JP5579902B2 - Electric tool - Google Patents

Description

The present invention relates to an electric tool capable of switching operating modes in any of a plurality of types.

Conventionally, as a power tool for a motor as a driving source, which is configured to be able to selectively operate is known in any of the operating modes of the multiple.

Such power tool, a display unit for displaying operation mode changeover switch for the user to switch the operation mode, and an operation mode that is currently set is provided (e.g., see Patent Document 1).

JP 2011-67910 A

However, if there are a large number of types and numbers of various switches and display units, the mounting area of the power tool increases correspondingly, leading to an increase in size and cost of the power tool. In the electric power tool described in Patent Document 1, since there are many switches and display units, the switch panel is arranged in two places. Such a configuration is not preferable in size and cost, Operation s selfish aspect of the power tool.

The present invention has been made in view of the above problem, in an electric tool capable of switching operating modes in any of the plurality of types, and an object thereof is to improve the user-friendliness.

The present invention made in order to solve the above problems is an electric tool having a plurality of operation modes , wherein the operation modes include two or more speed setting modes having different maximum rotation speeds of the motor and the maximum rotation speed of the motor. and a clamping object screw set speed change mode so that it is lowered after the sitting than front seating different and seated before and after. The power tool includes a motor and, intermittently blow capable impart blow to the rotating direction with respect to the original on the tool element a rotational driving force of the motor for generating a rotational driving force for driving the tool element mechanism and the rate at which the set switch is oN · OFF operation for you switch the setting of the operation mode, the operation mode is the set if it is set to one of the two or more speed settings mode a first display unit for performing a display indicating the setting mode, a second display unit for performing a display indicating that effect when the operation mode is set to the speed change mode is set by the setting switch operation A display control unit that controls the first display unit and the second display unit according to the mode . The setting switch , the first display unit, and the second display unit are provided on the same surface among the surfaces exposed to the outside of the power tool .

According to the electric tool having the above-described configuration, the user can perform both the operation of the setting switch and the confirmation of the display content of each display unit on the same surface (toward the same surface). Therefore, for example, the patent as described in Reference 1, as compared with each of the different surfaces are separate switch panel provided et the power tool, it is possible to further improve the user-friendliness.
As the speed setting mode, the maximum rotational speed is relatively lowest weak mode, the maximum rotational speed relative to the highest intensity mode, and the maximum in the rotational speed is lower than the higher intensity mode than the weak mode mode, three May be configured as follows. That is, the first display unit includes a first LED, a second LED, and a third LED, and the second display unit includes a fourth LED . Display control unit, when the operation mode is set to the weak mode turns on the first LE D, if the operation mode is set to the medium mode lit first LED and a second L ED When the operation mode is set to the strong mode, the first LED, the second LED, and the third LED are turned on. When the operation mode is set to the speed change mode , the first LED is turned on . The LED, the second LED, and the third LED are all turned off and the fourth LED is turned on .

It is a perspective view showing the appearance of the electric tool of an embodiment. It is a block diagram showing the structure of the switch panel of 1st Embodiment. It is a block diagram showing schematic structure of the controller of 1st Embodiment. It is a time chart for demonstrating the switching method of an operation mode and light setting in 1st Embodiment. It is a flowchart showing the setting switching control process of 1st Embodiment. It is a block diagram showing the structure of the switch panel of 2nd Embodiment. It is a time chart for demonstrating the switching method of an operation mode and light setting in 2nd Embodiment. It is a flowchart showing the setting switching control process of 2nd Embodiment. It is a block diagram showing the other structural example of a switch panel.

Preferred embodiments of the present invention will be described below with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, the electric power tool 1 of the present embodiment is configured as a rechargeable impact driver, and includes a main body housing 5 and a battery pack 6. The main body housing 5 is formed by assembling the left and right half housings 2 and 3, and a handle portion 4 is extended below the main body housing 5. The battery pack 6 is detachably attached to the lower end of the handle portion 4.

  A rear portion of the main body housing 5 is a motor storage portion 7 that stores a motor 20 that is a drive source of the electric tool 1, and a driving force transmission mechanism (such as a speed reduction mechanism) is located in front of the motor storage portion 7. And a striking mechanism (both not shown) are housed. A sleeve 8 for projecting a tool bit (for example, a driver bit, which corresponds to an example of the tool element of the present invention) not shown is provided at the tip of the main body housing 5 at the tip of the driving force transmission mechanism. Yes.

  The rotation of the motor 20 is decelerated and transmitted to the sleeve 8 via the driving force transmission mechanism, and the striking mechanism is intermittently striking the sleeve 8 in the rotational direction based on the rotational force. Is granted.

  The striking mechanism includes, for example, a spindle, a hammer, and an anvil. The spindle is rotated through a driving force transmission mechanism, the hammer rotates together with the spindle and is movable in the axial direction, the anvil is disposed in front of the hammer, and the sleeve 8 is disposed at the tip of the anvil. A tool bit is attached through.

