JP2018183875A - Electric power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric power tool which allows diversified switching switches, a light emitting portion, character displays and the like to be arranged without impairing visibility and operability thereof, unlike a conventional impact-type screw tightening device that delivers impact force in a screw tightening direction, which has been enhanced in function recently so that an operation mode in which impact force varies according to screw tightening stages recently can be switched, which makes it difficult for diversified mode switching switches and a light emitting portion for notifying the operation modes to be arranged at one display portion.SOLUTION: A display portion 19 is arranged on an upper surface of a power source part 17 provided below a grip portion 15. The display portion 19 is expanded forward, and arranged to expand forward more than a front end of a controller 9 which controls operation of an electric power motor. This allows switch portions and character displays to be arranged more than before corresponding to an area where the display portion is expanded.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electric tool equipped with an electric motor as a drive source.

  For example, with regard to electric tools such as screw tighteners, a device has been devised to appropriately control the rotation speed and output of the electric motor so that the screws can be tightened smoothly without causing problems such as so-called cam-out. Yes. For this reason, in this kind of electric tool, the display part for enabling a user to visually confirm the rotation speed, output, etc. (operating state) of an internal electric motor is provided. Patent Document 1 below discloses a technique for protecting a display unit disposed on the rear surface of a tool body from an impact when dropped. Further, in Patent Document 2 below, a controller for controlling the operation of the electric motor at the lower part of the grip portion gripped by the user, and a display for visually displaying the operation state of the electric motor controlled by the controller, etc. The technique regarding the rotary impact tool which provided the part is disclosed.

Japanese Patent No. 5370751 JP 2012-139747 A

  The controller display unit that visually notifies the operating state of the power tool has the following problems. In recent years, especially for screw tightening machines such as rotary impact tools, it is possible to switch the operation mode according to the work content, the type of screw to be tightened, etc., and to make it possible to arbitrarily set the output rotation speed etc. As the size of the controller increases, the size of the controller tends to increase, and the display unit tends to increase in size. In addition, when the display unit is provided with a mode switch or a lighting switch for turning on / off the lighting device, the size can be further increased.

  However, since the display unit that displays various operation states collectively has a flat plate shape (display plate), it can be arranged adjacent to the controller, and it is necessary for the user to have visibility and a flat part. Considering this, there is a limit to the size of the display unit that is naturally allowed. On the other hand, if the display portion of the multi-function display is downsized, the visibility of each display and its character notation is impaired, and the operability of various switches is impaired.

  The present invention has been made in view of the related problems, and for a display unit that mainly displays an operation state of an electric motor or the like by a controller, enables more display without impairing its visibility and operability, Another object of the present invention is to allow various operation switches to be arranged.

  Said subject is solved by each following invention. A first aspect of the present invention is a power tool having a tool main body portion that includes an electric motor as a drive source, a grip portion that extends downward from the tool main body portion and is gripped by a user, and a power source portion at the tip of the grip portion. It is. In the first invention, the power supply unit includes a controller that controls the operation of the electric motor, and a display unit that is controlled by the controller and displays the operation state of the electric motor. In the first invention, the controller and the display unit each have a flat plate shape and are arranged in parallel to each other, and the display unit is arranged so as to protrude from the controller in the plane direction.

  According to the first aspect of the invention, since the display portion is arranged so as to protrude in the surface direction with respect to the controller, the displayable area of the display portion is increased only by the protruding portion, and more display or operation switches are provided. Can be arranged. Since a large number of display or operation switches are not arranged by reducing the size of the display or operation switches, the visibility and operability are not impaired.

  Conventionally, this type of display unit has been arranged so as not to protrude from the controller. In general, the operation switch and light emitting unit of the display unit are positioned directly above the button switch and LED (light emitting diode) mounted on the controller, so that the display unit does not normally protrude in the plane direction with respect to the controller. It was assembled so that it almost overlapped at the position. For this reason, the display unit has an area sufficient to cover the button switch and LED of the controller, and the operation switch and the light emitting unit are arranged within the range of the area, and the character notation for displaying the type is arranged. It was. As a result, the number of light emitting units and operation switches that can be arranged on the display unit is limited.

  In the first invention, the area of the display portion is increased by protruding from the controller within a range that does not cause problems such as being hidden by the user's hand holding the grip portion. If arranged, it is made by paying attention to the fact that more light emitting units and operation switches can be arranged in a portion that does not protrude.

  According to a second invention, in the first invention, the display unit includes an operation switch, a light emitting unit, and a character notation for displaying a type of the operation switch or the light emitting unit, and the character notation is in a plane direction with respect to the controller. It is a power tool displayed on the protruding part.

  According to the second invention, as a result of displaying the character notation in the protruding portion, there is a space in the portion that does not protrude from the controller, and more operation switches and light emitting units are arranged in the empty portion. be able to.

  A third invention is the electric tool according to the first or second invention, wherein the display unit and the controller are assembled to the power supply unit as separate components.

  According to the third aspect of the invention, it is possible to avoid the problem that the handleability and the assemblability as a component are impaired due to the display unit protruding in the surface direction and assembled to the controller.

  A fourth invention is the electric tool according to any one of the first to third inventions, wherein the display unit includes one illumination switch and two mode changeover switches.

  According to the fourth aspect of the invention, it is possible to display the character notation of the illumination switch or the character notation of the mode changeover switch in a portion protruding from the surface direction with respect to the controller.

  According to a fifth invention, in any one of the first to fourth inventions, a battery pack that can be charged as a DC power supply can be attached to the power supply unit, and a light emitting unit that displays the remaining capacity of the battery pack is displayed on the display unit. It is an electric tool having.

  According to the fifth invention, the character notation of the light emitting unit for displaying the remaining capacity can be displayed in a portion protruding from the surface direction with respect to the controller.

  A sixth invention is the electric tool according to any one of the first to fifth inventions, wherein the display unit is provided with two rows of light emitting unit rows arranged in the front and rear in which a plurality of light emitting units are arranged side by side.

  According to the sixth invention, a plurality of light emitting units can be arranged efficiently and orderly.

  A seventh invention is an electric tool according to any one of the first to sixth inventions, wherein a plurality of light emitting units having different display contents are arranged side by side on the left and right in the display unit.

  According to the seventh aspect, the light emitting units having different display functions can be arranged efficiently and orderly.

  The eighth invention is an electric motor, a tip tool holding portion that is disposed on the front side of the electric motor and driven by the electric motor, a tool main body portion that houses the electric motor, and extends downward from the tool main body portion. A grip portion that is held by a person, and a diameter-expanded portion disposed below the grip portion, housing the LED in the diameter-expanded portion, and providing a light-emitting portion of the LED on the upper surface of the diameter-expanded portion, This is an electric tool in which character displays related to LEDs are arranged in front of the light emitting unit.

  According to the eighth aspect of the present invention, the display unit can be expanded more forward than the substrate on which the LED is mounted in the region displaying the character display related to the LED, thereby improving the visibility and operability of the display unit. More switches and light emitting units can be arranged without loss.

  The ninth invention is an electric motor, a tip tool holding portion that is disposed on the front side of the electric motor and is driven by the electric motor, a tool main body portion that houses the electric motor, and extends downward from the tool main body portion. A grip portion that is held by a person, and a diameter-expanded portion disposed below the grip portion, housing the LED in the diameter-expanded portion, and providing a light-emitting portion of the LED on the upper surface of the diameter-expanded portion, This is an electric tool in which the LED and the light emitting unit are shifted in the surface direction in the vertical direction.

  According to the ninth aspect, by shifting the display unit in the plane direction with respect to the substrate on which the LED is mounted, the display unit can be expanded by the amount of the shift, and thereby the visibility and operation of the display unit can be increased. More switches and light emitting units can be arranged without impairing the performance.

