Electric working machine

Abstract

The present invention relates to an electric working machine. When a display unit is provided in the electric working machine, display data is accurately displayed on the display unit. The electric working machine includes: a motor having a stator and a rotor that rotates relative to the stator; an output unit that is driven by the rotor; a display panel that displays the setting status of the output unit; and a holding member made of metal or synthetic resin that holds the display panel.

Description

Technical Field

[0001] The present invention relates to an electric working machine. Background Art

[0002] In the technical field related to electric working machines, an electric tool having a display unit and an operation unit as disclosed in Patent Document 1 is known.

[0003] Prior Art Documents

[0004] Patent Documents

[0005] Patent Document 1: Japanese Unexamined Patent Application Publication No. 2018-183875 Summary of the Invention

[0006] For example, if the display unit or peripheral components related to the display unit deteriorate, it is possible that the display data cannot be accurately displayed on the display unit.

[0007] An object of the present invention is to accurately display display data on a display unit when the electric working machine is provided with the display unit.

[0008] According to a first invention, there is provided an electric working machine, comprising: a motor having a stator and a rotor that rotates relative to the stator; an output unit that is driven by the rotor; a display panel that displays a setting state of the output unit; and a holding member made of metal or synthetic resin that holds the display panel.

[0009] According to a second invention, there is provided an electric working machine, comprising: a motor having a stator and a rotor that rotates relative to the stator; an output unit that is driven by the rotor; a display panel that displays a setting state of the output unit; a holding member that holds the display panel; a cover member having a display opening and fixing the holding member in such a manner that a display screen of the display panel is disposed in the display opening; a display cover that is disposed to cover the display opening and faces the display screen; and a sealing member that seals a space between the display panel and the display cover.

[0010] According to a third invention, there is provided an electric working machine, comprising: a motor having a stator and a rotor that rotates relative to the stator; an output unit that is driven by the rotor; a display panel that displays a setting state of the output unit; a holding member that holds the display panel, the holding member having: a plate portion that faces a back surface of the display panel; and a frame portion that is disposed around the plate portion and has connection openings provided in at least a part of the plate portion.

[0011] According to the fourth invention, there is provided an electric working machine, characterized by comprising: a motor having a stator and a rotor that rotates relative to the stator; an output unit driven by the rotor; a display panel that displays the setting status of the output unit; a holding member that holds the display panel; a first circuit board that supports the holding member; a second circuit board opposed to the first circuit board; and a spacer disposed between the first circuit board and the second circuit board.

[0012] Advantages of the Invention

[0013] According to the present invention, when a display unit is provided in the electric working machine, the display data is accurately displayed on the display unit. Description of the Drawings

[0014] Figure 1 It is a perspective view showing the screw tightening machine according to the embodiment as viewed from the left front.

[0015] Figure 2 It is a perspective view showing the screw tightening machine according to the embodiment as viewed from the right rear.

[0016] Figure 3 It is a side view showing the screw tightening machine according to the embodiment.

[0017] Figure 4 It is a cross-sectional view showing the screw tightening machine according to the embodiment.

[0018] Figure 5 It is a view obtained by observing the rear cover unit according to the embodiment from the rear.

[0019] Figure 6 It is an exploded perspective view showing the screw tightening machine according to the embodiment as viewed from the right rear.

[0020] Figure 7 It is a perspective view showing the rear cover unit according to the embodiment as viewed from the right rear.

[0021] Figure 8 It is an exploded perspective view showing the rear cover unit according to the embodiment as viewed from the right rear.

[0022] Figure 9 It is a perspective view showing the rear cover unit according to the embodiment as viewed from the right front.

[0023] Figure 10 It is an exploded perspective view showing the rear cover unit according to the embodiment as viewed from the right front.

[0024] Figure 11This is a view of the operation component according to the embodiment as observed from the rear.

[0025] Figure 12 This is an exploded perspective view of the rear cover unit according to the embodiment as observed from the right rear.

[0026] Figure 13 This is an exploded perspective view of the rear cover unit according to the embodiment as observed from the right front.

[0027] Figure 14 This is a view of the diffusing optical component according to the embodiment as observed from the front.

[0028] Figure 15 This is a perspective view of the diffusing optical component according to the embodiment as observed from below.

[0029] Figure 16 This is a perspective view of the diffusing optical component according to the embodiment as observed from the right rear.

[0030] Figure 17 This is a view showing the relationship between the diffusing optical component and the light-emitting element according to the embodiment.

[0031] Figure 18 This is a perspective view of the cover component according to the embodiment as observed from below.

[0032] Figure 19 This is a perspective view of the cover component according to the embodiment as observed from the right rear.

[0033] Figure 20 This is an exploded perspective view of the display panel and the holding component according to the embodiment as observed from the right rear.

[0034] Figure 21 This is an exploded perspective view of the display panel and the holding component according to the embodiment as observed from the right front.

[0035] Figure 22 This is a side view showing the connection structure between the holding component and the interface controller according to the embodiment.

[0036] Figure 23 This is an exploded perspective view of the connection structure between the holding component and the interface controller according to the embodiment as observed from the right rear.

[0037] Figure 24 This is an exploded perspective view of the connection structure between the holding component and the interface controller according to the embodiment as observed from the right front.

[0038] Figure 25 This is a view showing the relationship between the state of the screw tightening machine and the light-emitting state of the notification light-emitting unit according to the embodiment.

[0039] Figure 26 It is a diagram showing the screen switching diagram of the display unit related to the embodiment.

[0040] Symbol Explanation

[0041] 1... Screw tightening machine, 2... Housing, 2L... Left housing, 2R... Right housing, 2S... Screw, 3... Gearbox, 4... Battery assembly section, 5... Motor, 6... Bearing housing, 7... Planetary gear mechanism, 8... Output section, 9... Torque sensor, 10... Fan, 11... Trigger switch, 11A... Trigger component, 11B... Switch body, 12... Forward and reverse switching lever, 13... Sound generating section, 14... Light emitting section, 15... Main controller, 15A... Substrate, 15B... Controller housing, 16... Battery pack, 21... Motor receiving section, 22... Grip section, 23... Controller receiving section, 24A... Air inlet, 24B... Air outlet, 25... Groove, 30... Cover component, 30A... First partition space, 30B... Second partition space, 30C... Third partition space, 30D... Fourth partition space, 31... Notification opening, 32... Display opening, 33... Operation opening, 34... Communication opening, 35... Diffusion optical component, 35A... Passing section, 35B... Connecting section, 36... Display cover, 37... Sealing component, 38... Operating component, 39... Display panel, 40... Holding component, 41... Interface controller, 42... Spacer, 43... First screw, 44... Second screw, 45... First circuit board, 46... Second circuit board, 47... Light emitting element, 48... Switch element, 48A... Switch element (first switch element), 48B... Switch element (second switch element), 48C... Switch element (third switch element), 48D... Switch element (fourth switch element), 49... Optical component, 50... Light emitting element, 51... Stator, 51A... Stator core, 51B... Front insulator, 51C... Rear insulator, 51D... Coil, 51E... Sensor substrate, 52... Rotor, 52A... Rotor core, 52B... Permanent magnet, 53... Rotor shaft, 53A... Front end portion, 54... Bearing, 55... Bearing, 57... Bearing holding section, 70... Internal gear, 71C... Planet gear carrier, 71P... Planet gear, 71S... Pinion gear, 72C... Planet gear carrier, 72P... Planet gear, 72S... Sun gear, 73... Washer, 74... Elastic component, 75... Elastic component, 81... Spindle, 81A... Insertion hole, 82... Chuck, 82A... Ball, 83... Bearing, 84... Bearing, 90... Hollow portion, 91... Front plate portion, 91G... Gear, 92... Rear plate portion, 93... Strain gauge, 96... Through hole, 100... Rear cover unit, 100A... Notification light emitting section, 100B... Display section, 100C... Operation section, 100D... Communication light emitting section, 301... Screw hole, 302... Screw hole, 303... Positioning portion, 304... Positioning portion, 305... Partition wall, 306... Partition wall, 307... Partition wall, 308... Groove, 309... Positioning convex portion, 310... Positioning convex portion, 320... Peripheral wall, 330... Convex portion, 351B... Upper connecting portion, 352B... Left connecting portion, 353B... Right connecting portion, 354B... Lower connecting portion, 351... Incident surface, 352... Emitting surface353…Front surface, 354…Rear surface, 355…Recess, 356…Groove, 381…Plate portion, 382…Button portion, 382A…Button portion (first button portion), 382B…Button portion (second button portion), 382C…Button portion (third button portion), 382D…Button portion (fourth button portion), 383…Operation convex portion, 383A…Operation convex portion (first operation convex portion), 383B…Operation convex portion (second operation convex portion), 383C…Operation convex portion (third operation convex portion), 383D…Operation convex portion (fourth operation convex portion), 384…Positioning portion, 385…Linkage inhibition portion, 386…Slit, 386A…Slit (first linkage inhibition portion), 386B…Slit (second linkage inhibition portion), 386C…Slit (third linkage inhibition portion), 386D…Slit (fourth linkage inhibition portion), 387…Positioning opening, 390…Connecting member, 391…Display screen, 401…Frame portion, 401A…Recess, 402…Plate portion, 403…Support plate portion, 403L…Left support plate portion, 403R…Right support plate portion, 404…Hook portion, 404L…Left hook portion, 404R…Right hook portion, 405…Positioning portion, 406…Positioning portion, 407…Connecting opening, 408…Positioning opening, 409…Positioning opening, 410…Hook opening, 421…Positioning convex portion, 422…Ring portion, 423…Screw boss portion, 424…Screw opening, 451…Substrate opening, 452…Screw opening, 453…Positioning portion, 454…Screw recess, 462…Screw opening, 500…Cover, 501…Third circuit board, 502…Connector, 700…Lead wire, 800…Line filter, 900…Connector, 1000…Wireless communication device, 1001…Rib, 3081…Upper groove, 3082…Support surface, 3083…Support surface, 3084…Lower groove, 4011…First part, 4012…Second part, 4013…First space, 4014…Second space, AX…Rotation axis, CP…Center point, OX…Optical axis.、 Detailed implementation manners

[0042] Hereinafter, with reference to the accompanying drawings, embodiments of the present invention will be described. The present invention is not limited to the embodiments. The constituent elements of the embodiments described below can be appropriately combined. In addition, sometimes some constituent elements are not adopted.

[0043] In the embodiments, terms such as "left", "right", "front", "rear", "upper" and "lower" are used to describe the positional relationships of the respective parts. These terms represent relative positions or directions based on the center of the screw tightening machine 1.

[0044] The screw tightening machine 1 is an electric working machine powered by an electric motor. The screw tightening machine 1 is a power tool as a type of electric working machine. The direction parallel to the rotation axis AX of the electric motor is appropriately referred to as the axial direction. The direction around the periphery of the rotation axis AX is appropriately referred to as the circumferential direction or the rotation direction. The radial direction of the rotation axis AX is appropriately referred to as the radial direction.

[0045] The rotation axis AX extends along the front-rear direction. The axial direction and the front-rear direction coincide. One side of the axial direction is the front, and the other side of the axial direction is the rear. In the radial direction, the position close to the rotation axis AX or the direction approaching the rotation axis AX is appropriately referred to as the inner radial side, and the position far from the rotation axis AX or the direction leaving the rotation axis AX is appropriately referred to as the outer radial side.

[0046] The left-right direction (second direction), the front-rear direction (first direction), and the up-down direction (third direction) are orthogonal to each other.

[0047] [Screw tightening machine]

[0048] Figure 1 is a perspective view showing the screw tightening machine 1 according to the embodiment as viewed from the front left. Figure 2 is a perspective view showing the screw tightening machine 1 according to the embodiment as viewed from the rear right. Figure 3 is a side view showing the screw tightening machine 1 according to the embodiment. Figure 4 is a cross-sectional view showing the screw tightening machine 1 according to the embodiment.

[0049] The screw tightening machine 1 is an industrial electric screwdriver used in a product assembly factory. In the product assembly process, a screw tightening operation using the screw tightening machine 1 is performed. As an assembly factory, an automobile assembly factory can be exemplified. As a product, an automobile can be exemplified.

[0050] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the screw tightening machine 1 includes: a housing 2, a gearbox 3, a battery assembly part 4, a motor 5, a bearing box 6, a planetary gear mechanism 7, an output part 8, a torque sensor 9, a fan 10, a trigger switch 11, a forward-reverse switching lever 12, a sound generating part 13, a light emitting part 14, a main controller 15, and a rear cover unit 100.

[0051] The housing 2 is made of synthetic resin. The housing 2 includes a left housing 2L and a right housing 2R. The left housing 2L and the right housing 2R are fixed by screws 2S. The housing 2 is formed by fixing the left housing 2L and the right housing 2R.

[0052] The housing 2 has: a motor housing part 21, a grip part 22, and a controller housing part 23.

[0053] The motor housing portion 21 houses the motor 5. The motor housing portion 21 has a cylindrical portion extending in the front-rear direction. The motor housing portion 21 is arranged to be above the grip portion 22.

[0054] The grip portion 22 is held by the hand of the operator. The grip portion 22 is arranged to be below the motor housing portion 21. The grip portion 22 extends downward from the motor housing portion 21. The trigger switch 11 is disposed on the grip portion 22.

[0055] The controller housing portion 23 houses the main controller 15. The controller housing portion 23 is arranged to be below the grip portion 22. The controller housing portion 23 is connected to the lower end portion of the grip portion 22. In the front-rear direction and the left-right direction, the outer dimensions of the controller housing portion 23 are larger than the outer dimensions of the grip portion 22 respectively.

