CN111267051B - Electric tool and control method thereof - Google Patents
Electric tool and control method thereof Download PDFInfo
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- CN111267051B CN111267051B CN201811475786.7A CN201811475786A CN111267051B CN 111267051 B CN111267051 B CN 111267051B CN 201811475786 A CN201811475786 A CN 201811475786A CN 111267051 B CN111267051 B CN 111267051B
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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
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Abstract
The invention discloses an electric tool and a control method thereof, belonging to the technical field of power equipment. The electric tool comprises a shell, a control module, a power source, a transmission module, an output module and a mode switching module, wherein the mode switching module is arranged to enable the electric tool to be in a first mode gear or a second mode gear; when the electric tool is in the second mode gear, the output rotating speed of the output module of the electric tool is changed from small to large. The electric tool is powerful in functionality, high in operation refinement degree and high in user satisfaction degree.
Description
Technical Field
The invention relates to the technical field of power equipment, in particular to an electric tool and a control method of the electric tool.
Background
The electric tool is a tool using electric energy as power and mainly comprises an electric drill, an impact screwdriver, an impact wrench, an electric hammer concrete vibrator, an electric planer and the like. With the rapid development of science and technology, the classification of electric tools is more and more refined, and the application range is wider and wider. More and more electric tools are beginning to have mode adjustment and gear control functions, and the output rotation speed of the electric tool is changed by switching between gears such as a low gear and a high gear. However, the output rotating speed of each gear of the existing electric tool is generally fixed and unchangeable, the output rotating speed cannot be changed in the same gear, the using effect is poor, and the user satisfaction is low.
Disclosure of Invention
A first object of the present invention is to provide an electric power tool having a high functionality, a high degree of refinement of work, and a high degree of user satisfaction.
A second object of the present invention is to provide a control method for an electric tool, which is simple and convenient to operate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an electric tool, includes shell, control module, power supply, transmission module and output module, control module sets up inside the shell, output module with the control module communication is connected, transmission module's input with the power supply is connected, transmission module's output with output module connects, still includes:
the mode switching module is in communication connection with the control module and is configured to be capable of controlling a first mode gear in which the output rotating speed of the output module changes from large to small and/or controlling a second mode gear in which the output rotating speed of the output module changes from small to large.
Preferably, the electric power tool further includes:
and the speed switching module comprises a plurality of speed gears, is in communication connection with the control module and is used for controlling the output module to rotate at a preset rotating speed.
Preferably, the speed stages include a first speed stage, a second speed stage, and a third speed stage.
Preferably, the mode switching module includes:
the integrated switch comprises a label layer, a button layer and a control circuit board layer, wherein the label layer, the button layer and the control circuit board layer are stacked from top to bottom, a gear symbol is arranged on the label layer, a mode switching button is arranged on the button layer, and the control circuit board layer is electrically connected with the control module.
Preferably, the integrated switch further comprises:
the first indicator light is used for indicating the mode gear state of the mode switching module, is electrically connected with the control module and is positioned below the gear symbol.
A control method of an electric tool is used for the electric tool and comprises a mode gear switching method, and the mode gear switching method comprises the following steps:
pressing a mode switching button of the mode switching module, and starting to time the pressing time;
loosening the mode switching button, acquiring the pressing time T1 and an initial mode gear of the mode switching module, and starting to time the loosening time, wherein the initial mode gear is one of a first mode gear and a second mode gear;
judging whether T1 is greater than N1 or not, wherein N1 is a first preset time length stored in a control module, and if T1 is less than or equal to N1, triggering the initial mode gear by the control module;
if T1 is larger than N1, the control module controls the mode switching module to switch to the other one of the first mode gear and the second mode gear.
Preferably, the mode-gear shifting method further includes:
acquiring the release duration T2 of the mode switching button;
and judging whether T2 is greater than N2 or not, wherein N2 is a second preset time length stored in the control module, and if T2 is greater than N2, the control module controls a first indicator lamp corresponding to the mode gear where the mode switching module is located to emit light.