  A tenth aspect of the present invention is a tool body having a rotary impact mechanism that gives an impact force in the screw tightening direction using an electric motor as a drive source, a grip that extends downward from the tool body, and is gripped by a user, and a grip It is an electric tool which has a power supply part at the front-end | tip. In a tenth aspect of the invention, the power supply unit is provided with a display unit that displays the operating state of the rotary impact mechanism. In the tenth aspect of the invention, the display unit is a batting force changeover switch for switching the batting force of the rotary batting mechanism, an batting force display unit for displaying the batting force, and an operation mode set in advance for the operating state of the rotary batting mechanism. The mode display part which alert | reports is comprised in the horizontal line. In a tenth aspect of the invention, in a specific operation mode, the rotational speed of the electric motor is rotated at a low speed in the initial stage of screw tightening, and is controlled to be switched to a high speed rotation when the screw tightening load exceeds a predetermined value. .

  According to the tenth aspect, the display unit can be arranged compactly when the area of the power supply unit is relatively small. The display unit is configured to be compact in the front-rear direction by arranging the hitting force changeover switch, the hitting force display unit, and the mode display unit in a horizontal row (side by side). In a specific operation mode set in advance, the electric motor is automatically switched to high-speed rotation in accordance with an increase in the screw tightening load, so that the screw tightening operation is facilitated.

  An eleventh invention is an electric tool according to the tenth invention, wherein the display unit emits light only from the light emitting unit provided in the mode display unit when the mode is switched to a preset operation mode.

  According to the eleventh aspect, it is possible to improve the visibility of the display unit with respect to switching to the preset operation mode.

  In a twelfth aspect based on the tenth or eleventh aspect, the striking force changeover switch has a switching function to the specific operation mode set in advance, in addition to the striking force switching function of the rotary striking mechanism, and the It is an electric tool having a function of switching between lighting and extinguishing of a lighting tool provided in the tool body.

  According to the twelfth aspect of the present invention, the display unit can be made compact by providing a single striking force changeover switch with a plurality of switching functions.

  A thirteenth aspect of the present invention is an electric tool having a tool main body portion that includes an electric motor as a drive source, a grip portion that extends downward from the tool main body portion and is gripped by a user, and a power source portion at the tip of the grip portion. . In a thirteenth aspect of the invention, the power supply unit is provided with a display unit that displays the operation state of the tool main body unit. In a thirteenth aspect of the invention, the display unit has a configuration in which two rows of light emitting unit rows in which a plurality of light emitting units are arranged in a horizontal row on the left and right are provided in the front and rear.

  According to the thirteenth invention, it is possible to efficiently arrange a large number of light emitting units and to increase the functionality of the display unit.

It is a whole perspective view of the electric tool concerning this embodiment. This figure has shown the state seen from the diagonally right front. It is a longitudinal cross-sectional view of the electric tool which concerns on this embodiment. It is a left view of a power supply part. It is the figure which looked at the power supply part from the arrow (IV) direction in FIG. 3, Comprising: It is a top view of the display part which concerns on 1st Embodiment. It is the (V) part enlarged view of FIG. 3, Comprising: It is a longitudinal cross-sectional view of the display part which concerns on 1st Embodiment. It is a left view of a power supply part. It is the figure which looked at the power supply part from the arrow (VII) direction in FIG. 6, Comprising: It is a top view of the display part which concerns on 2nd Embodiment. It is the (VIII) part enlarged view of FIG. 6, Comprising: It is a longitudinal cross-sectional view of the display part which concerns on 2nd Embodiment. It is a top view of the display part concerning a 2nd embodiment. It is a top view of the display part concerning a 3rd embodiment. It is a top view of the display part concerning a 4th embodiment. It is a top view of the display part concerning a 5th embodiment. It is a top view of the display part concerning a 6th embodiment. It is a figure which shows the fluctuation | variation of the rotation speed of an electric motor with a line graph. This figure shows the “fastest” in the batting mode. It is a figure which shows the fluctuation | variation of the rotation speed of an electric motor with a line graph. In the figure, a broken line (2) indicates “strong” in the batting mode, a broken line (3) indicates “medium” in the batting mode, and a broken line (4) indicates “weak” in the batting mode. It is a figure which shows the fluctuation | variation of the rotation speed of an electric motor with a line graph. In the figure, the broken line (5) indicates the forward rotation of the text mode, and the broken line (6) indicates the reverse rotation of the text mode. It is a figure which shows the fluctuation | variation of the rotation speed of an electric motor with a line graph. In the figure, a broken line (7) indicates the forward rotation of the easy mode, and a broken line (8) indicates the reverse of the easy mode. It is a whole perspective view of the electric tool provided with the display part concerning a 7th embodiment. It is a top view of the display part concerning a 7th embodiment.

  Next, an embodiment of the present invention will be described with reference to FIGS. FIG.1 and FIG.2 has shown the electric tool 1 equipped with the electric motor 20 which concerns on this embodiment as a drive source. In this example, as an example of the electric tool 1, a so-called impact-type screw tightening machine (impact driver) is shown. In the following description, with respect to the front-rear direction of the electric power tool 1, the output side (tip tool side) is the front side, and the front side as viewed from the user is the rear side. The left and right directions are used based on the user who holds the grip portion 15.

  The electric tool 1 includes a tool main body 10 and a grip 15 provided in a state of protruding downward from the lower surface of the tool main body 10. The tool body 10 includes a substantially cylindrical body case 11. The rear surface side of the main body case 11 is closed by the rear case 12. The rear case 12 is fixed in a state of closing the rear surface side of the main body case 11 with two screws.

  The grip portion 15 is a portion that is gripped when the user uses the electric power tool 1, and a trigger 16 that is pulled by the user with a fingertip is provided at the upper front portion of the grip portion 15. When the trigger 16 is pulled, the main switch 18 accommodated in the grip portion 15 is turned on to activate the electric motor 20 as a drive source.

  The main body case 11 and the grip portion 15 have a halved structure in which the left and right halved cases are combined and integrated. The mating surface of the half structure is along the axial direction of the motor shaft 24. The main body case 11 and the grip portion 15 have a halved structure that can be divided into right and left by this mating surface. The half structure of the main body case 11 and the grip portion 15 is coupled to each other by a total of eight screws 2.

  A power supply unit 17 for mounting a battery pack 40 as a power supply of the electric tool 1 is provided at the lower part of the grip unit 15. This power supply part 17 is provided in the state (diameter enlarged part) mainly projected ahead (right side in FIG. 1). A battery pack 40 is mounted on the lower surface side of the power supply unit 17. On the upper surface of the power supply unit 17, a display unit 19 for visually informing the operation state of the electric power tool 1 is provided. The present embodiment is characterized by the display unit 19. The features of the display unit 19 will be described later.

  As shown in FIG. 2, the electric motor 20, the planetary gear mechanism 30, the drive shaft 31, the rotary impact mechanism 32, and the anvil 33 are accommodated in the main body case 11 in order from the rear side. The rotational output of the electric motor 20 is transmitted to the anvil 33 through the planetary gear mechanism 30 and the rotary impact mechanism 32.

  The rotary hitting mechanism 32 has a function of converting the rotation of the drive shaft 31 into a rotary hitting operation with respect to the anvil 33. The hammer 32a is coaxially rotated with respect to the drive shaft 31 and supported so as to be axially movable. A compression spring 32b that biases the hammer 32a toward the tip side and a steel ball 32c that restricts the axial movement and rotation of the hammer 32a are provided.

  The anvil 33 is coaxially supported at the tip of the drive shaft 31 so as to be relatively rotatable. The shaft portion (output shaft 36) of the anvil 33 is supported by a cylindrical bearing 34 so as to be rotatable about the axis with respect to the distal end portion of the main body case 11.

  After the start of screw tightening, at a stage where the screw tightening load is small, the anvil 33 rotates in the screw tightening direction integrally with the drive shaft 31 via the rotary impact mechanism 32. When the screw tightening progresses and the screw tightening load exceeds the rotational force transmitted to the drive shaft 31, the hammer 32a moves backward in the axial direction while rotating relative to the drive shaft 31 against the compression spring 32b. When the hammer 32a moves backward against the compression spring 32b, the engagement state with the anvil 33 is released. For this reason, the hammer 32a rotates while moving forward by the urging force of the compression spring 32b, and strikes the anvil 33 in the screw tightening direction. A tool holding portion 35 for mounting a tip tool (not shown) such as a driver bit or a socket bit is provided at the tip portion of the output shaft 36 protruding from the front portion of the main body case 11.

