JP2016107375A - Electric tool and power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the design of a resin housing.SOLUTION: An impact driver 1 includes: a brushless motor; and a body housing 7 and a rear cover 9 which house the brushless motor and are made of a resin; a coating 90 applied to outer surfaces of the body housing 7 and the rear cover 9 and containing metal powder; and a switch for activating the brushless motor. The coat 90 allows the impact driver 1 to attain metallic sheen and achieve excellent aesthetic quality.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric power tool such as an impact driver and a power tool such as an air nailing machine having a resin housing.

  As for electric tools and power tools, those in which the outer housing is made of resin are well known. For example, Non-Patent Document 1 discloses a rechargeable impact driver, an air nailing machine, a rechargeable cleaner, and the like whose housing is made of resin.

Makita General Catalog 2014-10, October 2014, Makita Corporation, [Search on November 25, 2014], Internet <http://www.makita.co.jp/product/ecatalog/sougou/index_f. html # 16, http://www.makita.co.jp/product/ecatalog/sougou/index_f.html#108, http://www.makita.co.jp/product/ecatalog/sougou/index_f.html# 190>

  In the conventional electric tool, power tool, etc., as a measure for improving the design other than the shape, a colorant is added to the resin to increase the color variation.

  Accordingly, an object of the present invention is to provide an electric tool and a power tool that are excellent in design.

In order to achieve the above object, an invention according to claim 1 is an electric tool, comprising: an electric motor; a resin housing that houses the electric motor; and at least a part of the housing; It is characterized by comprising the paint to contain and the switch for starting an electric motor.
In order to achieve the above object, an invention according to claim 2 is an electric tool, comprising: an electric motor; a resin-made housing that houses the electric motor; and at least a part of the housing; It contains the coating which contains and the switch for starting an electric motor, The volume content rate of the metal powder in coating is 50% or less, It is characterized by the above-mentioned.
The invention described in claim 3 is characterized in that, in the configuration of claim 1 or 2, an insulating coating is applied to the surface of the paint.
According to a fourth aspect of the present invention, in the configuration of the first or second aspect, an insulating coating is applied to the surface of the metal powder.
In order to achieve the above object, an invention according to claim 5 is a power tool comprising: a motor having a rotating shaft; a resin housing that houses the motor; a bearing that supports the rotating shaft; and a housing. And a bearing holding portion for holding the bearing, wherein at least a part of the housing excluding the bearing holding portion is coated.
In order to achieve the above object, a sixth aspect of the present invention is a power tool, which is a motor having a rotating shaft, a resin housing that houses the motor, and a slide that is slidable relative to the housing. An element and a sliding support part formed on the housing and supporting the sliding element are provided, and at least a part of the housing excluding the sliding support part is coated.
To achieve the above object, the invention according to claim 7 is a power tool, comprising a motor, a resin-made housing for housing the motor, and a coating applied to at least a part of the housing; And a soft material that covers at least a part of the coating, and the thickness of the coating is 0.4 mm or less.
In order to achieve the above object, an invention according to claim 8 is a power tool, comprising a motor, a resin-made housing for housing the motor, and a base material applied to at least a part of the surface of the housing. And coating applied to at least a part of the surface of the base material.
In order to achieve the above object, an invention according to claim 9 is a power tool, comprising: a motor; a resin housing that houses the motor; and a coating that is applied to at least a part of the surface of the housing; And an overcoat applied to at least a part of the coating.
To achieve the above object, the invention according to claim 10 is a power tool, comprising: a motor; a resin housing that houses the motor; and a coating applied to at least a part of the surface of the housing; The housing color and the paint color are similar colors.

  According to the present invention, by applying coating, even a resin housing is excellent in design.

