power tools

Abstract

The present invention aims to improve the visual confirmation of the light-emitting portion used for notification. The screwdriver (1) includes: a motor; an output portion driven by the motor; and a main body shell (2) that accommodates the motor and has a handle portion and a battery mounting portion (50) arranged below the handle portion. In addition, the screwdriver (1) includes: a switch held in the handle portion; and a control circuit substrate that is accommodated in the battery mounting portion (50) and has an LED mounted on the upper surface. In addition, an opening (63a) for visually confirming the light emitted by the LED is formed on the left side of the upper surface of the battery mounting portion (50).

Description

Technical Field

[0001] The present invention relates to electric tools such as screwdrivers. Background Art

[0002] Power tools such as screwdrivers include a motor and an output unit driven by the motor. A known housing housing the motor includes a handle extending downward and a battery mounting portion disposed below the handle. Patent Document 1 discloses a structure in which a terminal block for electrically connecting a battery pack is housed in the battery mounting portion, with a control circuit board disposed above the terminal block. Furthermore, an operating panel (light-emitting portion) is disposed on the upper surface of the battery mounting portion. The operating panel includes a lighting switch, a remaining capacity display switch, and a battery indicator. Pressing the remaining capacity display switch illuminates the battery indicator with a number of scales corresponding to the remaining capacity of the battery pack.

[0003] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-111206 Summary of the Invention

[0004] Because the operation panel is located in the center of the upper surface of the battery compartment in the left-right direction, if the handle is held with one hand, the light emitted by the operation panel is blocked by the hand, making it difficult to visually confirm from behind. This problem is not limited to the remaining battery capacity. It also applies to devices such as screwdrivers that can switch between multiple operating modes and display the selected operating mode on the operation panel, making it difficult to determine which operating mode is currently active.

[0005] Therefore, an object of the present invention is to provide an electric tool having an improved visibility of a light emitting portion for notification.

[0006] In order to achieve the above object, the first invention of the present invention is characterized by comprising:

[0007] motor;

[0008] an output portion driven by the motor;

[0009] a housing for housing the motor and comprising a handle and a battery mounting portion disposed below the handle;

[0010] a switch held on the handle; and

[0011] A control circuit board is housed in the battery mounting portion and has a light emitting component mounted on its upper surface.

[0012] A hole for visually confirming the light emitted by the light emitting member is formed on either the left or right side of the upper surface of the battery mounting portion.

[0013] In order to achieve the above object, the second invention of the present invention is characterized by comprising:

[0014] motor;

[0015] an output portion driven by the motor;

[0016] a housing for housing the motor and comprising a handle and a battery mounting portion disposed below the handle;

[0017] a switch held on the handle; and

[0018] A control circuit board is housed in the battery mounting portion and has a light emitting component mounted on its upper surface.

[0019] A plate-shaped member having a hole for visually confirming the light emitted by the light-emitting member is provided on either the left or right side of the upper surface of the battery mounting portion.

[0020] In order to achieve the above object, the third invention of the present invention is characterized by comprising:

[0021] motor;

[0022] an output portion driven by the motor;

[0023] a housing for housing the motor and comprising a handle and a battery mounting portion disposed below the handle; and

[0024] a switch held on the handle,

[0025] A light emitting portion for displaying an operation mode is provided on either the left or right side of the upper surface of the battery mounting portion.

[0026] Effects of the Invention

[0027] According to the present invention, the light emitted from the battery mounting portion can be easily visually recognized even in a state where the handle portion is gripped, and the visibility of the light emitting portion for notification is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional diagram of automatic packaging of screwdrivers.

[0029] Figure 2 It is a side view of the automatic packaging screwdriver.

[0030] Figure 3 It is a top view of the automatic packaging screwdriver.

[0031] Figure 4 yes Figure 3 AA line section view.

[0032] Figure 5 This is a perspective view omitting the left half-cut housing and the main body housing of the motor.

[0033] Figure 6 This is an exploded perspective view of the switch panel.

