Power Tools

Abstract

To provide a technology of preventing poor appearance of an electric tool in order to solve a problem in a housing of an electric tool which is manufactured often by injection molding and in which when sink is generated, poor appearance of the electric tool may occur.SOLUTION: An electric tool includes a motor, an output unit that is driven by the motor, a housing made of a synthetic resin and including a motor accommodation part that accommodates the motor; a recess provided in a label area defined in a part of an outer surface of the housing; and a label attached to the label area. By providing the recess in the outer surface of the housing, mold shrinkage of the housing is improved, and sink generation is suppressed. The label is attached to the label area so as to hide the recess. As a result, poor appearance of the electric tool is prevented.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The technology disclosed in this specification relates to power tools. [Background technology]

[0002] Synthetic resin products are often manufactured by injection molding. In injection molding, heated and molten synthetic resin is injected into a mold. Due to molding shrinkage, a phenomenon may occur in which the surface of the product becomes dented or distorted. This phenomenon is called sink marks. Patent Document 1 discloses an example of a technology for suppressing the occurrence of sink marks. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 8-72588 Summary of the Invention [Problem to be solved by the invention]

[0004] The housing of a power tool is often manufactured by injection molding, and if a sink mark occurs in the housing, it may cause a defective appearance of the power tool.

[0005] The technology disclosed in this specification aims to prevent defects in the appearance of power tools. [Means for solving the problem]

[0006] This specification discloses a power tool. The power tool may include a motor, an output unit driven by the motor, and a housing made of synthetic resin including a motor housing portion for housing the motor. The power tool may include a recess provided in a label area defined in a portion of an outer surface of the housing. The power tool may include a label attached to the label area. Effect of the Invention

[0007] According to the technology disclosed in this specification, poor appearance of the power tool is suppressed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a power tool according to a first embodiment. [Diagram 2] FIG. 2 is a side view showing the power tool according to the first embodiment. [Diagram 3] FIG. 3 is a front view showing an upper portion of the power tool according to the first embodiment. [Figure 4] FIG. 4 is a plan view showing an upper portion of the power tool according to the first embodiment. [Diagram 5] FIG. 5 is a vertical cross-sectional view showing the power tool according to the first embodiment. [Figure 6] FIG. 6 is a vertical cross-sectional view showing an upper portion of the power tool according to the first embodiment. [Figure 7] FIG. 7 is a cross-sectional view showing an upper portion of the power tool according to the first embodiment. [Figure 8] FIG. 8 is a partially exploded perspective view of the power tool according to the first embodiment. [Figure 9] FIG. 9 is a perspective view showing a part of the outer surface of the right housing according to the first embodiment. [Figure 10] FIG. 10 is a perspective view showing a part of the inner surface of the right housing according to the first embodiment. [Figure 11] FIG. 11 is a cross-sectional view showing a part of the right housing according to the first embodiment. [Figure 12] FIG. 12 is a perspective view showing a recess according to the first embodiment. [Figure 13] FIG. 13 is a perspective view showing a recess according to a modified example of the first embodiment. [Figure 14] FIG. 14 is a perspective view showing a recess according to a modified example of the first embodiment. [Figure 15] FIG. 15 is a perspective view showing a recess according to a modified example of the first embodiment. [Figure 16]FIG. 16 is a cross-sectional view illustrating a schematic view of a part of a right housing according to a modified example of the first embodiment. [Figure 17] FIG. 17 is a perspective view showing a power tool according to the second embodiment. [Figure 18] FIG. 18 is a vertical cross-sectional view showing a power tool according to the second embodiment. [Figure 19] FIG. 19 is a cross-sectional view showing a power tool according to the second embodiment. [Figure 20] FIG. 20 is a perspective view showing a label area and a label according to the second embodiment. [Figure 21] FIG. 21 is a perspective view showing the vicinity of the label area according to the second embodiment. [Figure 22] FIG. 22 is a perspective view showing a power tool according to the third embodiment. [Figure 23] FIG. 23 is a vertical sectional view showing a power tool according to a third embodiment. [Figure 24] FIG. 24 is a cross-sectional view showing a power tool according to a third embodiment. [Diagram 25] FIG. 25 is a perspective view showing a label area and a label according to the third embodiment. [Figure 26] FIG. 26 is a perspective view showing the vicinity of the label area according to the third embodiment. [Figure 27] FIG. 27 is a perspective view showing a power tool according to the fourth embodiment. [Figure 28] FIG. 28 is a vertical sectional view showing a power tool according to a fourth embodiment. [Figure 29] FIG. 29 is a cross-sectional view showing a power tool according to a fourth embodiment. [Diagram 30] FIG. 30 is a perspective view showing a label area and a label according to the fourth embodiment. [Diagram 31] FIG. 31 is a perspective view showing the vicinity of the label area according to the fourth embodiment. [Diagram 32] FIG. 32 is a perspective view showing a power tool according to the fifth embodiment. [Diagram 33]FIG. 33 is a cross-sectional view showing a power tool according to a fifth embodiment. [Diagram 34] FIG. 34 is a perspective view showing a label area and a label according to the fifth embodiment. [Diagram 35] FIG. 35 is a perspective view showing the vicinity of the label area according to the fifth embodiment. [Diagram 36] FIG. 36 is a perspective view showing a power tool according to the sixth embodiment. [Figure 37] FIG. 37 is a cross-sectional view showing a power tool according to the sixth embodiment. [Figure 38] FIG. 38 is a perspective view showing a label area and a label according to the sixth embodiment. [Figure 39] FIG. 39 is a perspective view showing the vicinity of the label area according to the sixth embodiment. [Diagram 40] FIG. 40 is a perspective view showing a power tool according to the seventh embodiment. [Diagram 41] FIG. 41 is a cross-sectional view showing a power tool according to the seventh embodiment. [Diagram 42] FIG. 42 is a perspective view showing a label area and a label according to the seventh embodiment. [Diagram 43] FIG. 43 is a perspective view showing the vicinity of the label area according to the seventh embodiment. [Diagram 44] FIG. 44 is a perspective view showing a power tool according to the eighth embodiment. [Diagram 45] FIG. 45 is a vertical sectional view showing a power tool according to the eighth embodiment. [Diagram 46] FIG. 46 is a cross-sectional view showing a power tool according to the eighth embodiment. [Figure 47] FIG. 47 is a perspective view showing a label area and a label according to the eighth embodiment. [Figure 48] FIG. 48 is a perspective view showing the vicinity of the label area according to the eighth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In one or more embodiments, the power tool may include a motor, an output section driven by the motor, and a housing made of synthetic resin including a motor housing section for housing the motor. The power tool may include a recess provided in a label area defined in a portion of an outer surface of the housing. The power tool may include a label attached to the label area.

[0010] In the above configuration, by providing a recess on the outer surface of the housing, molding shrinkage of the housing is improved and the occurrence of sink marks is suppressed. Since the recess is provided in the label area, the occurrence of sink marks in the label area is suppressed. Since the label is affixed to the label area where the occurrence of sink marks is suppressed, distortion of the label is suppressed. Therefore, poor appearance of the label is suppressed and the worker can correctly read the data printed on the label. Furthermore, the label is affixed to the label area so as to hide the recess. Therefore, poor appearance of the power tool is suppressed.

[0011] In one or more embodiments, the recesses may be provided in a plurality of spaced apart locations in the label area.

[0012] The above configuration effectively prevents the occurrence of sink marks. In addition, the size of the opening of each recess can be reduced, so when a label is attached to the label area, the label is prevented from falling into the recess. The label is attached to the label area with reduced distortion.

[0013] In one or more embodiments, the housing may include a thinned portion and a thickened portion that is thicker than the thickness of the thinned portion. The label area may be defined to include an outer surface of the thinned portion and an outer surface of the thickened portion.

[0014] In the above configuration, the label area can be defined in any area of ​​the outer surface of the housing.

[0015] In one or more embodiments, the recess may be provided in an outer surface of the thickened portion.

[0016] With the above configuration, the occurrence of sink marks is effectively suppressed.

[0017] In one or more embodiments, recesses may be formed in each of the outer surfaces of the thin portion and the thick portion. The number of recesses formed in the outer surface of the thick portion may be greater than the number of recesses formed in the outer surface of the thin portion.

[0018] In the above configuration, the number of recesses formed on the outer surface of the thick-walled portion is greater than the number of recesses formed on the outer surface of the thin-walled portion, thereby effectively improving molding shrinkage of the housing and suppressing the occurrence of sink marks.

[0019] In one or more embodiments, a recess may be formed in each of the outer surfaces of the thin portion and the thick portion, and the depth of the recess formed in the outer surface of the thick portion may be greater than the depth of the recess formed in the outer surface of the thin portion.

[0020] In the above configuration, the depth of the recess formed in the outer surface of the thick-walled portion is deeper than the depth of the recess formed in the outer surface of the thin-walled portion, thereby effectively improving molding shrinkage of the housing and suppressing the occurrence of sink marks.

[0021] In one or more embodiments, a recess may be formed in each of the outer surfaces of the thin portion and the thick portion, and an area of ​​an opening of the recess formed in the outer surface of the thick portion may be larger than an area of ​​an opening of the recess formed in the outer surface of the thin portion.

[0022] In the above configuration, the area of ​​the opening of the recess formed in the outer surface of the thick-walled portion is larger than the area of ​​the opening of the recess formed in the outer surface of the thin-walled portion, thereby effectively improving molding shrinkage of the housing and suppressing the occurrence of sink marks.

[0023] In one or more embodiments, the housing may have a protrusion protruding from an inner surface of the housing. The protrusion may include a first portion and a second portion protruding from the first portion. The thin portion may include the first portion. The thicker portion may include the second portion.

[0024] With the above configuration, when the protrusion itself has a plurality of portions with different thicknesses, the occurrence of sink marks is effectively suppressed.

[0025] In one or more embodiments, the housing may have a protrusion protruding from an inner surface of the housing. The thickened portion may include a protrusion.

[0026] With the above-described configuration, when the housing has a plurality of portions with different thicknesses, the occurrence of sink marks is effectively suppressed.

[0027] In one or more embodiments, the protrusion may be provided so as to extend in a first direction. The recess may be provided in a plurality of portions spaced apart from each other in the first direction.

[0028] In the above configuration, when the protruding portion is provided so as to extend in the first direction, the recessed portions are provided at intervals in the first direction, whereby the occurrence of sink marks is effectively suppressed.

[0029] In one or more embodiments, the protrusions may be provided in a plurality in a second direction perpendicular to the first direction, and the recesses may be provided in a plurality at intervals in the second direction.

[0030] In the above configuration, when a plurality of protruding portions are provided in the second direction, a plurality of recessed portions are provided at intervals in the second direction, whereby the occurrence of sink marks is effectively suppressed.

[0031] In one or more embodiments, the protrusion may support an internal member contained within the housing.

[0032] In the above configuration, the internal member is stably supported by the protrusion.

[0033] In one or more embodiments, the internal member may include a motor.

[0034] In the above configuration, the motor is stably supported by the protrusion.

[0035] In one or more embodiments, the internal member may include a controller that controls the motor.

[0036] In the above configuration, the controller is stably supported by the protrusion.

[0037] In one or more embodiments, the internal member may include a metal case that houses the power transmission mechanism.

[0038] In the above configuration, the case is stably supported by the protrusion.

[0039] In one or more embodiments, the label area may be defined on an exterior surface of the motor housing.

[0040] In the above configuration, the label is attached to the outer surface of the motor housing in a state in which the distortion is reduced, and an operator can visually confirm the label in a state in which the distortion is reduced.

