Electric work machine

Abstract

To suppress a situation where a worker can hardly recognize an object to be worked visually.SOLUTION: An electric work machine is equipped with: a motor; an output part that is actuated by rotation force of the motor; a light-emitting element arranged at least at a portion around the output part; an optical member which has an outer cylinder part arranged closer to outside in a radial direction than the light-emitting element and a light transmission part, arranged closer to a front side than the light-emitting element, through which light emitted from the light-emitting element passes; and a light shielding member arranged closer to outside in the radial direction than the outer cylinder part.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The technology disclosed in this specification relates to an electric operating machine. [Background technology]

[0002] 2. Description of the Related Art In the technical field relating to electric power tools, a lighting system for a power tool, such as that disclosed in Patent Document 1, is known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] US Patent Application Publication No. 2016 / 0354889 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the power tool lighting system includes chip on board light emitting diodes (COB LEDs). The brightness of light emitted from the chip on board light emitting diodes is high. When at least a part of the light emitted from the chip on board light emitting diodes is incident on the eyes of an operator, the operator feels dazzled, and as a result, the operator may have difficulty in viewing the object of the work.

[0005] The technology disclosed in this specification aims to prevent a worker from having difficulty visually recognizing a work target. [Means for solving the problem]

[0006] This specification discloses an electric working machine. The electric working machine may include a motor, an output unit, a light-emitting element, an optical member, and a light-shielding member. The output unit may be operated by a rotational force of the motor. The light-emitting element may be arranged on at least a portion of a periphery of the output unit. The optical member may have an outer cylinder portion and a light-transmitting portion. The outer cylinder portion may be arranged radially outward from the light-emitting element. The light-transmitting portion may be arranged forward from the light-emitting element. Light emitted from the light-emitting element may pass through the light-transmitting portion. The light-shielding member may be arranged radially outward from the outer cylinder portion. Effect of the Invention

[0007] According to the above configuration, it is possible to prevent the worker from having difficulty in visually recognizing the work target. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view from the front showing an electric operating machine according to this embodiment. [Diagram 2] FIG. 2 is a side view showing an upper portion of the electric operating machine according to this embodiment. [Diagram 3] FIG. 3 is a vertical cross-sectional view showing an upper portion of the electric operating machine according to this embodiment. [Figure 4] FIG. 4 is a cross-sectional view showing an upper portion of the electric operating machine according to this embodiment. [Diagram 5] FIG. 5 is a cross-sectional view showing a part of the light unit according to this embodiment. [Figure 6] FIG. 6 is an exploded perspective view, seen from the front, showing the upper part of the electric working machine according to this embodiment. [Figure 7] FIG. 7 is a perspective view showing the light unit according to this embodiment, seen from the front. [Figure 8] FIG. 8 is a perspective view showing the light unit according to this embodiment, seen from the rear. [Figure 9] FIG. 9 is an exploded perspective view showing the light unit according to this embodiment, as viewed from the front. [Figure 10]FIG. 10 is an exploded perspective view showing the light unit according to this embodiment, as seen from the rear. [Figure 11] FIG. 11 is a perspective view from the front showing an electric operating machine according to another embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In one or more embodiments, the electric operating machine may include a motor, an output unit, a light-emitting element, an optical member, and a light-shielding member. The output unit may be actuated by a rotational force of the motor. The light-emitting element may be disposed around at least a portion of the output unit. The optical member may have an outer cylinder portion and a light-transmitting portion. The outer cylinder portion may be disposed radially outward of the light-emitting element. The light-transmitting portion may be disposed forward of the light-emitting element. Light emitted from the light-emitting element may pass through the light-transmitting portion. The light-shielding member may be disposed radially outward of the outer cylinder portion.

[0010] In the above configuration, even if at least a part of the light emitted from the light emitting element passes through the outer tube, the light blocking member arranged radially outward from the outer tube prevents the light passing through the outer tube from entering the eyes of the worker. This prevents the worker from feeling glare. This prevents the worker from having difficulty in viewing the work object.

[0011] In one or more embodiments, the light transmission of the light blocking member may be lower than the light transmission of the optical member.

[0012] In the above configuration, even if at least a portion of the light emitted from the light-emitting element passes through the outer tube portion, the light-shielding member with low light transmittance prevents the light that has passed through the outer tube portion from entering the operator's eyes.

[0013] In one or more embodiments, the light blocking member may be made of a synthetic resin.

[0014] With the above configuration, damage to the light blocking member is suppressed.

[0015] In one or more embodiments, the light blocking member may be made of a polycarbonate resin containing colored pigments.

[0016] The above-mentioned configuration provides a light-shielding member that has high strength and light-shielding properties.

[0017] In one or more embodiments, the light blocking member may be black.

[0018] The above configuration provides a light-shielding member with high light-shielding properties.

[0019] In one or more embodiments, a first adhesive may be included to secure the optical member and the light blocking member together.

[0020] In the above configuration, the optical member and the light blocking member are fixed together by the first adhesive.

[0021] In one or more embodiments, the first adhesive may be disposed between an outer circumferential surface of the outer barrel portion and an inner circumferential surface of the light blocking member.

[0022] With the above configuration, the first adhesive is prevented from being exposed to the outer circumferential surface of the light blocking member.

[0023] In one or more embodiments, the optical element may have a groove recessed radially inward from an outer circumferential surface of the optical element, in which the first adhesive is disposed.

[0024] In the above configuration, an appropriate amount of the first adhesive is placed in the groove.

[0025] In one or more embodiments, the light blocking member may have a protrusion provided forward of the groove so as to protrude radially inward from an inner circumferential surface of the light blocking member.

[0026] In the above configuration, the first adhesive is blocked by the convex portion. This prevents the first adhesive from overflowing onto the front end of the light-shielding member or the front end of the optical member. For example, after the first adhesive is applied to the groove of the optical member, the light-shielding member is assembled into the outer periphery of the optical member. This prevents the first adhesive from overflowing.

[0027] In one or more embodiments, the inner ends of the protrusions may contact the optical element.

[0028] The above configuration effectively prevents the first adhesive from leaking to the front end of the light blocking member or the front end of the optical member.

[0029] In one or more embodiments, the protrusion may be provided to surround the optical element. The optical element may fit within the protrusion.

[0030] In the above configuration, the optical member is fitted into the convex portion, thereby fixing the optical member and the light blocking member.

[0031] In one or more embodiments, the front end of the light blocking member may be disposed around the exit surface of the light transmitting portion.

[0032] In the above configuration, the light emitted from the exit surface of the light transmitting portion is not blocked by the light blocking member, so that the work object is properly illuminated.

[0033] In one or more embodiments, in the front-to-rear direction, the front end of the light blocking member may be located at the same position as the front end of the light transmitting portion or further forward than the front end of the light transmitting portion.

[0034] In the above configuration, the outer peripheral surface of the optical member is sufficiently covered with the light blocking member.

[0035] In one or more embodiments, the electric operating machine may include a substrate having a circular ring disposed around the output portion, and the light emitting element may include an LED chip disposed on a front surface of the circular ring.

[0036] In the above configuration, the substrate and the LED chip constitute a chip-on-board light-emitting diode, which irradiates a high-brightness light onto a work object.

[0037] In one or more embodiments, the electric operating machine may include a second adhesive that secures the substrate and the optical member.

