WO2011096363A1 - Electric tool and program - Google Patents

Abstract

An electric tool is provided with an information generation means, a storage means, an operation detection means, an information reading means, and a report means. The information generation means monitors the state of the electric tool and generates tool information that is information relating to the state of the electric tool on the basis of the result of the monitoring. The storage means stores the tool information generated by the information generation means. The information reading means reads the tool information stored in the storage means from the storage means when a specific operation is detected by the operation detection means. The report means reports the contents of the tool information read by the information reading means.

Description

Electric tool and program Cross-reference of related applications

This international application claims priority based on Japanese Patent Application No. 2010-024305 filed with the Japan Patent Office on February 5, 2010, and is based on Japanese Patent Application No. 2010-024305. The entire contents are incorporated herein by reference.

The present invention relates to an electric tool.

One type of electric power tool includes a storage device such as an electrically rewritable nonvolatile memory (see, for example, Patent Document 1).
In the storage device in the electric tool described in Patent Document 1, information on the state of the electric tool, such as the temperature of the electric tool, the usage time of the electric tool, the number of uses of the electric tool (hereinafter referred to as tool information). Is memorized.

In the electric tool described in Patent Document 1, the tool information stored in the storage device is read out by a dedicated reading device provided separately from the electric tool and acquired by the reading device. The tool information acquired by the reader is analyzed by a computer provided separately from the power tool, and is recognized by an inspector who checks the tool information.

JP 2000-32678 A

As described above, in the power tool described in Patent Document 1, a dedicated reader must be used to acquire tool information from the power tool.
Furthermore, in order for an inspector or the like to recognize the contents of the tool information acquired by the reading device, it must be analyzed using a computer provided separately from the power tool.

For this reason, in the electric power tool described in Patent Literature 1, there is a problem that an inspector or the like needs a lot of labor to acquire tool information from the electric power tool and recognize the contents of the tool information.
Then, an object of this invention is to provide the technique which can make an inspector of an electric tool recognize easily the information memorize | stored in the electric tool in view of the said problem.

The power tool according to the first aspect of the present invention made to achieve the above object includes information generating means, storage means, operation detecting means, information reading means, and notification means.
The information generating unit monitors the state of the electric tool, generates tool information that is information related to the state of the electric tool based on the monitoring result, and the storage unit stores the tool information generated by the information generating unit. The operation detecting means detects a predetermined specific operation applied to the electric tool for reading out the tool information, and the information reading means is stored in the storage means when the specific operation is detected by the operation detecting means. Tool information is read from the storage means. The notifying means notifies the contents of the tool information read by the information reading means.

That is, according to the electric tool of the first aspect, the reading of the tool information stored in the storage means and the notification of the read tool information are performed using a reading device or a computer provided separately from the electric tool. Without the power tool itself.

Therefore, according to the electric tool of the first aspect, the tool information stored in the electric tool can be easily transmitted to the inspector of the electric tool without using a device provided separately from the electric tool. Can be recognized.

The specific operation may be applied to any part of the power tool. For example, the power tool may include at least one switch, and a specific operation may be applied to the at least one switch.

In this case, the tool information stored in the power tool can be easily recognized by the inspector of the power tool by simply performing a specific operation on at least one switch.
Only a specific operation may be applied to the at least one switch. In addition to the specific operation, an operation for operating the electric tool other than the specific operation and an electric tool other than the specific operation may be set. At least one of operations may also be added.

When at least one of an operation for operating the electric tool other than the specific operation and an operation for setting the electric tool other than the specific operation is added to the at least one switch in addition to the specific operation Since it is not necessary to separately provide the power tool with a switch for applying a specific operation and a switch for performing operation and setting of the power tool, the configuration of the power tool can be simplified.

The “operation for operating the electric tool” includes at least an on / off operation of a switch for operating the rotation of the motor.
The “operation for setting the power tool” means an operation for setting the rotation direction of the motor, an operation for setting lighting on / off, and an upper limit (maximum rotation speed) of the motor rotation speed. At least one of an operation for setting, an operation for setting ON / OFF of the display of the remaining capacity of the battery, and an operation for setting the mode of operation of the motor so as to fasten the screw to a predetermined torque Is included. Note that the mode in which the motor is operated so that the screw is tightened to the specified torque may be a mode in which the motor is driven to rotate the motor by a predetermined amount in the direction in which the screw is tightened even after the specified torque is detected. Alternatively, the motor may be driven so as to stop the rotation of the motor when a predetermined torque is detected even once.

Further, at least one switch may function only as a switch to which a specific operation is applied, or functions as a switch to which another operation other than the specific operation is added in addition to functioning as a switch to which a specific operation is applied. May be.

In addition to functioning as a switch to which a specific operation is added, when at least one switch functions as a switch to which another operation other than the specific operation is applied, a switch for adding the specific operation and another switch other than the specific operation It is not necessary to separately provide the power tool with a switch for applying the above operation, and the configuration of the power tool can be simplified.

The specific operation may be an operation applied to at least one switch in a predetermined operation pattern.
If the specific operation is set in this way, only a person who recognizes the content of the specific operation can read and recognize the tool information by operating at least one switch with a predetermined operation pattern. Can do. That is, it is possible to prevent a general user of an electric power tool who has not recognized the content of the operation pattern defined as the specific operation from reading the tool information and recognizing the content of the read tool information.

However, the “predetermined operation pattern” may be any operation pattern, but is less likely to be applied to at least one switch when performing work using the electric tool. It should be an operation pattern.

If the operation pattern is set in this way, it is possible to prevent the tool information from being erroneously notified when the user of the power tool is working using the power tool.

Specifically, for example, during a specified time (here, a few seconds), the switch is repeatedly turned on / off more than the set number of times, or the switch is pressed longer than the normal switch operation. Also good. Further, when a plurality of switches having different functions are installed in the electric tool, an operation of pressing the plurality of switches having different functions in a predetermined order and number of times within a few seconds may be performed.

By the way, as one of the situations where electric tools are used, a construction site where a house is built is assumed. The power tools used in this assumed construction site include the locking of the rotor of the motor, a decrease in battery voltage, and a rise in the temperature of the motor and switching elements. There is a case where a specific state defined in advance for the state occurs. In this way, when the power tool user himself / herself cannot resolve the specific state that occurred when using the power tool, the user of the power tool must contact the power tool dealer or service center. Bring an electric tool. In order to confirm the specific state that occurred earlier (that is, during use) with respect to the brought-in electric tool, an inspector performs an inspection or the like at a dealer or a service center of the electric tool. In the case of this inspection, if the specific state that has occurred first continues or if the specific state that has occurred first can be reproduced, the contents of the specific state that has occurred first can be easily specified.