[0056] The gear box 3 houses a part of the bearing box 6, the torque sensor 9, the planetary gear mechanism 7, and the output portion 8. The gear box 3 is arranged to be in front of at least a part of the motor 5. The gear box 3 is cylindrical. The gear box 3 is made of metal. In the embodiment, the gear box 3 is made of aluminum. The gear box 3 is arranged to cover the opening at the front portion of the motor housing portion 21. The gear box 3 is fixed to the motor housing portion 21. The rear portion of the gear box 3 is disposed inside the motor housing portion 21. At least a part of the motor housing portion 21 is disposed around the gear box 3. The front portion of the gear box 3 is arranged to be in front of the motor housing portion 21.

[0057] The battery assembly portion 4 is provided at the lower part of the controller housing portion 23. A battery pack 16 can be connected to the battery assembly portion 4. The battery pack 16 is assembled to the battery assembly portion 4. The battery pack 16 can be loaded and unloaded relative to the battery assembly portion 4. The battery pack 16 includes a secondary battery. In the embodiment, the battery pack 16 includes a rechargeable lithium-ion battery. By being assembled to the battery assembly portion 4, the battery pack 16 can supply power to the screw tightening machine 1. The motor 5 is driven based on the power supplied from the battery pack 16. The main controller 15 and the rear cover unit 100 operate based on the power supplied from the battery pack 16 respectively.

[0058] The motor 5 is the power source of the screw tightening machine 1. The motor 5 is an electric motor. The motor 5 is an inner rotor type brushless motor. The motor 5 is housed in the motor housing portion 21.

[0059] The motor 5 has a stator 51 and a rotor 52. The stator 51 is disposed around the rotor 52. The rotor 52 rotates relative to the stator 51. The rotor 52 rotates about the rotation axis AX. The gear box 3 is arranged to be in front of the stator 51.

[0060] The stator 51 has: a stator core 51A, a front insulator 51B, a rear insulator 51C, coils 51D, and a sensor substrate 51E.

[0061] The stator core 51A is cylindrical. The stator core 51A includes a plurality of stacked steel plates. The front insulator 51B is fixed to the front portion of the stator core 51A. The rear insulator 51C is fixed to the rear portion of the stator core 51A. A plurality of coils 51D are provided. The plurality of coils 51D are wound around the teeth of the stator core 51A by means of the front insulator 51B and the rear insulator 51C. The sensor substrate 51E has a plurality of detection elements for detecting the rotation of the rotor 52. The sensor substrate 51E is supported by the rear insulator 51C. The fuse terminals are connected to the plurality of coils 51D.

[0062] The rotor 52 has: a rotor core 52A, a permanent magnet 52B, and a rotor shaft 53.

[0063] The rotor core 52A is disposed inside the stator core 51A and the coils 51D. The rotor core 52A is cylindrical. The rotor core 52A is disposed around the rotor shaft 53. The rotor 52 rotates relative to the stator 51. The rotor core 52A includes a plurality of stacked steel plates. A plurality of permanent magnets 52B are provided. The permanent magnets 52B are held by the rotor core 52A. The rotor core 52A has: a through hole extending in the front-rear direction. A plurality of through holes are formed in the circumferential direction. The permanent magnets 52B are disposed in each of the plurality of through holes of the rotor core 52A.

[0064] The detection elements of the sensor substrate 51E detect the magnetic fields of the plurality of permanent magnets 52B, thereby detecting the rotation of the rotor 52. The main controller 15 supplies a drive current to the coils 51D based on the detection signals of the detection elements.

[0065] The rotor shaft 53 extends in the front-rear direction. The rotor shaft 53 rotates about the rotation axis AX. The rotation axis AX of the rotor shaft 53 coincides with the rotation axis of the output unit 8.

[0066] At least a part of the rotor 52 is supported by the bearing 54. At least a part of the rotor 52 is supported by the bearing 55. In the front-rear direction, the bearing 54 is disposed between the front end portion of the stator 51 and the rear end portion of the torque sensor 9. The bearing 54 supports the front portion of the rotor shaft 53 so as to be rotatable. The bearing 54 supports a part of the rotor shaft 53 that is more forward than the stator 51. In the front-rear direction, the bearing 55 is disposed: more rearward than the rear end portion of the stator 51. The bearing 55 supports the rear portion of the rotor shaft 53 so as to be rotatable. The bearing 55 supports a part of the rotor shaft 53 that is more rearward than the stator 51.

[0067] The bearing housing 6 supports the bearing 54. The bearing housing 6 is disposed around the bearing 54. The bearing housing 6 is housed in the gearbox 3. The bearing housing 6 is fixed to the gearbox 3.

[0068] The bearing 55 is held by the bearing holder 57 provided in the motor housing portion 21.

[0069] The front end portion 53A of the rotor shaft 53 is arranged to be more forward than the bearing 54. The front end portion 53A of the rotor shaft 53 is disposed inside the gearbox 3.

[0070] A pinion 71S is assembled to the front end portion 53A of the rotor shaft 53. The rotor shaft 53 is connected to the planetary gear mechanism 7 via the pinion 71S.

[0071] The planetary gear mechanism 7 is housed in the gearbox 3. The planetary gear mechanism 7 is arranged to be more forward than the torque sensor 9. The planetary gear mechanism 7 connects the rotor shaft 53 and the output portion 8 together. The planetary gear mechanism 7 reduces the rotation speed of the rotor shaft 53 and causes the output portion 8 to rotate at a rotation speed lower than that of the rotor shaft 53. The planetary gear mechanism 7 functions as a power transmission mechanism that transmits the rotational force generated by the motor 5 to the output portion 8.

[0072] The planetary gear mechanism 7 includes: planetary gears 71P, a planetary gear carrier 71C, a sun gear 72S, planetary gears 72P, a planetary gear carrier 72C, and an internal gear 70. The planetary gears 71P, the planetary gear carrier 71C, the sun gear 72S, the planetary gears 72P, the planetary gear carrier 72C, and the internal gear 70 are respectively housed in the gearbox 3.

[0073] A plurality of planetary gears 71P are provided. The plurality of planetary gears 71P are disposed around the pinion 71S. In the embodiment, three planetary gears 71P are disposed around the pinion 71S. The plurality of planetary gears 71P respectively mesh with the pinion 71S. The plurality of planetary gears 71P respectively mesh with the internal gear 70.

[0074] The planetary gear carrier 71C supports the plurality of planetary gears 71P so as to be rotatable.

[0075] The sun gear 72S is disposed in front of the planetary gear carrier 71C. The diameter of the sun gear 72S is smaller than the diameter of the planetary gear carrier 71C. The planetary gear carrier 71C and the sun gear 72S are integrated. The planetary gear carrier 71C and the sun gear 72S rotate together.

[0076] A plurality of planetary gears 72P are provided. The plurality of planetary gears 72P are arranged around the sun gear 72S. In the embodiment, 4 planetary gears 72P are arranged around the sun gear 72S. The plurality of planetary gears 72P are respectively meshed with the sun gear 72S. In the radial direction, the planetary gears 72P are arranged between the sun gear 72S and the internal gear 70.

[0077] The planetary gear carrier 72C supports the plurality of planetary gears 72P so as to be rotatable. The planetary gear carrier 72C is connected to the output part 8. The planetary gear carrier 72C can rotate about the rotation axis AX.

[0078] The internal gear 70 is substantially cylindrical. The internal gear 70 is arranged around the plurality of planetary gears 72P. The internal gear 70 is respectively meshed with the plurality of planetary gears 72P. The inner peripheral surface of the gear box 3 and the outer peripheral surface of the internal gear 70 face each other. In the embodiment, the internal gear 70 can rotate relative to the gear box 3. The internal gear 70 is connected to the torque sensor 9.

[0079] A washer 73 is arranged inside the internal gear 70 and behind the planetary gear 71P. The washer 73 is arranged to surround the pinion gear 71S.

[0080] An elastic member 74 is arranged inside the gear box 3. The elastic member 74 is annular. As the elastic member 74, a rubber O-ring can be exemplified. The elastic member 74 is arranged in a groove provided on the inner peripheral surface of the gear box 3. The rear end surface of the internal gear 70 is in contact with the elastic member 74.

[0081] In the radial direction, an elastic member 75 is arranged between the gear box 3 and the internal gear 70. The elastic member 75 is annular. As the elastic member 75, a rubber O-ring can be exemplified. The elastic member 75 is arranged in a groove provided on the outer peripheral surface of the internal gear 70. The inner peripheral surface of the gear box 3 is in contact with the elastic member 75. In the embodiment, 2 elastic members 75 are arranged in the front-rear direction.

[0082] The pinion gear 71S is connected to the planetary gear 72P via the planetary gear 71P, the planetary gear carrier 71C, and the sun gear 72S. The planetary gear 72P and the planetary gear carrier 72C are respectively rotated by the rotor 52. The planetary gear 71P is connected to the internal gear 70 via the planetary gear carrier 71C, the sun gear 72S, and the planetary gear 72P.

[0083] When the rotor shaft 53 rotates by the drive of the motor 5, the pinion gear 71S rotates, and the planetary gear 71P revolves around the pinion gear 71S. Due to the revolution of the planetary gear 71P, the planetary gear carrier 71C and the sun gear 72S rotate at a rotational speed lower than that of the rotor shaft 53. When the sun gear 72S rotates, the planetary gear 72P revolves around the sun gear 72S. Due to the revolution of the planetary gear 72P, the planetary gear carrier 72C rotates at a rotational speed lower than that of the planetary gear carrier 71C. In this way, if the motor 5 is driven, the planetary gear carrier 72C rotates at a rotational speed lower than that of the rotor shaft 53.

[0084] The output unit 8 is driven by the rotor 52. The output unit 8 rotates based on the rotational force transmitted from the rotor 52 via the planetary gear mechanism 7. The output unit 8 rotates about the rotation axis AX. The output unit 8 is arranged to be more forward than the stator 51. At least a part of the output unit 8 is arranged to be more forward than the planetary gear mechanism 7. A drill bit (front end tool) is attached to the output unit 8. The output unit 8 rotates in a state where the drill bit is attached.

[0085] The output unit 8 includes: a main shaft 81, and a chuck 82.

[0086] The main shaft 81 rotates about the rotation axis AX based on the rotational force transmitted from the rotor 52. The main shaft 81 is supported by bearings 83 and 84 so as to be rotatable. The main shaft 81 is connected to the planetary gear carrier 72C. Due to the rotation of the planetary gear carrier 72C, the main shaft 81 rotates about the rotation axis AX. The main shaft 81 has an insertion hole 81A into which the drill bit is inserted. The insertion hole 81A is formed to extend rearward from the front end portion of the main shaft 81. The cross-section of the insertion hole 81A orthogonal to the rotation axis AX is hexagonal. The cross-section of the drill bit is also hexagonal. By inserting the drill bit with a hexagonal cross-section into the insertion hole 81A with a hexagonal cross-section, the drill bit is fixed to the main shaft 81 in the circumferential direction. The chuck 82 is arranged around the front portion of the main shaft 81. The chuck 82 prevents the drill bit from falling out of the insertion hole 81A. A recess is provided on the side surface of the drill bit. The chuck 82 has balls 82A arranged in the recess of the drill bit. In a state where the drill bit is inserted into the insertion hole 81A, the balls 82A of the chuck 82 are arranged in the recess of the drill bit, thereby preventing the drill bit from falling out of the insertion hole 81A. By rotating the main shaft 81, the drill bit inserted into the insertion hole 81A rotates.

[0087] The torque sensor 9 is a detection unit that detects whether there is an abnormality in the operation performed by the output unit 8. The torque sensor 9 is connected to the output unit 8. In the embodiment, the operation performed by the output unit 8 includes a screw tightening operation. In the embodiment, the torque sensor 9 detects the torque applied to the output unit 8 during the screw tightening operation. The detection signal output from the torque sensor 9 represents the torque applied to the output unit 8. The screw tightening operation is carried out with a drill bit assembled in the output unit 8. The torque detected by the torque sensor 9 includes the screw fastening torque applied to the output unit 8 during the screw tightening operation.

[0088] The torque sensor 9 is housed in the gearbox 3. In the front-rear direction, the torque sensor 9 is disposed between the stator 51 and the output unit 8. In the embodiment, the torque sensor 9 is disposed between the fan 10 and the planetary gear mechanism 7.

[0089] The torque sensor 9 is cylindrical. The torque sensor 9 is disposed around the rotor shaft 53. The front end portion 53A of the rotor shaft 53 is configured to be more forward than the front end portion of the torque sensor 9. The front end portion of the pinion 71S is configured to be more forward than the front end portion of the torque sensor 9. The fan 10 and the motor 5 are configured to be more rearward than the rear end portion of the torque sensor 9.

[0090] The torque sensor 9 has a hollow portion 90, a front plate portion 91, a rear plate portion 92, and a strain gauge 93.

[0091] The hollow portion 90 is cylindrical. In the front-rear direction, the hollow portion 90 is disposed between the front plate portion 91 and the rear plate portion 92. The central axis of the hollow portion 90 coincides with the rotation axis AX. The hollow portion 90 is disposed around the rotor shaft 53.

[0092] The front plate portion 91 is fixed to the front end portion of the hollow portion 90. The front plate portion 91 and the hollow portion 90 are integral. The front plate portion 91 is substantially annular. The central axis of the front plate portion 91 coincides with the rotation axis AX. The front plate portion 91 is disposed around the rotor shaft 53. At least a part of the pinion 71S assembled on the rotor shaft 53 is configured to be more forward than the front end portion of the front plate portion 91. The outer diameter of the front plate portion 91 is larger than the outer diameter of the hollow portion 90. A gear 91G is provided on the outer peripheral surface of the front plate portion 91.