[0041] In one or more embodiments, the motor housing may have a protrusion protruding from an inner surface of the motor housing. The protrusion may support the motor.

[0042] In the above configuration, the motor is stably supported by the protrusion.

[0043] In one or more embodiments, the power tool may include a controller for controlling the motor. The housing may include a controller receiving portion for receiving the controller. The label area may be defined on an outer surface of the controller receiving portion.

[0044] In the above configuration, the label is attached to the outer surface of the controller housing in a state in which the distortion is reduced. An operator can visually confirm the label in which the distortion is reduced.

[0045] In one or more embodiments, the controller housing may have a protrusion protruding from an inner surface of the controller housing. The protrusion may support the controller.

[0046] In the above configuration, the controller is stably supported by the protrusion.

[0047] In one or more embodiments, the power tool may be an impact driver, a hammer drill, a hedge trimmer, a cutter, a circular saw, a grass trimmer, or a grinder.

[0048] With the above configuration, poor appearance of the impact driver, hammer drill, hedge trimmer, cutter, circular saw, grass cutter, or grinder is suppressed.

[0049] In one or more embodiments, the opening of the recess may be circular.

[0050] In the above configuration, the recess is easily formed.

[0051] Hereinafter, an embodiment according to the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiment. The components of the embodiments described below can be appropriately combined. In addition, some components may not be used.

[0052] In the embodiment, the positional relationship of each part is described using the terms "left", "right", "front", "rear", "upper" and "lower". These terms indicate relative positions or directions based on the center of the power tool. The left-right direction and the front-rear direction are perpendicular to each other. The front-rear direction and the up-down direction are perpendicular to each other. The up-down direction and the left-right direction are perpendicular to each other.

[0053] The electric power tool has a motor. In the embodiments, a direction parallel to a rotation axis AX of the motor is referred to as an axial direction, a radial direction of the rotation axis AX of the motor is referred to as a radial direction, and a direction going around the rotation axis AX of the motor is referred to as a circumferential direction or a rotation direction.

[0054] A position or direction on one side in the axial direction will be referred to as "one axial side" as appropriate, and a position or direction on the other side in the axial direction will be referred to as "the other axial side" as appropriate. In the radial direction, a position or direction closer to the motor's rotation shaft AX will be referred to as "the radially inner side" as appropriate, and a position or direction farther from the motor's rotation shaft AX will be referred to as "the radially outer side" as appropriate. A position or direction on one side in the circumferential direction will be referred to as "one circumferential side" as appropriate, and a position or direction on the other circumferential side will be referred to as "the other circumferential side" as appropriate.

[0055] [First embodiment] A first embodiment will be described.

[0056] <Power tools> FIG. 1 is a perspective view of a power tool 1A according to the present embodiment. FIG. 2 is a side view of the power tool 1A according to the present embodiment. FIG. 3 is a front view of an upper portion of the power tool 1A according to the present embodiment. FIG. 4 is a plan view of the upper portion of the power tool 1A according to the present embodiment. FIG. 5 is a vertical cross-sectional view of the power tool 1A according to the present embodiment. FIG. 6 is a vertical cross-sectional view of the upper portion of the power tool 1A according to the present embodiment. FIG. 7 is a cross-sectional view of the upper portion of the power tool 1A according to the present embodiment.

[0057] In this embodiment, the power tool 1A is an impact driver, and includes a housing 2, a rear cover 3, a hammer case 4, a battery mounting section 5, a motor 6, a reduction gear mechanism 7, a spindle 8, a striking mechanism 9, an anvil 10, a chuck sleeve 11, a fan 12, a controller 13, a trigger switch 14, a forward / reverse switching lever 15, an operation panel 16, a mode switching switch 17, and a light 18.

[0058] The housing 2 is made of synthetic resin. In this embodiment, the housing 2 is made of nylon. The housing 2 includes a left housing 2L and a right housing 2R disposed to the right of the left housing 2L. As shown in FIG. 2, the left housing 2L and the right housing 2R are fixed together by a plurality of screws 2S. The housing 2 is composed of a pair of half-split housings.

[0059] The housing 2 includes a motor accommodating portion 21, a grip portion 22, and a controller accommodating portion 23.

[0060] The motor accommodating portion 21 accommodates the motor 6. The motor accommodating portion 21 is cylindrical.

[0061] The grip portion 22 is held by an operator. The grip portion 22 protrudes downward from the motor accommodating portion 21. The trigger switch 14 is provided on an upper portion of the grip portion 22.

[0062] The controller accommodating portion 23 accommodates the controller 13. The controller accommodating portion 23 is connected to a lower end portion of the grip portion 22. The outer dimensions of the controller accommodating portion 23 are larger than the outer dimensions of the grip portion 22 in both the front-rear direction and the left-right direction.

[0063] The rear cover 3 is made of synthetic resin. The rear cover 3 is disposed rearward of the motor accommodating portion 21. The rear cover 3 accommodates at least a portion of the fan 12. The fan 12 is disposed inside the rear cover 3. The rear cover 3 is disposed so as to cover an opening at the rear end of the motor accommodating portion 21. The outer diameter of the rear cover 3 gradually decreases toward the rear.

[0064] The motor accommodating portion 21 has an air intake port 19. The rear cover 3 has an air exhaust port 20. Air in the external space of the housing 2 flows into the internal space of the housing 2 through the air intake port 19. Air in the internal space of the housing 2 flows out to the external space of the housing 2 through the air exhaust port 20.

[0065] The hammer case 4 is made of metal. In this embodiment, the hammer case 4 is made of aluminum. The hammer case 4 is disposed in front of the motor accommodating section 21. The hammer case 4 is connected to the front part of the motor accommodating section 21. The hammer case 4 is cylindrical. The inner diameter of the front part 4F of the hammer case 4 is smaller than the inner diameter of the rear part 4R of the hammer case 4. The rear part of the hammer case 4 is fitted into the inside of the front part of the motor accommodating section 21. It is inserted. The rear part of the hammer case 4 is fitted into the inside of the front part of the motor accommodating section 21. A bearing box 24 is disposed inside the rear part of the hammer case 4. The bearing box 24 is fixed to each of the motor accommodating section 21 and the hammer case 4.

[0066] The hammer case 4 accommodates at least a portion of the reduction mechanism 7, the spindle 8, the striking mechanism 9, and the anvil 10. At least a portion of the reduction mechanism 7 is disposed inside the bearing box 24.

[0067] At least a portion of the hammer case 4 is covered by a hammer case cover 4A. A bumper 4B is disposed on a front portion 4F of the hammer case 4. The bumper 4B is annular.

[0068] The battery mounting section 5 is disposed at the bottom of the controller housing section 23. The battery pack 25 is mounted to the battery mounting section 5. The battery pack 25 is a power source for the power tool 1A. The battery pack 25 is detachable from the battery mounting section 5. The battery pack 25 includes a secondary battery. In this embodiment, the battery pack 25 includes a rechargeable lithium ion battery. When mounted to the battery mounting section 5, the battery pack 25 can supply power to the power tool 1A. The motor 6 is driven based on the power supplied from the battery pack 25. The controller 13 and the operation panel 16 operate based on the power supplied from the battery pack 25.

[0069] The motor 6 is a power source of the power tool 1A. The motor 6 is an inner rotor type brushless motor. The motor 6 has a stator 26 and a rotor 27. At least a portion of the rotor 27 is disposed inside the stator 26. The rotor 27 rotates relative to the stator 26. The rotation axis AX of the motor 6 extends in the front-rear direction. The rotor 27 rotates around the rotation axis AX. The rotor 27 is rotatable inside the stator 26.

[0070] The stator 26 includes a stator core 28 , a front insulator 29 , a rear insulator 30 , and a coil 31 .

[0071] The stator core 28 is disposed radially outward of the rotor 27. The stator core 28 includes a plurality of stacked steel plates. The steel plates are metal plates whose main component is iron. The stator core 28 is cylindrical. The stator core 28 has a plurality of teeth that support the coils 31.

[0072] The front insulator 29 is provided at the front of the stator core 28. The rear insulator 30 is provided at the rear of the stator core 28. The front insulator 29 and the rear insulator 30 are each an electrical insulating member made of synthetic resin. The front insulator 29 is disposed so as to cover a portion of the surface of the teeth. The rear insulator 30 is disposed so as to cover a portion of the surface of the teeth.

[0073] The coil 31 is attached to the stator core 28 via the front insulator 29 and the rear insulator 30. A plurality of coils 31 are arranged. The coils 31 are arranged around the teeth of the stator core 28 via the front insulator 29 and the rear insulator 30. The coils 31 and the stator core 28 are electrically insulated by the front insulator 29 and the rear insulator 30. The multiple coils 31 are connected via fusing terminals 38. The coils 31 are connected to the controller 13 via lead wires (not shown).

[0074] The rotor 27 rotates about a rotation axis AX. The rotor 27 has a core portion 32, a shaft portion 33, a rotor magnet 34, and a sensor magnet 35. The core portion 32 functions as a rotor core of the rotor 27. The shaft portion 33 functions as a rotor shaft of the rotor 27.

[0075] Each of the core portion 32 and the shaft portion 33 is made of steel. The shaft portion 33 protrudes in the front-rear direction from an end face of the core portion 32. The shaft portion 33 includes a front shaft portion 33F protruding forward from the front end face of the core portion 32 and a rear shaft portion 33R protruding rearward from the rear end face of the core portion 32.

[0076] The rotor magnet 34 is fixed to the core portion 32. The rotor magnet 34 is cylindrical. The rotor magnet 34 is disposed around the core portion 32.

[0077] The sensor magnet 35 is fixed to the core portion 32. The sensor magnet 35 is annular. The sensor magnet 35 is disposed on the front end surface of the core portion 32 and the front end surface of the rotor magnet .

[0078] A sensor board 37 is attached to the front insulator 29. The sensor board 37 is fixed to the front insulator 29 with screws 29S. The sensor board 37 has a disk-shaped circuit board with a hole in the center, and a rotation detection element 37S supported by the circuit board. At least a portion of the sensor board 37 faces the sensor magnet 35. The rotation detection element detects the position of the sensor magnet 35 of the rotor 27, thereby detecting the position of the rotor 27 in the rotational direction.

[0079] The shaft portion 33 is rotatably supported by a rotor bearing 39. The rotor bearing 39 includes a front rotor bearing 39F that rotatably supports the front shaft portion 33F, and a rear rotor bearing 39R that rotatably supports the rear shaft portion 33R.

[0080] The front rotor bearing 39F is held in the bearing box 24. The bearing box 24 has a recess 24A recessed forward from the rear surface of the bearing box 24. The front rotor bearing 39F is disposed in the recess 24A. The rear rotor bearing 39R is held in the rear cover 3. The front end of the front shaft portion 33F is disposed in the internal space of the hammer case 4 through an opening in the bearing box 24.

[0081] A pinion gear 41 is formed on the front end of the front shaft portion 33F. The pinion gear 41 is connected to at least a part of the reduction gear mechanism 7. The front shaft portion 33F is connected to the reduction gear mechanism 7 via the pinion gear 41.

[0082] The reduction mechanism 7 is disposed forward of the motor 6. The reduction mechanism 7 connects the front shaft portion 33F and the spindle 8. The reduction mechanism 7 transmits the rotation of the rotor 27 to the spindle 8. The reduction mechanism 7 rotates the spindle 8 at a rotation speed lower than the rotation speed of the front shaft portion 33F. The reduction mechanism 7 includes a planetary gear mechanism.