However, the specific state that occurs in the power tool is not limited to something that can be continued after the specific state occurs or that can be reproduced during inspection. For this reason, the tool information stored in the storage means of the electric tool may be the content of the specific state that occurs when the electric tool is used.

For this reason, the information generation means may be configured to monitor the occurrence of a specific state defined in advance and generate the content of the generated specific state as tool information.
According to the electric tool configured in this way, an inspector of the electric tool can easily recognize the contents of the specific state generated in the electric tool. However, the inspector here is mainly a salesclerk of the power tool sales shop or an employee of the service center.

When the electric tool includes a display unit for displaying information, the notification unit may notify the content of the tool information by causing the display unit to display the content of the tool information.
In this case, an inspector or the like of the electric tool can easily recognize the contents of the tool information through the display on the display means.

In addition to the tool information, information other than the tool information may be displayed on the display means.
In this case, the display unit functions as a display unit for displaying tool information, and also functions as a display unit for displaying information other than the tool information. That is, it is not necessary to separately provide a display means for displaying tool information and a display means for displaying other information in the electric tool, and the configuration of the electric tool can be simplified.

When the display unit includes at least one light-emitting device, the notification unit performs at least driving the at least one light-emitting device in a pattern previously associated with the content of the tool information, You may alert | report the content of tool information.

In this case, the content of the tool information can be notified using at least one light emitting device provided in the electric tool.
The electric power tool of the present invention may be configured to be able to determine whether the tool information notified by the notification means is already notified tool information or newly notified tool information.

That is, for example, when the tool information indicates the contents of a specific state that is defined in advance and can be generated in the electric tool, whether or not the tool information notified by the notification means is already notified tool information is newly notified. If it is difficult to determine whether it is tool information, even if the specific state has already been resolved, if the specific state has not been resolved, there is a possibility that the inspector of the electric tool may mistakenly recognize it. It is.

Therefore, the power tool of the present invention may include a rereading suppression unit that suppresses the tool information read by the information reading unit from being read again by the information reading unit.
According to the electric tool configured as described above, since the read tool information is suppressed from being read again, it is possible to prevent the tool information once notified from being notified again.

The re-reading suppression unit may be configured in any way for suppressing the tool information read by the information reading unit from being read again by the information reading unit.
For example, the re-reading suppressing unit deletes the tool information read by the information reading unit from the storage unit, thereby suppressing the tool information read by the information reading unit from being read again by the information reading unit. It is good to be configured to do so.

In this case, it is possible to reliably prevent the tool information once read out from being read out and notified again.
When the power tool includes a motor that is supplied with power from the power source and drives the tool unit, and a control unit that controls the operation of the power tool including power supply from the power source to the motor, the information generation unit May monitor the state of at least one of the drive source and the control unit, and generate tool information based on the monitoring result.

In other words, by monitoring the state of at least one of the drive source and the control unit and generating tool information, it is possible to easily determine the cause when a problem occurs in at least one of the drive source and the control unit. Can be analyzed.

Next, a program according to a second aspect of the present invention provides a computer provided in an electric tool including storage means for storing information and notification means for notifying the content of information read from the storage means. Information generating means for monitoring the state and generating tool information which is information relating to the state of the electric tool based on the monitoring result; an operation detecting means for detecting a predetermined specific operation applied to the electric tool; When the operation detecting means detects that an operation has been applied to the power tool, the information reading means for reading out the tool information stored in the storage means from the storage means, and the tool read by the information reading means It functions as an informing means for informing the contents of information.

According to this program, the computer can function as information generation means, operation detection means, information reading means, and notification means in the electric power tool of the first aspect.
Here, the above-described computer may be a well-known computer or a computer suitably configured for an electric power tool.

In addition, the above-described program may be stored in a ROM or backup RAM incorporated in a computer and loaded from the ROM or backup RAM into the computer, or may be loaded into the computer via a network and used. Good.

Further, the above-described program may be used by being recorded on a computer-readable recording medium. Examples of the recording medium include a portable semiconductor memory (for example, a USB memory, a memory card (registered trademark), etc.).

It is a perspective view which shows the external appearance of the electric tool to which this invention was applied. It is a block diagram which shows the electric constitution of an electric tool. It is a flowchart which shows the flow of the drive process which the microcomputer of an electric tool performs. It is a flowchart which shows the flow of the drive determination process which the microcomputer of an electric tool performs. It is a flowchart which shows the flow of the specific operation determination process which the microcomputer of an electric tool performs. It is a flowchart which shows the flow of the error confirmation process which the microcomputer of an electric tool performs. It is a flowchart which shows the flow of the error content display process which the microcomputer of an electric tool performs.

DESCRIPTION OF SYMBOLS 1 ... Electric tool 2 ... Half housing 4 ... Handle part 5 ... Main body housing 6 ... Battery pack 7 ... Motor storage part 8 ... Chuck sleeve 10 ... Trigger SW 12 ... Bridge circuit 14 ... Microcomputer 16 ... Memory 20 ... Motor 21- 26 ... Gate circuit 40 ... Position detection unit 52 ... Forward / reverse switching SW 54 ... Illumination SW 56 ... Speed mode switching SW 58 ... Torque mode switching SW 60 ... Remaining capacity display SW 80 ... Temperature sensor 62 ... Illumination unit 64 ... High speed mode display Section 66 ... Medium speed mode display section 68 ... Low speed mode display section 70, 72, 74 ... Remaining capacity display section 90 ... Torque sensor 162 ... Illumination LED 164 ... High speed mode LED 166 ... Medium speed mode LED 168 ... Low speed mode LED 170, 172, 174 ... Remaining capacity LE Q1 ~ 6 ... the switching element.

Embodiments of the present invention will be described below with reference to the drawings.
<Mechanical configuration of electric tool>
As shown in FIG. 1, the power tool 1 of the present embodiment is configured as a so-called impact driver, and includes a main body housing 5, a handle portion 4, 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 motor that houses a motor 20 (see FIG. 2) serving as a power source of the electric tool 1 behind the main body housing 5. A storage unit 7 is provided.

On the other hand, the front end of the main body housing 5 is provided with a chuck sleeve 8 for detachably mounting various tool bits (not shown) functioning as, for example, a plus driver, a minus driver, or a drill. Yes. A transmission mechanism (for example, a speed reduction mechanism or a striking mechanism) for transmitting the power of the motor 20 to the chuck sleeve 8 is housed between the motor housing portion 7 and the chuck sleeve 8.

