Chuck part 30d ... Half housing, 30e ... Projection window 30f ... Switch lever, 30g ... Power cord 31 ... Third illumination device, 31a ... Light source, 31b ... Light guide member , 31c ... Light irradiation unit 40 ... Fourth power tool (vibration drill)
40a ... Tool body part, 40b ... Handle part, 40c ... Subgrip 40d ... Switch lever, 40e ... Chuck part, 40f ... Clamp part 40g ... Power cord, 40h ... Engagement hole 41 ... Fourth illumination device 42 ... Light source 43 ... Light guide member 43a ... branching portion, 43c ... engagement convex portion, 43d ... one part, 43e ... light irradiation portion 50 ... fifth power tool (rechargeable reciprocating saw)
50a ... Tool body part, 50b ... Reciprocating mechanism part, 50c ... Handle part 50d ... Battery pack, 50e ... Blade, 50f ... Output rod 50g ... Material contact arm, 50h ... Switch lever, 50i ... Top plate part 51 ... No. 5 Illumination device 52 ... Light source 53 ... 1st light guide member, 53a ... Rear end part, 53b ... Light irradiation part 54 ... 2nd light guide member, 54a ... Rear end part, 54b ... Light irradiation part 55 ... Slider, 55a ... Leaf spring 60 ... Sixth power tool (rechargeable tacker)
60a ... Tool body part, 60b ... Hitting mechanism part, 60c ... Magazine, 60d ... Handle part 60e ... Battery pack, 60f ... Nose part, 60g ... Switch lever, 60h ... Window part 60i ... Holding recess 61 ... Sixth illumination device 62 ... light source 63 ... light guide member, 63a ... rear end part, 63b ... light irradiation part, 63c ... engagement convex part

Claims (9)

A lighting device that circulates a light guide member between a light source and a light irradiation unit provided on a tool body of a power tool, and irradiates light from the light source from the light irradiation unit through the light guide member,
The said light guide member is an illuminating device shape | molded in the shape branched to the several light irradiation part. 2. The illumination device according to claim 1, wherein each branch tip portion of the light guide member is used as the light irradiation unit to irradiate the processing site with light from a plurality of directions. A lighting device that circulates a light guide member between a light source and a light irradiation unit provided on a tool body of a power tool, and irradiates light from the light source from the light irradiation unit through the light guide member,
The light guide member is an illuminating device integrally formed in a housing of the tool body using a soft acrylic resin as a material. 4. The lighting device according to claim 1, wherein the surface of the light guide member and / or the holding portion on the tool main body side that holds the light guide member is plated. 5. 5. The illumination device according to claim 3, wherein the light guide member is branched, and the branch tip portion is used as the light irradiation unit to irradiate a plurality of locations. 6. The illumination device according to claim 3, wherein a range of the light guide member on a light source side is integrally formed on an inner surface of a housing of the tool body, and the light irradiation unit side The lighting device in which the range of is routed from the inside of the housing to the outside. A lighting device that irradiates light from the light source through the light guide member through the light guide member between the light source and the light irradiation unit provided in the tool body of the power tool,
The light guide member is formed by using a soft acrylic resin as a raw material, and has a cross-sectional shape changing portion in which a cross-sectional shape changes along a routing route thereof. 8. The illuminating device according to claim 7, wherein a lens part is provided at a distal end portion of a routing path of the light guide member as the cross-sectional shape changing part, and the lens part is the light irradiating part. The lighting device according to claim 7, wherein the light guide member is provided with an attachment portion for the tool main body side as the cross-sectional shape changing portion.

Images