JP6023662B2 - Electric machinery and attachments - Google Patents

Description

  The present invention relates to an electric machine instrument.

  The electric machine instrument disclosed in the following Patent Document 1 is configured such that two battery packs can be attached to the main body of the electric machine instrument. In this electric machine instrument, two battery packs mounted on the main body of the electric machine instrument are connected in series to obtain a voltage necessary for appropriately driving the motor of the electric machine instrument.

  In addition, when the remaining capacity of one of the two battery packs decreases and reaches a level that requires recharging, this electric machine instrument is a notification for notifying that the battery pack is time for replacement. And is configured to prompt the user of the electric machine instrument to replace the battery pack.

JP 2011-161602 A

  In the electric machine instrument configured as described above, when the battery pack is replaced while the user of the electric machine instrument unconsciously operates the operation switch operated to operate the motor of the electric machine instrument. The motor may operate unexpectedly by the user.

  More specifically, when the user holds the electric machine instrument with one hand and the battery pack is replaced with the other hand, the center of gravity of the electric machine instrument fluctuates with the attachment / detachment of the battery pack. There is a risk that the machine tool is tilted and one of the user's hands accidentally touches the operation switch, causing the motor to operate.

  Therefore, the present invention operates the motor of the electric machine tool even when the operation switch of the electric machine tool is operated when replacing the battery pack of the electric machine tool configured to be detachable from the plurality of battery packs. It aims at providing the technology which can suppress this.

  In order to achieve the above object, an electric machine instrument according to one aspect of the present invention includes a motor, an operation switch operated to operate the motor, and a battery in which a plurality of battery packs are detachably mounted. A mounting portion and a motor operating device for operating the motor are provided. The motor operating device includes an operation state detecting unit, a permission determining unit, and an operation control unit.

  The operation state detecting means detects whether or not the operation switch is operated. The permission determination means satisfies a permission condition, which is a condition for permitting the operation of the motor, based on the operation state of the operation switch detected by the operation state detection means and the total number of battery packs attached to the battery attachment portion. It is determined whether or not. When it is determined that the permission condition is satisfied by the permission determination means, the operation control means performs a permission operation for permitting the operation of the motor, while the permission determination means determines that the permission condition is not satisfied. In the event of a failure, a prohibition operation for prohibiting motor operation is executed.

  In the electric machine instrument configured as described above, if the permission condition is set so that the permission condition is not satisfied in the situation where the battery pack is replaced while the user of the electric machine instrument operates the operation switch, Even when the operation switch is operated when replacing the battery pack, the motor is suppressed from operating.

The electric machine instrument may be configured as, for example, an electric tool or an electric work machine.
The total number may be the actual number of battery packs attached to the battery attachment unit, or may be information corresponding to the actual number.

In order to set the permission conditions as described above, the permission determination unit may be configured in any manner.
For example, the permission determination means is that the non-operation condition that the operation switch is not operated is detected by the operation state detection means, and the total number has reached the number of battery packs necessary to operate the motor. If the battery pack number condition is satisfied, the permission condition may be determined to be satisfied.

In this case, even when the number of battery packs necessary for operating the motor is mounted on the electric machine instrument in a state where the operation switch is operated, the operation of the motor is suppressed.
The motor may require any number of battery packs to operate the motor, and may be configured to require, for example, at least two battery packs.

  In addition, the permission determination means, when the non-operation condition is not satisfied and the battery pack number condition is satisfied, after the operation state detection means detects that the operation switch is not operated, It may be configured to determine that the permission condition is satisfied by detecting again that the operation switch is operated by the operation state detection unit.

  According to the permission determination means configured as described above, when the operation switch is operated, the battery packs necessary for operating the motor are mounted on the electric machine instrument, and the motor does not operate. If the user once cancels the operation of the operation switch and operates the operation switch again, the motor can be operated.

  The motor operating device may further include an operation release notifying unit for notifying that the operation of the operation switch should be released when the battery pack number condition is satisfied in a state where the non-operation condition is not satisfied. .