Preferably, the control method of the electric power tool further includes a speed-shift-step switching method including the steps of:
pressing a speed switching button of the speed switching module, and starting to time the pressing time;
loosening the speed switching button, acquiring the pressing duration T3 and the initial speed gear of the speed switching module, and starting to time the loosening time;
judging whether T3 is greater than N3, wherein N3 is a third preset time length stored in the control module, and if T3 is less than or equal to N3, the control module triggers the initial speed gear;
and if T3 is larger than N3, the control module controls the speed switching module to switch to the next gear of the initial speed gear.
Preferably, before the control module controls the speed switching module to switch to the next gear of the initial speed gear, the method further includes the following steps:
judging whether the initial speed gear is the last gear of the speed gears or not, and if so, controlling the speed switching module to be switched to the first gear of the speed gears by the control module;
if the speed is not the last gear, the control module controls the speed switching module to switch to the next gear of the initial speed gear.
Preferably, the speed range switching method further includes the steps of:
acquiring the release duration T4 of the speed switching button;
and judging whether T4 is greater than N4, wherein N4 is a fourth preset time length stored in the control module, and if T4 is greater than N4, the control module controls a second indicator light corresponding to the speed gear where the speed switching module is located to emit light.
The invention has the beneficial effects that:
the invention provides an electric tool, which can be in a first mode gear or a second mode gear by arranging a mode switching module, wherein when the electric tool is in the first mode gear, the output rotating speed of an output module of the electric tool is changed from large to small; when the electric tool is in the second mode gear, the output rotating speed of the output module of the electric tool is changed from small to large. The electric tool is powerful in functionality, high in operation refinement degree and high in user satisfaction degree.
Drawings
FIG. 1 is a schematic mechanical view of a power tool provided by the present invention;
FIG. 2 is a top view of the power tool provided by the present invention;
FIG. 3 is a schematic diagram of an integrated switch provided by the present invention;
FIG. 4 is a flow chart of a mode-gear shifting method provided by the present invention;
fig. 5 is a flowchart of a speed gear shifting method provided by the invention.
In the figure:
1. a housing; 11. an accommodating portion; 12. a handle portion; 13. a base part;
2. an output module;
3. a mode switching module; 31. a mode switch button symbol; 32. a second mode gear symbol; 33. a first mode gear symbol;
4. a speed switching module; 41. a speed switch button symbol; 42. a first speed gear symbol; 43. a second speed gear symbol; 44. a third speed gear symbol;
5. an integrated switch; 51. a label layer; 52. a button layer; 53. a control circuit board layer; 54. a first indicator light; 55. and a second indicator light.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
The invention provides an electric tool which can be an electric drill, an impact screwdriver, an impact wrench, an electric hammer concrete vibrator, an electric planer and the like. As shown in fig. 1 and 2, the electric tool includes a housing 1, a control module, a power source, a transmission module, an output module 2 and a mode switching module 3, in this embodiment, the power source is a motor, a motor shaft of the motor is connected to an input end of the transmission module, an output end of the transmission module is connected to the output module 2, the control module is disposed inside the housing 1, the output module 2 is in communication connection with the control module, the mode switching module 3 controls the motor to rotate at a certain rotation speed, the motor drives the output module 2 to rotate at a certain rotation speed through the transmission module, and the mode switching module 3 can be configured to a first mode gear for controlling the output rotation speed of the output module 2 to change from large to small and/or a second mode gear for controlling the output rotation speed of the output module 2 to change from small to large.
In this embodiment, the mode switching module 3 is disposed on the electric tool, so that the electric tool can be in the first mode gear or the second mode gear, when the electric tool is in the first mode gear, the output rotation speed of the electric tool control output module 2 changes from large to small, and when the electric tool is in the second mode gear, the output rotation speed of the electric tool control output module 2 changes from small to large. Compared with the gear mode with only constant rotating speed in the prior art, the electric tool provided by the embodiment has the advantages of strong functionality, high operation thinning degree, good operation effect and high user satisfaction degree.
