JP2014148001A - Power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power tool capable of performing switching of a drive condition by one hand gripping the power tool, and capable of avoiding switching of the power tool to another drive condition unintentionally during work.SOLUTION: A motion sensor 23 (for example, an acceleration sensor) is provided at a power tool 10. When gripping the power tool 10 and performing a hand operation in one out of six directions, front/back, left/right and up/down, the hand operation (motion) is detected by the motion sensor 23. A control unit performs one operation corresponding to the motion detected by the motion sensor 23 out of: switching of a rotational speed (that is, switching of a gear ratio) of a chuck part 17 on which a tip tool 16 is mounted; switching of a rotational direction of the chuck part 17; and an ON/OFF switching of an illumination part 21.

Description

  The present invention relates to an electric tool that rotates a tip tool with the power of a power source.

  An electric tool such as an electric screwdriver is known as an example of this type of electric tool. The electric tool includes a speed change mechanism that shifts a rotation output from a motor (power source) provided in the main body housing, an output shaft that transmits the rotation changed at a predetermined speed ratio by the speed change mechanism to the tip tool, A shift switching operation unit operated to switch the gear ratio in the transmission mechanism unit (for example, Patent Documents 1 to 4).

  For example, in the electric tools disclosed in Patent Documents 1 and 2, a signal when the shift switching operation unit is operated is input to the control circuit unit, and the control circuit unit drives the actuator to switch the gear ratio of the transmission mechanism unit. An electric transmission is provided.

  Some electric tools automatically change the speed ratio of the power transmission unit according to the work load by controlling the actuator by the control unit (see, for example, Patent Documents 3 and 4).

JP 2009-56590 A JP-A-9-57639 JP 2012-16760 A JP 2012-30347 A

  By the way, when shifting the power tool by manual operation, it is necessary to operate the shift switching operation unit using the hand opposite to the hand holding the power tool. In addition, not only gear change operation, but also when switching the rotation direction, when switching other modes other than gear shift, when switching on / off of auxiliary equipment (illumination part as an example) installed in the power tool, etc. When operation was necessary, it was necessary to use both hands. However, it is troublesome to perform the switching operation using both hands one by one, and in some cases, the work is interrupted because both hands are used, and the work efficiency may be reduced. Also, with this type of electric power tool, it is necessary to avoid unintentional switching of driving conditions due to vibrations generated during work and manual operations required for work.

  Of course, the above-mentioned problem is not limited to a power tool whose power source is an electric type, for example, an electric tool having a pneumatic power source driven by pneumatic pressure, or a hydraulic type driven by hydraulic pressure The same applies to power tools equipped with a power source.

  The present invention has been made in order to solve the above-mentioned problems, and the purpose of the present invention is to enable switching of driving conditions with one hand holding the electric tool, and for the electric tool to be unintentionally used during the work. An object of the present invention is to provide an electric tool that can avoid switching to the driving conditions.

  In order to achieve the above object, an electric tool is an electric tool including a power source that supplies power to a rotation output unit to which a tip tool is mounted, and an operation unit that instructs the operation of the power source, and a housing A motion sensor capable of detecting motion due to the hand movement of the operator holding the hand, and when the hand motion is detected by the motion sensor when the operation unit is not operated, and the detected hand And a control unit that changes to a predetermined driving condition associated with the predetermined manual motion when the motion matches a predetermined manual motion.

Moreover, in the said electric tool, it is preferable that the said control part performs control based on the signal of the motion sensor input during the predetermined time after the said operation part was turned off.
In the power tool, it is preferable that the control unit performs control based on a motion sensor signal input during a predetermined time after the operation unit is repeatedly turned on and off a predetermined number of times.

  The power tool preferably further includes a forward / reverse selector switch, and the control unit performs control based on a motion sensor signal input when the forward / reverse selector switch is neutral.

  The electric power tool may further include a transmission unit that shifts the power of the power source and transmits the power to the rotation output unit and is switched to a plurality of transmission gear ratios by the control unit. The control unit increases the transmission ratio of the transmission unit when an operation in one direction is detected by the motion sensor, while the operation of the reverse direction is detected. It is preferable to reduce the transmission ratio of the transmission unit.

  In the power tool, the predetermined driving condition is a rotation direction of the rotation output unit, and the control unit rotates the rotation output unit in the same direction as the rotation direction detected by the motion sensor. Is preferably switched.

Moreover, in the said electric tool, it is preferable that the said control part changes a torque value with the motion detected by the said motion sensor.
The power tool may further include an illumination unit that illuminates at least one of the tip tool and the periphery of the tip tool, and the predetermined driving condition is at least one of on / off of the illumination unit and illumination intensity. And it is preferable that the said control part changes at least one among ON / OFF of the said illumination part, and illumination intensity, when the operation | movement of one direction is detected by the said motion sensor.

  The power tool may further include a multi-impact switching unit that switches between an impact mode and a drill mode, and the predetermined driving condition is switching between the impact mode and the drill mode, and the control unit includes the motion sensor When the motion in one direction is detected, the impact mode is set. On the other hand, when the motion in the reverse direction is detected, the drill mode is preferably set.

Furthermore, it is preferable that the electric power tool further includes a notification unit that notifies a correspondence relationship between the predetermined manual action and the driving condition.
Moreover, it is preferable that the electric power tool further includes a setting unit configured to perform setting for assigning the driving condition to a motion defined by the predetermined manual operation.

  In the power tool, a battery unit capable of supplying power to the power source is attached to a position opposite to the power source with respect to a grip portion gripped by an operator in the casing, and the motion The sensor is preferably arranged at a position closer to the battery part than the grip part in the housing.

  According to the present invention, the driving condition can be switched with one hand holding the electric tool, and the electric tool can be prevented from being switched to another driving condition unintentionally during the work.

The perspective view which shows the electric tool in 1st Embodiment. The schematic block diagram of an electric tool. The schematic block diagram of the principal part of an electric tool. The front view which shows the mechanism which concerns on the transmission of a power transmission part. The timing chart which shows an example start operation and a sensor input permission period. The timing chart which shows the start operation and sensor input permission period of the other example different from FIG. The table which shows the reference data which show the correspondence of a motion detection direction and drive conditions. The perspective view which shows the relationship between the motion of an electric tool, and drive conditions. The flowchart explaining motion switching control. The schematic block diagram which shows the principal part of the multi-type electric tool which has an impact function in 2nd Embodiment. The table which shows the reference data which show the correspondence of a motion detection direction and drive conditions.

(First embodiment)
Hereinafter, the first embodiment will be described with reference to FIGS.
As shown in FIG. 1, the electric power tool 10 of the present embodiment is a hand-held type that can be held with one hand, and is used, for example, as an electric drill driver. The electric tool 10 includes an electric tool main body 11 and a battery pack 12 (an example of a battery unit) that can be attached to and detached from the electric tool main body 11. The battery pack 12 incorporates a secondary battery composed of a plurality of battery cells as an example.