[0093] The front plate portion 91 is engaged with the internal gear 70. At least a part of the internal gear 70 is disposed around the front plate portion 91. The front plate portion 91 and the internal gear 70 are engaged by the gear 91G of the front plate portion 91 and the plurality of teeth of the internal gear 70, so that the front plate portion 91 and the internal gear 70 are engaged. The front plate portion 91 and the internal gear 70 are fixed in the rotation direction. The torque sensor 9 is connected to the internal gear 70 by means of the front plate portion 91. As described above, the planetary gear carrier 72C is connected to the output unit 8. The torque sensor 9 is connected to the output unit 8 by means of the planetary gear mechanism 7.

[0094] The rear plate portion 92 is arranged to be more rearward than the front plate portion 91. The rear plate portion 92 is fixed to the rear end portion of the hollow portion 90. The rear plate portion 92 and the hollow portion 90 are integrally formed. The rear plate portion 92 is substantially annular. The central axis of the rear plate portion 92 coincides with the rotation axis AX. The rear plate portion 92 is arranged around the rotor shaft 53. The outer diameter of the rear plate portion 92 is larger than the outer diameter of the hollow portion 90. The outer diameter of the rear plate portion 92 is larger than the outer diameter of the front plate portion 91.

[0095] The rear plate portion 92 is supported by the gearbox 3. At least a part of the gearbox 3 is arranged around the rear plate portion 92. The rear plate portion 92 is fixed to at least a part of the gearbox 3. The gearbox 3 is fixed to the housing 2. The rear plate portion 92 is fixed to the housing 2 via the gearbox 3.

[0096] The torque sensor 9 has a through-hole 96 that penetrates the front surface of the front plate portion 91 and the rear surface of the rear plate portion 92. At least a part of the through-hole 96 is formed inside the hollow portion 90. At least a part of the rotor shaft 53 is arranged inside the through-hole 96.

[0097] The strain gauges 93 are fixed to the hollow portion 90. The strain gauges 93 output a detection signal (voltage) indicating the torque applied to the output portion 8. In the embodiment, the strain gauges 93 are fixed to the outer surface of the hollow portion 90. A plurality of strain gauges 93 are provided. In the embodiment, 4 strain gauges 93 are arranged in the circumferential direction. The 4 strain gauges 93 are arranged at equal intervals in the circumferential direction.

[0098] The torque applied to the output portion 8 during the screw tightening operation is transmitted to the internal gear 70 via the planet carrier 72C and the planet gears 72P. The front plate portion 91 of the torque sensor 9 is connected to the internal gear 70, and the rear plate portion 92 of the torque sensor 9 is fixed to at least a part of the gearbox 3. Therefore, if torque is applied to the internal gear 70, the hollow portion 90 twists along the rotation direction. When the hollow portion 90 twists along the rotation direction, the 4 strain gauges 93 arranged on the surface of the hollow portion 90 are deformed. Due to the deformation of the strain gauges 93, a detection signal indicating the torque applied to the hollow portion 90 is output from the strain gauges 93. In this way, the torque applied to the output portion 8 is transmitted to the torque sensor 9 via the planetary gear mechanism 7, and therefore, the torque sensor 9 can detect the torque applied to the output portion 8.

[0099] In the embodiment, the strain gauges 93 detect the torque applied to the hollow portion 90, thereby indirectly detecting the torque applied to the output portion 8. When the torque applied to the output portion 8 is large, the detection signal output from the strain gauges 93 increases; when the torque applied to the output portion 8 is small, the detection signal (voltage) output from the strain gauges 93 decreases.

[0100] The fan 10 generates an air flow for cooling the motor 5. In the front-rear direction, the fan 10 is disposed between the stator 51 and the bearing housing 6. The fan 10 is fixed to the rotor shaft 53. The fan 10 rotates by the rotation of the rotor shaft 53. An air inlet 24A and an air outlet 24B are provided in the motor housing portion 21. The air inlet 24A is formed to communicate the internal space and the external space of the motor housing portion 21. The air outlet 24B is also formed to communicate the internal space and the external space of the motor housing portion 21. The air inlet 24A is provided to be more rearward than the air outlet 24B. By the rotation of the fan 10, the air in the external space of the housing 2 flows into the internal space of the housing 2 through the air inlet 24A. The air flowing into the internal space of the housing 2 circulates in the internal space of the housing 2, thereby cooling the motor 5. The air circulating in the internal space of the housing 2 flows out to the external space of the housing 2 through the air outlet 24B.

[0101] The trigger switch 11 is operated to start the motor 5. The trigger switch 11 is disposed in the grip portion 22. The trigger switch 11 includes a trigger member 11A and a switch body 11B. The switch body 11B is housed in the grip portion 22. The trigger member 11A protrudes forward from the upper part of the front portion of the grip portion 22. The trigger member 11A is operated by an operator. By operating the trigger member 11A, the motor 5 is switched between driving and stopping.

[0102] The forward / reverse switching lever 12 is operated to switch the rotation direction of the rotor 52. The forward / reverse switching lever 12 is provided on the upper part of the grip portion 22. The forward / reverse switching lever 12 is operated by an operator. By operating the forward / reverse switching lever 12, the rotation direction of the rotor 52 is switched between the forward rotation direction and the reverse rotation direction. By switching the rotation direction of the rotor 52, the rotation direction of the output portion 8 is switched.

[0103] The sound generating unit 13 generates a sound based on the detection signal of the torque sensor 9. The sound generating unit 13 includes a buzzer element or a vibration element. The sound generating unit 13 is housed in the motor housing portion 21. In the embodiment, at least a part of the sound generating unit 13 is disposed below the gear box 3.

[0104] The light emitting unit 14 illuminates the output portion 8 or the front of the output portion 8. The light emitting unit 14 is disposed in the front portion of the motor housing portion 21. The light emitting unit 14 emits illumination light forward. The light emitting unit 14 includes, for example, a light emitting diode (LED: Light Emitting Diode).

[0105] The main controller 15 includes a computer system. The main controller 15 outputs a control signal for controlling the motor 5. The main controller 15 is housed in the controller housing portion 23. The main controller 15 includes a substrate 15A on which a plurality of electronic components are mounted. At least a part of the main controller 15 is housed in the controller housing 15B. Examples of the electronic components mounted on the substrate 15A include a processor such as a CPU (Central Processing Unit), a non-volatile memory such as a ROM (Read Only Memory) or a storage, a volatile memory such as a RAM (Random Access Memory), transistors, capacitors, and resistors.

[0106] [Rear cover unit]

[0107] Figure 5 FIG. is a view of the rear cover unit 100 according to the embodiment as viewed from the rear. Figure 6 FIG. is an exploded perspective view of the screw tightening machine 1 according to the embodiment as viewed from the right rear.

[0108] The rear cover unit 100 has a user interface function for performing data exchange and the like between an operator and the screw tightening machine 1. The rear cover unit 100 includes a cover member 30, a notification light emitting portion 100A, a display portion 100B, an operation portion 100C, and a communication light emitting portion 100D. The rear cover unit 100 is configured to cover an opening provided at the rear of the motor housing portion 21.

[0109] The cover member 30 is fixed to the motor housing portion 21 by being clamped between the left side housing 2L and the right side housing 2R. The cover member 30 is configured to cover an opening provided at the rear of the motor housing portion 21. The cover member 30 is made of a synthetic resin. Examples of the synthetic resin forming the cover member 30 include nylon resin.

[0110] The cover member 30 has a notification opening 31, a display opening 32, an operation opening 33, and a communication opening 34. The notification opening 31 is provided in the upper portion of the cover member 30. The notification opening 31 is long in the left-right direction. The display opening 32 is provided in the central portion of the cover member 30. The display opening 32 is quadrilateral. The operation opening 33 is provided in the lower portion of the cover member 30. Four operation openings 33 are provided. The operation opening 33 is pentagonal. The communication opening 34 is provided more to the right than the display opening 32 and the operation opening 33. The communication opening 34 is circular.

[0111] The notification light-emitting unit 100A uses light to notify at least the operating status of the output unit 8. The notification light-emitting unit 100A notifies the operator of the operating status of the output unit 8 by changing the light-emitting state. At least a part of the notification light-emitting unit 100A is disposed in the notification opening 31. It should be noted that the function of the notification light-emitting unit 100A is not limited to the notification of the operating status of the output unit 8.

[0112] The display unit 100B displays at least the setting status of the output unit 8. The display unit 100B uses display data to notify the operator of the setting status of the output unit 8. The display unit 100B notifies the setting status of the output unit 8 by changing the displayed display data. At least a part of the display unit 100B is disposed in the display opening 32. It should be noted that the function of the display unit 100B is not limited to the notification of the setting status of the output unit 8.

[0113] The operation unit 100C is operated by the operator to control at least the display unit 100B. The operation unit 100C is operated to cause the display data to be displayed on the display unit 100B or to change the display data displayed on the display unit 100B. In the embodiment, at least a part of the operation unit 100C is disposed in the operation opening 33. It should be noted that the function of the operation unit 100C is not limited to the operation for controlling the display unit 100B.

[0114] The communication light-emitting unit 100D uses light to notify the communication status of the rear cover unit 100. As Figure 4 shown, in the embodiment, the rear cover unit 100 has a wireless communication device 1000. The wireless communication device 1000 can perform short-range wireless communication in a communication mode that does not require a wireless license. The wireless communication device 1000 can also perform wireless communication in a communication mode in accordance with, for example, the IEEE802.15.1 standard standardized by the Institute of Electrical and Electronics Engineers (IEEE). The communication light-emitting unit 100D notifies that the wireless communication device 1000 is starting up by emitting light. At least a part of the communication light-emitting unit 100D is disposed in the communication opening 34. As a communication mode of the wireless communication device 1000, Wi-Fi (registered trademark) can be exemplified.

[0115] Figure 7 is a perspective view showing the rear cover unit 100 according to the embodiment as viewed from the right rear. Figure 8 is an exploded perspective view showing the rear cover unit 100 according to the embodiment as viewed from the right rear. Figure 9 is a perspective view showing the rear cover unit 100 according to the embodiment as viewed from the right front. Figure 10It is an exploded perspective view showing the rear cover unit 100 involved in the embodiment as viewed from the right front.

[0116] As Figure 7 , Figure 8 , Figure 9 and Figure 10 shown, the rear cover unit 100 includes: a cover member 30, a diffusive optical member 35, a display cover 36, a sealing member 37, an operation member 38, a display panel 39, a holding member 40, an optical member 49, an interface controller 41, a spacer 42, a first screw 43, and a second screw 44.

[0117] The interface controller 41 includes: a first circuit board 45 and a second circuit board 46. The first circuit board 45 has: a light-emitting element 47, a switching element 48, and a light-emitting element 50. Two light-emitting elements 47 are provided. Four switching elements 48 are provided. One light-emitting element 50 is provided.

[0118] The rear cover unit 100 is fixed to the motor housing portion 21 by being clamped between the left housing 2L and the right housing 2R. As Figure 9 shown, the cover member 30 has: convex portions 330 protruding from the peripheral portion of the cover member 30. Four convex portions 330 are provided. Two convex portions 330 protrude leftward from the left portion of the cover member 30. The two convex portions 330 are arranged along the vertical direction at the left portion of the cover member 30. Two convex portions 330 protrude rightward from the right portion of the cover member 30. The two convex portions 330 are arranged along the vertical direction at the right portion of the cover member 30. As Figure 6As shown, a groove 25 is provided on the inner surface of the motor housing portion 21. The convex portion 330 is inserted into the groove 25. There are two grooves 25 provided on the left housing 2L. There are also two grooves 25 provided on the right housing 2R. The convex portion 330 provided on the left portion of the cover member 30 is inserted into the groove 25 provided on the left housing 2L. The convex portion 330 provided on the right portion of the cover member 30 is inserted into the groove 25 provided on the right housing 2R. When the cover member 30 is fixed to the motor housing portion 21, with the convex portion 330 on the left portion of the cover member 30 inserted into the groove 25 of the left housing 2L and the convex portion 330 on the right portion of the cover member 30 inserted into the groove 25 of the right housing 2R, the left housing 2L and the right housing 2R are fixed using screws 2S. Accordingly, the cover member 30 is clamped by the left housing 2L and the right housing 2R and fixed to the motor housing portion 21. By inserting the convex portion 330 into the groove 25, the cover member 30 and the motor housing portion 21 are positioned. By inserting the convex portion 330 into the groove 25, the situation where the cover member 30 falls off from the motor housing portion 21 is suppressed. In addition, the situation where the cover member 30 and the motor housing portion 21 rotate relative to each other is suppressed. The cover member 30 can be detached from and attached to the motor housing portion 21. By releasing the fixation applied to the left housing 2L and the right housing 2R by the screws 2S, the cover member 30 is removed from the motor housing portion 21.

[0119] The diffusion optical member 35 diffuses the light from the light-emitting element 47. The diffusion optical member 35 is long in the left-right direction. The diffusion optical member 35 has an incident surface 351 and an emission surface 352. The light-emitting element 47 emits light. The light-emitting element 47 is arranged to face the diffusion optical member 35. The light-emitting element 47 is arranged to be more forward than the diffusion optical member 35. The light from the light-emitting element 47 is incident on the incident surface 351. The diffusion optical member 35 diffuses the light incident on the incident surface 351 from the light-emitting element 47 and emits it from the emission surface 352. The emission surface 352 emits the diffused light rearward. The notification light-emitting portion 100A includes the emission surface 352 of the diffusion optical member 35.