  The electric motor 20 is a DC brushless motor, and includes a stator 21 fixed inside the main body case 11 and a rotor 22 rotatably supported on the inner peripheral side of the stator 21 via a motor shaft 24. . The motor shaft 24 is rotatably supported around its axis via two front and rear bearings 25 and 26. Ball bearings (ball bearings) are used for the bearings 25 and 26, respectively. The front bearing 25 is held by an intermediate partition wall 27 that partitions the main body case 11 forward and backward. The inside of the main body case 11 is partitioned by the intermediate partition wall 27 into the electric motor 20 side (rear side) and the rotary impact mechanism 32 side (front side). A cooling fan 28 is mounted on the motor shaft 24 between the intermediate partition wall 27 and the rotor 22. A so-called centrifugal fan is used as the cooling fan 28. The rear bearing 26 is held by a bearing holding portion 12 a provided on the inner surface of the rear case 12.

  A sensor substrate 23 having a magnetic sensor for detecting the rotational position of the rotor 22 is disposed behind the stator 21. The sensor substrate 23 has a substantially disk shape and is disposed in a state of facing the rear end surface of the stator 21. The inner peripheral hole 23b of the sensor substrate 23 is formed as a large-diameter circular hole. As shown in the drawing, the rear bearing 26 and the bearing holding portion 12a enter the inner peripheral hole 23b of the sensor substrate 23. As a result, the machine length of the tool body 10 (the length in the motor axis direction) is being made compact. The sensor substrate 23 is screwed at three equal positions in the circumferential direction by three set screws 23a along the rear surface of the electrically insulating member of the stator 21. In the present embodiment, the cooling fan 28 is disposed on the front side of the rotor 22 and the sensor substrate 23 is disposed on the rear surface side of the stator. However, the cooling fan and the sensor substrate are reversed in the front-rear direction. The same can be applied to the arranged electric motor.

  A lighting tool 5 is provided at the front part of the tool body 10. An LED (light emitting diode) is used for the illumination tool 5. The illumination tool 5 is covered with a transparent cover 5a. The working part is brightly illuminated by the illuminator 5 to facilitate work in a dark place.

  A changeover switch 6 for switching the rotation direction of the output shaft 36 is disposed on the lower surface side of the tool main body 10 and at the base of the grip portion 15. By switching the changeover switch 6 to the left or right, the output shaft 36 can be rotated in the screw tightening direction or the screw loosening direction.

  A loop-shaped hand strap 3 is attached to the rear portion of the power supply unit 17. The hand strap 3 is coupled by a screw 2 on the rear side of the two screws 2 that couple the left and right halved structures of the grip unit 15 in the power supply unit 17. By passing the wrist through the hand strap 3, it is possible to prevent the electric tool 1 from being accidentally dropped.

  As shown in FIGS. 2 and 3, the power supply unit 17 accommodates a flat plate-shaped controller 9. The controller 9 has a configuration in which a control board 7 including a motor control circuit, a power supply circuit, and the like is accommodated in a case 8 having a rectangular bottom. A capacitor 7 a is mounted on the upper surface of the control board 7. The control board 7 is accommodated in the case 8 in a resin-molded and insulated state. On the lower surface side of the controller 9, positive and negative connection terminals for electrically connecting the battery pack 40 are provided. The two power supply wires connected to the positive and negative connection terminals are drawn upward, wired in the grip portion 15, and connected to the sensor substrate 23. The lower part of the sensor substrate 23 projects outward from the stator 21, and two power lines are connected to the front surface of the projecting part.

  The battery pack 40 can be attached to the power supply unit 17 by sliding the battery pack 40 from the front side to the rear side with respect to the lower surface of the power supply unit 17. The battery pack 40 is, for example, a lithium ion battery having an output voltage specification of 14.4 V, and can be repeatedly used by being removed and charged with a separately prepared charger.

  A display unit 19 for displaying the remaining capacity of the battery pack 40 and the operating state of the tool body unit 10 is provided on the upper surface of the power supply unit 17. In the present embodiment, in addition to various displays, the display unit 19 is provided with a lighting switch for switching the on / off state of the lighting fixture 5 and a mode switching switch for switching the operation mode, and functions as an operation panel. The display unit 19 has a substantially trapezoidal flat plate shape with a short side on the front side, and is arranged above the controller 9. The display unit 19 is a separate component from the controller 9 and is fitted and attached to a window provided on the upper surface of the power supply unit 17.

  As shown in FIGS. 3 to 5, the front portion of the display unit 19 is disposed so as to protrude forward from the front end of the controller 9. The display unit 19 displays three switch units S1, S2, and S3 and a total of nine light emitting units L1 to L9. The three switch portions S1, S2, and S3 are arranged side by side along the rear end side of the display portion 19. The three light emitting units L1 to L3 are arranged side by side between the switch unit S1 and the switch unit S2. The remaining six light emitting portions L4 to L9 are arranged side by side along the front end side of the display portion 19 side by side. The three light emitting units L1 to L3 are arranged side by side on the rear side of the display unit 19 to form a rear light emitting unit row, and the six light emitting units L4 to L9 are arranged on the front side of the display unit 19. The front side light emitting section row is arranged side by side horizontally.

  On the control board 7 of the controller 9, three button switches d1, d2, d3 are mounted corresponding to the switch portions S1, S2, S3. Switch portions S1, S2, and S3 are arranged directly above the three button switches d1, d2, and d3. When each switch unit S1, S2, S3 is pushed with a fingertip, the corresponding button switch d1, d2, d3 is turned on / off. As shown in FIG. 4 and FIG. 7, the switch parts S1, S2, S3 position the cylindrical body part directly above the corresponding button switches d1, d2, d3, and display the cylindrical body part via the hinge part. The display unit 19 is supported by the unit 19 and arranged in a direction inclined to the left and right as viewed from the hinge unit, so that the display unit 19 is compact in the front-rear direction.

  Three LEDs e1, e2, and e3 are mounted on the control board 7 corresponding to the light emitting portions L1 to L3 arranged between the switch portion S1 and the switch portion S2. Light emitting portions L1, L2, and L3 are disposed directly above the LEDs e1, e2, and e3. The light emission portions L1, L2, and L3 are irradiated with light emitted from the LEDs e1, e2, and e3, and the light emission portions L1, L2, and L3 are turned on.

  Six LEDs e4 to e9 are mounted side by side along the front edge of the control board 7. As shown in FIG. 4, the six light emitting portions L4 to L9 are located at positions shifted forward from the six LEDs e4 to e9. As shown in FIG. 5, the light emitted from the LEDs e4 to e9 is irradiated to the corresponding light emitting units L4 to L9 via the light guides 19a provided to be inclined obliquely upward and forward. The six light emitting portions L4 to L9 arranged at positions shifted forward through the light guide portion 19a are arranged at positions protruding forward from the front end of the controller 9.

  According to the display unit 19 configured as described above, since the display area of the display unit 19 can be enlarged forward, more light emitting units and switch units are arranged without impairing visibility and operability. Will be able to.

  In addition, since the display unit 19 is configured to extend to the front side and the side opposite to the grip unit 15, the display unit 19 is not obstructed by a hand holding the grip unit 15 and becomes difficult to see. Visibility can be secured on the display unit 19.

  Further, since the display unit 19 and the controller 9 are assembled to the power source unit 17 as separate components, the display unit 19 protrudes from the controller 9 in the surface direction and is assembled as a component. The problem that handling property and assembly property are impaired can be avoided.

