WO2022114120A1 - Équipement électrique, dispositif d'écriture ou de lecture, et système d'équipement électrique - Google Patents

Équipement électrique, dispositif d'écriture ou de lecture, et système d'équipement électrique Download PDF

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Publication number
WO2022114120A1
WO2022114120A1 PCT/JP2021/043370 JP2021043370W WO2022114120A1 WO 2022114120 A1 WO2022114120 A1 WO 2022114120A1 JP 2021043370 W JP2021043370 W JP 2021043370W WO 2022114120 A1 WO2022114120 A1 WO 2022114120A1
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WIPO (PCT)
Prior art keywords
terminal
battery pack
adapter
control unit
communication terminal
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Application number
PCT/JP2021/043370
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English (en)
Japanese (ja)
Inventor
俊哉 新戸
祥和 河野
Original Assignee
工機ホールディングス株式会社
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Application filed by 工機ホールディングス株式会社 filed Critical 工機ホールディングス株式会社
Priority to JP2022565446A priority Critical patent/JPWO2022114120A1/ja
Publication of WO2022114120A1 publication Critical patent/WO2022114120A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Definitions

  • the present invention relates to an electrical device, a writing or reading device, and an electrical device system operated by a battery pack.
  • Detachable battery packs are widely used as a power source in portable electric devices such as electric tools, audio devices, work tools, and lighting devices.
  • a mounting mechanism is formed on the main body of the electric device for that purpose so that the battery pack can be easily mounted and removed.
  • a mounting mechanism corresponding to the main body of the electric device is also formed on the battery pack.
  • high-level electrical control is performed using a microcomputer in driving a motor that is a work load, controlling a sound amplifier, controlling the operation of the work equipment, controlling lighting of a light source, and the like. Is widely done.
  • the control program required for the microcomputer is stored in the microcomputer and shipped in an executable state.
  • control program stored in the electric device is not rewritten after the sale, but the control program written in the storage unit is rewritten by using an external device (for example, a computer) as in Patent Document 1, for example.
  • an external device for example, a computer
  • the power tools that made it possible are also known.
  • a battery pack is connected as a power source for an electric device, but the battery pack mounting portion is provided with a connector for communication separately from the device side terminal to which the terminal of the battery pack is connected.
  • the battery pack mounting part becomes large.
  • the cable is easily disconnected from the terminal on the device side when an external force is applied to the cable to which the connector is connected.
  • the present invention has been made in view of the above background, and an object of the present invention is to provide an electric device, a writing or reading device, and an electric device system capable of realizing another function by utilizing an existing terminal. Another object of the present invention is to provide an electric device, a writing or reading device, and an electric device system in which the number of parts of the electric device is increased and the size of the battery pack mounting portion is suppressed. Still another object of the present invention is to provide an electric device, a writing or reading device, and an electric device system in which the reading device (adapter) is hard to be detached from the electric device and the unexpected start-up of the electric device is suppressed. Still another object of the present invention is to provide an electric device, a writing or reading device, and an electric device system capable of stable power supply by devising a power supply to a control unit of the electric device.
  • the battery pack is provided with a load portion operated by electric power supplied from the battery pack and a rail receiving portion that engages with the rail portion of the battery pack to guide the mounting of the battery pack. It includes a mounting unit and a control unit that controls the operation of the load unit.
  • the load unit and the control unit are housed in a housing. Further, a first terminal provided in the battery pack mounting portion and connected to the control unit separately from the power terminal for supplying power to the load portion, or a first terminal provided in the battery pack mounting portion and connected to the control unit. It is equipped with one communication terminal.
  • the battery pack mounting part is for a battery pack having a battery-side communication terminal to which the first terminal or the first communication terminal can be connected and an adapter having an adapter-side communication terminal to which the first terminal or the first communication terminal can be connected. Configured to be connectable.
  • the control unit is supplied with power via the first terminal or the first communication terminal.
  • the first terminal portion becomes the first communication terminal for communicating with the battery pack.
  • the adapter has an adapter-side rail portion that can be engaged with the rail receiving portion and is configured to be inaccessible to the battery pack.
  • the electric device includes a first communication circuit for connecting the first communication terminal and the control unit.
  • the electric device includes an energization circuit that branches from the first communication circuit and supplies electric power to the control unit. Further, the electric device is connected to the power terminal of the battery pack and includes a power supply unit that supplies power to the control unit.
  • the control unit is supplied with power from the power supply unit when the battery pack is connected to the housing. ..
  • the control unit is supplied with electric power via the first communication terminal.
  • the control unit controls so that the electric power supplied to the first communication terminal is supplied via the energization circuit. Further, the control unit is configured so that the control program of the electric device is written or read with the adapter connected to the housing.
  • the electric device is branched from the second communication terminal connected to the battery pack, the circuit connecting the second communication terminal and the control unit, and the second communication terminal and the control unit. It is equipped with a communication circuit to connect to.
  • the control unit of the electrical equipment receives the signal from the battery pack via the branched circuit that connects the second communication terminal and the control unit, and the adapter is connected to the housing. In this state, the signal from the adapter is received via the communication circuit.
  • the electric device is branched from the third communication terminal connected to the battery pack and the circuit connecting the third communication terminal and the control unit, and has a reset control circuit connecting the third communication terminal and the control unit. , Equipped with.
  • the reset control circuit of the electric device is connected to the input port of the control unit, and the first switching element provided between the third communication terminal and the input port and the control unit. It has a second switching element connected to the output port and the control terminal of the first switching element and provided between the control terminal and the output port, and the first switching element and the first switching element according to the signal from the output port. It was configured to switch the connection or disconnection of the second switching element.
  • the control unit of the electrical equipment receives the signal from the battery pack via the branched circuit connecting the third communication terminal and the control unit when the battery pack is connected to the housing, and the adapter is attached to the housing.