[0038] In the above configuration, the chip-on-board light emitting diode and the optical member are fixed together by the second adhesive.

[0039] In one or more embodiments, a second adhesive may secure the rear surface of the substrate and the inner periphery of the outer barrel.

[0040] The above configuration prevents the LED chip from being covered with the second adhesive.

[0041] In one or more embodiments, the second adhesive may be light-blocking.

[0042] The above configuration prevents light emitted from the LED chip from leaking from the rear of the substrate to the surroundings of the electric operating machine.

[0043] In one or more embodiments, the optical member may have an inner cylindrical portion disposed radially inward from the annular portion, and the light transmitting portion may be disposed to connect a front end of the outer cylindrical portion to a front end of the inner cylindrical portion.

[0044] In the above configuration, the outer cylinder portion of the optical member is disposed radially outside the annular portion, and the inner cylinder portion of the optical member is disposed radially inside the annular portion, so that the connection between the substrate and the optical member is stable.

[0045] In one or more embodiments, the output may include an anvil that is rotationally struck by a hammer.

[0046] In the above configuration, the light blocking member is applied to an impact tool.

[0047] Hereinafter, an embodiment will be described with reference to the drawings. In the embodiment, the positional relationship of each part will be described using the terms left, right, front, rear, top, and bottom. These terms indicate relative positions or directions based on the center of the electric operating machine.

[0048] [Electric work equipment] Fig. 1 is a front perspective view showing an electric working machine 1 according to this embodiment. Fig. 2 is a side view showing an upper part of the electric working machine 1 according to this embodiment. Fig. 3 is a vertical cross-sectional view showing an upper part of the electric working machine 1 according to this embodiment. Fig. 4 is a horizontal cross-sectional view showing an upper part of the electric working machine 1 according to this embodiment.

[0049] In this embodiment, the electric work machine 1 is an electric tool having an electric motor 6 as a power source. A direction parallel to the rotation axis AX of the motor 6 is appropriately referred to as the axial direction, a direction going around the rotation axis AX is appropriately referred to as the circumferential direction or the rotation direction, and a radial direction of the rotation axis AX is appropriately referred to as the radial direction. In the radial direction, a position close to or approaching the rotation axis AX is appropriately referred to as the radial inner side, and a position far from or away from the rotation axis AX is appropriately referred to as the radial outer side. In this embodiment, the rotation axis AX extends in the front-rear direction. One axial side is the front, and the other axial side is the rear.

[0050] In this embodiment, the electric operating machine 1 is an impact tool, which is a type of electric tool. In the following description, the electric operating machine 1 will be referred to as the impact tool 1 as appropriate.

[0051] In this embodiment, the impact tool 1 is an impact driver, which is a type of screw tightening tool. The impact tool 1 includes a housing 2, a rear cover 3, a hammer case 4, a case cover 5, a motor 6, a reduction mechanism 7, a spindle 8, a striking mechanism 9, an anvil 10, a tool holding mechanism 11, a fan 12, a battery mounting section 13, a trigger lever 14, a forward / reverse rotation switching lever 15, a hand mode switching button 16, and a light unit 18.

[0052] 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. 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.

[0053] The housing 2 has a motor accommodating portion 21, a grip portion 22, and a battery holding portion 23.

[0054] The motor accommodating portion 21 is cylindrical and accommodates the motor 6, a part of the bearing box 24, and the rear part of the hammer case 4.

[0055] The grip portion 22 protrudes downward from the motor housing portion 21. The trigger lever 14 is provided on an upper portion of the grip portion 22. The grip portion 22 is held by an operator.

[0056] The battery holding portion 23 is connected to a lower end portion of the grip portion 22. The outer dimensions of the battery holding portion 23 are larger than the outer dimensions of the grip portion 22 in both the front-rear direction and the left-right direction.

[0057] 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 on the inner peripheral side of the rear cover 3. The rear cover 3 is disposed so as to cover an opening at the rear end portion of the motor accommodating portion 21. The rear cover 3 is fixed to the rear end portion of the motor accommodating portion 21 with screws 3S.

[0058] 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.

[0059] The hammer case 4 functions as a gear case that houses the reduction mechanism 7. The hammer case 4 houses at least a part of the reduction mechanism 7, the spindle 8, the striking mechanism 9, and the anvil 10. The hammer case 4 is made of metal. In this embodiment, the hammer case 4 is made of aluminum. The hammer case 4 is cylindrical.

[0060] The hammer case 4 includes a rear cylinder portion 4A, a front cylinder portion 4B, and an annular portion 4C. The front cylinder portion 4B is disposed forward of the rear cylinder portion 4A. The outer diameter of the rear cylinder portion 4A is larger than the outer diameter of the front cylinder portion 4B. The inner diameter of the rear cylinder portion 4A is larger than the inner diameter of the front cylinder portion 4B. The annular portion 4C is disposed to connect the front end portion of the rear cylinder portion 4A and the rear end portion of the front cylinder portion 4B.

[0061] The hammer case 4 is connected to the front part of the motor housing section 21. A bearing box 24 is fixed to the rear part of the rear cylinder section 4A. At least a part of the reduction mechanism 7 is arranged inside the bearing box 24. A screw thread is formed on the outer periphery of the bearing box 24. A screw groove is formed on the inner periphery of the rear part of the rear cylinder section 4A. The screw thread of the bearing box 24 and the screw groove of the rear cylinder section 4A are coupled to each other, thereby fixing the bearing box 24 and the hammer case 4. The hammer case 4 is sandwiched between the left housing 2L and the right housing 2R. A part of the bearing box 24 and the rear part of the rear cylinder section 4A are housed in the motor housing section 21. The bearing box 24 is fixed to each of the motor housing section 21 and the hammer case 4.

[0062] The case cover 5 covers at least a portion of the surface of the hammer case 4. In this embodiment, the case cover 5 covers the surface of the rear cylinder portion 4A. The case cover 5 is made of synthetic resin. In this embodiment, the case cover 5 is made of polycarbonate resin. The case cover 5 protects the hammer case 4. The case cover 5 prevents contact between the hammer case 4 and objects around the impact tool 1. The case cover 5 prevents contact between the hammer case 4 and an operator.

[0063] The motor 6 is a power source of the impact tool 1. The motor 6 generates a rotational force. The motor 6 is an electric motor. The motor 6 is an inner rotor type brushless motor. The motor 6 has a stator 26 and a rotor 27. The stator 26 is supported by the motor accommodating portion 21. At least a portion of the rotor 27 is disposed inside the stator 26. The rotor 27 rotates relative to the stator 26. The rotor 27 rotates about a rotation axis AX extending in the front-rear direction.

[0064] The stator 26 includes a stator core 28 , a front insulator 29 , a rear insulator 30 , and a coil 31 .

[0065] 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.

[0066] 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.

[0067] 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.

[0068] The rotor 27 rotates about a rotation axis AX. The rotor 27 has a rotor core portion 32, a rotor shaft portion 33, a rotor magnet , and a sensor magnet .

[0069] The rotor core portion 32 and the rotor shaft portion 33 are each made of steel. In this embodiment, the rotor core portion 32 and the rotor shaft portion 33 are integral with each other. A front portion of the rotor shaft portion 33 protrudes forward from a front end surface of the rotor core portion 32. A rear portion of the rotor shaft portion 33 protrudes rearward from a rear end surface of the rotor core portion 32.

