JP6266915B2 - Dust collector - Google Patents

Description

  The present invention relates to a dust collector capable of performing an interlock operation with an electric work device.

  Conventionally, as this kind of dust collector, provided with a communication unit (adapter) that receives a signal wirelessly transmitted from the electric work device during operation of the electric work device, when a signal from the electric work device is received by the communication unit, What is comprised so that a dust collector may be drive | operated is known (for example, refer patent document 1).

  According to this type of dust collector, since it can be operated in conjunction with the electric work device without providing a signal line for detecting the operation state of the electric work device between the electric work device, for example, the electric work device Even if the device is a rechargeable cordless device, the interlocking function can be realized.

Japanese Patent No. 4955332

  However, in the above conventional dust collector, the communication unit operates by receiving AC power from an outlet provided in the dust collector body, and when the communication unit receives a signal from the electric device, the power consumption of the AC power source is increased. By doing so, the fact is notified to the dust collector body, and the linked operation is started.

  For this reason, the communication unit needs power consumption to start the interlock operation of the dust collector body, and the problem that the power consumption circuit in the communication unit becomes large and heavy cannot be avoided. In addition, due to the increase in size and weight of the communication unit, it becomes easier for the communication unit to come off from the outlet of the dust collector body, and the outer case can easily break when the communication unit is dropped. There is a risk that the user will be shocked by the AC power supply, such as the possibility of electric leakage if rainwater enters the communication unit.

  The present invention has been made in view of these problems, and in a dust collector including a communication unit that receives a transmission signal from an electric work device that is an object of interlock operation and operates the dust collector in an interlocked manner, the communication unit is misused. Even if there is, it aims to prevent the user from being electrocuted by the AC power source.

The dust collector of the present invention receives a power supply from an external AC power source, and receives a linked operation request signal that is mounted on the dust collector body and wirelessly transmitted from the electric work device. A communication unit for outputting.

The dust collector body is provided with an insulating means for electrically insulating the AC power supply and the communication unit.
For this reason, according to the dust collector of this invention, even if a user touches a communication unit internal circuit by a user's communication unit misuse, it can prevent that a user receives an electric shock.

  Further, since the dust collector main body is configured separately from the communication unit, the dust collector main body is provided with a terminal for inputting / outputting a signal to / from the communication unit when the communication unit is mounted.

  And since this terminal is electrically insulated from the AC power supply, even when the user touches the terminal when the communication unit is mounted on the dust collector body, there is no electric shock, and the dust collector is safe. Can be improved.

Here, as the insulating unit, by using the insulation transformer, an AC power supply may also be incorporated into the dust collector, and further, the operation unit that operates by receiving power supply from the AC power supply within a dust collecting machine body You may make it provide the non-contact circuit which performs transmission / reception of the signal between a communication unit and non-contact.

If an insulating transformer is used as an insulating means , not only can the communication unit and the AC power source be insulated by the insulating transformer, but also power can be taken in from the AC power source via the insulating transformer. It is possible to supply power to the internal circuit and the communication unit.

Also, if a non-contact circuit is used as the insulating means, the operation unit that receives power from an AC power supply in the dust collector body and the control unit that controls the operation unit, or the control unit and the communication unit The signal can be input / output in a non-contact manner, and noise from the AC power supply can be prevented from entering the communication unit via the signal input / output unit.

Further, in this case , since signal input / output is performed in a non-contact manner, there is no fear of contact failure between the signal input / output terminals, and the reliability of the dust collector can be improved.

Next, the communication unit receives a signal input / output unit that transmits / receives a signal including an operation command between the antenna for wireless communication and the dust collector main body, and a signal that is input / output via the antenna and the signal input / output unit. and a control unit which controls may be e Bei. In this case, the antenna across the control unit, may that be disposed on the side opposite to the signal input-output unit.

  This is because the signal input / output unit is connected to a circuit inside the dust collector body, and that part is often a wall that hinders wireless communication, and is close to the internal circuit of the dust collector body that becomes a noise source. Because.