[0034] Figure 7 yes Figure 3 Enlarged cross-sectional view of line BB.

[0035] Description of Reference Numerals

[0036] 1…Automatic packaging screwdriver, 2…Main housing, 3…Gear box, 4…Casing, 5…Output unit, 9…Motor housing, 10…Handle housing, 11…Handle unit, 15…Motor, 18…Rotating shaft, 50…Battery mounting unit, 53…Controller, 54…Control circuit board, 55…Push button switch, 56…LED, 60…Switch plate, 61…Hole, 62…Actuating rod, 63…Square tube, 63a…Opening, 64…Display sheet, 65…Push button display unit, 66…Light emitting unit, 71…First spindle, 72…Clutch cam, 73…Coil spring, 74…Second spindle, 90…Push drive mechanism, 91…Rod, 92…Lever, 93…Sensor board. DETAILED DESCRIPTION

[0037] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0038] Figure 1 A perspective view of an automatic packaging screwdriver as an example of an electric tool is shown. Figure 2 A side view thereof is shown, Figure 3 A top view thereof is shown.

[0039] An automatic packaging screwdriver (hereinafter referred to as "screwdriver") 1 includes a main body housing 2. A cylindrical gear box 3 is assembled to the front side of the main body housing 2. A cylindrical outer shell 4 extending forward is attached to the front side of the gear box 3. An output unit 5 is provided within the gear box 3 and the outer shell 4. A feeder box 6 is provided in front of the outer shell 4. A stopper base 7 is provided at the front end of the feeder box 6. A hopper 8 for storing fastening screws is provided below the outer shell 4 and in front of the main body housing 2.

[0040] The main body housing 2 integrally includes a motor housing 9 and a handle housing 10. The motor housing 9 is formed into a straight, inclined shape that moves downward from the upper end connected to the gear box 3 toward the rear. The handle housing 10 is formed into a ring shape with upper and lower ends connected at the rear side of the motor housing 9. The handle housing 10 has a handle portion 11 extending in the vertical direction.

[0041] The left and right half-cases 2a and 2b are assembled with a plurality of screws 12, 12, ... screwed in from the left to form the main case 2. The gear box 3 is assembled to the front upper side of the main case 2 with four screws 13, 13, ... from the front.

[0042] like Figure 4 As shown, a motor 15 is housed in the motor housing 9. The motor 15 is an inner rotor type brushless motor having a cylindrical stator 16 and a rotor 17 disposed inside the stator 16. The motor 15 is supported in the motor housing 9 with a rotating shaft 18 provided on the rotor 17 extending upward along the inclination direction of the motor housing 9.

[0043] However, the motor 15 is arranged at a position close to the inner surface of the front side of the motor housing 9. Figure 5 As shown, support ribs 19, 19 are provided upright on the inner surface of the motor housing 9 at the front position to support the stator 16. On the upper rear side of the stator 16, a horizontal wall 20 is provided upright on the inner surface of the motor housing 9, connected to the support ribs 19, 19 and extending parallel to the rotating shaft 18.

[0044] The stator 16 has a stator core 21, upper and lower insulators 22A and 22B, and a plurality of coils 23, 23, ... . The sensor circuit board 24 is fastened to the lower insulator 22B from below by screws. The sensor circuit board 24 has a rotation detection element (not shown) on its upper surface. The rotation detection element detects the magnetic field of the permanent magnet 27 provided on the rotor 17. The wire rods of each coil 23 form a three-phase connection. The power line of the three-phase connection is led out from the rear side of the insulator 22B via the connector 25 to the controller 53 side described later. The signal line of the rotation detection element is also led out from the rear side of the sensor circuit board 24 to the controller 53 side.

[0045] The rotor 17 includes a rotating shaft 18 and a rotor core 26 surrounding the rotating shaft 18. A plurality of permanent magnets 27, 27, ... are fixed inside the rotor core 26.