  Various modifications can be made to the embodiment described above. For example, FIGS. 6 to 8 illustrate the display unit 50 of the second embodiment. The members and configurations that do not need to be changed are assigned the same reference numerals and the description thereof is omitted. The display unit 50 according to the second embodiment also has a substantially trapezoidal flat plate shape with a short side on the front side. The display unit 50 displays three switch units S1, S2, and S3 and a total of nine light emitting units L1 to L9. The three switch portions S1, S2, and S3 are arranged side by side along the rear end side of the display portion 19. The three light emitting units L1 to L3 are arranged side by side between the switch unit S1 and the switch unit S2. The remaining six light emitting portions L4 to L9 are arranged directly above the LEDs e4 to e9 via the light guide portion 50a. For this reason, in the display unit 50 of the second embodiment, the light emitting units L4 to L9 are on the front row side of the switch units S1, S2, and S3, and left and right with a certain empty area from the front edge of the display unit 50. Are arranged side by side. A range corresponding to this empty area protrudes forward from the front end of the controller 9. In the protruding area, characters corresponding to the light emitting portions L5 to L9 are displayed as described later.

  On the control board 7 of the controller 9, three button switches d1, d2, d3 are mounted corresponding to the switch portions S1, S2, S3. Switch portions S1, S2, and S3 are arranged directly above the three button switches d1, d2, and d3. When each switch unit S1, S2, S3 is pushed with a fingertip, the corresponding button switch d1, d2, d3 is turned on / off.

  Three LEDs e1, e2, and e3 are mounted on the control board 7 corresponding to the light emitting portions L1 to L3 arranged between the switch portion S1 and the switch portion S2. Light emitting portions L1, L2, and L3 are disposed directly above the LEDs e1, e2, and e3. The light emission portions L1, L2, and L3 are irradiated with light emitted from the LEDs e1, e2, and e3, and the light emission portions L1, L2, and L3 are turned on.

  In the second embodiment, specific display contents of the display unit 50 are shown in FIG. The switch unit S1 is displayed with the text “Easy”. When the switch unit S1 is pushed and operated, the light emitting unit L4 emits light to notify that the operation mode of the power tool 1 has been switched to the “easy” mode. When the operation mode is switched to the “Easy” mode, the electric motor rotates at a low speed in the initial stage of screw tightening and is slowly tightened. The screw is securely tightened by increasing the force. When the switch portion S1 is pressed again, the light emitting portion L4 is turned off and the “easy” mode is canceled.

  On the switch unit S2, a character display of “light” is displayed. When the switch unit S2 functioning as a lighting switch is pushed and operated, the lighting device 5 can be switched between an on state and an off state. In the ON state of the illuminator 5, when the trigger 16 is pulled, the illuminator 5 is turned on. When the pulling operation of the trigger 16 is canceled, the illuminator 5 is turned off after a predetermined time. By turning on the illuminating tool 5, the work site is brightly illuminated, so that screwing work in a dark place or the like can be performed quickly and reliably. When the lighting fixture 5 is in the off state, the lighting fixture 5 is not lit even if the trigger 16 is pulled. When the trigger 16 is pulled, it can be confirmed that the lighting device 5 is turned on if it is turned on, and if it is not turned on, it is turned off.

  The remaining capacity of the battery pack 40 is notified by the three light emitting units L1, L2, and L3 disposed between the switch unit S1 and the switch unit S2. The three light emitting portions L1, L2, and L3 are surrounded by a dry battery symbol frame 50b so that the remaining capacity of the battery pack 40 can be determined at a glance. When the remaining capacity of the battery pack 40 is, for example, 50% or more, the three light emitting units L1, L2, and L3 are all turned on, and the number of the light emitting units L1, L2, and L3 that are turned on as the remaining capacity decreases. Less. In a state where one light emitting unit L3 is lit, the remaining capacity of the battery pack 40 is, for example, less than 20% and is low, and it is notified that charging is necessary.

  On the switch portion S3, the characters “striking” are displayed. When the switch portion S3 is pushed and operated, the operation of the electric power tool 1 is switched to the “hitting” mode (impact mode). Of the six light emitting units L4 to L9 in the front row, five light emitting units L5 to L9 excluding the light emitting unit L4 corresponding to the “easy” mode are surrounded by a frame 50c displayed with the switch unit S3 as a base point. Yes. Of the five light emitting portions L5 to L9, the right four light emitting portions L5 to L8 are lit according to the magnitude of the striking force. On the front side of the four light emitting portions L5 to L8, characters “fastest”, “strong”, “medium”, and “weak” are displayed from the right side. On the front side of the remaining one light emitting portion L9 in the foremost row, a character display “for text” is displayed.

  When the switch unit S3 on which the character display of “blow” is displayed is pressed and the light emitting unit L9 on which the character display of “for text” is emitted, the operation mode of the power tool 1 is switched to the “for text” mode. Change. “Tex” mode is an operation mode that assumes so-called tex screw tightening work. At the beginning of screw tightening, high speed rotation and quick tightening are performed. The motor 20 automatically switches to medium speed rotation, and the number of strikes (blow force) is suppressed. By suppressing the impact force at the final stage of screw tightening, it is possible to avoid screw breakage and so-called cam head skipping.

  When the switch unit S3 is pressed in the “for text” mode, the light emitting units L5 to L8 are changed to L5 (“fastest”) → L6 (“strong”) → L7 (“medium”) → L8 (“weak”) for each pressing operation. Light up sequentially in the order of). When the light emitting portion L5 is turned on, the output rotational speed of the electric motor 20 is the fastest and the impact force is maximized, and the output rotational speed of the electric motor 20 is decreased in the following order so that the impact force is “strong” → “medium” → “ Weak " As described above, the output rotation speed region of the electric motor 20 can be switched in four stages, and the magnitude of the striking force can be switched in four stages according to the screw length, the material of the material to be tightened, and the like.

  14 to 17 show rough control states of the rotational speed of the electric motor 20 in each operation mode. As shown by the broken line (1) in FIG. 14, the rotation speed of the electric motor 20 is the highest after the start (t1) time in the hitting fastest mode in which all four light emitting portions L5, L6, L7, and L8 are lit in the hitting mode. Revolutions r1 (rpm) is reached. In this fastest impact mode, the rate of increase (acceleration rate) of the rotational speed is set to 1 (% / ms). In this impact fastest mode, the rotational speed of the electric motor 20 is the same during forward rotation (when tightening screws) and during reverse rotation. The maximum rotational speed r1 can be set to 3000 (r.p.m), for example.

  As shown by the broken line (2) in FIG. 15, in the striking strength mode in which the three light emitting portions L6, L7, and L8 are lit in the striking mode, the rotation speed of the electric motor reaches r4 (r.p.m) at t4 hours after activation. In the batting mode in which the two light emitting portions L7 and L8 are lit in the batting mode, the rotational speed of the electric motor 20 reaches r3 (r.p.m) at time t3 after starting as shown by the broken line (3) in FIG. In the batting weak mode in which one light emitting unit L8 is lit, the rotational speed of the electric motor 20 reaches r2 (r.p.m) at t2 hours after the start as shown by the broken line (4). In each of the “strong”, “medium”, and “weak” modes of the batting mode, the acceleration rate is set to 3 (% / ms). In each of the “strong”, “medium”, and “weak” modes, fluctuations in the rotational speed are the same during forward rotation and reverse rotation. The rotation speeds r2, r3, and r4 can be set to 900 (r.p.m), 1800 (r.p.m), and 2800 (r.p.m), respectively.

  FIG. 16 shows fluctuations in the rotational speed of the electric motor 20 in the “text mode” in which the light emitting unit L9 is turned on in the impact mode. At the time of forward rotation in which the screw tightening is performed in the tex mode, the rotational speed of the electric motor 20 reaches the maximum rotational speed r1 (r.p.m) at t1 time after starting as shown by the broken line (5). At the time t5 when the number of hits is counted twice at the maximum number of revolutions r1 (r.p.m), the number of revolutions of the electric motor 20 is reduced to r5 (r.p.m) and the striking force is suppressed. As indicated by the broken line (6), at the time of reverse rotation, after reaching the maximum rotation speed at the same acceleration rate, the rotation speed of the electric motor 20 is maintained at the maximum rotation speed r1 (r.p.m) regardless of the number of hits. The acceleration rate until reaching the maximum rotational speed r1 (r.p.m) is set to 1 (% / ms) as in the fastest mode (FIG. 14) at the time of forward rotation and reverse rotation. The rotational speed r5 (r.p.m) can be set to 1400 (r.p.m), for example.