It is a perspective view of an impact driver. It is a right view of an impact driver. It is a rear view of an impact driver. It is a longitudinal cross-sectional view of an impact driver. It is explanatory drawing of the right half housing, (A) shows a right side surface, (B) shows a left side surface, (C) shows a back surface, (D) shows a bottom surface, respectively. It is explanatory drawing of the left half housing, (A) shows a left side surface, (B) shows a right side surface, (C) shows a back surface, (D) shows a bottom surface, respectively. It is an expanded sectional view of a paint part. It is an expanded sectional view of an elastomer part. It is explanatory drawing of a rear cover, (A) shows a back surface, (B) shows a right side surface, and (C) shows a front surface, respectively. It is an expanded sectional view of the paint part which gave top coat on printing.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view of an impact driver as an example of an electric tool, a power tool, and an electric device, FIG. 2 is a right side view, FIG. 3 is a rear view, and FIG. The impact driver 1 has a main body 2 extending in the front-rear direction and a handle 3 formed downward. An anvil 4 serving as a final output shaft projects from the tip of the main body 2, and a mounting portion 5 provided at the lower end of the handle 3. Is mounted with a battery pack 6 containing a plurality of rechargeable batteries as a power source.
The housing of the main body 2 includes a resin main body housing 7 in which a brushless motor 8 as an electric motor is accommodated and the handle 3 is extended, a rear cover 9 assembled to the rear of the main body housing 7, and a front of the main body housing 7. And a metal hammer case 10 that houses the spindle 11 and the striking mechanism 12. Of these, the main body housing 7 is formed by assembling a pair of left and right halved housings 7a, 7b with screws 13, 13,.

The brushless motor 8 is an inner rotor type including a stator 14 and a rotor 15 inside thereof. First, the stator 14 includes a cylindrical stator core 16 formed of a plurality of laminated steel plates, a front insulator 17 and a rear insulator 18 provided on axially front and rear end surfaces of the stator core 16, and front and rear insulators 17, 18. A plurality of coils 19, 19... Wound around the stator core 16. The stator 14 is held coaxially with the main body 2 by ribs 20 protruding in the circumferential direction on the inner surfaces of the half housings 7a and 7b.
The rotor 15 is disposed around the rotating shaft 21 at the axis, the substantially cylindrical rotor core 22 formed by laminating a plurality of steel plates, the outer surface of the rotor core 22, and the cylindrical shape. Permanent magnets 23 whose polarities are alternately changed in the circumferential direction and a plurality of sensor permanent magnets 24, 24,... Arranged radially on the front side thereof. A sensor circuit board 25 mounted with three rotation detection elements (not shown) for detecting the position of the sensor permanent magnet 24 and outputting a rotation detection signal is attached to the front insulator 17 by screws 26.

  The rear cover 9 is attached to the rear surface of the main body housing 7 from behind by screws 27, 27. A bearing 29 held by a bearing holding portion 28 on the front surface of the rear cover 9 supports the rear end of the rotary shaft 21. Yes. Reference numeral 30 denotes a motor cooling fan attached to the rotary shaft 21 in front of the bearing 29. Here, the central portion is a bulging portion 31 that bulges forward in a mortar shape, and the bearing 29 is a bulging portion. It is arranged so as to overlap with the bulging portion 31 immediately behind 31. Thereby, the protrusion amount to the back of the main body 2 including the rear cover 9 is suppressed. Exhaust ports 32, 32,... Positioned on the outer side in the radial direction of the fan 30 are formed on the side surface of the rear cover 9, and intake ports 33, 33 are formed on the side surface of the main body housing 7 on the outer side in the radial direction of the sensor circuit board 25. Is formed.

On the other hand, the front end of the rotating shaft 21 penetrates the bearing box 34 held in the main body housing 7 in front of the brushless motor 8 and protrudes forward, and is supported by a bearing 35 held in the rear part of the bearing box 34. . Reference numeral 36 denotes a pinion attached to the front end of the rotating shaft 21.
The bearing box 34 is a metal disk having a constricted portion 37 formed at the center, and a rib 38 provided on the inner surface of the main body housing 7 is fitted into the constricted portion 37, so that the bearing box 34 moves in the front-rear direction. Is held by the main body housing 7 in a regulated state. On the front and rear surfaces of the bearing box 34, heat sink recesses 39 are respectively formed.
Further, a ring wall 40 having a male screw portion formed on the outer periphery thereof is projected forward from the front peripheral edge of the bearing box 34, and the hammer case 10 is coupled to the ring wall 40.