  • the reset control circuit was configured to function when connected.
  • the present invention has an adapter that can be attached to the battery pack mounting part of the electric device, is connected to the adapter, stores the control program of the electric device, and is stored in the electric device via the adapter.
  • a writer configured to write the control program being used.
  • the writing device outputs a reference voltage at which the control unit of the electric device operates via the first communication terminal.
  • the adapter that can be attached to the battery pack mounting portion of the electric device and the writing device connected to the adapter store the control program of the electric device, and the control program of the electric device is stored in the electric device via the adapter.
  • one of the plurality of communication terminals of the electric device is used as a power terminal for supplying power to the control unit of the electric device, and is connected to the power terminal of the battery pack. It is configured so that neither terminal is connected to the power terminal on the main body side.
  • the electrical equipment is controlled based on a positive terminal, a negative terminal, a plurality of communication terminals, a rail mechanism for attaching and detaching an externally connected device, a control circuit, and power supplied from the positive terminal and the negative terminal. It has a power circuit that supplies the operating voltage for circuit operation, and when an externally connected device is connected to an electrical device, it supplies the operating voltage using one of multiple communication terminals instead of the positive terminal. In response, it was configured to operate the control circuit on the main body of the electrical equipment.
  • an electric device capable of realizing a communication function conventionally provided with a dedicated communication terminal by using an existing connection terminal, and a reading device (adapter) that can be connected to the electric device.
  • a reading device adapter
  • the present invention it is not necessary to install a dedicated communication connector, and it is possible to suppress an increase in the number of parts constituting an electric device.
  • it is realized by devising the electric circuit on the electric device side it is not necessary to change the configuration of the battery pack mounting portion or the battery pack side, so that it is possible to suppress the increase in size of the electric device.
  • the reading device since the reading device (adapter) has a rail mechanism compatible with the battery pack, it is held by the latch mechanism at the time of mounting, so that the reading device (adapter) does not come off unexpectedly. Furthermore, when the reading device (adapter) is attached, only the control circuit of the electric device operates, so that the operation of the working unit can be avoided while enabling stable power supply.
  • FIG. 1 It is an overall block diagram of the electric equipment system which concerns on embodiment of this invention. It is a perspective view of the battery pack 100 which concerns on embodiment of this invention. It is a schematic circuit diagram when the battery pack 100 is attached to the electric device 1 of FIG. It is a schematic circuit diagram when the adapter 200 and the writing device 300 are connected to the electric device 1 of FIG. It is a flowchart for demonstrating the processing procedure at the time of starting the MCU 50 of the electric apparatus 1 which concerns on embodiment of this invention. It is a figure which shows the signal waveform which is input to each input / output port of the MCU 50 of the electric apparatus 1 which concerns on embodiment of this invention, (A) is the signal waveform at the time of program writing to which an adapter 200 is connected, (A). B) is a signal waveform when the battery pack 100 is attached.
  • FIG. 1 is an overall configuration diagram of an electrical equipment system according to an embodiment of the present invention.
  • the electrical equipment system includes a main body portion of the electrical equipment 1, a battery pack 100 that can be attached to the main body portion, and a writing device 300 having an adapter 200 that is attached in place of the battery pack 100.
  • an electric tool here, an impact tool
  • the electric device 1 is a device that operates with the battery pack 100 attached, and is a cordless device that does not require an AC power supply.
  • the state in which the battery pack 100 is attached may be referred to as "electrical device 1"
  • the main body side in the state in which the battery pack 100 is removed may be referred to as "electrical device main body”.
  • the battery pack 100 can be attached to and detached from the electric device 1, and the electric device 1 is tightened by applying a rotational force or an axial striking force to the tip tool 9 (work load portion) using a rotational driving force by a motor (load portion) (not shown).
  • the electric device 1 includes a housing 2 which is an outer frame forming an outer shape.
  • the housing 2 includes a body portion 2a for accommodating a motor and a power transmission mechanism (not shown), a handle portion 2b extending downward from the body portion 2a, and a battery pack mounting portion 2c formed under the handle portion 2b. Will be done.
  • a trigger-shaped operation switch 4 is provided in the vicinity of a part of the handle portion 2b where the index finger hits when the user grips the handle portion 2b.
  • a forward / reverse switching lever 7 for switching the rotation direction of the anvil of the motor is provided above the operation switch 4.
  • An anvil (not visible in the figure), which is an output shaft, is provided on the front side of the housing 2, and a tip tool holding portion 8 for mounting the tip tool 9 is provided at the tip of the anvil.
  • a Phillips screwdriver bit is attached as the tip tool 9.
  • the battery pack mounting portion 2c is formed with rail portions (rail receiving portions) 11a and 11b including grooves and rails extending in parallel in the front-rear direction on the inner wall portions on both the left and right sides, and a terminal portion 20 is provided between them.
  • the rail portions 11a and 11b are configured to include a rail and a rail groove on the upper side thereof, and the rail is formed with two recesses 12a and 12b.
  • the terminal portion 20 is manufactured by integrally molding a non-conductor material such as synthetic resin, and has a plurality of metal terminals, that is, a positive electrode terminal 22, a T terminal 24, a V terminal 25, an LS terminal 26, and a negative electrode terminal 27.
  • the LD terminal (abnormal signal terminal) 28 is cast.
  • the terminal portion 20 has a vertical surface 20a as an abutting surface in the mounting direction (front-back direction) and a horizontal surface 20b facing the upper surface 115 of the battery pack 100, and has an opening portion (terminal holding) in the left-right split type housing 2. It is fixed so that it is sandwiched between the parts).
  • a curved portion 13 that abuts on the raised portion 116 of the battery pack 100 is formed on the front side of the horizontal plane 20b, and a protruding portion 14 is formed near the center of the left and right sides of the curved portion 13.