  A main body housing 13 (an example of a housing) that forms an exterior of the electric power tool main body 11 includes a bottomed cylindrical body portion 14 and a direction that intersects the axis of the body portion 14 in the longitudinal direction (downward in FIG. 1). It is comprised with the holding | grip part 15 extended and formed. Further, the electric power tool 10 has a square plate-like battery pack mounting portion 15a at the lower end of the grip portion 15, and the battery pack 12 is mounted on the battery pack mounting portion 15a. A chuck portion 17 as an example of a rotation output portion to which the tip tool 16 can be detachably attached is attached to the distal end portion of the body portion 14 in a state in which the shaft can freely rotate. In the present embodiment, the longitudinal direction of the body portion 14 is defined as the front-rear direction, the direction perpendicular to the front-rear direction in the substantially extending direction of the grip portion 15 is defined as the up-down direction, and the direction orthogonal to the front-rear direction and the up-down direction To do.

  As shown in FIG. 1, on the upper surface of the body portion 14, a speed change switch 18 (speed change) for switching whether to change the speed ratio for determining the rotational speed of the chuck portion 17 to a desired one or to perform automatic speed change. An example of a switching operation unit) is provided. The speed change switch 18 is, for example, a slide switch. By sliding the position in the front-rear direction, for example, high speed low torque drive (H gear), low speed high torque drive (L gear), and automatic speed change (AUTO) One of the three drive modes can be selected.

  Further, as shown in FIG. 1, a forward / reverse selector switch 19 (rotational direction selector switch) for switching the rotation direction of the chuck portion 17 between forward rotation and reverse rotation is provided in the vicinity of the connection portion between the body portion 14 and the grip portion 15. ) Is provided. The forward / reverse selector switch 19 includes, for example, three positions: a forward rotation position when the chuck portion 17 is rotated forward, a reverse rotation position when the chuck portion 17 is reversed, and a neutral position when the chuck portion 17 is not rotated forward and reverse. The state can be switched. In addition, the trigger lever 20a protrudes forward from the grip portion 15 in a state of being biased by, for example, a spring.

  Moreover, the illumination part 21 is provided in the upper surface of the battery pack mounting part 15a. The lighting unit 21 is alternately turned on (turned on) and turned off (off) every time the lighting operation switch 22 (on / off switch) provided adjacent thereto is operated. The illuminating unit 21 is attached at a predetermined posture angle so that the tip end of the chuck portion 17 or the work area of the tip tool 16 can be an irradiation area. The illumination unit 21 may be attached to the body unit 14 or the grip unit 15 as long as the irradiation area does not become a shadow of a part of the electric tool 10 or a user's hand gripping the grip unit 15.

  If the user performs a manual operation of moving the electric tool 10 in a predetermined direction without operating the gear change switch 18, the forward / reverse switch 19 and the operation switch 22, It has a motion switching function for switching to a driving condition associated in advance with the motion detection direction based on the signal that has detected the motion. That is, with this motion switching function, the user holding the power tool 10 manually moves the rotation speed (torque value) of the chuck portion 17, the rotation direction, and turns on / off the illumination portion 21. It is possible to switch to a driving condition associated with a direction in advance. In order to realize this motion switching control, the electric power tool 10 is provided with a motion sensor 23 that can detect a manual action (motion) that the user holds and moves the electric power tool 10 in a predetermined direction.

  As shown in FIG. 1, the motion sensor 23 of this embodiment is installed in the battery pack mounting part 15a as an example. That is, the motion sensor 23 is disposed at a position that is below (on the battery pack 12 side) than the position where the user grips the grip portion 15 during work. Here, when the user performs a manual operation of gripping the grip portion 15 and moving the power tool 10 in a predetermined direction, the power tool 10 is shaken by the weight of the battery pack 12, and the power tool 10 swings back and forth or right and left around the gripped position. Move. At this time, since the motion sensor 23 can move more easily than the displacement amount of the hand, the hand movement can be detected with higher sensitivity. For this reason, the motion sensor 23 is disposed below the position where the user holds the grip portion 15. Of course, you may arrange | position the motion sensor 23 in the trunk | drum 14 or the holding part 15 (inside the site | part grasped with a hand).

  As shown in FIG. 2, in the electric tool main body 11, a motor 25 that is driven by electric power from the battery pack 12, a power transmission unit 26 that shifts and outputs the rotation of the motor 25, and a speed change of the power transmission unit 26. A speed change actuator 27 that switches the ratio and a control unit 28 that performs overall control of the electric power tool 10 are provided. In addition, the power tool main body 11 is provided with a light emitting unit 21 a and a notification unit 29 that constitute the illumination unit 21. The light emitting unit 21a is made of, for example, LED light. The notification unit 29 includes, for example, at least one of a liquid crystal display (LCD), an LED, and a speaker, and is driven when notifying the user of the correspondence between the manual operation and the driving condition.

  As shown in FIG. 2, input system components such as a forward / reverse selector switch 19, a trigger switch 20, and a motion sensor 23 are electrically connected to the control unit 28. In addition, a current detection unit 30 that detects a current to the motor 25 and a rotation detection unit 31 that detects the rotation speed of the motor 25 are electrically connected to the control unit 28. The trigger switch 20 includes a trigger lever 20a shown in FIG. 1 that is a part operated by a user, and a switch (not shown) that is turned on and off in accordance with the operation of the trigger lever 20a. The trigger switch 20 outputs a signal having a value corresponding to the operation amount of the trigger lever 20a under the ON state. Although omitted in FIG. 2, in this embodiment, the gear change switch 18 and the operation switch 22 (both refer to FIG. 1) are also connected to the control unit 28. However, the gear change switch 18 and the operation switch 22 may be eliminated because they can be replaced by motion switching control.

  As shown in FIG. 2, output system components such as a switching drive circuit 32, a shift drive circuit 33, a light emission drive circuit 34, and a drive circuit 35 are connected to the control unit 28. Each drive circuit 32 to 35 is supplied with electric power of a predetermined voltage from the battery pack 12. The power tool main body 11 is provided with a communication unit 36. The communication unit 36 is electrically connected to the control unit 28, and the control unit 28 receives setting information for setting a correspondence relationship between a manual action (motion) and a driving condition through communication with the outside of the electric power tool 10. Used to do. The communication unit 36 employs, for example, a wired communication method or a wireless communication method. In the case of a wired communication system, for example, a USB terminal (USB port) can be adopted. In the case of a wireless communication system, for example, a short-range wireless communication unit (for example, Bluetooth (registered trademark), infrared communication unit, etc.) can be employed.

  As shown in FIG. 2, a power transmission unit 26 is connected to the rotation shaft 25 a of the motor 25. The power transmission unit 26 has a function of decelerating and transmitting the input rotation from the motor 25 to the output shaft 37. A chuck portion 17 is coupled to an output shaft 37 that outputs rotation decelerated by the power transmission portion 26 so as to be integrally rotatable. For this reason, the tip tool 16 mounted on the chuck portion 17 rotates at the same speed as the output shaft 37. The rotation detection unit 31 includes a magnet 38 that is fixed to the rotation shaft 25 a so as to be integrally rotatable and has a plurality of magnetic poles, and a Hall element 39 that is disposed to face the magnet 38, and corresponds to the rotation speed of the motor 25. A detection signal is output to the control unit 28.

  Based on the input signal from the trigger switch 20, the control unit 28 starts and stops the motor 25 via the switching drive circuit 32, and adjusts the rotational speed during operation. While the trigger switch 20 is being operated, the control unit 28 controls the speed of the motor 25 at a rotational speed corresponding to the operation amount (the pulling amount of the trigger lever 20a).