That is, if the antenna is arranged as described above, the communication quality of the wireless communication performed with the electric work device can be improved by moving the antenna away from the wall or noise source that hinders wireless communication.

Further, in the dust collector body, and a power supply path for supplying power to the communication unit, the basis of the current flowing through the power supply path, it may be provided with a detection circuit for detecting that the communication unit is mounted.

In this way, the attachment of the communication unit can be detected without providing a dedicated terminal for detecting that the communication unit is attached to the dust collector body, and the connector for attaching the communication unit provided in the dust collector body. Therefore, it is possible to reduce the size and cost of the dust collector body.

Further, as described above, when the communication unit includes the antenna, the signal input / output unit, and the control unit , at least the control unit is covered with a waterproof resin component and stored in the case of the communication unit. may Ru is.

In this way, the control unit of the communication unit is double waterproofed by the case of the communication unit and the resin part for waterproofing, and the control unit of the communication unit malfunctions. This can be prevented better.

It is a block diagram showing the structure of the electric tool which makes the dust collector of embodiment and a dust collector operate | move interlockingly. It is explanatory drawing showing the transmission signal transmitted to a dust collector from an electric tool at the time of interlocking operation. It is explanatory drawing showing the structure of the communication unit provided in a dust collector. It is explanatory drawing showing the structure of the communication unit provided in an electric tool.

Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIG. 1, the dust collector 4 of the present embodiment includes a dust collecting hose 41 having a tip disposed in the vicinity of the electric power tool 2, and dust or cutting discharged from the electric power tool 2 through the dust collecting hose 41. It is for sucking up dust containing dust, and includes a dust collector main body 40 and a communication unit 60.

  The electric tool 2 is a grinder that cuts a workpiece by rotating the cutting grindstone 12 with a motor 14, and includes a tool body 10, a battery pack 20 that supplies power to the tool body 10, and a tool body. And a communication unit 30 provided between the battery pack 20 and the battery pack 20.

  Here, the tool body 10 has a motor 14, a power transmission unit (not shown) for transmitting the rotation of the motor 14 to the cutting grindstone 12, and a drive for driving the motor 14 by receiving power supply from the battery pack 20. The circuit 16 includes a trigger switch 18 that is operated by a user to input a drive command for the motor 14.

  The communication unit 30 includes an operation detection circuit 32 that detects the driving state of the motor 14, a transmission / reception circuit 34 that performs wireless communication with the communication unit 60 on the dust collector 4 side via the antenna 33, and a microcomputer. And a configured control circuit 36.

The operation detection circuit 32 is for detecting the drive state of the motor 14 from the current flowing in the power supply path from the battery 22 in the battery pack 20 to the drive circuit 16.
When the operation detection circuit 32 detects the drive of the motor 14 (in other words, the operation of the tool body 10), the control circuit 36 transmits an interlock command from the transmission / reception circuit 34 to the communication unit 60 of the dust collector 4. Thus, the dust collector 4 is operated in conjunction.

  Further, when the communication unit 30 transmits an interlocking command to the communication unit 60 of the dust collector 4, a signal composed of an interlocking operation request signal and an identification number signal representing its own identification number is transmitted at predetermined time intervals. Send regularly.

For this reason, the communication unit 30 includes an identification number setting unit 37 in which its own identification number is set in advance.
When the operation of the tool body 10 is detected via the operation detection circuit 32, the control circuit 36 reads the identification number from the identification number setting unit 37, and uses this as identification information unique to the electric tool 2. It is periodically output to the transmission / reception circuit 34 together with the operation request signal.

  As a result, when the tool body 10 is operating, an interlocking command composed of “interlocking operation request signal + identification number signal” shown in FIG. 2 is periodically transmitted from the communication unit 30 to the communication unit 60 of the dust collector 4. Will be.

  The communication unit 30 has an operation SW (SW is an abbreviation of a switch) for inputting an instruction (registration instruction) for registering the identification number of itself to the dust collector 4 as identification information unique to the electric tool 2. Is provided.