  • the protrusion 14 also serves as a boss for screwing the housing 2 of the electric device 1 formed in two in the left-right direction, and also serves as a stopper that limits the relative movement of the battery pack 100 in the mounting direction.
  • the battery pack 100 is capable of outputting, for example, 36 V DC power by connecting a plurality of lithium ion battery cells having a rated voltage of 3.6 V in series.
  • a circuit board (not shown) is provided inside the battery pack 100, and a control circuit having an MCU (Micro Controller Unit) 150 (described later in FIG. 3) is mounted on the circuit board.
  • MCU Micro Controller Unit
  • two rail portions 117a and 117b are formed on both left and right sides, and a latch mechanism is provided adjacent to the rail portions 117a and 117b.
  • the adapter 200 is a connection device (external connection device) used when rewriting the stored data (program, various parameters for executing the program, etc.) stored in the microcomputer of the electric device 1, and replaces the battery pack 100. It is to be installed.
  • the shape of the adapter 200 is compatible with the structure formed in the upper case 110 of the battery pack 100, and as can be seen from FIG. 1, the rail portion (117b, etc.), the latch mechanism (118b, etc.), and the slot group (FIG. 2). 121 etc.), the shape of the raised portion 116 is the same as that of the battery pack 100. Therefore, although the adapter 200 can be attached to the electric device 1, it cannot be connected to the battery pack 100.
  • the adapter 200 is connected to the writing device 300 by a wired USB cable 320.
  • No battery cell is housed inside the adapter 200. That is, since it is not necessary to accommodate the battery cell in the internal space of the lower case 201, the lower case 201 of the adapter 200 may be smaller than the lower case 101 of the battery pack 100.
  • the upper case 210 is substantially the same as the upper case 110, but is formed to be smaller than the latch button 118b so that the rear side does not extend.
  • the shape and configuration of the adapter 200 are arbitrary, and a display lamp or a matrix display unit may be provided on the rear slope of the raised portion 116.
  • a general-purpose computer device such as a general-purpose personal computer, PDA, or smartphone can be used, and the control program for the electric device 1 is stored and stored in the electric device 1 via the adapter 200.
  • the dedicated application software for writing the control program is executed, and the necessary information is displayed on the display screen 301.
  • the writing device 300 can realize a writing (rewriting) operation to the electric device 1 via the adapter 200.
  • the writing device 300 can establish a communication path with the adapter 200 by wire or wirelessly.
  • the connection between the adapter 200 and the electric device 1 is performed by using the T terminal 24, the LS terminal 26, the negative electrode terminal 27, and the LD terminal 28, and the details will be described later with reference to FIG.
  • the adapter 200 When the communication between the adapter 200 and the writing device 300 is wired, it is connected by, for example, a USB (Universal Serial Bus) cable 320.
  • power 5V
  • the adapter 200 is equipped with a proximity wireless communication device (for example, Bluetooth (registered trademark)), it is possible to perform wireless communication 330 between the writing device 300 and the adapter 200 via the proximity wireless communication device.
  • some power source for example, for example
  • VCS for the operation of the MCU 50 (described later in FIG. 3) of the electric device 1. Battery cell) needs to be prepared.
  • the writing device 300 can be connected to a server device such as a manufacturer of the electric device 1 or a support company thereof via the Internet. Therefore, the writing device 300 can obtain update data or rewritten data for rewriting a part of the data stored in the electric device 1 from the manufacturer. Further, the writing device 300 can read the stored data of the specific electric device 1 via the adapter 200 and transmit the stored data to a server device such as a support company via the Internet.
  • a server device such as a manufacturer of the electric device 1 or a support company thereof via the Internet. Therefore, the writing device 300 can obtain update data or rewritten data for rewriting a part of the data stored in the electric device 1 from the manufacturer. Further, the writing device 300 can read the stored data of the specific electric device 1 via the adapter 200 and transmit the stored data to a server device such as a support company via the Internet.
  • FIG. 2 is a perspective view of the battery pack 100 according to the embodiment of the present invention.
  • the housing of the battery pack 100 is formed by a lower case 101 and an upper case 110 that can be divided in the vertical direction.
  • the upper case 110 is formed with a rail mechanism, that is, two rail portions 117a and 117b for attaching to the battery pack mounting portion 2c (see FIG. 1) of the electric device 1.
  • the rail portions 117a and 117b are formed so as to extend in a direction parallel to the mounting direction of the battery pack 100 and to project to the left and right side surfaces of the upper case 110.
  • the rail portions 117a and 117b are formed in a shape corresponding to the rail portions 11a and 11b including the rail groove formed in the battery pack mounting portion 2c of the electric device 1, and the rail portions 117a and 117b are the rail grooves on the electric device main body side.
  • the battery pack 100 is fixed to the electric device 1 by locking with the hooking portion 119a (not visible in FIG. 2) 119b, which is the claw of the latch mechanism, in the state of being fitted with the latch mechanism.
  • the hooking portions 119a and 119b move inward and the locked state is released. In that state, the battery pack 100 is moved to the side opposite to the mounting direction.
  • the groove portion of the rail portions 117a and 117b has an open end at the front end and a closed end connected to the front side wall surface of the raised portion 116 at the rear end.
  • the latch mechanism includes a latch button 118a (see FIG. 2) 118b and a hooking portion 119a (not visible in FIG. 2) 119b that moves inward in response to their pressing.
  • the lower surface 111 and the upper surface 115 of the upper case 110 are formed so as to have different heights in a stepped manner, and a plurality of slots 121 to 128 extending rearward from the connecting portion thereof are formed.
  • the slots 121 to 128 are notched portions so as to have a predetermined length in the battery pack mounting direction, and inside the notched portions, the electric device 1 or an external charging device (FIG.