  FIG. 17 shows fluctuations in the rotational speed of the electric motor 20 in the easy mode in which the light emitting unit L4 is turned on. During forward rotation with screw tightening in the easy mode, as indicated by the broken line (7), the engine is accelerated at an acceleration rate of 3 (% / ms) after startup and maintains a low speed state where the rotational speed reaches r5 (rpm). . At the rotation speed r5 (rpm), for example, at the time t6, the first hit count is counted, and at t7, the fifteenth hit count is counted, the rotation speed of the electric motor 20 increases in a quadratic curve. The maximum rotational speed r1 (rpm) is reached, thereby increasing the striking force. As indicated by the broken line (8), at the time of reverse rotation, the vehicle is accelerated at an acceleration rate of 1 (% / ms), reaches the maximum rotational speed r1 (r.p.m) after t1 time, and thereafter is maintained at the maximum rotational speed r1 (r.p.m). Note that the rotation speed r5 (r.p.m) in the easy mode may be set to a rotation speed different from the rotation speed r5 (r.p.m) in the text mode.

  As described above, the number of rotations of the electric motor 20 in each mode is finely controlled in accordance with the type of screw to be tightened and the tightening material, whereby various types of screw tightening are efficiently performed. Yes.

  As described above, according to the second embodiment, the display unit 50 is arranged in a state in which the front side protrudes forward from the front end of the controller 9. In the second embodiment, the character display corresponding to the light emitting units L <b> 5 to L <b> 9 in the front row is arranged at a position protruding forward from the front end of the controller 9. For this reason, the displayable area of the display unit 50 is increased only in the portion that protrudes forward, and by arranging the character display in the protruding region, the visibility of the character display and the operability of the switch units S1 to S3 are improved. Can be placed without loss.

  Generally, the character display, light-emitting display, or operation switch on the display unit is positioned directly above the button switch or LED (light-emitting diode) mounted on the controller board, so that it protrudes from the controller when viewed in plan as in the past. If the display unit is not large enough, it is necessary to arrange character display, light emission display, or operation switches within the area, and as a result, the number of light emission units and operation switches that can be arranged on the display unit. Was subject to restrictions.

  According to the display unit 50 of the second embodiment, the area is expanded forward so as not to cause problems such as being hidden by the user's hand holding the grip unit 15, and protruded in the surface direction from the front end of the controller. By arranging it, it is possible to arrange a character display or a light emitting display also in the protruding portion, and thereby it is possible to arrange more display or operation switches without deteriorating the visibility and operability. It becomes like this. In the second embodiment, one illumination switch S2 and two mode changeover switches S1 and S3 can be arranged on the display unit 50.

  The arrangement of the various mode selector switches or the light emitting units of the display unit 50 can be changed as appropriate. In the display unit 60 of the third embodiment shown in FIG. 10, “mode” is displayed on the switch unit S <b> 1 instead of the “Easy” character display of the second embodiment. Two light emitting portions 61 and 62 are arranged in a frame 60a with the switch portion S1 as a base point. The light emitting part 61 is a light emitting part corresponding to the LEDe4 on the control board 7, and the light emitting part 62 is a light emitting part corresponding to the LEDe5 on the control board 7. In the third embodiment, the LEDe 5 is arranged on the control board 7 so as to be shifted to the LEDe 4 side (right side in FIG. 10). The light emission unit 61 is displayed with the word “Assist”, and the light emission unit 62 is displayed with the word “Custom”. Character display of “Assist” and “Custom” is arranged in an area protruding forward from the front end of the controller 9.

  When the switch portion S1 with the “mode” character display is pressed and operated, the light emitting portion 61 with the “assist” character display emits light, and when pressed again, the light emitting portion 62 with the “custom” character display is displayed. Emits light. In the “assist” mode, by rotating at a low speed at the beginning of hitting and automatically switching to a high speed after hitting a certain number of times, even an unskilled worker can perform fast and reliable screw tightening. In the “custom” mode, the number of rotations of the electric motor 20 arbitrarily set by the user can be switched.

  As in the second embodiment, the remaining capacity of the battery pack 40 is displayed by the three light emitting units L1 to L3 surrounded by the frame 50b. Further, the text mode is switched by the switch portion S3 on which the character “striking” is displayed. In the third embodiment, in the text mode, the output rotation speed of the electric motor 20 is switched in three stages and the striking force is switched in three stages, and the characters “strong”, “medium”, and “weak” are displayed, respectively. The light emitting units L6, L7, and L8 emit light and are notified. The character display “strong”, “medium”, “weak” of the light emitting units L6, L7, L8 and the character display “for text” of the light emitting unit L9 are all displayed in an area protruding forward from the front end of the controller 9. ing.

  FIG. 11 shows the display unit 70 of the fourth embodiment. The display unit 70 of the fourth embodiment is different from the display unit 60 of the third embodiment in the position of the remaining capacity display unit of the battery pack 40. About the member and structure which do not require a change, the description is abbreviate | omitted using the code | symbol same as 1st-3rd embodiment. In 4th Embodiment, the light emission parts L1-L3 which display the remaining capacity of the battery pack 40 are similarly enclosed by the frame 50b, and are arrange | positioned at the front row | line | column side. For this reason, the LEDs e1 to e3 are mounted on the control board 7 along the front end.

  In the fourth embodiment, the position of the switch portion S1 on which “mode” is displayed is the same as that in the third embodiment, but the frame 70a extends leftward with the switch portion S1 as a base point. Within the frame 70a, a light emitting unit 71 on which “Assist” is displayed and a light emitting unit 72 on which “Custom” is displayed are arranged. For this reason, LEDs e4 and e5 are mounted on the left side of the button switch d1 on the control board 7. In the fourth embodiment, the switching function of the switch portion S1 on which the characters “mode” are displayed is the same as that of the third embodiment, and the “assist” mode in which the speed is automatically increased by increasing the screw tightening load, and the rotation speed “Custom” mode can be switched.

  Each embodiment described above can be further modified. For example, in the third embodiment, the switch unit S1 with the “mode” character display is arranged on the right side, and the switch unit S3 with the “blow” character display is arranged on the left side. The arrangement may be reversed. It is good also as a structure which arrange | positions light emission part L1-L3 which displays the remaining capacity of the battery pack 40, and switch part S2 by which the character display of "light" was made right and left.

  In addition, the display units 19, 50, 60, and 70 exemplify a configuration having a trapezoid having a short side on the front side, but other shapes such as a trapezoid, a rectangle, a parallelogram, a round shape, and an oval shape having a short side on the rear side. The same applies to the shape display section.

  The illustrated display unit 19 (50, 60, 70) includes two mode changeover switches (switches S1, S3), remaining capacity indications L1 to L3 of the battery pack 40, and an on / off changeover switch (switch) of the lighting fixture 5. The configuration including the display portion L4 to L9 for displaying various states is illustrated, but a mode changeover switch (switch portion) having other functions or a light emitting portion can be additionally provided.

  About the shape of each light emission part L1-L9, it can change into other shapes, such as not only the rectangle which was illustrated but trapezoid, circular, and oval. Moreover, about the luminescent color of each light emission part L1-L9, it can change arbitrarily to other colors, such as red, blue, green. Each function can be divided into groups, and different emission colors can be set for each group.