  The control circuit 36 reads the identification number from the identification number setting unit 37 when an identification number registration command is input from the SW circuit 38 when the operation of the power tool 2 is stopped, and the “identification number registration request signal + identification number signal” is read. Is output from the communication unit 30 to the communication unit 60 of the dust collector main body 40, so that the identification number registration request is transmitted.

  Next, the dust collector main body 40 includes a dust collection motor 42 for sucking dust including dust and cutting waste discharged from the electric power tool 2, a dust collection motor drive circuit 44 for driving the dust collection motor 42, an external A power plug 45 that is inserted into the power outlet and receives power from an AC power source and supplies the dust collecting motor drive circuit 44 with power.

  Also, in the AC power transmission path from the power plug 45 to the dust collection motor drive circuit 44, the dust collector 4 is linked to the operation of the electric power tool 2 or prohibited from being linked (not linked), or the dust collector 4 is provided to switch the operation of 4 to be stopped (off).

If the switch SW 46 is not in the off state (that is, if it is interlocked or not interlocked), the AC voltage input from the power plug 45 is output to the dust collection motor drive circuit 44.
Further, the dust collector main body 40 is constituted by a microcomputer, and a control circuit 50 for controlling the driving of the dust collector motor 42 by the dust collector motor driving circuit 44, and a communication unit 60 mounted on the control circuit 50 and the dust collector main body 40. An insulation control power supply 52 for generating a DC power supply voltage to be supplied to the power supply and a power outlet 53 for supplying the AC power supply to the electric work equipment are provided.

  When the switch SW 46 is switched to interlock or non-interlock, the AC power input from the power plug 45 is also supplied to the insulation control power supply 52 and the power outlet 53 via the switch 46.

  Note that a current detection circuit 54 that detects an alternating current supplied to the electric working device via the power outlet 53 is provided on the supply path of the AC power from the switch SW 46 to the power outlet 53.

  The dust collector main body 40 is supplied with the DC voltage generated by the insulation control power supply 52 as a power supply voltage to the communication unit 60 and is transmitted from the communication unit 30 on the power tool 2 side to the communication unit 60. An interface circuit (IF circuit) 58 is provided for exchanging information such as the interlock command and the driving state of the dust collection motor 42.

  A current detection circuit 56 for detecting a DC current supplied to the communication unit 60 is provided on the DC power supply path from the insulation control power supply 52 to the IF circuit 58. From the current detection circuit 56, The control circuit 50 receives the detection result of the direct current.

The current detection result by the current detection circuit 54 and the switching state of the switch SW 46 are input to the control circuit 50 via the signal insulation circuit 48 made of a photocoupler.
Then, the control circuit 50 passes through the dust collection motor drive circuit 44 based on the switching state of the switching SW 46 (in this case, linked / not linked) and the current value of the alternating current supplied from the power outlet 53 to the electric working device. The dust collection motor 42 is driven.

  Further, the control circuit 50 determines whether or not the communication unit 60 is attached to the IF circuit 58 based on the current value of the direct current detected by the current detection circuit 56. When the communication unit 60 is attached and the switch SW 46 is switched to “interlocking”, the dust collection motor 42 is driven via the dust collection motor drive circuit 44 in accordance with the drive command input from the communication unit 60. Let

A control signal output from the control circuit 50 toward the dust collection motor drive circuit 44 is also input to the dust collection motor drive circuit 44 via a signal insulation circuit 48 formed of a photocoupler.
This is because the signal isolation circuit 48 and the insulation control power source 52 electrically connect the communication unit 60 connected to the IF circuit 58 and the path of the AC voltage supplied from the external AC power source via the power plug 45. This is to shut off.

  That is, in the present embodiment, the signal insulation circuit 48 and the insulation control power supply 52 are insulated from the AC power supply to the communication unit 60 from the internal circuit of the dust collector body 40 that receives power supply from the external AC power supply. By supplying power and transmitting / receiving signals, the user is prevented from accidental electric shock.