  More specifically, in the striking mechanism, when the spindle rotates with the rotation of the motor 20, the anvil rotates through the hammer to rotate the sleeve 8 (and thus rotate the tool bit). Thereafter, when the screw tightening by the tool bit is advanced and the load on the anvil is increased, the hammer is retracted against the biasing force of the coil spring and detached from the anvil. Then, the hammer advances with the urging force of the coil spring while rotating together with the spindle and re-engages with the anvil, whereby an intermittent hit is applied to the anvil, whereby retightening can be performed. Such a striking mechanism is well known, for example, as disclosed in Japanese Patent Application Laid-Open No. 2006-218605, and detailed description thereof is omitted here.

  A trigger switch 10 that can be operated (pulled) while the user of the electric power tool 1 holds the handle portion 4 is provided on the front side of the upper end of the handle portion 4 in the main body housing 5.

  The battery pack 6 includes a battery 16 in which secondary battery cells that generate a predetermined DC voltage are connected in series. In the handle portion 4, there is housed a controller 11 that operates by receiving power supply from the battery 16 in the battery pack 6 and rotates the motor 20 according to the operation amount of the trigger switch 10.

Further, a light 9 for irradiating light in front of the electric power tool 1 is provided above the trigger switch 10 in the main body housing 5. The light 9 is turned on when the user operates the trigger switch 10. However, in this embodiment, not necessarily turned upon operation of the trigger switch 10, the user whether the write set is turned upon operation of the trigger switch 10 is configured to be switchable.

That is, when the light setting is set to “ON state”, the light 9 is turned on when the trigger switch 10 is operated. On the other hand, if the light setting is set to “OFF”,
Even if the trigger switch 10 is operated, the light 9 is not turned on.

  In addition, a switch panel 30 is provided on the lower end side of the handle portion 4 for receiving an operation mode and light setting switching operation of the electric tool 1 and displaying the operation mode. The electric power tool 1 of the present embodiment includes four types of operation modes, and is configured to be able to switch the operation mode by a user switching operation. As shown in FIG. 1, the switch panel 30 is provided on the same surface among the surfaces exposed to the outside of the electric power tool 1.

  The operation modes included in the electric power tool 1 of the present embodiment are “weak mode”, “medium mode”, “strong mode”, and “text mode” (“tex” is a registered trademark). Among these, the weak mode has the lowest maximum rotation speed (that is, the highest impact force) with respect to the maximum rotation speed of the motor as the drive source (and hence the maximum impact force during the impact operation) during operation as an impact driver. Weak) mode.

  The middle mode is a mode in which the maximum rotation speed of the motor is higher by a predetermined amount than the weak mode (that is, the impact force is higher by a predetermined amount than the weak mode). The strong mode is a mode in which the maximum rotation speed of the motor is higher by a predetermined amount than the middle mode (that is, the impact force is stronger by a predetermined amount than the middle mode). The text mode is an operation mode for tightening the tex screw, and it is based on the operation as an impact driver. It is rotated at a predetermined maximum rotational speed from the start of tightening until sitting, and after sitting, before sitting This mode operates to rotate at a maximum rotation speed lower than the maximum rotation speed.

These four types of operation modes, the weak mode, the medium mode, the strong mode, and the tex mode, can be selectively switched by the operation of the switch panel 30 by the user .

  In the electric power tool 1 of the present embodiment, when the user operates the trigger switch 10, the maximum rotation speed corresponding to the set operation mode is set as an upper limit, and the setting corresponding to the operation amount (pull amount) of the trigger switch 10 is made. The motor 20 rotates at the rotation speed.

  The motor 20 does not start rotating as soon as the trigger switch 10 is pulled even a little, but the motor 20 does not rotate until a predetermined amount (although a small amount) is pulled from the beginning of the pulling. When the pulling operation exceeds a predetermined amount, the motor 20 starts to rotate, and then the rotation speed of the motor 20 increases according to the pulling amount (for example, approximately in proportion to the pulling amount). Then, when it is pulled to a predetermined position (for example, when it is completely pulled out), the rotational speed of the motor 20 reaches the maximum rotational speed corresponding to the set operation mode.

  Therefore, for example, in the three modes of the weak mode, the medium mode, and the strong mode, even if the pulling amount of the trigger switch 10 is the same, the rotation speed of the motor 20 is the slowest in the weak mode and the fastest in the strong mode. Even in the text mode, even when the pull amount of the trigger switch 10 is the same, the rotational speed of the motor 20 is slower after the seating than before the text screw is seated.

  As shown in FIG. 2, the switch panel 30 has one setting switch 31 that is operated by the user to switch between the operation mode and the light setting, and an operation mode in which the operation mode set by the setting switch 31 is displayed. A display unit 32 and a battery remaining amount display unit 33 that displays the remaining capacity of the battery 16 in stages are provided.