In this case, the user of the electric machine tool can be prompted to release the operation of the operation switch.
The motor operating device may further include motor current detecting means for detecting the magnitude of the motor current flowing through the motor. In this case, the permission determination unit is configured to detect the motor current detected by the motor current detection unit when the non-operation condition that the operation state detection unit detects that the operation switch is not operated is satisfied. If the condition that the size of the image is not more than a preset threshold is not satisfied, the permission condition may be determined not to be satisfied.

  In the electric machine instrument provided with the motor operating device configured as described above, when a failure that causes a current to flow through the motor occurs in the electric machine instrument even though the operation switch is not operated. The motor can be suppressed from operating.

  In this case, if it is detected by the operation state detection means that the operation switch is not operated, the motor operating device may detect the electric machine if the magnitude of the motor current detected by the motor current detection means is greater than the threshold value. You may further provide the failure notification means which alert | reports the failure of an instrument.

In the electric machine instrument provided with the motor operating device configured as described above, the user of the electric machine instrument can be notified of the failure of the electric machine instrument.
In addition, the permission determination unit may recognize how the total number is, for example, configured to detect the total number based on a signal generated in association with the battery pack attached to the electric machine instrument. Also good.

  Further, the electric machine instrument may be configured to electrically connect a plurality of battery packs mounted on the battery mounting unit in parallel, or electrically connect the plurality of battery packs mounted on the battery mounting unit. You may be comprised so that it may connect in series.

  Another aspect of the present invention is an attachment that includes a motor and an operation switch that is operated to operate the motor, and that is attached to an electric machine instrument that is configured to be detachable from a plurality of battery packs. And the motor operating device described above.

Since the attachment configured as described above includes the above-described motor operating device, it can exhibit the same effect as the above-described electric machine instrument.
This attachment may be any attachment attached to the electric machine instrument, and for example, may be configured to electrically connect a plurality of battery packs to the electric machine instrument.

It is a perspective view of the electric machine instrument in exemplary embodiment with which this invention was applied. It is a schematic circuit diagram which shows the circuit structure of an electric machine instrument. It is a flowchart which shows the flow of the motor operation control process which the main control unit in embodiment performs. It is explanatory drawing which shows the example display in embodiment. It is a schematic circuit diagram which shows the modification of the circuit structure of an electric machine instrument. It is a perspective view of one modification of an electric machine instrument. It is a perspective view of another modification of an electric machine instrument.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the electric machine instrument 1 of the present embodiment is configured as an electric working machine used for gardening, for example, and more specifically, as a so-called brush cutter for cutting grass and small-diameter trees. It is configured.

The main body 10 of the electric machine instrument 1 includes a motor unit 2 and a shaft pipe 3 connected to one end of the motor unit 2.
The motor unit 2 houses a control circuit 30 and a motor M1, which will be described later, inside the motor unit 2. Furthermore, the motor unit 2 has a first battery mounting portion 21a for removably mounting the first battery pack 11a and a second battery mounting for removably mounting the second battery pack 11b on the other end of the motor unit 2. Part 21b. More specifically, the first battery mounting portion 21a is detachable by sliding the first battery pack 11a in the direction indicated by the arrow on the first battery mounting portion 21a. It is configured. The 2nd battery mounting part 21b is comprised so that the 2nd battery pack 11b can be attached or detached by the system similar to the 1st battery mounting part 21a.

  Further, the motor unit 2 is provided with a first indicator 22a and a second indicator 22b on one side surface of the motor unit 2. The 1st indicator 22a is provided corresponding to the 1st battery pack 11a and the 1st battery mounting part 21a, and displays the state of the 1st battery pack 11a. The 2nd indicator 22b is provided corresponding to the 2nd battery pack 11b and the 2nd battery mounting part 21b, and displays the state of the 2nd battery pack 11b. The first display 22a and the second display 22b may be any type of display, for example, an LED or a 7-segment display.

  In addition, the motor unit 2 is provided with a failure indicator 60 on another side of the motor unit 2 for notifying the user of the electric machine instrument 1 that a failure has occurred in the electric machine instrument 1. . The failure indicator 60 may be any type of indicator, and the failure indicator 60 in the present embodiment is an indicator including one LED.