[0083] The reduction mechanism 7 has a plurality of gears. The gears of the reduction mechanism 7 are driven by a rotor 27.

[0084] The reduction mechanism 7 has a plurality of planetary gears 42 arranged around the pinion gear 41, and an internal gear 43 arranged around the plurality of planetary gears 42. The pinion gear 41, the planetary gear 42, and the internal gear 43 are each housed in the hammer case 4. Each of the plurality of planetary gears 42 meshes with the pinion gear 41. The planetary gear 42 is rotatably supported by the spindle 8 via a pin 42P. The spindle 8 is rotated by the planetary gear 42. The internal gear 43 has internal teeth that mesh with the planetary gear 42. The internal gear 43 is fixed to the bearing box 24. The internal gear 43 does not rotate relative to the bearing box 24.

[0085] When the front shaft portion 33F is rotated by the drive of the motor 6, the pinion gear 41 rotates and the planetary gear 42 revolves around the pinion gear 41. The planetary gear 42 revolves while meshing with the internal teeth of the internal gear 43. Due to the revolution of the planetary gear 42, the spindle 8 connected to the planetary gear 42 via the pin 42P rotates at a rotational speed lower than the rotational speed of the shaft portion 33.

[0086] The spindle 8 is disposed forward of at least a portion of the motor 6. The spindle 8 is disposed forward of the stator 26. At least a portion of the spindle 8 is disposed forward of the rotor 27. At least a portion of the spindle 8 is disposed in front of the reduction mechanism 7. The spindle 8 rotates by the rotation of the rotor 27 transmitted by the reduction mechanism 7.

[0087] The spindle 8 has a flange portion 44 and a rod portion 45 protruding forward from the flange portion 44. The planetary gear 42 is rotatably supported on the flange portion 44 via a pin 42P. The rotation axis of the spindle 8 and the rotation axis AX of the motor 6 coincide with each other. The spindle 8 rotates about the rotation axis AX. The spindle 8 is rotatably supported by a spindle bearing 46. A peripheral wall portion 8A is provided at the rear end of the spindle 8 so as to surround the spindle bearing 46. The spindle bearing 46 supports the peripheral wall portion 8A of the spindle 8.

[0088] The bearing box 24 is disposed around at least a portion of the periphery of the spindle 8. The spindle bearing 46 is held in the bearing box 24. The bearing box 24 has a recess 24B recessed rearward from the front surface of the bearing box 24. The spindle bearing 46 is disposed in the recess 24B.

[0089] The spindle 8 has a supply port 8B for supplying lubricating oil. The lubricating oil includes grease. The supply port 8B is provided in the rod portion 45. The spindle 8 has an internal space 8C in which the lubricating oil is accommodated. The supply port 8B is connected to the internal space 8C. The lubricating oil is supplied from the supply port 8B to at least a portion of the periphery of the spindle 8 by the centrifugal force of the spindle 8.

[0090] The striking mechanism 9 strikes the anvil 10 in a rotational direction based on the rotation of the spindle 8. The striking mechanism 9 has a hammer 47, a ball 48, and a coil spring 49. The striking mechanism 9 including the hammer 47 is housed in the hammer case 4.

[0091] The hammer 47 is disposed forward of the reduction mechanism 7. The hammer 47 is disposed around the spindle 8. The hammer 47 is held by the spindle 8. The ball 48 is disposed between the spindle 8 and the hammer 47. The coil spring 49 is supported by each of the spindle 8 and the hammer 47.

[0092] The hammer 47 is cylindrical. The hammer 47 is disposed around the rod portion 45. The hammer 47 has a hole 57 in which the rod portion 45 is disposed. The hammer 47 is rotatable together with the spindle 8. The rotation axis of the hammer 47, the rotation axis of the spindle 8, and the rotation axis AX of the motor 6 coincide with each other. The hammer 47 rotates around the rotation axis AX.

[0093] The ball 48 is made of a metal such as steel. The ball 48 is disposed between the rod portion 45 and the hammer 47. The spindle 8 has a spindle groove 50 in which at least a part of the ball 48 is disposed. The spindle groove 50 is provided on a part of the outer surface of the rod portion 45. The hammer 47 has a hammer groove 51 in which at least a part of the ball 48 is disposed. The hammer groove 51 is provided on a part of the inner surface of the hammer 47. The ball 48 is disposed between the spindle groove 50 and the hammer groove 51. The ball 48 can roll on the inside of the spindle groove 50 and the inside of the hammer groove 51. The hammer 47 can move together with the ball 48. The spindle 8 and the hammer 47 can move relative to each other in the axial direction and the rotational direction within a movable range defined by the spindle groove 50 and the hammer groove 51.

[0094] The coil spring 49 generates an elastic force that moves the hammer 47 forward. The coil spring 49 is disposed between the flange portion 44 and the hammer 47. A ring-shaped recess 53 is provided on the rear surface of the hammer 47. The recess 53 is recessed forward from the rear surface of the hammer 47. A washer 54 is provided inside the recess 53. The rear end of the coil spring 49 is supported by the flange portion 44. The front end of the coil spring 49 is disposed inside the recess 53 and supported by the washer 54.

[0095] At least a portion of the anvil 10 is positioned forward of the hammer 47. The anvil 10 has an insertion hole 55 into which the tool bit is inserted. The insertion hole 55 is provided at the front end of the anvil 10. The tool bit is attached to the anvil 10. The anvil 10 also has a hole 58 in which the front end of the rod portion 45 is disposed. The hole 58 is provided at the rear end of the anvil 10. The front end of the rod portion 45 is disposed in the hole 58.

[0096] The anvil 10 is rotatable together with the hammer 47. The rotation axis of the anvil 10, the rotation axis of the hammer 47, the rotation axis of the spindle 8, and the rotation axis AX of the motor 6 are coincident with each other. The anvil 10 rotates around the rotation axis AX. The anvil 10 is rotatably supported by a pair of anvil bearings 56. The pair of anvil bearings 56 are held by the hammer case 4.

[0097] The hammer 47 has a cylindrical hammer body 47A and a hammer protrusion 47B. The recess 53 is provided on the rear surface of the hammer body 47A. The hammer protrusion 47B is provided on the front portion of the hammer body 47A. Two hammer protrusions 47B are provided. The hammer protrusions 47B protrude forward from the front portion of the hammer body 47A.

[0098] The anvil 10 has a rod-shaped anvil body 10A and an anvil protrusion 10B. The insertion hole 55 is provided at the front end of the anvil body 10A. The tip tool is attached to the anvil body 10A. The anvil protrusion 10B is provided at the rear end of the anvil 10. Two anvil protrusions 10B are provided. The anvil protrusions 10B protrude radially outward from the rear end of the anvil body 10A.

[0099] The hammer protrusion 47B and the anvil protrusion 10B can come into contact with each other. When the motor 6 is driven in a state in which the hammer protrusion 47B and the anvil protrusion 10B are in contact with each other, the anvil 10 rotates together with the hammer 47 and the spindle 8.

[0100] The anvil 10 is an output part of the power tool 1A driven by the motor 6. The anvil 10 is rotated by the motor 6 via the spindle 8. The anvil 10 is struck in the rotational direction by the hammer 47. For example, in a screw tightening operation, when the load acting on the anvil 10 becomes high, a situation may occur in which the anvil 10 cannot be rotated by the power generated by the motor 6 alone. When the anvil 10 cannot be rotated by the power generated by the motor 6 alone, the rotation of the anvil 10 and the hammer 47 stops. The spindle 8 and the hammer 47 can move relatively in the axial direction and the circumferential direction via the ball 48. Even if the rotation of the hammer 47 stops, the rotation of the spindle 8 continues by the power generated by the motor 6. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the ball 48 moves backward while being guided by the spindle groove 50 and the hammer groove 51. The hammer 47 receives a force from the ball 48 and moves backward along with the ball 48. That is, the hammer 47 moves rearward by the rotation of the spindle 8 while the rotation of the anvil 10 is stopped. When the hammer 47 moves rearward, the contact between the hammer protrusion 47B and the anvil protrusion 10B is released.

[0101] The coil spring 49 generates an elastic force that moves the hammer 47 forward. The hammer 47 that has moved backward moves forward due to the elastic force of the coil spring 49. When the hammer 47 moves forward, it receives a force in the rotational direction from the ball 48. That is, the hammer 47 moves forward while rotating. When the hammer 47 moves forward while rotating, the hammer protrusion 47B comes into contact with the anvil protrusion 10B while rotating. As a result, the anvil protrusion 10B is struck in the rotational direction by the hammer protrusion 47B. Both the power of the motor 6 and the inertial force of the hammer 47 act on the anvil 10. Therefore, the anvil 10 can rotate around the rotation axis AX with high torque.

[0102] The chuck sleeve 11 is disposed around the front portion of the anvil 10. The chuck sleeve 11 holds the tool bit inserted into the insertion hole 55.

[0103] The fan 12 is disposed behind the stator 26 of the motor 6. The fan 12 generates an airflow for cooling the motor 6. The fan 12 is configured to have a smaller diameter than the stator core 28. Since the outer diameter of the fan 12 is smaller than the outer diameter of the stator core 28, the rear cover 3 that houses the fan 12 can be made smaller.

[0104] The fan 12 is fixed to at least a part of the rotor 27. The fan 12 is fixed to the rear part of the rear shaft part 33R via a bush 61. The fan 12 is disposed between the rear rotor bearing 39R and the stator 26. The fan 12 rotates by the rotation of the rotor 27. As the rear shaft part 33R rotates, the fan 12 rotates together with the rear shaft part 33R. As the fan 12 rotates, air in the external space of the housing 2 flows into the internal space of the housing 2 through the intake port 19. The air that has flowed into the internal space of the housing 2 circulates through the internal space of the housing 2 to cool the motor 6. As the fan 12 rotates, the air that has circulated through the internal space of the housing 2 flows out through the exhaust port 20 to the external space of the housing 2.

[0105] The controller 13 is accommodated in the controller accommodating section 23. The controller 13 controls the motor 6. The controller 13 outputs a control signal for controlling the motor 6. The controller 13 includes a printed circuit board (PCB). The printed wiring board includes a printed wiring board (PWB) and a plurality of electronic components mounted on the printed wiring board. Examples of the electronic components mounted on the printed wiring board include a processor such as a central processing unit (CPU), a non-volatile memory such as a read only memory (ROM) or storage, a volatile memory such as a random access memory (RAM), a transistor, and a resistor.

[0106] The controller 13 switches the control mode of the motor 6 based on the operation of the power tool 1A. The control mode of the motor 6 refers to a control method or control pattern of the motor 6.

[0107] The trigger switch 14 is provided on the grip portion 22. The trigger switch 14 is operated by an operator to start the motor 6. The trigger switch 14 includes a trigger member 14A and a switch body 14B. The switch body 14B is housed in the grip portion 22. The trigger member 14A protrudes forward from an upper part of the front part of the grip portion 22. The trigger member 14A is operated by an operator. By operating the trigger member 14A, the motor 6 is switched between being driven and being stopped.

[0108] The forward / reverse switching lever 15 is provided on the upper part of the grip portion 22. The forward / reverse switching lever 15 is operated by an operator. By operating the forward / reverse switching lever 15, the rotation direction of the motor 6 is switched from one of the forward direction and the reverse direction to the other. By switching the rotation direction of the motor 6, the rotation direction of the spindle 8 is switched.