[0070] The rotor magnet 34 is fixed to the rotor core portion 32. The rotor magnet 34 is cylindrical. The rotor magnet 34 is disposed around the rotor core portion 32.

[0071] The sensor magnet 35 is fixed to the rotor core portion 32. The sensor magnet 35 is annular. The sensor magnet 35 is disposed on the front end surface of the rotor core portion 32 and the front end surface of the rotor magnet .

[0072] 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 circular circuit board, a magnetic sensor 37A supported by the circuit board, and a resin molded body 37B that covers the magnetic sensor 37A. At least a portion of the sensor board 37 faces the sensor magnet 35. The magnetic sensor 37A detects the position of the sensor magnet 35 to detect the position of the rotor 27 in the rotational direction.

[0073] A rear portion of the rotor shaft portion 33 is rotatably supported by a rotor bearing 39. A front portion of the rotor bearing 39 is rotatably supported by a rotor bearing 40. The rotor bearing 39 is held by the rear cover 3. The rotor bearing 40 is held by the bearing box 24. The front end portion of the rotor shaft portion 33 is disposed in the internal space of the hammer case 4 through an opening of the bearing box 24.

[0074] A pinion gear 41 is formed on the front end of the rotor shaft portion 33. The pinion gear 41 is connected to at least a part of the reduction mechanism 7. The rotor shaft portion 33 is connected to the reduction mechanism 7 via the pinion gear 41.

[0075] The reduction mechanism 7 transmits the rotational force of the motor 6 to the spindle 8 and the anvil 10. The reduction mechanism 7 is housed in the rear cylinder portion 4A of the hammer case 4. The reduction mechanism 7 has a plurality of gears. The reduction mechanism 7 is disposed forward of the motor 6. The reduction mechanism 7 connects the rotor shaft portion 33 and the spindle 8. The gears of the reduction mechanism 7 are driven by the rotor 27. 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 rotational speed lower than the rotational speed of the rotor shaft portion 33. The reduction mechanism 7 includes a planetary gear mechanism.

[0076] 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 housed in the hammer case 4 and the bearing box 24, respectively. 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 is always non-rotatable with respect to the bearing box 24.

[0077] When the rotor shaft portion 33 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 rotor shaft portion 33.

[0078] The spindle 8 rotates due to the rotational force of the motor 6. 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 is rotated by the rotor 27. The spindle 8 rotates due to the rotational force of the rotor 27 transmitted by the reduction mechanism 7.

[0079] The spindle 8 has a flange portion 8A and a spindle shaft portion 8B that protrudes forward from the flange portion 8A. The planetary gear 42 is rotatably supported on the flange portion 8A 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.

[0080] The spindle 8 is rotatably supported by a spindle bearing 44. The spindle bearing 44 is held in the bearing box 24. The spindle 8 has an annular portion 8C that protrudes rearward from the rear of the flange portion 8A. The spindle bearing 44 is disposed inside the annular portion 8C. In this embodiment, an outer ring of the spindle bearing 44 is connected to the annular portion 8C, and an inner ring of the spindle bearing 44 is supported by the bearing box 24.

[0081] The striking mechanism 9 is driven by the motor 6. The rotational force of the motor 6 is transmitted to the striking mechanism 9 via the reduction mechanism 7 and the spindle 8. The striking mechanism 9 strikes the anvil 10 in the rotational direction based on the rotational force of the spindle 8 rotated by the motor 6. 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.

[0082] The hammer 47 is disposed forward of the reduction mechanism 7. The hammer 47 is housed in the rear cylinder portion 4A. The hammer 47 is disposed around the spindle shaft portion 8B. The hammer 47 is held by the spindle shaft portion 8B. The ball 48 is disposed between the spindle shaft portion 8B and the hammer 47. The coil spring 49 is supported by each of the flange portion 8A and the hammer 47.

[0083] The hammer 47 is rotated by the motor 6. The rotational force of the motor 6 is transmitted to the hammer 47 via the reduction mechanism 7 and the spindle 8. The hammer 47 can rotate together with the spindle 8 based on the rotational force of the spindle 8 rotated by the motor 6. 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.

[0084] The ball 48 is made of a metal such as steel. The ball 48 is disposed between the spindle shaft portion 8B and the hammer 47. The spindle 8 has a spindle groove 8D in which at least a part of the ball 48 is disposed. The spindle groove 8D is provided on a part of the outer circumferential surface of the spindle shaft portion 8B. The hammer 47 has a hammer groove 47A in which at least a part of the ball 48 is disposed. The hammer groove 47A is provided on a part of the inner surface of the hammer 47. The ball 48 is disposed between the spindle groove 8D and the hammer groove 47A. The ball 48 can roll on the inside of the spindle groove 8D and the inside of the hammer groove 47A. The hammer 47 can move along 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 8D and the hammer groove 47A.

[0085] The coil spring 49 generates an elastic force that moves the hammer 47 forward. The coil spring 49 is disposed between the flange portion 8A and the hammer 47. A ring-shaped recess 47C is provided on the rear surface of the hammer 47. The recess 47C is recessed forward from the rear surface of the hammer 47. A washer 45 is provided inside the recess 47C. The rear end of the coil spring 49 is supported by the flange portion 8A. The front end of the coil spring 49 is disposed inside the recess 47C and supported by the washer 45.

[0086] The anvil 10 is an output part of the impact tool 1 that is actuated by the rotational force of the motor 6. The anvil 10 rotates by the rotational force of the motor 6. At least a part of the anvil 10 is disposed forward of the hammer 47. The anvil 10 has a tool hole 10A into which a tip tool 90 is inserted. An example of the tip tool 90 is a driver bit. The tool hole 10A is provided at the front end of the anvil 10. The tip tool 90 is attached to the anvil 10. In addition, a recess 10B is provided at the rear end of the anvil 10. A protrusion is provided at the front end of the spindle shaft portion 8B. The protrusion at the front end of the spindle shaft portion 8B is inserted into the recess 10B provided at the rear end of the anvil 10.

[0087] The anvil 10 has a rod-shaped anvil shaft portion 10C and an anvil protrusion portion 10D. The tool hole 10A is provided at the front end portion of the anvil shaft portion 10C. The tip tool 90 is attached to the anvil shaft portion 10C. The anvil protrusion portion 10D is provided at the rear end portion of the anvil 10. The anvil protrusion portion 10D protrudes radially outward from the rear end portion of the anvil shaft portion 10C.

[0088] The anvil 10 is rotatably supported by the anvil bearing 46. 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 aligned. The anvil 10 rotates around the rotation axis AX. The anvil bearing 46 is disposed inside the front cylindrical portion 4B. The anvil bearing 46 is held in the front cylindrical portion 4B of the hammer case 4. The anvil bearing 46 supports the anvil shaft portion 10C. In this embodiment, two anvil bearings 46 are disposed in the front-rear direction.

[0089] The hammer 47 has a hammer protrusion 47B that protrudes forward. The hammer protrusion 47B can come into contact with the anvil protrusion 10D. When the motor 6 is driven while the hammer protrusion 47B and the anvil protrusion 10D are in contact with each other, the anvil 10 rotates together with the hammer 47 and the spindle 8.