The insulation control power source 52 includes an insulation transformer, and receives the power supply by stepping down the AC voltage from the AC power supply with the insulation transformer.
Next, the communication unit 60 includes an IF circuit 66 having a terminal portion that can be attached to the IF circuit 58 of the dust collector main body 40, and a transmission / reception circuit 62 that performs wireless communication with the communication unit 30 on the power tool 2 side via the antenna 61. And a control circuit 64 provided between the transmission / reception circuit and the IF circuit 66.

The control circuit 64 is configured by a microcomputer and controls transmission / reception signals by the transmission / reception circuit 62 and input / output signals by the IF circuit 66.
That is, when the control circuit 64 receives the interlock operation request signal transmitted from the communication unit 30 of the power tool 2 by the transmission / reception circuit 62, the control circuit 64 determines that the power tool 2 is based on the identification number signal transmitted together with the signal. Then, it is determined whether or not the power tool is a target of the linked operation.

Then, when the electric tool 2 is an interlock target, a drive command for the dust collection motor 42 is output to the control circuit 50 of the dust collector main body 40 to cause the dust collection motor 42 to operate in conjunction.
For this reason, the communication unit 60 is provided with a non-volatile memory (hereinafter simply referred to as a memory) 68 for storing the identification number of the power tool that is the subject of the linked operation.

  And the control circuit 64 will judge whether the identification number and the identification number in the memory 68 correspond, if the identification number transmitted from the power tool 2 side by the transmission / reception circuit 62 is received, When the identification numbers match, the dust collection motor 42 is operated in conjunction.

The memory 68 for storing the identification number is composed of an EEPROM or a flash memory that can additionally register and delete the identification number.
Then, when an identification number registration request is transmitted from the communication unit 30 on the electric power tool 2 side, the control circuit 64 additionally registers the identification number included in the registration request in the memory 68.

  Further, the communication unit 60 includes a SW circuit 70 having a registration SW for instructing additional registration of the identification number in the memory 68 and a deletion SW for instructing deletion of the identification number registered in the memory 68, and A notification circuit 72 for notifying the registration result of the identification number in the memory 68 and the deletion result is also provided.

  Then, when an additional registration command for the identification number is input from the registration SW in the SW circuit 70, the control circuit 64 performs an additional registration process for acquiring the identification number from the electric tool 2 around the dust collector 4 and registering it in the memory 68. When an identification number deletion command is input from the deletion SW in the SW circuit 70, an identification number deletion process for deleting the identification number from the memory 68 is executed.

  Next, the antenna 61, the transmission / reception circuit 62, the control circuit 64, the IF circuit 66, the memory 68, the SW circuit 70, and the notification circuit 72 constituting the communication unit 60 are all the circuit pattern of the circuit board 80 shown in FIG. And an electronic component mounted on the circuit board 80.

  As shown in FIG. 3, the antenna 61 and the IF circuit 66 (specifically, connectors for connection to the dust collector main body 40) are respectively mounted on both ends of the circuit board 80. In the circuit board 80, a component mounting area 82 for electronic components constituting the transmission / reception circuit 62, the control circuit 64, the memory 68, the SW circuit 70, and the notification circuit 72 is set between the antenna 61 and the IF circuit 66. Has been.

The circuit board 80 is mounted with a waterproof resin case 84 so as to cover the component mounting area 82 after mounting the electronic components of the above circuits in the component mounting area 82.
In addition to the component mounting area 82, the resin case 84 is configured to cover a part of the IF circuit 66 other than the connection portion to the dust collector main body 40.

The circuit board 80 is housed in an outer case 86 made of synthetic resin with the component mounting area 82 covered with a waterproof resin case 84.
The external case 86 is formed so that the connection portion of the IF circuit 66 protrudes outside, and the communication unit 60 is connected to the IF circuit 58 of the dust collector main body 40 via the connection portion.

  Next, like the communication unit 60 of the dust collector 4, the communication unit 30 of the electric power tool 2 constitutes an operation detection circuit 32, an antenna 33, a transmission / reception circuit 34, a control circuit 36, a SW circuit 38, and an identification number setting unit 37. It is configured by mounting electronic components to be mounted on the circuit board 90.