That is, the electric power tool 1 of the present embodiment is configured such that the operation mode switching and the light setting switching can be performed using the same setting switch 31. How the operation mode switching and the light setting switching are identified using the same setting switch 31 will be described in detail later with reference to FIGS.

The setting switch 31 is a mechanical switch that is turned off when not operated and turned on when pressed by the user.
More specifically, the battery remaining amount display unit 33 includes three LEDs, and the number of LEDs corresponding to the remaining capacity of the battery 16 is lit. That is, the lighting state is switched every three stages when the remaining capacity is sufficient, when it is medium, and when it is small (however, the tool operation is possible). When the remaining capacity is sufficient, all three LEDs are lit as illustrated in FIG. When the remaining capacity is medium, two LEDs other than the uppermost part are lit as illustrated in FIG. When the remaining capacity is small, one LED at the bottom lights up.

  More specifically, the operation mode display unit 32 sets the tex mode display LED 36 that is turned on when the operation mode is set to the tex mode, and sets the operation mode to one of the weak mode, the medium mode, and the strong mode. The weak display LED 41 that lights when the operation mode is set, the middle display LED 42 that lights when the operation mode is set to either the medium mode or the strong mode, and the light display LED 41 that lights when the operation mode is set to the strong mode And a strong display LED 43.

That is, when the operation mode is set to the tex mode, only the tex mode display LED 36 is lit in the operation mode display section 32 as illustrated in FIG. When the operation mode is set to the weak mode, only the weak display LED 41 is lit in the operation mode display section 32. When the operation mode is set to the middle mode, as illustrated in FIG. 2B, two LEDs of the weak display LED 41 and the middle display LED 42 are lit in the operation mode display unit 32. When the operation mode is set to the strong mode, in the operation mode display section 32, the three L of the weak display LED 41, the middle display LED 42, and the strong display LED 43 are displayed.
ED lights up. FIG. 2A illustrates a state in which all LEDs provided on the switch panel 30 are turned off.

  Next, the controller 11 that controls the drive of the motor 20 will be described with reference to FIG. The controller 11 includes a control circuit (microcomputer in this example) 12, a motor control unit 13, a circuit power supply unit 14, and a trigger switch (SW) detection unit 15. The switch panel 30 described above also constitutes the controller 11.

  The motor 20 of the present embodiment is configured by a three-phase brushless motor, and is connected to the battery 16 via the motor control unit 13. The motor control unit 13 controls the energization from the battery 16 to the motor 20 to rotate the motor 20. For example, the motor control unit 13 is a well-known six-switching element for switching the energization phase according to the rotation position of the motor 20. A full bridge circuit and a drive circuit for turning on and off each switching element by outputting a driving signal to each switching element constituting the full bridge circuit are included.

  ON / OFF of each switching element is controlled by a drive command from the control circuit 12. That is, the motor control unit 13 rotates the motor 20 by turning on one of the switching elements indicated by the drive command and driving the duty according to the drive command from the control circuit 12.

  The motor control unit 13 has a current detection function for detecting a current flowing through the motor 20, and outputs the detected current (specifically, a voltage signal indicating the detected current) to the control circuit 12.

  The circuit power supply unit 14 steps down the direct current voltage (for example, 14.4V) from the battery 16 to generate a control voltage (for example, 5V) that is a predetermined direct current voltage. First, it supplies each part in the controller 11. Each unit in the controller 11 operates using the control voltage from the circuit power source unit 14 as a power source.

  The trigger SW detection unit 15 detects the operation state of the trigger switch 10 and outputs the detection result (operation state) to the control circuit 12. Although not shown, the trigger SW detection unit 15 is turned off when the trigger switch 10 is not operated, and is turned on when the trigger switch 10 is operated to generate a drive start signal indicating that, And a variable resistor that generates a voltage (trigger operation amount signal) corresponding to the operation amount (pull amount) of the trigger switch 10. The drive start signal from the drive start switch and the trigger operation amount signal generated by the variable resistor are both input to the control circuit 12.

  In this example, the control circuit 12 is configured as a microcomputer including a CPU 21, a ROM 22, a RAM 23, a flash memory 24, and the like. The control circuit 12 controls driving of the motor 20 via the motor control unit 13 and the switch panel 30 while referring to various setting information stored in the flash memory 24 according to various control programs stored in the ROM 22 as appropriate. Various operations are performed, such as accepting an operation mode and light setting switching operation, lighting control of each LED of the switch panel 30, lighting control of the light 9, and the like. The setting state of the operation mode and the light setting is stored in the flash memory 24, and the stored content of the flash memory 24 is updated every time the setting content is switched by the user. Note that the various control programs are not necessarily stored in the ROM 22, and may be stored in another storage area such as the flash memory 24.