The hammer case 10 is a metal cylindrical body in which the front half portion is tapered and the front tubular portion 41 is formed. The female screw portion formed on the inner periphery of the rear end is screwed into the male screw portion of the ring wall 40. Thus, the rear portion is closed by the bearing box 34. A protrusion 42 is formed on the lower surface of the hammer case 10, and in the assembled state, holding ribs 43 and 43 (FIGS. 5 and 6) protruding from the inner surfaces of the left and right half housings 7a and 7b are respectively provided on the protrusion 42. It comes in contact with the side. In addition, a large-diameter portion 44 is formed over the entire circumference at the rear portion of the hammer case 10 and can be fitted into a recess 45 that is recessed half by one on the inner surfaces of the half housings 7a and 7b. A concave groove 46 (FIGS. 5 and 6) directed forward is connected to each concave portion 45, and a protrusion (not shown) provided on the left and right side surfaces of the hammer case 10 can be engaged with the concave groove 46. It has become. The rotation of the hammer case 10 is restricted by the engagement between the protrusion 42 and the pressing rib 43 and the protrusion and the groove 46.
Further, a resin cover 47 is provided in front of the main body housing 7 so as to cover from the front portion of the hammer case 10 to the front tube portion 41, and a rubber bumper 48 is attached to the front end of the cover 47.

  A bearing 49 is held at the front of the bearing box 34, and the rear end of the spindle 11 is pivotally supported by the bearing 49. This spindle 11 has a hollow and disk-shaped carrier part 50 at the rear part, and a plurality of planetary gears 51 and 51 are pivotally supported on the carrier part 50, and in a bottomed hole 52 formed in the axial center from the rear surface, The front end of the rotating shaft 21 and the pinion 36 are protruded. A resin internal gear 53 with which the planetary gear 51 meshes is provided inside the ring wall 40 of the bearing box 34. The continuous portion 54 provided continuously to the outside of the front portion of the internal gear 53 is fitted in the concave portion 55 provided in the inner peripheral surface of the hammer case 10 so as to be sandwiched between the ring wall 40 in the front-rear direction. At the same time, the internal gear 53 is prevented from rotating and restricted in movement in the axial direction by being fitted to the inner peripheral surface of the recess 55 in an uneven shape (not shown).

  The striking mechanism 12 includes a hammer 56 mounted on the spindle 11, a coil spring 57 that biases the hammer 56 forward, and balls 58 and 58 that are fitted between the spindle 11 and the hammer 56. including. First, the hammer 56 has a pair of claws (not shown) on the front surface. The outer cam grooves 59, 59 formed on the inner surface are fitted to the balls 58, 58, and the ring-shaped groove 60 formed on the rear surface is inserted into the coil spring 57. The front end is inserted. The rear end of the coil spring 57 is in contact with the front surface of the carrier unit 50. Inner cam grooves 61 and 61 are formed on the surface of the spindle 11, and the balls 58 and 58 are fitted between the outer cam grooves 59 and 59 of the hammer 56. The bottomed hole 52 of the spindle 11 is formed with a communication passage 62 in the diameter direction that opens to the inner peripheral surface of the hammer 56, and the grease in the bottomed hole 52 is connected to the outer peripheral surface of the spindle 11 via the communication passage 62. Supply between the inner peripheral surface of the hammer 56 is possible. A small-diameter portion 63 is formed at the front end of the spindle 11, and a through passage 64 penetrating from the bottomed hole 52 to the small-diameter portion 63 is formed at the shaft center.

The anvil 4 is pivotally supported by a bearing 65 held by the front cylinder portion 41 of the hammer case 10, and a pair of arms 66 and 66 that engage with the claw of the hammer 56 in the rotational direction are formed at the rear end. Yes. A ring-shaped holding portion 67 is formed on the rear surface of the front cylinder portion 41 in front of the arm 66, and a resin anvil washer 68 that receives the arm 66 is fitted to the outside of the holding portion 67.
Further, a bottomed hole 69 is formed in the rear axis of the anvil 4, and a small diameter portion 63 of the spindle 11 is coaxially inserted into the bottom hole 69, and a through passage is formed between the bottom diameter hole 63 and the small diameter portion 63 of the bottomed hole 69. The grease can be supplied via 64. On the other hand, an insertion hole 70 for receiving a bit (not shown) is formed in the front axis of the anvil 4, and a front end of the anvil 4 includes a ball 71 and a sleeve 72 that prevent the bit inserted into the insertion hole 70 from coming off. A chuck mechanism is provided.