[0046] The lower end of the rotating shaft 18 is rotatably supported by a lower wall 28 extending vertically from the inner surface of the motor housing 9 via a bearing 29. The lower wall 28 is spaced apart from the lower end of the transverse wall 20, and the connector 25 protrudes into the motor housing 9 from between the two walls 28 and 20.

[0047] The upper portion of the rotating shaft 18 is rotatably supported by an upper wall 30 erected on the inner surface of the motor housing 9 via a bearing 31. The upper end of the rotating shaft 18 includes a pinion gear 32 and protrudes into the gear box 3.

[0048] The fan 33 is provided on the rotating shaft 18 between the stator 16 and the bearing 31. The fan 33 is a centrifugal fan and is housed in a fan housing chamber 34 surrounded by the upper support ribs 19, the lateral wall 20, and the upper wall 30.

[0049] Multiple lower exhaust ports 35, 35, ... are formed outside the fan 33 and on the left and right side surfaces of the motor housing 9. These lower exhaust ports 35, 35, ... are arranged in a front-downward, oblique direction perpendicular to the rotation axis 18. Below the fan 33 and on the left and right side surfaces of the motor housing 9, multiple air inlet ports 36, 36, ... are formed in a line in the axial direction of the rotation axis 18. The total opening area of ​​the air inlet ports 36 is larger than the total opening area of ​​the lower exhaust ports 35.

[0050] In addition, two middle exhaust ports 37, 37 are formed on the left and right sides of the motor housing 9 at a position higher than the upper wall 30. Slits 38 ( ) are formed on the upper wall 30 and on the left and right sides of the bearing 29 so that the upper part of the upper wall 30 communicates with the fan housing chamber 34. Figure 5 ).

[0051] Furthermore, upper exhaust ports 39 are formed behind the gear box 3 and on both left and right side surfaces of the main body case 2. A gap 40 is formed between the lateral wall 20 and the upper wall 30 to allow the rear of the gear box 3 to communicate with the fan housing chamber 34.

[0052] Therefore, if Figure 5 As shown, a first cooling path 41 is formed in the main body housing 2. When the fan 33 rotates, this first cooling path 41 causes the outside air drawn in through the air intake 36 to rise within the motor housing 9, reach the fan housing chamber 34, and be discharged from the lower exhaust port 35. Furthermore, a second cooling path 42 is formed in the main body housing 2. This second cooling path 42 causes a portion of the air not discharged from the lower exhaust port 35 to rise through the slit 38 and be discharged from the middle exhaust port 37. Furthermore, a third cooling path 43 is formed in the main body housing 2. This third cooling path 43 causes another portion of the air not discharged from the lower exhaust port 35 to rise through the gap 40 and be discharged from the upper exhaust port 39.

[0053] A switch 45 is provided in the upper portion of the handle 11, which causes a trigger 46 to protrude forward. A forward / reverse switching lever 47 is provided above the switch 45. A forward / reverse lever switch (not shown) is provided between the switch 45 and the forward / reverse switching lever 47, which switches the forward / reverse position in response to operation of the forward / reverse switching lever 47. A lock button 48 is provided below the forward / reverse switching lever 47 to maintain the trigger 46 depressed.

[0054] A battery mounting portion 50 is formed at the lower portion of the handle housing 10. A battery pack 51 is slidably mounted on the battery mounting portion 50 from the rear. A terminal block 52 electrically connected to the battery pack 51 is provided in the battery mounting portion 50. A controller 53 is housed on the upper side of the terminal block 52. The controller 53 includes a control circuit board 54. In addition to the microcomputer and switch elements, Figure 6 and Figure 7 As shown in FIG. 5 , the control circuit board 54 further includes a push button switch 55 for mode switching and an LED 56 for displaying the mode switching. The push button switch 55 and the LED 56 are arranged along the left edge of the control circuit board 54 .

[0055] A switch plate 60 is provided on the upper left side of the control circuit board 54 and on the half-cut housing 2a. The switch plate 60 has a rectangular shape when viewed from above and is fixed in a state of being fitted into a hole 61 formed on the upper left side of the battery mounting portion 50. An actuating rod 62 that is lowered by a push operation from above is integrally formed on the switch plate 60. Figure 7 As shown, the action bar 62 is located directly above the push button switch 55 .