  FIG. 12 shows a display unit 80 according to the fifth embodiment. The display unit 80 has a rectangular flat plate shape with corners having arc shapes, a switch unit 81 on which “mode” characters are displayed, a switch unit 82 on which characters “blow” are displayed, and 2 Two circular light emitting units 83, 84, three rectangular light emitting units 85, 86, 87, and a battery pack remaining capacity display unit 88 are provided. The switch unit 81 is disposed near the right end of the display unit 80, and the remaining capacity display unit 88 is disposed near the left end of the display unit 80. The remaining capacity display unit 88 has a configuration in which three light emitting units 88a arranged in the front-rear direction are arranged in a frame unit 88b simulating a dry battery. An LED mounted on the control board 7 is located directly below the three light emitting units 88a. If the remaining capacity of the battery pack 40 is sufficient, the three light emitting units 88a are turned on. When the remaining capacity is reduced, the number of lighting is two or one, and it is notified that charging is necessary.

  The switch part 82 is arranged next to the right side of the remaining capacity display part 88. The two circular light emitting units 83 and 84 are arranged near the front end of the display unit 80. The light emitting unit 83 is disposed on the left side of the switch unit 81, and the light emitting unit 84 is disposed on the right side of the switch unit 82. The three light emitting units 85, 86, and 87 are arranged in a vertically aligned state between the switch unit 81 and the switch unit 82 and substantially at the center of the display unit 80.

  The switch unit 81 is disposed in a circular switch frame 81a. The characters “mode” are displayed in the switch frame 81a. When the switch unit 81 is pushed and operated, the circular light emitting unit 83 is turned on, and any one of the three light emitting units 85, 86, and 87 is turned on. When the light emitting unit 83 is turned on, it is notified that the operation mode of the tool main body 10 can be switched.

  On the right side of the three light emitting portions 85, 86, 87, characters “Tex”, “Assist”, and “Custom long press” are displayed in order from the top. When the switch unit 81 is pressed once, the light emitting unit 83 is turned on, and the light emitting unit 85 on which “Tex” is displayed is turned on. In the state where the light emitting unit 85 is lit, the operation mode of the tool body unit 10 is switched to the text mode. When the switch unit 81 is pressed again, the light emitting unit 85 is turned off and the light emitting unit 86 is turned on. In the state where the light emitting unit 86 is lit, the operation mode of the tool main body unit 10 is switched to the assist mode. When the switch unit 81 is pressed long, the circular light emitting unit 83 and the rectangular light emitting unit 87 are turned on. As a result, the operation mode of the tool body 10 is switched to the custom mode.

  The switch part 82 is disposed in a circular switch frame 82a. A character “striking” is displayed in the switch frame 82a. When the switch unit 82 is pressed and operated, the circular light emitting unit 84 is turned on, and one of the upper and lower two light emitting units 85 and 87 emits light among the three light emitting units 85, 86 and 87. Of the three light emitting units 85, 86, 87, “strong” is displayed on the left side of the upper light emitting unit 85, and “weak” is displayed on the left side of the lower light emitting unit 87.

  When the switch unit 82 is pressed, the light emitting unit 84 is turned on, and the light emitting unit 87 on which “weak” is displayed is turned on. When the switch unit 82 is pressed again, the upper light emitting unit 86 is turned on in addition to the light emitting unit 87. When the switch unit 82 is pressed again in a state where the two light emitting units 86 and 87 are lit, the light emitting unit 85 on which “strong” is displayed is also lit. In the state where only the light emitting portion 87 on which the character display of “weak” is turned on, the electric motor 20 is controlled to rotate at a low speed, and a weak striking force is output. In a state where the light emitting units 86 and 87 are lit, the electric motor 20 is controlled to the medium speed rotation, and a medium striking force is output. When the three light emitting portions 85, 86, 87 are lit, the electric motor 20 is controlled to rotate at high speed, and the striking force is increased.

  On the rear side of the switch unit 82 (lower side in FIG. 12), a character display of “Long press” is displayed. When the switch unit 82 on which the character display of “blow” is displayed is pressed for a long time, the illuminator 5 is turned on to illuminate the screw tightening site brightly, thereby enabling efficient work in a dark place. When the switch unit 82 is pressed and held again, the lighting fixture 5 is turned off. The switch unit 82 has a function as a lighting switch of the lighting tool in addition to the function of switching the striking force.

  The light-emitting portions 83 and 84 are surrounded by semicircular double-line frame portions 83a and 84a, respectively. Frame parts 83a and 84a are arranged symmetrically with each other. The left and right frame portions 83a and 84a make it possible to understand at a glance the relationship between the switch portion 81 and the light emitting portion 83 and the relationship between the switch portion 82 and the light emitting portion 84. In this respect, the operability of the display portion 80 is improved. Has been enhanced. Similarly, double guide lines 83b and 84b are drawn out from the frame portions 83a and 84a. Both guide lines 83b and 84b reach the upper portion of the upper light emitting portion 85 on which the characters “Tex” and “Strong” are displayed. A double guide line 81b is drawn out from the frame portion 81a of the switch portion 81 on which “mode” is displayed. In addition, a double guide line 82b is drawn out from the frame part 82a of the switch part 82 on which the characters “blow” are displayed. Both guide lines 81b and 82b reach the lower part of the lower light emitting portion 87 on which the characters “custom long press” and “weak” are displayed. An L-shaped double line guide line 81c is drawn from the lower part of the frame part 81a. This guide line 81c reaches the right side of the character display of “custom long press”. An L-shaped double-line guide line 82c is drawn from the lower part of the frame part 82a. This guide line 82c reaches the left side of the character display “Long press”. These guide lines 83b, 84b, 81b, 82b, 81c, and 82c make it possible to understand at a glance the relationship between the switch portions 81 and 82, the light emitting portions 85 to 87, and the character display. The operability of the display unit 80 is enhanced.

  As shown in FIG. 12, the display unit 80 according to the fifth embodiment is also arranged in a state where the front part is shifted forward with respect to the front end part of the control board 7. In the fifth embodiment, the light emitting units 83, 84, 85 and the character display of “Tex” and “Strong” are arranged in a region protruding from the front end portion of the control board 7. The light emitting units 83, 84, 85 are arranged at positions shifted forward with respect to the LEDs (not shown) mounted on the control board 7. The light emitting units 83, 84, and 85 emit light through a light guide unit (light guide unit 19a shown in FIG. 5) inclined forward. An LED mounted on the control board 7 is located directly under the light emitting units 86 and 87.

  Since the light emitting units 83, 84, 85 and the character display of “Tex” and “Strong” are arranged in a region protruding forward from the front end of the control board 7, the switch unit arranged on the display unit 80 correspondingly. And more characters can be arranged without impairing the operability and visibility. The remaining capacity display unit 88 may be omitted.

  FIG. 13 illustrates the display unit 90 of the sixth embodiment. The display unit 90 of the sixth embodiment is different from the display unit 80 of the fifth embodiment in the arrangement of the frame parts in order to further improve the operability of mode switching. The arrangement of the switch units 81 and 82, the arrangement of the light emitting units 83 to 87, and the arrangement of each character display are configured in the same manner as in the fifth embodiment. The remaining capacity display portion 88 of the battery pack 40 is configured in the same manner. The members and configurations that do not need to be changed are denoted by the same reference numerals and the description thereof is omitted.

  In the sixth embodiment, the switch unit 81 and the light emitting unit 83 on which “mode” is displayed are surrounded by a common frame 91. Further, the switch portion 82 and the light emitting portion 84 on which the characters “blow” are displayed are surrounded by a common frame portion 92. The right frame portion 91 and the left frame portion 92 are each indicated by a double line and are arranged symmetrically with respect to each other. Double line guide lines 91c and 92c extending in the horizontal direction are displayed from the left end of the right frame 91 and the right end of the left frame 92, respectively. Both guide lines 91c and 92c reach the upper portion of the upper light emitting portion 85 on which the characters “Tex” and “Strong” are displayed.

  An L-shaped double line guide line 91 a is drawn out from the lower part of the frame part 91. This guide line 91a reaches the right side of the character display portion of “custom long press”, like the guide line 81c. From the lower left portion of the frame portion 91, a double guide line 91b is drawn out in the same L shape. The guide line 91b extends between the character display of “Assist” and the character display of “Custom long press”.