  The shaft pipe 3 is formed in a hollow rod shape, and a cutter mounting portion 5 for detachably mounting the cutter 4 is provided at the end of the shaft pipe 3 opposite to the motor unit 2. The cutter 4 is formed in a substantially disc shape as a whole. More specifically, the central portion of the cutter 4 is formed of a material having a rigidity equal to or higher than a predetermined value (for example, a metal material or a high-hardness synthetic resin), and is formed into a disk shape or a cylindrical shape. Has been. A plurality of blades 41 are provided on the periphery of the cutter 4.

  A handle 6 is provided in the vicinity of an intermediate position in the axial direction of the shaft pipe 3. The handle 6 is provided with a right hand grip 7 for the user to hold with the right hand and a left hand grip 8 for the user to hold with the left hand. The right hand grip 7 is provided with a trigger switch 9 for operating the rotation of the cutter 4 by the user (more specifically, for operating a motor M1 described later).

  A driving force transmission shaft (hereinafter also referred to as a transmission shaft) (not shown) is accommodated in the shaft pipe 3. One end of the transmission shaft is connected to a rotor of a motor M1 (described later) housed in the motor unit 2, while the other end of the transmission shaft is cut through a plurality of gears (not shown) provided in the cutter mounting portion 5. 4 is connected. For this reason, the rotational driving force of the motor M1 is transmitted to the cutter 4 through the transmission shaft and the plurality of gears.

Furthermore, the electric machine instrument 1 has a circuit configuration as shown in FIG.
The electric machine instrument 1 includes a control circuit 30 and a motor M1 in the motor unit 2, and the first battery pack 11a and the second battery pack 11b are electrically connected to the motor M1 via the control circuit 30. It is comprised so that.

  More specifically, each of the first battery pack 11a and the second battery pack 11b includes a plurality of battery cells 12 connected in series. Each of the plurality of battery cells 12 in the present embodiment is configured as a secondary battery (for example, a lithium ion secondary battery cell). That is, the first battery pack 11a and the second battery pack 11b in the present embodiment are configured as rechargeable battery packs.

  Each of the first battery pack 11a and the second battery pack 11b includes a controller 13 that controls charging and discharging of the plurality of battery cells, a positive output terminal 24a connected to the positive electrodes of the plurality of battery cells 12, and a plurality of A negative output terminal 24 b connected to the negative electrode of the battery cell 12 and a signal terminal 26 connected to the controller 13 are provided. In the present embodiment, only one signal terminal 26 is shown in each of the first battery pack 11a and the second battery pack 11b for the sake of simplicity, but in practice, a plurality of signal terminals 26 are provided. May be.

  In this embodiment, the controller 13 is configured as an electronic circuit including a CPU, a memory, an input / output port, a battery monitoring IC, a temperature detection element, and the like. The CPU 13 performs various processes based on various programs stored in the memory. Execute. For example, when the controller 13 determines the charge level of each battery cell 12 and determines that the battery cell 12 needs to be recharged, the controller 13 sends a discharge protection signal (also referred to as an auto stop signal) to the signal terminal 26. Output. Further, the controller 13 outputs an ID signal for identifying the battery pack in which the controller 13 is mounted to the control circuit 30. Further, the controller 13 detects the temperature in the battery pack in which the controller 13 is mounted, and outputs a temperature detection signal indicating the detected temperature to the control circuit 30.

  The control circuit 30 includes a main control unit (MCU) 40, a first battery mounting unit 21a, a second battery mounting unit 21b, a first battery voltage detection unit 42a, a second battery voltage detection unit 42b, An interface unit 43a, a second interface unit 43b, a power supply circuit 44, a switch detection unit 45, a discharge control switching element 46, a drive circuit 47, a current detection unit 48, the first display 22a described above, The second display 22b described above and the failure display 60 described above are provided.

  The first battery mounting portion 21a includes a positive electrode input terminal 53a, a negative electrode input terminal 53b, and a signal terminal 55. The positive input terminal 53a is connected to the positive output terminal 24a of the first battery pack 11a, the negative input terminal 53b is connected to the negative output terminal 24b of the first battery pack 11a, and the signal terminal 55 is connected to the first battery pack 11a. The signal terminal 26 is connected. In the present embodiment, only one signal terminal 55 is shown in the first battery mounting portion 21a for simplicity of explanation, but in practice, a plurality of signal terminals 55 are provided in the same manner as the signal terminal 26. May be.