Take the impact screwdriver who has this mode switching module 3 as an example, be in first mode gear when impacting the screwdriver, because output module 2's initial output rotational speed is great, consequently can realize quick nailing, along with going on of nailing operation, the nail gets into the work piece inside gradually, treat to get into nailing operation later stage, output module 2's output rotational speed reduces, electronic screwdriver reduces thereupon the impact force of work piece, can protect the work piece surface effectively, avoid the work piece surface to be destroyed, be favorable to improving the work piece surface. And when assaulting the screwdriver and being in the second mode gear, electric tool's output module 2's initial output rotational speed is less, it has the nail function of holding up to assault the screwdriver this moment, can avoid the nail skew phenomenon to appear at the in-process that gets into the work piece effectively, and along with going on of nailing operation, the nail gets into the work piece gradually, treat to get into nailing operation later stage, output module 2's output rotational speed risees, the electric screwdriver increases thereupon the impact force of work piece, can accelerate nailing speed in the later stage of nailing operation, this moment because the overwhelming majority of nail has got into in the work piece, even accelerate nailing speed nail also be difficult for taking place the slope this moment. The selection of the first mode gear and the second mode gear depends on the specific situation of the workpiece, for example, when the texture of the workpiece is soft (such as wood board, etc.), the first mode gear is easy to be adopted, and when the texture of the workpiece is hard (such as cement wall, etc.), the second mode gear is easy to be adopted.
Specifically, as shown in fig. 2, the housing 1 mainly includes a housing portion 11, a handle portion 12, and a base portion 13 connected in this order. The receiving portion 11 is disposed in a horizontal direction, and has a cavity therein, in which the control module is disposed. The output module 2 is arranged at one end of the accommodating part 11, and one end, far away from the transmission module, of the output module 2 is used for installing an electric drill, a nailing mechanism and the like. The handle portion 12 is perpendicular to the accommodating portion 11 and located at the other end of the accommodating portion 11, and an anti-slip structure is arranged on the handle portion 12 and can be anti-slip lines or anti-slip rubber pads. The base portion 13 is disposed at the bottom end of the handle portion 12 and is parallel to the accommodating portion 11, and a cavity is also disposed in the base portion 13 for accommodating a battery assembly and the like. The power tool can be vertically placed on a horizontal plane by providing the base portion 13. The housing 1 is generally made by injection molding, and for the convenience of manufacturing, in the present embodiment, the housing 1 is provided as a left housing and a right housing which are separated.
The mode switching module 3 includes an integrated switch 5, as shown in fig. 3, the integrated switch 5 includes a label layer 51, a button layer 52 and a control circuit board layer 53 stacked from top to bottom, a mode shift position symbol corresponding to a mode shift position is disposed on the label layer 51, as shown in fig. 1, the first mode shift position symbol 33 is represented by T, and the second mode shift position symbol 32 is represented by a. The button layer 52 is provided with a mode switching button, which may be hidden under the label layer 51, or may be provided to highlight the label layer 51, and when the mode switching button is hidden under the label layer 51, the mode switching button symbol 31 needs to be provided on the label layer 51. The control circuit board layer 53 is electrically connected to the control module, and the control module can trigger the first mode shift and the second mode shift of the mode switching module 3 by pressing the mode switching button.
Further, the integrated switch 5 is provided on the accommodating portion 11, and may be provided on the top surface, the left side surface, the right side surface, the front end surface, the rear end surface, or a corner of the accommodating portion 11, for example. Compared with the prior art that the switch or the button is arranged on the handle part 12 or the base part 13 and the mode switching button is arranged on the accommodating part 11, the operation of the thumb of the operator is facilitated even if the operator can clearly see the switch or the button, and the operation habit of the operator is better met. Still further, in order to facilitate the user to judge the mode in which the electric tool is located, the integrated switch 5 further includes first indicator lights 54, the number of the first indicator lights 54 is equal to the number of the mode gears, and the first indicator lights 54 are respectively arranged below the mode gear symbols, and when a certain mode gear is triggered, the first indicator light 54 located below the mode gear symbol emits light, so that the purpose of displaying the position of the mode gear by the first indicator light 54 is achieved.