The handle portion 4 is a portion that is gripped by the user of the electric power tool 1 and extends below the main body housing 5. The handle portion 4 is provided with a trigger switch 10 for the user of the electric power tool 1 to operate the rotation of the motor 20 and the rotation of the tool bit attached to the chuck sleeve 8. Hereinafter, the switch is also expressed as SW.

An illumination unit 62 for irradiating light in the direction of the tip of the tool bit is provided above the trigger SW 10.
Furthermore, a high speed mode display section 64, a medium speed mode display section 66, a low speed mode display section 68, and remaining capacity display sections 70, 72, and 74 are provided at the lower end of the handle section 4.

The high-speed mode display unit 64 is lit when the maximum rotation speed of the rotor of the motor when the trigger SW 10 is pulled to the maximum is set to the high-speed mode.
The medium speed mode display unit 66 is lit when the maximum rotation speed of the rotor of the motor when the trigger SW 10 is pulled to the maximum is set to the high speed mode and the medium speed mode.

The low speed mode display unit 68 is lit when the maximum rotation speed of the rotor of the motor 20 is set to the low speed mode, the medium speed mode, and the high speed mode when the trigger SW 10 is pulled to the maximum.

The remaining capacity display unit 70 is turned on when the remaining capacity of the battery pack 6 has reached a preset high level.
The remaining capacity display portion 72 is turned on when the remaining capacity of the battery pack 6 has reached a preset intermediate level.

The remaining capacity display portion 74 is lit when the remaining capacity of the battery pack 6 has not reached the middle level.
The battery pack 6 is detachably attached to the lower end of the handle portion 4. The battery pack 6 includes a rechargeable secondary battery inside the battery pack 6.
<Electric configuration of power tool>
As shown in FIG. 2, the motor 20 in the present embodiment is a well-known three-phase brushless motor, and current is sequentially supplied to the coils corresponding to the phases U, V, and W in the motor 20, respectively. A rotor (not shown) in the motor 20 rotates. The motor 20 is provided with a position detection unit 40 for detecting the rotation position (rotation angle) of the rotor of the motor 20. In addition, the position detection part 40 in this embodiment is comprised by several Hall IC etc. which were installed in the stator which the motor 20 does not illustrate for every predetermined angle, for example. Each Hall IC includes a well-known Hall element, and the logic level of the voltage in the output signal from each Hall IC is changed from a low level to a high level or from a high level to a low level each time the rotor of the motor 20 rotates by a specified angle. It changes to binary. Hereinafter, the signal output from the position detector 40 is also referred to as a rotation signal or a hall signal.

In addition, each coil corresponding to each phase of the motor 20 (ie, U, V, W phase) is connected to the battery pack 6 via the bridge circuit 12.
The bridge circuit 12 is configured to be able to drive the rotor of the motor 20 in either the forward direction or the reverse direction. The normal rotation direction here is a direction in which the tool bit is rotated in a direction in which a general screw is fastened. On the other hand, the reverse rotation direction is the reverse rotation direction, which is the rotation direction in which general screw fastening is released.

More specifically, the bridge circuit 12 is a known three-phase bridge circuit including six switching elements Q1 to Q6. In this bridge circuit 12, between the positive electrode and the negative electrode of the battery pack 6, a set of switching elements Q1, Q4 connected in series, a set of switching elements Q2, Q5 connected in series, and a switching element connected in series A set of Q3 and Q6 is connected in parallel to each other. And between each switching element in each group, each coil corresponding to each phase U, V, W in the motor 20 is connected. In the present embodiment, the switching elements Q1 to Q6 are well-known FETs.

Furthermore, gate circuits 21 to 26 are connected to the switching elements Q1 to Q6 of the bridge circuit 12. The gate circuits 21 to 26 apply switching signals Q1 to Q6 by applying a PWM signal having a voltage equal to or higher than a threshold voltage necessary for turning on the switching elements Q1 to Q6 between the gates and sources of the switching elements Q1 to Q6. Turn on and off. That is, in the bridge circuit 12, as the duty ratio of the PWM signal applied between the gate and source of the switching elements Q1 to Q6 is larger, the magnitude of the current flowing through each coil corresponding to each phase U, V, W is larger. Become. In other words, the rotational speed of the rotor of the motor 20 increases as the duty ratio of the PWM signal increases. The rotation speed may be defined in any way, for example, may be defined as the number of rotations the rotor rotates per unit time (for example, 1 minute), or may be defined as the angular speed of the rotor. Also good.

Each of the gate circuits 21 to 26 is connected to the positive electrode side of the battery pack 6 through a power supply path common to the respective gate circuits, while being connected to the microcomputer 14 and a drive signal input from the microcomputer 14. Controlled by.

The microcomputer 14 includes at least a memory 16, an I / O (not shown), and the like, and a control voltage Vcc generated by stepping down an output voltage (for example, 36 VDC) from the battery pack 6 to a predetermined voltage (for example, 5 VDC). It operates by being applied.

The microcomputer 14 includes a trigger SW 10, a forward / reverse switching SW 52, an illumination SW 54, a speed mode switching SW 56, a torque mode switching SW 58, a remaining capacity display SW 60, a temperature sensor 80, a torque sensor 90, and an illumination LED 162. The high-speed mode LED 164, the medium-speed mode LED 166, the low-speed mode LED 168, and the remaining capacity LEDs 170, 172, and 174 are connected.

The trigger SW 10 is a switch operated by the user of the electric power tool 1 as described above. The trigger SW10 includes a voltage indicating whether the trigger SW10 is turned on / off (indicating whether the trigger SW10 is pulled) and a voltage indicating the operation amount of the trigger SW10 (the amount by which the trigger SW10 is pulled). The data is output from the trigger SW 10 to the microcomputer 14.

The forward / reverse switching SW 52 is a switch operated by the user of the electric power tool 1 in order to define the rotation direction of the rotor of the motor 20 as either the forward rotation direction or the reverse rotation direction. The corresponding voltage is output from the forward / reverse switching SW 52 to the microcomputer 14.

The illumination SW 54 is a switch that is turned on / off by the user of the power tool 1 to turn on / off (turn on and off) the illumination unit 62, and a voltage indicating whether the illumination SW 54 is turned on is It is output from the illumination SW 54 to the microcomputer 14.