  The control of the motor 20 is generally performed as follows. That is, when a drive start signal is input from the trigger SW detection unit 15 due to the operation of the trigger switch 10, the control circuit 12 similarly follows the trigger operation amount signal from the trigger SW detection unit 15. PWM control of the motor 20 is started in order to rotate the motor 20 at a rotation speed corresponding to the operation amount (pull amount) of the trigger switch 10 indicated by

  That is, with the maximum rotation speed corresponding to the currently set operation mode as the upper limit, the motor control unit 13 causes the rotation speed to increase as the pulling amount of the trigger switch 10 increases (that is, the drive duty ratio increases). Set the drive duty. In a state where the user has fully pulled the trigger switch 10, the drive duty is a value corresponding to the maximum rotation speed in the set operation mode.

  Further, when the operation mode is set to the tex mode, it is necessary to detect the seating of the tex screw. This seating detection is performed based on the detected current from the motor control unit 13. That is, when the tex screw is seated after the rotation of the motor 20 starts, the rotation of the motor 20 is forcibly decelerated. This deceleration appears as a change in the detected current. Therefore, the control circuit 12 detects the seating of the tex screw based on the detected current from the motor control unit 13, and switches the maximum rotational speed between before and after the seating.

  The control of the light 9 is performed as follows. That is, the control circuit 12 turns off the light 9 when the trigger switch 10 is not operated. When the trigger switch 10 is operated and a drive start signal is input from the trigger SW detector 15, the light 9 is turned on. While the trigger switch 10 is being operated, the light 9 is also continuously turned on. When the trigger switch 10 is in a non-operating state after lighting, the light is turned off after being kept on for a predetermined time (for example, 10 seconds).

  However, the lighting of the light 9 is performed when the light setting is set to the ON state. Therefore, when the light setting is set to the OFF state, the control circuit 12 does not turn on the light 9 even if the trigger switch 10 is operated.

  Next, operation mode switching control and lighting control of each LED of the switch panel 30 performed by the control circuit 12 will be described. As described above, in the electric power tool 1 of the present embodiment, the user can switch the operation mode and the light setting by using the same setting switch 31. Then, the control circuit 12 changes the operation mode according to the time that the setting switch 31 is pressed by the user or the like, that is, according to the time that the setting switch 31 is turned on (the time that the ON state is continued). Switch or switch light settings.

  More specifically, when the setting switch 31 is turned on by a user or the like, the control circuit 12 measures the duration time (ON duration time) of the ON state. This timing is performed, for example, by using a timer (not shown). This timer is preferably built in the control circuit 12.

  If the ON duration time is less than a preset specified time (0.7 seconds in this example), the operation mode is switched. For example, if the user releases the setting switch 31 and turns it off after 0.7 seconds have elapsed after the user has pressed the setting switch 31 to turn it on, the operation mode is switched.

  In this embodiment, the operation mode is switched in the order of weak mode → moderate mode → strong mode → text mode → weak mode →. Therefore, as long as the ON duration time is less than 0.7 seconds, the operation mode is switched in the above order every time the setting switch 31 is operated.

  On the other hand, when the ON duration is equal to or longer than the specified time (0.7 seconds), the control circuit 12 switches the light setting. For example, when 0.7 seconds have elapsed after the user has turned on by pressing the setting switch 31 (when the setting switch 31 is continuously pressed until 0.7 seconds have elapsed), 0.7 seconds have elapsed. At this point, the light settings will be switched.

  In this embodiment, there are two types of light settings: an ON state and an OFF state. Therefore, the order of switching the light settings by operating the setting switch 31 is the order of ON state → OFF state → ON state →. It is. Therefore, as long as the ON duration time is 0.7 or more, the light setting is alternately switched every time the setting switch 31 is operated.

  As described above, in the electric power tool 1 according to the present embodiment, the user presses the setting switch 31 for a long time (continues ON for 0.7 seconds or more) or presses the setting switch 31 for a short time (continues ON for less than 0.7 seconds). It is possible to freely switch operation modes or light settings.

  An example of the transition of the operation mode and the light setting in response to the operation of the setting switch 31 is shown in FIG. In the example shown in FIG. 4, at the time immediately before time t1, the operation mode is set to the weak mode and the light setting is set to the OFF state. Regarding the vertical axis of the time chart of FIG. 4, “ON” for the operation mode indicates that the operation mode is set, and “OFF” for the operation mode is set for the operation mode. “ON” indicates that the light setting is set to the ON state, and “OFF” indicates that the light setting is set to the OFF state. The same applies to the time chart of FIG. 7 of the second embodiment to be described later.

  When the setting switch 31 is turned on by the user or the like at time t1 and 0.7 seconds have passed without being turned off (time t2), the light setting is switched to the ON state when 0.7 seconds have passed. Thereafter, the setting switch 31 is turned off at time t3. The setting switch 31 is turned on again at time t4. If the setting switch 31 is turned off at time t5 after 0.3 seconds without being turned on for 0.7 seconds, the operation is performed when the setting switch 31 is turned off. The mode switches. That is, the operation mode is switched from the weak mode to the medium mode. Thereafter, the setting switch 31 is turned on again at time t6. However, the setting switch 31 is turned off when the setting switch 31 is turned off at time t7 0.4 seconds later without being turned on again for 0.7 seconds. At this point, the operation mode is switched from the medium mode to the strong mode.