In order to further expand the functionality of the electric tool, the electric tool further comprises a speed switching module 4 for controlling the output module 2 to work at a preset rotating speed, and the speed switching module 4 is in communication connection with the control module. This speed switches module 4 includes a plurality of speed gears, and the number of speed gear does not do specific restriction, can be two, three or more, and each speed gear homoenergetic controls output module 2 and in order a certain rotational speed operation of predetermineeing, and the rotational speed of predetermineeing of different speed gears is different. In the present embodiment, the electric power tool has three speed steps, namely, a first speed step, a second speed step and a third speed step, in which the output rotation speed is changed from low to high.
In order to improve the integration of the power tool, the speed switching module 4 and the mode switching module 3 are integrated together and are located on the integrated switch 5. The speed switching button of the speed switching module 4 is located on the button layer 52 of the integrated switch 5, and may be disposed to protrude from the label layer 51, or may be hidden under the label layer 51, and when hidden under the label layer 51, the label layer 51 is provided with the speed switching button symbol 41 indicating the speed switching button. Further, the label layer 51 is provided with speed range symbols representing a first speed range, a second speed range, and a third speed range, the first speed range symbol 42 being represented by the numeral 1, the second speed range symbol 43 being represented by the numeral 2, and the third speed range symbol 44 being represented by the numeral 3. A second indicator light 55 is arranged below each speed gear symbol, and when a certain speed gear is triggered, the second indicator light 55 sent by the speed gear symbol emits light. The first indicator light 54 and the second indicator light 55 may each be a light emitting diode.
The embodiment also provides a control method for the electric tool, which comprises a mode gear switching method and a speed gear switching method.
As shown in fig. 4, the mode-gear shifting method specifically includes the following steps:
step one, pressing a mode switching button of the mode switching module 3, and starting to time the pressing time.
After the mode switching button is pressed, the integrated switch 5 is triggered to control the electronic components on the circuit board layer 53, and the control circuit board layer 53 is electrically connected with the control module of the electric tool, so that once the mode switching button is pressed, the control module can perform timing.
Before pressing the mode switching button, the main switch of the electric tool needs to be ensured to be in a loosening state, and then the mode switching button is pressed, so that the safety of an operator is ensured.
And step two, loosening a mode switching button, acquiring the pressing time T1 and the initial mode gear of the mode switching module 3, and starting to time the loosening time.
When the mode switching button is released, the control circuit board layer 53 and the control module of the electric tool are electrically disconnected, and the control module acquires the pressing time period T1 and restarts the timing. The initial mode gear is a gear stored in the control module, is any one of a first mode gear and a second mode gear, can be fixed, and can also be a mode gear used by the electric tool last time. In the present embodiment, the initial mode gear is set as the second mode gear, that is, the gear that controls the output rotation speed of the output module 2 to change from small to large.
And step three, judging whether T1 is larger than N1. And N1 is a first preset time length stored in the control module.
And step four, if the T1 is less than or equal to the N1, the control module triggers an initial mode gear.
Since the initial mode gear is the second mode gear in this embodiment, the control module directly triggers the second mode gear when the control module determines that T1 is less than or equal to N1. Of course, in other embodiments, if the initial mode gear is the first mode gear, the control module triggers the first mode gear when the control module determines that T1 is less than or equal to N1.
If T1 is larger than N1, the control module controls the mode switching module 3 to switch to the other one of the first mode gear and the second mode gear. In the embodiment, when T1 is greater than N1, the control module triggers the first mode gear, so that the gear switching is completed.
When the control module controls the mode gear of the mode switching module 3 to complete the switching, the control module can control the first indicator 54 corresponding to the mode gear to emit light at the same time, so that the first indicator 54 is used for displaying the mode gear in real time. Of course, when the control module triggers the mode shift of the mode switching module 3, the first indicator 54 may also emit light in a delayed manner, so as to avoid the program in the control module from being disturbed, and improve the stability of the control module. The control step of the first indicator light 54 emitting light with a delay time is continued as shown in fig. 4, and the steps are as follows:
and step five, acquiring the releasing time T2 of the mode switching button.
And step six, judging whether T2 is larger than N2. N2 is a second preset time duration stored in the control module, and the specific time duration of N2 is not limited, and may be, for example, 1s, 0.5s, or 0.3 s.