[0109] The operation panel 16 is provided in the controller accommodating portion 23. The operation panel 16 is operated by an operator to switch the control mode of the motor 6. The operation panel 16 is plate-shaped. The controller accommodating portion 23 has an opening 63 in which the operation panel 16 is disposed. The opening 63 is provided on the upper surface of the controller accommodating portion 23, forward of the grip portion 22. At least a portion of the operation panel 16 is disposed in the opening 63.

[0110] The operation panel 16 has an impact force switch 64 and a dedicated switch 65. Each of the impact force switch 64 and the dedicated switch 65 is operated by an operator. By operating at least one of the impact force switch 64 and the dedicated switch 65, the control mode of the motor 6 is switched.

[0111] The mode changeover switch 17 is provided on the upper part of the trigger member 14A. The mode changeover switch 17 is operated by an operator. By operating the mode changeover switch 17, the control mode of the motor 6 is switched.

[0112] The light 18 illuminates the area in front of the anvil 10. The light 18 emits illumination light that illuminates the area in front of the power tool 1A. The light 18 is held at a front end of the motor housing portion 21. The light 18 includes, for example, a light emitting diode (LED).

[0113] The light 18 includes a first light 18L disposed on the left side of the hammer case 4 and a second light 18R disposed on the right side of the hammer case 4. The first light 18L is disposed on the left side of the anvil 10. The second light 18R is disposed on the right side of the anvil 10.

[0114] <Power tool operation> Next, the operation of the power tool 1A will be described. For example, when performing a screw tightening operation on a workpiece, a tip tool (driver bit) used for the screw tightening operation is inserted into the insertion hole 55 of the anvil 10. The tip tool inserted into the insertion hole 55 is held by the chuck sleeve 11. After the tip tool is attached to the anvil 10, the operator grips the grip portion 22 and operates the trigger switch 14. When the trigger switch 14 is operated, power is supplied from the battery pack 25 to the motor 6, and the motor 6 is started. In addition, at the same time as the motor 6 is started, the light 18 is turned on. When the motor 6 is started, the shaft portion 33 of the rotor 27 rotates. When the shaft portion 33 rotates, the rotational force of the shaft portion 33 is transmitted to the planetary gear 42 via the pinion gear 41. The planetary gear 42 revolves around the pinion gear 41 while rotating on its own axis while meshing with the internal teeth of the internal gear 43. The planetary gear 42 is rotatably supported by the spindle 8 via a pin 42P. The revolution of the planetary gear 42 causes the spindle 8 to rotate at a rotational speed lower than the rotational speed of the shaft portion 33.

[0115] When the spindle 8 rotates while the hammer protrusion 47B and the anvil protrusion 10B are in contact with each other, the anvil 10 rotates together with the hammer 47 and the spindle 8. As the anvil 10 rotates, the screw tightening operation progresses.

[0116] When a load equal to or greater than a predetermined value acts on the anvil 10 as the screw tightening operation progresses, the rotation of the anvil 10 and the hammer 47 stops. When the spindle 8 rotates while the rotation of the hammer 47 is stopped, the hammer 47 moves rearward. As the hammer 47 moves rearward, the hammer protrusion 47B and the anvil protrusion 10B are released from contact with each other. The hammer 47 that has moved rearward moves forward while rotating due to the elastic force of the coil spring 49. As the hammer 47 moves forward while rotating, the anvil 10 is struck in the rotational direction by the hammer 47. This causes the anvil 10 to rotate about the rotation axis AX with high torque. Therefore, the screw is tightened to the workpiece with high torque.

[0117] <label> 2, 7, and 8, the power tool 1A includes a recess 81 provided in a label area 71 defined in a portion of the outer surface of the housing 2, and a label 91 attached to the label area 71.

[0118] In this embodiment, the label area 71 is defined on the outer surface of the motor accommodating portion 21. The label area 71 is defined on a portion of the outer surface of the right side of the motor accommodating portion 21. The label area 71 is defined on a portion of the outer surface of the right housing 2R. In this embodiment, the outer shape of the label area 71 is elongated in the front-rear direction. The outer shape of the label area 71 is substantially octagonal.

[0119] A plurality of recesses 81 are provided in the label area 71 at intervals.

[0120] The label 91 is a sheet-like member on which data related to the power tool 1A is printed. The label 91 is attached to the label area 71 with an adhesive. The label 91 has a joining surface 91A facing the label area 71 and a printed surface 91B on which data related to the power tool 1A is printed. The joining surface 91A of the label 91 and the label area 71 are joined with an adhesive. With the joining surface 91A of the label 91 and the label area 71 joined, the printed surface 91B of the label 91 faces outward.

[0121] The outer shape of the label 91 is substantially equal to that of the label area 71. The label 91 is affixed to the label area 71 so that the peripheral edge of the label 91 coincides with the peripheral edge of the label area 71. The label 91 is affixed to the label area 71 so as to cover the recesses 81. The label 91 is affixed to the label area 71 so as to hide each of the multiple recesses 81. When the label 91 is affixed to the label area 71, the worker cannot see the recesses 81.

[0122] The label 91 is made of synthetic resin. Polyethylene terephthalate resin (PET) is an example of the synthetic resin that forms the label 91. The thickness of the sheet member of the label 91 is, for example, 10 μm or more and 50 μm or less.

[0123] Data related to the power tool 1A is printed in ink on the printing surface 91B of the label 91. Examples of the data related to the power tool 1A include the product name of the power tool 1A, the specifications of the power tool 1A, and precautions for using the power tool 1A. Letters, numbers, or symbols are printed as the data related to the power tool 1A.

[0124] Fig. 9 is a perspective view showing a part of the outer surface of the right housing 2R according to this embodiment. Fig. 10 is a perspective view showing a part of the inner surface of the right housing 2R according to this embodiment. Fig. 11 is a cross-sectional view showing a part of the right housing 2R according to this embodiment. Fig. 11 corresponds to a cross-sectional view taken along line AA in Fig. 9. Fig. 12 is a perspective view showing a recess 81 according to this embodiment.

[0125] Hereinafter, the right housing 2R will be mainly described. The structure of the left housing 2L is substantially the same as that of the right housing 2R. Note that the left housing 2L does not have the recess 81.

[0126] 9, a plurality of recesses 81 are provided at intervals in the up-down direction, and a plurality of recesses 81 are provided at intervals in the front-rear direction.

[0127] In the following description, of the multiple recesses 81 provided in the fore-and-aft direction, the multiple recesses 81 provided furthest forward will be appropriately referred to as recesses 81A, the multiple recesses 81 provided next to recesses 81A will be appropriately referred to as recesses 81B, the multiple recesses 81 provided next to recesses 81B will be appropriately referred to as recesses 81C, the multiple recesses 81 provided next to recesses 81C will be appropriately referred to as recesses 81D, and the multiple recesses 81 provided furthest rear will be appropriately referred to as recesses 81E.

[0128] The four recesses 81A are provided at intervals in the up-down direction, and the positions of the four recesses 81A in the front-rear direction are substantially equal.

[0129] Five recesses 81B are provided at intervals in the up-down direction. The five recesses 81B are substantially equally positioned in the front-rear direction.

[0130] The four recesses 81C are provided at intervals in the up-down direction, and the positions of the four recesses 81C in the front-rear direction are substantially equal.

[0131] Five recesses 81D are provided at intervals in the up-down direction. The five recesses 81D are substantially equally positioned in the front-rear direction.

[0132] The four recesses 81E are provided at intervals in the up-down direction, and the positions of the four recesses 81E in the front-rear direction are substantially equal.

[0133] 7 and 10, the right housing 2R has a protrusion 101 that protrudes radially inward from the inner surface of the right housing 2R. The protrusion 101 is provided on the inner surface of the motor accommodating portion 21. The protrusion 101 protrudes radially inward from the inner surface of the motor accommodating portion 21. A plurality of protrusions 101 are provided at intervals in the front-rear direction.

[0134] In the following description, of the multiple protrusions 101 provided in the front-to-rear direction, the protrusion 101 provided most forward will be referred to as protrusion 101A, the protrusion 101 provided next forward after protrusion 101A will be referred to as protrusion 101B, the protrusion 101 provided next forward after protrusion 101B will be referred to as protrusion 101C, the protrusion 101 provided next forward after protrusion 101C will be referred to as protrusion 101D, and the protrusion 101 provided most rearward will be referred to as protrusion 101E.

[0135] The protrusion 101A is provided to extend in the vertical direction on the inner surface of the right housing 2R. The protrusion 101B is provided to extend in the vertical direction on the inner surface of the right housing 2R. The protrusion 101C is provided to extend in the vertical direction on the inner surface of the right housing 2R. The protrusion 101D is provided to extend in the vertical direction on the inner surface of the right housing 2R. The protrusion 101E is provided to extend in the vertical direction on the inner surface of the right housing 2R.

[0136] The protrusion 101 supports an internal member accommodated in the housing 2. In this embodiment, the protrusion 101 supports an internal member accommodated in the motor accommodating section 21. The internal members accommodated in the motor accommodating section 21 include the motor 6, the bearing box 24, and the hammer case 4. The bearing box 24 and the hammer case 4 each accommodate a power transmission mechanism that transmits the power of the motor 6 to the anvil 10. The bearing box 24 and the hammer case 4 each are made of metal. The bearing box 24 accommodates at least a part of the reduction mechanism 7 as the power transmission mechanism. The hammer case 4 accommodates the reduction mechanism 7, the spindle 8, and the impact mechanism 9 as the power transmission mechanism. The impact mechanism 9 can be considered as a power conversion mechanism that converts the rotational force of the motor 6 into impact force.

[0137] Each of the protruding portion 101A and the protruding portion 101B supports the hammer case 4. At least a portion of the protruding portion 101A contacts the hammer case 4. At least a portion of the protruding portion 101B contacts the hammer case 4.

[0138] Each of the protrusions 101C and 101D supports the bearing box 24. At least a portion of the protrusion 101C contacts the bearing box 24. At least a portion of the protrusion 101D contacts the bearing box 24.

[0139] The protruding portion 101E supports the motor 6. At least a portion of the protruding portion 101E contacts the stator .

[0140] The right housing 2R includes a thin portion 40 and a thick portion 60 that is thicker than the thin portion 40. The thin portion 40 and the thick portion 60 are adjacent to each other. The thin portion 40 does not include a protruding portion 101. The thick portion 60 includes a protruding portion 101.

[0141] A label area 71 is defined to include the outer surface of the thin portion 40 and the outer surface of the thick portion 60 .

[0142] In this embodiment, the recess 81 is provided on the outer surface of the thick portion 60. The protrusion 101 is provided directly behind the recess 81. The position of the recess 81 coincides with the position of at least a part of the protrusion 101 in both the front-rear direction and the up-down direction.

[0143] The protruding portion 101A is provided directly behind the recessed portion 81A. A plurality of recessed portions 81A are provided at intervals in the up-down direction on the outer surface of the thick portion 60 including the protruding portion 101A so as to extend along the direction in which the protruding portion 101A extends.

[0144] The convex portion 101B is provided directly behind the concave portion 81B. A plurality of concave portions 81B are provided at intervals in the up-down direction on the outer surface of the thick portion 60 including the convex portion 101B so as to extend along the direction in which the convex portion 101B extends.

[0145] The protruding portion 101C is provided directly behind the recessed portion 81C. A plurality of recessed portions 81C are provided at intervals in the up-down direction on the outer surface of the thick portion 60 including the protruding portion 101C and along the extending direction of the protruding portion 101C.