  Thereafter, when the setting switch 31 is turned on for 0.1 second from time t8 to t9, the operation mode is switched from the strong mode to the text mode, and further, for the next 0.1 second from time t10 to t11. When 31 is turned on, the operation mode is switched from the text mode to the weak mode.

Then, after the setting switch 31 is turned on again at time t12, when the ON state continues for 0.7 seconds (time t13), the light setting is switched from the ON state to the OFF state.
Next, a setting switching control process executed by the control circuit 12 for switching the operation mode and the light setting (specifically, executed by the CPU 21) will be described with reference to FIG. When the control voltage is supplied from the circuit power supply unit 14 and the operation starts, the CPU 21 starts the setting switching control process.

  When executing the setting switching control process, the CPU 21 first determines whether or not the setting switch 31 is turned on (pressed) in S110. While the setting switch 31 is not turned on (not pressed), the determination process of S110 is repeated, but when the setting switch 31 is turned on, 0.7 seconds have elapsed in the turned on state in S120. Judge whether or not. If 0.7 seconds have not elapsed, the process proceeds to S170, where it is determined whether or not the setting switch 31 has been turned off. If not, the process returns to S120. .

  If it is determined in the determination process of S170 that the setting switch 31 has been turned off, it means that the setting switch 31 has been turned off without the ON continuation state continuing for 0.7 seconds, so the process proceeds to S180 and the operation mode is switched. . That is, the operation mode that is currently set is switched to the next operation mode in the switching order described above.

  When the operation mode is switched in S180, the CPU 21 may turn on the LED corresponding to the latest operation mode after the switching among the LEDs of the operation mode display unit 32 of the switch panel 30 for a certain period of time. Good. Thereby, the user can also visually recognize that the operation mode has been switched.

  The operation mode after switching in S180 is stored in the flash memory 24 as the current latest operation mode, and is referred to in the subsequent control of the motor 20. After switching the operation mode in S180, the process returns to S110 again.

On the other hand, if it is determined in the determination process of S120 that 0.7 seconds have passed in the ON state, the light setting is switched. That is, in S130, it is determined whether or not the current light setting is ON. If it is ON, the process proceeds to S140 to switch to the OFF state, and if it is OFF, the process proceeds to S150 to switch to the ON state. The light setting after the switching is also stored in the flash memory 24 as the current latest light setting, and is referred to in the subsequent lighting control of the light 9.

  The CPU 21 may turn on the light 9 for a predetermined time when the light setting is switched in S140 or S150. Specifically, for example, when the light is switched on in S150, the light 9 is turned on for 10 seconds, for example. When the light is switched off in S140, the light 9 is turned on instantaneously. Good. Thereby, the user can also visually recognize that the light setting has been switched.

  After the light setting is switched in S140 or S150, it is determined in S160 whether the setting switch 31 is turned off. Then, the determination process of S160 is repeated while the setting switch 31 is ON, and when it is OFF, the process returns to S110.

  The power tool 1 according to the present embodiment enters a sleep mode in order to suppress the consumption of the battery 16 when the power tool 1 is not used, for example, after a predetermined time has elapsed since the trigger switch 10 is turned off. Only the minimum necessary functions such as the function of detecting the ON state of the trigger switch 10 are effective. For this reason, in the sleep mode, not only the light 9 is turned off, but also all the LEDs in the operation mode display section 32 are turned off. However, when the trigger switch 10 is operated by the user or the like during the sleep mode, the LEDs corresponding to the current battery remaining amount and the current operation mode are displayed on the operation mode display unit 32 and the battery remaining amount display unit 33, respectively. Light. At that time, if the light setting is ON, the light 9 is lit for a certain time (for example, 10 seconds), and if the light setting is OFF, the light 9 is lit for a very short time (for example, instantaneously).

  As described above, in the electric power tool 1 of the present embodiment, the same single setting switch 31 is used for both switching of operation mode settings and light settings. Whether the operation mode or the light setting is switched when the setting switch 31 is operated is distinguished according to the time when the setting switch 31 is ON.

  Therefore, it is possible to save the space for arranging the switch for switching between the operation mode and the light setting, and thereby it is possible to reduce the size of the electric tool 1 and reduce the cost.

  When the setting switch 31 is turned on, if the ON duration is less than the specified time, the operation mode setting is switched. If the ON duration is longer than the specified time, the light setting is switched. Is called. That is, in the operation mode in which the setting switching frequency by the user is high, the ON duration time required for setting switching is set shorter than the light setting. In other words, the user can switch the setting for the operation mode by a short press, and the user can switch the setting for the light setting by a long press. Therefore, the electric tool 1 that is easy to use for the user can be provided.