  The second battery mounting portion 21b includes a positive electrode input terminal 54a, a negative electrode input terminal 54b, and a signal terminal 56. The positive input terminal 54a is connected to the positive output terminal 24a of the second battery pack 11b, the negative input terminal 54b is connected to the negative output terminal 24b of the second battery pack 11b, and the signal terminal 56 is connected to the second battery pack 11b. The signal terminal 26 is connected. In the present embodiment, only one signal terminal 56 is shown in the second battery mounting portion 21b for the sake of simplicity, but in practice, a plurality of signal terminals 56 are provided in the same manner as the signal terminal 26. May be.

The MCU 40 is a microcomputer including a CPU, a memory, an input / output port, and the like, and the CPU executes various processes based on various programs stored in the memory.
The power supply circuit 44 is a regulator for generating a power supply voltage (DC constant voltage) for driving the MCU 40 and other parts in the control circuit 30, and at least one of the first battery pack 11a and the second battery pack 11b. A power supply voltage is generated using a DC voltage supplied from one side.

  When the first battery pack 11a and the second battery pack 11b are mounted, a DC voltage is applied to the power supply circuit 44 through the diode 52 from the first battery pack 11a and the second battery pack 11b connected in series. Is done. When only the first battery pack 11 a is attached, a DC voltage is applied to the power supply circuit 44 from the first battery pack 11 a through the diode 52 and the diode 58. Furthermore, when only the second battery pack 11 b is attached, a DC voltage is applied to the power supply circuit 44 from the second battery pack 11 b through the diode 57.

That is, the power supply circuit 44 can generate a power supply voltage as long as at least one of the first battery pack 11a and the second battery pack 11b is attached.
The first battery voltage detection unit 42a detects the output voltage of the first battery pack 11a, and outputs a first battery voltage detection signal indicating the magnitude of the output voltage of the first battery pack 11a to the MCU 40. The second battery voltage detector 42b detects the output voltage of the second battery pack 11b, and outputs a second battery voltage detection signal indicating the magnitude of the output voltage of the second battery pack 11b to the MCU 40.

  The first interface unit 43a is provided on a conductive line that connects the controller 13 and the MCU 40 of the first battery pack 11a, and transmits and receives signals (discharge protection signal, ID signal, temperature detection) between the controller 13 and the MCU 40. Relay signal). The second interface unit 43b is provided on a conductive line connecting the controller 13 and the MCU 40 of the second battery pack 11b, and is a signal (discharge protection signal, ID signal, temperature detection) transmitted and received between the controller 13 and the MCU 40. Relay signal).

  Here, since the first battery pack 11a and the second battery pack 11b are electrically connected in series in the control circuit 30, the reference potential of the controller 13 in the first battery pack 11a is higher than the reference potential of the MCU 40. High potential. Thus, since the reference potentials are different from each other, the first interface unit 43a adjusts the level of the signal voltage output from the controller 13 to a level that can be received by the MCU 40, and monitors the level of the signal voltage output from the MCU 40 by battery monitoring. The level is adjusted so that the unit 13 can receive.

  The switch detection unit 45 detects the operation state of the trigger switch 9 (that is, whether the trigger switch 9 is turned on or off), and outputs an operation state detection signal indicating the operation state to the MCU 40.

  The discharge control switching element 46 is provided on the downstream side of the motor M1 in the discharge path through which current flows from the positive side of the first battery pack 11a to the negative side of the second battery pack 11b via the motor M1. The discharge control switching element 46 controls the discharge current (that is, the motor current of the motor M1) energized to the motor M1 from the first battery pack 11a and the second battery pack 11b connected in series. Note that the discharge control switching element 46 in the present embodiment is a MOSFET. Further, the rated voltage of each of the first battery pack 11a and the second battery pack 11b in the present embodiment is such that the voltage when these battery packs are connected in series is a voltage necessary for operating the motor M1. Is set to More specifically, the first battery pack 11a and the second battery pack 11b may be configured such that each rated voltage is 14.4 VDC, 18 VDC, or 36 VDC, for example.

The drive circuit 47 turns on / off the discharge control switching element 46 in response to a command from the MCU 40.
The motor M1 is a DC motor with a brush, and is driven by a current discharged from the first battery pack 11a and the second battery pack 11b connected in series (that is, a motor current flowing through the motor M1).