[0146] The protruding portion 101D is provided directly behind the recessed portion 81D. A plurality of recessed portions 81D are provided at intervals in the up-down direction on the outer surface of the thick portion 60 including the protruding portion 101D so as to extend along the direction in which the protruding portion 101D extends.

[0147] The protruding portion 101E is provided directly behind the recessed portion 81E. A plurality of recessed portions 81E are provided at intervals in the up-down direction on the outer surface of the thick portion 60 including the protruding portion 101E so as to extend along the direction in which the protruding portion 101E extends.

[0148] 11, the recess 81D is provided on the outer surface of the thick portion 60 including the protrusion 101D. The protrusion 101D is disposed directly behind the recess 81D. The position of the recess 81D coincides with the position of at least a part of the protrusion 101D in both the front-rear direction and the up-down direction.

[0149] The protrusion 101D includes a first portion 67 and a second portion 68 protruding radially inward from the first portion 67. The first portion 67 is provided to extend in the vertical direction on the inner surface of the right housing 2R. Two second portions 68 are provided spaced apart in the vertical direction. As described above, the protrusion 101D supports the bearing box 24. The first portion 67 contacts the outer surface of the bearing box 24. The second portion 68 fits into a recess provided in the outer surface of the bearing box 24.

[0150] The housing 2 has a thin portion 60A including the first portion 67 and a thick portion 60B including the second portion 68. That is, in this embodiment, the thick portion 60 including the protrusion 101D has the thin portion 60A and the thick portion 60B. The thickness Tb of the thick portion 60B is thicker than the thickness Ta of the thin portion 60A.

[0151] Five recesses 81D are provided at intervals in the vertical direction along the extension direction of the first portion 67. In the following description, of the multiple recesses 81D provided in the vertical direction, the recess 81D located at the top will be appropriately referred to as recess 81D1, the recess 81D located next below recess 81D1 will be appropriately referred to as recess 81D2, the recess 81D located next below recess 81D2 will be appropriately referred to as recess 81D3, the recess 81D located next below recess 81D3 will be appropriately referred to as recess 81D4, and the recess 81D located at the bottom will be appropriately referred to as recess 81D5.

[0152] The recesses 81D are formed on the outer surface of the thin portion 60A and the outer surface of the thick portion 60B. The recesses 81D1 and 81D2 are disposed on the outer surface of the upper thick portion 60B of the two thick portions 60B disposed vertically. The recesses 81D4 and 81D5 are disposed on the outer surface of the lower thick portion 60B of the two thick portions 60B disposed vertically. The recess 81D3 is disposed on the outer surface of the thin portion 60A between the upper thick portion 60B and the lower thick portion 60B.

[0153] The number of recesses 81D formed on the outer surface of the thick portion 60B is greater than the number of recesses 81D formed on the outer surface of the thin portion 60A. In the example shown in Fig. 11, two recesses 81D (81D1, 81D2) are formed on the outer surface of the upper thick portion 60B. Two recesses 81D (81D4, 81D5) are formed on the outer surface of the lower thick portion 60B. One recess 81D (81D3) is formed on the outer surface of the thin portion 60A.

[0154] The depth Db of the recess 81D formed in the outer surface of the thick portion 60B is greater than the depth Da of the recess 81D formed in the outer surface of the thin portion 60A.

[0155] An area Ab of the opening of the recess 81D formed in the outer surface of the thick portion 60B is larger than an area Aa of the opening of the recess 81D formed in the outer surface of the thin portion 60A.

[0156] In addition to the convex portion 101D, at least one of the convex portions 101A, 101B, 101C, and 101E may have the first portion 67 and the second portion 68.

[0157] As shown in FIG. 12, in this embodiment, the opening of the recess 81 is circular. The inner surface of the recess 81 is substantially cylindrical. The depth D of the recess 81 is 1 mm or more and 3 mm or less. In this embodiment, the average value of the depth D of the multiple recesses 81 is about 1.5 mm. The diameter R of the opening of the recess 81 is 1 mm or more and 3 mm or less. In this embodiment, the average value of the diameter R of the opening of the multiple recesses 81 is about 1.5 mm. The interval G between adjacent recesses 81 is larger than the diameter R. In this embodiment, the interval G is 2 mm or more and 6 mm or less.

[0158] <Effects> As described above, according to this embodiment, the power tool 1A includes the motor 6, the anvil 10 which is an output part driven by the motor 6, and the housing 2 made of synthetic resin including the motor housing part 21 which houses the motor 6. The power tool 1A includes a recess 81 provided in a label area 71 defined in a part of the outer surface of the housing 2. The power tool 1A includes a label 91 affixed to the label area 71.

[0159] In the above configuration, by providing the recess 81 on the outer surface of the housing 2, molding shrinkage of the housing 2 is improved and the occurrence of sink marks is suppressed. Since the recess 81 is provided in the label area 71, the occurrence of sink marks in the label area 71 is suppressed. Since the label 91 is affixed to the label area 71 where the occurrence of sink marks is suppressed, distortion of the label 91 is suppressed. Therefore, poor appearance of the label is suppressed and the worker can correctly read the data printed on the label 91. Moreover, the label 91 is affixed to the label area 71 so as to hide the recess 81. Therefore, poor appearance of the power tool 1A is suppressed.

[0160] In this embodiment, a plurality of recesses 81 are provided in the label area 71 at intervals.

[0161] The above configuration effectively prevents the occurrence of sink marks. In addition, since the size of the opening of each recess 81 can be reduced, when the label 91 is attached to the label area 71, the label 91 is prevented from falling into the recess 81. The label 91 is attached to the label area 71 with reduced distortion.

[0162] In this embodiment, the housing 2 includes a thin portion 40 and a thick portion 60 that is thicker than the thin portion 40. The label area 71 is defined to include the outer surface of the thin portion 40 and the outer surface of the thick portion 60.

[0163] In the above configuration, the label area 71 can be defined in any area on the outer surface of the housing 2 .

[0164] In this embodiment, the recess 81 is provided on the outer surface of the thick portion 60 .

[0165] With the above configuration, the occurrence of sink marks is effectively suppressed.

[0166] In this embodiment, recesses 81 are formed on each of the outer surface of the thin portion 60A and the outer surface of the thick portion 60B. The number of recesses 81 formed on the outer surface of the thick portion 60B is greater than the number of recesses 81 formed on the outer surface of the thin portion 60A.

[0167] In the above configuration, the number of recesses 81 formed on the outer surface of the thick portion 60B is greater than the number of recesses 81 formed on the outer surface of the thin portion 60A, thereby effectively improving molding shrinkage of the housing 2 and suppressing the occurrence of sink marks.

[0168] In this embodiment, recesses 81 are formed on the outer surface of each of the thin portion 60A and the thick portion 60B. The depth Db of recesses 81 formed on the outer surface of the thick portion 60B is deeper than the depth Da of recesses 81 formed on the outer surface of the thin portion 60A.

[0169] In the above configuration, the depth Db of the recess 81 formed in the outer surface of the thick portion 60B is deeper than the depth Da of the recess 81 formed in the outer surface of the thin portion 60A, thereby effectively improving the molding shrinkage of the housing 2 and suppressing the occurrence of sink marks.

[0170] In this embodiment, recesses 81 are formed on the outer surface of each of the thin portion 60A and the thick portion 60B. An opening area Ab of recesses 81 formed on the outer surface of the thick portion 60B is larger than an opening area Aa of recesses 81 formed on the outer surface of the thin portion 60A.

[0171] In the above configuration, the area Ab of the opening of the recess 81 formed in the outer surface of the thick portion 60B is larger than the area Aa of the opening of the recess 81 formed in the outer surface of the thin portion 60A, so that molding shrinkage of the housing 2 is effectively improved and the occurrence of sink marks is suppressed.

[0172] In this embodiment, the housing 2 has a protrusion 101 protruding from the inner surface of the housing 2. The protrusion 101 includes a first portion 67 and a second portion 68 protruding from the first portion 67. The thin portion 60A includes the first portion 67. The thick portion 60B includes the second portion 68.

[0173] In the above-described configuration, when the protrusion 101 itself has a plurality of portions with different thicknesses, the occurrence of sink marks is effectively suppressed.

[0174] In this embodiment, the convex portion 101 is provided so as to extend in the vertical direction. A plurality of the concave portions 81 are provided at intervals in the vertical direction.

[0175] In the above configuration, when the protruding portion 101 is provided so as to extend in the vertical direction, the recessed portions 81 are provided at intervals in the vertical direction, so that the occurrence of sink marks is effectively suppressed.

[0176] In this embodiment, a plurality of convex portions 101 are provided in the front-rear direction perpendicular to the up-down direction. A plurality of concave portions 81 are provided at intervals in the front-rear direction.

[0177] In the above configuration, when a plurality of protruding portions 101 are provided in the front-rear direction, a plurality of recessed portions 81 are provided at intervals in the front-rear direction, so that the occurrence of sink marks is effectively suppressed.

[0178] In this embodiment, the protrusion 101 supports an internal member accommodated in the housing 2 .

[0179] In the above configuration, the internal member is stably supported by the protrusion 101.

[0180] In an embodiment, the internal member includes a motor 6 .

[0181] In the above configuration, the motor 6 is stably supported by the protruding portion 101.

[0182] In this embodiment, the internal components include a metal bearing box 24 and hammer case 4 that house the reduction mechanism 7, spindle 8, and striking mechanism 9.

[0183] In the above configuration, the bearing box 24 and the hammer case 4 are stably supported by the protruding portion 101.

[0184] In this embodiment, the label area 71 is defined on the outer surface of the motor accommodating portion 21 .

[0185] In the above configuration, the label 91 is attached to the outer surface of the motor accommodating portion 21 in a state where the distortion is reduced. An operator can visually confirm the label 91 in which the distortion has been reduced.

[0186] In this embodiment, the motor accommodating portion 21 has a protrusion 101 that protrudes from the inner surface of the motor accommodating portion 21. The protrusion 101 supports the motor 6.

[0187] In the above configuration, the motor 6 is stably supported by the protruding portion 101.

[0188] In this embodiment, the opening of the recess 81 is circular.

[0189] In the above configuration, the recess 81 is easily formed.

[0190] <Modification> Each of Figures 13, 14, and 15 is a perspective view showing a recess 81 according to a modified example of this embodiment. As shown in Figure 13, the opening of the recess 81 may be circular, and the inner surface of the recess 81 may be hemispherical. As shown in Figures 14 and 15, the opening of the recess 81 may be polygonal. In the example shown in Figure 14, the opening of the recess 81 is rectangular. The opening of the recess 81 shown in Figure 15 is hexagonal.

[0191] 16 is a cross-sectional view showing a schematic view of a part of a right housing 2R according to a modified example of this embodiment. As described above, the right housing 2R includes a thin portion 40 and a thick portion 60 that is thicker than the thin portion 40. The thin portion 40 does not include a protruding portion 101. The thick portion 60 includes a protruding portion 101. The thickness T2 of the thick portion 60 is thicker than the thickness T1 of the thin portion 40.

[0192] The recess 81 may be formed not only in the outer surface of the thick portion 60 but also in the outer surface of the thin portion 40. That is, as shown in FIG. 16 , the recess 81 may be formed in each of the outer surfaces of the thin portion 40 and the thick portion 60.

[0193] 16, two thick portions 60 are arranged at an interval in the front-rear direction. The thin portion 40 is arranged between the front thick portion 60 and the rear thick portion 60.