  • a plurality of connection terminals (connection terminal group) that can be engaged with the device side terminals (not shown) are arranged.
  • the slot 121 on the right side of the battery pack 100 near the rail portion 117a serves as the insertion port for the positive electrode terminal (C + terminal) for charging
  • the slot 122 serves as the insertion port for the positive electrode terminal (+ terminal) for discharging.
  • the slot 127 on the side closer to the rail portion 117b on the left side serves as an insertion port for the negative electrode terminal (-terminal).
  • a plurality of signal terminals for transmitting signals to the battery pack 100 and the electric device 1 or an external charging device (not shown) are arranged, and here, four slots for signal terminals are arranged.
  • 123 to 126 are provided between the power terminal groups.
  • the slot 123 is a spare terminal insertion slot, and no terminal is provided in this embodiment.
  • the slot 124 is an insertion port for a T terminal for outputting a signal that serves as identification information of the battery pack 100 to the electric device 1 or the charging device.
  • Slot 125 is an insertion for a V terminal for inputting a control signal from an external charging device (not shown) or an electric device 1, specifically, a voltage signal for enabling the function of the LS terminal described later.
  • the slot 126 is an insertion port for an LS terminal for transmitting a voltage change of a thermistor (temperature sensitive element) (not shown) provided in contact with the cell.
  • a slot 128 for the LD terminal which outputs an abnormal stop signal by the battery protection circuit (not shown) included in the battery pack 100 is further provided. ..
  • the power terminal on the main body side (positive electrode terminal 22 and negative electrode terminal 27) and the power terminal on the battery pack 100 side (positive electrode terminal 132 and negative electrode terminal 137 described later). Is fitted, so that power is supplied from the battery pack 100 to the main body side of the electric device 1. Further, the signal terminals on the battery pack 100 side (terminals 134 to 136, 138 described later) are fitted with the signal terminals (T terminal 24, V terminal 25, LS terminal 26, LD terminal 28) on the main body side of the electric device 1. By doing so, the signal of the battery pack 100 and the electric device 1 side is transmitted.
  • a raised portion 116 formed so as to be raised is formed on the rear side of the upper surface 115.
  • a recessed stopper portion 116a is formed near the center of the raised portion 116.
  • the stopper portion 116a becomes a contact surface when the battery pack 100 is mounted on the battery pack mounting portion 2c.
  • the lower case 101 has a size for accommodating 10 battery cells (not shown), is manufactured by integral molding of synthetic resin, and has an opening surface on the upper side.
  • the downward opening surface of the upper case 110 and the upward opening surface of the lower case 101 are connected, and the two cases are fixed by four screws (not shown).
  • FIG. 3 is a schematic circuit diagram when the battery pack 100 is attached to the electric device 1 of FIG.
  • Ten battery cells 140 to 149 are connected in series to the battery pack 100, and a rated output of 36 V is output to the positive electrode terminal (+) 132 and the negative electrode terminal ( ⁇ ) 137.
  • the charging positive electrode terminal (C +) 131 is connected to the positive electrode side of the battery cell 140 via a fuse 139.
  • the positive and negative electrodes of the battery cells 140 to 149 are connected to the input port of the MCU 150, and the charge / discharge status of the battery cells 140 to 149 is monitored by the MCU 150.
  • the MCU (Micro Controller Unit) 150 is an integrated microprocessor that integrates a central processing unit (CPU), RAM, ROM, I / O interface circuit, etc. into one integrated circuit, and is an embedded microprocessor that functions as a microcomputer. .. Connection signals to the T terminal 134, V terminal 135, LS terminal 136, and LD terminal 138 provided in the battery pack 100 are input or output to the four input / output ports 151 to 154 of the MCU 150.
  • the T terminal 134 is connected to the input / output port 151 via the gate of the FET 161 and outputs a signal serving as identification information (code for 5 digits) of the battery pack 100 as a digital signal of 5V and 0V.
  • the transmission of this identification information is performed immediately after the MCU 150 is started. It should be noted that the transmission of the identification information is not limited to immediately after the activation of the MCU 150.
  • the T terminal 134 is a terminal for transmission from the battery pack 100 to the electric device 1 side.
  • the FET 161 is an N-channel MOSFET, the drain is connected to the T terminal 134, the source is grounded, and the input / output port 151 is connected to the gate of the FET 161.
  • the gate of the FET 161 becomes high and the source and the drain become conductive, so that the T terminal 134 is in the grounded state.
  • the output of the input / output port 151 becomes low, the source and drain of the FET 161 are cut off.
  • the V terminal 135 is connected to the input / output port 152 and the reference voltage VCS1 of the battery pack 100. Therefore, + 5V, which is the reference voltage VCS1, is constantly output from the V terminal 135 to the V terminal 25 of the battery pack 100.
  • the LS terminal 136 is a terminal for enabling the measurement of the battery temperature on the electric device 1 side.
  • the LS terminal 136 is connected to the gate of the FET 163 and the thermistor 164.
  • the drain of the FET 163 is connected to the telecommunications port 153 and is connected to the reference voltage VCC1 via the resistor 162.
  • the source of FET 163 is grounded.
  • the thermistor 164 is attached in the vicinity of any battery cell for measuring the temperature of the battery cells 140 to 149, one end side of the thermistor 164 is connected to the LS terminal 136, and the other end side is grounded.
  • an NTC thermistor is used as the thermistor 164.
  • the NTC thermistor has a characteristic that the resistance value decreases as the temperature rises. For example, when the temperature of the thermistor is 20 ° C, about 3.0 V is output, and when the temperature of the thermistor is 90 ° C, about 0.4 V (protection set value) is output.
  • the negative electrode terminal 137 is grounded.