[0090] 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 each of the spindle groove 8D and the hammer groove 47A. The hammer 47 receives a force from the ball 48 and moves backward along with the ball 48. That is, the hammer 47 moves backward by the rotation of the spindle 8 while the rotation of the anvil 10 is stopped. As the hammer 47 moves rearward, the contact between the hammer projection 47B and the anvil projection 10D is released.

[0091] 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 10D while rotating. As a result, the anvil protrusion 10D 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.

[0092] The tool holding mechanism 11 is disposed around the front part of the anvil 10. The tool holding mechanism 11 holds the tool tip 90 inserted into the tool hole 10A.

[0093] The fan 12 rotates due to the rotational force of the motor 6. 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 fixed to at least a part of the rotor 27. The fan 12 is fixed to the rear part of the rotor shaft part 33 via a bush 12A. The fan 12 is disposed between the rotor bearing 39 and the stator 26. The fan 12 rotates due to the rotation of the rotor 27. As the rotor shaft part 33 rotates, the fan 12 rotates together with the rotor shaft part 33. 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, thereby cooling 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 into the external space of the housing 2.

[0094] The battery mounting section 13 is disposed below the battery holding section 23. The battery pack 25 is mounted to the battery mounting section 13. The battery pack 25 is detachable from the battery mounting section 13. The battery pack 25 functions as a power source for the impact tool 1. 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 13, the battery pack 25 can supply power to the impact tool 1. The motor 6 and the light unit 18 are each driven based on the power supplied from the battery pack 25.

[0095] The trigger lever 14 is provided on the grip portion 22. The trigger lever 14 is operated by an operator to start the motor 6. By operating the trigger lever 14, the motor 6 is switched between being driven and being stopped.

[0096] 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.

[0097] The hand mode switching button 16 is provided above the trigger lever 14. The hand mode switching button 16 is operated by an operator. A circuit board 16A and a switch 16B are arranged behind the hand mode switching button 16. The switch 16B is mounted on the front surface of the circuit board 16A. The hand mode switching button 16 is arranged in front of the switch 16B. When the hand mode switching button 16 is pressed backward, the switch 16B is actuated and an operation signal is output from the circuit board 16A. The operation signal output from the circuit board 16A is transmitted to a controller (not shown). The controller switches the control mode of the motor 6 based on the operation signal output from the circuit board 16A.

[0098] [Light unit] Fig. 5 is a cross-sectional view showing a part of the light unit 18 according to this embodiment. Fig. 6 is an exploded perspective view from the front showing the upper part of the impact tool 1 according to this embodiment. Fig. 7 is a perspective view from the front showing the light unit 18 according to this embodiment. Fig. 8 is a perspective view from the rear showing the light unit 18 according to this embodiment. Fig. 9 is an exploded perspective view from the front showing the light unit 18 according to this embodiment. Fig. 10 is an exploded perspective view from the rear showing the light unit 18 according to this embodiment.

[0099] The light unit 18 emits illumination light. The light unit 18 illuminates the anvil 10 and the periphery of the anvil 10 with the illumination light. The light unit 18 illuminates the front of the anvil 10 with the illumination light. The light unit 18 also illuminates the tip tool 90 attached to the anvil 10 and the periphery of the tip tool 90 with the illumination light.

[0100] The light unit 18 is disposed in the front part of the hammer case 4. The light unit 18 is disposed around the front cylinder portion 4B. The light unit 18 is disposed around the anvil shaft portion 10C via the front cylinder portion 4B.

[0101] The light unit 18 includes chip on board light emitting diodes 50 (COB LEDs).

[0102] The chip-on-board light-emitting diode 50 includes a substrate 51, an LED chip 52 as a light-emitting element, a bank 54, and a phosphor 55. Examples of the substrate 51 include an aluminum substrate, a glass cloth-based epoxy resin substrate (FR-4 substrate), and a composite substrate epoxy resin substrate (CEM-3 substrate). The LED chip 52 is mounted on the surface of the substrate 51. The LED chip 52 and the substrate 51 are connected via gold wires (not shown). The gold wires connect the LED chips 52 to each other. The bank 54 is provided on the surface of the substrate 51. The bank 54 is disposed around the LED chip 52. The bank 54 is disposed radially inward and radially outward from the LED chip 52. The bank 54 defines a partitioned space in which the phosphor 55 is disposed. The phosphor 55 is disposed so as to cover the LED chip 52 inside the bank 54. A pair of electrodes (not shown) are disposed on the surface of the substrate 51 outside the bank 54. The electrodes may be disposed on the rear surface of the substrate 51. Of the pair of electrodes, one electrode is a positive electrode and the other electrode is a negative electrode. Power output from the battery pack 25 is supplied to the electrodes. The power supplied to the electrodes is supplied to the LED chip 52 via the substrate 51 and the gold wires. The LED chip 52 emits light based on the power supplied from the battery pack 25. The voltage of the battery pack 25 is stepped down to 5V by a controller (not shown) and applied to the LED chip 52.

[0103] The light unit 18 includes a chip-on-board light-emitting diode 50, an optical member 57, and a light-shielding member 60. The chip-on-board light-emitting diode 50 includes a substrate 51, a plurality of LED chips 52, a bank 54, and a phosphor 55.

[0104] The base plate 51 is annular. The base plate 51 is disposed around the anvil shaft portion 10C via the front cylinder portion 4B. The base plate 51 has an annular portion 51A and a support portion 51B that protrudes downward from a lower portion of the annular portion 51A.

[0105] The LED chip 52 is disposed on the front surface of the annular portion 51A of the substrate 51. The LED chip 52 is disposed on at least a part of the circumference of the anvil shaft portion 10C via the front side cylinder portion 4B. A plurality of LED chips 52 are disposed at intervals in the circumferential direction of the annular portion 51A. In this embodiment, 12 LED chips 52 are disposed at equal intervals in the circumferential direction of the annular portion 51A. The LED chips 52 are disposed at positions of 0°, 30°, 60°, 90°, 120°, 150°, 180°, 210°, 240°, 270°, 300°, and 330° around the rotation axis AX. The position of 0° is a position directly above the rotation axis AX (anvil shaft portion 10C). The position of 180° is a position directly below the rotation axis AX (anvil shaft portion 10C).

[0106] In addition, a resistor 59 is disposed between a pair of adjacent LED chips 52 .

[0107] The bank 54 is provided on the front surface of the annular portion 51A of the substrate 51. The bank 54 protrudes forward from the front surface of the annular portion 51A. The bank 54 defines a partitioned space in which the phosphor 55 is disposed. The bank 54 is annular. In this embodiment, the bank 54 is provided to have a double annular shape. That is, in this embodiment, the bank 54 includes a first annular bank 54 provided on the front surface of the annular portion 51A and a second annular bank 54 provided on the front surface of the annular portion 51A radially outward from the first bank 54. The first bank 54 is disposed radially inward from the LED chip 52. The second bank 54 is disposed radially outward from the LED chip 52. The LED chips 52 are disposed between the first bank 54 and the second bank 54.

[0108] The phosphor 55 is disposed on the front surface of the annular portion 51A of the substrate 51. The phosphor 55 is annular. The phosphor 55 is disposed between the first bank 54 and the second bank 54 so as to cover each of the LED chips 52.