The speed mode switching SW 56 is for the user of the electric power tool 1 to set the maximum rotational speed of the rotor of the motor 20 to one of high speed, medium speed, and low speed when the trigger SW 10 is pulled to the maximum. A voltage indicating whether or not the speed mode switching SW 56 is turned on is output from the speed mode switching SW 56 to the microcomputer 14. Each time the speed mode switching SW 56 is turned on, the microcomputer 14 switches the maximum rotation speed of the rotor of the motor 20 in the order of low speed, medium speed, and high speed. When the speed mode switch SW56 is turned on while the maximum rotation speed of the rotor of the motor 20 is set to high speed, the microcomputer 14 sets the maximum rotation speed to low speed again, and then the speed mode switch SW56. Each time is turned on, the maximum rotation speed is set in the order of medium speed and high speed.

The torque mode switching SW 58 is a switch for the user of the electric tool 1 to set the mode of operation of the motor 20 related to the screw fastening torque, and a voltage indicating whether or not the torque mode switching SW 58 is turned on. The torque mode switching SW 58 outputs the microcomputer 14. In the present embodiment, the microcomputer 14 sets the operation mode of the motor 20 to the normal mode in the initial state of the electric power tool 1, and tightens the screw until the screw stops rotating while the trigger SW 10 is on. Then, the motor 20 is driven. When the torque mode switch SW58 is turned on, the microcomputer 14 detects the specified torque by fastening the screw to the specified torque based on the voltage input from the torque sensor 90 while the trigger SW10 is turned on. Then, the motor 20 is driven so that the motor 20 is further rotated by a predetermined amount in the direction in which the screw is fastened. When the torque mode switching SW 58 is turned on once more, the microcomputer 14 detects the prescribed torque by fastening the screw to the prescribed torque based on the voltage input from the torque sensor 90 while the trigger SW 10 is turned on. Then, the motor 20 is driven so as to stop the motor 20. When the torque mode switching SW 58 is turned on again,
The microcomputer 14 returns the mode of operation of the motor 20 to the normal mode.

The temperature sensor 80 detects the temperature around the temperature sensor 80, and a voltage corresponding to the detected temperature is output from the temperature sensor 80 to the microcomputer 14. In the present embodiment, the temperature sensor 80 is disposed in the vicinity of the motor 20 in order to detect the temperature of the motor 20.

The remaining capacity display SW60 is a switch for the user of the electric tool 1 to display the remaining capacity of the battery pack 6 on the electric tool 1, and the voltage indicating whether or not the remaining capacity display SW60 is turned on Output from the remaining capacity display SW 60 to the microcomputer 14.

The torque sensor 90 detects the magnitude of torque applied to the rotor of the motor 20, and a voltage indicating the detected magnitude of torque is output from the torque sensor 90 to the microcomputer 14.

The illumination LED 162 is an LED that functions as the light source of the illumination unit 62 described above, and is turned on or off according to a command from the microcomputer 14.
The high-speed mode LED 164 is an LED that functions as a light source of the high-speed mode display unit 64 described above, and is turned on or off according to a command from the microcomputer 14.

The medium speed mode LED 166 is an LED that functions as a light source of the above-described medium speed mode display unit 66, and is turned on or off according to a command from the microcomputer 14.
The low-speed mode LED 168 is an LED that functions as a light source of the low-speed mode display unit 68 described above, and is turned on or off according to a command from the microcomputer 14.

The remaining capacity LED 170 is an LED that functions as a light source of the above-described remaining capacity display unit 70, and is turned on or off according to a command from the microcomputer 14.
The remaining capacity LED 172 is an LED that functions as a light source of the above-described remaining capacity display unit 72, and is turned on or off according to a command from the microcomputer 14.

The remaining capacity LED 174 is an LED that functions as a light source of the above-described remaining capacity display unit 74, and is turned on or off according to a command from the microcomputer 14.
Further, the hall signal output from the position detection unit 40 is input to the microcomputer 14. Further, a battery voltage signal indicating a voltage (battery voltage) output from the battery pack 6 is input from the battery pack 6 to the microcomputer 14 via a path (not shown).

The memory 16 of the microcomputer 14 includes a RAM, a ROM, and an electrically rewritable nonvolatile memory (for example, a flash memory or an EEPROM). The memory 16 stores various processing programs executed by the microcomputer 14 including drive processing described later.

In this driving process, when the trigger SW 10 is turned on, the microcomputer 14 causes a current to flow through the coil of the motor 20 and detects a specific state that can occur in the electric power tool 1. The content of the detected specific state is notified. In the present embodiment, the disconnection of the wiring from the battery pack 6 to the motor 20, the decrease in the battery voltage, the high temperature state of the motor 20, the lock of the rotor of the motor 20, etc. are defined as specific states. It may be defined as a specific state.

The memory 16 stores the contents of the specific state detected as the microcomputer 14 executes the driving process as the specific state information.
In the memory 16, the non-volatile memory is allocated to the storage area for storing the specific state information. In this embodiment, the specific state information is directed from the head address allocated to the non-volatile memory toward the final address. Are sequentially stored in time series. However, the storage destination of the specific state information is not assigned in order from the first address to the last address, but may be assigned in other order.
<Details of drive processing>
Next, drive processing executed by the microcomputer 14 will be described.

This driving process is started when power is supplied to the microcomputer 14 of the electric power tool 1 and the microcomputer 14 is activated.
As shown in FIG. 3, first, in S110, it is determined whether or not the confirmation flag is set (for example, whether or not the bit in the storage area for the confirmation flag secured in the memory 16 is 1). Note that this confirmation flag indicates whether or not a predetermined specific operation has been applied to the electric power tool 1. In this embodiment, if the confirmation flag is set, the electric power tool 1 is assigned to the electric power tool 1. Indicates that a specific operation has been added.

In S110, when the confirmation flag is set (for example, when the bit indicating the confirmation flag is 1) (S110: YES), it is determined that the specific operation is applied to the electric power tool 1, and the process proceeds to S120. Then, an error confirmation process described later is executed. When the process of S120 ends, the process returns to S110.

On the other hand, in S110, when the confirmation flag is not set (for example, when the bit indicating the confirmation flag is 0) (S110: NO), it is determined that the specific operation is not applied to the electric power tool 1. , The process proceeds to S130.