  • the LD terminal 138 is controlled by the MCU 150 so that at least one of the battery cells 140 to 149 is grounded when over-discharged.
  • the LD terminal 138 is grounded by setting the gate signal of the FET 165 from the input / output port 154 to high (normally low).
  • the gate signal of the FET 165 is low (in the normal state)
  • the LD terminal 138 is grounded via the resistor 166.
  • the electric device 1 drives the motor 3 by using the electric power of the positive electrode terminal 22 and the negative electrode terminal 27.
  • Various motors can be used as the motor 3, but here, the brushless DC motor is driven by the drive circuit 5 using the inverter circuit.
  • An inverter circuit (not shown) includes six semiconductor switching elements. The rotational force of the motor 3 is converted into the rotational impact force of the tip tool 9 via a deceleration mechanism (not shown) and a rotary impact mechanism.
  • the regulator 60 is connected to the positive electrode terminal 22 connected to the positive electrode terminal 132 of the battery pack 100, and determines the reference voltage VCS for the operation of the MCU (Micro Controller Unit) 50 based on the power supplied from the positive electrode terminal 22 and the negative electrode terminal 27. Supply.
  • the regulator 60 is activated and the reference voltage is VCS (here, + 5V). Start supplying.
  • the MCU 50 is started by the supply of the reference voltage VCS.
  • the MCU 50 constitutes the control unit of the electric device 1, and integrates a central processing unit (CPU), a RAM, a ROM, an I / O interface circuit, etc. in one integrated circuit, and is used as an embedded computer. It is a microprocessor.
  • the MCU 50 controls the drive circuit 5 having an inverter circuit, and the brushless DC motor 3 rotates to operate a work device such as a tip tool 9 (see FIG. 1).
  • a connection status signal of the trigger switch 6 is input to the SW detection port 59 of the MCU 50, and the MCU 50 rotates the motor 3 or stops the motor 3.
  • the MCU 50 has a plurality of ports (51, 54, 55, 57) for communicating with the battery pack 100. These ports also have electrical equipment prior to the application of the present invention.
  • the T (R ⁇ D1) port 51 is connected to the T terminal 24 (an example of the third communication terminal), and the resistors R1 to R5 are located between the T terminal 24 and the T (R ⁇ D1) port 51. And the transistor Tr1 are connected.
  • the voltage between the reference voltage VCS and the T terminal 24 is divided by the resistors R1 and R2, and the divided voltage is input to the base of the transistor Tr1 via the resistor R3.
  • the collector of the transistor Tr1 is connected to the reference voltage VCS via the T (R ⁇ D1) port 51 and the resistor R5, and the emitter is grounded.
  • a resistor R4 for turning off the transistor Tr1 by grounding the base of the transistor Tr1 when the input signal of the T terminal 24 is opened is provided between the base and the emitter of the transistor Tr1.
  • the signal of the V terminal 25 is directly input to the V port 54 of the MCU 50.
  • the VCC1 here, 5V
  • the MCU 50 can determine whether or not the battery pack 100 is attached by monitoring the signal input to the V port 54.
  • the V terminal 25 is in the open state, so that the battery can be monitored by monitoring the voltage of the V port 54. It can be determined whether the pack 100 is attached.
  • the LS port 55 is connected to the LS terminal 26 (an example of the first communication terminal and the first terminal) via the resistors R13 and R14).
  • the output of the thermistor 164 is connected to the LS terminal 26 via the LS terminal 136.
  • the MCU 50 can detect the temperature of the battery cells 140 to 149 by detecting the voltage input to the LS port 55. When the temperature of the battery cells 140 to 149 changes, the detected voltage dividing voltage fluctuates.
  • the LS terminal 26 is connected to the neutral point 65 of the resistors R11 and R12 with respect to the reference voltage VCS.
  • the voltage at the neutral point 65 is connected to the LS port 55 via resistors R13 and R14.
  • a capacitor C2 is provided between the LS port 55 and the ground potential.
  • the neutral point of the resistors R13 and R14 is connected to the collector of the transistor Tr3.
  • the transistor Tr3 functions as a switch for dropping the potential of the LS port 55 to the ground potential, and the emitter of the transistor Tr3 is grounded.
  • a signal from the output port 56 of the MCU is input to the base of the transistor Tr3 via the resistor R15.
  • the output port 56 outputs a switching signal for dropping the potential of the LS terminal 26 to the ground level.
  • a resistor R16 is provided between the base of the transistor Tr3 and the emitter, and when the output signal of the output port 56 is opened, the base of the transistor Tr3 is grounded to turn off the transistor Tr3.
  • the LD port 57 is connected to the LD terminal 28 (an example of the second communication terminal) via the diode D3 and the resistor R18.
  • the connection point between the diode D3 and the resistor R18 is connected to the reference voltage VCS via the resistor R17.
  • a capacitor C3 is provided between the LD port 57 and the ground potential. When the LD terminal 28 is dropped to the ground potential, the potential of the LD port 57 is dropped to zero.
  • the above is the circuit configuration of the same part as the conventional one in the electric device 1.
  • three additional circuits surrounded by a dotted line are newly provided.
  • the additional circuits are the energization circuit 61, the first communication circuit 62, and the reset control circuit 63.
  • the energization circuit 61 is a circuit that connects between the LS terminal 26 and the neutral point 65 and the reference voltage VCS by a diode D2.
  • the diode D2 By interposing the diode D2 here, the voltage of + 5V can be supplied from the LS terminal 26 when the adapter 200 is attached as shown in FIG. 1, and the MCU 50 can be operated even when the regulator 60 is stopped. Can be made to.
  • the MCU 50 on the electric device side operates.
  • the device (motor 3 in FIG. 3) cannot be started.