[0056] The rectangular tube portion 63 is formed integrally with the switch plate 60 in front of the actuating rod 62 and faces downward. The rectangular tube portion 63 is located directly above the LED 56. The through hole of the rectangular tube portion 63 forms an opening 63a on the upper surface of the switch plate 60.

[0057] A display sheet 64 is attached to the upper surface of the switch plate 60. The display sheet 64 displays a button display portion 65 covering the upper surface of the actuating bar 62 and a transparent light-emitting portion 66 covering the opening 63a of the square tube portion 63.

[0058] like Figure 4 As shown, the output unit 5 includes an intermediate shaft 70, a first main shaft 71, a clutch cam 72, a coil spring 73, and a second main shaft 74. A retaining plate 75 is assembled between the gear box 3 and the main body case 2.

[0059] The intermediate shaft 70 is arranged within the gearbox 3 with its axis oriented in the front-to-back direction. The front end of the intermediate shaft 70 is rotatably supported by the gearbox 3 via a bearing 76. The rear end of the intermediate shaft 70 is rotatably supported by a retaining plate 75 via a bearing 77. A bevel gear 78 is rotatably provided in the middle portion of the intermediate shaft 70 and meshes with the pinion gear 32 of the rotating shaft 18. A first gear 79 is integrally provided at the rear portion of the intermediate shaft 70.

[0060] The first main shaft 71 is disposed above the intermediate shaft 70 with its axis oriented in the front-to-rear direction. The rear end of the first main shaft 71 is rotatably supported by the retaining plate 75 via a bearing 80. A second gear 81 is provided at the rear of the first main shaft 71 for integral rotation. The second gear 81 meshes with the first gear 79.

[0061] The clutch cam 72 is coupled to the second gear 81 so as to be integrally rotatable via a plurality of balls 82 , 82 , ... A rear cam portion 83 is formed on the front surface of the clutch cam 72 .

[0062] The second main shaft 74 is coaxially disposed in front of the first main shaft 71. The second main shaft 74 is held by a sleeve 84 held by the gear box 3 and the housing 4 so as to be rotatable and movable forward and backward.

[0063] The front portion of the first spindle 71 is inserted into a bottomed hole 85 provided at the rear portion of the second spindle 74. A bearing 86 is fixed in the bottomed hole 85. The front end of the first spindle 71 is inserted into the bearing 86 with a clearance fit and is supported in the bottomed hole 85 so as to be rotatable coaxially with the second spindle 74.

[0064] The coil spring 73 is externally mounted on the first main shaft 71 . The rear end of the coil spring 73 abuts against the front surface of the clutch cam 72 . The front end of the coil spring 73 abuts against the rear surface of the bearing 86 .

[0065] A flange 87 is formed at the rear end of the second main shaft 74. A front cam portion 88 is formed on the rear surface of the flange 87. The front cam portion 88 faces the rear cam portion 83 of the clutch cam 72. The front cam portion 88 and the rear cam portion 83 engage with each other in the forward and reverse rotation directions while in contact with each other.

[0066] The second spindle 74 is urged forward by the coil spring 73. A stopper 89 is supported at the rear end of the sleeve 84. The flange 87 of the second spindle 74 abuts against the stopper 89, restricting the forward movement of the second spindle 74.

[0067] A bit holding portion 74a is formed at the front end of the second spindle 74. A tool bit such as a screwdriver bit can be attached to and detached from the bit holding portion 74a from the front.

[0068] A pressing drive mechanism 90 forming a mechanism portion of a pressing drive mode is provided in the main body housing 2. The pressing drive mechanism 90 includes a rod 91, a lever 92, and a sensor substrate 93.

[0069] The rod body 91 is provided separately from the first main shaft 71 and is movable forward and backward at the axis of the first main shaft 71. The rear end of the rod body 91 passes through the holding plate 75 and protrudes into the main body housing 2.