  Further, the control unit 28 controls the power transmission unit 26 to switch to the designated speed ratio by driving the speed change actuator 27 to the drive position corresponding to the designated speed ratio via the speed change drive circuit 33. The control unit 28 controls the rotation direction of the speed change actuator 27 and the drive power supplied by the PWM control based on the control signal output to the speed change drive circuit 33. Further, the control unit 28 performs control for switching on / off of the light emitting unit 21 a (that is, the illumination unit 21) via the light emission driving circuit 34.

  The control unit 28 includes a setting unit 28a. In the setting unit 28a, setting information indicating a correspondence relationship between a manual action (motion) and a driving condition, which is received by the control unit 28 through communication with the outside of the electric power tool 10, is set. In addition, the control unit 28 drives the notification unit 29 via the drive circuit 35 to notify the setting information set in the setting unit 28a by at least one notification method of liquid crystal display, LED display, and sound. To do.

  The control unit 28 detects the load torque applied to the output shaft 37 (tip tool 16) based on the drive current detected by the current detection unit 30 and the gear ratio of the power transmission unit 26 at the time of detection. In the automatic shift mode, the control unit 28 controls the shift ratio of the power transmission unit 26 by driving the shift actuator 27 based on the detected load torque. The control unit 28 stops the motor 25 when it detects the lock of the motor 25 based on the detected load torque and when it detects the lock of the motor 25 based on the detection signal from the rotation detection unit 31. I do.

Next, a detailed configuration for switching the gear ratio of the power transmission unit 26 will be described with reference to FIGS. 3 and 4.
As shown in FIGS. 3 and 4, the power transmission unit 26 includes a transmission mechanism unit 41 and a transmission switching unit 42 for switching the transmission ratio of the transmission mechanism unit 41. The transmission mechanism 41 includes a cylindrical gear case 43 and a transmission gear mechanism 44 housed in the gear case 43. The transmission gear mechanism 44 includes, for example, two reduction gears (H gear, L gear) (not shown), and a ring gear RG having internal teeth that can mesh with the external teeth of the two reduction gears. By moving the RG in the axial direction (left and right in FIG. 3) of the output shaft 37 (see FIG. 3) and engaging with one of the reduction gears, the reduction ratio can be changed in two stages. In addition, the transmission gear mechanism 44 of this embodiment consists of a planetary gear mechanism, for example.

  As shown in FIGS. 3 and 4, a semi-cylindrical (arc-shaped) cam member 45 partially lacking on the upper side is rotatable on the outer peripheral side of the ring gear RG about the axis of the ring gear RG ( It is arranged in a swingable state. The cam member 45 includes a cam main body portion 46 having a semi-cylindrical shape along the outer surface of the ring gear RG, and an engagement portion projecting radially outward from the cam main body portion 46 (lower side in FIGS. 3 and 4). 47.

  3 is driven to change the gear ratio by moving the ring gear RG in the axial direction. The speed change actuator 27 is rotated by a speed change motor 27a that can rotate in both forward and reverse directions, a speed reduction portion 27b that transmits the drive power of the speed change motor 27a by decelerating, and a drive force that is transmitted via the speed reduction portion 27b. Output gear 27c.

  As shown in FIG. 4, the output gear 27 c meshes with the tooth portion 47 a of the engaging portion 47. For this reason, when the speed change actuator 27 is driven forward / reversely, the cam member 45 is reciprocally rotated within a predetermined rotation range via the engagement of the output gear 27 c and the engaging portion 47.

  As shown in FIGS. 3 and 4, a pair of cam holes 48 are formed in the portion of the cam body 46 near the both ends in the circumferential direction. As shown in FIG. 3, the cam hole 48 has a working hole 48a extending along a direction inclined with respect to the axial direction and the circumferential direction of the ring gear RG, and is continuously drilled at both ends of the working hole 48a. And a holding hole 48b extending along the circumferential direction.

  As shown in FIG. 4, a groove portion RGa extending along the circumferential direction is formed on the outer circumferential surface of the ring gear RG accommodated in the gear case 43 so as to be movable in the axial direction. A support member 49 made of an arc-shaped metal wire is engaged with the groove RGa. The support member 49 includes a support portion 49a having a semicircular arc shape when viewed from the front shown in FIG. 4 along the outer peripheral surface of the ring gear RG, and a pair of protrusions 49b extending linearly outward from both ends of the support portion 49a in the radial direction. And have. The pair of protrusions 49b is inserted from the inside into a pair of through holes 43a that are formed in the gear case 43 so as to extend in the shape of a long hole extending along the axial direction of the gear case 43, and then is paired with the cam member 45. The cam hole 48 is inserted.

  The speed change actuator 27 rotates the cam member 45 to change the position of the ring gear RG in the axial direction and switch the speed ratio of the speed change gear mechanism 44. The speed change actuator 27 includes a position detector 27d that can detect that the ring gear RG has been changed to the correct target position from the rotation amount of the output gear 27c. The control unit 28 drives the speed change actuator 27 until the ring gear RG is changed to the target position based on the detection signal of the position detection unit 27d.

  In the present embodiment, the ring gear RG engages with the H gear at the first engagement position on the relatively rear side indicated by a broken line in FIG. When the ring gear RG is in the first engagement position, the power transmission unit 26 is switched to the gear ratio in the high speed low torque mode (hereinafter also simply referred to as “high speed mode”). Further, the ring gear RG moves forward from the first engagement position, so that the engagement state with the H gear is released. Further, the ring gear RG engages with the L gear when it moves to the second front engagement position indicated by a two-dot chain line in FIG. When the ring gear RG is in the second engagement position, the power transmission unit 26 is switched to the speed ratio in the low speed high torque mode (hereinafter also simply referred to as “low speed mode”).

  Returning to FIG. 2, the motion sensor 23 of the present embodiment is configured by a triaxial acceleration sensor as an example. Of course, the motion sensor 23 may be a gyro sensor capable of detecting an angular velocity. In addition, it can also change into the well-known sensor which can detect a manual operation (motion) when a user moves the electric tool 10 in a predetermined direction.

  The motion sensor 23 according to the present embodiment outputs three types of acceleration signals obtained by detecting accelerations in three directions (X axis, Y axis, and Z axis). Therefore, an X direction acceleration detection signal, a Y direction acceleration detection signal, and a Z direction acceleration detection signal representing accelerations in the X, Y, and Z directions are input from the motion sensor 23 to the control unit 28.

  The control unit 28 calculates the direction and magnitude of acceleration acting on the power tool 10 based on the X, Y, and Z acceleration detection signals, and determines the direction of the user's manual motion (motion) based on the calculation result. To detect. The motion sensor 23 may be configured as a sensor unit including a calculation function unit, and an acceleration detection signal indicating the direction and magnitude of acceleration acting on the power tool 10 may be output to the control unit 28.

  The control unit 28 illustrated in FIG. 2 includes, for example, a CPU and a memory that stores a program (both not shown). In the memory, a motion switching control program shown in the flowchart of FIG. 9 as one of the programs, and the reference data D (setting information) shown in FIG. 7 that is referred to by the control unit 28 (specifically, the CPU) when the program is executed. An example) is stored.