  • the battery pack 100 Since the diode D2 is included in the energization circuit 61, the battery pack 100 does not function when the electric device 1 is attached, but when the adapter 200 is attached, the battery pack 100 is automatically attached to the MCU 50. Since + 5V can be supplied, the MCU 50 operates even when there is no power supply to the positive electrode terminal 22.
  • the first communication circuit 62 is a circuit that establishes a communication path to the Tool 0 (tool zero) port 58 of the MCU 50 via the LD terminal 28.
  • the LD terminal 138 and the LD terminal 28 are dropped to the ground potential.
  • the LD terminal 28 and the Tool 0 port 58 are connected via the resistor R19.
  • the resistor R20 and the diode D4 are connected between the resistor R19 and the reference voltage VCS.
  • the Tool0 port 58 is an input / output port for communication with the outside, and the Tool0 port 58 in the conventional electric device is wired to a dedicated terminal for connection with the external device.
  • the input / output signal to the Tool 0 port 58 is transmitted or received via the LD terminal 28.
  • a signal similar to that of the T terminal 24 (voltage obtained by dropping a high signal of 5 V by the resistor R19) is transmitted to the Tool 0 port 58.
  • the signal to the Tool 0 port 58 may be ignored and not used, so that the first communication circuit 62 is provided. It does not affect normal work using the battery pack 100.
  • the reset control circuit 63 is a circuit for executing a reset operation of the MCU 50 from the T terminal 24 via an external device (writing device 300) by connecting the T terminal 24 and the RESET port 52.
  • a high signal of 5V is input to the T terminal 24 when the battery pack 100 is connected.
  • the RESET port 52 is an input port for resetting the MCU 50 when a low signal is input.
  • the RESET port 52 is not connected to the T terminal 24, but is wired to a dedicated terminal for connecting to an external device.
  • the reset signal can be input to the RESET port 52 by the control from the MCU 50.
  • a high signal is basically continuously input to the RESET port 52, and when a low signal is reached, the written program is reset.
  • the potential of the RESET port 52 is kept high by being connected to the reference voltage VCS via the diode D2 and the resistor R7.
  • a capacitor C1 is provided between the RESET port 52 and the ground potential.
  • the T terminal 24 is connected to the source terminal of a MOS type FET (an example of a first switching element) via a resistor R6, and the drain terminal of the FET is connected to the RESET port 52.
  • the FET is provided with a body diode D1 so that a current flows from the source to the drain.
  • the output signal of 53 of the I / O port is input to the gate terminal of the FET via the transistor Tr2 (an example of the second switching element).
  • the MCU 50 After the MCU 50 recognizes the normal state due to the mounting of the battery pack 100, the MCU 50 continues to output a high signal from the I / O port 53.
  • the I / O port 53 When the I / O port 53 outputs a high signal, the base signal of the transistor Tr2 becomes high via the resistor R9, so that the emitter and collector of the transistor Tr2 conduct with each other, and the gate (control element) of the FET has a ground potential.
  • the drain-source of the FET is cut off. Instead, the diode D2 near the RESET port 52 and the resistor R7 keep the reference potential 5V entering the RESET port 52, so that the written contents of the MCU 50 are controlled so as not to be reset.
  • the operation of the program software is reset by the RESET port 52 (the MCU 50 (microcomputer) operates again with the contents written from the beginning), and the written contents are not erased.
  • the collector-emitter section of the transistor Tr2 is turned off, so that 5V continues to enter the FET gate due to the reference voltage VCS and the resistor R8, and the T terminal 24 and the RESET port 52 are conducted. Therefore, the reset signal from the T terminal 24 is input to the RESET port 52.
  • FIG. 4 is a schematic circuit diagram when the adapter 200 and the writing device 300 are connected to the electric device 1 of FIG.
  • the circuit configuration of the electric device 1 is the same as that of FIG.
  • a line for supplying 5V, a line for sending a write signal to Tool0, a line for connecting to Reset, and a connecting line for connecting the ground potential are provided, and these are dedicated. It was connected to the corresponding port of the MCU 50 via the connector of.
  • the connection path between the MCU 50 and the external writing device 300 is established by using the four connection terminals of the electric device 1, that is, the T terminal 24, the LS terminal 26, the negative electrode terminal 27, and the LD terminal 28. I made it.
  • the terminals are not connected to the positive power terminals (charging positive electrode terminal 21, positive electrode terminal 22) on the main body side provided in the electric device 1. Further, a reference voltage VCS of 5 V for operating the MCU 50 is supplied from the writing device 300 side via the constant voltage terminal 236 of the adapter 200, which also serves as the LS terminal 26. Further, the signal of the Tool 0 port 58 is input from the communication terminal 238 and the LD terminal 28.
  • the processor 310 of the writing device 300 includes four output terminals, that is, a RESET terminal 324, a power supply terminal 336, a ground terminal 337, and a Tool 0 terminal 338.
  • the shape of the adapter 200 especially the shape of the rail portion 117a, 117b, the slot group (121 to 128), the latch mechanism (latch buttons 118a, 118b, the latch claw 119a, 119b) and the shape of the peripheral portion thereof are compatible with the battery pack 100. Is. That is, looking only at the shape of the upper case 210 of the adapter 200, the perspective view from the viewpoint of FIG. 2 has the same shape as the battery pack 100.
  • the RESET terminal 234, the constant voltage terminal 236, the ground terminal 237, and the communication terminal 238 are provided in order at the positions of the slots 224 and 226 to 228 in the slot group.
  • These terminals (234, 236 to 238) may be formed by using the same metal parts as the T terminal 134, the LS terminal 136, the negative electrode terminal 137, and the LD terminal 138 of the battery pack. Since metal terminals are not provided in the inner portions of the remaining four slots 221 to 223 and 225, even if the adapter 200 is attached to the electric device 1, the charging positive electrode terminal 21, the positive electrode terminal 22, V of the electric device 1 are charged. The terminal 25 is not connected. Since the slot 123 (see FIG. 2) of the battery pack 100 is for spare use and is not provided with a terminal, the slot 223 of the adapter 200 is also not provided with a connection terminal.