[0120] The diffusion optical member 35 is fixed to the cover member 30. At least a part of the diffusion optical member 35 is arranged in the notification opening 31. The diffusion optical member 35 is made of synthetic resin. As the synthetic resin forming the diffusion optical member 35, polycarbonate resin can be exemplified. It should be noted that a light diffusion material may be dispersed in the synthetic resin forming the diffusion optical member 35.

[0121] The display cover 36 is arranged to cover the display opening 32. The display cover 36 is a transparent sheet-like member.

[0122] The display cover 36 is fixed to the cover member 30. The display cover 36 is made of synthetic resin. As the synthetic resin forming the display cover 36, polycarbonate resin can be exemplified.

[0123] The optical component 49 allows the light from the light-emitting element 50 to pass through. The light-emitting element 50 emits light. The light-emitting element 50 is arranged to face the optical component 49. The light-emitting element 50 is arranged to be more forward than the optical component 49. The light from the light-emitting element 50 is incident on the optical component 49. The optical component 49 emits the light incident from the light-emitting element 50 backward. The communication light-emitting part 100D includes the light-emitting surface of the optical component 49.

[0124] The optical component 49 is fixed to the cover member 30. At least a part of the optical component 49 is arranged in the communication opening 34. The optical component 49 is made of synthetic resin. As the synthetic resin forming the optical component 49, polycarbonate resin can be exemplified.

[0125] The diffusion optical component 35, the display cover 36, and the optical component 49 are respectively fixed to the cover member 30 by injection molding. With the diffusion optical component 35, the display cover 36, and the optical component 49 respectively arranged inside the injection molding die, the synthetic resin for forming the cover member 30 is injected into the inside of the die. Accordingly, the cover member 30 is formed which respectively fixes the diffusion optical component 35, the display cover 36, and the optical component 49.

[0126] The sealing member 37 seals the space between the display panel 39 and the display cover 36. The sealing member 37 is a sheet-like member capable of elastic deformation. The sealing member 37 is in a rectangular ring shape. The sealing member 37 is arranged between the display panel 39 and the display cover 36. The sealing member 37 is formed of a material having cushioning properties. As the material forming the sealing member 37, foamed polyurethane rubber can be exemplified. The sealing member 37 contacts at least a part of the display panel 39. The sealing member 37 contacts at least a part of the display cover 36. The sealing member 37 also functions as a cushioning member for mitigating the impact acting on the display panel 39. The display panel 39 has a display screen 391 facing backward. By the contact between the display panel 39 and the sealing member 37, the space between the display screen 391 of the display panel 39 and the front surface of the display cover 36 becomes a closed space.

[0127] The operation member 38 is operated to control the display panel 39. The operation member 38 is supported by the cover member 30. The operation member 38 can be elastically deformed. In the embodiment, the operation member 38 is made of rubber. At least a part of the operation member 38 is arranged in the operation opening 33.

[0128] The operation member 38 has a plate portion 381, a button portion 382, and an operation convex portion 383.

[0129] The plate portion 381 is arranged to face the front surface of the lid member 30. The button portion 382 protrudes rearward from the rear surface of the plate portion 381. The operation convex portion 383 protrudes forward from the front surface of the plate portion 381.

[0130] The button portion 382 is inserted into the operation opening 33. There are 4 button portions 382. One button portion 382 is inserted into each operation opening 33. The operation portion 100C includes the button portion 382.

[0131] The operation convex portion 383 faces the switch element 48. There are 4 operation convex portions 383. The operation convex portions 383 face the switch element 48 one by one.

[0132] The display panel 39 displays the setting status of the output unit 8. The display panel 39 displays the display data indicating the setting status of the output unit 8.

[0133] The display panel 39 includes a flat panel display. In the embodiment, the display panel 39 is an organic EL panel including an organic electroluminescent display. It should be noted that the display panel 39 may also be a liquid crystal panel including a liquid crystal display. The outer shape of the display panel 39 is a rectangular parallelepiped. The display screen 391 of the display panel 39 faces rearward. The back surface of the display panel 39 faces forward.

[0134] At least a part of the display screen 391 is arranged to face the display opening 32. The display screen 391 faces the display lid 36. The display screen 391 is protected by the display lid 36. The sealing member 37 is arranged to contact the peripheral portion of the display screen 391. The display portion 100B includes the display screen 391 of the display panel 39.

[0135] The holding member 40 holds the display panel 39. The holding member 40 is fixed to the lid member 30 in such a manner that the display screen 391 of the display panel 39 is arranged in the display opening 32. The holding member 40 is formed of a material with high hardness and high strength. In addition, the holding member 40 is formed of a material with impact resistance.

[0136] The holding member 40 is made of metal. Examples of the metal forming the holding member 40 include aluminum, stainless steel, iron, and copper.

[0137] It should be noted that the holding member 40 may also be made of synthetic resin. Examples of the synthetic resin forming the holding member 40 include nylon resin or polycarbonate resin.

[0138] The holding member 40 has: a frame portion 401, a plate portion 402, a support plate portion 403, and a hook portion 404. The frame portion 401, the plate portion 402, the support plate portion 403, and the hook portion 404 are integrally formed. It should be noted that the frame portion 401 and the hook portion 404 may also be separate. The hook portion 404 may be formed of a synthetic resin different from the synthetic resin forming the frame portion 401.

[0139] At least a part of the frame portion 401 is disposed around the plate portion 402. At least a part of the frame portion 401 is disposed around the side surface of the display panel 39.

[0140] The plate portion 402 faces the back surface of the display panel 39.

[0141] The support plate portion 403 protrudes from the side portion of the frame portion 401. The support plate portion 403 includes: a left support plate portion 403L protruding leftward from the left portion of the frame portion 401, and a right support plate portion 403R protruding rightward from the right portion of the frame portion 401.

[0142] The hook portion 404 is provided at the front end portion of the support plate portion 403. The hook portion 404 can be elastically deformed. The hook portion 404 is hooked on the peripheral portion of the first circuit board 45. The hook portion 404 includes: a left hook portion 404L provided at the left end portion of the left support plate portion 403L, and a right hook portion 404R provided at the right end portion of the right support plate portion 403R. The left hook portion 404L is hooked on the left end portion of the first circuit board 45. The right hook portion 404R is hooked on the right end portion of the first circuit board 45.

[0143] The interface controller 41 includes a computer system. The interface controller 41 controls the rear cover unit 100. The interface controller 41 includes: a first circuit board 45, and a second circuit board 46.

[0144] The first circuit board 45 includes: a printed wiring board, 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 CPU (Central Processing Unit), a non-volatile memory such as a ROM (Read Only Memory) or a storage, a volatile memory such as a RAM (Random Access Memory), a transistor, a capacitor, and a resistor.

[0145] The light-emitting element 47 emits light. The light-emitting element 47 includes a light-emitting diode (LED: Light Emitting Diode). The light-emitting element 47 is supported by the first circuit board 45. The light-emitting element 47 is mounted on the printed wiring board of the first circuit board 45. The light-emitting element 47 is disposed on the rear surface of the first circuit board 45. The light-emitting element 47 emits light rearward. The light-emitting element 47 is disposed in the upper part of the first circuit board 45. The light-emitting element 47 emits light toward the diffusion optical member 35. There are 2 light-emitting elements 47. The 2 light-emitting elements 47 are arranged along the left-right direction.

[0146] The switch element 48 outputs an operation signal when operated. The switch element 48 is a two-position switch. The switch element 48 includes an auto reset button. The switch element 48 outputs an operation signal when pressed. The switch element 48 is supported by the first circuit board 45. The switch element 48 is mounted on the printed wiring board of the first circuit board 45. The switch element 48 is disposed on the rear surface of the first circuit board 45. The switch element 48 is disposed in the lower part of the first circuit board 45. The switch element 48 is operated by means of the operation member 38. There are 4 switch elements 48.

[0147] The light-emitting element 50 emits light. The light-emitting element 50 includes a light-emitting diode (LED: Light Emitting Diode). The light-emitting element 50 is supported by the first circuit board 45. The light-emitting element 50 is mounted on the printed wiring board of the first circuit board 45. The light-emitting element 50 is disposed on the rear surface of the first circuit board 45. The light-emitting element 50 emits light rearward. The light-emitting element 50 is disposed in the right part of the first circuit board 45. The light-emitting element 50 emits light toward the optical member 49. There is 1 light-emitting element 50.

[0148] The second circuit board 46 faces the first circuit board 45. The second circuit board 46 is arranged to be more forward than the first circuit board 45. Similarly to the first circuit board 45, the second circuit board 46 also includes a printed wiring board and a plurality of electronic components mounted on the printed wiring board. The first circuit board 45 and the second circuit board 46 are connected together. The wireless communication device 1000 is supported by the second circuit board 46.

[0149] As Figure 4 and Figure 6 shown, a third circuit board 501 is disposed at a position facing the second circuit board 46. The third circuit board 501 is housed in the motor housing portion 21. The third circuit board 501 is arranged to be more forward than the second circuit board 46. The third circuit board 501 includes a Universal Serial Bus (USB) circuit. A cover 500 is disposed on the upper part of the third circuit board 501.

[0150] A lead 700 is connected to the third circuit board 501. A connector 502 is fixed to the third circuit board 501. One end of the lead 700 is connected to the third circuit board 501 by means of the connector 502. A connector 900 is connected to the other end of the lead 700. The connector 900 includes a USB connector. The connector 900 is connected to the second circuit board 46. The connector 900 can be detached from and attached to the second circuit board 46.

[0151] A line filter 800 and a rib 1001 are housed in the motor housing portion 21. The line filter 800 and the rib 1001 are arranged to be more forward than the second circuit board 46. The line filter 800 is cylindrical. The line filter 800 is arranged to be lower than the third circuit board 501. The rib 1001 extends from the inner surface of the left housing 2L. The rib 1001 is arranged to be more rearward than the line filter 800. At least a part of the lead 700 is supported by the line filter 800. At least a part of the lead 700 is wound around the line filter 800. In addition, at least a part of the lead 700 is arranged between the rib 1001 and the line filter 800.

[0152] When changing the setting of the output unit 8, a personal computer is connected to the third circuit board 501, and a change instruction for changing the setting of the output unit 8 is sent from the personal computer to the third circuit board 501. The personal computer and the third circuit board 501 communicate based on the USB standard. The change instruction sent to the third circuit board 501 is sent to the second circuit board 46 of the interface controller 41 via the lead 700.

[0153] The third circuit board 501 and the second circuit board 46 are separate, and the third circuit board 501 and the second circuit board 46 are connected by means of the lead 700 and the connector 900. Therefore, even if the third circuit board 501 or the connector 900 fails or is damaged, it is only necessary to replace or repair the third circuit board 501 or the connector 900. In addition, the wireless communication device 1000 is supported by the second circuit board 46. The rib 1001 and the line filter 800 are arranged in front of the wireless communication device 1000. Accordingly, the distance between the wireless communication device 1000 and the third circuit board 501 becomes longer.

[0154] It should be noted that when changing the setting of the output unit 8, a change instruction can also be sent from the personal computer to the interface controller 41 via the wireless communication device 1000.

[0155] The spacer 42 is disposed between the first circuit board 45 and the second circuit board 46. The second circuit board 46 is disposed opposite to the first circuit board 45 with the spacer 42 interposed therebetween. In the vertical direction, the size of the first circuit board 45 is larger than that of the second circuit board 46. The lower end portion of the first circuit board 45 is disposed to be lower than the lower end portion of the second circuit board 46. The first circuit board 45 and the second circuit board 46 are connected by means of the spacer 42.

[0156] The spacer 42 has positioning convex portions 421. There are two positioning convex portions 421 provided. A board opening 451 is provided in a part of the first circuit board 45. There are two board openings 451 provided. The positioning convex portions 421 provided on the spacer 42 are disposed in the board openings 451. The positioning convex portions 421 protrude to a position further rearward than the rear surface of the first circuit board 45.

[0157] The first screws 43 fix the cover member 30, the first circuit board 45, the spacer 42, and the second circuit board 46. There are four first screws 43 provided.

[0158] Screw holes 301 are provided in the cover member 30. There are four screw holes 301 provided in the cover member 30. The front end portions of the first screws 43 are inserted into the screw holes 301. Screw openings 452 are provided in the first circuit board 45. There are four screw openings 452 provided in the first circuit board 45. Screw openings 462 are provided in the second circuit board 46. There are four screw openings 462 provided in the second circuit board 46. At least a part of the first screws 43 is disposed in the screw openings 452. At least a part of the first screws 43 is disposed in the screw openings 462.

[0159] The second screws 44 fix the cover member 30 and the first circuit board 45. The second screws 44 fix the cover member 30 and the first circuit board 45 without passing through the spacer 42 and the second circuit board 46. As described above, the lower end portion of the first circuit board 45 is disposed to be lower than the lower end portion of the second circuit board 46. The second screws 44 fix the lower part of the first circuit board 45 and the cover member 30. The second screws 44 are disposed to be lower than the first screws 43.

[0160] Screw holes 302 are provided in the cover member 30. The front end portions of the second screws 44 are inserted into the screw holes 302. The screw holes 302 are disposed in at least a part of the periphery of the operation member 38.

[0161] There are two second screws 44 provided. There are two screw holes 302 provided in the cover member 30. One screw hole 302 is provided on the left side of the operation member 38. The other screw hole 302 is provided on the right side of the operation member 38.