  Here, the motion switching control means that the user moves the electric tool 10 manually with the motion sensor 23, and the control unit 28 selects the drive target corresponding to the detected motion direction as the detected motion direction. Is a control for switching the driving condition of the electric power tool 10 by driving the driving tool so as to satisfy the driving condition corresponding to. In the present embodiment, the gear ratio of the power transmission unit 26 is switched, the rotation direction of the motor 25 is switched, and illumination is performed by manual movements (motions) in the six directions of front / rear, left / right, and up / down of the power tool 10. The unit 21 is switched on / off.

  In the present embodiment, the front-rear direction, the left-right direction, and the up-down direction of the power tool 10 correspond to the X-axis direction, the Y-axis direction, and the Z-direction of the motion sensor 23, respectively. The correspondence relationship between the motion detection direction and the drive condition (switching control content) is set as reference data D (setting information) shown in FIG.

  That is, as shown in FIG. 7, switching on / off of the illumination unit 21 (light emitting unit 21 a) is assigned to the motion detection direction “X-axis direction (front-rear direction)”. As driving conditions, “lighting” is set in the X direction (forward direction), and “lights off” is set in the −X direction (rear direction). Further, forward / reverse switching of the motor 25 is assigned to the motion detection direction “Y-axis direction (left-right direction)”. As drive conditions, “forward rotation” in the Y direction (right direction) and “reverse rotation” in the −Y direction (left direction) are set. Further, switching of the gear ratio (that is, drive mode) of the power transmission unit 26 by the gear shift actuator 27 is assigned to the motion detection direction “Z-axis direction (vertical direction)”. As drive conditions, a high speed gear ratio (high speed mode) is set in the Z direction (upward), and a low speed gear ratio (low speed mode) is set in the -Z direction (downward).

  For this reason, as shown in FIG. 8, the illumination unit 21 can be turned on by a manual operation in the forward direction of the electric tool 10, and the illumination unit 21 can be turned off by a manual operation in the backward direction of the electric tool 10. In addition, the chuck portion 17 can be rotated forward by a manual operation of the electric tool 10 in the right direction, and the chuck portion 17 can be reversed by a manual operation of the electric tool 10 in the left direction. Further, it is possible to switch to the high speed mode by an upward movement of the electric tool 10 and to switch to the low speed mode by a downward movement of the electric tool 10. FIG. 8 shows an example of the electric tool 10 that does not include the shift changeover switch 18.

  The electric tool 10 has a customization function that allows the user to customize the correspondence between the motion detection direction and the driving conditions. For this reason, in the present embodiment, the correspondence between the motion detection direction and the driving condition shown in FIGS. 7 and 8 in the electric tool 10 can be changed from the default setting to a desired content by using the customization function. ing.

  When the customization function is used, the power tool 10 is connected to a personal computer or a portable information terminal (both not shown) via the communication unit 36 in a wired or wireless manner. In addition, when the user downloads the setting software to the personal computer in advance and starts the setting software, the customized setting that can assign a desired driving condition to the motion detection direction prepared in advance on the monitor A screen is displayed. On this setting screen, the user selects and inputs a predetermined driving condition to be assigned to the motion detection direction by operating an input device such as a mouse. Thereafter, when the user performs a setting execution operation with the input device, the set reference data D is transmitted from the personal computer to the power tool 10 by wired or wireless communication.

  When the control unit 28 shown in FIG. 2 receives the reference data D from the personal computer, the setting unit 28a writes the reference data D in the memory. In other words, the setting unit 28a has a function of performing a setting in which the user assigns a desired driving condition to a preset motion direction. Thereafter, the CPU in the control unit 28 executes motion switching control with reference to the reference data D read from the memory of the setting unit 28a. Thus, the control unit 28 executes the motion switching control according to the correspondence relationship between the motion detection direction customized by the user and the driving conditions.

  When the control unit 28 shown in FIG. 2 receives an instruction operation for confirming the setting information by the user, the control unit 28 associates the motion detection direction with the driving condition based on the reference data D stored in the memory of the setting unit 28a. Setting information indicating the relationship is notified to the user by the notification unit 29. The notification unit 29 has at least one of a liquid crystal display device (LCD), an LED, and a speaker. In the case of a liquid crystal display device, the control unit 28 displays all the correspondences between the motion detection direction and the driving conditions on the display screen. Display one at a time or part at a time. Further, in the case of LEDs, three types of LEDs corresponding to the X, Y, and Z directions are provided, and the control unit 28 determines the lighting color or lighting mode (for example, lighting / flashing speed) of the LED, or various three types. The correspondence between the motion detection direction and the driving condition is notified by the lighting positions of the LEDs provided individually. Further, in the case of a speaker, the control unit 28 notifies the correspondence between the motion detection direction and the driving condition by voice from the speaker.

  In addition, instead of dividing the motion detection direction into the + direction and the − direction, the drive condition corresponding to the predetermined direction is alternately switched to the opposite side every time the motion detection direction is moved in the predetermined direction (X, Y, Z direction). Good. For example, every time the electric power tool 10 is moved in the front-rear direction (X direction), the lighting unit 21 is turned on / off alternately. Moreover, every time the electric tool 10 is moved in the left-right direction (Y direction), the forward rotation / reverse rotation of the motor 25 is alternately switched. Furthermore, every time the electric power tool 10 is moved in the vertical direction (Z direction), the power transmission unit 26 is alternately switched to a high speed / low speed gear ratio. Of course, the function for which three or more driving conditions are prepared may be configured such that each time the electric power tool 10 is moved in a predetermined direction, the driving condition is switched one by one to the driving condition corresponding to the predetermined direction. For example, when high speed / low speed / AUTO is prepared, the high speed / low speed / AUTO is switched in turn each time the electric tool 10 is manually operated in a predetermined direction previously associated with a shift.

  Here, when a configuration is adopted in which a manual operation (motion) is detected during operation (operation) by the electric tool 10 and the corresponding driving condition is switched, the user performs a manual operation necessary for the operation of the electric tool. In addition, the hand movement may be detected as a motion and unintentionally switched to another driving condition. Therefore, in this embodiment, a specific operation intentionally performed by the user is set as a start operation so that only a manual action (motion) intentionally performed by the user is detected, and a predetermined time has elapsed since the start operation. Only the manual operation performed under the operation stop state of the power tool 10 within the set period until the operation is performed is set as a detection target.

  Specifically, in the present embodiment, a period during which input from the motion sensor 23 is permitted (hereinafter referred to as “sensor input permission period”) is a predetermined time T from the detection time of the start operation when the operation of the trigger lever 20a is stopped. Only set between. Here, the operation content of the start operation can be changed as appropriate, and in the present embodiment, one of the start operation shown in FIG. 5 and the start operation shown in FIG. 6 is adopted as an example.

  In the example shown in FIG. 5, the trigger switch 20 is turned off as a start operation, the sensor input permission period is set for a predetermined time T from the start operation, and the control unit 28 outputs a signal from the motion sensor 23 only during the sensor input permission period. The power tool 10 is controlled based on the above. By permitting motion detection by the motion sensor 23 only when the trigger switch 20 is off, it is possible to avoid a situation in which shaking such as vibration generated in the electric tool being worked is erroneously detected as motion. Further, by limiting the time during which the input of the motion sensor 23 is permitted, it is possible to prevent the driving conditions of the electric tool 10 from being inadvertently switched.