[0109] A pair of lead wires 58 are connected to the substrate 51. The above-mentioned electrodes are connected to the lead wires 58. The pair of lead wires 58 are supported on the rear surface of the support portion 51B. Alternatively, the lead wires 58 may be supported on the front surface of the support portion 51B.

[0110] The current output from the battery pack 25 is supplied to the electrodes via a controller (not shown) and lead wires 58. The voltage of the battery pack 25 is stepped down by the controller (not shown) and then applied to the electrodes. The current supplied to the electrodes is supplied to the LED chip 52 via the substrate 51 and gold wires. The LED chip 52 emits light based on the current supplied from the battery pack 25.

[0111] The optical member 57 is connected to the chip-on-board light emitting diode 50. The optical member 57 is fixed to the substrate 51. The optical member 57 is made of polycarbonate resin. In this embodiment, the optical member 57 is made of polycarbonate resin containing a white diffusing material. At least a portion of the optical member 57 is disposed forward of the chip-on-board light emitting diode 50. The optical member 57 has an outer cylinder portion 57A, an inner cylinder portion 57B, a light transmitting portion 57C, and a convex portion 57D.

[0112] The outer cylinder portion 57A is disposed radially outward of the inner cylinder portion 57B. The outer cylinder portion 57A is disposed radially outward of the LED chip 52. In the radial direction, at least a portion of the chip-on-board light-emitting diode 50 is disposed between the outer cylinder portion 57A and the inner cylinder portion 57B. The outer cylinder portion 57A is disposed radially outward of the annular portion 51A of the substrate 51. The inner cylinder portion 57B is disposed radially inward of the annular portion 51A of the substrate 51. The inner cylinder portion 57B is disposed radially inward of the LED chip 52.

[0113] The light transmitting portion 57C has an annular shape. The light transmitting portion 57C is disposed forward of the LED chip 52. The light transmitting portion 57C is disposed so as to connect the front end of the outer tube portion 57A and the front end of the inner tube portion 57B. The light transmitting portion 57C faces the front surface of the annular portion 51A. The light transmitting portion 57C faces the LED chip 52. The light emitted from the LED chip 52 passes through the light transmitting portion 57C and is irradiated forward of the light unit 18.

[0114] The light transmitting portion 57C has an incident surface 57E through which light from the LED chip 52 enters, and an exit surface 57F through which light transmitted through the light transmitting portion 57C exits. The front surface of the annular portion 51A faces the incident surface 57E of the light transmitting portion 57C. The incident surface 57E faces the LED chip 52. The incident surface 57E faces substantially backward. The exit surface 57F faces substantially forward.

[0115] The protrusion 57D is provided so as to protrude downward from the lower part of the outer cylinder portion 57A. An accommodation space is formed inside the protrusion 57D. The support portion 51B of the substrate 51 is disposed in the accommodation section formed inside the protrusion 57D.

[0116] The light shielding member 60 is disposed radially outward of the outer tube portion 57A of the optical member 57. The light shielding member 60 has a lower light transmittance than the optical member 57. At least a portion of the light emitted from the LED chip 52 may pass through the outer tube portion 57A. The light shielding member 60 blocks the light from the LED chip 52 emitted from the outer circumferential surface of the outer tube portion 57A. The light shielding member 60 prevents the light from the LED chip 52 emitted from the outer circumferential surface of the outer tube portion 57A from being irradiated to the periphery of the optical member 57.

[0117] The light shielding member 60 is made of synthetic resin. In this embodiment, the light shielding member 60 is made of polycarbonate resin. The light shielding member 60 is made of polycarbonate resin containing a colored pigment. Examples of the dominant pigment include a black pigment and a gray pigment. In this embodiment, the light shielding member 60 is made of polycarbonate resin containing a black pigment. The light shielding member 60 is black. The light shielding member 60 may be made of polycarbonate resin containing a gray pigment. The light shielding member 60 may be gray.

[0118] The light blocking member 60 has a tube portion 60A and a protrusion portion 60B. The tube portion 60A is arranged so as to surround the outer tube portion 57A. The tube portion 60A covers the outer peripheral surface of the outer tube portion 57A. The protrusion portion 60B protrudes downward from the lower portion of the tube portion 60A. The protrusion portion 60B covers the outer surface of the protrusion portion 57D. The protrusion portion 60B is arranged so as to cover the protrusion portion 57D from below.

[0119] The light blocking member 60 is fixed to the optical member 57. In this embodiment, the optical member 57 and the light blocking member 60 are fixed by a first adhesive 70. The first adhesive 70 is disposed between the outer peripheral surface of the outer tube portion 57A and the inner peripheral surface of the tube portion 60A.

[0120] In this embodiment, the light blocking member 60 has grooves 60D and 60E recessed radially outward from the inner circumferential surface of the tube portion 60A. The groove 60D is provided rearward of the groove 60E. In the front-rear direction, an abutting surface 60C is provided at the boundary between the groove 60D and the groove 60E. The abutting surface 60C faces rearward. The abutting surface 60C is annular. The optical member 57 has an opposing surface 57T facing the abutting surface 60C. The optical member 57 has grooves 57V and 57W recessed radially inward from the outer circumferential surface of the optical member 57. The groove 57V is provided rearward of the groove 57W. The opposing surface 57T is provided at the boundary between the groove 57V and the groove 57W. The opposing surface 57T faces forward. The abutment surface 60C and the opposing surface 57T are in contact with each other. The first adhesive 70 is filled inside the groove 60D and inside the groove 60E. The first adhesive 70 is filled inside the groove 57V and inside the groove 57W. The first adhesive 70 is stored in the space between the groove 60D and the groove 57V and the space between the groove 60E and the groove 57W. The optical member 57 and the light blocking member 60 are fixed together by the first adhesive 70 filled in the groove 57V and the groove 57W.

[0121] Further, the light blocking member 60 has a convex portion 60G provided so as to protrude radially inward from the inner peripheral surface of the tube portion 60A forward of the groove portions 60D, 60E, 57V, and 57W. The radial inner end portion of the convex portion 60G contacts the outer peripheral surface of the optical member 57. The convex portion 60G is provided so as to surround the optical member 57. The optical member 57 fits inside the convex portion 60G.

[0122] The front end 60F of the light blocking member 60 is disposed around the emission surface 57F of the light transmitting portion 57C. The front end 60F of the light blocking member 60 is disposed forward of the front end of the light transmitting portion 57C. Note that, in the front-rear direction, the front end 60F of the light blocking member 60 may be disposed at the same position as the front end of the light transmitting portion 57C. This makes it difficult for light to leak radially outward from the optical member 57.

[0123] The light unit 18, which includes a chip-on-board light emitting diode 50 and a light blocking member 60, is disposed around the anvil shaft portion 10C of the anvil 10. The light unit 18 is disposed around the front cylinder portion 4B of the hammer case 4. The inner cylinder portion 57B of the optical member 57 is disposed around the front cylinder portion 4B of the hammer case 4. The inner cylinder portion 57B of the optical member 57 is supported by the front cylinder portion 4B of the hammer case 4. The inner cylinder portion 57B of the optical member 57 is fixed to the front cylinder portion 4B of the hammer case 4 so as not to be movable in the axial direction.