If T2 is greater than N2, the control module controls the first indicator lamp 54 corresponding to the mode shift position in which the mode switching module 3 is located to emit light. If T2 is smaller than N2, the control module continues to count time.
After the mode gear is selected, the main switch is pressed, the control module can control the output rotating speed of the output module 2 according to the selected mode gear, the change rule of the output rotating speed can be stage change or continuous change, and no specific limitation is imposed on the change rule.
As shown in fig. 5, the speed gear shifting method includes the steps of:
step one, pressing a speed switching button of a speed switching module 4, and starting to count the pressing time.
After the speed switching button is pressed, the integrated switch 5 is triggered to control the electronic components on the circuit board layer 53, and the control circuit board layer 53 is electrically connected with the control module of the electric tool, so that once the speed switching button is pressed, the control module can perform timing.
Before pressing the speed switching button, the main switch of the electric tool needs to be ensured to be in a loose state, and then the speed switching button is pressed, so that the safety of an operator is ensured.
And step two, loosening the speed switching button, acquiring the pressing time T3 and the initial speed gear of the speed switching module 4, and starting to time the loosening time.
When the speed switching button is released, the control circuit board layer 53 and the control module of the electric tool are electrically disconnected, and at this time, the control module can acquire the pressing time period T3 and start counting again. And the electric tool comprises three speed gears, namely a first speed gear, a second speed gear and a third speed gear. The initial speed gear may be any one of a first speed gear, a second speed gear and a third speed gear, and the initial speed gear may be fixed, and may also be a speed gear in the last use, which is not limited specifically herein.
And step three, judging whether T3 is larger than N3. And N3 is a third preset time length stored in the control module.
And step four, if the T3 is less than or equal to the N3, triggering an initial speed gear by the control module.
If T3 is greater than N3, the control module controls the speed switching module 4 to switch to the next gear of the initial speed gear.
Before the gears are switched, whether the initial speed gear is the last gear or not needs to be judged, if the initial speed gear is the last gear, the control module triggers the first gear of the speed gear, and if the initial speed gear is not the last gear, the control module triggers the next gear of the speed gear.
When the control module controls the speed gear of the speed switching module 4 to complete the switching, the control module can control the second indicator light 55 corresponding to the speed gear to emit light at the same time, so that the second indicator light 55 is used to display the speed gear in real time. Of course, when the control module triggers the speed gear at which the speed switching module 4 is located, the second indicator light 55 may also emit light in a delayed manner, so as to avoid the program in the control module from being disordered and improve the control stability of the control module. The control procedure of the second indicator light 55 to emit light in a delayed manner is continued as shown in fig. 5, and the following steps are performed:
and step five, obtaining the release duration T4 of the speed switching button, wherein N4 is a fourth preset duration stored in the control module, and the specific duration of N4 is not limited and can be 1s, 0.5s, 0.3s or the like, for example.
And step six, judging whether T4 is larger than N4, if T4 is larger than N4, controlling the second indicator lamp 55 corresponding to the speed gear where the speed switching module 4 is located to emit light by the control module. If not, the control module continues timing.
After the speed gear is selected, the main switch is pressed, and the control module controls the output module 2 to rotate at a constant speed according to the speed gear.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. The utility model provides an electric tool, includes shell (1), control module, power supply, transmission module and output module (2), control module sets up inside shell (1), output module (2) with the control module communication is connected, transmission module's input with the power supply is connected, transmission module's output with output module (2) are connected, its characterized in that still includes:
the mode switching module (3) is in communication connection with the control module, and the mode switching module (3) is configured to be capable of controlling a first mode gear in which the output rotating speed of the output module (2) changes from large to small and/or controlling a second mode gear in which the output rotating speed of the output module (2) changes from small to large;
the mode switching module (3) comprises an integrated switch (5), the integrated switch (5) comprises a first indicator light (54), the first indicator light (54) is used for indicating the mode gear state of the mode switching module (3), and when the control module triggers the mode gear state of the mode switching module (3), the first indicator light (54) is in delayed lighting;
a speed switching module (4) comprising a plurality of speed gears, said speed switching module being integrated on said integrated switch (5);
the shell (1) comprises a containing part (11) arranged in the horizontal direction, and the integrated switch (5) is arranged in the containing part (11).