[0162] Screw recesses 454 are provided on the side of the first circuit board 45. There are two screw recesses 454 provided on the first circuit board 45. One screw recess 454 is provided to be recessed from the left part of the peripheral edge of the first circuit board 45 toward the right. The other screw recess 454 is provided to be recessed from the right part of the peripheral edge of the first circuit board 45 toward the left. At least a part of the second screw 44 is disposed in the screw recess 454.

[0163] The first circuit board 45 supports the holding member 40. The first circuit board 45 is arranged to be more rearward than the holding member 40. The first circuit board 45 faces the plate part 402 of the holding member 40. As described above, the holding member 40 has hook parts 404. The left hook part 404L is hooked on the left end of the first circuit board 45. The right hook part 404R is hooked on the right end of the first circuit board 45. By hooking the hook parts 404 on the peripheral edge of the first circuit board 45, the first circuit board 45 and the holding member 40 are connected together.

[0164] The first circuit board 45 has a positioning part 453 for positioning the holding member 40. The positioning part 453 includes a positioning convex part 421 of the spacer 42 protruding rearward from the rear surface of the first circuit board 45. The positioning convex part 421 protrudes rearward from the rear surface of the first circuit board 45 by being disposed in the board opening 451. The holding member 40 has a positioning part 405 positioned in the positioning part 453. The positioning part 405 includes a positioning opening 408 provided in at least a part of the holding member 40. In the embodiment, the positioning opening 408 is provided in the support plate part 403. By inserting the positioning convex part 421 of the positioning part 453 into the positioning opening 408 of the positioning part 405, the first circuit board 45 and the holding member 40 are positioned.

[0165] The cover member 30 has a positioning part 303 for positioning the operating member 38. The positioning part 303 includes a positioning convex part 309 protruding forward from the front surface of the cover member 30. The operating member 38 has a positioning part 384 positioned in the positioning part 303. The positioning part 384 includes a positioning opening 387 provided in at least a part of the operating member 38. In the embodiment, the positioning opening 387 is provided in the plate part 381. By inserting the positioning convex part 309 of the positioning part 303 into the positioning opening 387 of the positioning part 384, the cover member 30 and the operating member 38 are positioned. In a state where the positioning convex part 309 of the positioning part 303 is inserted into the positioning opening 387 of the positioning part 384, the button part 382 is inserted into the operation opening 33.

[0166] The cover member 30 has a positioning portion 304 for positioning the holding member 40. The positioning portion 304 includes a positioning convex portion 310 that protrudes forward from the front surface of the cover member 30. The holding member 40 has a positioning portion 406 positioned in the positioning portion 304. The positioning portion 406 includes a positioning opening 409 provided in at least a part of the holding member 40. In the embodiment, the positioning opening 409 is provided in the support plate portion 403. The cover member 30 and the holding member 40 are positioned by inserting the positioning convex portion 310 of the positioning portion 304 into the positioning opening 409 of the positioning portion 406. In a state where the positioning convex portion 310 of the positioning portion 304 is inserted into the positioning opening 409 of the positioning portion 406, the display panel 39 held by the holding member 40 is arranged to face the display cover 36. In a state where the positioning convex portion 310 of the positioning portion 304 is inserted into the positioning opening 409 of the positioning portion 406, the display panel 39 held by the holding member 40 is arranged to face the display opening 32. The peripheral portion of the display screen 391 of the display panel 39 is in contact with the sealing member 37.

[0167] In a state where the cover member 30 and the operation member 38 are positioned and the cover member 30 and the holding member 40 are positioned, the first screw 43 is inserted into the screw hole 301 through the screw opening 452 of the first circuit board 45 and the screw opening 462 of the second circuit board 46. The cover member 30, the first circuit board 45, and the second circuit board 46 are fixed by the engagement of the thread of the first screw 43 and the thread groove of the screw hole 301.

[0168] By fixing the cover member 30, the first circuit board 45, and the second circuit board 46, the light-emitting element 47 and the diffusion optical member 35 are opposed to each other, and the switching element 48 and the operation convex portion 383 are opposed to each other. The peripheral portion of the display screen 391 of the display panel 39 is pressed against the sealing member 37, and the display screen 391 of the display panel 39 is opposed to the front surface of the display cover 36.

[0169] [Operation member]

[0170] Figure 11 is a view obtained by observing the operation member 38 according to the embodiment from the rear. As Figure 8 , Figure 10 and Figure 11 shown, the operation member 38 has a plate portion 381; a button portion 382 that protrudes rearward from the rear surface of the plate portion 381; and an operation convex portion 383 that protrudes forward from the front surface of the plate portion 381. The plate portion 381, the button portion 382, and the operation convex portion 383 are integrated.

[0171] A plurality of button portions 382 are provided on the plate portion 381 so as to surround a predetermined center point CP. The plurality of button portions 382 are provided at intervals around the center point CP. In the embodiment, four button portions 382 are provided. The button portion 382 includes: a button portion 382A (first button portion) disposed above the center point CP; a button portion 382B (second button portion) disposed to the left of the center point CP; a button portion 382C (third button portion) disposed below the center point CP; and a button portion 382D (fourth button portion) disposed to the right of the center point CP. The button portion 382A, the button portion 382B, the button portion 382C, and the button portion 382D are arranged on the plate portion 381 so as to surround the predetermined center point CP.

[0172] In a plane parallel to the surface of the plate portion 381, the outer shape of the button portion 382 is a pentagon. The shapes of the plurality of button portions 382 are substantially the same. The sizes of the plurality of button portions 382 are substantially the same. The button portion 382 is arranged such that the corner portion with the smallest interior angle among the plurality of corner portions of the button portion 382 faces the center point CP.

[0173] A plurality of operation convex portions 383 are provided on the plate portion 381 so as to surround a predetermined center point CP. The plurality of operation convex portions 383 are provided at intervals around the center point CP. In the embodiment, four operation convex portions 383 are provided. The operation convex portion 383 includes: an operation convex portion 383A (first operation convex portion) disposed above the center point CP; an operation convex portion 383B (second operation convex portion) disposed to the left of the center point CP; an operation convex portion 383C (third operation convex portion) disposed below the center point CP; and an operation convex portion 383D (fourth operation convex portion) disposed to the right of the center point CP. The operation convex portion 383A, the operation convex portion 383B, the operation convex portion 383C, and the operation convex portion 383D are arranged on the plate portion 381 so as to surround the predetermined center point CP.

[0174] In a plane parallel to the surface of the plate portion 381, the outer shape of the operation convex portion 383 is a circle. The shapes of the plurality of operation convex portions 383 are substantially the same. The sizes of the plurality of operation convex portions 383 are substantially the same.

[0175] In a plane parallel to the surface of the plate portion 381, the positions of at least a part of the button portion 382A and the operation convex portion 383A coincide. That is, at least a part of the button portion 382A and the operation convex portion 383A overlap in the left - right direction and the up - down direction, respectively. Similarly, at least a part of the button portion 382B and the operation convex portion 383B overlap in the left - right direction and the up - down direction, respectively. At least a part of the button portion 382C and the operation convex portion 383C overlap in the left - right direction and the up - down direction, respectively. At least a part of the button portion 382D and the operation convex portion 383D overlap in the left - right direction and the up - down direction, respectively.

[0176] Four switching elements 48 are provided. The switching elements 48 include: a switching element 48A (first switching element) opposed to the front end portion of the operation convex portion 383A, a switching element 48B (second switching element) opposed to the front end portion of the operation convex portion 383B, a switching element 48C (third switching element) opposed to the front end portion of the operation convex portion 383C, and a switching element 48D (fourth switching element) opposed to the front end portion of the operation convex portion 383D. The operation convex portion 383A protrudes from the plate portion 381 so as to be opposed to the switching element 48A. The operation convex portion 383B protrudes from the plate portion 381 so as to be opposed to the switching element 48B. The operation convex portion 383C protrudes from the plate portion 381 so as to be opposed to the switching element 48C. The operation convex portion 383D protrudes from the plate portion 381 so as to be opposed to the switching element 48D.

[0177] The operator operates the operation member 38 in such a manner that the button portion 382 is pressed forward. The button portion 382 is displaced forward by being pressed forward by the operator.

[0178] When the button portion 382A is displaced forward, the operation convex portion 383A moves forward, and the switching element 48A is pressed by the operation convex portion 383A. That is, the switching element 48A is operated by the displacement of the button portion 382A. Even if the button portion 382A is displaced forward, the switching elements 48B, 48C, and 48D are not pressed.

[0179] When the button portion 382B is displaced forward, the operation convex portion 383B moves forward, and the switching element 48B is pressed by the operation convex portion 383B. That is, the switching element 48B is operated by the displacement of the button portion 382B. Even if the button portion 382B is displaced forward, the switching elements 48C, 48D, and 48A are not pressed.

[0180] When the button portion 382C is displaced forward, the operation convex portion 383C moves forward, and the switch element 48C is pressed by the operation convex portion 383C. That is, the switch element 48C is operated by the displacement of the button portion 382C. Even when the button portion 382C is displaced forward, the switch elements 48D, 48A, and 48B are not pressed.

[0181] When the button portion 382D is displaced forward, the operation convex portion 383D moves forward, and the switch element 48D is pressed by the operation convex portion 383D. That is, the switch element 48D is operated by the displacement of the button portion 382D. Even when the button portion 382D is displaced forward, the switch elements 48A, 48B, and 48C are not pressed.

[0182] In the embodiment, a linkage suppression portion 385 that suppresses the linkage between the first button portion 382 and the second button portion 382 is provided on at least a part of the plate portion 381. The linkage suppression portion 385 can suppress the displacement of the second button portion 382 different from the first button portion 382 due to the displacement of the first button portion 382. The linkage suppression portion 385 is provided on the plate portion 381 between the first button portion 382 and the second button portion 382. That is, the linkage suppression portion 385 is provided at the boundary of the adjacent button portions 382. By the linkage suppression portion 385, even if, for example, the button portion 382A is pressed backward, the displacement of the button portions 382B, 382C, and 382D backward can be suppressed. By the linkage suppression portion 385, the four button portions 382 can be operated independently.

[0183] In the embodiment, the linkage suppression portion 385 includes a slit 386 provided in the plate portion 381. In the embodiment, the slit 386 is formed in a straight shape. The slit 386 is provided inside the peripheral portion of the plate portion 381. That is, the slit 386 is provided so as not to reach the peripheral portion of the plate portion 381.

[0184] In the embodiment, four slits 386 are provided. The slits 386 include a slit 386A (first linkage suppression portion), a slit 386B (second linkage suppression portion), a slit 386C (third linkage suppression portion), and a slit 386D (fourth linkage suppression portion).

[0185] The slits 386 are provided so as to extend along the radial direction with respect to the center point CP. The slits 386A, 386B, 386C, and 386D extend along the radial direction with respect to the center point CP. The slits 386A, 386B, 386C, and 386D are arranged to surround the center point CP.

[0186] In the circumferential direction with the center point CP as a reference, the slit 386A is provided between the button part 382A and the button part 382B. The slit 386B is provided between the button part 382B and the button part 382C. The slit 386C is provided between the button part 382C and the button part 382D. The slit 386D is provided between the button part 382D and the button part 382A.

[0187] The slit 386A, the slit 386B, the slit 386C, and the slit 386D are respectively arranged such that they do not reach the peripheral part of the plate part 381. That is, the peripheral part of the plate part 381 is not divided by the slit 386.

[0188] In addition, the slit 386A, the slit 386B, the slit 386C, and the slit 386D are respectively arranged such that they do not reach the center point CP of the plate part 381.

[0189] That is, the slit 386A, the slit 386B, the slit 386C, and the slit 386D are separated from each other. The slit 386A, the slit 386B, the slit 386C, and the slit 386D are arranged not to be connected to each other. The slit 386A, the slit 386B, the slit 386C, and the slit 386D are arranged to be independent of each other.

[0190] The length of the slit 386A is different from the length of the slit 386B. The length of the slit 386C is different from the length of the slit 386D. The length of the slit 386A is substantially equal to the length of the slit 386C. The length of the slit 386B is substantially equal to the length of the slit 386D. In the embodiment, the length of the slit 386A and the length of the slit 386C are longer than the length of the slit 386B and the length of the slit 386D. The widths of the slit 386A, the slit 386B, the slit 386C, and the slit 386D are equal.

[0191] The length of the slit 386 refers to the dimension in the radial direction with respect to the center point CP. The width of the slit 386 refers to the dimension in the circumferential direction with the center point CP as a reference.

[0192] The slit 386A and the slit 386C are substantially parallel. The slit 386B and the slit 386D are substantially parallel. The angle formed by the slit 386A and the slit 386B is substantially 90 [°]. The angle formed by the slit 386B and the slit 386C is substantially 90 [°]. The angle formed by the slit 386C and the slit 386D is substantially 90 [°]. The angle formed by the slit 386D and the slit 386A is substantially 90 [°].

[0193] There are two positioning openings 387 provided in the plate portion 381. One positioning opening 387 is provided at the first corner portion of the plate portion 381. The other positioning opening 387 is provided at the second corner portion of the plate portion 381. The first corner portion and the second corner portion are opposite to each other. That is, when the diagonal line passing through the first corner portion, the center point CP, and the second corner portion is defined, the two positioning openings 387 are respectively arranged on the diagonal line. The positioning protrusions 309 of the positioning portion 303 are respectively inserted into the two positioning openings 387. The positioning portion 303 positions the cover member 30 and the operation member 38 at two opposite corner portions of the plate portion 381.