  Further, the motion sensor input permission signal shown in FIG. 5 is generated by a signal generation circuit (not shown) in the control unit 28 and input to the CPU. When the CPU detects the start operation, the CPU outputs a signal to that effect to the signal generation circuit, whereby the motion sensor input permission signal is switched from the prohibited state (Low level) to the permitted state (High level). The control unit 28 is provided with a time counter that manages the output time of the signal generation circuit in the permitted state. This time counter receives a motion sensor input permission signal, and starts time counting (counting) when there is a level change (rising edge in the example of FIG. 5) when a start operation is detected. When the time counter finishes counting the predetermined time T, the signal generation circuit outputs a signal to that effect to the signal generation circuit, so that the signal generation circuit changes the motion sensor input permission signal from the permitted state (High level) to the prohibited state (Low level). ). The CPU only validates the signal from the motion sensor 23 input during the sensor input permission period in which the motion sensor input permission signal is in the permitted state.

  Further, in the example shown in FIG. 6, repeating the on / off of the trigger switch 20 a plurality of times is a start operation, and a predetermined time T from the start operation is a sensor input permission period. The control unit 28 controls the electric tool 10 based on the signal from the motion sensor 23 only during the sensor input permission period when the level of the motion sensor input permission signal is in the permission state. Also in this case, since the detection of motion by the motion sensor 23 is permitted only when the trigger switch 20 is OFF, it is possible to avoid erroneous detection using motion such as vibration generated in the electric tool during work as motion. Further, by limiting the time during which the input of the motion sensor 23 is permitted, it is possible to prevent the driving conditions of the electric tool 10 from being inadvertently switched. Since this start operation is a unique operation that is very unlikely to be performed during work compared to the off operation shown in FIG. 5, it is more resistant to false detection than the start operation shown in FIG. 5 and FIG. 6, if the ON operation of the trigger lever 20a is detected during the sensor input permission period, the sensor input permission period, that is, the motion switching control is interrupted at that time.

Next, the operation of the electric power tool 10 configured as described above will be described.
When the user wants to switch the driving conditions by manual operation (motion) of the electric tool 10, after performing a predetermined start operation, the electric tool 10 is within the sensor input permission period until a predetermined time elapses. A manual operation corresponding to a desired driving condition is performed. In the present embodiment, one of the two types of operation methods illustrated in FIG. 5 and the operation method illustrated in FIG. 6 is employed as the start operation. In any of the start operations, when the user finishes the start operation with the trigger lever 20a, the power tool 10 enters an operation stop state. For this reason, detection of the hand movement (motion) by the motion sensor 23 is performed under the stop state of the electric power tool 10.

  The control unit 28 executes a program for motion switching control shown in the flowchart of FIG. Hereinafter, the motion switching control executed by the control unit 28 will be described with reference to the flowchart of FIG.

  First, in step S10, it is determined whether or not a motion switching start operation has been detected. For example, when the start operation shown in FIG. 5 is adopted, it is determined that the start operation is detected when the operation (retraction operation) of the trigger lever 20a by the user is stopped and the trigger switch 20 is switched from on to off. For example, in the example shown in FIG. 5, since the trigger switch 20 has been switched from on to off, it is determined that the start operation has been detected.

  On the other hand, when the start operation shown in FIG. 6 is adopted, the user repeatedly turns on and off the trigger lever 20a a plurality of times during the set time, and the sum of the on and off of the trigger switch 20 is within the set time. It is determined that the start operation has been detected when there are multiple times. For example, in the example shown in FIG. 6, since the sum of ON and OFF is performed three times (2 times OFF and 1 time ON) within the set time, it is determined that the start operation has been detected.

  When this start operation is detected (positive determination), the process proceeds to the next step S20, and when the start operation is not detected (negative determination), the process ends. When a start operation is detected, the motion sensor input permission signal (see FIGS. 5 and 6) generated by a signal generation circuit (not shown) in the control unit 28 is changed from the prohibited state (Low level) to the permitted state. (High level) and the time counting (counting) by the time counter is started. Then, only the signal from the motion sensor 23 input during the sensor input permission period is valid, and the next motion detection process is performed based on the valid signal.

  In the next step S20, it is determined whether or not a motion is detected. That is, it is determined whether or not a motion (manual operation) in a preset direction is detected within the sensor input permission period. Here, the user who wants to switch the electric tool 10 to a desired driving condition by a manual operation performs a manual operation of moving the gripped electric tool 10 in a direction corresponding to the desired driving condition after performing the start operation. The motion sensor 23 that detects the motion due to the manual operation outputs a signal corresponding to the detected motion. Since the motion sensor 23 of this embodiment is a three-axis type, it outputs three types of signals XYZ. The control unit 28 determines whether a motion in any one of the six directions is detected based on the three types of signals XYZ. If a motion is detected (positive determination), the process proceeds to the next step S30, and if no motion is detected (negative determination), the process proceeds to step S40.

  In step S30, control for switching to a driving condition corresponding to the detected motion is executed. That is, the control unit 28 acquires the direction of the detected motion (motion detection direction), refers to the reference data D shown in FIG. 7, and acquires the drive condition corresponding to the motion detection direction. For example, if the motion detection direction is the X direction (forward), “lighting” is acquired as the driving condition, “forward rotation” is acquired if it is the Y direction (right), and “high speed” is acquired if it is the Z direction (upward). Is obtained.

  And the control part 28 controls a control object via the drive circuit corresponding to the drive condition at that time, and switches to the drive condition of a control object. For example, if the drive condition is “lighting”, the illumination unit 21 is turned on via the light emission drive circuit 34. If the driving condition is “forward rotation”, the switching drive circuit 32 is controlled to switch the rotation direction of the motor 25 to “forward rotation”. Further, if the driving condition is “high speed”, the speed change actuator 27 is driven via the speed change drive circuit 33 to switch the power transmission unit 26 to a high speed gear ratio.

  In step S40, it is determined whether or not the sensor input permission period has ended. If the sensor input permission period has not ended (negative determination), the process returns to step S20. If the sensor input permission period has ended (positive determination), the process ends. That is, during the sensor input permission period, it is determined whether or not the next motion is detected (S20), and when a manual operation (motion) for switching to another driving condition by the user is detected, the process proceeds to step S30. move on. And control which switches to the drive condition according to detected motion is performed (S30). Thus, during the sensor input permission period, the user can sequentially switch a plurality of types of control objects to desired driving conditions. When the sensor input permission period ends, the motion detection by the motion sensor 23 is not performed thereafter.

  For example, even if the user performs a manual operation with the electric power tool 10 being worked on, the manual operation is not detected unless there is a start operation before that. For this reason, it can be avoided that a manual operation necessary for the work performed during the work is erroneously detected as a motion, and the electric tool 10 is not intentionally switched to another driving condition. In addition, since the motion detection is performed while the power tool 10 is stopped, it is possible to avoid switching to an unintended drive condition that occurs when a vibration such as vibration generated in the power tool in operation is erroneously detected as a motion.

As described above in detail, according to the present embodiment, the following effects can be obtained.
(1) The power tool 10 can be switched to a driving condition according to the manual operation detected by the motion sensor 23. Therefore, it is possible to switch to a desired driving condition with one hand, and usability is improved. In addition, since the motion is detected by the motion sensor 23 in a stopped state where the trigger switch 20 is not operated, for example, the manual operation during the operation is detected, and the power tool 10 may have other driving conditions contrary to the user's intention. The inconvenience of switching to can be avoided.