[0070] Lever 92 is positioned behind retaining plate 75. Lever 92 is rotatably held by left and right bosses 94, 94, protruding from the inner surface of main body housing 2. Lever 92 includes a pressing piece 95 protruding downward from behind rod body 91 and a detecting piece 96 protruding upward from the rear side of pressing piece 95. Detecting piece 96 is provided with a magnet 97.

[0071] The sensor substrate 93 is arranged behind the detection piece 96. The sensor substrate 93 includes a magnetic sensor such as a Hall element, and can detect changes in the magnetic field of the magnet 97 based on the rotation of the detection piece 96. The rod 92 is normally in the first rotation position ( ) where the detection piece 96 abuts against the front surface of the sensor substrate 93 due to the biasing force of the torsion spring 98. Figure 4 The position indicated by the solid line in the figure).

[0072] The rod 91 is in the advanced position pressed by the pressing piece 95 of the lever 92 in the first rotation position. The rod 91 in the advanced position has its tip abutting against the inner bottom surface of the bottomed hole 85 of the second spindle 74 in the advanced position.

[0073] Regarding the push drive mechanism 90, when the rod 91 moves backward, the rear end of the rod 91 presses the pressing piece 95 of the rod 92 backward, causing the rod 92 to rotate to the second rotational position indicated by the two-dot chain line. This causes the detection piece 96 to rotate forward and move away from the sensor substrate 93. Consequently, the sensor substrate 93, which detects changes in the magnetic field due to the movement of the magnet 97, outputs an on signal.

[0074] Operation signals from the switch 45, the forward / reverse lever switch of the forward / reverse switching lever 47, the sensor substrate 93, and the push button switch 55 are input to the microcomputer on the control circuit board 54. The microcomputer sets the rotation direction of the motor 15 based on the signal from the forward / reverse lever switch and drives the motor 15. The microcomputer sets the operation mode based on the operation signal from the push button switch 55.

[0075] The feed box 6 is biased toward a forward position protruding from the housing 4 by a coil spring 100. Fastening screws (not shown) pulled from the magazine 8 are inserted from below and are provided in the feed box 6. A conveying mechanism 101 is provided in the feed box 6, which feeds the fastening screws one by one to the screw tightening position determined by the tool head by retreating against the biasing force of the coil spring 100.

[0076] The mounting position of the stopper base 7 relative to the feed box 6 in the front-to-back direction can be adjusted. The mounting position is adjusted according to the length of the screw. The depth adjustment dial 102 is operated to adjust the protrusion of the tool head from the stopper base 7 to set the screw tightening depth.

[0077] Regarding the screwdriver 1 constructed in the above manner, if the button display portion 65 of the switch plate 60 is pressed, the actuating rod 62 descends, causing the button switch 55 to turn on. The microcomputer then switches the operating mode to the push-drive mode and causes the LED 56 to turn on. When the LED 56 turns on, its light passes through the square tube portion 63 and shines toward the opening 63a, causing the light-emitting portion 66 to emit light. If the button display portion 65 is pressed again, the actuating rod 62 descends, causing the button switch 55 to turn off. The microcomputer then switches the operating mode to the normal mode and causes the LED 56 to turn off. Consequently, the light-emitting portion 66 turns off.

[0078] At this time, if the operator holds the handle 11 with the right hand, the operator uses the left hand to press the button display portion 65 of the switch plate 60. Since the switch plate 60 is arranged on the left upper surface of the battery mounting portion 50, it can be easily operated.

[0079] When the operating mode is switched, the light emitting unit 66 turns on or off, allowing visual confirmation of the switching of the operating mode. At this time, the light emitting unit 66 is located on the left upper surface of the battery mounting portion 50, further forward than the handle 11. Therefore, the light emitting unit 66 is not blocked by the right hand holding the handle 11. Therefore, the operator can easily confirm whether the light emitting unit 66 is on or off.