[0194] The button portion 382 is inserted into the operation opening 33. As described above, there are four operation openings 33 provided. That is, the first operation opening 33, the second operation opening 33, the third operation opening 33, and the fourth operation opening 33 are provided in the cover member 30. In the state where the cover member 30 and the operation member 38 are positioned, one button portion 382 is inserted into each operation opening 33. The button portion 382A is arranged in the first operation opening 33. The button portion 382B is arranged in the second operation opening 33. The button portion 382C is arranged in the third operation opening 33. The button portion 382D is arranged in the fourth operation opening 33. The four button portions 382 respectively protrude to a position behind the rear surface of the cover member 30 in the state of being arranged in the operation openings 33. By the button portion 382 protruding to a position behind the rear surface of the cover member 30, the operator can press the button portion 382.

[0195] It should be noted that the linkage suppression portion 385 may not be the slit 386. The linkage suppression portion 385 may be, for example, a thin wall portion provided in at least a part of the plate portion 381, or may be a bellows portion provided in at least a part of the plate portion 381.

[0196] [Diffusion optical component]

[0197] Figure 12 It is an exploded perspective view showing the rear cover unit 100 according to the embodiment as viewed from the right rear. Figure 13 It is an exploded perspective view showing the rear cover unit 100 according to the embodiment as viewed from the right front. Figure 14 It is a view obtained by observing the diffusion optical component 35 according to the embodiment from the front. Figure 15 It is a perspective view showing the diffusion optical component 35 according to the embodiment as viewed from below. Figure 16 It is a perspective view showing the diffusion optical component 35 according to the embodiment as viewed from the right rear. Figure 17 It is a view showing the relationship between the diffusion optical component 35 and the light emitting element 47 according to the embodiment.

[0198] The diffusing optical component 35 is a transmissive diffusing optical component. The diffusing optical component 35 is longer in the left-right direction. The diffusing optical component 35 has an incident surface 351 and an exit surface 352. The diffusing optical component 35 has a passing portion 35A through which at least a part of the light incident from the incident surface 351 passes, and a connecting portion 35B disposed at least in part around the passing portion 35A. The passing portion 35A is longer in the left-right direction. The incident surface 351 and the exit surface 352 are provided on the passing portion 35A. The passing portion 35A is disposed in the display opening 32 of the cover member 30. The connecting portion 35B is fixed to the cover member 30.

[0199] The incident surface 351 and the exit surface 352 are disposed at different positions in the front-rear direction. The incident surface 351 is disposed such that it is more forward than the exit surface 352. The diffusing optical component 35 is fixed to the cover member 30 such that at least a part of the incident surface 351 faces forward and at least a part of the exit surface 352 faces rearward.

[0200] The passing portion 35A has a front surface 353, a rear surface 354, and a recess 355 provided on the front surface 353. The front surface 353 faces forward. At least a part of the rear surface 354 faces rearward. The front surface 353 and the rear surface 354 are each longer in the left-right direction.

[0201] The front surface 353 is a flat surface. The front surface 353 is orthogonal to an axis parallel to the optical axis OX of the light-emitting element 47. The optical axis OX of the light-emitting element 47 extends along the front-rear direction. In the embodiment, the optical axis OX of the light-emitting element 47 is parallel to the rotation axis AX of the motor 5.

[0202] The recess 355 is formed to be recessed rearward from the front surface 353. Two recesses 355 are provided. The two recesses 355 are arranged along the left-right direction. The two recesses 355 are arranged with a space therebetween.

[0203] The incident surface 351 of the diffusing optical component 35 includes the inner surface of the recess 355. The exit surface 352 of the diffusing optical component 35 includes the rear surface 354.

[0204] A groove 356 is provided on the incident surface 351, i.e., the inner surface of the recess 355. The groove 356 extends along the up-down direction. A plurality of grooves 356 are provided on the inner surface of the recess 355 and along the left-right direction. The groove 356 provided on the incident surface 351 functions as a diffusing portion for diffusing light. The incident surface 351 provided with the groove 356 functions as a diffusing surface for diffusing light.

[0205] The recess 355 is substantially formed in a semi-cylindrical shape. As Figure 17 shown, the cross-sectional shape of the inner surface of the recess 355 orthogonal to the front surface 353 is substantially arc-shaped.

[0206] In the embodiment, a cross-section orthogonal to the front surface 353 means a cross-section parallel to a specified plane including a first axis parallel to the front-back direction and a second axis parallel to the left-right direction. The cross-sectional shape of the inner surface of the recess 355 parallel to the specified plane is the same at a plurality of positions in the up-down direction. That is, when the recess 355 is regarded as a semi-cylinder, the central axis of the semi-cylinder extends along the up-down direction.

[0207] In addition, when a reference line passing through the center of the recess 355 in the left-right direction and extending along the up-down direction is defined, the shape of the recess 355 is symmetric with respect to the reference line. That is, when the recess 355 is viewed from the front, the shape of the recess 355 is symmetric about the left and right.

[0208] As Figure 17 shown, the light-emitting element 47 is arranged to face the incident surface 351. The incident surface 351 and the light-emitting element 47 are arranged at an interval in the front-back direction. The light-emitting element 47 is supported by the first circuit board 45. The light-emitting element 47 is arranged to be more forward than the front surface 353. The light-emitting element 47 is arranged outside the recess 355 and faces the incident surface 351.

[0209] Two recesses 355 are arranged at an interval in the left-right direction. That is, two incident surfaces 351 are provided. In the embodiment, the incident surface 351 includes a first incident surface 351 and a second incident surface 351 arranged to be more to the right than the first incident surface 351. The first incident surface 351 and the second incident surface 351 are arranged at an interval in the left-right direction.

[0210] Two light-emitting elements 47 are provided. One recess 355 faces one light-emitting element 47. The light-emitting element 47 includes a first light-emitting element 47 that makes light incident on the first incident surface 351 and a second light-emitting element 47 that makes light incident on the second incident surface 351.

[0211] At least a part of the light emitted from the light-emitting element 47 is incident on the incident surface 351. The incident surface 351 diffuses the light from the light-emitting element 47. When the light-emitting element 47 is regarded as a point light source, the incident surface 351 converts the light from the point light source into a surface light source. The incident surface 351 diffuses the light from the light-emitting element 47 at least in the left-right direction.

[0212] The light incident on the incident surface 351 is diffused on the incident surface 351, then passes through the through portion 35A, and is emitted from the emission surface 352. The emission surface 352 emits the light diffused on the incident surface 351.

[0213] The diffusing optical component 35 is disposed above the cover component 30. The light emitting surface 352 is disposed above the cover component 30. The light emitting surface 352 is inclined with respect to the optical axis OX of the light emitting element 47. In the embodiment, at least a part of the light emitting surface 352 is inclined downward toward the rear.

[0214] One end portion and the other end portion of the light emitting surface 352 in the left - right direction are respectively disposed at positions closer to the incident surface 351 than the central portion of the light emitting surface 352 in the front - rear direction. That is, the left end portion and the right end portion of the light emitting surface 352 are respectively disposed more forward than the central portion of the light emitting surface 352. The light emitting surface 352 bends from the central portion toward the left end portion and bends from the central portion toward the right end portion. That is, in the embodiment, the light emitting surface 352 includes a curved surface. At least a part of the light emitting surface 352 bends so as to bulge toward the rear.

[0215] The light emitting surface 352 emits at least a part of the light from the incident surface 351 toward the rear. The light emitting surface 352 also emits at least a part of the light from the incident surface 351 toward the left rear and the right rear respectively. The light emitting surface 352 further emits at least a part of the light from the incident surface 351 toward the rear upper and the rear lower respectively.

[0216] In the embodiment, the left end portion and the right end portion of the light emitting surface 352 are respectively disposed more rearward than the rear end portion of the notification opening 31. That is, the left end portion of the light emitting surface 352 protrudes to a position more rearward than the rear surface of the cover component 30 disposed around the left end portion of the light emitting surface 352. The right end portion of the light emitting surface 352 protrudes to a position more rearward than the rear surface of the cover component 30 disposed around the right end portion of the light emitting surface 352.

[0217] The connecting portion 35B has: an upper connecting portion 351B provided above the passing portion 35A; a left connecting portion 352B provided on the left of the passing portion 35A; a right connecting portion 353B provided on the right of the passing portion 35A; and a lower connecting portion 354B provided below the passing portion 35A.

[0218] The upper connecting portion 351B protrudes upward from the upper part of the passing portion 35A. The upper connecting portion 351B extends along the left - right direction. The left connecting portion 352B protrudes leftward from the left part of the passing portion 35A. The right connecting portion 353B protrudes rightward from the right part of the passing portion 35A. The left end portion of the upper connecting portion 351B is connected to the left connecting portion 352B. The right end portion of the upper connecting portion 351B is connected to the right connecting portion 353B. The upper connecting portion 351B, the left connecting portion 352B, and the right connecting portion 353B are arranged to surround a part of the front surface 353.

[0219] The lower connecting portion 354B protrudes downward from the lower part of the passing portion 35A. The lower connecting portion 354B extends along the left - right direction.

[0220] Figure 18 is a perspective view showing the lid member 30 according to the embodiment as viewed from below. Figure 19 is a perspective view showing the lid member 30 according to the embodiment as viewed from the right rear.

[0221] As Figure 18 shown, on the front surface of the lid member 30, there are provided: a peripheral wall 320, partition walls 305, 306, and 307. The peripheral wall 320 is provided along the peripheral edge portion of the lid member 30. The partition walls 305, 306, and 307 are provided inside the peripheral wall 320.

[0222] The first partition space 30A, the second partition space 30B, the third partition space 30C, and the fourth partition space 30D are defined by the peripheral wall 320, the partition walls 305, 306, and 307. The first partition space 30A is defined by the peripheral wall 320 and the partition wall 305. The second partition space 30B is defined by the peripheral wall 320 and the partition wall 306. The third partition space 30C is defined by the peripheral wall 320, the partition wall 305, and the partition wall 306. The fourth partition space 30D is defined by the peripheral wall 320 and the partition wall 307. The first partition space 30A and the third partition space 30C are partitioned by the partition wall 305. The third partition space 30C and the second partition space 30B are partitioned by the partition wall 306. The second partition space 30B and the third partition space 30C and the fourth partition space 30D are partitioned by the partition wall 307.

[0223] The first partition space 30A is provided in the upper part of the lid member 30. The second partition space 30B is provided in the lower part of the lid member 30. The third partition space 30C is provided between the first partition space 30A and the second partition space 30B in the vertical direction. The fourth partition space 30D is provided to the right of the second partition space 30B.

[0224] The incident surface 351 of the diffusing optical member 35 and the light emitting element 47 are arranged in the first partition space 30A. The operating member 38 is arranged in the second partition space 30B. The display panel 39 and the holding member 40 are arranged in the third partition space 30C. The optical member 49 is arranged in the fourth partition space 30D.

[0225] By arranging the incident surface 351 of the diffusing optical member 35 and the light emitting element 47 in the first partition space 30A, the situation where at least a part of the light emitted from the light emitting element 47 leaks to the external space of the lid member 30 through at least a part of the display opening 32, the operation opening 33, and the communication opening 34 is suppressed.

[0226] In addition, by providing the peripheral wall 320, partition walls 305, 306, and 307, the strength of the lid member 30 is increased.

[0227] A groove 308 is provided on the inner surface of the lid member 30 that defines the first partition space 30A. At least a part of the connecting portion 35B is disposed in the groove 308. The groove 308 includes an upper groove 3081 provided on the top surface of the first partition space 30A and a lower groove 3084 provided on the bottom surface of the first partition space 30A. The upper connecting portion 351B is disposed in the upper groove 3081. The lower connecting portion 354B is disposed in the lower groove 3084. The left connecting portion 352B is supported by a support surface 3082 provided on the left portion of the first partition space 30A. The right connecting portion 353B is supported by a support surface 3083 provided on the right portion of the first partition space 30A.

[0228] [Display Panel and Holding Member]

[0229] Figure 20 FIG. is an exploded perspective view showing the display panel 39 and the holding member 40 according to the embodiment as viewed from the right rear. Figure 21 FIG. is an exploded perspective view showing the display panel 39 and the holding member 40 according to the embodiment as viewed from the right front.

[0230] The holding member 40 includes a frame portion 401, a plate portion 402, a support plate portion 403, and a hook portion 404.

[0231] A connection opening 407 is provided in at least a part of the plate portion 402. The connection opening 407 is provided at the peripheral edge of the plate portion 402. In the embodiment, the connection opening 407 is provided in the upper portion of the plate portion 402.

[0232] The connection opening 407 is rectangular. The display panel 39 and the first circuit board 45 of the interface controller 41 are connected by a connection member 390 such as a flexible substrate or a lead wire. The display panel 39 and the interface controller 41 perform data communication via the connection member 390. At least a part of the connection member 390 is disposed in the connection opening 407. That is, in a state where the display panel 39 is held by the holding member 40, the connection member 390 penetrates through the connection opening 407.

[0233] The frame portion 401 has a recess 401A that is recessed so as to be away from the center of the connection opening 407. In the embodiment, the recess 401A is provided in the upper portion of the frame portion 401. The recess 401A is recessed upward so as to be away from the center of the connection opening 407. At least a part of the connection member 390 is positioned in the recess 401A.

[0234] The frame part 401 has: a first part 4011 protruding rearward from the peripheral part of the rear surface of the plate part 402, and a second part 4012 protruding forward from the peripheral part of the front surface of the plate part 402. That is, the second part 4012 protrudes in the direction opposite to the first part 4011.

