JP3100620U - Rotary power tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary power tool capable of continuously performing work by eliminating the need to temporarily stop use every time charging by enabling charging of a battery while performing work. provide.
SOLUTION: A charger 1 capable of converting an alternating current into a direct current and outputting the same, a plug plug inlet 2, a switch 3, a drive unit 4, an electric motor 5, a battery 7, a light emitting diode (LED) 8, a casing. When the power is supplied by connecting the charger 1 to the outlet 2 and the switch 3 is turned on, the LED 8 is turned on by a part of the supplied current, and the battery 7 is supplied by the remaining current. When charging, the electric motor 5 is driven, and the switch 3 is turned off, the battery 7 is charged with the supplied current, the LED 8 is turned on, and when the charger 1 is not connected to the outlet 2, When the switch 3 is turned on, a circuit for driving the electric motor 5 with the power of the battery 7 is provided. When the battery 7 is charged, the charging current is controlled not to exceed a predetermined value and the charging current becomes insufficient. If you have A control panel 6 is provided in the casing 9 for supplying the shortage from the electric appliance 1 and for turning on or off the LED 8 when the battery 7 is fully charged.
[Selection diagram] Fig. 1

Description

  The present invention is a rotary power tool that can be used not only as a rechargeable power tool or an AC power tool, but also to charge a built-in battery while using it as an AC power tool. The present invention relates to a rotary power tool capable of performing the following.

Among conventional rotary power tools, there is a rotary power tool that stores electricity in a built-in battery by charging and drives a control circuit, a motor, and the like with the power of the battery (for example, see Patent Document 1).
JP-A-2003-209960 (pages 2 to 4, FIGS. 1 and 2)

  When using such a rechargeable power tool, the battery must always be charged to a certain level before use.If power is consumed to some extent during use, be sure to stop using the power tool for a certain period of time and re-use it. The battery cannot be used unless it is recharged. Therefore, since the tool cannot be used continuously for a predetermined time or more determined by the capacity of the battery, the working time is limited for one use of the tool, and continuous work cannot be performed.

  The present invention provides a rotary power tool that enables continuous charging by eliminating the need to temporarily stop using the battery each time charging is performed by allowing the battery to be charged while performing work. With the goal.

In order to solve the above-mentioned problems, a rotary electric tool (hereinafter, also referred to as an electric tool) of the present invention includes a charger capable of converting an AC current into a DC current and outputting the DC current, a plug of a charger plug, and a switch. , A drive unit, an electric motor, a battery, a light emitting diode (hereinafter, also referred to as an LED), and a rotary electric tool having a casing,
If the switch is turned on when a charger is connected to the insertion port to supply power, the LED is turned on with a part of the supplied current, and the battery is charged with the remaining current, and the battery is charged. When the motor is driven and the switch is turned off, the battery is charged with the supplied current, the LED is turned on, and the switch is turned on when the charger is not connected to the outlet. Then, a circuit for driving an electric motor with the electric power of the battery is provided, and the charging current flowing through the battery is suppressed so as not to exceed a predetermined value. A control panel is provided in the casing to supply the shortage from the battery, and to blink or not to light the LED when the battery 7 is fully charged. It is characterized in that was.

  Further, the control panel has a configuration in which an integrated circuit, a first resistor, a first diode, and a second diode are connected in series, and the current supplied from the receptacle is the battery, the integrated circuit. A first resistor, a first diode, and a circuit that flows into the outlet through the LED and the second resistor at the same time as flowing into the outlet again; and when the switch is turned on, A circuit may be provided in which a part of the current supplied from the outlet flows into the electric motor via the switch, and then flows into the outlet.

  According to the rotary power tool of the present invention, it is not necessary to take out the battery for charging, and by connecting a charger to the insertion port, power is supplied to the power tool to charge the battery. At the same time, the electric power of the charger is supplied to the electric motor so that the electric tool can be used in a normal state. In addition, the control panel controls the charging current supplied from the charger and flowing to the battery to be a predetermined value, so that an appropriate charging state can be obtained, and the overcharging of the battery can be performed. Damage can be avoided.

  The advantage of the present invention is that even if the power of the battery of the power tool is insufficient, the power tool can be used in a normal state as soon as the charger is connected, and the battery can be put in an appropriate charging state. The point is that the charging of the battery and the use of the power tool can be performed in parallel.

  As shown in FIG. 1, a rotary power tool 10 includes a charger 1 capable of converting an AC current into a DC current and outputting the converted DC current, a plug insertion port 2 for the charger, a switch 3, a drive unit 4, an electric motor 5, and a battery. 7, an LED 8, a control panel 6 and the like are arranged in a casing 9.

  Then, as shown in FIG. 2, a battery 7 and a switch 3 to which the electric motor 5 is connected are connected in parallel to the output side of the insertion port 2, and the output sides of the battery 7 and the switch 3 are connected to the control panel 6 respectively. , And the output side of the control panel 6 is connected to the insertion port 2 to form a closed circuit. The LED 8 is connected in the circuit so as to be in parallel with the battery 7, the switch 3, and the integrated circuit IC.

  Therefore, when the charger 1 is connected to the outlet 2 and power is supplied, if the switch 3 is turned on, the LED 8 can be turned on with a part of the supplied current, and the battery 7 can be powered with the remaining current. And the electric motor 5 can be driven. When the switch 3 is turned off, the battery 7 can be charged with the supplied current and the LED 8 can be turned on. Then, when the charger 1 is not connected to the outlet 2, if the switch 3 is turned on, the electric power of the battery 7 can be supplied to drive the electric motor 5.