In the SW detection process of S130, the operation states of various switches installed in the electric tool 1 such as the trigger SW10, the forward / reverse switching SW52, the illumination SW54, the speed mode switching SW56, the torque mode switching SW58, the remaining capacity display SW60, and the like. The detection is performed based on the above-described voltages output from these switches, and the operation states of these switches are stored in the memory 16. In the present embodiment, the RAM in the memory 16 is allocated to a storage area for storing the operation state of these switches. More specifically, for example, when it is detected that any of these switches has been operated, the bit associated with the operated switch is set to 1. When this SW detection process ends, the process proceeds to S140.

In the state detection process of S140, the logic level (that is, high level or low level) of the voltage in the Hall signal input from the position detection unit 40, the value of the battery voltage input from the battery pack 6, and the temperature sensor 80 The value of the input voltage is stored in the memory 16. In the present embodiment, the RAM in the memory 16 is allocated to the storage area. When this state detection process ends, the process proceeds to S150.

In S150, a drive determination process described later is executed, and when the drive determination process ends, the process proceeds to S160.
In the LED display processing in S160, among the various switches stored in the memory 16 in S130, the bit associated with the illumination SW 54, the bit associated with the speed mode switching SW 56, and the remaining capacity display SW 60 are associated. The corresponding LED is turned on or off based on the received bit and the value of the battery voltage stored in the memory 16 in S140. More specifically, for example, the illumination LED 162 is turned on or off according to the bit associated with the illumination SW 54, and the high-speed mode LED 164 and the medium-speed mode are activated according to the bit associated with the speed mode switching SW 56. Either one of the LED 166 and the low-speed mode LED 168 is turned on, or the remaining capacity LEDs 170, 172, and 174 are turned on or off based on the value of the battery voltage in accordance with the bit associated with the remaining capacity display SW60. Turns off. Note that the high-speed mode LED 164, the medium-speed mode LED 166, and the low-speed mode LED 168 are turned on and off, and the state of the bit associated with the speed mode switching SW 56 referred to in S160 executed last time is executed this time. The process is executed in accordance with the change in the state of the bit associated with the speed mode switching SW 56 referred to in S160. When this LED display process ends, the process proceeds to S170.

In S170, the specific operation determination process described later is executed, and when this specific operation determination process ends, the process returns to S110.
<Details of drive judgment processing>
As shown in FIG. 4, in the drive determination process, first, in S210, whether or not the notification flag is set (for example, whether or not the bit in the storage area for the notification flag secured in the memory 16 is 1). Or not). The notification flag is a flag that indicates whether or not a specific state that may occur in the electric power tool 1 during use of the electric power tool 1 is detected (that is, specific state information is generated). In the present embodiment, if the notification flag is set, it indicates that a specific state has been detected. In the present embodiment, since the RAM in the memory 16 is assigned to the storage area for the notification flag, the notification flag is canceled each time the power of the electric tool 1 is turned off (for example, for the notification flag). Bit in storage area is set to 0).

In S210, if the notification flag is set (S210: YES), the driving determination is terminated. If the notification flag is not set (S210: NO), the process proceeds to S220. The following determinations in S220, S240, S260, and S280 are made based on the detection result of the specific state in S140 of FIG.

In S220, it is determined whether or not the rotation signal (Hall signal) output from the Hall IC of the position detection unit 40 is normal. In this embodiment, the logic level of the voltage in the Hall signal is abnormal, or the change in the logic level of the voltage in the Hall signal referenced between S220 executed a predetermined number of times and S220 executed this time is the motor. If the pattern is different from the normal 20 rotation pattern, the hall signal is determined to be abnormal. For example, if the wiring around the motor 20 (for example, around the position detection unit 40) is disconnected, the Hall signal becomes abnormal. Therefore, in this embodiment, when it is determined in S220 that the Hall signal is abnormal (S220: NO), the process proceeds to S230, and the specific state information indicating the occurrence of disconnection in a predetermined storage area in the memory 16 is displayed. The predetermined code is stored, and the process proceeds to S300. When the specific state information is stored in a predetermined storage area (in this embodiment, the non-volatile memory in the memory 16) in S230 and the following S250, S270, and S290, the address indicating the storage area in which the specific state information is stored is For example, it is incremented by 1 and updated.

If it is determined in S220 that the Hall signal is normal (S220: YES), the process proceeds to S240, and in S240, it is determined whether or not the value of the battery voltage has decreased below a predetermined value. If the value of the battery voltage has decreased below the predetermined value (S240: YES), the process proceeds to S250, where a predetermined code of specific state information indicating that the battery voltage has decreased is stored in the memory 16, and the process proceeds to S300. Transition.

If it is determined in S240 that the value of the battery voltage has not decreased to a predetermined value or less (S240: NO), the process proceeds to S260, and in S260, the temperature of the motor 20 (hereinafter referred to as the motor temperature) becomes the predetermined temperature. It is determined whether or not the temperature is higher. When the motor temperature is high (S260: YES), the process proceeds to S270. In S270, the predetermined code of the specific state information indicating that the motor 20 is high temperature is stored in the memory 16, and the process proceeds to S300.

If it is determined in S260 that the motor temperature is not high (S260: NO), the process proceeds to S280, and in S280, it is determined whether or not the rotor of the motor 20 is locked. More specifically, for example, the rotor of the motor 20 is locked by the logic of the voltage in the Hall signal during a predetermined number of times S280 to the current S280, even though the trigger SW10 is pulled. It is determined that When the rotor of the motor 20 is locked (S280: YES), the process proceeds to S290. In S290, a predetermined code of specific state information indicating that the rotor of the motor 20 is locked is stored in the memory 16. , The process proceeds to S300.

In S300, a notification flag indicating that some specific state has occurred in the electric power tool 1 is set (for example, a bit in a storage area for the notification flag secured in the memory 16 is set to 1), and the main drive determination is performed. The process ends.

In S280, if it is determined that the rotor of the motor 20 is not locked (S280: NO), it is determined that no specific state has occurred in the power tool 1, and the process proceeds to S310.

In S310, it is determined whether or not the trigger SW10 is pulled. If the trigger SW10 is pulled (S310: YES), the process proceeds to S320. In S320, the operation according to the operation state of the torque mode switching SW58 is determined. In an operation mode, a motor driving process for driving the motor 20 is executed so that the rotor of the motor 20 rotates at a rotational speed corresponding to the pulling amount of the trigger SW10. Then, when the motor driving process ends, the main driving determination process ends.