[0080] Next, the usage status in specific operation modes will be described. First, the normal mode will be described.

[0081] The tool head is mounted on the tool head retaining portion 74a of the second main spindle 74, and the forward / reverse switching lever 47 is in the forward rotation position. Next, the operator grasps the handle portion 11 and brings the stopper base 7 into contact with the surface of the workpiece, such as a gypsum board. Next, the operator presses the trigger 46. As a result, the switch 45 is turned on, and power is supplied from the battery pack 51 to the motor 15 via the control circuit board 54. As a result, the rotor 17 rotates forward, and the rotation of the rotating shaft 18 is transmitted from the pinion gear 32 to the intermediate shaft 70. If the intermediate shaft 70 decelerates, the first main spindle 71 and the clutch cam 72 also rotate forward as a whole. However, the second main spindle 74 is in the forward position, and the front cam portion 88 is not engaged with the rear cam portion 83 of the clutch cam 72. Therefore, the second main spindle 7 does not rotate.

[0082] Next, the operator presses the handle 11 to advance the screwdriver 1. As a result, the feed box 6 retreats, overcoming the force of the coil spring 100. Simultaneously, the conveying mechanism 101 conveys one connecting screw, so that the initial screw is located in front of the tool head. If the initial screw contacts the workpiece, the second spindle 74 and the tool head retreat together, overcoming the force of the coil spring 73. Consequently, the front cam portion 88 of the second spindle 74 engages with the rear cam portion 83, and the rotation of the clutch cam 72 is transmitted to the second spindle 74. The tool head then rotates forward together with the second spindle 74, driving the screw into the workpiece.

[0083] As the screw is tightened, the screwdriver 1 moves forward and the stop base 7 comes into contact with the housing 4. Then, only the second spindle 74 moves forward as the screw is screwed in. If the front cam portion 88 separates from the rear cam portion 83, the rotation transmitted to the second spindle 74 is cut off and the tightening of the screw is ended. If the operator releases the pressing operation of the trigger 46, the switch 45 is disconnected and the rotation of the rotor 17 stops. If the tool head is separated from the screw, the feed box 6 is restored to the forward position with the help of the force of the coil spring 100. The second spindle 74 is also restored to the forward position with the help of the force of the coil spring 73. Therefore, if the operator presses the handle portion 11 to move the screwdriver 1 forward, the next screw is fed out and screwed in. Continuous screw tightening operation can be achieved by repeatedly performing the above operations.

[0084] On the other hand, in the push drive mode, the motor 15 is not driven even when the trigger 46 is pressed. The stopper base 7 is pressed against the workpiece to advance the screwdriver 1. When the feed box 6 and the second spindle 74 retract, the rod 91 abutting against the inner bottom surface of the bottomed hole 85 retracts.

[0085] The rear end of the rod body 91 then abuts against the pressing piece 95 of the rod 92, causing the rod 92 to rotate to the second rotational position as described above. Consequently, an on signal is output from the sensor substrate 93, and the microcomputer drives the motor 15 in response to this on signal. The front cam portion 88 then engages with the rear cam portion 83, transmitting the rotation of the clutch cam 72 to the second spindle 74. This causes the tool head to rotate in the forward direction along with the second spindle 74, enabling screw tightening.

[0086] Regardless of the operation mode, if the fan 33 rotates while the rotating shaft 18 rotates, external air is sucked in from the air inlet 36 on the side of the main body housing 2. The external air from the air inlet 36 passes through the first cooling path 41 and passes between the stator 16 and the rotor 17, and is then discharged to the outside from the lower exhaust port 35. Thus, the motor 15 is cooled. In addition, a portion of the external air that is not discharged from the lower exhaust port 35 passes through the second cooling path 42 and passes through the slit 38 and is then discharged to the outside from the middle exhaust port 37. Thus, the bearing 31 is cooled. In addition, another portion of the external air that is not discharged from the lower exhaust port 35 passes through the third cooling path 43 and passes through the gap 40 and is then discharged from the upper exhaust port 39. Thus, the retaining plate 75 and the gear box 3 are cooled.