The current detection unit 48 detects the magnitude of the motor current on the downstream side of the above-described discharge path, and outputs a motor current detection signal indicating the magnitude of the detected motor current to the MCU 40.
The failure indicator 60 includes one LED as described above, and performs a notification operation by changing the LED state (lighted state, blinking state, unlit state, etc.) based on a command from the MCU 40.

  Hereinafter, the motor operation control process executed by the MCU 40 (more specifically, the CPU of the MCU 40) will be described. The motor operation control process is executed when the battery pack is attached to one of the first battery attachment part 21a and the second battery attachment part 21b and the MCU 40 is activated.

  As shown in FIG. 3, in the motor operation control process, first, a first battery voltage detection signal input from the first battery voltage detection unit 42 a to the MCU 40 and a second battery voltage input from the second battery voltage detection unit 42 b to the MCU 40. 2 Based on the battery voltage detection signal, or based on various signals (discharge protection signal, ID signal, temperature detection signal, etc.) input to the MCU 40 from the first interface unit 43a and the second interface unit 43b, or Based on the combination of these signals, the mounting state of the battery pack in the electric machine instrument 1 is detected (S10).

  Then, it is determined whether or not the total number of battery packs attached to the electric machine instrument 1 is two (S20), and when only one battery pack is attached (S20: NO), Shift to S10 again.

  On the other hand, when two battery packs are mounted (S20: YES), the operation state of the trigger switch 9 is detected based on the operation state detection signal input from the switch detection unit 45 to the MCU 40 (S30). Then, it is determined whether or not the trigger switch 9 is turned off (S40).

  Here, when it is determined that the trigger switch 9 is turned on (S40: NO), the trigger switch 9 is temporarily turned off and the user of the electric machine instrument 1 is prompted to turn the trigger switch 9 on again. The restart warning display is executed through the first display 22a and the second display 22b (S50). This restart warning display may be any display. For example, as shown in FIG. 4, the restart warning display is executed by blinking the first display 22a and the second display 22b. To do.

  If it is determined in S40 that the trigger switch 9 is turned off (S40: YES), the magnitude of the motor current is detected based on the motor current detection signal input from the current detection unit 48 to the MCU 40 ( S60) It is determined whether or not the magnitude of the motor current is greater than a preset threshold value (0 amperes in the present embodiment) (that is, whether or not the motor current is flowing in the present embodiment) (S70). ). Here, when it is determined that the magnitude of the motor current is larger than the threshold value (S70: YES), a failure display indicating that the electric machine instrument 1 has failed is executed via the failure indicator 60. More specifically, for example, the failure display is performed by blinking the LED of the failure indicator 60.

  On the other hand, if it is determined in S70 that the magnitude of the motor current is equal to or less than the threshold value (S70: NO), the discharge control switching element 46 is turned on via the drive circuit 47 and the operation of the motor M1 is permitted. (S80), the motor operation control process is terminated.

  In the electric machine instrument 1 configured as described above, even if two battery packs necessary for operating the motor M1 with the trigger switch 9 turned on by the user of the electric machine instrument 1 are mounted, the electric machine instrument 1 is discharged. Since the control switching element 46 is not turned on, the operation of the motor M1 is suppressed.

  In addition, when two battery packs are mounted on the electric machine instrument 1 with the trigger switch 9 turned on and the motor M1 does not operate, the user temporarily turns off the trigger switch 9 and the trigger switch 9 If is turned on again, the motor M1 can be operated. At this time, the user can be urged to turn off the trigger switch 9 via the first display 22a and the second display 22b.

  In addition, when a failure that causes a motor current larger than the threshold value to flow in the motor M1 occurs in the electric machine instrument 1 even though the trigger switch 9 is not turned on, the discharge control switching element 46 Is not turned on, the motor M1 can be prevented from operating.

At this time, the user can be informed of a failure of the electric machine instrument 1 via the failure indicator 60.
In the present embodiment, the control circuit 30 corresponds to an example of the motor operating device in the present invention, the switch detection unit 45 corresponds to an example of the operation state detecting means in the present invention, and S10 to S40 of the motor operation control process. The MCU 40 that executes S60, S70, and S90 corresponds to an example of a permission determination unit in the present invention, and the drive circuit 47 and the discharge control switching element 46 correspond to an example of an operation control unit in the present invention.