In S310, when the trigger SW10 is not pulled (S310: NO), the process proceeds to S330, and a brake process for stopping the motor 20 is executed. Then, when the brake process ends, the main drive determination process ends.
<Details of specific operation determination processing>
As shown in FIG. 5, in the specific operation determination process, first, in S510, it is determined whether or not the elapsed time since the trigger SW 10 is turned off is within a predetermined time (for example, 5 seconds). If it is determined that the elapsed time exceeds the predetermined time (S510: NO), it is determined that the specific operation has not been applied to the power tool 1, and the specific operation determination process is terminated.

If it is determined in S510 that the elapsed time is within the predetermined time (S510: YES), the process proceeds to S520, and in S520, it is determined whether the forward / reverse switching SW 52 has been operated a predetermined number of times (for example, 5 times). If the forward / reverse switching SW 52 has not been operated a predetermined number of times (S520: NO), it is determined that the specific operation has not been applied to the power tool 1, and the specific operation determination process is terminated.

If it is determined in S520 that the forward / reverse switching SW 52 has been operated a predetermined number of times (S520: YES), the process proceeds to S530, and in S530, it is determined whether or not the speed mode switching SW 56 has been operated a predetermined number of times (for example, 5 times). When the speed mode switching SW 56 has not been operated a predetermined number of times (S530: NO), it is determined that the specific operation has not been applied to the electric power tool 1, and the specific operation determination process ends.

If it is determined in S530 that the speed mode switching SW 56 has been operated a predetermined number of times (S530: YES), the process proceeds to S540, and in S540, it is determined whether or not the illumination SW 54 has been operated a predetermined number of times (for example, 5 times). When the illumination SW 54 has not been operated a predetermined number of times (S540: NO), it is determined that the specific operation has not been applied to the power tool 1, and the specific operation determination process is terminated.

If it is determined in S540 that the illumination SW 54 has been operated a predetermined number of times (S540: YES), the process proceeds to S550, and in S550, it is determined whether or not the torque mode switching SW 58 has been operated a predetermined number of times (for example, 5 times). When the torque mode switching SW 58 has not been operated a predetermined number of times (S550: NO), it is determined that the specific operation has not been applied to the electric power tool 1, and the specific operation determination process ends.

If it is determined in S550 that the torque mode switching SW 58 has been operated a predetermined number of times (S550: YES), the process proceeds to S560, and in S560, it is determined whether or not the remaining capacity display SW 60 has been operated a predetermined number of times (for example, five times). When the remaining capacity display SW 60 has not been operated a predetermined number of times (S560: NO), it is determined that the specific operation has not been applied to the electric power tool 1, and the specific operation determination process ends.

If it is determined in S560 that the remaining capacity display SW60 has been operated a predetermined number of times (S560: YES), it is determined that a specific operation has been applied to the electric power tool 1. In this case, the process proceeds to S570, and a confirmation flag is set in S570. As described above, when the confirmation flag is set, it indicates that the specific operation has been applied to the electric power tool 1.

In the next S580, the address at the end of the storage area of the memory 16 storing the specific state information is incremented by 1 and set as a confirmation address, and the specific operation determination process is terminated. Note that the confirmation address may or may not be stored in the memory 16.
<Details of error confirmation processing>
Here, the details of the error confirmation process executed in S120 described above will be described.

This error confirmation process is a process for reading and notifying the specific state information stored in the memory 16. For example, the user of the electric tool 1 indicates the occurrence of the specific state while using the electric tool 1. When the power tool 1 is brought into the agency by recognizing by lighting up, the inspector of the power tool 1 at the agency confirms the error content of the power tool 1.

As shown in FIG. 6, in this error confirmation process, first, in S710, it is determined whether or not the LED display time, which is a predetermined fixed time for turning on the LED and continuing to display the error content, has elapsed. When the determination of S710 is executed first, it is determined that the LED display time has elapsed (S710: YES). If the LED display time has elapsed, the process proceeds to S720, and in S720, the confirmation address set for reading the specific state information is the start address of the storage area storing the specific state information. It is determined whether or not.

On the other hand, if it is determined in S710 that the LED display time has not elapsed (S710: NO), the process proceeds to S760. That is, the lighting of the LED corresponding to the specific state information is continued until the LED display time elapses.

If it is determined in S720 that the confirmation address is not the top address (S720: NO), the process proceeds to S730, and the confirmation address is decremented by 1 in S730. As a result, the address of the error content read from the memory 16 next is set as the confirmation address. In step S740, the specific state information is read from the storage area indicated by the confirmation address, and the error content is acquired.

Then, the process proceeds to S750, and in S750, it is determined whether the read specific state information is the initial value of the specific state information, that is, whether the specific state information is stored in the storage area indicated by the confirmation address. Here, when the specific state information is an initial value (S750: YES), this error checking process is terminated. That is, when the specific state information stored in the storage area of the memory 16 is an initial value, the error content is skipped without being displayed (read skipped).

If it is determined in S750 that the specific state information is not stored (S750: NO), the process proceeds to S760. In S760, the error content is displayed by an LED according to the acquired code of the specific state information. Execute content display processing. When the error content display process ends, the error confirmation process ends.

If it is determined in S720 that the confirmation address is the head address of the storage area storing the specific state information (S720: YES), the process proceeds to S770, and in S770, the LED displaying the error content is turned off. Then, the process proceeds to S780, and in S780, the confirmation flag is canceled (for example, a bit indicating the confirmation flag is set to 0). Then, the process shifts to S790, and in S790, a re-reading suppression process for suppressing reading of the read specific state information is executed. When the re-reading suppression process ends, the error check process ends. In the re-reading suppression process of this embodiment, all the specific state information stored in the storage area of the memory 16 is erased.
<Details of error display processing>
Here, the details of the error content display process executed in S760 described above will be described.

This error content display process is a process of displaying the error content by lighting the LED in accordance with the specific state information read from the memory 16.
As shown in FIG. 7, first, in S810, it is determined whether or not the code of the specific state information read from the memory 16 indicates the occurrence of a disconnection (disconnection error). Here, if the code of the read specific state information represents a disconnection error (S810: YES), the process proceeds to S820, and in S820, the illumination LED 162 is turned on, and this error content display process is terminated. .

If it is determined in S810 that the read specific state information code does not represent a disconnection error (S810: NO), the process proceeds to S830. In S830, the read specific state information code indicates that the battery voltage has dropped (battery It is determined whether or not it represents a voltage drop error). If the read specific state information code indicates a battery voltage drop error (S830: YES), the process proceeds to S840. In S840, the high-speed mode LED 164 is turned on, and this error content display process is performed. Exit.