  (2) By limiting the sensor input period for motion detection, it is possible to avoid a situation in which the operation is unintentionally switched to another driving condition. That is, a manual operation necessary for work is erroneously detected as a motion by the motion sensor, the gear ratio is unintentionally switched to another gear ratio, the gear is intentionally switched to another rotation direction, and the lighting unit 21 is turned on / off. It is possible to prevent unintentional switching.

  (3) When the start operation shown in FIG. 5 is adopted, the motion switching control is performed based on the signal of the motion sensor 23 input during a predetermined time T (sensor input permission period) after the trigger switch 20 is turned off. Do. Therefore, it is possible to almost certainly avoid the drive condition being switched unintentionally during the operation using the electric tool 10. For example, when the trigger lever is operated (that is, during the work), the motion sensor detects the hand movement by moving the power tool 10 for the work, and the motion sensor detects the hand condition by controlling the driving condition. There is a possibility that the driving condition of the electric power tool 10 is unintentionally switched. However, since it is configured to detect only the manual operation while the work is not stopped when the trigger switch 20 is not operated, it is possible to more reliably avoid the unintentional switching of the driving condition during the work as described above.

  (4) When the start operation shown in FIG. 6 is adopted, based on the signal of the motion sensor 23 input during a predetermined time T (sensor input permission period) from when the trigger switch 20 is repeatedly turned on and off a predetermined number of times. To perform motion switching control. Therefore, unintentional switching of driving conditions during work using the electric power tool 10 can be avoided more reliably than in the configuration employing the start operation of FIG.

  (5) A power transmission unit 26 (an example of a transmission unit) that can change the power of the motor 25 to a plurality of transmission ratios is provided, and the drive condition is the transmission ratio of the power transmission unit 26. When the sensor 23 detects a manual motion in one direction, it performs control to increase the gear ratio, while when it detects a manual motion in the reverse direction, it performs control to decrease the gear ratio. Therefore, the gear ratio of the electric tool 10 can be easily switched with one hand by a manual operation. That is, the rotational speed and torque value of the tip tool 16 can be easily switched with one hand by the manual operation of the electric tool 10. Further, since the manual operation for increasing the gear ratio and the manual operation for decreasing the gear ratio are in one direction and the opposite direction, it is difficult to mistake the manual operation for increasing and decreasing the gear ratio. For this reason, it is easy to avoid the inconvenience that the unintended driving conditions are switched by mistake in the direction of the manual operation.

  (6) The control unit 28 changes the torque value by the motion detected by the motion sensor 23. Therefore, the torque value of the tip tool 16 can be easily changed with one hand by the manual operation of the power tool 10.

  (7) The lighting unit 21 that illuminates at least one of the tip tool 16 and its periphery is provided, and the driving condition is lighting (ON) / extinguishing (OFF) of the lighting unit 21. The control unit 28 controls to turn on the illumination unit 21 when the motion sensor 23 detects an operation in one direction, and turns off the illumination unit 21 when an operation in the reverse direction is detected. Take control. Therefore, on / off of the illumination unit 21 can be easily switched by one hand with one hand. In addition, since each direction of the manual operation for turning on and off the illumination unit 21 is one direction and the opposite direction, it is difficult to mistake the manual operation for turning on and off the illumination unit 21. For this reason, it is difficult to cause an inconvenience in which an unintended driving condition other than lighting / extinguishing of the illumination unit 21 is switched by mistake in the direction of manual operation.

  (8) An informing unit 29 for informing setting information indicating a correspondence relationship between motion (motion detection direction) and driving conditions is provided. Therefore, the user can know the relationship between the motion detection direction set in the electric tool 10 and the driving conditions. For example, if the user does not have a function for notifying the setting information, the user needs to perform a manual operation on a trial and confirm the driving conditions corresponding to the manual operation in order to confirm the setting content or to know the setting content. is there. However, according to the present embodiment, since the setting information is notified by the notification unit 29, it is possible to know the setting contents without performing this type of trial manual operation. For example, even if the setting information is forgotten or the power tool 10 borrowed from another person is used, the setting information can be confirmed in advance by the notification unit 29 and the subsequent work can be performed smoothly.

  (9) A setting unit 28a is provided that can be set to assign a drive condition indicating the switching instruction content such as the rotation direction, speed change, and illumination to a motion (motion detection direction) prepared in advance. Therefore, the user can customize to assign a desired driving condition to the motion. For this reason, the user can improve the work efficiency using the electric power tool 10 by assigning, for example, a driving condition having a high change frequency to a motion that is easy for the user to manually operate.

  (10) The motion sensor 23 is disposed at a position closer to the battery pack 12 than the grip portion 15 (grip portion) gripped by the user in the main body housing 13 (an example of a housing). Accordingly, since the motion sensor 23 can detect a relatively large motion in which the manual motion is amplified, the motion can be detected with a relatively high sensitivity. For this reason, it is easy to avoid the inconvenience that the user's small hand movement is detected as a different motion and the driving condition is not intended by the user. In addition, the user can switch the driving conditions only by moving the electric tool 10 small, and can switch the driving conditions as intended.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIGS. 10 and 11. This 2nd Embodiment is an example from which the structure of the power transmission part 26 differs. Hereinafter, the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only different portions will be described.

The power tool 10 of this embodiment is a multi-impact driver as an example, and includes an impact mode and a drill driver mode (an example of a drill mode).
As shown in FIG. 10, the power transmission unit 26 that inputs the rotation of the motor 25 as an example of the power source and transmits the rotation as the rotation of the chuck unit 17 is a multi-impact switching unit that can switch between the impact mode and the drill driver mode. Is configured. Therefore, the power transmission unit 26 includes an impact force generation unit 50 that generates a shock force (impact force) applied to the output shaft 37 by converting the rotational power of the motor 25 into a pulsed torque in the impact mode.

  As shown in FIG. 10, a transmission mechanism 41 and a transmission switching unit 42 having the same configuration as that of the first embodiment are provided at adjacent positions on the rotating shaft 25 a side of the motor 25. The impact force generation unit 50 is connected to the output side (right side in FIG. 10) of the speed change mechanism unit 41.

  As shown in FIG. 10, the impact force generator 50 transmits the rotation of the lock shaft 51 connected to the output shaft of the speed change mechanism 41 and the lock shaft 51 decelerated by the speed change mechanism 41 and increased in torque. A hammer 52 and an anvil 53 struck by the hammer 52. The hammer 52 is provided so as to be rotatable with respect to the lock shaft 51 rotated by the output of the transmission mechanism 41 and slidable in the axial direction along the lock shaft 51. Further, the hammer 52 is urged forward (to the right in FIG. 10) by an elastic force of a coil spring (not shown) interposed between the transmission mechanism 41 and the hammer 52, so that the anvil 53 and the hammer 52 are pressed against each other. It is arranged at the position where it touches. The hammer 52 has a contact portion (not shown) extending in the radial direction of the anvil 53 and a pair of contact portions in the circumferential direction. The rotation of the lock shaft 51 decelerated by the speed change mechanism 41 is 52 and the anvil 53 are integrally rotated through the abutment of the abutment portion, and transmitted to the output shaft 37 (main shaft) coaxial with the anvil 53 (see FIG. 2). The rotation of the output shaft 37 is transmitted to the chuck portion 17.