On the other hand, at the upper part of the handle 3, a switch 73 with a trigger 74 protruding forward is provided, and a forward / reverse switching button 75 of the brushless motor 8 is provided. Above the trigger 74, the main body housing 7 is formed with an extending portion 76 that covers the lower surface of the hammer case 11 and protrudes forward from the trigger 74. Illuminating LEDs 77 and 77 are provided obliquely upward.
The mounting portion 5 accommodates a control circuit board 78 that is held by a dish-like case 79 and on which a switching element for controlling the brushless motor 8 and a microcomputer are mounted. The control circuit board 78 is provided with a switch panel 80 having a hitting force switching button, a battery remaining capacity display lamp, and the like, and is exposed through a window 81 provided in the front portion of the mounting portion 5. A strap 82 is provided at the rear portion of the mounting portion 5, and one end of a hanging hook 83 having a U-shape in front view is fixed to the left side by a screw 84.

  The battery pack 6 serving as a sliding element is fitted with slide rails 86, 86 provided on the left and right sides of the upper surface of the battery pack 6 between the guide rails 85, 85 provided on the left and right sides of the lower end of the mounting portion 5, to the rear. By sliding, it is coupled to the mounting portion 5. Together with this connection, the terminal plate of the terminal block 87 provided in the mounting portion 5 is electrically connected to the terminal on the battery pack 5 side. Reference numeral 88 denotes a hook that is locked to the mounting portion 5 to prevent the battery pack 6 from being detached, and 89 is a release button for releasing the hook 88 when the battery pack 6 is removed.

  FIG. 5 shows the right half housing 7b, and FIG. 6 shows the left half housing 7a. These half housings 7a and 7b are molded products of resin (here, nylon 6 (PA6)). The outer surface is coated 90 and partially covered with elastomers 91, 91... (Hatched portions) as soft materials. First, as shown in FIG. 7, the coating 90 is applied to the surface of the molded half housings 7a and 7b with a base material (adhesion imparting agent (polarity conversion agent) that matches the resin material and the paint of the half housings 7a and 7b). ) After applying 92, a metallic paint 93 containing a metal powder such as aluminum is applied to the urethane paint by spraying, etc., and a top coat (here, urethane-based normal temperature curing) which becomes an insulating coating on the surface of the metallic paint 93 Type) 94, and the film thickness T of the coating 90 is 0.1 mm. 95 is a through-hole of the forward / reverse switching button 75, and 96 is an irradiation window of the LED 77, and the coating 90 is not applied together with the air inlet 33, but in the half housing 7 b, the bosses 97, 97. A coating 90 is applied to the outer surface. Thereby, even if it is an electric tool with big vibration etc., the screw 13 becomes difficult to loosen.

  The volume content of the metal powder in the metallic paint 93 is preferably 50% or less, more preferably 30% or less in order to prevent dielectric breakdown due to external electric shock. By this coating 90 (metallic coating), a metallic luster is obtained on the surface of the main body housing 7 in addition to the coloring of blue or the like. In addition to the purpose of increasing the adhesion between the metallic paint 93 and the resin material of the housing, the base material 92 can also prevent the base color of the resin material from appearing by selecting the color. In addition, if the coating 90 and the resin material of the main body housing 7 are made the same color, even if the coating 90 is peeled off, it becomes difficult to stand out. For the same purpose, if the colors of the base material 92 and the metallic paint 93 are similar colors, the peeling is less noticeable.