  A double guide line 92b extends downward from the lower right portion of the left frame portion 92. The guide line 92b is bent in an L shape, and the leading end of the guide line 92b reaches the lower side of the lower light emitting portion 87 on which characters “custom long press” and “weak” are displayed. A short double guide line 92 a is drawn out from the lower part of the frame part 92. This guide line 92a is directed to the character display “Long press” displayed below. In the sixth embodiment, the character display of “write long press” is arranged on the rear side (lower side in FIG. 13) than the fifth embodiment.

  The display unit 90 of the sixth embodiment also has a front portion thereof, in which the light emitting portions 83, 84, 85 and the characters “tex” and “strong” are displayed forward from the front end of the control board 7. Are arranged. Thereby, it becomes possible to arrange more switch units and character displays arranged on the display unit 90 by that amount without impairing the operability and visibility. As in the fifth embodiment, the remaining capacity display unit 88 may be omitted.

  FIG. 18 shows the electric power tool 1 including the display unit 100 according to the seventh embodiment. The electric power tool 1 shows an impact driver as in the above embodiments. An electric motor 20, a planetary gear mechanism 30, and a rotary striking mechanism 32 are housed in the tool body 10. An output shaft 36 protrudes from the front end portion of the tool body 10. A tool holding portion 35 is provided at the protruding portion of the output shaft 36. In addition, about the structure which does not require a change, the description is abbreviate | omitted using a code | symbol of a peer.

  The grip portion 101 is provided so as to extend downward from the lower surface of the tool main body portion 10. As in the above embodiments, the display unit 100 is disposed on the front upper surface of the power supply unit 102 provided in the lower part of the grip unit 101. The power supply unit 102 has a flat plate shape that projects mainly from the lower part of the grip unit 101 to the front side. The power supply unit 102 according to the seventh embodiment is slightly smaller than the power supply unit 17 according to the first to sixth embodiments with respect to the forward projecting dimension and the left-right width dimension.

  Similarly, a slide-mounted battery pack 103 is attached to the lower surface of the miniaturized power supply unit 102. For the battery pack 103 attached to the power supply unit 102, a lithium ion battery having an outer dimension smaller than that of the battery pack 40 and an output voltage of 10.8V is used. Although not visible in FIG. 18, a remaining capacity display portion 103a for displaying its remaining capacity is provided on the rear surface of the 10.8V slide mounting type battery pack 103. The battery pack 103 can be removed from the power supply unit 102 by pushing down an unlock button 103b provided on the front surface and sliding the battery pack 103 to the previous image. Conversely, the battery pack 103 can be attached to the power supply unit 102 by sliding it backward.

  Details of the display unit 100 are shown in FIG. The display unit 100 of the seventh embodiment has a simplified display function. The display unit 100 includes a push button-type striking force changeover switch 105 in which the characters “blow” are displayed, a mode display unit 106 in which characters “Raku-Raku” are displayed, and a striking force display unit 108. ing. The striking force changeover switch 105 is disposed on the left side of the display unit 100, and the mode display unit 106 is disposed on the right side. A striking force display unit 108 is arranged in the center of the display unit 100 and between the striking force changeover switch 105 and the mode display unit 106. The striking force changeover switch 105, the mode display unit 106, and the striking force display unit 108 are arranged in a horizontal line in the left-right direction.

  The striking force display unit 108 includes two light emitting units 108a and 108b. Each of the two light emitting units 108a and 108b uses an LED as a light source. When the striking force changeover switch 105 is pressed, the striking force of the rotary striking mechanism 32 is switched from “strong” to “weak”. In a state where the striking force is set to “strong”, both the left and right light emitting units 108a and 108b are lit. When the striking force is switched to “weak”, the right light emitting unit 108b is turned off and only the left light emitting unit 108a is lit. The two light emitting units 108a and 108b are both lit red. A “weak” character is displayed on the front side of the left light emitting unit 108a, and a “strong” character is displayed on the front side of the right light emitting unit 108b. The right light-emitting portion 108b on which the “strong” character is displayed extends longer than the left light-emitting portion 108a on which the “weak” character is displayed. The front portions of both light emitting portions 108a and 108b are formed in a sharp shape that is inclined in the same direction.

  When only the left light emitting unit 108a is lit and the batting force is set to “weak”, when the batting force changeover switch 105 is pressed again, the left light emitting unit 108a is also turned off and the mode display unit 106 emits light. Part 109 is lit. When the light emitting unit 109 is turned on, the operation mode is switched from the batting mode to the “easy” mode. The “easy” mode is a specific operation mode set in advance for the operation state of the tool body 10. As described above, when the operation state of the tool body 10 is switched to the “easy” mode, as shown in FIG. 17, the electric motor 20 rotates at a low speed in the initial stage of screw tightening, and the screw tightening load exceeds a predetermined value (for example, When a certain number of hits are counted, the motor switches to high speed rotation. As described above, in the “easy” mode, the electric motor is automatically switched to the high speed rotation in accordance with the increase of the screw tightening load.

  The mode display unit 106 has a configuration in which “Easy” character display and one light emitting unit 109 are arranged inside a generally rectangular frame 106a. The light emitting unit 109 of the mode display unit 106 is lit in a color (for example, green) different from that of the light emitting units 108a and 108b for notifying the strength of the striking force. LEDs that emit red light are used as light sources in the light emitting units 108a and 108b, and LEDs that emit green light are used as light sources in the light emitting unit 109. As described above, each time the striking force changeover switch 105 is pressed, the operation mode is switched in the order of “strong” → “weak” → “easy”.

  The character display of “striking” of the striking force changeover switch 105 is surrounded by a circular frame portion 105a. A guide line 105b is drawn from the lower part of the frame part 105a. The guide line 105 b extends to the lower side of the impact force display unit 108. At the end of the guide line 105b, a character display “Long press and hold” is displayed. When the striking force changeover switch 105 is pressed and held for about 2 seconds, for example, the illuminator 5 is turned on and the convenience of screw tightening work in a dark place or the like is achieved. When the striking force changeover switch 105 is pressed and held once again in the lighting state, the lighting tool 5 is turned off. The striking force changeover switch 105 has a function as a lighting switch of the lighting tool 5 in addition to a function as a striking force changeover switch.

  According to the display unit 100 according to the seventh embodiment, the striking force changeover switch 105 that switches the striking force of the rotary striking mechanism 32, the striking force display unit 108 that displays the striking force, and the operating state of the rotary striking mechanism 32 are previously stored. Mode display portions 106 for displaying that the set operation mode (“easy” mode) is arranged in a horizontal row (horizontal arrangement). Thereby, the said display part 100 is comprised compactly in the front-back direction, and the display part 100 can be arrange | positioned to the power supply part 102 where the arrangement space of the front-back direction is narrower than the said 1st-6th embodiment.

  In addition, since the emission color (red) of the light emitting units 108a and 108b of the striking force display unit 108 and the emission color (green) of the light emitting unit 109 of the mode display unit 106 are different, the visibility of the display unit 100 is improved. While being able to increase, more information can be alert | reported in the compact display part 100. FIG. The light emitting units 108a, 108b, and 109 exemplified above have exemplified the configuration in which a single color LED is used as the light source. However, it is possible to further reduce the size by changing the light emission color for each notification content using one LED. In order to make the light emission colors of the light emitting parts different, in addition to making the light emission colors of the light sources different, it is also possible to apply different color films to the light sources of the same color to make the light emission colors different.

  Although the rotary impact tool (impact driver) is illustrated as the electric tool 1 having the various types of display units exemplified above, the display unit 19 (50, 60, 70) exemplified for other electric tools such as a drilling tool and a cutting tool. 100) can be applied.

  Moreover, although the rechargeable electric tool which uses the battery pack 40 as a power source is illustrated, for example, the present invention can be similarly applied to an AC power type electric tool which uses a commercial 100V as a power source.