  The control panel 6 functions to suppress the charging current flowing through the battery 7 from becoming a predetermined value or more, and to supply the shortage from the charger 1 when the charging current is insufficient. Also, when the battery 7 is fully charged, the LED 8 can be made to blink or not to be turned on.

  The control panel 6 is configured by connecting an integrated circuit IC, a first resistor R1, a first diode D1, and a second diode D2 in series. Then, by using the control panel 6, the direct current supplied from the insertion port 2 flows in the order of the battery 7, the integrated circuit IC, the first resistor R1, and the first diode D1, and flows into the insertion port 2 again. At the same time, a circuit flowing into the outlet 2 via the LED 8 and the second resistor R2, and when the switch 3 is turned on, a part of the DC current supplied from the outlet 2 is supplied to the electric motor 5 via the switch 3. A circuit is configured to flow into the insertion port 2 again after flowing.

  Such a power tool 10 supplies power to the power tool 10 by connecting the charger 1 to the insertion port 2 when the charge amount of the battery 7 is insufficient. Then, a current flows through a circuit including the battery 7, the integrated circuit IC, the first resistor R1, and the first diode D1, and the battery 7 is charged. At this time, the charging current flowing through the battery 7 is limited by the integrated circuit IC of the control panel 6 and the first resistor R1 so that the charging current does not exceed a predetermined value. Can be. At the same time, current also flows through the LED 8 and the resistor R1, and the LED 8 is turned on. Thus, it can be confirmed that the battery 7 is in a charged state by turning on the LED 8. Further, the blinking or non-lighting of the LED 8 indicates that the battery 7 is fully charged.

  If the switch 3 is turned on while the charger 1 is connected to the insertion port 2 as described above, the electric current can be supplied to the electric motor 5 via the switch 3, so that the electric motor is charged while the battery 7 is charged. 5 can be driven.

  If the battery 7 is charged to a certain level, the charger 1 may be removed from the insertion port 2. If the switch 3 is turned on in this state, the current charged in the battery 7 can be supplied to the motor 5 by the closed circuit including the switch 3 to which the motor 5 is connected, the second diode D2, and the battery 7. It is. Therefore, the operation can be performed by moving the drive unit 4 without using the charger 1.

  Further, by switching the switch 3, the input side and the output side of the electric current of the electric motor 5 are interchanged to change the rotation direction. More specifically, when the upper side of the switch lever 11 connected to the switch 3 is pressed, the chuck portion 12 connected to the drive unit 4 can be rotated forward, and when the lower side is pressed, the chuck portion 12 is rotated in the reverse direction. (See FIG. 3). Therefore, if a driver bit or the like is mounted, the screwdriver can be used as an electric screwdriver that can easily attach and remove screws by operating only one lever.

  The switch lever 11 is provided with a lock mechanism. When the changeover switch 13 near the switch lever 11 in the grip portion is pushed upward, the switch lever 11 can be locked and lowered. In this state, the lock of the switch lever 11 can be released. As a result, the switch lever 11 is locked, so that careless rotation of the chuck portion 12 for fixing the bit can be prevented. Further, since the grip portion of the casing 9 is provided with fine irregularities on its surface and provided with the anti-slip 14, the power tool 10 can be handled more safely.

  The chuck portion 12 is connected to the drive unit 4 in a state where the front end protrudes outside the casing 9. After inserting the rear end of the bit from the front end, the chuck 12 is connected to the front end of the power tool 10. When the cover 15 is rotated, the bit can be fixed.

FIG. 3 is an explanatory view showing the internal structure of the rotary power tool according to the present invention. It is a wiring diagram of a control panel. It is a front view of the rotary electrician concerning this invention.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Charger 2 Socket 3 Switch 4 Drive unit 5 Motor 6 Control panel 7 Battery 8 Light emitting diode (LED)
9 Casing 10 Rotary power tool (power tool)
DESCRIPTION OF SYMBOLS 11 Switch lever 12 Chuck part 13 Changeover switch 14 Non-slip 15 Cover

Claims (2)

A charger (1) capable of converting an alternating current into a direct current and outputting the same, a plug (2) for a charger plug, a switch (3), a drive unit (4), a motor (5), a battery (7), In a rotary power tool including a light emitting diode (8) and a casing (9),
If the switch (3) is turned on while the charger (1) is connected to the outlet (2) and power is supplied, the light emitting diode (8) is turned on by a part of the supplied current and the remaining power is supplied. When the battery (7) is charged with the current and the motor (5) is driven and the switch (3) is turned off, the battery (7) is charged with the supplied current and the light emitting diode (8) is charged. When the switch (3) is turned on when the charger (1) is not connected to the outlet (2) when the charger (1) is connected, a circuit for driving the electric motor (5) with the electric power of the battery (7) is provided. The charging current flowing through the battery (7) is suppressed so as not to exceed a predetermined value. When the charging current is insufficient, the charger (1) acts to supply the insufficient amount, and the battery (7) is operated. When the light-emitting diode (8) flashes or lights up when Rotary power tool, characterized in that the control panel (6) provided in the casing (9) to prevent let.   The control panel (6) has a configuration in which an integrated circuit (IC), a first resistor (R1), a first diode (D1), and a second diode (D2) are connected in series. The current supplied from the port (2) flows in the order of the battery (7), the integrated circuit (IC), the first resistor (R1), and the first diode (D1), and flows again into the insertion port (2). At the same time, a circuit flowing into the outlet (2) via the light emitting diode (8) and the second resistor (R2), and a current supplied from the outlet (2) when the switch (3) is turned on. 2. A rotary electric tool according to claim 1, wherein a part of the rotary electric tool is provided with a circuit which flows through the switch (3) into the electric motor (5) and then into the outlet (2).

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