  • a USB connector (not shown) is provided on the writing device 300 side, and is connected to a USB port (not shown) of the writing device 300.
  • the wiring of the USB cable is directly connected to the RESET terminal 234, the constant voltage terminal 236, the ground terminal 237, and the communication terminal 238. It is also optional to provide a USB port in the housing on the adapter 200 side so that the writing device 300 and the adapter 200 are connected by a general-purpose USB cable 320 having USB connectors at both ends. ..
  • the adapter 200 When the adapter 200 is attached to the electric device 1, the RESET terminal 324 and the T terminal 24 of the writing device 300 are connected, the power supply terminal 336 and the LS terminal 26 are connected, the ground terminal 337 and the negative electrode terminal 27 are connected, and the Tool 0 terminal 338 is connected. And the LD terminal 28 are connected.
  • the MCU 50 Since the reference voltage VCS is supplied to the LS terminal 26 via the energization circuit 61, the MCU 50 is activated, and the processor 310 of the writing device 300 starts communication with the MCU 50 of the electric device 1.
  • FIG. 5 is a flowchart showing a processing procedure when the MCU 50 of the electric device 1 is started.
  • the procedure shown here is executed as soon as the reference voltage VCS (+ 5V) is supplied to the MCU 50 and the MCU 50 of the electric device 1 is started (step 40), and the normal operation (battery pack 100) is performed when the MCU 50 is started. It is also a procedure for determining whether it is a program writing operation (attached by the adapter 200).
  • FIG. 6 is a diagram showing a signal waveform input to each input / output port of the MCU 50 of the electric device 1.
  • FIG. 6A is a signal waveform when the adapter 200 and the writing device 300 are attached
  • FIG. 6B is a signal waveform when the battery pack 100 is attached.
  • the power supply (reference voltage VCS) of the MCU 50 when the battery pack 100 is attached, the power supply circuit (regulator, power circuit) 60 operates by pressing the trigger switch 6, so that the reference voltage generated by the regulator 60 is generated.
  • the VCS is supplied to the MCU 50 and the MCU 50 is activated.
  • + 5V is input from the writing device 300 via the LS terminal 26, so that it is supplied to the MCU 50 as a reference voltage VCS via the diode D2 of the energization circuit 61, and the MCU 50 is immediately started. ..
  • the MCU 50 is first mounted on the battery pack mounting portion 2c (see FIG. 1) in FIG. 5 at the RESET port 52 in order to determine whether the battery pack 100 or the adapter 200 is mounted. It is determined whether or not the input signal is low (step 41).
  • the MCU 50 keeps the I / O port 53 low.
  • the reference voltage VCS is supplied from the positive electrode terminal 22 via the regulator 60.
  • the resistor R10 of the transistor Tr2 is grounded (connected to GND). Therefore, when the signal from the I / O port 53 of the MUC 50 is low or high impedance (not output), the transistor Tr2 is turned off.
  • the MCU 50 is normally activated, a high signal is output from the I / O port 53 immediately after the MCU 50 is activated (see signal 84 in FIG. 6B).
  • the delay time from the start of the MCU 50 until the I / O port 53 becomes a high signal is the processing time of the MCU 50.
  • the MCU 50 determines whether or not the signal input to the RESET port 52 is low (step 41). As shown in FIG. 6B, since the signal 82 when the battery pack 100 is attached is high, the process proceeds to step 48 to shift to the normal working operation of the electric device 1. Since the control procedure of the MCU 50 for the electric device 1 in step 48 is the same as that of the known electric device, the description thereof is omitted here.
  • step 42 it is determined whether the input of the Tool 0 port is low (step 42).
  • the reference voltage VCS high signal
  • the input of the Tool 0 port 58 is low as shown in the signal 73 of FIG. 6A, so the process proceeds to step 43.
  • step 42 is No, it is determined that it is not writing, and the process returns to step 41. However, if it is No during normal operation (when the writing device 300 operates normally), it does not occur.
  • steps 41 and 42 do not become Yes. If the result is No in step 42 due to an abnormal state, a loop will occur between the room and step 41, so that the MCU 50 will not start normally, and neither the writing operation nor the normal electric device usage operation will be possible. The state will continue.
  • the MCU 50 waits for a certain period of time (for example, about 100 ⁇ sec) (step 43), and when the signal 72 of the RESET port 52 becomes high at the time of the arrow 72a (step 44), the input signal 73 of the Tool 0 port 58 is input. It is determined whether it is low or not (step 45).
  • a certain period of time for example, about 100 ⁇ sec
  • step 45 the software writing process to the MCU 50 using the writing device 300 is started. That is, by satisfying all four branching conditions of steps 41, 42, 44, and 45 (Yes), the software writing operation is started.
  • Writing software to the MCU 50 is performed in the same manner as the conventional writing method (processing of writing program data to the ROM area of the MCU 50 via a dedicated communication connector provided separately from the device side terminal), but the communication is performed. It is different from the conventional example that it is performed via the first communication circuit 62 (see FIG. 4).
  • the writing device 300 resets the signal 72 of the RESET port 52 via the RESET terminals 324 and 234 and the T terminal 24, and resets the MCU 50 at the first row. That is, the processor operation of the MCU 50 is executed from the beginning (that is, restarted).
  • the RESET port 52 resets the MCU 50 when a low signal is input, as indicated by the upper bar. As shown in the signal 82, a high signal is normally continuously input to the RESET port 52 (when the battery pack is connected). However, since a reset is required first when writing a program, the signal 72 of the RESET port 52 becomes low when the MCU is started, as shown in FIG. 6A.