[0124] In the radial direction, the substrate 51 is disposed between the outer cylinder portion 57A and the inner cylinder portion 57B. The substrate 51 is fixed to the optical member 57. As shown in FIG. 5, the substrate 51 and the optical member 57 are fixed by a second adhesive 75. The second adhesive 75 fixes the rear surface of the substrate 51 to the inner peripheral surface of the outer cylinder portion 57A. The second adhesive 75 may also fix the rear surface of the substrate 51 to the outer peripheral surface of the inner cylinder portion 57B. The second adhesive 75 has light-blocking properties. In this embodiment, the second adhesive 75 is a black adhesive.

[0125] As shown in Fig. 5 and Fig. 6, a protrusion 4D is provided on the outer peripheral surface of the front cylinder portion 4B. The protrusion 4D protrudes radially outward from the outer peripheral surface of the front cylinder portion 4B. A plurality of protrusions 4D are provided at intervals in the circumferential direction. In this embodiment, four protrusions 4D are provided at intervals in the circumferential direction. The surface of the protrusion 4D includes a rear surface 4E facing rearward and an inclined surface 4F that slopes radially inward toward the front.

[0126] The light unit 18 is supported by the front cylinder portion 4B of the hammer case 4. A rear slide portion 57M and a front slide portion 57N are provided on the inner peripheral surface of the inner cylinder portion 57B of the optical member 57. The rear slide portion 57M and the front slide portion 57N each protrude radially inward from the inner peripheral surface of the inner cylinder portion 57B. The front slide portion 57N is disposed forward of the rear slide portion 57M. Four rear slide portions 57M are provided at intervals in the circumferential direction. The front slide portion 57N is disposed forward of each of the four rear slide portions 57M. A recess 57K is provided between the rear slide portion 57M and the front slide portion 57N. The convex portion 4D is disposed inside the recess 57K. The rear slide portion 57M has a front surface 57P that contacts the rear surface 4E of the convex portion 4D. The front slide portion 57N has a slope 57Q that faces the slope 4F of the protrusion 4D.

[0127] An insertion opening is provided between one circumferential end of the rear slide portion 57M and the front slide portion 57N. The convex portion 4D is disposed in the recess 57K through the insertion opening. After the convex portion 4D is inserted into the insertion opening, the light unit 18 is rotated so that the convex portion 4D is inserted into the inside of the recess 57K. This fixes the optical member 57 and the front cylinder portion 4B of the hammer case 4. By fixing the optical member 57 and the front cylinder portion 4B of the hammer case 4, the light unit 18 and the hammer case 4 are fixed.

[0128] Light emitted from the LED chip 52 is incident on the incident surface 57E via the phosphor 55. As shown in Fig. 5 and other figures, the incident surface 57E is inclined forward toward the inside in the radial direction. The light incident on the incident surface 57E passes through the light transmitting portion 57C and then is emitted from the emission surface 57F.

[0129] At least a portion of the light incident on incident surface 57E reaches inclined surface 57Q. Inclined surface 57Q is inclined forward toward the inside in the radial direction. The light that reaches inclined surface 57Q is totally reflected by inclined surface 57Q and travels forward. The light totally reflected by inclined surface 57Q is emitted from emission surface 57F.

[0130] In this embodiment, the sponge ring 80 is disposed behind the chip-on-board light-emitting diode 50. The rear surface of the sponge ring 80 is supported by the annular portion 4C of the hammer case 4. At least a portion of the sponge ring 80 contacts the light unit 18 in a compressed state. In the example shown in FIG. 5, the sponge ring 80 contacts the inner cylinder portion 57B of the optical member 57 and the second adhesive 75. The light unit 18 is supported by the compressed sponge ring 80, so that rattling of the light unit 18 relative to the hammer case 4 is suppressed. The sponge ring 80 may support the inner cylinder portion 57B.

[0131] [Assembly method] When assembling the light unit 18, first, the light shielding member 60 is attached to the optical member 57. When attaching the light shielding member 60 to the optical member 57, the optical member 57 is placed on a predetermined support surface so that the emission surface 57F faces upward. After the optical member 57 is placed on the support surface, a first adhesive 70 is applied to the outer peripheral surface of the optical member 57 including the facing surface 57T. In this embodiment, the first adhesive 70 is applied to the grooves 57V and 57W. After the first adhesive 70 is applied to the grooves 57V and 57W, the light shielding member 60 is inserted into the optical member 57 from above the optical member 57. Note that the first adhesive 70 may be applied to the grooves 60D and 60E of the light shielding member 60, and then the light shielding member 60 may be inserted into the optical member 57. By inserting the light shielding member 60 into the optical member 57, the abutment surface 60C and the facing surface 57T come into contact with each other. Also, the front part of the optical member 57 fits into the convex part 60G. The optical member 57 is lightly pressed into the inside of the convex part 60G. By lightly pressing the light shielding member 60 into the optical member 57, the first adhesive 70 spreads in the grooves 57V and 57W. Since the first adhesive 70 applied to the grooves 57V and 57W is difficult to move upward, even if the light shielding member 60 is inserted into the optical member 57, it does not reach the emission surface 57F. In addition, the radial inner end of the convex part 60G contacts the outer circumferential surface of the optical member 57, so that the first adhesive 70 applied to the grooves 57V and 57W is prevented from reaching the emission surface 57F. Although at least a part of the first adhesive 70 may flow into the gap between the rear end (lower end) of the outer tube portion 57A of the optical member 57 and the rear end of the inner circumferential surface of the light blocking member 60, it does not flow into the emission surface 57F, and therefore the emission surface 57F is prevented from being contaminated by the first adhesive 70. Furthermore, since the first adhesive 70 does not adhere to the emission surface 57F, the light emitted from the emission surface 57F is prevented from being obstructed by the first adhesive 70. Furthermore, the substrate 51 and the optical member 57 are fixed by the second adhesive 75.

[0132] After the optical member 57, the light blocking member 60, and the chip-on-board light emitting diode 50 are fixed by the first adhesive 70 and the second adhesive 75, the light unit 18 and the hammer case 4 are fixed. As described above, the convex portion 4D is inserted into the insertion opening provided between the end of the rear slide portion 57M on one side in the circumferential direction and the front slide portion 57N, and then the light unit 18 is rotated so that the convex portion 4D is inserted into the inside of the recess 57K. This fixes the light unit 18 and the hammer case 4. The sponge ring 80 supported by the annular portion 4C comes into contact with at least a part of the light unit 18, thereby suppressing rattling of the light unit 18 relative to the hammer case 4. By fixing the inner cylinder portion 57B of the optical member 57 to the front cylinder portion 4B of the hammer case 4, the light unit 18 is fixed to the hammer case 4 only in the axial direction, and then the hammer case 4 and the convex portion 60B of the light blocking member 60 are sandwiched between the left housing 2L and the right housing 2R, and the hammer case 4 and the light unit 18 are fixed in the rotational direction relative to the housing 2. After that, the left housing 2L and the right housing 2R are fixed together by the screw 2S.

[0133] [How to use] When the trigger lever 14 is operated by an operator, the motor 6 starts and light is emitted from the LED chip 52 of the chip-on-board light-emitting diode 50. The light emitted from the chip-on-board light-emitting diode 50 has high brightness and can brightly illuminate the work target.

[0134] On the other hand, if at least a part of the light emitted from the LED chip 52 passes through the outer cylinder portion 57A, when the light emitted from the outer peripheral surface of the outer cylinder portion 57A enters the eyes of the worker, the worker may feel dazzled, and as a result, it may become difficult to visually recognize the work target. In this embodiment, the light shielding member 60 prevents the worker from feeling dazzled.