[0194] The number of recesses 81 formed in the outer surface of the thick portion 60 is greater than the number of recesses 81 formed in the outer surface of the thin portion 40. In the example shown in Fig. 16, two recesses 81 are formed in the outer surface of one thick portion 60. One recess 81 is formed in the outer surface of one thin portion 40.

[0195] The depth D2 of the recess 81 formed in the outer surface of the thick portion 60 is greater than the depth D1 of the recess 81 formed in the outer surface of the thin portion 40.

[0196] The area A2 of the opening of the recess 81 formed in the outer surface of the thick portion 60 is larger than the area A1 of the opening of the recess 81 formed in the outer surface of the thin portion 40.

[0197] As described above, the housing 2 has the protrusion 101 protruding from the inner surface of the housing 2. The thin portion 40 does not include the protrusion 101, but the thick portion 60 includes the protrusion 101.

[0198] In the above-described configuration, when the housing 2 has a plurality of portions with different thicknesses, the occurrence of sink marks is effectively suppressed.

[0199] [Second embodiment] A second embodiment will be described below. Descriptions of components that are the same as or equivalent to those in the above-described embodiment will be simplified or omitted.

[0200] Fig. 17 is a perspective view showing a power tool 1B according to this embodiment. Fig. 18 is a vertical cross-sectional view showing the power tool 1B according to this embodiment. Fig. 19 is a horizontal cross-sectional view showing the power tool 1B according to this embodiment. Fig. 19 corresponds to a cross-sectional view taken along line BB in Fig. 17. Fig. 20 is a perspective view showing a label area 72 and a label 92 according to this embodiment. Fig. 21 is a see-through view showing the vicinity of the label area 72 according to this embodiment.

[0201] In this embodiment, the power tool 1B is a hammer drill. The power tool 1B includes a housing 202, a case 402, a battery mounting portion 502, a motor 602, a striking mechanism 902, a chuck sleeve 1102, a controller 1302, and a trigger switch 1402.

[0202] The housing 202 includes a motor accommodating section 2102 , a grip section 2202 , a controller accommodating section 2302 , and a main body accommodating section 2402 .

[0203] The motor housing portion 2102 houses the motor 602 .

[0204] The grip portion 2202 is held by an operator. An upper portion of the grip portion 2202 is connected to the main body housing portion 2402. A lower portion of the grip portion 2202 is connected to the motor housing portion 2102. The trigger switch 1402 is disposed on the grip portion 2202.

[0205] The controller accommodating section 2302 accommodates the controller 1302. The controller accommodating section 2302 is connected to the lower part of the motor accommodating section 2102 and the lower part of the grip section 2202. The battery attachment section 502 is disposed below the controller accommodating section 2302. Two battery packs 25 are attached to the battery attachment section 502.

[0206] The main body accommodating portion 2402 accommodates the case 402. The case 402 is made of metal. The case 402 accommodates the striking mechanism 902. The main body accommodating portion 2402 is connected to an upper portion of the motor accommodating portion 2102 and a front portion of the grip portion 2202.

[0207] The motor 602 has a rotor shaft 300. An upper portion of the rotor shaft 300 is disposed inside the main body accommodating portion 2402.

[0208] The striking mechanism 902 has a cylindrical tool holder 301 and a cylinder 302. The tool holder 301 is held in the front part of the main body accommodating part 2402. The cylinder 302 is held in the rear part of the main body accommodating part 2402. A crankshaft 303 is disposed behind the cylinder 302. A gear 304 is provided below the crankshaft 303. The gear 304 meshes with a pinion gear provided on the upper end part of the rotor shaft 300.

[0209] A piston 305 is accommodated in the cylinder 302. The piston 305 is movable in the front-rear direction. The piston 305 is connected to the crankshaft 303 via a connecting rod 306. A striker 308 is disposed in front of the piston 305 via an air chamber 307. The striker 308 is movable in the front-rear direction. An impact bolt 309, against which a tool bit abuts, is disposed in front of the striker 308. The chuck sleeve 1102 is provided at the front end of the tool holder 301.

[0210] The grip portion 2202 is movable in the front-rear direction relative to the motor housing portion 2102 and the main body housing portion 2402. A sensor portion 310 that detects movement of the grip portion 2202 is provided behind the motor 602. A rotation speed adjustment dial 311 is provided below the sensor portion 310. The controller 1302 drives the motor 602 at the rotation speed set by operating the rotation speed adjustment dial 311.

[0211] When the tool tip attached to the tool holder 301 is not pressed against the workpiece, the grip portion 2202 is located at the retracted position. When the trigger switch 1402 is operated, the controller 1302 rotates the motor 602 at a preset low rotation speed. When the motor 602 is driven and the rotor shaft 300 rotates, the crankshaft 303 rotates via the gear 304, and the piston 305 moves in the front-rear direction via the connecting rod 306. As a result, the striker 308 moves in the front-rear direction via the air chamber 307.

[0212] When the tool tip is pressed against the workpiece, the grip portion 2202 moves forward. When the grip portion 2202 moves forward, the sensor portion 310 detects the movement of the grip portion 2202. Based on the detection signal of the sensor portion 310, the controller 1302 drives the motor 602 at the high rotation speed set by the rotation speed adjustment dial 311.

[0213] A label area 72 is defined on a part of the outer surface of the main body accommodating portion 2402. The label area 72 is defined on the upper surface of the main body accommodating portion 2402. A plurality of recesses 82 are provided in the label area 72. A label 92 is attached to the label area 72 so as to cover the recesses 82.

[0214] 19, the main body accommodating portion 2402 has a protrusion 102 protruding from the inner surface of the main body accommodating portion 2402. The protrusion 102 protrudes downward from an upper portion of the inner surface of the main body accommodating portion 2402. Two protrusions 102 are provided in the left-right direction. The recess 82 is provided on the outer surface of the thick portion of the main body accommodating portion 2402 including the protrusion 102. The protrusion 102 is provided directly behind the recess 82. The protrusion 102 supports the case 402.

[0215] [Third embodiment] A third embodiment will be described below. Descriptions of components that are the same as or equivalent to those in the above-described embodiments will be simplified or omitted.

[0216] Fig. 22 is a perspective view showing a power tool 1C according to this embodiment. Fig. 23 is a vertical cross-sectional view showing the power tool 1C according to this embodiment. Fig. 24 is a horizontal cross-sectional view showing the power tool 1C according to this embodiment. Fig. 24 corresponds to a cross-sectional view taken along the CC arrow in Fig. 22. Fig. 25 is a perspective view showing the label area 73 and the label 93 according to this embodiment. Fig. 26 is a see-through view showing the vicinity of the label area 73 according to this embodiment.

[0217] In this embodiment, the power tool 1C is a hammer drill. The power tool 1C includes a housing 203, a case 403, a battery mounting portion 503, a motor 603, a controller 1303, and a trigger switch 1403.

[0218] The housing 203 includes a gear accommodating portion 2403 , a motor accommodating portion 2103 , a grip portion 2203 , and a controller accommodating portion 2303 .

[0219] The gear accommodating section 2403 accommodates the power transmission mechanism 312 and the tool holder 313. The auxiliary handle 329 is attached to the gear accommodating section 2403. The front end of the gear accommodating section 2403 is a cylindrical barrel section 314. The tool tip is attached to the tool holder 313. The tool holder 313 is disposed inside the barrel section 314. The tool holder 313 supports the tool tip so that it can move in the front-rear direction. The tool holder 313 holds the tool tip so that it does not rotate. The power transmission mechanism 312 includes a motion conversion mechanism 315, an impact element 316, and a rotation transmission mechanism 317. The power transmission mechanism 312 is accommodated in a case 403. The case 403 is made of metal. The gear accommodating section 2403 supports the case 403.

[0220] The motion conversion mechanism 315 converts the rotational motion of the motor 603 into linear motion and transmits it to the striking element 316. The motion conversion mechanism 315 includes an intermediate shaft 318, a rotating body 319, a swinging member 320, and a piston cylinder 321. The intermediate shaft 318 is disposed parallel to a rotor shaft 322 of the motor 603. The rotating body 319 is attached to the outer periphery of the intermediate shaft 318. The swinging member 320 is attached to the outer periphery of the rotating body 319, and swings in the front-rear direction as the rotating body 319 rotates. The piston cylinder 321 reciprocates in the front-rear direction as the swinging member 320 swings.

[0221] A cylinder 323 is connected to the rear of the tool holder 313. The tool holder 313 and the cylinder 323 are rotatably supported by a bearing held in the gear accommodating portion 2403.

[0222] The striking element 316 operates linearly to strike the tool bit forward. The striking element 316 has a striker 324 which is an impactor, and an impact bolt 325 arranged in front of the striker 324. The striker 324 is arranged inside the piston cylinder 321. The striker 324 is movable in the front-rear direction. An air chamber 326 which functions as an air spring is provided behind the striker 324.

[0223] When the motor 603 is driven and the piston cylinder 321 moves forward, the pressure in the air chamber 326 increases. The striker 324 is pushed forward and collides with the impact bolt 325, transmitting kinetic energy to the tool tip. This drives the tool tip linearly forward and strikes the workpiece. When the piston cylinder 321 moves rearward, the pressure in the air chamber 326 decreases. The striker 324 moves rearward. The tool tip is pushed by the workpiece and returns rearward. The motion conversion mechanism 315 and the striking element 316 repeat the above-mentioned operations to perform the hammering action.

[0224] The rotation transmission mechanism 317 transmits the rotational force of the rotor shaft 322 to the tool holder 313. The rotation transmission mechanism 317 is a gear reduction mechanism including a gear 327 provided at the front end of the rotor shaft 322 and a gear 328 provided on the outer periphery of the cylinder 323 and meshing with the gear 327. When the motor 603 is driven, the cylinder 323 and the tool holder 313 connected to the cylinder 323 rotate integrally via the rotation transmission mechanism 317. This causes the tip tool held by the tool holder 313 to rotate. The rotation transmission mechanism 317 performs a drilling operation by the above-mentioned operation.

[0225] The motor accommodating portion 2103 accommodates the motor 603. The motor accommodating portion 2103 is connected to the rear of the gear accommodating portion 2403.

[0226] The grip portion 2203 is held by an operator. The grip portion 2203 is disposed so as to extend downward from the rear portion of the motor accommodating portion 2103. The trigger switch 1403 is provided on the grip portion 2203.

[0227] The controller housing section 2303 houses the controller 1303. The controller housing section 2303 is disposed below the grip section 2203. The battery attachment section 503 is disposed below the controller housing section 2303.

[0228] A label area 73 is defined on a part of the outer surface of the motor accommodating part 2103. The label area 73 is defined on the right surface of the motor accommodating part 2103. A plurality of recesses 83 are provided in the label area 73. A label 93 is attached to the label area 73 so as to cover the recesses 83.

[0229] 24, the motor accommodating portion 2103 has a protrusion 103 protruding from the inner surface of the motor accommodating portion 2103. The protrusion 103 protrudes leftward from the right side of the inner surface of the motor accommodating portion 2103. The recess 83 is provided on the outer surface of the thick portion of the motor accommodating portion 2103 including the protrusion 103. The protrusion 103 is provided directly behind the recess 83. The protrusion 103 supports the stator core 2803 of the motor 603.

[0230] [Fourth embodiment] A fourth embodiment will be described below. Descriptions of components that are the same as or equivalent to those in the above-described embodiments will be simplified or omitted.