  • the high signal is continuously output from the I / O port 53 (see FIG. 4) as shown by the arrow 84 to control so that the reset is not performed.
  • the collector-emitter section of the transistor Tr2 in FIG. 4 is turned on, so that the divided voltage of the resistors R8 and R9 is transmitted to the gate of the FET, and the source of the FET-. Since the drains are turned off, no signal can be input to the RESET port 52. Instead, the diode D2 near the RESET port 52 and the resistor R7 keep the reference voltage VCS entering the RESET port 52.
  • the MCU 50 When the reset is completed by the arrow 72a, the MCU 50 returns from the reset state. After that, the transmission of the information of the MCU 50 is requested. Upon receiving the request signal, the MCU 50 returns the information (model name, memory capacity, etc.) of the MCU 50 to the writing device 300. The writing device 300 requests a security code from the MCU 50 if it matches the setting of the writing target. Upon receiving it, the MCU 50 returns a security code to the writing device 300.
  • the writing device 300 erases the memory in the designated area and transmits the erased state of the memory in the designated area to the MCU 50. If there is no problem with the erased state, the MCU 50 starts writing. After the writing is completed, the MCU 50 transmits the contents of the memory in the designated area to the writing device 300.
  • the writing device 300 confirms whether the transmitted content and the returned content match, and if they match, the writing operation is normally completed via the Tool 0 terminal 338, the communication terminal 238, and the LD terminal 28. And send it to the MCU50.
  • the MCU 50 shuts down with this signal of normal termination (step 47).
  • the microcomputer (MCU50) does not restart even when the writing device (adapter 200) is connected after the writing is completed.
  • the writing device 300 disconnects the connection, such as removing the security code, and ends the process. Further, the writing device 300 displays a message to the effect that "normal end" is displayed on the display screen 301 (see FIG. 1).
  • the procedure of the flowchart shown in FIG. 5 is executed once when the MCU 50 of the electric device 1 is started.
  • the conventional electric device is provided with a dedicated terminal for writing a program, but the existing terminal of the battery pack is also used so that the program can be written, and the battery pack 100 or the adapter 200 is used.
  • the circuit is selected to perform normal communication by the battery pack on the circuit or to communicate with the writing device 300 while receiving the operating voltage of the MCU 50.
  • the terminal dedicated to communication can be omitted from the electric device 1, and the cost can be reduced by reducing the number of parts.
  • the power for operating the MCU 50 on the electric device 1 side is supplied using the terminal for communication with the battery pack 100 (for example, the LS terminal), it is easy to connect the writing device 300 to which the adapter 200 is connected.
  • the program of the electric device 1 can be rewritten.
  • the electric device has been described as an electric tool.
  • the electric device operates by using the detachable battery pack 100 as a power source, has an MCU 50, and can communicate with the writing device 300.
  • the present invention can be applied to any device that can be used, regardless of the type of electrical device.
  • the type of the communication cable 320 to be used is arbitrary, and the adapter 200 and the writing device 300 may be connected by using a cable other than the USB cable.
  • a device for writing software (control program) such as the writing device 300
  • information such as software (control program) may be applied to a reading device that only reads from a connected electric device.
  • LD terminal 50 ... MCU, 51 ... T (R ⁇ D1) Port, 52 ... RESET port, 53 ... I / O port, 54 ... V port, 55 ... LS port, 56 ... output port, 57 ... LD port, 58 ... Tool0 port, 59 ... detection port, 60 ... regulator (power supply) Part), 61 ... energization circuit, 62 ... first communication circuit, 63 ... reset control circuit, 65 ... neutral point, 100 ... battery pack, 101 ... lower case, 110 ... upper case, 111 ... lower surface, 115 ... upper surface , 116 ... raised portion, 116a ... stopper portion, 117a, 117b ...

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

Est divulgué un équipement électrique qui permet la réécriture d'un programme en utilisant une borne de connexion existante. En vue de permettre l'écriture d'un programme dans une zone ROM d'une MCU (50) à partir d'un dispositif d'écriture en utilisant une borne existante qui est conçue pour être connectée à un bloc-batterie (100), un circuit de connexion sur le côté de l'équipement électrique (1) est changé de manière à comporter un circuit d'excitation (61), un premier circuit de communication (62) et un circuit de commande de réinitialisation (63). Lorsqu'un dispositif d'écriture (300) est connecté à l'équipement électrique (1) en utilisant un adaptateur (200), une alimentation électrique permettant le fonctionnement de la MCU (50) est délivrée par le circuit d'excitation (61) de manière à démarrer la MCU (50) et une opération de réinitialisation est effectuée par le circuit de commande de réinitialisation (63), puis l'écriture d'un programme dans une zone ROM de la MCU (50) est effectuée par un dispositif d'écriture externe par l'intermédiaire du premier circuit de communication (62). Par ailleurs, aucun des trois circuits (61-63) mentionnés ci-dessus n'a d'effet indésirable sur le fonctionnement normal de l'équipement électrique lorsque le bloc-batterie (100) est monté.
PCT/JP2021/043370 2020-11-30 2021-11-26 Équipement électrique, dispositif d'écriture ou de lecture, et système d'équipement électrique WO2022114120A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012254519A (ja) * 2011-05-19 2012-12-27 Hitachi Koki Co Ltd 電動工具及び電動工具用の通信プラグ
JP2018069445A (ja) * 2011-07-24 2018-05-10 株式会社マキタ 動力工具システム

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012254519A (ja) * 2011-05-19 2012-12-27 Hitachi Koki Co Ltd 電動工具及び電動工具用の通信プラグ
JP2018069445A (ja) * 2011-07-24 2018-05-10 株式会社マキタ 動力工具システム

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