[0087] The screwdriver 1 of the above embodiment includes a motor 15 and an output unit 5 driven by the motor 15. Furthermore, the screwdriver 1 includes a main body case 2 (housing) that houses the motor 15 and has a handle 11 and a battery mounting portion 50 disposed below the handle 11. Furthermore, the screwdriver 1 includes a switch 45 retained by the handle 11 and a control circuit board 54 housed in the battery mounting portion 50 and having an LED 56 (light-emitting component) mounted on its top surface. Furthermore, an opening 63a (hole) is formed on the left side of the top surface of the battery mounting portion 50 for visually confirming the light emitted by the LED 56 (first invention).

[0088] According to this configuration, the light emitted from the opening 63 a can be easily visually recognized even in a state where the handle portion 11 is gripped, and the visibility of the notification light emitting portion 66 is improved.

[0089] A switch plate 60 (a plate-shaped member) is mounted on the left upper surface of the battery mounting portion 50 via a hole 61 (a second hole), and an opening 63a is provided in the switch plate 60. Therefore, the light emitting portion 66 can be reliably visually recognized on the switch plate 60.

[0090] The switch plate 60 is provided with a button display portion 65 (operation portion) that triggers the lighting operation of the LED 56. Therefore, the button display portion 65 is easy to visually confirm and can be operated easily.

[0091] The button display unit 65 is used to switch the operation mode. Therefore, the operation mode can be easily switched by operating the button display unit 65.

[0092] The opening 63a is a through hole of the square tube portion 63 (tube portion) provided in the switch plate 60 and arranged directly above the LED 56. Therefore, the light of the LED 56 can be reliably guided to the opening 63a.

[0093] The main body case 2 includes left and right half-cut cases 2a and 2b, and the hole 61 is formed in the left half-cut case 2a. Therefore, the hole 61 can be easily formed.

[0094] Furthermore, in the screwdriver 1 of the above embodiment, a switch plate 60 having an opening 63 a for visually confirming light emitted by the LED 56 is provided on the left side of the upper surface of the battery mounting portion 50 (second invention).

[0095] Furthermore, a light emitting unit 66 (third invention) for displaying the operation mode is provided on the left side of the upper surface of the battery mounting unit 50 .

[0096] According to the above configuration, the light emitted from the opening 63 a can be easily visually recognized even in a state where the handle portion 11 is gripped, and the visibility of the notification light emitting portion 66 is improved.

[0097] The handle portion 11 is disposed in the left-right center portion of the main body housing 2. Therefore, the hand holding the handle portion 11 is less likely to obstruct visual confirmation of the opening 63a.

[0098] The opening 63a is located forward of the handle 11. This also makes it less likely that the hand holding the handle 11 will be obstructed from visually recognizing the opening 63a.

[0099] The light emitting component is the LED 56. Therefore, it is possible to emit light satisfactorily in the opening 63a.

[0100] The gear box 3, which houses the output unit 5, is assembled into the main body housing 2. A fan 33 is also provided, which is rotated by the motor 15. Furthermore, a third cooling path 43 (cooling path) is formed within the main body housing 2, through which air flows to cool the gear box 3 as a result of the rotation of the fan 33. Thus, the output unit 5 can be cooled via the gear box 3.

[0101] The following describes examples of changes.

[0102] The top view shape of the switch plate can be circular, oblong or other shapes.

[0103] The cylindrical portion forming the opening (hole) can be a circular cylinder or other shape rather than a square cylinder. The length is not limited to the above. As long as the opening is not directly above the LED, the cylindrical portion can also be formed at an angle.

[0104] The holes and operating parts can be arranged in reverse order, or side by side.

[0105] The hole and the operating portion may be integrally formed in the housing without providing a separate switch plate.

[0106] A plurality of light-emitting components such as LEDs and holes may be provided depending on the operation mode. The light-emitting components and holes may not be used for switching the operation mode. The light-emitting components and holes may also be used as indicators of the remaining capacity of the battery.