[0135] [effect] As described above, in this embodiment, the impact tool 1 includes the motor 6, the anvil 10 serving as an output unit, the LED chip 52, the optical member 57, and the light-shielding member 60. The anvil 10 is actuated by the rotational force of the motor 6. The LED chip 52 is disposed at least partially around the anvil 10. The optical member 57 has an outer cylinder portion 57A and a light-transmitting portion 57C. The outer cylinder portion 57A is disposed radially outward from the LED chip 52. The light-transmitting portion 57C is disposed forward from the LED chip 52. The light emitted from the LED chip 52 passes through the light-transmitting portion 57C. The light-shielding member 60 is disposed radially outward from the outer cylinder portion 57A.

[0136] In the above configuration, even if at least a part of the light emitted from the LED chip 52 passes through the outer cylinder portion 57A, the light shielding member 60 arranged radially outward of the outer cylinder portion 57A prevents the light passing through the outer cylinder portion 57A from entering the eyes of the worker. This prevents the worker from feeling dazzled. This prevents the worker from having difficulty in viewing the work target.

[0137] In this embodiment, the light transmittance of the light blocking member 60 is lower than the light transmittance of the optical member 57 .

[0138] In the above configuration, even if at least a portion of the light emitted from the LED chip 52 passes through the outer tube portion 57A, the light-shielding member 60, which has a low light transmittance, prevents the light that has passed through the outer tube portion 57A from entering the operator's eyes.

[0139] In this embodiment, the light blocking member 60 is made of synthetic resin.

[0140] In the above configuration, damage to the light blocking member 60 is suppressed compared to when the light blocking member 60 is made of, for example, glass.

[0141] In this embodiment, the light blocking member 60 is made of polycarbonate resin containing a colored pigment.

[0142] With the above-described configuration, the light-shielding member 60 having high strength and light-shielding properties is provided.

[0143] In this embodiment, the light blocking member 60 is black.

[0144] In the above-described configuration, the light-shielding member 60 having high light-shielding properties is provided.

[0145] In this embodiment, a first adhesive 70 is provided to fix the optical member 57 and the light blocking member 60 together.

[0146] In the above configuration, the optical member 57 and the light blocking member 60 are fixed together by the first adhesive 70.

[0147] In this embodiment, the first adhesive 70 is disposed between the outer circumferential surface of the outer tubular portion 57A and the inner circumferential surface of the light blocking member 60.

[0148] In the above configuration, the first adhesive 70 is prevented from being exposed to the outer peripheral surface of the light blocking member 60.

[0149] In this embodiment, the optical member 57 has grooves 57V and 57W recessed radially inward from the outer circumferential surface of the optical member 57, in which the first adhesive 70 is disposed.

[0150] In the above configuration, an appropriate amount of the first adhesive 70 is placed in the grooves 57V and 57W.

[0151] In this embodiment, the light blocking member 60 has a protrusion 60G provided so as to protrude radially inward from the inner circumferential surface of the light blocking member 60 in front of the grooves 57V and 57W.

[0152] In the above configuration, the first adhesive 70 is blocked by the convex portion 60G. This prevents the first adhesive 70 from overflowing onto the front end of the light blocking member 60 or the front end of the optical member 57. For example, after the first adhesive 70 is applied to the groove portion 57V and the groove portion 57W of the optical member 57, the light blocking member 60 is assembled into the outer periphery of the optical member 57. This prevents the first adhesive 70 from overflowing.

[0153] In this embodiment, the inner end of the convex portion 60G comes into contact with the optical member 57.

[0154] In the above configuration, the first adhesive 70 is effectively prevented from leaking to the front end of the light blocking member 60 or the front end of the optical member 57.

[0155] In this embodiment, the convex portion 60G is provided so as to surround the optical member 57. The optical member 57 fits into the convex portion 60G.

[0156] In the above configuration, the optical member 57 fits into the convex portion 60G, thereby fixing the optical member 57 and the light blocking member 60. In this embodiment, the optical member 57 is lightly press-fitted into the convex portion 60G.

[0157] In this embodiment, the front end 60F of the light blocking member 60 is disposed around the exit surface 57F of the light transmitting portion 57C.

[0158] In the above configuration, the light emitted from the emission surface 57F of the light transmitting portion 57C is not blocked by the light blocking member 60, so that the work target is properly illuminated.

[0159] In this embodiment, in the front-rear direction, a front end 60F of the light blocking member 60 is disposed at the same position as the front end of the light transmitting portion 57C or further forward than the front end of the light transmitting portion 57C.

[0160] In the above configuration, the outer peripheral surface of the optical member 57 is sufficiently covered with the light blocking member 60 .

[0161] In this embodiment, the impact tool 1 includes a substrate 51 having an annular portion 51A that is disposed around the anvil 10. The LED chip 52 is disposed on the front surface of the annular portion 51A.

[0162] In the above configuration, the substrate 51 and the LED chip 52 constitute a chip-on-board light-emitting diode 50. This allows high-luminance light to be irradiated onto the work target.

[0163] In this embodiment, the impact tool 1 includes a second adhesive 75 that fixes the substrate 51 and the optical member 57 together.

[0164] In the above configuration, the chip-on-board light emitting diode 50 and the optical member 57 are fixed together by the second adhesive 75 .

[0165] In this embodiment, the second adhesive 75 fixes the rear surface of the substrate 51 and the inner circumferential surface of the outer cylinder portion 57A.

[0166] In the above configuration, the LED chip 52 is prevented from being covered with the second adhesive 75.

[0167] In this embodiment, the second adhesive 75 has light blocking properties.

[0168] The above configuration prevents the light emitted from the LED chip 52 from leaking from the rear of the substrate 51 to the surroundings of the impact tool 1. For example, even if the case cover 5 is transparent, the light leaking from the LED chip 52 to the rear of the substrate 51 is blocked by the second adhesive 75, so that the light is prevented from leaking to the surroundings of the impact tool 1 through the case cover 5.

[0169] In this embodiment, the impact tool 1 includes a phosphor 55 that covers the LED chip 52 .

[0170] In the above configuration, the luminance of the light emitted from the LED chip 52 is amplified by the phosphor 55. In addition, the phosphor 55 protects the LED chip 52.

[0171] In this embodiment, the optical member 57 has an inner cylinder portion 57B disposed radially inward from the annular portion 51 A. The light transmitting portion 57C is disposed to connect the front end of the outer cylinder portion 57A and the front end of the inner cylinder portion 57B.

[0172] In the above configuration, the outer tube portion 57A of the optical member 57 is positioned radially outside the annular portion 51A, and the inner tube portion 57B of the optical member 57 is positioned radially inside the annular portion 51A, thereby stabilizing the connection between the substrate 51 and the optical member 57.

[0173] [Other embodiments] In the above embodiment, the light blocking member 60 is made of polycarbonate resin containing a colored pigment. The light blocking member 60 may have a black coating film applied to the surface of a member made of polycarbonate resin. The light blocking member 60 may also be made of rubber, elastomer, or metal.

[0174] In the above-described embodiment, the impact tool 1 is an impact driver. The impact tool 1 may be an impact wrench.