  In addition, regarding the switching timing of the light setting, when the specified time (0.7 seconds) elapses after the setting switch 31 is turned on, the specified time for the electric tool 1 of the present embodiment is not changed. When the time has elapsed, the light setting is switched. Therefore, the light setting can be switched quickly.

  In addition, there are three types of operation modes: a weak mode, a medium mode, and a strong mode, each having a different maximum rotation speed. Therefore, the user can easily select and set an appropriate rotation speed in accordance with the purpose of use of the electric tool 1, and the electric tool 1 that is more user-friendly for the user can be provided.

  The switch panel 30 is provided on the same surface of the outer surface of the electric power tool 1. Therefore, the user can perform the operation of the setting switch 31 and the display content of each LED on the same surface (toward the same surface).

[Second Embodiment]
Next, the electric power tool of the second embodiment will be described focusing on a different part from the electric power tool 1 of the first embodiment. One of the main components in which the electric power tool of the present embodiment is different from the electric power tool 1 of the first embodiment is the light setting switching timing.

  That is, in this embodiment, the control circuit does not switch the light setting when 0.7 seconds have elapsed since the setting switch 31 was turned on, but when the setting switch 31 is turned OFF after 0.7 seconds have elapsed. The light setting is switched.

  Note that the light setting switching timing is not limited to when the setting switch 31 is turned off, but can be determined as appropriate after the turning off. However, there is a time lag from when the user turns off the setting switch 31 until the light setting is switched, which is not very useful for the convenience of the user. Therefore, it is preferable to switch the light setting when the setting switch 31 is turned off.

  In the present embodiment, the tex mode, which is one of the operation modes, is not one as in the first embodiment, but two types of modes, the first tex mode and the second tex mode, are provided. That is, there are a total of five types of operation modes of the present embodiment: a weak mode, a medium mode, a strong mode, a first tex mode, and a second tex mode. Among these, the weak mode, the medium mode, and the strong mode are the same as those in the first embodiment.

On the other hand, regarding the tex mode, the tightening torque after the seating detection is different between the first tex mode and the second tex mode. That is, before the seating, the tex screw is tightened at the same rotational speed and rotational torque as in the tex mode of the first embodiment. When tightening after seating is detected, in the first tex mode, the rotational speed is slower and the rotational torque is smaller than in the tex mode of the first embodiment. Conversely, in the second tex mode, the rotational speed is faster and the rotational torque is larger than in the first tex mode .

  Also in this embodiment, the operation mode is switched every time the setting switch 31 is turned on for less than 0.7 seconds by the user or the like. The switching order of the operation modes in the present embodiment is in the order of weak mode → medium mode → strong mode → first tex mode → second tex mode → weak mode →. Therefore, as long as the ON duration time is less than 0.7 seconds, the operation mode is switched in the above order every time the setting switch 31 is operated.

  Thus, even in the electric power tool 1 of the present embodiment, the user can press the setting switch 31 for a long time (continues ON for 0.7 seconds or longer) or a short press (continues ON for less than 0.7 seconds). It is possible to freely switch operation modes or light settings. However, the light setting is actually switched when the setting switch 31 is turned off.

  Moreover, since the electric tool of this embodiment differs in the kind of operation mode compared with 1st Embodiment, the structure of a switch panel is also slightly different. In FIG. 6, the switch panel 50 of the electric tool of this embodiment is shown.

As shown in FIG. 6, in the switch panel 50 of the present embodiment, the operation mode display unit 52 that displays the operation mode is configured by five LEDs. Among these, the weak display LED 41, the medium display LED 42, and the strong display LED 43 are the same as those in the first embodiment, but in addition, the first LED that is lit when the operation mode is set to the first tex mode. A text mode display LED 56 and a second text mode display LED 57 that is turned on when the operation mode is set to the second text mode are provided.

  An example of the transition of the operation mode and the light setting in response to the operation of the setting switch 31 is shown in FIG. In the example shown in FIG. 7, at the time immediately before time t1, the operation mode is set to the weak mode and the light setting is set to the OFF state.

  When the setting switch 31 is turned on by the user or the like at time t1 and 0.7 seconds have passed without being turned off, the light setting switching standby state is set. After that, when the setting switch 31 is turned off at time t2 when 1.2 seconds have elapsed since the setting switch 31 was turned on at time t1, the light setting is switched to the ON state.

  The setting switch 31 is turned on again at time t3. If the setting switch 31 is turned off at time t4 after 0.3 seconds without being turned on for 0.7 seconds, the operation is performed when the setting switch 31 is turned off. The mode switches from weak mode to medium mode. Thereafter, the setting switch 31 is turned on again at time t5. However, the setting switch 31 is turned off when the setting switch 31 is turned off at time t6 0.3 seconds later without being turned on again for 0.7 seconds. At this point, the operation mode is switched from the medium mode to the strong mode.