  In this embodiment, the MCU 40 that executes S20, S30, S40, and S60 of the motor operation control process, the first display 22a, and the second display 22b correspond to an example of the operation release notifying unit in the present invention. The current detection unit 48 corresponds to an example of the motor current detection means in the present invention, and the MCU 40 that executes S40 and S60 to S80 of the motor operation control process and the failure indicator 60 are examples of the failure notification means in the present invention. It corresponds to.

  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 above embodiment, the electric machine instrument 1 (more specifically, the control circuit 30) is configured such that the first battery pack 11a and the second battery pack 11b are electrically connected in series. The voltage required to drive the motor M1 is sufficient for one of the first battery pack 11a and the second battery pack 11b, while the current required to drive the motor M1 is supplied to the motor M1. When both the first battery pack 11a and the second battery pack 11b are required for supply, the first battery pack 11a and the second battery pack 11b are electrically connected in parallel as shown in FIG. You may be comprised so that.

  In the control circuit 30 shown in FIG. 5, the positive electrode of the first battery pack 11a and the positive electrode of the second battery pack 11b are both connected upstream of the motor M1 in the discharge path, while the negative electrode of the first battery pack 11a. And the negative electrode of the second battery pack 11b are set so that the wiring in the control circuit 30 is connected to the downstream side of the motor M1 in the discharge path. Accordingly, in the control circuit 30, diodes 61 and 62 are connected to the positive input terminals 53a and 54a, respectively, so that no current flows between the first battery pack 11a and the second battery pack 11b. Further, the diodes 57 and 58 in the control circuit 30 of the above embodiment are eliminated.

Moreover, in the said embodiment, although the electric machine instrument 1 was comprised as an electrically-driven working machine, you may be comprised as an electric tool, for example, an electric circular saw as shown in FIG.
Moreover, in the said embodiment, although the control circuit 30 was provided in the main body 10 of the electrically-driven machine instrument 1, as shown in FIG. 7, for example, the 1st battery pack 11a and the 2nd battery pack 11b are connected to the electrically-driven machine instrument. It may be mounted on an attachment 120 or an attachment 130 attached to the main body 110 for electrical connection with the main body 110 of 100. In this case, the attachments 120 and 130 may be provided with indicators 140 and 150 corresponding to the first indicator 22a, the second indicator 22b, and the failure indicator 60 in the above embodiment, respectively.

  Moreover, in the said embodiment, although the failure indicator 60 was provided separately from the 1st indicator 22a and the 2nd indicator 22b, the 1st indicator 22a and the 2nd indicator indicate the failure state of the electric machine instrument 1. You may alert | report using at least one of 22b.

Moreover, in the said embodiment, although the electric machine instrument 1 was provided with the two battery mounting parts, you may provide the 3 or more battery mounting parts.
In the above embodiment, the MCU 40 is a microcomputer. However, the MCU 40 may be configured by combining various individual electronic components, or may be an ASIC (Application Specific Integrated Circuit), for example, an FPGA (FPGA). It may be a programmable logic device such as Field Programmable Gate Array) or a combination thereof.

  In the above embodiment, the motor M1 is a brushed DC motor, but the present invention can be applied to any motor such as a brushless DC motor, an AC motor, a stepping motor, or a linear motor.

  Moreover, although the battery pack in the said embodiment was comprised as a rechargeable secondary battery, you may be comprised as a primary battery which cannot be charged.