[0175] In the above embodiment, the electric work machine 1 is an impact tool, which is a type of electric tool. The electric tool is not limited to an impact tool. Examples of the electric tool include a driver drill, an angle drill, a screwdriver, a hammer, a hammer drill, a circular saw, and a reciprocating saw.

[0176] The electric working machine 1 does not have to be an electric tool. FIG. 11 is a front perspective view showing an electric working machine 100 according to another embodiment. The electric working machine 100 shown in FIG. 11 is an air duster. The electric working machine 100 includes a housing 200, a battery mounting section 130, a trigger switch 140, an output section 1000, and a light unit 18. The housing 200 includes a motor housing section 210, a grip section 220 extending downward from a lower section of the motor housing section 210, and a battery holding section 230 connected to a lower section of the grip section 220. The motor housing section 210 houses a motor and a fan (not shown in FIG. 11). The trigger switch 140 is disposed in the grip section 220. The battery mounting section 130 is disposed in a lower section of the battery holding section 230. A battery pack 25 is attached to the battery mounting section 130. The output section 1000 is operated by the rotational force of the motor. The output part 1000 is disposed forward of the front end part of the motor housing part 210. When the motor rotates, the fan rotates, and as a result, air is sprayed from the nozzle 1000A of the output part 1000. The light unit 18 described in the above embodiment may be disposed around the output part 1000 of the electric operating machine 100.

[0177] In the above-described embodiment, the power source for the electric operating machine (1, etc.) does not have to be the battery pack 25, and may be a commercial power source (AC power source). [Explanation of symbols]

[0178] 1...Electric work machine (impact tool), 2...Housing, 2L...Left housing, 2R...Right housing, 2S...Screw, 3...Rear cover, 3S...Screw, 4...Hammer case, 4A...Rear cylinder part, 4B...Front cylinder part, 4C...Annular part, 4D...Convex part, 4E...Rear surface, 4F...Slope, 5...Case cover, 6...Motor, 7...Reduction mechanism, 8...Spindle, 8A...Flange part, 8B...Spindle shaft part, 8C...Annular part, 8D...Spindle groove, 9...Impact mechanism, 10...Anvil (output part), 10A...Tool hole, 10B...Concave part, 10C...Anvil shaft part, 10D...Anvil protrusion part, 11 ...tool holding mechanism, 12...fan, 12A...bush, 13...battery mounting section, 14...trigger lever, 15...forward / reverse switching lever, 16...hand mode switching button, 16A...circuit board, 16B...switch, 18...light unit, 19...air intake, 20...air exhaust, 21...motor housing section, 22...grip section, 23...battery holding section, 24...bearing box, 25...battery pack, 26...stator, 27...rotor, 28...stator core, 29...front insulator, 29S...screw, 30...rear insulator, 31...coil, 32...rotor core section, 33...rotor core section Shaft portion, 34... rotor magnet, 35... sensor magnet, 37... sensor board, 37A... magnetic sensor, 37B... resin molded body, 38... fusing terminal, 39... rotor bearing, 40... rotor bearing, 41... pinion gear, 42... planetary gear, 42P... pin, 43... internal gear, 44... spindle bearing, 45... washer, 46... anvil bearing, 47... hammer, 47A... hammer groove, 47B... hammer protrusion, 47C... recess, 48... ball, 49... coil spring, 50... chip-on-board light-emitting diode, 51... board, 51A... circle Ring portion, 51B...support portion, 52...LED chip (light emitting element), 54...bank, 55...phosphor, 57...optical member, 57A...outer cylinder portion, 57B...inner cylinder portion, 57C...light transmitting portion, 57D...convex portion, 57E...entrance surface, 57F...exiting surface, 57K...concave portion, 57M...rear slide portion, 57N...front slide portion, 57P...front surface, 57Q...inclined surface, 57T...opposing surface, 57V...groove portion, 57W...groove portion, 58...lead wire, 59...resistor, 60...light shielding member, 60A...cylinder portion, 60B...convex portion, 60C...butting surface, 60D...groove portion, 60E...groove portion, 60F...front end portion, 60G...convex portion, 70...first adhesive,75: second adhesive, 80: sponge ring, 90: tip tool, 100: electric work machine, 130: battery mounting section, 140: trigger switch, 200: housing, 210: motor accommodating section, 220: grip section, 230: battery holding section, 1000: output section, 1000A: injection nozzle, AX: rotating shaft.

Claims

1. A motor, An output unit that operates by the rotational force of the motor, A light-emitting element disposed at at least a part around the output unit, An outer cylinder portion disposed radially outside the light-emitting element, and a light-transmitting portion disposed in front of the light-emitting element through which the light emitted from the light-emitting element passes, an optical member having the same, A light-shielding member that shields light emitted radially outward from the outer peripheral surface of the outer cylinder portion, An electric working machine.

2. The light transmittance of the light-shielding member is lower than the light transmittance of the optical member, The electric working machine according to Claim 1.

3. The light-shielding member is made of synthetic resin, The electric working machine according to Claim 1.

4. The light-shielding member is made of polycarbonate resin containing a colored pigment, The electric working machine according to Claim 1.

5. The light-shielding member is black, The electric working machine according to Claim 1.

6. The light-shielding member is a coating film, The electric working machine according to Claim 1.

7. The light-shielding member is fixed to the optical member, The electric working machine according to Claim 6.

8. A first adhesive for fixing the optical member and the light-shielding member is provided, The electric working machine according to Claim 1.

9. The first adhesive is disposed between the outer peripheral surface of the outer cylinder portion and the inner peripheral surface of the light-shielding member, The electric working machine according to Claim 8.

10. The optical member is provided so as to be recessed radially inward from the outer peripheral surface of the optical member, and has a groove portion in which the first adhesive is disposed, The electric working machine according to Claim 9.

11. The light-shielding member has a convex portion provided so as to protrude radially inward from the inner peripheral surface of the light-shielding member in front of the groove portion, The electric working machine according to Claim 10.

12. The inner end portion of the convex portion contacts the optical member, The electric working machine according to Claim 11.

13. The convex portion is provided so as to surround the optical member, The optical member fits into the convex portion, The electric working machine according to Claim 12.

14. The front end portion of the light-shielding member is disposed around the light-emitting surface of the light-transmitting portion, The electric working machine according to Claim 1.

15. In the front-rear direction, the front end portion of the light-shielding member is disposed at the same position as the front end portion of the light-transmitting portion or in front of the front end portion of the light-transmitting portion, The electric working machine according to Claim 1.

16. A substrate having an annular portion disposed around the output unit is provided, The light-emitting element includes an LED chip disposed on the front surface of the annular portion. The electric working machine according to claim 1.

17. It includes a second adhesive for fixing the substrate and the optical member. The electric working machine according to claim 16.

18. The second adhesive fixes the rear surface of the substrate and the inner peripheral surface of the outer cylindrical portion. The electric working machine according to claim 17.

19. The second adhesive is light-shielding. The electric working machine according to claim 17.

20. It includes a phosphor covering the LED chip. The electric working machine according to claim 16.

21. The optical member has an inner cylindrical portion disposed radially inward of the annular portion. The light transmission portion is disposed so as to connect the front end portion of the outer cylindrical portion and the front end portion of the inner cylindrical portion. The electric working machine according to claim 16.

22. The output portion includes an anvil that is struck in the rotational direction by a hammer. The electric working machine according to claim 1.

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