If it is determined in S830 that the read specific state information code does not represent a battery voltage drop error (S830: NO), the process proceeds to S850. In S850, the read specific state information code indicates the temperature of the motor 20. Whether or not indicates that the temperature is high (motor temperature error). If the read code of the specific state information is a motor temperature error (S850: YES), the process proceeds to S860. In S860, the medium speed mode LED 166 is turned on, and this error content display process is terminated.

If it is determined in S850 that there is no motor temperature error (S850: NO), the process proceeds to S870. In S870, the code of the read specific state information indicates that the rotor of the motor 20 is locked (motor lock error). Whether to represent or not is determined. Here, if the read code of the specific state information is a motor lock error (S870: YES), the process proceeds to S880. In S880, all remaining capacity LEDs 170, 172, 174 are turned on, and this error content display process Exit.

If it is determined in S870 that the read code of the specific state information is not a motor lock error (S870: NO), the error content display process is terminated.
As described above, in the power tool 1 of the present embodiment, when a specific state generated in the power tool 1 is detected, specific state information corresponding to the content of the specific state is generated. Further, the generated specific state information is stored in the memory 16 of the microcomputer 14. And when specific operation is added with respect to the electric tool 1, the specific state information memorize | stored in the predetermined storage area in the memory 16 will be read, and LED matched with the read specific state information will be read. Is turned on, and the content of the specific state is notified.
[Effect of the embodiment]
As described above, in the power tool 1 of the present embodiment, the specific state information stored in the memory 16 of the microcomputer 14 is read using only the components provided in the power tool 1, and the read specific state information is read out. The content of the specific state corresponding to is notified.

Therefore, according to the power tool 1, it is not necessary to use a separate device from the power tool 1 in order to read the specific state information and notify the read specific state information. As a result, the specific state information (specific state contents) stored in the electric power tool 1 can be easily recognized by the inspector of the electric power tool.

Moreover, some conventional general impact drivers include forward / reverse switching SW, illumination SW, speed mode switching SW, torque mode switching SW, and remaining capacity display SW. In such a power tool, a conventional switch can be used as a configuration to which a specific operation is applied.

That is, in the electric tool 1, a switch to which a specific operation is applied, a switch to which an operation for operating the electric tool 1 other than the specific operation is applied, and an operation for setting the electric tool 1 other than the specific operation are added. Since it is not necessary to provide a switch separately for the electric tool 1, the configuration of the electric tool 1 is simplified. As a result, according to the electric power tool 1, an increase in cost necessary for causing the inspector of the electric power tool 1 that recognizes the content of the specific operation to minimize the content of the specific state corresponding to the specific state information is minimized. It can be suppressed to the limit.

In the driving process in the above embodiment, the specific operation is an operation that is unlikely to be performed when the electric power tool 1 is normally used.
For this reason, only the inspector who recognizes the specific operation content can read the specific state information and recognize the content of the specific state corresponding to the read specific state information. That is, when a general user who does not recognize the operation defined as the specific operation is performing work using the power tool 1, the specific state information is read and the read specific state is read out. It can suppress that the content of information is reported accidentally.

Further, in the electric power tool 1, the illumination LED 162, the high speed mode LED 164, the medium speed mode LED 166, the low speed mode LED 168, and the remaining capacity LEDs 170, 172, and 174 are used to display the contents of the specific state. In addition, it is not necessary to separately provide the electric tool 1 with a display device for displaying the contents of the specific state, and the configuration of the electric tool 1 is simplified.
By the way, in the electric tool 1, the notified specific state information is deleted from the memory 16. Thereby, it can suppress that the specific state information once alert | reported is alert | reported again.

As a result, it is possible to prevent the inspector of the electric power tool 1 from being able to determine whether the notified specific state information is already notified information or newly notified information.
[Other Embodiments]
As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it is possible to implement in various aspects.

For example, in the electric power tool 1 of the above embodiment, the disconnection error, the voltage drop error, the motor temperature error, and the motor lock error are included as the contents of the specific state detected in the driving process. The content of the specific state detected by the processing is not limited to this, and may be another specific state that can occur in the electric power tool 1, such as a high temperature state of the switching elements Q1 to Q6. However, in this case, the electric power tool 1 needs to have a configuration for detecting a specific state generated in the electric power tool 1.

The memory 16 in the above embodiment stores only the specific state information. However, the information stored in the memory 16 is not limited to this, and the specific state information and the specific state information are generated. It may be stored in association with the time. In this case, when the content of the specific state corresponding to the specific state information is notified in the error content display process, the time associated with the specific state information may also be notified. In this case, the details of the specific state can be notified in more detail.

By the way, the specific operation applied to the electric power tool 1 is not limited to the specific operation shown in the above embodiment. For example, the number of times a predetermined switch is turned on / off during a specified time is set. The operation may be repeated as described above, or an operation in which the switch is pressed for a longer time than a normal switch operation.

Further, an operation for applying an impact of a predetermined value or more to the electric tool 1 a predetermined number of times may be set as the specific operation. However, in this case, the electric tool 1 needs to include a sensor (for example, a pressure sensor) for detecting the magnitude of the impact.

That is, the specific operation may be any operation as long as it is defined as an operation that is not performed when the electric power tool 1 is normally used.
Furthermore, in the error content display process in the above embodiment, when notifying the content of the specific state corresponding to the specific state information, each LED associated with the specific state information is lit for a specified time. Instead of turning on the LED, the motor 20 may be driven for a specified time, or a buzzer may be provided in the electric tool 1 and the buzzer may be sounded for a specified time. Alternatively, the power tool 1 may be provided with a display device, and the content of the specific state may be displayed on the display device.

Further, for example, one component (for example, the high speed mode LED 164) provided in the electric power tool 1 may be driven in a pattern associated with each specific state information. The pattern here is, for example, the time interval between turning on and off when the high-speed mode LED 164, medium-speed mode LED 166, low-speed mode LED 168, and remaining capacity LEDs 170, 172, and 174 blink, and the frequency at which the buzzer sounds. And time to ring.

Further, the combination of the specific state information and the driven component is not limited to the combination described in the above embodiment. For example, when notifying a disconnection error, the LED is turned on and the buzzer is sounded. Also good.

That is, the constituent elements of the electric power tool 1 may be driven in any manner as long as the constituent elements of the electric power tool 1 specified in advance for each specific state information can be driven with the predetermined contents. .