DESCRIPTION OF SYMBOLS 1 ... Electric machine instrument, 2 ... Motor unit, 3 ... Shaft pipe, 4 ... Cutter, 5 ... Cutter mounting part, 6 ... Handle, 7 ... Right hand grip, 8 ... Left hand grip, 9 ... Trigger switch, 10 ... Main body, 11a ... 1st battery pack, 11b ... 2nd battery pack, 12 ... Battery cell, 13 ... Controller, 13 ... Battery monitoring unit, 21a ... 1st battery mounting part, 21b ... 2nd battery mounting part, 22a ... 1st indicator 22b ... second display, 24a ... positive output terminal, 24b ... negative output terminal, 26 ... signal terminal, 30 ... control circuit, 41 ... blade, 42a ... first battery voltage detector, 42b ... second battery voltage detection , 43a ... first interface unit, 43b ... second interface unit, 44 ... power supply circuit, 45 ... switch detection unit, 46 ... discharge control switch , Driving circuit, 48 ... current detection unit, 52 ... diode, 53a ... positive input terminal, 53b ... negative input terminal, 54a ... positive input terminal, 54b ... negative input terminal, 55 ... signal terminal, 56 ... signal Terminals 57 ... Diodes 58 ... Diodes 60 ... Failure indicators 61 ... Diodes 62 ... Diodes 100 ... Electric machinery instruments 110 ... Main bodies 120 ... Attachments 130 ... Attachments 140 ... Indicators 150 ... Displays vessel.

Claims (12)

A motor,
An operation switch operated to operate the motor;
A battery mounting part for detachably mounting a plurality of battery packs;
A motor operating device for operating the motor,
The motor actuator is
Operation state detecting means for detecting whether or not the operation switch is operated;
Based on the operation state of the operation switch detected by the operation state detection means and the total number of battery packs mounted on the battery mounting unit, a permission condition that is a condition for permitting the operation of the motor is satisfied. Permission determination means for determining whether or not,
When it is determined by the permission determination means that the permission condition is satisfied, a permission operation for permitting the operation of the motor is executed, while the permission determination means determines that the permission condition is not satisfied. And an operation control means for executing a prohibiting operation for prohibiting the operation of the motor. The electric machine instrument according to claim 1,
The permission determination means includes
A non-operation condition that the operation state detection means detects that the operation switch is not operated; and
The battery pack number condition that the total number has reached the number of battery packs necessary to operate the motor is satisfied, and the permission condition is determined to be satisfied. Electric machinery and equipment. The electric machine instrument according to claim 2,
The motor is an electrical machine appliance configured such that at least two battery packs are required to operate the motor. The electric machine instrument according to claim 2 or 3,
The permission determination means includes
When the non-operation condition is not satisfied and the battery pack number condition is satisfied, the operation switch is detected after the operation state detection means detects that the operation switch is not operated. An electric machine instrument configured to determine that the permission condition is satisfied by detecting again that the operation is performed by the operation state detection unit. The electric machine instrument according to claim 4,
The motor actuator is
An electric machine instrument further comprising operation release notification means for notifying that the operation switch should be released when the battery pack number condition is satisfied in a state where the non-operation condition is not satisfied. It is an electrically-driven machine instrument of any one of Claims 1-5,
The motor actuator is
A motor current detecting means for detecting the magnitude of the motor current flowing through the motor;
The permission determination unit is configured to detect the motor current detected by the motor current detection unit when a non-operation condition that the operation state detection unit detects that the operation switch is not operated is satisfied. An electric machine instrument configured to determine that the permission condition is not satisfied if a condition that the size of the power supply is not more than a preset threshold is not satisfied. The electric machine instrument according to claim 6,
The motor actuator is
When it is detected by the operation state detection means that the operation switch is not operated, if the magnitude of the motor current detected by the motor current detection means is larger than the threshold, the electric machine tool An electric machine instrument further comprising failure notification means for notifying a failure. It is an electrically-driven machine instrument of any one of Claims 1-7,
The electric machine appliance is further configured to detect the total number based on a signal generated in association with a battery pack attached to the electric machine appliance. It is an electrically-driven machine instrument of any one of Claims 1-8,
An electric machine instrument configured to electrically connect the plurality of battery packs mounted on the battery mounting unit in parallel. It is an electrically-driven machine instrument of any one of Claims 1-8,
An electric machine instrument configured to electrically connect the plurality of battery packs mounted on the battery mounting unit in series. An attachment that includes a motor and an operation switch that is operated to operate the motor, and that is attached to an electric machine instrument configured to be detachable from a plurality of battery packs,
The attachment provided with the motor actuator in the electric machine instrument of any one of Claims 1-10. The attachment according to claim 11,
An attachment configured to electrically connect the plurality of battery packs to the electric machine instrument.