1 ... Electric tool (impact driver)
2 ... Screw (for split case connection)
DESCRIPTION OF SYMBOLS 3 ... Hand strap 5 ... Illuminating tool (LED), 5a ... Transparent cover 6 ... Changeover switch 7 ... Control board, 7a ... Capacitor 8 ... Case 9 ... Controller S1, S2, S3 ... Switch part d1, d2, d3 ... Button switch e1-e9 ... LED (light emitting diode)
L1 to L9 ... light emitting part 10 ... tool main body part 11 ... main body case 12 ... rear case 12a ... bearing holding part 15 ... grip part 16 ... trigger 17 ... power supply part 18 ... main switch 19 ... display part (first embodiment), 19a ... light guide 20 ... electric motor 21 ... stator 22 ... rotor 23 ... sensor substrate 23a ... set screw 23b ... inner peripheral hole 24 ... motor shaft 25 ... bearing (front side)
26 ... Bearing (rear side)
27 ... Intermediate partition wall 28 ... Cooling fan 30 ... Planetary gear mechanism 31 ... Drive shaft 32 ... Rotary striking mechanism 32a ... Hammer, 32b ... Compression spring, 32c ... Steel ball 33 ... Anvil 34 ... Bearing 35 ... Tool holder 36 ... Output Shaft 40 ... Battery pack 50 ... Display unit (second embodiment)
50a ... light guide, 50b, 50c ... frame 60 ... display (third embodiment)
60a ... frame 70 ... display unit (fourth embodiment)
70a ... frame 80 ... display section (fifth embodiment)
90 ... display section (sixth embodiment)
100 ... display section (seventh embodiment)
101 ... Grip part 102 ... Power supply part 103 ... Battery pack (10.8V)
DESCRIPTION OF SYMBOLS 105 ... Battering force changeover switch, 105a ... Frame part, 105b ... Guide line 106 ... Mode display part, 106a ... Frame part 108 ... Blowing force display part 108a ... Light emission part, 108b ... Light emission part 109 ... Light emission part

Claims (12)

A tool main body part that is equipped with an electric motor as a drive source, a grip part that extends downward from the tool main body part and is gripped by a user, and a battery mounting part that is positioned at the lower end of the grip part and to which a battery pack is attached An electric tool having
The battery mounting unit is configured to determine a remaining capacity of power of the battery pack or to control an operation of the electric motor, and to display the remaining capacity of power of the battery pack or to be controlled by the controller. A display unit for displaying an operation state, the controller and the display unit each have a flat plate shape, and are arranged so as to face each other;
The controller includes one end edge located outward from the lower end of the grip portion and a plurality of LEDs arranged in parallel along the one end edge in the vicinity of the one end edge;
The display portion has a protrusion that protrudes outward from the one end edge of the controller and is positioned outward from the LED in a top view, and a character display related to light emission of the LED is displayed on the protrusion. Electric tool provided. The electric tool according to claim 1,
The display unit is provided with a mode switch for switching modes, the controller is equipped with a button switch corresponding to the display unit, and the button switch is operated by pressing the mode switch,
The electric tool in which the character display provided on the projecting portion of the display portion is a character notation related to the mode switch.   The electric tool according to claim 1 or 2, wherein the display unit and the controller are assembled to the battery mounting unit as separate components.   The electric tool according to any one of claims 1 to 3, wherein the display unit includes one illumination switch and two mode changeover switches.   The electric tool according to any one of claims 1 to 4, wherein the battery pack is a rechargeable battery pack, and the display unit has a light emitting unit that displays a remaining capacity of the battery pack. .   The electric tool according to any one of claims 1 to 5, wherein the display unit includes two rows of light emitting unit rows arranged in the front and rear in which a plurality of light emitting units are arranged side by side.   The electric power tool according to any one of claims 1 to 6, wherein a plurality of light emitting units having different display contents are arranged side by side on the left and right sides on the display unit. An electric motor;
A tip tool holding portion disposed on the front side of the electric motor and driven by the electric motor;
A tool body for housing the electric motor;
A grip that extends downward from the tool body and is gripped by a user;
An enlarged diameter portion disposed below the grip portion;
A controller housed in the enlarged diameter portion;
It has a display part provided on the upper surface of the enlarged diameter part,
The controller has a plurality of LEDs disposed along the front edge in the vicinity of the front edge, and the LEDs are configured to emit light,
The display unit includes a light emitting unit that emits light from the LED, and a projecting portion that projects forward from the front edge of the controller and is located in front of the light emitting unit in a top view. A power tool provided with a character display related to light emission of the LED. An electric motor;
A tip tool holding portion disposed on the front side of the electric motor and driven by the electric motor;
A tool body for housing the electric motor;
A grip that extends downward from the tool body and is gripped by a user;
An enlarged diameter portion disposed below the grip portion,
A control board on which LEDs are mounted on the enlarged diameter portion is accommodated, the LEDs are disposed in the vicinity of one end edge of the control board, and a button switch is mounted on the control board,
A light guide for guiding light from the LED;
A display unit including a light emitting unit that emits light of the LED guided by the light guide unit is provided on the upper surface of the enlarged diameter unit,
The control board and the display unit are juxtaposed in the vertical direction,
In the display unit, a mode switch corresponding to the button switch is arranged, and the mode is switched by operating the button switch by pressing the mode switch.
The display portion has a protrusion that protrudes outward from the one end edge of the control board in a top view and is positioned outward of the LED, and a character display related to the mode switch is displayed on the protrusion. Electric tool provided. An electric tool having a tool main body portion that includes an electric motor as a drive source, a grip portion that extends downward from the tool main body portion and is gripped by a user, and a power source portion at the tip of the grip portion,
The power supply unit includes a display unit that displays an operation state of the tool main body unit, and a controller that controls the number of rotations of the electric motor and is arranged in parallel below the display unit,
The controller has a plurality of LEDs arranged along the one end edge in the vicinity of the one end edge;
The display portion has a protrusion that protrudes outward from the one end edge of the controller and is positioned outward of the LED in a top view, and a character display related to light emission of the LED is provided on the protrusion. And
A plurality of light emitting units that receive the light from the LEDs and emit the light, the display unit, the first light emitting unit row arranged in a horizontal row on the left and right, and located behind the first light emitting unit row; An electric tool including a second light emitting unit row in which a plurality of light emitting units that receive light from other LEDs provided in the controller and emit the light are arranged in a horizontal row on the left and right. A brushless motor,
A tool main body part equipped with a rotary impact mechanism that gives impact force in the screw tightening direction using the brushless motor as a drive source;
A grip that extends downward from the tool body and is gripped by a user;
A battery mounting portion disposed below the grip portion and mounted with a battery pack;
The battery mounting part is provided with a control board on which LEDs are arranged,
On the upper surface of the battery mounting portion is a power tool provided with a flat plate-shaped display portion,
The display unit includes a light guide unit that guides light of the LED, and a character display related to light emission of the LED,
The control board extends in the front-rear direction and the LED is disposed in the vicinity of a front edge of the control board, and a button switch is mounted on the control board,
The display unit extends in the front-rear direction, and the display unit is provided with a mode switch corresponding to the button switch, and the button switch is operated by pressing the mode switch,
The light guide overlaps the control board in a top view,
The display unit has a protrusion that protrudes forward from the front edge of the control board and is positioned in front of the LED in a top view,
At least a part of the character display is an electric tool provided on the protruding portion of the display unit. An electric motor;
A tip tool holding portion disposed on the front side of the electric motor and driven by the electric motor;
A tool body for housing the electric motor;
A grip that extends downward from the tool body and is gripped by a user;
An enlarged diameter portion disposed below the grip portion;
A controller accommodated in the enlarged diameter portion and having an LED disposed on the front edge;
A display unit provided on a top surface of the enlarged-diameter unit and provided with a light-emitting unit that emits light from the LED;
The controller is equipped with a button switch for switching modes,
In the display unit, a mode change switch corresponding to the button switch is arranged, and the button switch is operated by pressing the mode change switch,
The electric power tool, wherein the display unit has a protruding part protruding forward from the front edge of the controller in a top view, and a character display related to the light emitting part is provided on the protruding part.

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