[0231] Fig. 27 is a perspective view showing a power tool 1D according to this embodiment. Fig. 28 is a vertical cross-sectional view showing the power tool 1D according to this embodiment. Fig. 29 is a horizontal cross-sectional view showing the power tool 1D according to this embodiment. Fig. 29 corresponds to a cross-sectional view taken along line DD in Fig. 27. Fig. 30 is a perspective view showing the label area 74 and the label 94 according to this embodiment. Fig. 31 is a see-through view showing the vicinity of the label area 74 according to this embodiment.

[0232] In this embodiment, the power tool 1D is a hedge trimmer. The power tool 1D includes a housing 204, a battery mounting section 504, a motor 604, a conversion mechanism 330, a guide bar 331, a first blade 332, a second blade 333, a controller 1304, a trigger switch 1404, and an unlock lever 334.

[0233] The housing 204 has a motor accommodating section 2104, a grip section 2204, and a controller accommodating section 2304. The motor accommodating section 2104 accommodates the motor 604. The grip section 2204 is connected to both the motor accommodating section 2104 and the controller accommodating section 2304. A front grip section 335 is disposed in front of the motor accommodating section 2104. The controller 1304 accommodates the controller 1304. The battery mounting section 504 is disposed under the grip section 2204. The trigger switch 1404 and the unlock lever 334 are disposed in the grip section 2204. The unlock lever 334 prevents the trigger switch 1404 from being operated. The unlock lever 334 is operated to allow the trigger switch 1404 to be operated.

[0234] The guide bar 331 is fixed to the front of the housing 204. The guide bar 331 supports a first blade 332 and a second blade 333.

[0235] The conversion mechanism 330 has a crank cam 336, a first connecting rod 337, and a second connecting rod 338. The crank cam 336 rotates as a rotor shaft 339 of the motor 604 rotates. The first connecting rod 337 and the second connecting rod 338 are each connected to the crank cam 336. The first connecting rod 337 is connected to the first blade 332. The second connecting rod 338 is connected to the second blade 333. The first connecting rod 337 converts the rotational motion of the crank cam 336 into a reciprocating motion in the front-rear direction of the first blade 332. The second connecting rod 338 converts the rotational motion of the crank cam 336 into a reciprocating motion in the front-rear direction of the second blade 333.

[0236] The first blade 332 and the second blade 333 overlap in the up-down direction with the guide bar 331. The first blade 332 and the second blade 333 overlap in the up-down direction.

[0237] When the trigger switch 1404 is operated, the motor 604 is driven, and the first blade 332 and the second blade 333 reciprocate in opposite phases. This causes the cutting edge of the first blade 332 and the cutting edge of the second blade 333 to repeatedly cross each other, cutting the object to be cut. An example of the object to be cut is the branches and leaves of a hedge.

[0238] A label area 74 is defined on a part of the outer surface of the motor accommodating portion 2104. The label area 74 is defined on the right surface of the motor accommodating portion 2104. A plurality of recesses 84 are provided in the label area 74. A label 94 is affixed to the label area 74. The label 94 is affixed to the label area 74 so as to cover the recesses 84.

[0239] As shown in Fig. 29, the motor accommodating portion 2104 has a protrusion 104 protruding from the inner surface of the motor accommodating portion 2104. The protrusion 104 protrudes leftward from the right part of the inner surface of the motor accommodating portion 2104. The recess 84 is provided on the outer surface of the thick part of the motor accommodating portion 2104 including the protrusion 104. The protrusion 104 is provided directly behind the recess 84. The protrusion 104 supports an electronic component 340 accommodated in the motor accommodating portion 2104. An example of the electronic component 340 is a capacitor.

[0240] [Fifth embodiment] A fifth embodiment will be described. Descriptions of components that are the same as or equivalent to those in the above-described embodiments will be simplified or omitted.

[0241] Fig. 32 is a perspective view showing a power tool 1E according to this embodiment. Fig. 33 is a cross-sectional view showing a power tool 1E according to this embodiment. Fig. 33 corresponds to a cross-sectional view taken along line EE in Fig. 32. Fig. 34 is a perspective view showing a label area 75 and a label 95 according to this embodiment. Fig. 35 is a see-through view showing the vicinity of the label area 75 according to this embodiment.

[0242] In this embodiment, the power tool 1E is a cutter. The power tool 1E includes a housing 205, a battery mounting portion 505, a motor 606, a controller 1305, and a trigger switch 1405.

[0243] The housing 205 has a motor accommodating section 2105, a grip section 2205, and a controller accommodating section 2305. The motor accommodating section 2105 accommodates the motor 605. The grip section 2205 is disposed above the motor accommodating section 2105 and the controller accommodating section 2303. The controller accommodating section 2305 accommodates the controller 1305. The controller 1305 controls the motor 605. The battery attachment section 505 is disposed at the rear of the grip section 2205. The trigger switch 1405 is disposed in the grip section 2205.

[0244] The power tool 1E also has a base 341 that contacts the upper surface of the object to be cut, a front tilt support part 342 and a rear tilt support part 343 that connect the housing 205 and the base 341, a fixed cover 344 that is fixed to the housing 205, and a rotary blade 345 that rotates inside the fixed cover 344. When the motor 605 is driven, the rotary blade 345 rotates.

[0245] A label area 75 is defined on a part of the outer surface of the controller housing portion 2305. The label area 75 is defined on the upper surface of the controller housing portion 2305. A plurality of recesses 85 are provided in the label area 75. A label 95 is affixed to the label area 75. The label 95 is affixed to the label area 75 so as to cover the recesses 85.

[0246] 33, the controller accommodating portion 2305 has a convex portion 105 that protrudes from the inner surface of the controller accommodating portion 2305. The convex portion 105 protrudes downward from an upper portion of the inner surface of the controller accommodating portion 2305. The concave portion 85 is provided on the outer surface of the thick portion of the controller accommodating portion 2305 including the convex portion 105. The convex portion 105 is provided directly behind the concave portion 85. The convex portion 105 supports the controller 1305 accommodated in the controller accommodating portion 2305.

[0247] In this embodiment, the controller 1305 is stably supported by the convex portion 105. The label 95 is attached to the outer surface of the controller accommodating portion 2305 in a state in which the distortion is reduced. An operator can visually confirm the label 95 with the distortion reduced.

[0248] [Sixth embodiment] A sixth embodiment will be described. Descriptions of components that are the same as or equivalent to those in the above-described embodiments will be simplified or omitted.

[0249] Fig. 36 is a perspective view showing a power tool 1F according to this embodiment. Fig. 37 is a cross-sectional view showing a power tool 1F according to this embodiment. Fig. 37 corresponds to a cross-sectional view taken along line FF in Fig. 36. Fig. 38 is a perspective view showing a label area 76 and a label 96 according to this embodiment. Fig. 39 is a see-through view showing the vicinity of the label area 76 according to this embodiment.

[0250] In this embodiment, the power tool 1F is a circular saw. The power tool 1F includes a housing 206, a battery mounting portion 506, a motor 606, a controller 1306, and a trigger switch 1406.

[0251] The housing 206 has a motor accommodating section 2106, a grip section 2206, and a controller accommodating section 2306. The motor accommodating section 2106 accommodates the motor 606. The grip section 2206 is disposed above the motor accommodating section 2106 and the controller accommodating section 2306. The controller accommodating section 2306 accommodates the controller 1306. The controller 1306 controls the motor 606. The battery attachment section 506 is disposed at the rear of the grip section 2206. The trigger switch 1406 is disposed in the grip section 2206.

[0252] The power tool 1F also has a base 346 that contacts the upper surface of the object to be cut, a front support portion 347 and a rear support portion 348 that connect the housing 206 and the base 346, a fixed cover 349 that is fixed to the housing 206, and a rotary blade 350 that rotates inside the fixed cover 349. When the motor 606 is driven, the rotary blade 350 rotates.

[0253] A label area 76 is defined on a portion of the outer surface of the motor accommodating portion 2106. The label area 76 is defined on the front surface of the motor accommodating portion 2106. A plurality of recesses 86 are provided in the label area 76. A label 96 is attached to the label area 76. The label 96 is attached to the label area 75 so as to cover the recesses 86.

[0254] As shown in Fig. 37, the motor accommodating portion 2106 has a protrusion 106 protruding from the inner surface of the motor accommodating portion 2106. The recess 86 is provided on the outer surface of the thick portion of the motor accommodating portion 2106 including the protrusion 106. The protrusion 106 is provided directly behind the recess 86. The protrusion 106 supports the motor 606 accommodated in the motor accommodating portion 2106. The protrusion 106 supports a stator core 2806 of the motor 606.

[0255] [Seventh embodiment] A seventh embodiment will be described. Descriptions of components that are the same as or equivalent to those in the above-described embodiments will be simplified or omitted.

[0256] Fig. 40 is a perspective view showing a power tool 1G according to this embodiment. Fig. 41 is a cross-sectional view showing a power tool 1F according to this embodiment. Fig. 41 corresponds to a cross-sectional view taken along line GG in Fig. 40. Fig. 42 is a perspective view showing a label area 77 and a label 97 according to this embodiment. Fig. 43 is a see-through view showing the vicinity of the label area 77 according to this embodiment.

[0257] In this embodiment, the electric power tool 1G is a grass cutter. The electric power tool 1G includes a main pipe 351, a motor housing 2107, a grip 2207, a controller housing 2307, a cover 352, a front grip 353, a battery mounting section 507, a motor 607, a controller 1307, and a trigger switch 1407.

[0258] The motor accommodating section 2107 is connected to the front end of the main pipe 351. The controller accommodating section 2307 is connected to the rear end of the main pipe 351. The grip section 2207 is connected to the rear of the controller accommodating section 2307. The front grip section 353 is provided in the front of the controller accommodating section 2307.

[0259] The motor housing 2107 houses the motor 607. The grip portion 2207 and the front grip portion 353 are each held by an operator. The controller housing 2307 houses the controller 1307. The battery attachment portion 507 is disposed below the controller housing 2307. The trigger switch 1407 is disposed in the grip portion 2207.

[0260] The cover 352 is disposed around at least a portion of the cutting blade (not shown). When the motor 607 is driven, the cutting blade rotates.

[0261] A label area 77 is defined on a part of the outer surface of the motor accommodating part 2107. The label area 77 is defined on the right surface of the motor accommodating part 2107. A plurality of recesses 87 are provided in the label area 77. A label 97 is affixed to the label area 77. The label 97 is affixed to the label area 77 so as to cover the recesses 87.

[0262] The motor accommodating portion 2107 has a protrusion 107 protruding from the inner surface of the motor accommodating portion 2107. The recess 87 is provided on the outer surface of the thick portion of the motor accommodating portion 2107 including the protrusion 107. The protrusion 107 is provided directly behind the recess 87. The protrusion 107 supports the motor 607 accommodated in the motor accommodating portion 2107. The protrusion 107 supports a stator core 2807 of the motor 607.

[0263] [Eighth embodiment] An eighth embodiment will be described. Descriptions of components that are the same as or equivalent to those in the above-described embodiments will be simplified or omitted.

[0264] Fig. 44 is a perspective view showing a power tool 1H according to this embodiment. Fig. 45 is a vertical cross-sectional view showing the power tool 1H according to this embodiment. Fig. 46 is a horizontal cross-sectional view showing the power tool 1H according to this embodiment. Fig. 46 corresponds to the cross-sectional view taken along the arrow HH in Fig. 44. Fig. 47 is a perspective view showing the label area 78 and the label 98 according to this embodiment. Fig. 48 is a see-through view showing the vicinity of the label area 78 according to this embodiment.