The memory of the control unit 28 stores a motion switching control program shown in the flowchart of FIG. 9 and reference data D shown in FIG. 11 as one of the programs.
In the present embodiment, the front / rear / left / right and up / down motions of the electric tool 10 are switched between the impact mode and the drill mode in the power transmission unit 26, the rotation direction of the motor 25 is switched, and the illumination unit 21 is turned on (ON). ) · Switched off (off). Specifically, as in the reference data D shown in FIG. 11, the correspondence relationship between the motion detection direction and the drive condition is as follows.

  That is, as illustrated in FIG. 11, switching of turning on / off of the illumination unit 21 (light emitting unit 21 a) is assigned to the motion detection direction “X-axis direction (front-rear direction)”. As driving conditions, “lighting” is set in the X direction (forward direction), and “lights off” is set in the −X direction (rear direction). Further, forward / reverse switching of the motor 25 is assigned to the motion detection direction “Y-axis direction (left-right direction)”. As drive conditions, “forward rotation” is set in the Y direction (right direction), and “reverse rotation” is set in the −X direction (left direction). Further, switching of the gear ratio of the power transmission unit 26 by the shift actuator 27 is assigned to the motion detection direction “Z-axis direction (vertical direction)”. As drive conditions, a drill driver mode is set in the Z direction (upward), and an impact mode is set in the -Z direction (downward).

  Therefore, in FIG. 8, it is possible to switch to the drill driver mode by an upward movement of the electric tool 10 and to switch to the impact mode by a downward movement of the electric tool 10. The power tool 10 of the present embodiment also has a customization function that allows the user to set the correspondence between the motion detection direction and the drive condition as desired, and the reference data D shown in FIG. 11 is also changed by the customization function. It is possible.

  Therefore, even if the electric tool 10 is a multi-impact type having an impact mode in addition to the drill driver mode, the drill driver mode and the impact mode can be switched manually. Moreover, since the signal input of the motion sensor 23 is permitted only during the sensor input permission period from the start operation until the predetermined time T elapses, unintentional switching between the drill driver mode and the impact mode occurs during the work. Can be avoided. In the case of an electric tool having a configuration that does not have a driver function, a drill mode may be used instead of the drill driver mode.

According to the second embodiment, the effects (1) to (10) of the first embodiment can be obtained similarly, and the following effects can also be obtained.
(11) The power transmission unit 26 (an example of a multi-impact switching unit) that switches between the impact mode and the drill driver mode is provided, and the impact mode and the drill mode can be switched by manual operation of the electric tool 10. In addition, unintentional switching between the impact mode and the drill mode during work can be avoided.

(Third embodiment)
Next, a third embodiment will be described. The third embodiment is different from the above embodiments in the trigger operation. That is, in the embodiment, the operation of the trigger lever 20a is the start operation, but the operation of the forward / reverse selector switch 19 is the start operation. The basic configuration of the present embodiment is the same as that of the first embodiment, and only the processing related to the trigger operation when the control unit 28 performs motion switching control is different.

  In the present embodiment, the user switches the forward / reverse selector switch 19 to the neutral position when performing motion switching. When the control unit 28 detects that the forward / reverse selector switch 19 has been switched to the neutral position, the control unit 28 starts a sensor input permission period. When the motion of the power tool 10 is detected based on the detection signal from the motion sensor 23 during the sensor input permission period, the reference data D shown in FIG. 7 is referred to and the driving condition is switched to the motion detection direction at that time. .

  The sensor input permission period does not necessarily have to be set in time. For example, the sensor input is permitted from the time when the forward / reverse changeover switch 19 is detected to be switched to the neutral position until the drive start of the trigger lever 20a and the switch to a position other than the neutral position, whichever comes first. It is good also as a period.

According to the third embodiment, the following effects can be obtained.
(12) Control is performed based on the signal of the motion sensor 23 input when the forward / reverse selector switch 19 is neutral. Therefore, it is possible to avoid unintentionally switching the driving conditions of the electric tool 10 during the work.

(Fourth embodiment)
In each of the embodiments described above, the manual operation is a linear one-way operation, but in the present embodiment, the manual operation is an example of a rotational operation. Note that the basic configuration of the present embodiment is the same as that of the first embodiment, and the setting content of the manual operation by the user when the control unit 28 performs the motion switching control is different.

  When the predetermined driving condition is the rotation direction of the tip tool 16, the control unit 28 has the chuck unit 17 (rotation) on which the tip tool 16 is mounted in the same direction as the rotation direction of the motion detected by the motion sensor 23. The rotation direction of an example of the output unit, that is, the rotation direction of the motor 25 is switched. After performing the start operation by the trigger lever 20a, the user performs a manual operation of drawing a circle in the same rotation direction as the desired rotation direction of the electric tool 10 during the sensor input permission period. The motion sensor 23 includes two triaxial acceleration sensors as an example, and detects the rotation direction of a manual operation for drawing a circle based on the detected components in the X, Y, and Z axis directions of the two acceleration sensors. Of course, the rotation direction of the manual operation may be detected by examining the state of change in acceleration based on a data group in which accelerations sequentially detected using one acceleration sensor are accumulated.

  When the control unit 28 detects that the user has performed a manual operation of drawing a circle in the clockwise direction on the electric tool 10 based on the signal from the motion sensor 23, the control unit 28 switches the rotation direction of the tip tool 16 to normal rotation based on the reference data. . On the other hand, when the control unit 28 detects that the user has performed a manual operation of drawing a circle in the counterclockwise direction on the electric tool 10 based on the signal of the motion sensor 23, the control unit 28 reverses the rotation direction of the tip tool 16 based on the reference data. Switch to.

Therefore, according to the fourth embodiment, the following effects can be obtained.
(13) The driving condition is the rotation direction of the chuck portion 17, and the motion detection direction corresponding thereto is a manual operation of drawing a circle in the same direction as the rotation direction of the tip tool 16. When the motion sensor 23 detects a motion for drawing a circle by the motion sensor 23, the control unit 28 switches the rotation direction of the chuck unit 17 to the same direction as the rotation direction of the motion. Switching of the rotation direction of the tip tool 16 can be performed sensuously by a manual operation of drawing a circle in the same direction as the rotation direction. For this reason, it is possible to switch the rotation direction of the tip tool 16 without making a mistake in manual operation.

The embodiment may have the following aspects.
In each of the above embodiments, at least one of the shift switch 18, the forward / reverse switch 19, and the operation switch 22 may be eliminated. For example, all of the switches 18, 19, and 22 may be eliminated.

  In each embodiment, the predetermined driving condition may be at least one of on / off of an illumination unit that illuminates at least one of the tip tool and its periphery, and illumination intensity. For example, the predetermined drive condition may be the intensity of illumination by the illumination unit 21 instead of turning on / off the illumination unit 21. Further, the predetermined driving condition may be both on / off of the illumination unit 21 and the intensity of illumination by the illumination unit 21. In this case, when the control unit 28 detects a predetermined manual operation under the off state of the illumination unit 21, the control unit 28 first turns on the illumination unit 21, and then detects a predetermined manual operation under this lighting state. The intensity of illumination of the unit 21 is changed. If there are multiple types of illumination intensities, each time a predetermined manual action is detected, the illumination intensity is switched in order, and after the illumination intensity has been switched, the illumination unit is further detected. 21 is turned off. Note that the predetermined manual operation is not limited to a one-way manual operation, and the lighting unit 21 may be turned on / off in one direction, and the illumination intensity may be changed in another one-way operation.