  As shown in FIG. 4, the antenna 33 is mounted on an end portion of the circuit board 90, and electronic components other than the antenna 33 are mounted in a component mounting area in the center of the circuit board 90. In addition, the component mounting area is covered with a waterproof resin case 92 as with the communication unit 60 of the dust collector 4.

  The circuit board 90 on which the electronic components are mounted and the resin case 92 is mounted so as to cover the electronic components other than the antenna 33 is housed in the outer case 94 as in the communication unit 60 of the dust collector 4.

  The outer case 94 is provided with a mounting portion 95 of the tool body 10 on the mounting surface side of the electronic component on the circuit board 90 in order to have a function of connecting the tool body 10 and the battery pack 20. A mounting portion 96 for the battery pack 20 is formed on the opposite side.

  Then, the rear end side of the tool main body 10 is mounted on the mounting portion 96 in a state where the front end side of the tool main body 10 to which the cutting grindstone 12 is mounted protrudes from the side opposite to the antenna 33. The battery pack 20 is attached.

  As described above, in the dust collector 4 of the present embodiment, the dust collector body 40 is provided with the signal insulation circuit 48 constituted by a photocoupler and the insulation control power source 52 constituted by an insulation transformer. By each unit, the path of the AC voltage supplied from the external AC power supply and the communication unit 60 are electrically insulated.

  For this reason, even if the user touches the terminal of the IF circuit 58 when the communication unit 60 is mounted on the dust collector body 40 by insulating the communication unit 60 from the AC power supply and transmitting / receiving signals. There is no electric shock and safety can be improved.

  In the communication unit 60, the antenna 61 is disposed on the opposite side of the IF circuit 66 that is a signal input / output unit on the communication unit 60 side with an internal circuit such as the control circuit 64 interposed therebetween. For this reason, the antenna 61 can be kept away from the connection part with the dust collector main body 40 that hinders wireless communication, and the wireless communication by the antenna 61 can be executed well.

  In the communication unit 60, all components (electronic components) except for the antenna 61 and the IF circuit 66 connector are covered with a waterproof resin case 84 on the circuit board 80. Water resistance can be increased.

  In particular, the communication unit 30 of the electric power tool 2 is likely to be splashed with water by using the electric power tool 2, but also in this communication unit 30, components (electronic parts) other than the antenna 33 are arranged on the circuit board 90. Since it is covered with the waterproof resin case 92, it is possible to improve water resistance and reduce the occurrence of failures caused by water on the communication unit 30.

  Further, in the dust collector main body 40, a current detection circuit 56 is provided on the path of the DC power supplied from the insulation control power supply 52 to the communication unit 60, and the control circuit 50 is detected by the current detection circuit 56. Based on the detected current, it is detected that the communication unit 60 is mounted.

  Therefore, the attachment of the communication unit can be detected without providing a dedicated terminal for detecting that the communication unit 60 is attached to the dust collector body 40, and the size of the connector constituting the IF circuit 58 can be reduced. Thus, the dust collector main body 40 can be reduced in size and cost.

  In the present embodiment, the insulation control power supply 52 and the signal insulation circuit 48 correspond to the insulation means of the present invention, and in particular, the signal insulation circuit 48 corresponds to the non-contact circuit of the present invention. The IF circuit 66 corresponds to the signal input unit of the present invention, and the control circuit 64 corresponds to the control unit of the present invention.

As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various aspect can be taken in the range which does not deviate from the summary of this invention.
For example, in the above embodiment, in order to insulate between the communication unit and the external AC power source, the insulation control power source 52 constituted by an insulation transformer and the signal insulation circuit 48 constituted by a photocoupler in the dust collector body. However, the IF circuit 58 may be provided with an insulating transformer or a photocoupler to electrically insulate the dust collector body and the communication unit 60 from each other.

  Moreover, since this insulation should just restrict | limit the leak current which flows into the communication unit 60 from the dust collector main body 40 to below a predetermined value, you may make it give an impedance to the current path with a capacitor | condenser or resistance.