[0235] The display panel 39 is disposed in: a first space 4013 defined by the rear surface of the plate part 402 and the inner surface of the first part 4011. In a state where the display panel 39 is disposed in the first space 4013, the rear end part of the first part 4011 is disposed to be: more rearward than the display screen 391. That is, at least a part of the first part 4011 protrudes to a position more rearward than the display screen 391.

[0236] A second space 4014 is defined by the front surface of the plate part 402 and the second part 4012. At least a part of the connection member 390 can be accommodated in the second space 4014.

[0237] [Connection Structure between Holding Member and Interface Controller]

[0238] Figure 22 It is a side view showing the connection structure between the holding member 40 and the interface controller 41 according to the embodiment. Figure 23 It is an exploded perspective view showing the connection structure between the holding member 40 and the interface controller 41 according to the embodiment as viewed from the right rear. Figure 24 It is an exploded perspective view showing the connection structure between the holding member 40 and the interface controller 41 according to the embodiment as viewed from the right front.

[0239] The holding member 40 is connected to the first circuit board 45 through the hook part 404. The hook part 404 can be elastically deformed so that the left hook part 404L and the right hook part 404R are separated. In the embodiment, a hook opening 410 is provided at the rear part of the hook part 404. Through the hook opening 410, the hook part 404 is easily elastically deformed. The left hook part 404L and the right hook part 404R are elastically deformed so that the left hook part 404L is disposed to be: more to the left than the left end part of the first circuit board 45, and the right hook part 404R is disposed to be: more to the right than the right end part of the first circuit board 45. After that, the elastic deformation of the left hook part 404L and the right hook part 404R can be released. By releasing the elastic deformation of the left hook part 404L and the right hook part 404R, the first circuit board 45 is clamped by the left hook part 404L and the right hook part 404R due to the elastic force (restoring force) of the left hook part 404L and the right hook part 404R. In addition, the front end part of the hook part 404 is hooked on at least a part of the front surface of the first circuit board 45. Accordingly, the holding member 40 is connected to the first circuit board 45.

[0240] A spacer 42 is disposed between a first circuit board 45 and a second circuit board 46. The spacer 42 has a ring portion 422, a screw boss portion 423, and a positioning convex portion 421. A screw opening 424 for disposing a first screw 43 is provided in the screw boss portion 423.

[0241] The first screw 43 fixes the cover member 30, the first circuit board 45, the spacer 42, and the second circuit board 46. The first screw 43 is inserted into the screw hole 301 of the cover member 30 in a state where it is respectively disposed in the screw opening 462 of the second circuit board 46, the screw opening 424 of the spacer 42, and the screw opening 452 of the first circuit board 45. Accordingly, the cover member 30, the first circuit board 45, the spacer 42, and the second circuit board 46 are fixed by the first screw 43.

[0242] Electronic components are mounted on the front surface of the first circuit board 45. Electronic components are also mounted on the rear surface of the second circuit board 46. By the spacer 42, the contact between the electronic components mounted on the front surface of the first circuit board 45 and the electronic components mounted on the rear surface of the second circuit board 46 is suppressed.

[0243] The lower portion of the first circuit board 45 is fixed to the cover member 30 by a second screw 44. A switching element 48 is disposed in the lower portion of the first circuit board 45. The lower portion of the first circuit board 45 is pressed rearward by an operator using an operation member 38. The lower portion of the first circuit board 45 and the cover member 30 are fixed by the second screw 44, whereby even if the lower portion of the first circuit board 45 is pressed rearward, the deformation of the first circuit board 45 is suppressed.

[0244] [Interface controller]

[0245] The interface controller 41 includes a first circuit board 45 and a second circuit board 46. The interface controller 41 controls at least a light-emitting element 47 (notification light-emitting unit 100A) and a display panel 39 (display unit 100B).

[0246] In the embodiment, the interface controller 41 controls the light-emitting element 47 at least based on the operation status of the output unit 8. That is, the interface controller 41 controls the light-emitting state of the notification light-emitting unit 100A based on the operation status of the output unit 8.

[0247] In addition, the interface controller 41 controls the display panel 39 at least based on the setting status of the output unit 8. That is, the interface controller 41 controls the display data displayed on the display unit 100B based on the setting status of the output unit 8. In the embodiment, the interface controller 41 controls the display data of the display screen 391 displayed on the display panel 39 based on the operation of the operation member 38 (operation unit 100C).

[0248] [Operation of the screw tightening machine]

[0249] During the screw tightening operation, the main controller 15 starts the motor 5 based on the operation signal of the trigger switch 11, causing the output unit 8 to rotate. During the screw tightening operation, when the screw is screwed into the work object, the torque applied to the output unit 8 increases. The torque applied to the output unit 8 is transmitted to the internal gear 70 via the planet carrier 72C and the planet gear 72P. The torque applied to the internal gear 70 is transmitted to the torque sensor 9 via the front plate portion 91. The torque applied to the output unit 8 is detected by the torque sensor 9.

[0250] The rear plate portion 92 of the torque sensor 9 is fixed to the gear box 3. The hollow portion 90 of the torque sensor 9 is twisted along the rotation direction by the internal gear 70. It should be noted that the front plate portion 91 and the rear plate portion 92 are also subjected to torque, but the diameters of the front plate portion 91 and the rear plate portion 92 are both thicker than the diameter of the hollow portion 90. Therefore, the torsional deformation of the front plate portion 91 and the rear plate portion 92 is smaller than the torsional deformation of the hollow portion 90. If the hollow portion 90 of the torque sensor 9 is twisted along the rotation direction, the four strain gauges 93 arranged on the surface of the hollow portion 90 are deformed. Due to the deformation of the strain gauges 93, a detection signal indicating the torque applied to the hollow portion 90 is sent from the strain gauges 93 to the main controller 15 via a lead wire (not shown).

[0251] The main controller 15 acquires the detection signal of the torque sensor 9. The main controller 15 calculates the torque applied to the output unit 8 based on the detection signal of the torque sensor 9. The target torque is registered in the main controller 15. The main controller 15 controls the motor 5 based on the detection signal of the torque sensor 9 so that the screw is fastened to the work object with the target torque.

[0252] When the main controller 15 determines based on the detection signal of the torque sensor 9 that the torque applied to the output unit 8 reaches the target torque, it controls the motor 5 to stop the rotation of the rotor 52. Accordingly, the main controller 15 can control the motor 5 based on the detection signal of the torque sensor 9 so that the screw is fastened to the work object with the target torque.

[0253] As described above, the rear cover unit 100 has a wireless communication device 1000. The main controller 15 sends the detection signal of the torque sensor 9 to the wireless communication device 1000. The wireless communication device 1000 sends the detection signal of the torque sensor 9 to a management computer arranged outside the screw tightening machine 1. The management computer records the detection signal of the torque sensor 9 during the screw tightening operation.

[0254] [Operation of the notification light-emitting unit]

[0255] Figure 25 It is a diagram showing the relationship between the state of the screw tightening machine 1 according to the embodiment and the light-emitting state of the notification light-emitting unit 100A.

[0256] The interface controller 41 controls the light-emitting state of the notification light-emitting unit 100A based on the state of the screw tightening machine 1. The notification light-emitting unit 100A changes the light-emitting state based on the state of the screw tightening machine 1.

[0257] The light generated by the light-emitting diode, i.e., the light-emitting element 47, is emitted from the notification light-emitting unit 100A. In addition, two light-emitting elements 47 are provided. The change in the light-emitting state of the notification light-emitting unit 100A includes at least one of a change in the light-emitting color, a change in the light-emitting time, and a change in the presence or absence of blinking.

[0258] The state of the screw tightening machine 1 includes at least the operating condition of the output unit 8. The operating condition of the output unit 8 includes: the tightening torque applied to the screw of the output unit 8 during the screw tightening operation. The operating condition of the output unit 8 includes: the determination result indicating whether the screw is fastened to the work object with the target torque.

[0259] As Figure 25 shown, in the case of "tightening OK", that is, when the difference between the screw tightening torque applied to the screw of the output unit 8 and the target torque is lower than a pre-specified torque threshold during the screw tightening operation, the interface controller 41 controls the light-emitting elements 47 so that the two light-emitting elements 47 emit green light for 2 seconds respectively.

[0260] In the case of "tightening NG (torque)", that is, when the difference between the screw tightening torque applied to the screw of the output unit 8 and the target torque exceeds a pre-determined torque threshold during the screw tightening operation, the interface controller 41 controls the light-emitting elements 47 so that the two light-emitting elements 47 emit red light for 2 seconds respectively.

[0261] In the case of "maintenance warning", that is, when it is determined that at least a part of the screw tightening machine 1 needs to be maintained, the interface controller 41 controls the light-emitting elements 47 so that the two light-emitting elements 47 continuously blink with yellow light for a time longer than 2 seconds.

[0262] [Operation of the display unit]

[0263] Figure 26 This is a diagram showing the screen switching diagram of the display unit 100B according to the embodiment.

[0264] The interface controller 41 controls the display data displayed on the display unit 100B based on the state of the screw tightening machine 1. The display unit 100B changes the display data based on the state of the screw tightening machine 1.

[0265] The state of the screw tightening machine 1 at least includes the setting status of the output unit 8. The setting status of the output unit 8 includes: the setting status of the target torque when tightening a screw to a work object during the screw tightening operation.

[0266] The interface controller 41 changes the display data displayed on the display unit 100B based on the operation of the operation unit 100C.

[0267] As Figure 26 shown, a torque display screen S1, a password display screen S2, and a work quantity display screen S3 are displayed on the display unit 100B.

[0268] By pressing the button unit 382D in the state where the torque display screen S1 is displayed, the screen switches from the torque display screen S1 to the password display screen S2. By pressing the button unit 382B in the state where the password display screen S2 is displayed, the screen switches from the password display screen S2 to the torque display screen S1.

[0269] By pressing the button unit 382C in the state where the torque display screen S1 is displayed, the screen switches from the torque display screen S1 to the work quantity display screen S3. By pressing the button unit 382A in the state where the work quantity display screen S3 is displayed, the screen switches from the work quantity display screen S3 to the torque display screen S1.

[0270] In the torque display screen S1, the target torque when tightening a screw to a work object during the screw tightening operation is displayed. It should be noted that when changing the target torque, a change command instructing the change of the target torque is sent from a personal computer outside the screw tightening machine 1 to the interface controller 41.

[0271] In the password display screen S2, the operator can input a password. For example, when changing the settings of the output unit 8, a password is input. In the embodiment, the password is represented by four-digit numbers. In the password display screen S2, when the button unit 382A is pressed, the number increases; when the button unit 382C is pressed, the number decreases. In the password display screen S2, when the button unit 382B is pressed, the number of digits moves to the left; when the button unit 382D is pressed, the number of digits moves to the right. When determining the changed number, the button unit 382 is long-pressed.

[0272] In the operation quantity display screen S3, the total number of screws fastened to the work object (the number of times the screw tightening operation is performed) is displayed. The interface controller 41 can count the number of screws fastened to the work object. When the operator wants to confirm the total number of screws fastened to the work object, the operation quantity display screen S3 is displayed on the display unit 100B.

[0273] [Effect]

[0274] As described above, according to the embodiment, the rear cover unit 100 includes: a display panel 39 and a holding member 40 that holds the display panel 39. The holding member 40 is made of metal or synthetic resin. That is, the holding member 40 is formed of a material with high hardness and high strength. Therefore, deformation of the display panel 39 held by the holding member 40 is suppressed. For example, in the assembly operation of the rear cover unit 100 or the screw tightening operation using the screw tightening machine 1, a force may be applied to the display panel 39. According to the embodiment, since the holding member 40 that holds the display panel 39 is formed of a material with high hardness and high strength, even if a force is applied to the display panel 39, for example, flexure of the display screen 391 is suppressed. In addition, since the holding member 40 is formed of a material with impact resistance, even if an impact acts on the rear cover unit 100, breakage of the display panel 39 is suppressed. In this way, since the holding member 40 that holds the display panel 39 is made of metal or synthetic resin, deterioration of the display panel 39 is suppressed. Therefore, the display data is accurately displayed on the display screen 391.

[0275] The holding member 40 is fixed to the cover member 30. The holding member 40 is fixed to the cover member 30 in such a manner that the display screen 391 of the display panel 39 is disposed at the display opening 32 of the cover member 30. Accordingly, an operator can see the display data displayed on the display screen 391 through the display opening 32. The display cover 36 is disposed so as to cover the display opening 32, whereby the display screen 391 is protected by the display cover 36. Accordingly, deterioration of the display screen 391 is suppressed. A sealing member 37 is provided for sealing the space between the display screen 391 of the display panel 39 and the display cover 36. By means of the sealing member 37, intrusion of foreign matter around the rear cover unit 100 into the space between the display screen 391 and the display cover 36 is suppressed. That is, due to the presence of the sealing member 37, attachment of foreign matter to the display screen 391 or the front surface of the display cover 36 is suppressed. Therefore, the display data is accurately displayed on the display screen 391. The operator can see the display data displayed on the display screen 391. In addition, since attachment of foreign matter to the display screen 391 is suppressed, deterioration of the display panel 39 is suppressed.

[0276] The sealing member 37 is arranged to contact the peripheral portion of the display screen 391. Accordingly, attachment of foreign matter to the display screen 391 is effectively suppressed. In addition, the sealing member 37 functions as a buffer member for alleviating the impact acting on the display panel 39. Therefore, even if an impact acts on the rear cover unit 100, deterioration of the display panel 39 is suppressed.