[0265] In this embodiment, the power tool 1H is a hammer drill. The power tool 1H includes a housing 208, a case 408, a battery mounting portion 508, a motor 608, a controller 1308, and a trigger switch 1408.

[0266] The housing 208 includes a motor housing portion 2108 , a grip portion 2208 , and a controller housing portion 2308 .

[0267] The motor accommodating section 2108 accommodates the motor 608. The grip section 2208 is disposed rearward of the motor accommodating section 2108. The controller accommodating section 2308 accommodates the controller 1308. The controller accommodating section 2308 is disposed rearward of the grip section 2208. The trigger switch 1408 is disposed in the motor accommodating section 2108. The battery attachment section 508 is disposed at the rear of the controller accommodating section 2308. The case 408 accommodates a power transmission mechanism including a plurality of gears.

[0268] Furthermore, the power tool 1H has a bearing box 354 attached to the lower part of the case 408, a cutting tool 355 disposed below the bearing box 354, and a wheel cover 356 disposed around a part of the periphery of the cutting tool 355. A bearing that supports the output shaft is disposed inside the bearing box 354.

[0269] When the motor 608 is driven, the power of the motor 608 is transmitted to the cutting tool 355 via a power transmission mechanism housed in the case 408 and an output shaft inside the bearing box 354. The cutting tool 355 rotates to cut the cutting object.

[0270] A label area 78 is defined on a part of the outer surface of the motor accommodating portion 2108. The label area 78 is defined on the right surface of the motor accommodating portion 2108. A plurality of recesses 88 are provided in the label area 78. The label 98 is attached to the label area 78 so as to cover the recesses 88.

[0271] As shown in Fig. 46, the motor accommodating portion 2108 has a protrusion 108 protruding from the inner surface of the motor accommodating portion 2108. The protrusion 108 protrudes leftward from the right part of the inner surface of the motor accommodating portion 2108. The recess 88 is provided on the outer surface of the thick part of the motor accommodating portion 2108 including the protrusion 108. The protrusion 108 is provided directly behind the recess 88. The protrusion 108 supports a stator core 2808 of the motor 608.

[0272] [Other embodiments] In the above-described embodiment, the power source for the power tool does not have to be the battery pack 25, and may be a commercial power source (AC power source). [Explanation of symbols]

[0273] 1A...power tool, 1B...power tool, 1C...power tool, 1D...power tool, 1E...power tool, 1F...power tool, 1G...power tool, 1H...power tool, 2...housing, 2L...left housing, 2R...right housing, 2S...screw, 3...rear cover, 4...hammer case (case), 4A...hammer case cover, 4B...bumper, 4F...front, 4R...rear, 5...battery mounting section, 6...motor, 7...reduction mechanism (power transmission mechanism), 8...spindle (power transmission mechanism), 8A...peripheral wall, 8B...supply port, 8C...internal space, 9...impact mechanism (power transmission mechanism, power conversion mechanism), 10...an Bill (output section), 10A... anvil body, 10B... anvil protrusion, 11... chuck sleeve, 12... fan, 13... controller, 14... trigger switch, 14A... trigger member, 14B... switch body, 15... forward / reverse switching lever, 16... operation panel, 17... mode switching switch, 18... light, 18L... first light, 18R... second light, 19... intake port, 20... exhaust port, 21... motor housing section, 22... grip section, 23... controller housing section, 24... bearing box (case), 24A... recess, 24B... recess, 25... battery pack, 26... stay 27...rotor, 28...stator core, 29...front insulator, 29S...screw, 30...rear insulator, 31...coil, 32...core portion, 33...shaft portion, 33F...front shaft portion, 33R...rear shaft portion, 34...rotor magnet, 35...sensor magnet, 37...sensor board, 37S...rotation detection element, 38...fusing terminal, 39...rotor bearing, 39F...front rotor bearing, 39R...rear rotor bearing, 40...thin portion, 41...pinion gear, 42...planetary gear, 42P...pin, 43...internal gear, 44...flange portion, 4 5...rod portion, 46...spindle bearing, 47...hammer, 47A...hammer body, 47B...hammer protrusion, 48...ball, 49...coil spring, 50...spindle groove, 51...hammer groove, 53...recess, 54...washer, 55...insertion hole, 56...anvil bearing, 57...hole, 58...hole, 60...thick portion, 60A...thin portion, 60B...thick portion, 61...bush, 63...opening, 64...impact force switch, 65...dedicated switch, 67...first portion, 68...second portion, 71...label area, 72...label area, 73...label area, 74...label area,75...label area, 76...label area, 77...label area, 78...label area, 81...recess, 81A...recess, 81B...recess, 81C...recess, 81D...recess, 81D1...recess, 81D2...recess, 81D3...recess, 81D4...recess, 81D5...recess, 81E...recess, 82...recess, 83...recess, 84...recess, 85...recess, 86...recess, 87...recess, 88...recess, 91...label, 91A...joining surface, 91B...printing surface, 92...label, 93...label, 94...label, 95...label, 96...label, 97...label, 98...label, 101...protruding portion, 101A...protruding portion, 101B... convex portion, 101C... convex portion, 101D... convex portion, 101E... convex portion, 102... convex portion, 103... convex portion, 104... convex portion, 105... convex portion, 106... convex portion, 107... convex portion, 108... convex portion, 202... housing, 203... housing, 204... housing, 205... housing, 206... housing, 208... housing, 300... rotor shaft, 301... tool holder, 302... cylinder, 303... crankshaft, 304... gear, 305... piston, 306... connecting rod, 307... air chamber, 308... striker, 309... impact bolt, 31 0...sensor unit, 311...rotation speed adjustment dial, 312...power transmission mechanism, 313...tool holder, 314...barrel unit, 315...motion conversion mechanism, 316...impact element, 317...rotation transmission mechanism, 318...intermediate shaft, 319...rotating body, 320...oscillating member, 321...piston cylinder, 322...rotor shaft, 323...cylinder, 324...striker, 325...impact bolt, 326...air chamber, 327...gear, 328...gear, 329...auxiliary handle, 330...conversion mechanism, 331...guide bar, 332...first blade, 333...second blade, 334...unlock Clever, 335...front grip part, 336...crank cam, 337...first connecting rod, 338...second connecting rod, 339...rotor shaft, 340...electronic parts, 341...base, 342...front tilt support part, 343...rear tilt support part, 344...fixed cover, 345...rotary blade, 346...base, 347...front support part, 348...rear support part, 349...fixed cover, 350...rotary blade, 351...main pipe, 352...cover, 353...front grip part, 354...bearing box, 355...cutting tool, 356...wheel cover,402...case, 403...case, 408...case, 502...battery mounting section, 503...battery mounting section, 504...battery mounting section, 505...battery mounting section, 506...battery mounting section, 507...battery mounting section, 508...battery mounting section, 602...motor, 603...motor, 604...motor, 605...motor, 606...motor, 607...motor, 608...motor, 902...impact mechanism, 1102...chuck sleeve, 1302...controller , 1303...controller, 1304...controller, 1305...controller, 1306...controller, 1307...controller, 1308...controller, 1402...trigger switch, 1403...trigger switch, 1404...trigger switch, 1405...trigger switch, 1406...trigger switch, 1407...trigger switch, 1408...trigger switch, 2102...motor housing, 2103...motor housing, 2104...motor housing portion, 2105...motor housing portion, 2106...motor housing portion, 2107...motor housing portion, 2108...motor housing portion, 2202...grip portion, 2203...grip portion, 2204...grip portion, 2205...grip portion, 2206...grip portion, 2207...grip portion, 2208...grip portion, 2302...controller housing portion, 2303...controller housing portion, 2304...controller housing portion, 2305...controller housing portion, 2306...controller Housing, 2307...controller housing, 2308...controller housing, 2402...main body housing, 2403...gear housing, 2803...stator core, 2806...stator core, 2807...stator core, 2808...stator core, A1...area, A2...area, Aa...area, Ab...area, AX...rotation axis, D...depth, D1...depth, D2...depth, Da...depth, Db...depth, T1...thickness, T2...thickness, Ta...thickness, Tb...thickness, R...diameter, G...spacing.

Claims

1. A motor; an output section driven by the motor; a housing made of synthetic resin including a motor accommodating portion for accommodating the motor; a recess provided in a label area defined on a portion of an outer surface of the housing; a label attached to the label area; The recesses are provided in a plurality of spaces in the label area, The opening of the recess is circular, The interval between adjacent recesses is greater than the diameter of the opening of the recess. Power tools.

2. The recess is provided in a plurality of spaces in the label area. The power tool according to claim 1.

3. A motor; an output section driven by the motor; a housing made of synthetic resin including a motor accommodating portion for accommodating the motor; a recess provided in a label area defined on a portion of an outer surface of the housing; a label attached to the label area; The housing includes a thin portion and a thick portion having a thickness greater than a thickness of the thin portion, The label area is defined to include an outer surface of the thin portion and an outer surface of the thick portion. Power tools.

4. The recess is provided on the outer surface of the thick portion. The power tool according to claim 3.

5. The recess is formed on each of an outer surface of the thin portion and an outer surface of the thick portion, the number of the recesses formed on the outer surface of the thick-walled portion is greater than the number of the recesses formed on the outer surface of the thin-walled portion; The power tool according to claim 3.

6. The recess is formed on each of an outer surface of the thin portion and an outer surface of the thick portion, a depth of the recess formed in the outer surface of the thick-walled portion is greater than a depth of the recess formed in the outer surface of the thin-walled portion; The power tool according to claim 3.

7. The recess is formed on each of an outer surface of the thin portion and an outer surface of the thick portion, an area of ​​an opening of the recess formed in the outer surface of the thick-walled portion is larger than an area of ​​an opening of the recess formed in the outer surface of the thin-walled portion; The power tool according to claim 3.

8. The housing has a protrusion protruding from an inner surface of the housing, The protrusion includes a first portion and a second portion protruding from the first portion, the thinned portion includes the first portion, The thickened portion includes the second portion. The power tool according to any one of claims 3 to 7.

9. The housing has a protrusion protruding from an inner surface of the housing, The thick portion includes the protrusion. The power tool according to any one of claims 3 to 7.

10. The protrusion is provided to extend in a first direction, The recessed portion is provided in a plurality of portions spaced apart from each other in the first direction. The power tool according to claim 8 or 9.

11. The protrusions are provided in a plurality of positions in a second direction perpendicular to the first direction, The recessed portion is provided in a plurality of portions spaced apart from each other in the second direction. The power tool according to claim 10.

12. The protrusion supports an internal member accommodated in the housing. A power tool according to any one of claims 8 to 11.

13. The internal member includes the motor. The power tool according to claim 12.

14. The internal member includes a controller that controls the motor. The power tool according to claim 12.

15. The internal member includes a metal case that houses a power transmission mechanism. The power tool according to claim 12.

16. The label area is defined on an outer surface of the motor housing portion. The power tool according to any one of claims 1 to 7.

17. the motor accommodating portion has a protrusion protruding from an inner surface of the motor accommodating portion, The protrusion supports the motor.

17. The power tool of claim 16.

18. A controller for controlling the motor is provided. the housing includes a controller accommodating portion that accommodates the controller, The label area is defined on an outer surface of the controller housing portion. The power tool according to any one of claims 1 to 7.

19. the controller housing portion has a protrusion protruding from an inner surface of the controller housing portion, The protrusion supports the controller.

20. The power tool of claim 18.

20. An impact driver, a hammer drill, a hedge trimmer, a cutter, a circular saw, a grass trimmer, or a grinder. A power tool according to any one of claims 1 to 19.

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