By the way, in the re-reading suppression process of the above-described embodiment, the specific state information stored in the storage area of the memory 16 is all erased, so that the read specific state information is prevented from being read again. However, it may be suppressed that the read specific state information is read again by another method. For example, the re-reading suppression process may be set so as to prohibit reading of the read specific state information. Specifically, for example, the confirmation address of the read specific state information is stored in the memory 16, and the specific state information stored in the storage area indicated by the confirmation address is re-read so as to be set as a read prohibition target. You may set an output suppression process.

In the above embodiment, the specific state information of the electric power tool 1 is stored in the memory 16 in the microcomputer 14. On the other hand, the specific state information may be stored in a storage device other than the microcomputer 14.

Furthermore, in the electric power tool 1 of the above embodiment, the switching elements Q1 to Q6 constituting the bridge circuit 12 are constituted by well-known FETs, but the switching elements Q1 to Q6 are other types of switching elements ( For example, a bipolar transistor may be used.

In the above embodiment, a three-phase brushless motor is used as the motor 20, but the motor 20 is not limited to this and may be a DC motor with a brush. When such a brushed DC motor is used as the motor 20, the bridge circuit connected to the motor 20 may be configured as an H bridge circuit, for example.

In the above embodiment, the rotational position (rotation angle) of the rotor of the motor 20 is detected using a plurality of Hall elements. Instead of using a plurality of Hall elements, each phase U, The logic of the voltage at V and W may be determined, and the rotational position of the rotor of the motor 20 may be detected based on the determination result. Or the position detection part 40 may be deleted from the said embodiment, and the rotation position of the rotor of the motor 20 does not need to be detected.

In the above-described embodiment, the impact driver has been described as an example of the electric tool to which the present invention is applied. However, the present invention is not limited to the impact driver. For example, the electric power tool (for example, a hammer drill, a cutting machine, a disk) It may be applied to a grinder or the like.

In the above embodiment, the present invention is applied to an electric tool using a battery pack as a power source. However, the present invention is also applied to an electric tool that is supplied with power from an external commercial power source via a cord. Good.

In the above embodiment, the same LED display time is set for each error content to be displayed, but different LED display times may be set.
In the above embodiment, three display units (remaining capacity display units 70, 72, 74) are provided to display the remaining capacity of the battery pack 6. However, the number of such display units is not limited. There may be.

In the above embodiment, all the remaining capacity LEDs 170, 172, and 174 are lit in S880 of the error content display process, but only some of these LEDs may be lit.

Moreover, in the said embodiment, although the torque is detected using the torque sensor 90, all the detection methods using the parameter which can be acquired in the electric tool 1 are used for the detection of a torque instead of using a torque sensor. Can do.

In the above embodiment, a group of the various SWs 10, 52 to 60 is an example of at least one switch in the present invention, and a combination of the microcomputer 14, the gate circuits 21 to 26, and the bridge circuit 12 is an example of a control unit in the present invention. It is.

In the above embodiment, the microcomputer 14 that executes the drive processing S140 and the drive determination processing S220, S240, S260, and S280 is an example of the information generation means in the present invention. A combination with the microcomputer 14 that executes the processes S230, S250, S270, and S290 is an example of the storage means in the present invention.

In the above embodiment, the microcomputer 14 that executes S510 to S560 of the specific operation determination process is an example of the operation detection means in the present invention, and the microcomputer 14 that executes S740 of the error confirmation process is in the present invention. The microcomputer 14 that executes S760 is an example of information reading means, and is an example of notification means in the present invention. The microcomputer 14 that executes S790 is an example of reread suppression means in the present invention, and various LEDs 162 A group of ˜174 is an example of the display means in the present invention, and is also an example of at least one light emitting device.

Claims (13)

1. An electric tool,
   Information generating means for monitoring the state of the power tool and generating tool information which is information relating to the state of the power tool based on a monitoring result;
   Storage means for storing the tool information generated by the information generation means;
   Operation detecting means for detecting a predetermined specific operation applied to the electric tool to read out the tool information;
   When the specific operation is detected by the operation detection unit, an information reading unit that reads the tool information stored in the storage unit from the storage unit;
   An electric tool comprising: an informing means for informing the contents of the tool information read by the information reading means.
2. At least one switch,
   The electric tool according to claim 1, wherein the specific operation is applied to the at least one switch.
3. In addition to the specific operation, the at least one switch includes an operation for operating the electric tool other than the specific operation and an operation for setting the electric tool other than the specific operation. The power tool according to claim 2, wherein at least one of them is added.
4. The power tool according to claim 2, wherein the at least one switch functions as a switch to which another operation other than the specific operation is applied in addition to functioning as a switch to which the specific operation is applied. .
5. The specific operation is:
   The power tool according to any one of claims 2 to 4, wherein the power tool is an operation applied to the at least one switch in a predetermined operation pattern.
6. The information generating means
   The power tool according to any one of claims 1 to 5, wherein occurrence of a specific state defined in advance is monitored, and the content of the generated specific state is generated as the tool information.
7. A display means for displaying information;
   The notification means includes
   The power tool according to any one of claims 1 to 6, wherein the content of the tool information is notified by displaying the content of the tool information on the display means.
8. The power tool according to claim 7, wherein the display unit displays information other than the tool information in addition to the tool information.
9. The display means includes at least one light emitting device,
   The notification means includes
   The content of the tool information is notified by performing at least the driving of the at least one light emitting device in a pattern previously associated with the content of the tool information. 8. The electric tool according to 8.
10. 10. The apparatus according to claim 1, further comprising a re-reading suppression unit that suppresses the tool information read by the information reading unit from being read again by the information reading unit. The electric tool described.
11. The reread suppression means includes:
    By erasing the tool information read by the information reading unit from the storage unit, the tool information read by the information reading unit is prevented from being read again by the information reading unit. The power tool according to claim 10.
12. A motor that is supplied with power from a power source and drives the tool part;
    A controller for controlling the operation of the electric tool including power supply from the power source to the motor,
    The said information generation means monitors the state of at least one of the said motor and the said control part, The said tool information is produced | generated based on the monitoring result. The electric tool according to one item.
13. A computer provided in the electric tool, comprising: a storage unit that stores information; and a notification unit that notifies the content of the information read from the storage unit.
    Information generating means for monitoring the state of the power tool and generating tool information which is information relating to the state of the power tool based on a monitoring result;
    Operation detecting means for detecting a predetermined specific operation applied to the electric tool;
    An information reading means for reading out the tool information stored in the storage means from the storage means when the operation detection means detects that the specific operation has been applied to the electric tool;
    A program for functioning as notifying means for notifying the contents of the tool information read by the information reading means.

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