[0277] The cover member 30 has a positioning portion 304 for positioning the holding member 40. Accordingly, a change in the relative position between the cover member 30 and the holding member 40 is suppressed. By suppressing a change in the relative position between the cover member 30 and the holding member 40, a change in the relative position between the cover member 30 and the display panel 39 is suppressed. By suppressing a change in the relative position between the cover member 30 and the display panel 39, a change in the relative position between the display opening 32 and the display screen 391 is suppressed. Therefore, the display data is accurately displayed on the display screen 391. The operator can see the display data displayed on the display screen 391. In addition, since movement of the display panel 39 is suppressed, deterioration of the display panel 39 is suppressed. In addition, a decrease in workability when the holding member 40 is assembled to the cover member 30 is suppressed.

[0278] The positioning portion 304 includes a positioning convex portion 310 inserted into a positioning opening 409 provided in at least a part of the holding member 40. Accordingly, a change in the relative position between the cover member 30 and the holding member 40 is effectively suppressed. In addition, a decrease in workability when the holding member 40 is assembled to the cover member 30 is suppressed.

[0279] The lid member 30 is configured to cover the opening provided at the rear of the motor housing portion 21. That is, the lid member 30 can function as a rear lid that covers the opening provided at the rear of the motor housing portion 21. The rear lid unit 100 is disposed at the rear of the motor housing portion 21. Since the rear lid unit 100 is disposed at the rear of the motor housing portion 21, an operator can smoothly perform data exchange with the rear lid unit 100.

[0280] The holding member 40 has: a plate portion 402 that faces the back surface of the display panel 39; and a frame portion 401 that is disposed around the plate portion 402. A connection opening 407 is provided in at least a part of the plate portion 402. A connection member such as a flexible substrate or a lead that connects the display panel 39 and the first circuit board 45 can pass through the connection opening 407. The display panel 39 and the first circuit board 45 are smoothly connected by the connection member passing through the connection opening 407. In addition, due to the presence of the connection opening 407, excessive stress on the connection member can be suppressed. Therefore, the situation of deterioration of the connection member is suppressed. So, the display data is accurately displayed on the display screen 391.

[0281] The connection opening 407 is provided at the peripheral portion of the plate portion 402. The frame portion 401 has a recessed portion 401A that is recessed so as to be away from the center of the connection opening 407. At least a part of the connection member is positioned in the recessed portion 401A. Therefore, the situation where the workability when connecting the display panel 39 and the first circuit board 45 with the connection member is reduced is suppressed.

[0282] The frame portion 401 has a first portion 4011 that protrudes rearward from the peripheral portion of the plate portion 402. A first space 4013 is defined by the plate portion 402 and the first portion 4011. Accordingly, the display panel 39 is received in the first space 4013. In the embodiment, the rear end portion of the first portion 4011 protrudes to a position further rearward than the display screen 391. Accordingly, for example, when the holding member 40 is assembled to the lid member 30, the possibility that the first portion 4011 touches the lid member 30 before the display screen 391 increases. Therefore, the situation of deterioration of the display screen 391 is suppressed. That is, the display screen 391 is protected by the first portion 4011, and the situation where the workability when assembling the holding member 40 to the lid member 30 is reduced is suppressed.

[0283] The frame portion 401 has: a second portion 4012 protruding forward from the peripheral portion of the plate portion 402. A second space 4014 is defined by the plate portion 402 and the second portion 4012. Accordingly, at least a part of the connecting member is received in the second space 4014. By receiving at least a part of the connecting member in the second space 4014, the situation where excessive stress acts on the connecting member is suppressed. In addition, the first circuit board 45 is disposed behind the second space 4014. Therefore, the connecting member disposed in the second space 4014 is protected by the first circuit board 45. Therefore, the situation where the connecting member deteriorates is suppressed. Therefore, the display data is accurately displayed on the display screen 391.

[0284] The rear cover unit 100 has: a second circuit board 46 facing the first circuit board 45 with a spacer 42 interposed therebetween. By arranging the first circuit board 45 and the second circuit board 46 in a stacked manner, the enlargement of the rear cover unit 100 is suppressed. In addition, a spacer 42 is disposed between the first circuit board 45 and the second circuit board 46. Due to the presence of the spacer 42, the situation where the electronic components mounted on the first circuit board 45 come into contact with the electronic components mounted on the second circuit board 46 is suppressed. Accordingly, the deterioration of the electronic components mounted on the first circuit board 45 and the electronic components mounted on the second circuit board 46 is suppressed. Therefore, the display data is accurately displayed on the display screen 391 of the display panel 39.

[0285] The first circuit board 45, the spacer 42, and the second circuit board 46 are fixed by a first screw 43. Accordingly, the situation where the relative positions of the first circuit board 45, the spacer 42, and the second circuit board 46 change is suppressed.

[0286] The first circuit board 45 has a positioning portion 453 for positioning the holding member 40. Due to the presence of the positioning portion 453, the situation where the relative positions of the first circuit board 45 and the holding member 40 change is suppressed.

[0287] A substrate opening 451 is provided in the first circuit board 45. The positioning portion 453 includes: a positioning convex portion 421 provided on the spacer 42 and disposed in the substrate opening 451. The positioning convex portion 421 is inserted into: a positioning opening 408 provided in at least a part of the holding member 40. Accordingly, the relative position changes of the spacer 42, the first circuit board 45, and the holding member 40 are effectively suppressed. In addition, even if no positioning convex portion is provided on the first circuit board 45, by making full use of the positioning convex portion 421 provided on the spacer 42, the relative position changes of the spacer 42, the first circuit board 45, and the holding member 40 can also be effectively suppressed. In addition, the situation where the workability when positioning the spacer 42, the first circuit board 45, and the holding member 40 is reduced is suppressed.

[0288] The holding member 40 has a hook portion 404 that is hooked on the peripheral portion of the first circuit board 45. Accordingly, the holding member 40 and the first circuit board 45 are connected together.

[0289] The interface controller 41 controls the display panel 39 based on the setting status of the output unit 8. Accordingly, the operator can confirm the display data displayed on the display panel 39, thereby confirming the setting status of the output unit 8.

[0290] [Other Embodiments]

[0291] In the above-described embodiment, the electric working machine is a screw tightening machine (electric screwdriver), which is a type of electric tool. The electric tool is not limited to an electric screwdriver. Examples of the electric tool include: a drill driver, an angle drill, an impact screwdriver, a grinder, a hammer, a hammer drill, a circular saw, and a reciprocating saw. In addition, the electric working machine may be a gardening tool (Outdoor Power Equipment). Examples of the gardening tool include: a chain saw, a hedge trimmer, a lawn mower, a grass cutter, and a blower.

[0292] In the above-described embodiment, the battery pack 16 assembled in the battery assembly portion is used as the power source of the electric working machine. As the power source of the electric working machine, a commercial power source (AC power source) may also be used.

Claims

1. An electric working machine, characterized in that, Comprising: A motor having a stator and a rotor that rotates relative to the stator; An output unit that is driven by the rotor; A display panel that displays the setting status of the output unit; A holding member made of metal or synthetic resin that holds the display panel; A cover member having a display opening and fixing the holding member such that the display screen of the display panel is disposed in the display opening; and A first circuit board having a light-emitting element and a switching element, The holding member has: A plate portion that faces the back surface of the display panel; A frame portion that is disposed around the plate portion; Support plate portions that respectively protrude from the left and right portions of the frame portion and have positioning portions positioned at first positioning portions provided in the cover member; Hook portions that are provided at the front end portions of the two support plate portions and respectively hook the left end portion and the right end portion of the first circuit board.

2. The electric working machine according to claim 1, wherein Comprising: A display cover that is configured to cover the display opening and face the display screen; and A sealing member that seals the space between the display panel and the display cover.

3. An electric working machine, characterized in that, Comprising: A motor having a stator and a rotor that rotates relative to the stator; An output unit that is driven by the rotor; A display panel that displays the setting status of the output unit; A holding member that holds the display panel; A cover member having a display opening and fixing the holding member such that the display screen of the display panel is disposed in the display opening; A display cover that is configured to cover the display opening and face the display screen; A rectangular ring-shaped sealing member that seals the space between the display panel and the display cover; An operation member that is operated to control the display panel; And A first circuit board that supports the holding member, The cover member has: A first partitioned space defined by a peripheral wall portion and a first partition wall for disposing a diffusing optical member; A second partitioned space defined by the peripheral wall portion and a second partition wall for disposing the operation member; And A third partitioned space defined by the peripheral wall portion, the first partition wall, and the second partition wall for disposing the display panel and the holding member, The sealing member is disposed in the third partitioned space, In the third partitioned space, a plurality of first screw holes for inserting first screws are provided around the sealing member, The cover member and the first circuit board are fixed by the first screws, the peripheral edge portion of the display screen of the display panel is pressed against the sealing member, and the display screen of the display panel faces the front surface of the display cover.

4. The power-operated working machine according to claim 3, wherein The sealing member is configured to contact the peripheral edge portion of the display screen.

5. The electric working machine according to claim 3, wherein: the lid member has a first positioning portion that positions the holding member.

6. The electric working machine according to claim 5, wherein: the first positioning portion includes a first positioning convex portion that is inserted into a first positioning opening provided in at least a part of the holding member.

7. The electric working machine according to claim 3, wherein: the electric working machine includes a motor housing portion that houses the motor, and the lid member is configured to cover an opening provided at the rear of the motor housing portion.

8. The electric working machine according to claim 3, wherein: the holding member has a plate portion that faces the back surface of the display panel, and a frame portion that is disposed around the plate portion, and a connection opening is provided in at least a part of the plate portion.

9. An electric working machine, characterized in that, Comprising: a motor having a stator and a rotor that rotates relative to the stator; an output portion that is driven by the rotor; a display panel that displays the setting status of the output portion; a holding member that holds the display panel; and an interface controller including a first circuit board and a second circuit board; the holding member has a plate portion that faces the back surface of the display panel, and a frame portion that is disposed around the plate portion, a connection opening is provided at the peripheral edge portion of the plate portion, the frame portion has a recess that is recessed so as to be away from the center of the connection opening, the frame portion has a first portion that protrudes rearward from the peripheral edge portion of the back surface of the plate portion and a second portion that protrudes forward from the peripheral edge portion of the front surface of the plate portion, the display panel is connected to the first circuit board of the interface controller by a connection member that is a flexible substrate or a lead wire, the display panel is disposed in a first space defined by the plate portion and the first portion, the connection member is disposed in a second space defined by the plate portion and the second portion, and at least a part of the connection member is positioned in the recess.

10. The electric working machine according to any one of claims 1 to 9, characterized in that, Comprising: a first circuit board that supports the holding member; a second circuit board that faces the first circuit board; and a spacer that is disposed between the first circuit board and the second circuit board.

11. An electric working machine, characterized in that, Comprising: a motor having a stator and a rotor that rotates relative to the stator; an output portion that is driven by the rotor; a display panel that displays the setting status of the output portion; a holding member that holds the display panel; a lid member that has a display opening and fixes the holding member such that the display screen of the display panel is disposed in the display opening; a first circuit board that supports the holding member; a second circuit board that faces the first circuit board; and A spacer configured to be disposed between the first circuit board and the second circuit board. On the cover member, a plurality of first screw holes for inserting first screws are provided around the display opening, and a plurality of second screw holes for inserting second screws are provided below the display opening. The first screw is inserted into the first screw hole through the screw opening of the first circuit board and the screw opening of the second circuit board. The second screw is inserted into the second screw hole through the screw opening of the first circuit board without passing through the second circuit board. A screw recess for disposing at least a part of the second screw is provided on a side portion of the first circuit board.

12. The electric working machine according to claim 11, wherein: The electric working machine includes a first screw that fixes the first circuit board, the spacer, and the second circuit board.

13. The electric working machine according to claim 11 or 12, wherein: The first circuit board has a second positioning portion that positions the holding member.

14. The electric working machine according to claim 13, wherein: A board opening is provided in the first circuit board. The second positioning portion includes a second positioning convex portion that is provided on the spacer and disposed in the board opening. The second positioning convex portion is inserted into a second positioning opening provided in at least a part of the holding member.

15. An electric working machine, characterized in that, Comprising: A motor having a stator and a rotor that rotates relative to the stator; An output portion driven by the rotor; A display panel that displays a set state of the output portion; A holding member that holds the display panel; A cover member having a display opening and fixing the holding member such that a display screen of the display panel is disposed in the display opening; A first circuit board having a second positioning portion that positions the holding member and supporting the holding member; and A second circuit board opposed to the first circuit board with a spacer therebetween. The cover member has: A first partitioned space defined by a peripheral wall portion and a first partition wall for disposing a diffusion optical member; A second partitioned space defined by the peripheral wall portion and a second partition wall for disposing an operation member; And A third partitioned space defined by the peripheral wall portion, the first partition wall, and the second partition wall for disposing the display panel and the holding member. In the third partitioned space, a plurality of first screw holes for inserting first screws are provided around a sealing member. In the second partitioned space, a plurality of second screw holes for inserting second screws are provided. The first screw is inserted into the first screw hole through the screw opening of the first circuit board and the screw opening of the second circuit board. The second screw is inserted into the second screw hole through the screw opening of the first circuit board and without passing through the second circuit board.

16. The electric working machine according to claim 15, characterized in that The holding member has a hook portion that is engaged with the peripheral portion of the first circuit board.

17. The electric working machine according to claim 15 or 16, characterized in that The electric working machine is provided with an interface controller that controls the display panel based on the setting state of the output unit.

Images