However, this coating 90 is not the entire outer surface of the half housings 7a and 7b, but the portion shown in the dotted line in FIGS. 5 and 6, that is, the coupling surface with the rear cover 9 including the boss 98 for screwing with the screw 27. (Outer surface and rear surface) 99 is not applied. This is because the dimensional accuracy is ensured and the main body housing 7 and the rear cover 9 are coupled without rattling.
In addition, the coating 90 is not applied to the back surfaces (inner surfaces) of the half housings 7a and 7b. However, the portions shown by the dotted lines (the mating surface 100 at the periphery of the half housings 7a and 7b, the bosses 97 and 97 for screw connection) Dimensional accuracy on the mating surfaces, the assembly surface 101 of the stator 14 of the brushless motor 8 (including the rib 20), the concave portion 45 and the concave groove 46 in which the hammer case 10 is assembled, the rib 38, and the assembly portion 102 of the terminal block 87) In order to ensure the above, masking is performed when applying the coating 90 so that metallic paint or the like does not adhere.
Further, here, the lower surface peripheral portion 103 including the guide rail 85 also serves as a sliding support portion when the battery pack 6 is attached and detached, so that the dimensional accuracy is maintained and good slidability is ensured. When applying the coating 90, masking is performed so that metallic paint or the like does not adhere.
In addition, since the paint is not applied to the trigger sliding area which can be brought into contact with the trigger, which is necessary for the electric power tool, the paint is not scraped off by the sliding of the trigger. Therefore, the paint does not adhere to the trigger and the usability is improved.

  After coating the necessary portions 90 in this way, the half housings 7a and 7b are fitted into the secondary mold, and the elastomer 91 is secondarily formed in the hatched portions shown in FIGS. As shown, the half housings 7a and 7b in which the surface of the coating 90 is partially covered with the elastomer 91 are obtained. In the half housing 7a on the left side, printing 104, 104, etc. such as a company name logo is applied to the surface of the coating 90 (FIG. 7).

  In this way, by forming the elastomer 91 on the surface of the coating 90, if a material having a good compatibility with the coating 90 is selected as compared with the case of forming the elastomer 91 directly on the resin, a polarity conversion agent is not used. Even high adhesion can be obtained. However, when the elastomer 91 is secondarily formed after the coating 90 is applied, if the coating 90 has a large film thickness, the existing secondary mold cannot be used, or the coating 90 is not suitable for fitting into the secondary mold. Since there is a possibility of scraping, the film thickness T of the coating 90 is 0.4 mm or less, preferably 0.2 mm or 0.1 mm.

  Similarly, in the rear cover 9, as shown in FIG. 9, coating 90 is applied to the outer back surface and the peripheral surface including the screwed portion by the screw 27, and the hatched portion is covered with an elastomer 91. ing. The secondary forming process of the coating 90 and the elastomer 91 is the same as that of the half housings 7a and 7b. Here, the coating 90 is applied only on the rear surface and the peripheral surface of the rear cover 9, and the coating 90 is applied on the front surface (inner surface). Not. In particular, in order to ensure dimensional accuracy, a portion indicated by stippling, that is, an outer peripheral portion 105 coupled with the main body housing 7, a screwing portion 106 with which the boss 98 of the main body housing 7 abuts, and a bearing holding portion 28 are included. The entire inner surface is masked so that metallic paint or the like does not adhere to it. Here too, the surface 104 of the coating 90 on the back side is provided with printing 104 indicating a brushless motor (BL). Even in this rear cover 9, if the paint 90 including the base material 92 and the resin material of the rear cover 9 are of similar colors, even if the paint 90 is peeled off, the paint becomes inconspicuous.

  In the impact driver 1 configured as described above, when the trigger 74 is pushed in with a hand holding the handle 3, the switch 73 is turned on and the brushless motor 8 is driven by the power supply of the battery pack 6. That is, the microcomputer of the control circuit board 78 obtains the rotation detection signal indicating the position of the sensor permanent magnet 24 of the rotor 15 output from the rotation detection element of the sensor circuit board 25 to obtain the rotation state of the rotor 15 and obtain The rotor 15 is rotated by controlling ON / OFF of each switching element in accordance with the rotated state, and by causing a current to flow sequentially to each coil 19 of the stator 14. Therefore, the rotating shaft 21 rotates to cause the planetary gear 51 of the carrier unit 50 to perform a planetary motion, so that the spindle 11 rotates at a reduced speed and the hammer 56 is rotated via the ball 58. It is possible to tighten a screw or the like with a bit mounted in a rotating manner. Further, when the switch 73 is turned on, the control circuit board 78 turns on the LED 77 to irradiate the front of the anvil 4.

  When the tightening progresses and the torque of the anvil 4 increases, the hammer 56 moves backward while rolling the ball 58 along the inner cam groove 61 against the bias of the coil spring 57. When the claw is released from the arm 66, the hammer 58 moves forward by rotating the ball 58 forward along the inner cam groove 61 by the bias of the coil spring 57, and the claw is re-engaged with the arm 66. In this way, a rotating impact force (impact) is generated on the anvil 4. Further tightening is performed by intermittently repeating this impact.