The insulation control power supply 52 may be an insulation type switching power supply.
In the above embodiment, the DC voltage generated by the insulation control power supply 52 is supplied to the communication unit 60 as the power supply voltage. However, the power supply from the dust collector body 40 to the communication unit 60 is not necessarily performed. The communication unit 60 may include a battery as a DC power source.

  In this way, it is possible to insulate between the AC power source and the communication unit 60 only by providing a photocoupler or the like between the dust collector main body 40 and the communication unit 60, and the function as an insulating means can be realized very easily. .

  In the above embodiment, the antennas 33 and 61 are described as being disposed outside the resin cases 84 and 92 in the communication units 30 and 60. However, the antennas 33 and 61 are also disposed in the resin cases 84 and 92. You may make it accommodate in.

  In the above embodiment, the electric working device that is the target of the linked operation of the dust collector 4 has been described as a grinder. However, the electric working device that discharges dust and cutting waste by its operation, such as a marnoco and a canna. That's fine.

  DESCRIPTION OF SYMBOLS 2 ... Electric tool, 4 ... Dust collector, 10 ... Tool main body, 12 ... Cutting grindstone, 14 ... Motor, 16 ... Drive circuit, 18 ... Trigger switch, 20 ... Battery pack, 22 ... Battery, 30 ... Communication unit, 32 ... Operation Detection circuit 33 ... Antenna 34 ... Transmission / reception circuit 36 ... Control circuit 37 ... Identification number setting unit 38 ... SW circuit 40 ... Dust collector body 41 ... Dust collection hose 42 ... Dust collection motor 44 ... Dust collection Motor drive circuit 45 ... Power plug 46 ... Switch SW 48 ... Signal insulation circuit 50 ... Control circuit 52 ... Insulation control power supply 52 ... Control circuit 53 ... Power outlet 54, 56 ... Current detection circuit 58 ... IF circuit, 60 ... communication unit, 61 ... antenna, 62 ... transmission / reception circuit, 64 ... control circuit, 66 ... IF circuit, 68 ... memory, 70 ... SW circuit, 72 ... notification circuit, 80,9 ... circuit board, 82 ... parts packaging area, 84 and 92 ... resin case, 86, 94 ... outer case, 95, 96 ... mounting portion.

Claims (5)

A dust collector body that operates by receiving power from an external AC power supply;
A communication unit that is attached to the dust collector body, receives an interlocking operation request signal wirelessly transmitted from the electric work device, and outputs an operation command to the dust collector body;
With
In the dust collector body,
An insulating means for electrically insulating the AC power supply and the communication unit is provided,
The communication unit is
An antenna for wireless communication;
A signal input / output unit that exchanges signals including the operation command with the dust collector main body;
A control unit that controls signals input / output via the antenna and the signal input / output unit;
And at least the control unit is covered with a waterproof resin component and is housed in a case of the communication unit, and the antenna is on the opposite side of the signal input / output unit across the control unit. A dust collector characterized by being arranged . A dust collector body that operates by receiving power from an external AC power supply;
A communication unit that is attached to the dust collector body, receives an interlocking operation request signal wirelessly transmitted from the electric work device, and outputs an operation command to the dust collector body;
With
In the dust collector body,
Insulating means for electrically insulating the AC power supply and the communication unit;
A power supply path for supplying power to the communication unit;
A detection circuit for detecting that the communication unit is mounted based on a current flowing through the power supply path;
Dust collector characterized by being equipped with. The communication unit is
An antenna for wireless communication;
A signal input / output unit that exchanges signals including the operation command with the dust collector main body;
A control unit that controls signals input / output via the antenna and the signal input / output unit;
The dust collector according to claim 2 , wherein the antenna is disposed on the opposite side of the signal input / output unit with the control unit interposed therebetween. The dust collector according to any one of claims 1 to 3, wherein an insulating transformer is provided as the insulating means. Wherein the insulating means, claims 1, characterized in that it comprises a non-contact circuit for exchanging signals between the communication unit and the operation unit which operates by receiving power supply from the AC power supply to the non-contact Item 5. The dust collector according to any one of Items 4 .