2. The power tool of claim 1, further comprising:
the speed switching module (4) is in communication connection with the control module and is used for controlling the output module (2) to rotate at a preset rotating speed.
3. The power tool of claim 2,
the speed steps include a first speed step, a second speed step, and a third speed step.
4. The power tool according to claim 1, wherein the integrated switch (5) comprises a label layer (51), a button layer (52) and a control circuit board layer (53) which are stacked from top to bottom, a gear symbol is arranged on the label layer (51), a mode switching button is arranged on the button layer (52), and the control circuit board layer (53) is electrically connected with the control module.
5. The power tool of claim 4, wherein the first indicator light (54) is electrically connected to the control module and is located below the gear position symbol.
6. A control method of an electric power tool for the electric power tool according to any one of claims 1 to 5, characterized by comprising a mode-shift-range switching method comprising the steps of:
pressing a mode switching button of the mode switching module (3) and starting to time the pressing time;
loosening the mode switching button, acquiring the pressing time T1 and an initial mode gear of the mode switching module (3), and starting to time the loosening time, wherein the initial mode gear is one of a first mode gear and a second mode gear;
judging whether T1 is greater than N1 or not, wherein N1 is a first preset duration stored in a control module, and if T1 is less than or equal to N1, triggering the initial mode gear by the control module;
if T1 is larger than N1, the control module controls the mode switching module (3) to switch to the other one of the first mode gear and the second mode gear;
acquiring the release duration T2 of the mode switching button;
and judging whether T2 is greater than N2 or not, wherein N2 is a second preset time length stored in the control module, and if T2 is greater than N2, the control module controls a first indicator lamp (54) corresponding to a mode gear where the mode switching module (3) is located to emit light.
7. The control method of the electric power tool according to claim 6, characterized in that the control method of the electric power tool further includes a speed gear shift method including the steps of:
pressing a speed switching button of a speed switching module (4) and starting to time pressing time;
loosening the speed switching button, acquiring the pressing duration T3 and the initial speed gear of the speed switching module (4), and starting to time the loosening time;
judging whether T3 is greater than N3, wherein N3 is a third preset time length stored in the control module, and if T3 is less than or equal to N3, the control module triggers the initial speed gear;
and if the T3 is larger than the N3, the control module controls the speed switching module (4) to switch to the next gear of the initial speed gear.
8. The control method of the electric power tool according to claim 7, characterized by further comprising, before the control module controls the speed switching module (4) to switch to the next gear of the initial speed gear, the steps of:
judging whether the initial speed gear is the last gear of the speed gears or not, and if so, controlling the speed switching module (4) to be switched to the first gear of the speed gears by the control module;
if the speed is not the last gear, the control module controls the speed switching module (4) to switch to the next gear of the initial speed gear.
9. The control method of the electric power tool according to claim 7, characterized in that the speed-shift-step switching method further comprises the steps of:
acquiring the loosening time length T4 of the speed switching button;
and judging whether T4 is greater than N4, wherein N4 is a fourth preset time length stored in the control module, and if T4 is greater than N4, the control module controls a second indicator lamp (55) corresponding to the speed gear where the speed switching module (4) is located to emit light.
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| CN201811475786.7A CN111267051B (en) | 2018-12-04 | 2018-12-04 | Electric tool and control method thereof |
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| CN201811475786.7A CN111267051B (en) | 2018-12-04 | 2018-12-04 | Electric tool and control method thereof |
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| CN111267051A CN111267051A (en) | 2020-06-12 |
| CN111267051B true CN111267051B (en) | 2023-03-03 |
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| JPS61209883A (en) * | 1985-03-11 | 1986-09-18 | 日本電池株式会社 | Reduction gear with speed change mechanism for electric rotary tool |
| JPH06190740A (en) * | 1992-12-22 | 1994-07-12 | Shimpo Ind Co Ltd | Screw driving machine |
| CN102448673A (en) * | 2009-04-13 | 2012-05-09 | 株式会社牧田 | Electric tool |
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| JP2014148001A (en) * | 2013-01-31 | 2014-08-21 | Panasonic Corp | Power tool |
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