  Thus, according to the impact driver 1 of the said form, it is given to the outer surface of the brushless motor 8, the resin-made main body housing 7 and the rear cover 9 which accommodates the brushless motor 8, and the main body housing 7 and the rear cover 9, and metal powder. The paint 90 containing the switch 90 and the switch 73 for starting the brushless motor 8 can provide a metallic luster feeling even with the resin-made main body housing 7, and is excellent in design. It will be.

Moreover, since the volume content rate of the metal powder in the metallic paint 93 of the coating 90 is 50% or less, it is possible to prevent dielectric breakdown due to external electric shock in addition to the improvement in design.
Furthermore, since the top coat 94, which is an insulating coating, is applied to the surface of the coating 90, the insulating performance is further improved.

In the above embodiment, the top coat is applied to the surface of the coating, but the top coat can be omitted if the desired insulation performance can be obtained only by the volume content of the metal powder of the metallic paint.
Further, the insulating coating is not limited to the case where it is applied to the surface of the paint, and the insulating coating can be applied to the surface of the metal powder. In this case, since metal powder does not contact, insulation can be improved more.
Furthermore, the present invention can be applied not only to the impact driver but also to other electric tools such as an impact wrench, a marnoco, and a driver drill. Therefore, the range of coating and the area covered by the elastomer can be changed as appropriate according to the type of tool, etc., and metallic on the hammer case cover and battery pack (outer surface excluding the connecting part) Application using paint can be performed. In particular, since the battery pack is provided with terminals to which the voltage from the battery cells is applied, it is effective to perform coating with high insulation as in the present invention.
In addition, a portion such as a character to be printed may be formed in a convex shape. Moreover, it is possible to apply the said coating to a convex part. It is also possible to apply the coating to a switch panel which is a separate member from the housing. In this case, for example, the visibility can be increased even in a dark place.

On the other hand, from the above configuration, a motor having a rotation shaft (brushless motor 8), a resin housing (main body housing 7 and rear cover 9) that accommodates the brushless motor 8, a bearing 29 that supports the rotation shaft 21, and a rear cover. And a bearing holding portion 28 that holds the bearing 29, and the invention covers a power tool (impact driver 1) in which a portion of the rear cover 9 excluding the bearing holding portion 28 is coated 90. it can.
According to the present invention, the design can be improved by painting, but since the bearing holding portion 28 is not coated, the dimensional accuracy of the bearing holding portion 28 can be ensured.
The present invention can be applied to other power tools such as an air nailing machine and an air tacker using an air motor, in addition to other electric tools such as an impact wrench, marnoco, and driver drill (the motor is not limited to brushless). And painting is not limited to metallic painting. The housing includes a case where the main body housing and the rear cover are integrated, and the location of the bearing holding portion can be appropriately changed according to the type of tool.

Further, from the above configuration, a motor having a rotating shaft (brushless motor 8), a resin main body housing 7 accommodating the brushless motor 8, and a sliding element (battery pack 6) slidable with respect to the main body housing 7 ) And a sliding support portion (lower surface peripheral edge portion 103 including the guide rail 85) formed on the main body housing 7 and supporting the battery pack 6, and paints on a part of the main body housing 7 excluding the guide rail 85. The invention of the impact driver 1 subjected to 90 can be grasped.
According to the present invention, the design can be improved by painting, while the guide rail 85 is not painted, so that the dimensional accuracy can be maintained and good slidability of the battery pack 6 can be secured.
The present invention can also be applied to other power tools such as an air nailing machine using an air motor and an air tacker, as well as other electric tools such as impact wrench, marnoco and driver drill (motor is not limited to brushless). And painting is not limited to metallic painting. Further, the sliding element is not limited to the battery pack, and may be a dust collector or the like that is slidably mounted on the housing.