[0107] The hole and the operating portion may also be located on the right side of the housing instead of the left side of the housing. The hole and the operating portion may also be located on opposite sides of the housing.

[0108] The housing is not limited to a structure including left and right half-cut housings. The housing may also be a structure divided front and back.

[0109] The handle is not limited to a ring shape, and may be a straight line protruding downward from the output portion with a battery mounting portion provided at the lower end.

[0110] The screwdriver may not use a connecting screw. The present invention is not limited to screwdrivers, and may also be applied to other power tools such as impact screwdrivers, impact wrenches, and screwdriver drills.

Claims

1. An electric tool, characterized in that: include: motor; an output portion driven by the motor; a housing for housing the motor, comprising a handle and a battery mounting portion disposed below the handle, the housing being formed by assembling left and right half-cut housings; a switch held in the handle portion, wherein the motor is rotated by pressing a trigger protruding forwardly backward; as well as A control circuit board is housed in the battery mounting portion and has a light emitting component mounted on its upper surface. The handle is arranged at the center of the housing in the left-right direction and extends in the up-down direction. A hole for visually confirming the light emitted by the light emitting component from behind is formed through the half-cut housing in front of the handle portion and only on either left or right side of the upper surface of the battery mounting portion.

2. The electric tool according to claim 1, wherein: A plate-shaped member is mounted on the upper surface of the half-cut housing on the one side via a second hole, and the hole is provided in the plate-shaped member.

3. The electric tool according to claim 2, wherein: The plate-shaped member is provided with an operating portion that triggers the light-emitting member to emit light.

4. The electric tool according to claim 3, wherein: The operating unit is used to switch the operation mode.

5. The electric tool according to any one of claims 2 to 4, characterized in that: The hole is provided in the plate-shaped member and is a through hole of the cylindrical portion arranged immediately above the light-emitting member.

6. An electric tool, characterized in that: include: motor; an output portion driven by the motor; a housing for housing the motor, comprising a handle and a battery mounting portion disposed below the handle, the housing being formed by assembling left and right half-cut housings; a switch held in the handle portion, wherein the motor is rotated by pressing a trigger protruding forwardly backward; as well as A control circuit board is housed in the battery mounting portion and has a light emitting component mounted on its upper surface. The handle is arranged at the center of the housing in the left-right direction and extends in the up-down direction. A plate-like member is provided on the half-cut housing in front of the handle and only on either left or right side of the upper surface of the battery mounting portion. A hole is formed through the plate-like member for visually confirming the light emitted by the light-emitting member from the rear.

7. The electric tool according to claim 6, wherein: The plate-shaped member is provided with an operating portion that triggers the light-emitting member to emit light.

8. The electric tool according to claim 7, wherein: The operating unit is used to switch the operation mode.

9. The electric tool according to any one of claims 6 to 8, characterized in that: The hole is provided in the plate-shaped member and is a through hole of the cylindrical portion arranged immediately above the light-emitting member.

10. The electric tool according to any one of claims 6 to 8, characterized in that: The light emitting component is an LED.

11. The electric tool according to any one of claims 6 to 8, characterized in that: A gear box for accommodating the output portion is assembled to the housing. The electric power tool includes a fan that is rotated by the drive of the motor. A cooling path is formed in the housing, and air for cooling the gear box flows through the cooling path due to the rotation of the fan.

12. An electric tool, characterized in that: include: motor; an output portion driven by the motor; a housing for housing the motor, comprising a handle and a battery mounting portion disposed below the handle, the housing being formed by assembling left and right half-cut housings; and A switch is held in the handle portion, and the motor is rotated by pressing a trigger protruding forward backward. The handle is arranged at the center of the housing in the left-right direction and extends in the up-down direction. A light emitting portion for displaying an operation mode is provided in front of the handle portion and only on the half-cut housing on either the left or right side of the upper surface of the battery mounting portion.

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