  After that, when the setting switch 31 is turned on for 0.1 second from time t7 to t8, the operation mode is switched from the strong mode to the first tex mode, and then set for 0.1 second from time t9 to t10. When the switch 31 is turned on, the operation mode is switched from the first tex mode to the second tex mode, and further, the setting switch 31 is turned on for 0.2 seconds from time t11 to t12 thereafter. The mode is switched from the second tex mode to the weak mode.

  Then, after the setting switch 31 is turned on again at time t13, when the ON state continues for 0.7 seconds, the light setting switching standby state is set. After that, when the setting switch 31 is turned off at time t14 when one second has elapsed from the turning on of the setting switch 31 at t13, the light setting is switched from the ON state to the OFF state.

  Next, the setting switching control process of this embodiment will be described with reference to FIG. When executing the setting switching control process, the CPU of the present embodiment first determines whether or not the setting switch 31 is turned on in S210. While the setting switch 31 is not turned on, the determination process in S210 is repeated. However, if the setting switch 31 is turned on, it is determined in S220 whether 0.7 second has elapsed in the ON state. . If 0.7 seconds have not elapsed, the process proceeds to S270, where it is determined whether or not the setting switch 31 has been turned off. If not, the process returns to S220. .

  If it is determined in S270 that the setting switch 31 has been turned OFF, the process proceeds to S280, and the operation mode is switched. That is, the operation mode that is currently set is switched to the next operation mode in the switching order described above.

  When the operation mode is switched in S280, the CPU may turn on the LED corresponding to the latest operation mode after the switching among the LEDs of the operation mode display unit 32 of the switch panel 50 for a certain period of time. . Thereby, the user can also visually recognize that the operation mode has been switched.

  The operation mode after switching in S280 is stored in the flash memory 24 as the current latest operation mode, and is referred to in the subsequent control of the motor 20. After switching the operation mode in S280, the process returns to S110 again.

  On the other hand, if it is determined in the determination process in S220 that 0.7 seconds have passed since the switch is turned on, the light setting switching standby state is set. That is, the light setting is switched after the setting switch 31 is turned off.

  Specifically, in S230, it is determined whether or not the setting switch 31 is turned off, and the determination process in S230 is repeated until the setting switch 31 is turned off. When the setting switch 31 is turned off, the light setting is switched. That is, in S240, it is determined whether or not the current light setting is in the ON state. If it is in the ON state, the process proceeds to S250 to switch to the OFF state, and if it is in the OFF state, the process proceeds to S260 to switch to the ON state.

  The light setting after the switching is also stored in the flash memory 24 as the current latest light setting, and is referred to in the subsequent lighting control of the light 9. Also in the present embodiment, when the light setting is switched in S250 or S260, the CPU lights the light 9 for a predetermined time so that the user can visually recognize that the light setting has been switched. May be. After switching the light setting in S250 or S260, the process returns to S210.

  Even in the electric tool of the present embodiment described above, the same setting switch 31 is also used for switching the setting of the operation mode and the switching of the light setting, similarly to the electric tool 1 of the first embodiment. In addition, it is possible to save the space for arranging the switch for switching the light setting, thereby suppressing the increase in the size of the electric tool and reducing the cost.

  Moreover, in this embodiment, it has two types of modes for tex as operation modes from which the rotational torque after seating differs. Therefore, the user can perform tightening of the tex screw with an appropriate rotational torque by appropriately selecting one of the two types of tex mode when performing tightening of the tex screw in the tex mode.

[Modification]
Although the embodiments of the present invention have been described above, the embodiments of the present invention are not limited to the above-described embodiments, and can take various forms as long as they belong to the technical scope of the present invention. Needless to say.

For example, as the plurality of operation modes of the power tool, the four types of operation modes of the first embodiment and the five types of operation modes of the second embodiment are merely examples, and other various operation modes. Of course, it is also possible to constitute an electric tool including

For example, an electric tool having at least a drill mode and a clutch mode can be configured as the plurality of operation modes. That is, the Dorirumo de, while the trigger switch 10 is operated as to rotate the motor 20 in response to the operation amount is the basic mode. On the other hand, in the clutch mode, after the rotation of the motor 20 is started when the trigger switch 10 is turned on, the rotation torque of the motor 20 is detected, and if the detected value is equal to or greater than a preset torque threshold, the trigger switch 10 This is a mode in which the rotation of the motor 20 is stopped even when is operated.

The rotation torque can be detected with a detected current (see FIG. 2) from the motor control unit 13. As is well known, the rotational torque of the motor is proportional to the current flowing through the motor. Therefore, it can be said that the current flowing through the motor is information indirectly indicating the rotational torque of the motor. Therefore, the rotational torque of the motor 20 can be detected based on the detected current from the motor control unit 13, and the clutch mode can be realized based on the detected torque.