Further, from the above embodiment, the brushless motor 8, the resin main body housing 7 that accommodates the brushless motor 8, the coating 90 applied to at least a part of the surface of the main body housing 7, and a part of the coating 90 are covered. It is possible to capture the invention of the impact driver 1 including a soft material (elastomer 91) that has a coating film thickness of 0.4 mm or less.
According to the present invention, the design can be improved by painting. On the other hand, when the elastomer 91 is secondarily molded, the existing secondary mold can be used even if the coating 90 is present, and is fitted to the secondary mold. There is also no risk of the paint 90 being scraped.
The present invention can also be applied to other power tools such as an air nailing machine using an air motor and an air tacker, as well as other electric tools such as impact wrench, marnoco and driver drill (motor is not limited to brushless). And painting is not limited to metallic painting. The base agent and top coat can also be omitted.

Further, from the above configuration, the brushless motor 8, the resin main body housing 7 that houses the brushless motor 8, the base material 92 applied to at least a part of the surface of the main body housing 7, and the surface of the base material 92 The invention of the impact driver 1 including the coating 90 to be applied can be captured.
According to the present invention, the design can be improved by painting, and the adhesion between the resin material of the main body housing 7 and the coating 90 can be improved by the base agent 92.
The present invention can also be applied to other power tools such as an air nailing machine using an air motor and an air tacker, as well as other electric tools such as impact wrench, marnoco and driver drill (motor is not limited to brushless). And painting is not limited to metallic painting. Top coats and soft materials can also be omitted.

Further, from the above embodiment, the brushless motor 8, the resin main body housing 7 that houses the brushless motor 8, the coating 90 applied to at least a part of the surface of the main body housing 7, and the coating 90 The invention of the impact driver 1 including the base material (top coat 94) can be captured.
According to the present invention, the design can be improved by painting, and the coating 90 can be protected by the top coat 94. Furthermore, the adhesion when the surface is covered with a soft material such as elastomer is also increased.
The present invention can also be applied to other power tools such as an air nailing machine using an air motor and an air tacker, as well as other electric tools such as impact wrench, marnoco and driver drill (motor is not limited to brushless). And painting is not limited to metallic painting. When there is a base agent as in the previous embodiment, it is desirable that the base agent and the paint have the same color, but the base agent and the soft material can be omitted.

In addition, the embodiment includes a brushless motor 8, a resin main body housing 7 that houses the brushless motor 8, and a coating 90 that is applied to at least a part of the surface of the main body housing 7. The invention of the impact driver 1 in which the color and the color of the paint 90 are similar colors can be captured.
According to the present invention, the design can be improved by painting, and even if the coating 90 is peeled off, the peeling is less noticeable depending on the color of the underlying resin.
The present invention can also be applied to other power tools such as an air nailing machine using an air motor and an air tacker, as well as other electric tools such as impact wrench, marnoco and driver drill (motor is not limited to brushless). And painting is not limited to metallic painting. A base agent, a top coat, and a soft material can also be omitted.

Further, from the above configuration, the resin main body housing 7, the covering material (top coat 94) applied to at least part of the surface of the main body housing 7, and at least part of the surface of the top coat 94 are applied. The invention of the electric device (impact driver 1) including the print 104 can also be grasped.
According to the present invention, the design can be improved by printing, and the compatibility between the top coat 94 and the print 104 is improved compared with the direct printing on the resin, so that the phenomenon in which the print 104 is rubbed and peeled off hardly occurs. Become.
The present invention is not limited to other electric tools (motor is not limited to brushless) such as impact wrench, marnoco and driver drill, other power tools such as air nailer and air tacker using an air motor, dust collector and cleaner. It can also be applied to electrical equipment such as blowers. It is also possible to print on the surface of the paint without the top coat.

Moreover, from the said form, invention of the electric equipment (impact driver 1) containing the resin-made main body housing 7 and the coating 90 given to at least one part of the main body housing 7 and containing metal powder can also be caught. it can.
According to this invention, even if it is the resin-made main body housing 7, a metallic luster feeling is obtained and it becomes what was excellent in design property.
The present invention also includes other power tools such as an impact wrench, marnoco, and driver drill (the motor is not limited to brushless), other power tools such as an air nailer and air tacker using an air motor, a dust collector and a cleaner. It can also be applied to electrical equipment such as blowers. A base agent, a top coat, and a soft material can also be omitted. Non-metallic powders can also be used for coating.