  -It is good also as a structure which can switch several drive conditions at once by one manual operation. For example, the setting unit 28a is configured so that a plurality of driving conditions can be combined and set for one motion detection direction. For example, a combination of low speed and forward rotation is set for one direction, and high speed and reverse rotation are set for the other direction, which is the opposite direction. According to this configuration, a plurality of types of driving conditions can be switched by one manual operation.

  -The direction of the manual operation is not limited to the XYZ axis direction, that is, the front-rear direction, the left-right direction, and the up-down direction of the power tool, and is an oblique direction that is the middle of these two directions (a direction that forms 45 degrees). Also good. Further, as in the fourth embodiment, the manual operation of rotating the electric tool 10 so as to draw a circle is employed for the shift switching control by the shift actuator 27, or the on / off of the illumination unit 21 or the illumination intensity switching control. May be.

-Instead of a 3-axis motion sensor, a 2-axis or 1-axis motion sensor may be used. For example, a biaxial or uniaxial acceleration sensor may be used.
In the above-described embodiment, the power transmission unit 26 is in the second speed mode. However, the third speed mode, the fourth speed mode, and the fifth speed mode and the sixth speed mode may be employed.

  Predetermined driving conditions are not limited to shifting, rotating direction (forward / reverse), lighting on / off, and lighting intensity. For example, switching to the vibration mode may be set as a predetermined driving condition. In addition, as the predetermined drive condition, all of the plurality of drive conditions described above may be employed, some of them may be employed, or only one may be employed. For example, only the speed (speed ratio) may be employed, only the rotational direction may be employed, or only the illumination may be employed.

  The power transmission unit 26 may be applied to an electric tool that is not electric. Even in this configuration, if at least one of the power source and the illumination unit is an electric type, the rotation direction of the tip tool 16 or the lighting unit 21 is switched on / off by manual operation of the electric tool 10. It can be carried out.

Although the power tool is rechargeable, it may be applied to a non-rechargeable type AC power tool.
Furthermore, the electric tool is not limited to an electric drill driver, and can be similarly applied to other electric tools that use a motor as a power source. For example, the present invention can be applied to an electric impact driver, hammer drill, impact wrench, circular saw, jigsaw, screw driver, vibration driver, grinder, nailing machine, and the like. In this case, the power tool is not limited to concrete, and the target material may be wood, plastic, metal, ceramic, or the like.

-The rotation output part should just be a structure which can mount | wear with a front-end tool, and may have not only the chuck | zipper part 17 but a screw shaft and a socket part.
The power source of the electric tool is not limited to an electric type such as a motor, and may be a power source that is driven by air pressure. In addition, a power source driven by hydraulic pressure may be used. That is, the power source may be any power source that is driven by power according to a known method such as electricity, air pressure, and hydraulic pressure. Even if the power source is not an electric type, switching control by manual operation (motion) is possible as long as the shift actuator 27, the illumination unit 21, and the like to be controlled based on the motion sensor signal are driven by electric power. It is. Even if the power source is pneumatic or hydraulic, if the tip tool is shifted by controlling the opening of the solenoid valve in the pneumatic circuit or hydraulic circuit, the shift to the solenoid valve is controlled by current control. Is also possible.

  DESCRIPTION OF SYMBOLS 10 ... Electric tool, 12 ... Battery pack as an example of a battery part, 13 ... Main body housing which is an example of a housing | casing, 15 ... Gripping part, 16 ... Tip tool, 17 ... Chuck part as an example of a rotation output part, 19 ... forward / reverse changeover switch, 20 ... trigger switch as an example of operation unit, 21 ... illumination unit, 21a ... light emitting unit, 23 ... motion sensor, 25 ... motor as an example of power source, 26 ... as example of transmission unit Power transmission unit, 27... Speed change actuator, 28... Control unit, 28 a... Setting unit, 29 ... notifying unit, T ... predetermined time, D ... reference data as an example of setting information.

Claims (12)

A power tool including a power source that gives power to a rotation output unit to which a tip tool is mounted, and an operation unit that instructs the operation of the power source,
A motion sensor capable of detecting motion due to the manual operation of the operator holding the housing;
When the operation unit is not operated, a manual motion is detected by the motion sensor, and the detected manual motion matches a predetermined manual motion. A control unit for changing to a predetermined driving condition associated with the hand movement of
An electric tool comprising:   The power tool according to claim 1, wherein the control unit performs control based on a motion sensor signal input during a predetermined time after the operation unit is turned off.   2. The electric tool according to claim 1, wherein the control unit performs control based on a motion sensor signal input during a predetermined time after the operation unit is repeatedly turned on and off a predetermined number of times. Further equipped with a forward / reverse selector switch,
The power tool according to claim 1, wherein the control unit performs control based on a signal of a motion sensor input when the forward / reverse selector switch is neutral. And further comprising a transmission unit that shifts the power of the power source and transmits the power to the rotation output unit and is switched to a plurality of transmission ratios by the control unit;
The predetermined driving condition is a gear ratio of the transmission unit, and the control unit increases the transmission ratio of the transmission unit in the reverse direction when an operation in one direction is detected by the motion sensor. The power tool according to any one of claims 1 to 4, wherein when an operation is detected, a gear ratio of the transmission unit is lowered. The predetermined driving condition is a rotation direction of the rotation output unit,
6. The electric tool according to claim 1, wherein the control unit switches a rotation direction of the rotation output unit in the same direction as the rotation direction detected by the motion sensor.   The power tool according to any one of claims 1 to 6, wherein the control unit changes a torque value according to a motion detected by the motion sensor. An illumination unit that illuminates at least one of the tip tool and the periphery of the tip tool;
The predetermined driving condition is at least one of on / off of the illumination unit and intensity of illumination,
The control unit according to any one of claims 1 to 7, wherein when the motion sensor detects an operation in one direction, the control unit changes at least one of on / off of the illumination unit and illumination intensity. The electric tool according to one item. A multi-impact switching unit that switches between impact mode and drill mode is further provided,
The predetermined driving condition is switching between the impact mode and the drill mode,
The control unit is set to the impact mode when an operation in one direction is detected by the motion sensor, and is set to the drill mode when an operation in a reverse direction is detected. The power tool according to any one of 1 to 8.   The power tool according to any one of claims 1 to 9, further comprising a notifying unit for notifying a correspondence relationship between the predetermined predetermined hand movement and the driving condition.   The power tool according to any one of claims 1 to 10, further comprising a setting unit configured to assign the driving condition to a motion defined by the predetermined manual operation. The housing includes a gripping part gripped by an operator, and a battery part capable of supplying power to the power source is detachably attached to a position opposite to the power source with respect to the gripping part,
The power tool according to any one of claims 1 to 11, wherein the motion sensor is arranged at a position closer to the battery part than the grip part in the housing.