  And in the electric tool which has two types of operation modes, such as a drill mode and a clutch mode, the switch panel 60 as shown in FIG. 9 will be provided. The switch panel 60 shown in FIG. 9 differs from the switch panel 30 of the first embodiment shown in FIG. 2 in the configuration of the operation mode display unit 62. Specifically, the operation mode display unit 62 in the switch panel 60 of FIG. 9 includes a drill mode display LED 66 that lights when the operation mode is set to the drill mode, and a case where the operation mode is set to the clutch mode. And a clutch mode display LED 67 that is lit.

  As described above, in the electric tool having the drill mode and the clutch mode, the drill mode and the clutch mode are sequentially switched each time the user or the like presses the setting switch 31 for a short time.

  In the first embodiment, the operation mode setting is described as switching in the order of weak mode → moderate mode → strong mode → text mode → weak mode →... This order is merely an example. is there. The same applies to the switching order of the operation modes in the second embodiment.

  In the above embodiment, it has been described that the light setting is switched by a long press, and the operation mode is switched by a short press, but this is not essential, and conversely, the operation mode is switched by a long press and the light is switched by a short press. You may comprise so that a setting can be switched, respectively.

  In the above-described embodiment, the light setting has been described as being alternately switched between the ON state and the OFF state each time the button is pressed. However, the light setting is only an example. For example, three types of light settings may be sequentially switched: a bright lighting state that brightly shines, a dark lighting state that shines darkly, and an OFF state that does not light. That is, you may comprise so that the illumination intensity of the light 9 can be switched in steps.

  Moreover, you may make it use LED of a different color for each operation mode as each LED for displaying an operation mode. The light 9 may be configured to have a different emission color depending on the operation mode.

  Further, the present invention may be applied not only to a battery-type electric tool such as the electric tool 1 described above, but also to an electric tool that operates by receiving supply of AC power, and a tool element is rotated by an AC motor. You may apply to the electric tool comprised so that it might drive.

  DESCRIPTION OF SYMBOLS 1 ... Electric tool, 2, 3 ... Half housing, 4 ... Handle part, 5 ... Main body housing, 6 ... Battery pack, 7 ... Motor storage part, 8 ... Sleeve, 9 ... Light, 10 ... Trigger switch, 11 ... Controller , 12 ... control circuit, 13 ... motor control unit, 14 ... circuit power supply unit, 15 ... trigger SW detection unit, 16 ... battery, 20 ... motor, 21 ... CPU, 22 ... ROM, 23 ... RAM, 24 ... flash memory, 30, 50, 60 ... switch panel, 31 ... setting switch, 32, 52, 62 ... operation mode display section, 33 ... battery remaining amount display section, 36 ... tex mode display LED 41 ... weak display LED, 42 ... medium display LED 43 ... Strong display LED, 56 ... First tex mode display LED, 57 ... Second tex mode display LED, 66 ... Drill mode display LED, 67 Clutch mode display LED

Claims (2)

A power tool having a plurality of operation modes,
A motor for generating a rotational driving force for driving the tool element;
A striking mechanism capable of imparting intermittent striking in the rotational direction to the tool element based on the rotational driving force of the motor;
With
As the operation mode, three kinds of speed setting modes having different maximum rotation speeds of the motor, and the maximum rotation speed of the motor are different before and after the screw to be tightened, and are lower after the seating than before the seating. With a set speed change mode,
The speed setting mode includes a weak mode with the lowest maximum rotation speed, a strong mode with the highest maximum rotation speed, and a medium mode with the maximum rotation speed higher than the weak mode and lower than the strong mode. Is set,
Furthermore,
A setting switch that is turned on and off to switch the setting of the operation mode;
A first display unit for displaying when the operation mode is set to any one of the three types of speed setting modes;
A second display unit for displaying when the operation mode is set to the speed change mode;
A display control unit for controlling the first display unit and the second display unit according to the operation mode set by the setting switch;
With
The first display unit includes a first LED, a second LED, and a third LED,
The second display unit includes a fourth LED,
The display control unit turns on the first LED when the operation mode is set to the weak mode, and turns on the first LED when the operation mode is set to the medium mode. The second LED is turned on, and when the operation mode is set to the strong mode, the first LED, the second LED, and the third LED are turned on, and the operation mode changes the speed change. When the mode is set, the first LED, the second LED, and the third LED are all turned off and the fourth LED is turned on,
The shape of the region that emits light using the fourth LED as a light source when the fourth LED is turned on in the second display section is the first shape when the first LED is turned on in the first display section. The shape of the region that emits light using the LED as the light source, the shape of the region that emits light using the second LED as the light source when the second LED is turned on, and the third LED as the light source when the third LED is turned on Unlike any shape of the light emitting area,
The power tool, wherein the setting switch, the first display unit, and the second display unit are provided on the same surface among the surfaces exposed to the outside of the power tool. The electric tool according to claim 1,
In the first display unit, a shape of a region that emits light using the first LED as a light source, a shape of a region that emits light using the second LED as a light source, and a shape of a region that emits light using the third LED as a light source Are all the same kind of figure shape .