In addition, in the above embodiment, printing is performed on the surface of the top coat. However, as shown in FIG. 10, printing 104 is performed on the surface of the metallic paint 93 and a top coating agent (top coating 94) is applied on the printing 104. You can also. This invention can also be applied to electrical equipment.
In this way, the design can be improved by the printing 104, and in addition, the printing 104 is protected by the top coat 94, and there is no possibility that the printing 104 is rubbed and peeled off.
In common with each invention, the resin material of the housing is not limited to nylon, but may be other resins such as polycarbonate. The form of the housing is not limited to the structure divided into right and left.
In the said form, the coating using a metal powder is performed. However, even if it is not a metal powder, for example, mica (mica) which is a non-metal powder can be used. When mica is used in this way, the mica itself transmits a predetermined amount of light and reflects a predetermined amount of light, so that a predetermined amount of light can be reflected in the thickness direction of the coating, and a deep gloss can be obtained. . When metal powder is used, the gloss does not become deep, but the gloss can be more metallic.
The metal powder and nonmetal powder of the present invention may be referred to as a bright pigment. On the other hand, the urethane paint of the present invention is sometimes referred to as a non-brilliant colored pigment and acts as a colorant.

In some cases, a metal oxide, a metal sulfide, or the like is used in the coating itself to develop a color such as red or white. However, these metal oxides, metal sulfides, and the like are different from the present invention because they do not have a certain reflectance and are not glossy.
Moreover, the diameter of such metal oxide, metal sulfide, etc. is about 0.1 μm to 1 μm. On the other hand, the metal powder and non-metal powder of the present invention can have any shape and the like, but the diameter is, for example, about 100 μm, so that the diameter differs. The metal terminal or non-metallic powder can be a scaly or granular material.

  1. ・ Impact driver, 2. ・ Main body, 3. ・ Handle, 4. ・ Anvil, 5. ・ Mounting part, 6. ・ Battery pack, 7. ・ Main body housing, 7a, 7b ・ ・ Half housing, 8. ・· Brushless motor, 9 · · Rear cover, 10 · · Hammer case, 11 · · Spindle, 12 · · Blow mechanism, 21 · · Rotating shaft, 28 · · Bearing holder, 56 · · Hammer, 57 · · Coil spring, 85 ··· Guide rail, 90 ·· Paint, 91 ·· Elastomer, 92 ·· Base agent, 93 ·· Metallic paint, 94 ·· Top coat, T ·· Film thickness.

Claims (10)

An electric motor;
A resin housing for housing the electric motor;
A coating applied to at least a portion of the housing and containing a metal powder;
An electric tool comprising: a switch for starting the electric motor. An electric motor;
A resin housing for housing the electric motor;
A coating applied to at least a portion of the housing and containing a metal powder;
A switch for starting the electric motor,
The electric power tool characterized in that the volume content of the metal powder in the coating is 50% or less.   The electric tool according to claim 1, wherein an insulating coating is applied to a surface of the paint.   The electric tool according to claim 1 or 2, wherein an insulating coating is applied to a surface of the metal powder. A motor having a rotating shaft;
A resin housing for housing the motor;
A bearing that supports the rotating shaft;
A bearing holding portion formed on the housing and holding the bearing,
A power tool, wherein at least a part of the housing excluding the bearing holding portion is coated. A motor having a rotating shaft;
A resin housing for housing the motor;
A sliding element slidable relative to the housing;
A sliding support portion formed on the housing and supporting the sliding element,
A power tool, wherein at least a part of the housing excluding the sliding support portion is coated. A motor,
A resin housing for housing the motor;
Paint applied to at least a portion of the surface of the housing;
A soft material covering at least a part of the paint,
A power tool characterized in that the coating thickness is 0.4 mm or less. A motor,
A resin housing for housing the motor;
A base material applied to at least a part of the surface of the housing;
And a coating applied to at least a part of the surface of the base agent. A motor,
A resin housing for housing the motor;
A coating applied to at least a portion of the surface of the housing;
A power tool comprising an upper coating applied to at least a part of the coating. A motor,
A resin housing for housing the motor;
A coating applied to at least a part of the surface of the housing,
A power tool characterized in that the color of the housing and the color of the paint are similar colors.

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